Change mutex and spinlock management to avoid sleep
in atomic issue.

Signed-off-by: Arnaud Pouliquen <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Mark Brown <[email protected]>

Add ACPI entry for cros_ec_codec.

Signed-off-by: Yu-Hsuan Hsu <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Mark Brown <[email protected]>

MIC BIAS Internal1 is broken at the moment because we always
enable the internal rbias resistor to the TX2 line (connected to
the headset microphone), rather than enabling the resistor connected
to TX1.

Move the RBIAS code to pm8916_wcd_analog_enable_micbias_int1/2()
to fix this.

Fixes: 585e881 ("ASoC: codecs: Add msm8916-wcd analog codec")
Cc: Srinivas Kandagatla <[email protected]>
Signed-off-by: Stephan Gerhold <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Mark Brown <[email protected]>

For some reason, attempting to route audio through QDSP6 on MSM8916
causes the RX interpolation path to get "stuck" after playing audio
a few times. In this situation, the analog codec part is still working,
but the RX path in the digital codec stops working, so you only hear
the analog parts powering up. After a reboot everything works again.

So far I was not able to reproduce the problem when using lpass-cpu.

The downstream kernel driver avoids this by resetting the RX
interpolation path after use. In mainline we do something similar
for the TX decimator (LPASS_CDC_CLK_TX_RESET_B1_CTL), but the
interpolator reset (LPASS_CDC_CLK_RX_RESET_CTL) got lost when the
msm8916-wcd driver was split into analog and digital.

Fix this problem by adding the reset to
msm8916_wcd_digital_enable_interpolator().

Fixes: 150db8c ("ASoC: codecs: Add msm8916-wcd digital codec")
Cc: Srinivas Kandagatla <[email protected]>
Signed-off-by: Stephan Gerhold <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Mark Brown <[email protected]>

RM500Q is a 5G module from Quectel, supporting both standalone and
non-standalone modes. Unlike other recent Quectel modems, it is possible
to identify the diagnostic interface (bInterfaceProtocol is unique).
Thus, there is no need to check for the number of endpoints or reserve
interfaces. The interface number is still dynamic though, so matching on
interface number is not possible and two entries have to be added to the
table.

Output from usb-devices with all interfaces enabled (order is diag,
nmea, at_port, modem, rmnet and adb):

Bus 004 Device 007: ID 2c7c:0800 Quectel Wireless Solutions Co., Ltd.
Device Descriptor:
  bLength                18
  bDescriptorType         1
  bcdUSB               3.20
  bDeviceClass            0 (Defined at Interface level)
  bDeviceSubClass         0
  bDeviceProtocol         0
  bMaxPacketSize0         9
  idVendor           0x2c7c Quectel Wireless Solutions Co., Ltd.
  idProduct          0x0800
  bcdDevice            4.14
  iManufacturer           1 Quectel
  iProduct                2 LTE-A Module
  iSerial                 3 40046d60
  bNumConfigurations      1
  Configuration Descriptor:
    bLength                 9
    bDescriptorType         2
    wTotalLength          328
    bNumInterfaces          6
    bConfigurationValue     1
    iConfiguration          4 DIAG_SER_RMNET
    bmAttributes         0xa0
      (Bus Powered)
      Remote Wakeup
    MaxPower              224mA
    Interface Descriptor:
      bLength                 9
      bDescriptorType         4
      bInterfaceNumber        0
      bAlternateSetting       0
      bNumEndpoints           2
      bInterfaceClass       255 Vendor Specific Class
      bInterfaceSubClass    255 Vendor Specific Subclass
      bInterfaceProtocol     48
      iInterface              0
      Endpoint Descriptor:
        bLength                 7
        bDescriptorType         5
        bEndpointAddress     0x81  EP 1 IN
        bmAttributes            2
          Transfer Type            Bulk
          Synch Type               None
          Usage Type               Data
        wMaxPacketSize     0x0400  1x 1024 bytes
        bInterval               0
        bMaxBurst               0
      Endpoint Descriptor:
        bLength                 7
        bDescriptorType         5
        bEndpointAddress     0x01  EP 1 OUT
        bmAttributes            2
          Transfer Type            Bulk
          Synch Type               None
          Usage Type               Data
        wMaxPacketSize     0x0400  1x 1024 bytes
        bInterval               0
        bMaxBurst               0
    Interface Descriptor:
      bLength                 9
      bDescriptorType         4
      bInterfaceNumber        1
      bAlternateSetting       0
      bNumEndpoints           3
      bInterfaceClass       255 Vendor Specific Class
      bInterfaceSubClass      0
      bInterfaceProtocol      0
      iInterface              0
      ** UNRECOGNIZED:  05 24 00 10 01
      ** UNRECOGNIZED:  05 24 01 00 00
      ** UNRECOGNIZED:  04 24 02 02
      ** UNRECOGNIZED:  05 24 06 00 00
      Endpoint Descriptor:
        bLength                 7
        bDescriptorType         5
        bEndpointAddress     0x83  EP 3 IN
        bmAttributes            3
          Transfer Type            Interrupt
          Synch Type               None
          Usage Type               Data
        wMaxPacketSize     0x000a  1x 10 bytes
        bInterval               9
        bMaxBurst               0
      Endpoint Descriptor:
        bLength                 7
        bDescriptorType         5
        bEndpointAddress     0x82  EP 2 IN
        bmAttributes            2
          Transfer Type            Bulk
          Synch Type               None
          Usage Type               Data
        wMaxPacketSize     0x0400  1x 1024 bytes
        bInterval               0
        bMaxBurst               0
      Endpoint Descriptor:
        bLength                 7
        bDescriptorType         5
        bEndpointAddress     0x02  EP 2 OUT
        bmAttributes            2
          Transfer Type            Bulk
          Synch Type               None
          Usage Type               Data
        wMaxPacketSize     0x0400  1x 1024 bytes
        bInterval               0
        bMaxBurst               0
    Interface Descriptor:
      bLength                 9
      bDescriptorType         4
      bInterfaceNumber        2
      bAlternateSetting       0
      bNumEndpoints           3
      bInterfaceClass       255 Vendor Specific Class
      bInterfaceSubClass      0
      bInterfaceProtocol      0
      iInterface              0
      ** UNRECOGNIZED:  05 24 00 10 01
      ** UNRECOGNIZED:  05 24 01 00 00
      ** UNRECOGNIZED:  04 24 02 02
      ** UNRECOGNIZED:  05 24 06 00 00
      Endpoint Descriptor:
        bLength                 7
        bDescriptorType         5
        bEndpointAddress     0x85  EP 5 IN
        bmAttributes            3
          Transfer Type            Interrupt
          Synch Type               None
          Usage Type               Data
        wMaxPacketSize     0x000a  1x 10 bytes
        bInterval               9
        bMaxBurst               0
      Endpoint Descriptor:
        bLength                 7
        bDescriptorType         5
        bEndpointAddress     0x84  EP 4 IN
        bmAttributes            2
          Transfer Type            Bulk
          Synch Type               None
          Usage Type               Data
        wMaxPacketSize     0x0400  1x 1024 bytes
        bInterval               0
        bMaxBurst               0
      Endpoint Descriptor:
        bLength                 7
        bDescriptorType         5
        bEndpointAddress     0x03  EP 3 OUT
        bmAttributes            2
          Transfer Type            Bulk
          Synch Type               None
          Usage Type               Data
        wMaxPacketSize     0x0400  1x 1024 bytes
        bInterval               0
        bMaxBurst               0
    Interface Descriptor:
      bLength                 9
      bDescriptorType         4
      bInterfaceNumber        3
      bAlternateSetting       0
      bNumEndpoints           3
      bInterfaceClass       255 Vendor Specific Class
      bInterfaceSubClass      0
      bInterfaceProtocol      0
      iInterface              0
      ** UNRECOGNIZED:  05 24 00 10 01
      ** UNRECOGNIZED:  05 24 01 00 00
      ** UNRECOGNIZED:  04 24 02 02
      ** UNRECOGNIZED:  05 24 06 00 00
      Endpoint Descriptor:
        bLength                 7
        bDescriptorType         5
        bEndpointAddress     0x87  EP 7 IN
        bmAttributes            3
          Transfer Type            Interrupt
          Synch Type               None
          Usage Type               Data
        wMaxPacketSize     0x000a  1x 10 bytes
        bInterval               9
        bMaxBurst               0
      Endpoint Descriptor:
        bLength                 7
        bDescriptorType         5
        bEndpointAddress     0x86  EP 6 IN
        bmAttributes            2
          Transfer Type            Bulk
          Synch Type               None
          Usage Type               Data
        wMaxPacketSize     0x0400  1x 1024 bytes
        bInterval               0
        bMaxBurst               0
      Endpoint Descriptor:
        bLength                 7
        bDescriptorType         5
        bEndpointAddress     0x04  EP 4 OUT
        bmAttributes            2
          Transfer Type            Bulk
          Synch Type               None
          Usage Type               Data
        wMaxPacketSize     0x0400  1x 1024 bytes
        bInterval               0
        bMaxBurst               0
    Interface Descriptor:
      bLength                 9
      bDescriptorType         4
      bInterfaceNumber        4
      bAlternateSetting       0
      bNumEndpoints           3
      bInterfaceClass       255 Vendor Specific Class
      bInterfaceSubClass    255 Vendor Specific Subclass
      bInterfaceProtocol    255 Vendor Specific Protocol
      iInterface              5 CDEV Serial
      Endpoint Descriptor:
        bLength                 7
        bDescriptorType         5
        bEndpointAddress     0x88  EP 8 IN
        bmAttributes            3
          Transfer Type            Interrupt
          Synch Type               None
          Usage Type               Data
        wMaxPacketSize     0x0008  1x 8 bytes
        bInterval               9
        bMaxBurst               0
      Endpoint Descriptor:
        bLength                 7
        bDescriptorType         5
        bEndpointAddress     0x8e  EP 14 IN
        bmAttributes            2
          Transfer Type            Bulk
          Synch Type               None
          Usage Type               Data
        wMaxPacketSize     0x0400  1x 1024 bytes
        bInterval               0
        bMaxBurst               6
      Endpoint Descriptor:
        bLength                 7
        bDescriptorType         5
        bEndpointAddress     0x0f  EP 15 OUT
        bmAttributes            2
          Transfer Type            Bulk
          Synch Type               None
          Usage Type               Data
        wMaxPacketSize     0x0400  1x 1024 bytes
        bInterval               0
        bMaxBurst               2
    Interface Descriptor:
      bLength                 9
      bDescriptorType         4
      bInterfaceNumber        5
      bAlternateSetting       0
      bNumEndpoints           2
      bInterfaceClass       255 Vendor Specific Class
      bInterfaceSubClass     66
      bInterfaceProtocol      1
      iInterface              6 ADB Interface
      Endpoint Descriptor:
        bLength                 7
        bDescriptorType         5
        bEndpointAddress     0x05  EP 5 OUT
        bmAttributes            2
          Transfer Type            Bulk
          Synch Type               None
          Usage Type               Data
        wMaxPacketSize     0x0400  1x 1024 bytes
        bInterval               0
        bMaxBurst               0
      Endpoint Descriptor:
        bLength                 7
        bDescriptorType         5
        bEndpointAddress     0x89  EP 9 IN
        bmAttributes            2
          Transfer Type            Bulk
          Synch Type               None
          Usage Type               Data
        wMaxPacketSize     0x0400  1x 1024 bytes
        bInterval               0
        bMaxBurst               0
Binary Object Store Descriptor:
  bLength                 5
  bDescriptorType        15
  wTotalLength           42
  bNumDeviceCaps          3
  USB 2.0 Extension Device Capability:
    bLength                 7
    bDescriptorType        16
    bDevCapabilityType      2
    bmAttributes   0x00000006
      Link Power Management (LPM) Supported
  SuperSpeed USB Device Capability:
    bLength                10
    bDescriptorType        16
    bDevCapabilityType      3
    bmAttributes         0x00
    wSpeedsSupported   0x000f
      Device can operate at Low Speed (1Mbps)
      Device can operate at Full Speed (12Mbps)
      Device can operate at High Speed (480Mbps)
      Device can operate at SuperSpeed (5Gbps)
    bFunctionalitySupport   1
      Lowest fully-functional device speed is Full Speed (12Mbps)
    bU1DevExitLat           1 micro seconds
    bU2DevExitLat         500 micro seconds
  ** UNRECOGNIZED:  14 10 0a 00 01 00 00 00 00 11 00 00 30 40 0a 00 b0 40 0a 00
Device Status:     0x0000
  (Bus Powered)

Signed-off-by: Kristian Evensen <[email protected]>
Cc: stable <[email protected]>
Signed-off-by: Johan Hovold <[email protected]>

Get rid of the legacy IRQ domain and hardcoded IRQ base, since all the
Ingenic drivers and platform code have been updated to use devicetree.

This also fixes the kernel being flooded with messages like:

 irq: interrupt-controller@10001000 didn't like hwirq-0x0 to VIRQ8 mapping (rc=-19)

Fixes: 8bc7464 ("irqchip: ingenic: Alloc generic chips from IRQ domain").
Signed-off-by: Paul Cercueil <[email protected]>
Signed-off-by: Thomas Gleixner <[email protected]>
Tested-by: H. Nikolaus Schaller <[email protected]>
Tested-by: 周琰杰 (Zhou Yanjie) <[email protected]>
Acked-by: Marc Zyngier <[email protected]>
Link: https://lore.kernel.org/r/[email protected]

map->members is freed by ip_set_free() right before using it in
mtype_ext_cleanup() again. So we just have to move it down.

Reported-by: [email protected]
Fixes: 40cd63b ("netfilter: ipset: Support extensions which need a per data destroy function")
Acked-by: Jozsef Kadlecsik <[email protected]>
Signed-off-by: Cong Wang <[email protected]>
Signed-off-by: Pablo Neira Ayuso <[email protected]>

…/linux/kernel/git/sunxi/linux into clk-fixes

Pull Allwinner clk fixes from Maxime Ripard:

Our usual set of fixes for Allwinner, to fix the number of reported
clocks on the v3s, fixing the external clock on the R40, and some
fixes for the AR100 co-processor clocks.

* tag 'sunxi-clk-fixes-for-5.5' of https://git.kernel.org/pub/scm/linux/kernel/git/sunxi/linux:
  clk: sunxi-ng: h6-r: Fix AR100/R_APB2 parent order
  clk: sunxi-ng: h6-r: Simplify R_APB1 clock definition
  clk: sunxi-ng: sun8i-r: Fix divider on APB0 clock
  clk: sunxi-ng: r40: Allow setting parent rate for external clock outputs
  clk: sunxi-ng: v3s: Fix incorrect number of hw_clks.

An earlier commit (1b78957,
"netfilter: arp_tables: init netns pointer in xt_tgchk_param struct")
fixed missing net initialization for arptables, but turns out it was
incomplete.  We can get a very similar struct net NULL deref during
error unwinding:

general protection fault: 0000 [#1] PREEMPT SMP KASAN
RIP: 0010:xt_rateest_put+0xa1/0x440 net/netfilter/xt_RATEEST.c:77
 xt_rateest_tg_destroy+0x72/0xa0 net/netfilter/xt_RATEEST.c:175
 cleanup_entry net/ipv4/netfilter/arp_tables.c:509 [inline]
 translate_table+0x11f4/0x1d80 net/ipv4/netfilter/arp_tables.c:587
 do_replace net/ipv4/netfilter/arp_tables.c:981 [inline]
 do_arpt_set_ctl+0x317/0x650 net/ipv4/netfilter/arp_tables.c:1461

Also init the netns pointer in xt_tgdtor_param struct.

Fixes: add6746 ("netfilter: add struct net * to target parameters")
Reported-by: [email protected]
Signed-off-by: Florian Westphal <[email protected]>
Signed-off-by: Pablo Neira Ayuso <[email protected]>

…s interfaces

Fix attribute name from "jtag_enable", which described twice to
"cpld3_version", which is expected to be instead of second appearance
of "jtag_enable".

Fixes: 2752e34 ("Documentation/ABI: Add new attribute for mlxreg-io sysfs interfaces")
Signed-off-by: Vadim Pasternak <[email protected]>
Signed-off-by: Andy Shevchenko <[email protected]>

Add missed "cpld4_version" attribute.

Fixes: 52675da ("Documentation/ABI: Add new attribute for mlxreg-io sysfs interfaces")
Signed-off-by: Vadim Pasternak <[email protected]>
Signed-off-by: Andy Shevchenko <[email protected]>

[BUG]
There are several different KASAN reports for balance + snapshot
workloads.  Involved call paths include:

   should_ignore_root+0x54/0xb0 [btrfs]
   build_backref_tree+0x11af/0x2280 [btrfs]
   relocate_tree_blocks+0x391/0xb80 [btrfs]
   relocate_block_group+0x3e5/0xa00 [btrfs]
   btrfs_relocate_block_group+0x240/0x4d0 [btrfs]
   btrfs_relocate_chunk+0x53/0xf0 [btrfs]
   btrfs_balance+0xc91/0x1840 [btrfs]
   btrfs_ioctl_balance+0x416/0x4e0 [btrfs]
   btrfs_ioctl+0x8af/0x3e60 [btrfs]
   do_vfs_ioctl+0x831/0xb10

   create_reloc_root+0x9f/0x460 [btrfs]
   btrfs_reloc_post_snapshot+0xff/0x6c0 [btrfs]
   create_pending_snapshot+0xa9b/0x15f0 [btrfs]
   create_pending_snapshots+0x111/0x140 [btrfs]
   btrfs_commit_transaction+0x7a6/0x1360 [btrfs]
   btrfs_mksubvol+0x915/0x960 [btrfs]
   btrfs_ioctl_snap_create_transid+0x1d5/0x1e0 [btrfs]
   btrfs_ioctl_snap_create_v2+0x1d3/0x270 [btrfs]
   btrfs_ioctl+0x241b/0x3e60 [btrfs]
   do_vfs_ioctl+0x831/0xb10

   btrfs_reloc_pre_snapshot+0x85/0xc0 [btrfs]
   create_pending_snapshot+0x209/0x15f0 [btrfs]
   create_pending_snapshots+0x111/0x140 [btrfs]
   btrfs_commit_transaction+0x7a6/0x1360 [btrfs]
   btrfs_mksubvol+0x915/0x960 [btrfs]
   btrfs_ioctl_snap_create_transid+0x1d5/0x1e0 [btrfs]
   btrfs_ioctl_snap_create_v2+0x1d3/0x270 [btrfs]
   btrfs_ioctl+0x241b/0x3e60 [btrfs]
   do_vfs_ioctl+0x831/0xb10

[CAUSE]
All these call sites are only relying on root->reloc_root, which can
undergo btrfs_drop_snapshot(), and since we don't have real refcount
based protection to reloc roots, we can reach already dropped reloc
root, triggering KASAN.

[FIX]
To avoid such access to unstable root->reloc_root, we should check
BTRFS_ROOT_DEAD_RELOC_TREE bit first.

This patch introduces wrappers that provide the correct way to check the
bit with memory barriers protection.

Most callers don't distinguish merged reloc tree and no reloc tree.  The
only exception is should_ignore_root(), as merged reloc tree can be
ignored, while no reloc tree shouldn't.

[CRITICAL SECTION ANALYSIS]
Although test_bit()/set_bit()/clear_bit() doesn't imply a barrier, the
DEAD_RELOC_TREE bit has extra help from transaction as a higher level
barrier, the lifespan of root::reloc_root and DEAD_RELOC_TREE bit are:

	NULL: reloc_root is NULL	PTR: reloc_root is not NULL
	0: DEAD_RELOC_ROOT bit not set	DEAD: DEAD_RELOC_ROOT bit set

	(NULL, 0)    Initial state		 __
	  |					 /\ Section A
        btrfs_init_reloc_root()			 \/
	  |				 	 __
	(PTR, 0)     reloc_root initialized      /\
          |					 |
	btrfs_update_reloc_root()		 |  Section B
          |					 |
	(PTR, DEAD)  reloc_root has been merged  \/
          |					 __
	=== btrfs_commit_transaction() ====================
	  |					 /\
	clean_dirty_subvols()			 |
	  |					 |  Section C
	(NULL, DEAD) reloc_root cleanup starts   \/
          |					 __
	btrfs_drop_snapshot()			 /\
	  |					 |  Section D
	(NULL, 0)    Back to initial state	 \/

Every have_reloc_root() or test_bit(DEAD_RELOC_ROOT) caller holds
transaction handle, so none of such caller can cross transaction boundary.

In Section A, every caller just found no DEAD bit, and grab reloc_root.

In the cross section A-B, caller may get no DEAD bit, but since reloc_root
is still completely valid thus accessing reloc_root is completely safe.

No test_bit() caller can cross the boundary of Section B and Section C.

In Section C, every caller found the DEAD bit, so no one will access
reloc_root.

In the cross section C-D, either caller gets the DEAD bit set, avoiding
access reloc_root no matter if it's safe or not.  Or caller get the DEAD
bit cleared, then access reloc_root, which is already NULL, nothing will
be wrong.

The memory write barriers are between the reloc_root updates and bit
set/clear, the pairing read side is before test_bit.

Reported-by: Zygo Blaxell <[email protected]>
Fixes: d2311e6 ("btrfs: relocation: Delay reloc tree deletion after merge_reloc_roots")
CC: [email protected] # 5.4+
Reviewed-by: Josef Bacik <[email protected]>
Signed-off-by: Qu Wenruo <[email protected]>
Reviewed-by: David Sterba <[email protected]>
[ barriers ]
Signed-off-by: David Sterba <[email protected]>

…llocations

THP page faults now attempt a __GFP_THISNODE allocation first, which
should only compact existing free memory, followed by another attempt
that can allocate from any node using reclaim/compaction effort
specified by global defrag setting and madvise.

This patch makes the following changes to the scheme:

 - Before the patch, the first allocation relies on a check for
   pageblock order and __GFP_IO to prevent excessive reclaim. This
   however affects also the second attempt, which is not limited to
   single node.

   Instead of that, reuse the existing check for costly order
   __GFP_NORETRY allocations, and make sure the first THP attempt uses
   __GFP_NORETRY. As a side-effect, all costly order __GFP_NORETRY
   allocations will bail out if compaction needs reclaim, while
   previously they only bailed out when compaction was deferred due to
   previous failures.

   This should be still acceptable within the __GFP_NORETRY semantics.

 - Before the patch, the second allocation attempt (on all nodes) was
   passing __GFP_NORETRY. This is redundant as the check for pageblock
   order (discussed above) was stronger. It's also contrary to
   madvise(MADV_HUGEPAGE) which means some effort to allocate THP is
   requested.

   After this patch, the second attempt doesn't pass __GFP_THISNODE nor
   __GFP_NORETRY.

To sum up, THP page faults now try the following attempts:

1. local node only THP allocation with no reclaim, just compaction.
2. for madvised VMA's or when synchronous compaction is enabled always - THP
   allocation from any node with effort determined by global defrag setting
   and VMA madvise
3. fallback to base pages on any node

Link: http://lkml.kernel.org/r/[email protected]
Fixes: b39d0ee ("mm, page_alloc: avoid expensive reclaim when compaction may not succeed")
Signed-off-by: Vlastimil Babka <[email protected]>
Acked-by: Michal Hocko <[email protected]>
Cc: Linus Torvalds <[email protected]>
Cc: Andrea Arcangeli <[email protected]>
Cc: Mel Gorman <[email protected]>
Cc: "Kirill A. Shutemov" <[email protected]>
Cc: David Rientjes <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>

…y section

When we remove an early section, we don't free the usage map, as the
usage maps of other sections are placed into the same page.  Once the
section is removed, it is no longer an early section (especially, the
memmap is freed).  When we re-add that section, the usage map is reused,
however, it is no longer an early section.  When removing that section
again, we try to kfree() a usage map that was allocated during early
boot - bad.

Let's check against PageReserved() to see if we are dealing with an
usage map that was allocated during boot.  We could also check against
!(PageSlab(usage_page) || PageCompound(usage_page)), but PageReserved() is
cleaner.

Can be triggered using memtrace under ppc64/powernv:

  $ mount -t debugfs none /sys/kernel/debug/
  $ echo 0x20000000 > /sys/kernel/debug/powerpc/memtrace/enable
  $ echo 0x20000000 > /sys/kernel/debug/powerpc/memtrace/enable
   ------------[ cut here ]------------
   kernel BUG at mm/slub.c:3969!
   Oops: Exception in kernel mode, sig: 5 [#1]
   LE PAGE_SIZE=3D64K MMU=3DHash SMP NR_CPUS=3D2048 NUMA PowerNV
   Modules linked in:
   CPU: 0 PID: 154 Comm: sh Not tainted 5.5.0-rc2-next-20191216-00005-g0be1dba7b7c0 #61
   NIP kfree+0x338/0x3b0
   LR section_deactivate+0x138/0x200
   Call Trace:
     section_deactivate+0x138/0x200
     __remove_pages+0x114/0x150
     arch_remove_memory+0x3c/0x160
     try_remove_memory+0x114/0x1a0
     __remove_memory+0x20/0x40
     memtrace_enable_set+0x254/0x850
     simple_attr_write+0x138/0x160
     full_proxy_write+0x8c/0x110
     __vfs_write+0x38/0x70
     vfs_write+0x11c/0x2a0
     ksys_write+0x84/0x140
     system_call+0x5c/0x68
   ---[ end trace 4b053cbd84e0db62 ]---

The first invocation will offline+remove memory blocks.  The second
invocation will first add+online them again, in order to offline+remove
them again (usually we are lucky and the exact same memory blocks will
get "reallocated").

Tested on powernv with boot memory: The usage map will not get freed.
Tested on x86-64 with DIMMs: The usage map will get freed.

Using Dynamic Memory under a Power DLAPR can trigger it easily.

Triggering removal (I assume after previously removed+re-added) of
memory from the HMC GUI can crash the kernel with the same call trace
and is fixed by this patch.

Link: http://lkml.kernel.org/r/[email protected]
Fixes: 326e1b8 ("mm/sparsemem: introduce a SECTION_IS_EARLY flag")
Signed-off-by: David Hildenbrand <[email protected]>
Tested-by: Pingfan Liu <[email protected]>
Cc: Dan Williams <[email protected]>
Cc: Oscar Salvador <[email protected]>
Cc: Michal Hocko <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>

…MD alignment

Patch series "Fix two above-47bit hint address vs.  THP bugs".

The two get_unmapped_area() implementations have to be fixed to provide
THP-friendly mappings if above-47bit hint address is specified.

This patch (of 2):

Filesystems use thp_get_unmapped_area() to provide THP-friendly
mappings.  For DAX in particular.

Normally, the kernel doesn't create userspace mappings above 47-bit,
even if the machine allows this (such as with 5-level paging on x86-64).
Not all user space is ready to handle wide addresses.  It's known that
at least some JIT compilers use higher bits in pointers to encode their
information.

Userspace can ask for allocation from full address space by specifying
hint address (with or without MAP_FIXED) above 47-bits.  If the
application doesn't need a particular address, but wants to allocate
from whole address space it can specify -1 as a hint address.

Unfortunately, this trick breaks thp_get_unmapped_area(): the function
would not try to allocate PMD-aligned area if *any* hint address
specified.

Modify the routine to handle it correctly:

 - Try to allocate the space at the specified hint address with length
   padding required for PMD alignment.
 - If failed, retry without length padding (but with the same hint
   address);
 - If the returned address matches the hint address return it.
 - Otherwise, align the address as required for THP and return.

The user specified hint address is passed down to get_unmapped_area() so
above-47bit hint address will be taken into account without breaking
alignment requirements.

Link: http://lkml.kernel.org/r/[email protected]
Fixes: b569bab ("x86/mm: Prepare to expose larger address space to userspace")
Signed-off-by: Kirill A. Shutemov <[email protected]>
Reported-by: Thomas Willhalm <[email protected]>
Tested-by: Dan Williams <[email protected]>
Cc: "Aneesh Kumar K . V" <[email protected]>
Cc: "Bruggeman, Otto G" <[email protected]>
Cc: <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>

…PMD alignment

Shmem/tmpfs tries to provide THP-friendly mappings if huge pages are
enabled.  But it doesn't work well with above-47bit hint address.

Normally, the kernel doesn't create userspace mappings above 47-bit,
even if the machine allows this (such as with 5-level paging on x86-64).
Not all user space is ready to handle wide addresses.  It's known that
at least some JIT compilers use higher bits in pointers to encode their
information.

Userspace can ask for allocation from full address space by specifying
hint address (with or without MAP_FIXED) above 47-bits.  If the
application doesn't need a particular address, but wants to allocate
from whole address space it can specify -1 as a hint address.

Unfortunately, this trick breaks THP alignment in shmem/tmp:
shmem_get_unmapped_area() would not try to allocate PMD-aligned area if
*any* hint address specified.

This can be fixed by requesting the aligned area if the we failed to
allocated at user-specified hint address.  The request with inflated
length will also take the user-specified hint address.  This way we will
not lose an allocation request from the full address space.

[[email protected]: fold in a fixup]
  Link: http://lkml.kernel.org/r/20191223231309.t6bh5hkbmokihpfu@box
Link: http://lkml.kernel.org/r/[email protected]
Fixes: b569bab ("x86/mm: Prepare to expose larger address space to userspace")
Signed-off-by: Kirill A. Shutemov <[email protected]>
Cc: "Willhalm, Thomas" <[email protected]>
Cc: Dan Williams <[email protected]>
Cc: "Bruggeman, Otto G" <[email protected]>
Cc: "Aneesh Kumar K . V" <[email protected]>
Cc: <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>

Currently slab percpu vmstats are flushed twice: during the memcg
offlining and just before freeing the memcg structure.  Each time percpu
counters are summed, added to the atomic counterparts and propagated up
by the cgroup tree.

The second flushing is required due to how recursive vmstats are
implemented: counters are batched in percpu variables on a local level,
and once a percpu value is crossing some predefined threshold, it spills
over to atomic values on the local and each ascendant levels.  It means
that without flushing some numbers cached in percpu variables will be
dropped on floor each time a cgroup is destroyed.  And with uptime the
error on upper levels might become noticeable.

The first flushing aims to make counters on ancestor levels more
precise.  Dying cgroups may resume in the dying state for a long time.
After kmem_cache reparenting which is performed during the offlining
slab counters of the dying cgroup don't have any chances to be updated,
because any slab operations will be performed on the parent level.  It
means that the inaccuracy caused by percpu batching will not decrease up
to the final destruction of the cgroup.  By the original idea flushing
slab counters during the offlining should minimize the visible
inaccuracy of slab counters on the parent level.

The problem is that percpu counters are not zeroed after the first
flushing.  So every cached percpu value is summed twice.  It creates a
small error (up to 32 pages per cpu, but usually less) which accumulates
on parent cgroup level.  After creating and destroying of thousands of
child cgroups, slab counter on parent level can be way off the real
value.

For now, let's just stop flushing slab counters on memcg offlining.  It
can't be done correctly without scheduling a work on each cpu: reading
and zeroing it during css offlining can race with an asynchronous
update, which doesn't expect values to be changed underneath.

With this change, slab counters on parent level will become eventually
consistent.  Once all dying children are gone, values are correct.  And
if not, the error is capped by 32 * NR_CPUS pages per dying cgroup.

It's not perfect, as slab are reparented, so any updates after the
reparenting will happen on the parent level.  It means that if a slab
page was allocated, a counter on child level was bumped, then the page
was reparented and freed, the annihilation of positive and negative
counter values will not happen until the child cgroup is released.  It
makes slab counters different from others, and it might want us to
implement flushing in a correct form again.  But it's also a question of
performance: scheduling a work on each cpu isn't free, and it's an open
question if the benefit of having more accurate counters is worth it.

We might also consider flushing all counters on offlining, not only slab
counters.

So let's fix the main problem now: make the slab counters eventually
consistent, so at least the error won't grow with uptime (or more
precisely the number of created and destroyed cgroups).  And think about
the accuracy of counters separately.

Link: http://lkml.kernel.org/r/[email protected]
Fixes: bee07b3 ("mm: memcontrol: flush percpu slab vmstats on kmem offlining")
Signed-off-by: Roman Gushchin <[email protected]>
Acked-by: Johannes Weiner <[email protected]>
Acked-by: Michal Hocko <[email protected]>
Cc: <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>

Commit 96a2b03 ("mm, debug_pagelloc: use static keys to enable
debugging") has introduced a static key to reduce overhead when
debug_pagealloc is compiled in but not enabled.  It relied on the
assumption that jump_label_init() is called before parse_early_param()
as in start_kernel(), so when the "debug_pagealloc=on" option is parsed,
it is safe to enable the static key.

However, it turns out multiple architectures call parse_early_param()
earlier from their setup_arch().  x86 also calls jump_label_init() even
earlier, so no issue was found while testing the commit, but same is not
true for e.g.  ppc64 and s390 where the kernel would not boot with
debug_pagealloc=on as found by our QA.

To fix this without tricky changes to init code of multiple
architectures, this patch partially reverts the static key conversion
from 96a2b03.  Init-time and non-fastpath calls (such as in arch
code) of debug_pagealloc_enabled() will again test a simple bool
variable.  Fastpath mm code is converted to a new
debug_pagealloc_enabled_static() variant that relies on the static key,
which is enabled in a well-defined point in mm_init() where it's
guaranteed that jump_label_init() has been called, regardless of
architecture.

[[email protected]: export _debug_pagealloc_enabled_early]
  Link: http://lkml.kernel.org/r/[email protected]
Link: http://lkml.kernel.org/r/[email protected]
Fixes: 96a2b03 ("mm, debug_pagelloc: use static keys to enable debugging")
Signed-off-by: Vlastimil Babka <[email protected]>
Signed-off-by: Stephen Rothwell <[email protected]>
Cc: Joonsoo Kim <[email protected]>
Cc: "Kirill A. Shutemov" <[email protected]>
Cc: Michal Hocko <[email protected]>
Cc: Vlastimil Babka <[email protected]>
Cc: Matthew Wilcox <[email protected]>
Cc: Mel Gorman <[email protected]>
Cc: Peter Zijlstra <[email protected]>
Cc: Borislav Petkov <[email protected]>
Cc: Qian Cai <[email protected]>
Cc: <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>

…atio()

Patch series "use div64_ul() instead of div_u64() if the divisor is
unsigned long".

We were first inspired by commit b0ab99e ("sched: Fix possible divide
by zero in avg_atom () calculation"), then refer to the recently analyzed
mm code, we found this suspicious place.

 201                 if (min) {
 202                         min *= this_bw;
 203                         do_div(min, tot_bw);
 204                 }

And we also disassembled and confirmed it:

  /usr/src/debug/kernel-4.9.168-016.ali3000/linux-4.9.168-016.ali3000.alios7.x86_64/mm/page-writeback.c: 201
  0xffffffff811c37da <__wb_calc_thresh+234>:      xor    %r10d,%r10d
  0xffffffff811c37dd <__wb_calc_thresh+237>:      test   %rax,%rax
  0xffffffff811c37e0 <__wb_calc_thresh+240>:      je 0xffffffff811c3800 <__wb_calc_thresh+272>
  /usr/src/debug/kernel-4.9.168-016.ali3000/linux-4.9.168-016.ali3000.alios7.x86_64/mm/page-writeback.c: 202
  0xffffffff811c37e2 <__wb_calc_thresh+242>:      imul   %r8,%rax
  /usr/src/debug/kernel-4.9.168-016.ali3000/linux-4.9.168-016.ali3000.alios7.x86_64/mm/page-writeback.c: 203
  0xffffffff811c37e6 <__wb_calc_thresh+246>:      mov    %r9d,%r10d    ---> truncates it to 32 bits here
  0xffffffff811c37e9 <__wb_calc_thresh+249>:      xor    %edx,%edx
  0xffffffff811c37eb <__wb_calc_thresh+251>:      div    %r10
  0xffffffff811c37ee <__wb_calc_thresh+254>:      imul   %rbx,%rax
  0xffffffff811c37f2 <__wb_calc_thresh+258>:      shr    $0x2,%rax
  0xffffffff811c37f6 <__wb_calc_thresh+262>:      mul    %rcx
  0xffffffff811c37f9 <__wb_calc_thresh+265>:      shr    $0x2,%rdx
  0xffffffff811c37fd <__wb_calc_thresh+269>:      mov    %rdx,%r10

This series uses div64_ul() instead of div_u64() if the divisor is
unsigned long, to avoid truncation to 32-bit on 64-bit platforms.

This patch (of 3):

The variables 'min' and 'max' are unsigned long and do_div truncates
them to 32 bits, which means it can test non-zero and be truncated to
zero for division.  Fix this issue by using div64_ul() instead.

Link: http://lkml.kernel.org/r/[email protected]
Fixes: 693108a ("writeback: make bdi->min/max_ratio handling cgroup writeback aware")
Signed-off-by: Wen Yang <[email protected]>
Reviewed-by: Andrew Morton <[email protected]>
Cc: Qian Cai <[email protected]>
Cc: Tejun Heo <[email protected]>
Cc: Jens Axboe <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>

The two variables 'numerator' and 'denominator', though they are
declared as long, they should actually be unsigned long (according to
the implementation of the fprop_fraction_percpu() function)

And do_div() does a 64-by-32 division, while the divisor 'denominator'
is unsigned long, thus 64-bit on 64-bit platforms.  Hence the proper
function to call is div64_ul().

Link: http://lkml.kernel.org/r/[email protected]
Signed-off-by: Wen Yang <[email protected]>
Reviewed-by: Andrew Morton <[email protected]>
Cc: Qian Cai <[email protected]>
Cc: Tejun Heo <[email protected]>
Cc: Jens Axboe <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>

Use div64_ul() instead of do_div() if the divisor is unsigned long, to
avoid truncation to 32-bit on 64-bit platforms.

Link: http://lkml.kernel.org/r/[email protected]
Signed-off-by: Wen Yang <[email protected]>
Reviewed-by: Andrew Morton <[email protected]>
Cc: Qian Cai <[email protected]>
Cc: Tejun Heo <[email protected]>
Cc: Jens Axboe <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>

…is valid

When booting with amd_iommu=off, the following WARNING message
appears:

  AMD-Vi: AMD IOMMU disabled on kernel command-line
  ------------[ cut here ]------------
  WARNING: CPU: 0 PID: 0 at kernel/workqueue.c:2772 flush_workqueue+0x42e/0x450
  Modules linked in:
  CPU: 0 PID: 0 Comm: swapper/0 Not tainted 5.5.0-rc3-amd-iommu #6
  Hardware name: Lenovo ThinkSystem SR655-2S/7D2WRCZ000, BIOS D8E101L-1.00 12/05/2019
  RIP: 0010:flush_workqueue+0x42e/0x450
  Code: ff 0f 0b e9 7a fd ff ff 4d 89 ef e9 33 fe ff ff 0f 0b e9 7f fd ff ff 0f 0b e9 bc fd ff ff 0f 0b e9 a8 fd ff ff e8 52 2c fe ff <0f> 0b 31 d2 48 c7 c6 e0 88 c5 95 48 c7 c7 d8 ad f0 95 e8 19 f5 04
  Call Trace:
   kmem_cache_destroy+0x69/0x260
   iommu_go_to_state+0x40c/0x5ab
   amd_iommu_prepare+0x16/0x2a
   irq_remapping_prepare+0x36/0x5f
   enable_IR_x2apic+0x21/0x172
   default_setup_apic_routing+0x12/0x6f
   apic_intr_mode_init+0x1a1/0x1f1
   x86_late_time_init+0x17/0x1c
   start_kernel+0x480/0x53f
   secondary_startup_64+0xb6/0xc0
  ---[ end trace 30894107c3749449 ]---
  x2apic: IRQ remapping doesn't support X2APIC mode
  x2apic disabled

The warning is caused by the calling of 'kmem_cache_destroy()'
in free_iommu_resources(). Here is the call path:

  free_iommu_resources
    kmem_cache_destroy
      flush_memcg_workqueue
        flush_workqueue

The root cause is that the IOMMU subsystem runs before the workqueue
subsystem, which the variable 'wq_online' is still 'false'.  This leads
to the statement 'if (WARN_ON(!wq_online))' in flush_workqueue() is
'true'.

Since the variable 'memcg_kmem_cache_wq' is not allocated during the
time, it is unnecessary to call flush_memcg_workqueue().  This prevents
the WARNING message triggered by flush_workqueue().

Link: http://lkml.kernel.org/r/[email protected]
Fixes: 92ee383 ("mm: fix race between kmem_cache destroy, create and deactivate")
Signed-off-by: Adrian Huang <[email protected]>
Reported-by: Xiaochun Lee <[email protected]>
Reviewed-by: Shakeel Butt <[email protected]>
Cc: Joerg Roedel <[email protected]>
Cc: Christoph Lameter <[email protected]>
Cc: Pekka Enberg <[email protected]>
Cc: David Rientjes <[email protected]>
Cc: Joonsoo Kim <[email protected]>
Cc: Michal Hocko <[email protected]>
Cc: Johannes Weiner <[email protected]>
Cc: <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>

Commit 99cb0db ("mm,thp: add read-only THP support for (non-shmem)
FS") introduced a new khugepaged scan result: SCAN_PAGE_HAS_PRIVATE, but
the corresponding description for trace events were not added.

Link: http://lkml.kernel.org/r/[email protected]
Fixes: 99cb0db ("mm,thp: add read-only THP support for (non-shmem) FS")
Signed-off-by: Yang Shi <[email protected]>
Cc: Song Liu <[email protected]>
Cc: Kirill A. Shutemov <[email protected]>
Cc: Anshuman Khandual <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>

We don't need it, and if we have it, then the retry handler will attempt
to copy the non-existent iovec with the inline iovec, with a segment
count that doesn't make sense.

Fixes: f67676d ("io_uring: ensure async punted read/write requests copy iovec")
Reported-by: Jonathan Lemon <[email protected]>
Signed-off-by: Jens Axboe <[email protected]>

This patch fix the issue with fixed link. With fixed-link
device opening fails due to macb_phylink_connect not
handling fixed-link mode, in which case no MAC-PHY connection
is needed and phylink_connect return success (0), however
in current driver attempt is made to search and connect to
PHY even for fixed-link.

Fixes: 7897b07 ("net: macb: convert to phylink")
Signed-off-by: Milind Parab <[email protected]>
Reviewed-by: Claudiu Beznea <[email protected]>
Signed-off-by: Jakub Kicinski <[email protected]>

Merge Intel Gen9 graphics fix from Akeem Abodunrin:
 "Insufficient control flow in certain data structures for some Intel
  Processors with Intel Processor Graphics may allow an unauthenticated
  user to potentially enable information disclosure via local access

  This provides mitigation for Gen9 hardware. Note that Gen8 is not
  impacted due to a previously implemented workaround.

  The mitigation involves using an existing hardware feature to forcibly
  clear down all EU state at each context switch"

* tag 'Intel-CVE-2019-14615' of emailed bundle from Akeem G Abodunrin <[email protected]>:
  drm/i915/gen9: Clear residual context state on context switch

RM500Q is a 5G module from Quectel, supporting both standalone and
non-standalone modes. The normal Quectel quirks apply (DTR and dynamic
interface numbers).

Signed-off-by: Kristian Evensen <[email protected]>
Acked-by: Bjørn Mork <[email protected]>
Signed-off-by: Jakub Kicinski <[email protected]>

The driver was doing a synchronous uninterruptible bulk-transfer without
using a timeout. This could lead to the driver hanging on probe due to a
malfunctioning (or malicious) device until the device is physically
disconnected. While sleeping in probe the driver prevents other devices
connected to the same hub from being added to (or removed from) the bus.

An arbitrary limit of five seconds should be more than enough.

Fixes: dbafc28 ("NFC: pn533: don't send USB data off of the stack")
Signed-off-by: Johan Hovold <[email protected]>
Reviewed-by: Greg Kroah-Hartman <[email protected]>
Signed-off-by: Jakub Kicinski <[email protected]>

We use PCI device path in the registered PMU name in order to distinguish
between multiple GPUs. But since tools/perf reserves a special meaning to
dash and colon characters we need to transliterate them to something else.
We choose an underscore.

v2:
 * Use strreplace. (Chris)
 * Dashes are not good either. (Chris)

Signed-off-by: Tvrtko Ursulin <[email protected]>
Reported-by: Dmitry Rogozhkin <[email protected]>
Fixes: 0548867 ("drm/i915/pmu: Support multiple GPUs")
Cc: Chris Wilson <[email protected]>
Cc: Michal Wajdeczko <[email protected]>
Cc: Andi Kleen <[email protected]>
Reviewed-by: Chris Wilson <[email protected]>
Link: https://patchwork.freedesktop.org/patch/msgid/[email protected]
(cherry picked from commit aebf3b5)
Signed-off-by: Joonas Lahtinen <[email protected]>

T6 can support 2 egress traffic management channels per port to
double the total number of traffic classes that can be configured.
In this configuration, if the class belongs to the other channel,
then all the queues must be bound again explicitly to the new class,
for the rate limit parameters on the other channel to take effect.

So, always explicitly bind all queues to the port rate limit traffic
class, regardless of the traffic management channel that it belongs
to. Also, only bind queues to port rate limit traffic class, if all
the queues don't already belong to an existing different traffic
class.

Fixes: 4ec4762 ("cxgb4: add TC-MATCHALL classifier egress offload")
Signed-off-by: Rahul Lakkireddy <[email protected]>
Signed-off-by: David S. Miller <[email protected]>

A queue can't belong to multiple traffic classes. So, reject
any such configuration that results in overlapped queues for a
traffic class.

Fixes: b1396c2 ("cxgb4: parse and configure TC-MQPRIO offload")
Signed-off-by: Rahul Lakkireddy <[email protected]>
Signed-off-by: David S. Miller <[email protected]>

…kernel/git/wsa/linux

Pull i2c fixes from Wolfram Sang:
 "Two runtime PM fixes and one leak fix"

* 'i2c/for-current' of git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux:
  i2c: iop3xx: Fix memory leak in probe error path
  i2c: tegra: Properly disable runtime PM on driver's probe error
  i2c: tegra: Fix suspending in active runtime PM state

Pull networking fixes from David Miller:

 1) Fix non-blocking connect() in x25, from Martin Schiller.

 2) Fix spurious decryption errors in kTLS, from Jakub Kicinski.

 3) Netfilter use-after-free in mtype_destroy(), from Cong Wang.

 4) Limit size of TSO packets properly in lan78xx driver, from Eric
    Dumazet.

 5) r8152 probe needs an endpoint sanity check, from Johan Hovold.

 6) Prevent looping in tcp_bpf_unhash() during sockmap/tls free, from
    John Fastabend.

 7) hns3 needs short frames padded on transmit, from Yunsheng Lin.

 8) Fix netfilter ICMP header corruption, from Eyal Birger.

 9) Fix soft lockup when low on memory in hns3, from Yonglong Liu.

10) Fix NTUPLE firmware command failures in bnxt_en, from Michael Chan.

11) Fix memory leak in act_ctinfo, from Eric Dumazet.

* git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net: (91 commits)
  cxgb4: reject overlapped queues in TC-MQPRIO offload
  cxgb4: fix Tx multi channel port rate limit
  net: sched: act_ctinfo: fix memory leak
  bnxt_en: Do not treat DSN (Digital Serial Number) read failure as fatal.
  bnxt_en: Fix ipv6 RFS filter matching logic.
  bnxt_en: Fix NTUPLE firmware command failures.
  net: systemport: Fixed queue mapping in internal ring map
  net: dsa: bcm_sf2: Configure IMP port for 2Gb/sec
  net: dsa: sja1105: Don't error out on disabled ports with no phy-mode
  net: phy: dp83867: Set FORCE_LINK_GOOD to default after reset
  net: hns: fix soft lockup when there is not enough memory
  net: avoid updating qdisc_xmit_lock_key in netdev_update_lockdep_key()
  net/sched: act_ife: initalize ife->metalist earlier
  netfilter: nat: fix ICMP header corruption on ICMP errors
  net: wan: lapbether.c: Use built-in RCU list checking
  netfilter: nf_tables: fix flowtable list del corruption
  netfilter: nf_tables: fix memory leak in nf_tables_parse_netdev_hooks()
  netfilter: nf_tables: remove WARN and add NLA_STRING upper limits
  netfilter: nft_tunnel: ERSPAN_VERSION must not be null
  netfilter: nft_tunnel: fix null-attribute check
  ...

…kernel/git/riscv/linux

Pull RISC-V fixes from Paul Walmsley:
 "Three fixes for RISC-V:

   - Don't free and reuse memory containing the code that CPUs parked at
     boot reside in.

   - Fix rv64 build problems for ubsan and some modules by adding
     logical and arithmetic shift helpers for 128-bit values. These are
     from libgcc and are similar to what's present for ARM64.

   - Fix vDSO builds to clean up their own temporary files"

* tag 'riscv/for-v5.5-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/riscv/linux:
  riscv: Less inefficient gcc tishift helpers (and export their symbols)
  riscv: delete temporary files
  riscv: make sure the cores stay looping in .Lsecondary_park

…kernel/git/jack/linux-fs

Pull reiserfs fix from Jan Kara:
 "A fixup of a recently merged reiserfs fix which has caused problem
  when xattrs were not compiled in"

* tag 'fixes_for_v5.5-rc8' of git://git.kernel.org/pub/scm/linux/kernel/git/jack/linux-fs:
  reiserfs: fix handling of -EOPNOTSUPP in reiserfs_for_each_xattr

While working on a tool to convert SQL syntex into the histogram language of
the kernel, I discovered the following bug:

 # echo 'first u64 start_time u64 end_time pid_t pid u64 delta' >> synthetic_events
 # echo 'hist:keys=pid:start=common_timestamp' > events/sched/sched_waking/trigger
 # echo 'hist:keys=next_pid:delta=common_timestamp-$start,start2=$start:onmatch(sched.sched_waking).trace(first,$start2,common_timestamp,next_pid,$delta)' > events/sched/sched_switch/trigger

Would not display any histograms in the sched_switch histogram side.

But if I were to swap the location of

  "delta=common_timestamp-$start" with "start2=$start"

Such that the last line had:

 # echo 'hist:keys=next_pid:start2=$start,delta=common_timestamp-$start:onmatch(sched.sched_waking).trace(first,$start2,common_timestamp,next_pid,$delta)' > events/sched/sched_switch/trigger

The histogram works as expected.

What I found out is that the expressions clear out the value once it is
resolved. As the variables are resolved in the order listed, when
processing:

  delta=common_timestamp-$start

The $start is cleared. When it gets to "start2=$start", it errors out with
"unresolved symbol" (which is silent as this happens at the location of the
trace), and the histogram is dropped.

When processing the histogram for variable references, instead of adding a
new reference for a variable used twice, use the same reference. That way,
not only is it more efficient, but the order will no longer matter in
processing of the variables.

From Tom Zanussi:

 "Just to clarify some more about what the problem was is that without
  your patch, we would have two separate references to the same variable,
  and during resolve_var_refs(), they'd both want to be resolved
  separately, so in this case, since the first reference to start wasn't
  part of an expression, it wouldn't get the read-once flag set, so would
  be read normally, and then the second reference would do the read-once
  read and also be read but using read-once.  So everything worked and
  you didn't see a problem:

   from: start2=$start,delta=common_timestamp-$start

  In the second case, when you switched them around, the first reference
  would be resolved by doing the read-once, and following that the second
  reference would try to resolve and see that the variable had already
  been read, so failed as unset, which caused it to short-circuit out and
  not do the trigger action to generate the synthetic event:

   to: delta=common_timestamp-$start,start2=$start

  With your patch, we only have the single resolution which happens
  correctly the one time it's resolved, so this can't happen."

Link: https://lore.kernel.org/r/[email protected]

Cc: [email protected]
Fixes: 067fe03 ("tracing: Add variable reference handling to hist triggers")
Reviewed-by: Tom Zanuss <[email protected]>
Tested-by: Tom Zanussi <[email protected]>
Signed-off-by: Steven Rostedt (VMware) <[email protected]>

When trace_clock option is not set and unstable clcok detected,
tracing_set_default_clock() sets trace_clock(ThinkPad A285 is one of
case). In that case, if lockdown is in effect, null pointer
dereference error happens in ring_buffer_set_clock().

Link: http://lkml.kernel.org/r/[email protected]

Cc: [email protected]
Fixes: 17911ff ("tracing: Add locked_down checks to the open calls of files created for tracefs")
Bugzilla: https://bugzilla.redhat.com/show_bug.cgi?id=1788488
Signed-off-by: Masami Ichikawa <[email protected]>
Signed-off-by: Steven Rostedt (VMware) <[email protected]>

fds field of struct io_uring_files_update is problematic with regards
to compat user space, as pointer size is different in 32-bit, 32-on-64-bit,
and 64-bit user space.  In order to avoid custom handling of compat in
the syscall implementation, make fds __u64 and use u64_to_user_ptr in
order to retrieve it.  Also, align the field naturally and check that
no garbage is passed there.

Fixes: c3a31e6 ("io_uring: add support for IORING_REGISTER_FILES_UPDATE")
Signed-off-by: Eugene Syromiatnikov <[email protected]>
Signed-off-by: Jens Axboe <[email protected]>

Currently, we just assume that it will stick around by virtue of the
submitter's reference, but later patches will allow the syscall to
return early and we can't rely on that reference at that point.

While I'm not aware of any reports of it, Xiubo pointed out that this
may fix a use-after-free.  If the wait for a reply times out or is
canceled via signal, and then the reply comes in after the syscall
returns, the client can end up trying to access r_parent without a
reference.

Take an extra reference to the inode when setting r_parent and release
it when releasing the request.

Cc: [email protected]
Signed-off-by: Jeff Layton <[email protected]>
Reviewed-by: "Yan, Zheng" <[email protected]>
Signed-off-by: Ilya Dryomov <[email protected]>

Commit 99c9a92 ("tracing/uprobe: Fix double perf_event
linking on multiprobe uprobe") moved trace_uprobe_filter on
trace_probe_event. However, since it introduced a flexible
data structure with char array and type casting, the
alignment of trace_uprobe_filter can be broken.

This changes the type of the array to trace_uprobe_filter
data strucure to fix it.

Link: http://lore.kernel.org/r/[email protected]
Link: http://lkml.kernel.org/r/157966340499.5107.10978352478952144902.stgit@devnote2

Fixes: 99c9a92 ("tracing/uprobe: Fix double perf_event linking on multiprobe uprobe")
Suggested-by: Peter Zijlstra <[email protected]>
Signed-off-by: Masami Hiramatsu <[email protected]>
Signed-off-by: Steven Rostedt (VMware) <[email protected]>

Pull io_uring fix from Jens Axboe:
 "This was supposed to have gone in last week, but due to a brain fart
  on my part, I forgot that we made this struct addition in the 5.5
  cycle. So here it is for 5.5, to prevent having a 32 vs 64-bit
  compatability issue with the files_update command"

* tag 'io_uring-5.5-2020-01-22' of git://git.kernel.dk/linux-block:
  io_uring: fix compat for IORING_REGISTER_FILES_UPDATE

When switching to using generic LED name composition mechanism via
devm_led_classdev_register_ext() API the part of code initializing
struct gpio_led's template name property was removed alongside.
It was however overlooked that the property was also passed to
devm_fwnode_get_gpiod_from_child() in place of "label" parameter,
which when set to NULL, results in gpio label being initialized to '?'.

It could be observed in debugfs and failed to properly identify
gpio association with LED consumer.

Fix this shortcoming by updating the GPIO label after the LED is
registered and its final name is known.

Fixes: d7235f5 ("leds: gpio: Use generic support for composing LED names")
Cc: Russell King <[email protected]>
Reviewed-by: Linus Walleij <[email protected]>
Signed-off-by: Jacek Anaszewski <[email protected]>
[fixed comment]
Signed-off-by: Pavel Machek <[email protected]>

If a node is ignored, do not get a reference to it. Fix the bug by moving
fwnode_handle_get() where a reference to an fwnode is saved for clarity.

Reported-by: Andy Shevchenko <[email protected]>
Reviewed-by: Andy Shevchenko <[email protected]>
Signed-off-by: Sakari Ailus <[email protected]>
Signed-off-by: Pavel Machek <[email protected]>

We need the of_match table if we want to use the compatible string in
the pmic's child node and get the led driver loaded automatically.

Signed-off-by: Bartosz Golaszewski <[email protected]>
Signed-off-by: Pavel Machek <[email protected]>

Apparently it is quite easy to forget ">" in quoting of email
address. This fixes it.

Signed-off-by: Pavel Machek <[email protected]>

Trivial cleanup removing empty line at wrong place.

Signed-off-by: Pavel Machek <[email protected]>

Add pointer to datasheet and fix typo in printk message.

Signed-off-by: Pavel Machek <[email protected]>

…kernel/git/groeck/linux-staging

Pull hwmon fixes from Guenter Roeck:

 - In hwmon core, do not use the hwmon parent device for device managed
   memory allocations, since parent device lifetime may not match hwmon
   device lifetime.

 - Fix discrepancy between read and write values in adt7475 driver.

 - Fix alarms and voltage limits in nct7802 driver.

* tag 'hwmon-for-v5.5-rc8' of git://git.kernel.org/pub/scm/linux/kernel/git/groeck/linux-staging:
  hwmon: (core) Do not use device managed functions for memory allocations
  hwmon: (adt7475) Make volt2reg return same reg as reg2volt input
  hwmon: (nct7802) Fix non-working alarm on voltages
  hwmon: (nct7802) Fix voltage limits to wrong registers

…/git/pavel/linux-leds

Pull LED fixes from Pavel Machek:
 "Jacek's fix for an uninitialized gpio label is why I'm requesting this
  pull; it fixes regression in debugging output in sysfs. Others are
  just bugfixes that should be safe.

  Everything has been in -next for while"

* tag 'leds-5.5-rc8' of git://git.kernel.org/pub/scm/linux/kernel/git/pavel/linux-leds:
  leds: lm3532: add pointer to documentation and fix typo
  leds: rb532: cleanup whitespace
  ledtrig-pattern: fix email address quoting in MODULE_AUTHOR()
  led: max77650: add of_match table
  leds-as3645a: Drop fwnode reference on ignored node
  leds: gpio: Fix uninitialized gpio label for fwnode based probe

Commit 8a23eb8 ("Make filldir[64]() verify the directory entry
filename is valid") added some minimal validity checks on the directory
entries passed to filldir[64]().  But they really were pretty minimal.

This fleshes out at least the name length check: we used to disallow
zero-length names, but really, negative lengths or oevr-long names
aren't ok either.  Both could happen if there is some filesystem
corruption going on.

Now, most filesystems tend to use just an "unsigned char" or similar for
the length of a directory entry name, so even with a corrupt filesystem
you should never see anything odd like that.  But since we then use the
name length to create the directory entry record length, let's make sure
it actually is half-way sensible.

Note how POSIX states that the size of a path component is limited by
NAME_MAX, but we actually use PATH_MAX for the check here.  That's
because while NAME_MAX is generally the correct maximum name length
(it's 255, for the same old "name length is usually just a byte on
disk"), there's nothing in the VFS layer that really cares.

So the real limitation at a VFS layer is the total pathname length you
can pass as a filename: PATH_MAX.

Signed-off-by: Linus Torvalds <[email protected]>

In commit 9f79b78 ("Convert filldir[64]() from __put_user() to
unsafe_put_user()") I changed filldir to not do individual __put_user()
accesses, but instead use unsafe_put_user() surrounded by the proper
user_access_begin/end() pair.

That make them enormously faster on modern x86, where the STAC/CLAC
games make individual user accesses fairly heavy-weight.

However, the user_access_begin() range was not really the exact right
one, since filldir() has the unfortunate problem that it needs to not
only fill out the new directory entry, it also needs to fix up the
previous one to contain the proper file offset.

It's unfortunate, but the "d_off" field in "struct dirent" is _not_ the
file offset of the directory entry itself - it's the offset of the next
one.  So we end up backfilling the offset in the previous entry as we
walk along.

But since x86 didn't really care about the exact range, and used to be
the only architecture that did anything fancy in user_access_begin() to
begin with, the filldir[64]() changes did something lazy, and even
commented on it:

	/*
	 * Note! This range-checks 'previous' (which may be NULL).
	 * The real range was checked in getdents
	 */
	if (!user_access_begin(dirent, sizeof(*dirent)))
		goto efault;

and it all worked fine.

But now 32-bit ppc is starting to also implement user_access_begin(),
and the fact that we faked the range to only be the (possibly not even
valid) previous directory entry becomes a problem, because ppc32 will
actually be using the range that is passed in for more than just "check
that it's user space".

This is a complete rewrite of Christophe's original patch.

By saving off the record length of the previous entry instead of a
pointer to it in the filldir data structures, we can simplify the range
check and the writing of the previous entry d_off field.  No need for
any conditionals in the user accesses themselves, although we retain the
conditional EINTR checking for the "was this the first directory entry"
signal handling latency logic.

Fixes: 9f79b78 ("Convert filldir[64]() from __put_user() to unsafe_put_user()")
Link: https://lore.kernel.org/lkml/a02d3426f93f7eb04960a4d9140902d278cab0bb.1579697910.git.christophe.leroy@c-s.fr/
Link: https://lore.kernel.org/lkml/408c90c4068b00ea8f1c41cca45b84ec23d4946b.1579783936.git.christophe.leroy@c-s.fr/
Reported-and-tested-by: Christophe Leroy <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>

…rnel/git/helgaas/pci

Pull PCI fix from Bjorn Helgaas:
 "Mark ATS as broken on AMD Navi14 GPU rev 0xc5 (Alex Deucher)"

* tag 'pci-v5.5-fixes-2' of git://git.kernel.org/pub/scm/linux/kernel/git/helgaas/pci:
  PCI: Mark AMD Navi14 GPU rev 0xc5 ATS as broken

…it/rafael/linux-pm

Pull power management fix from Rafael Wysocki:
 "Prevent the kernel from crashing during resume from hibernation if
  free pages contain leftover data from the restore kernel and
  init_on_free is set (Alexander Potapenko)"

* tag 'pm-5.5-rc8' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm:
  PM: hibernate: fix crashes with init_on_free=1

Pull ceph fix from Ilya Dryomov:
 "A fix for a potential use-after-free from Jeff, marked for stable"

* tag 'ceph-for-5.5-rc8' of https://github.com/ceph/ceph-client:
  ceph: hold extra reference to r_parent over life of request

…rnel/git/rostedt/linux-trace

Pull tracing fixes from Steven Rostedt:
 "Various tracing fixes:

   - Fix a function comparison warning for a xen trace event macro

   - Fix a double perf_event linking to a trace_uprobe_filter for
     multiple events

   - Fix suspicious RCU warnings in trace event code for using
     list_for_each_entry_rcu() when the "_rcu" portion wasn't needed.

   - Fix a bug in the histogram code when using the same variable

   - Fix a NULL pointer dereference when tracefs lockdown enabled and
     calling trace_set_default_clock()

   - A fix to a bug found with the double perf_event linking patch"

* tag 'trace-v5.5-rc6-2' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace:
  tracing/uprobe: Fix to make trace_uprobe_filter alignment safe
  tracing: Do not set trace clock if tracefs lockdown is in effect
  tracing: Fix histogram code when expression has same var as value
  tracing: trigger: Replace unneeded RCU-list traversals
  tracing/uprobe: Fix double perf_event linking on multiprobe uprobe
  tracing: xen: Ordered comparison of function pointers

Pull XArray fixes from Matthew Wilcox:
 "Primarily bugfixes, mostly around handling index wrap-around
  correctly.

  A couple of doc fixes and adding missing APIs.

  I had an oops live on stage at linux.conf.au this year, and it turned
  out to be a bug in xas_find() which I can't prove isn't triggerable in
  the current codebase. Then in looking for the bug, I spotted two more
  bugs.

  The bots have had a few days to chew on this with no problems
  reported, and it passes the test-suite (which now has more tests to
  make sure these problems don't come back)"

* tag 'xarray-5.5' of git://git.infradead.org/users/willy/linux-dax:
  XArray: Add xa_for_each_range
  XArray: Fix xas_find returning too many entries
  XArray: Fix xa_find_after with multi-index entries
  XArray: Fix infinite loop with entry at ULONG_MAX
  XArray: Add wrappers for nested spinlocks
  XArray: Improve documentation of search marks
  XArray: Fix xas_pause at ULONG_MAX