Thanks to visit codestin.com
Credit goes to github.com

Skip to content

Commit 9a0e6f1

Browse files
shayshyirleon
shayshyi
authored and
rleon
committed
RDMA/core: Silence oversized kvmalloc() warning
syzkaller triggered an oversized kvmalloc() warning. Silence it by adding __GFP_NOWARN. syzkaller log: WARNING: CPU: 7 PID: 518 at mm/util.c:665 __kvmalloc_node_noprof+0x175/0x180 CPU: 7 UID: 0 PID: 518 Comm: c_repro Not tainted 6.11.0-rc6+ #6 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.13.0-0-gf21b5a4aeb02-prebuilt.qemu.org 04/01/2014 RIP: 0010:__kvmalloc_node_noprof+0x175/0x180 RSP: 0018:ffffc90001e67c10 EFLAGS: 00010246 RAX: 0000000000000100 RBX: 0000000000000400 RCX: ffffffff8149d46b RDX: 0000000000000000 RSI: ffff8881030fae80 RDI: 0000000000000002 RBP: 000000712c800000 R08: 0000000000000100 R09: 0000000000000000 R10: ffffc90001e67c10 R11: 0030ae0601000000 R12: 0000000000000000 R13: 0000000000000000 R14: 00000000ffffffff R15: 0000000000000000 FS: 00007fde79159740(0000) GS:ffff88813bdc0000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000020000180 CR3: 0000000105eb4005 CR4: 00000000003706b0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: <TASK> ib_umem_odp_get+0x1f6/0x390 mlx5_ib_reg_user_mr+0x1e8/0x450 ib_uverbs_reg_mr+0x28b/0x440 ib_uverbs_write+0x7d3/0xa30 vfs_write+0x1ac/0x6c0 ksys_write+0x134/0x170 ? __sanitizer_cov_trace_pc+0x1c/0x50 do_syscall_64+0x50/0x110 entry_SYSCALL_64_after_hwframe+0x76/0x7e Fixes: 3782495 ("RDMA/odp: Use kvcalloc for the dma_list and page_list") Signed-off-by: Shay Drory <[email protected]> Link: https://patch.msgid.link/c6cb92379de668be94894f49c2cfa40e73f94d56.1742388096.git.leonro@nvidia.com Signed-off-by: Leon Romanovsky <[email protected]>
1 parent 45f5dcd commit 9a0e6f1

File tree

1 file changed

+4
-2
lines changed

1 file changed

+4
-2
lines changed

‎drivers/infiniband/core/umem_odp.c‎

Lines changed: 4 additions & 2 deletions
Original file line numberDiff line numberDiff line change
@@ -76,12 +76,14 @@ static inline int ib_init_umem_odp(struct ib_umem_odp *umem_odp,
7676

7777
npfns = (end - start) >> PAGE_SHIFT;
7878
umem_odp->pfn_list = kvcalloc(
79-
npfns, sizeof(*umem_odp->pfn_list), GFP_KERNEL);
79+
npfns, sizeof(*umem_odp->pfn_list),
80+
GFP_KERNEL | __GFP_NOWARN);
8081
if (!umem_odp->pfn_list)
8182
return -ENOMEM;
8283

8384
umem_odp->dma_list = kvcalloc(
84-
ndmas, sizeof(*umem_odp->dma_list), GFP_KERNEL);
85+
ndmas, sizeof(*umem_odp->dma_list),
86+
GFP_KERNEL | __GFP_NOWARN);
8587
if (!umem_odp->dma_list) {
8688
ret = -ENOMEM;
8789
goto out_pfn_list;

0 commit comments

Comments
 (0)