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

Skip to content

Segfault in async_cb_dispatcher_mark following an upgrade to ffi 1.16.1 #1050

@casperisfine

Description

@casperisfine

I haven't yet dug in the core dump, but opening an issue here for reference.

We saw a huge spike of 3k segfaults in just a dozen minutes after the upgrade:

[BUG] Segmentation fault at 0x0000000000000000
ruby 3.2.2 (2023-09-23 revision 6e984f9449) [x86_64-linux]

-- Threading information ---------------------------------------------------
Total ractor count: 1
Ruby thread count for this ractor: 18

-- C level backtrace information -------------------------------------------
/usr/local/ruby/bin/ruby(rb_vm_bugreport+0x1ef) [0x564558ad0eff] vm_dump.c:812
/usr/local/ruby/bin/ruby(rb_bug_for_fatal_signal+0xfc) [0x564558c5bb1c] error.c:1029
/usr/local/ruby/bin/ruby(sigsegv+0x4d) [0x564558a207cd] signal.c:964
/lib/x86_64-linux-gnu/libpthread.so.0(__restore_rt+0x0) [0x7fc42e372420]
/artifacts/bundle/ruby/3.2.0/gems/ffi-1.16.1/lib/ffi_c.so(async_cb_dispatcher_mark+0x4) [0x7fc425bfa334] Function.c:167
/usr/local/ruby/bin/ruby(ractor_local_storage_mark_i+0x18) [0x5645589ca338] ractor.c:3092
/usr/local/ruby/bin/ruby(rb_st_foreach+0x76) [0x564558a2db46] st.c:1580
/usr/local/ruby/bin/ruby(ractor_mark+0x13c) [0x5645589caefc] ractor.c:3107
/usr/local/ruby/bin/ruby(gc_mark_children+0x837) [0x5645588e7597] gc.c:7311
/usr/local/ruby/bin/ruby(gc_marks_rest+0x189) [0x5645588e8b09] gc.c:7431
/usr/local/ruby/bin/ruby(gc_start+0xf49) [0x5645588e9b29] gc.c:8718
/usr/local/ruby/bin/ruby(newobj_alloc+0x60e) [0x5645588eda3e] gc.c:2434
/usr/local/ruby/bin/ruby(rb_wb_protected_newobj_of+0x88) [0x5645588ee788] gc.c:2886
/usr/local/ruby/bin/ruby(ary_new+0xd0) [0x564558bc03d0] array.c:802
/usr/local/ruby/bin/ruby(rb_str_bytes+0x24) [0x564558a304d4] string.c:9135
/usr/local/ruby/bin/ruby(vm_call_cfunc_with_frame+0x135) [0x564558aaf4a5] vm_insnhelper.c:3293
/usr/local/ruby/bin/ruby(vm_exec_core+0x1c8) [0x564558ac3518] vm_insnhelper.c:5117
/usr/local/ruby/bin/ruby(rb_vm_exec+0xcb) [0x564558ab1f2b] vm.c:2438
/usr/local/ruby/bin/ruby(rb_yield+0x25e) [0x564558ab774e] vm.c:1451
/usr/local/ruby/bin/ruby(rb_ary_each+0x3c) [0x564558bc0bec] array.c:2740
/usr/local/ruby/bin/ruby(vm_call_cfunc_with_frame+0x135) [0x564558aaf4a5] vm_insnhelper.c:3293
/usr/local/ruby/bin/ruby(vm_exec_core+0x184a) [0x564558ac4b9a] vm_insnhelper.c:5117
/usr/local/ruby/bin/ruby(rb_vm_exec+0xcb) [0x564558ab1f2b] vm.c:2438
/usr/local/ruby/bin/ruby(vm_call0_body+0x4a3) [0x564558aba233] vm_eval.c:206
/usr/local/ruby/bin/ruby(rb_call0+0x223) [0x564558abdb43] vm_eval.c:87
/usr/local/ruby/bin/ruby(rb_funcallv_kw+0x3e) [0x564558abe5ee] vm_eval.c:876
/usr/local/ruby/bin/ruby(rb_class_new_instance_pass_kw+0x63) [0x56455897a523] object.c:2021
/usr/local/ruby/bin/ruby(vm_call_cfunc_with_frame+0x135) [0x564558aaf4a5] vm_insnhelper.c:3293
/usr/local/ruby/bin/ruby(vm_exec_core+0x1c8) [0x564558ac3518] vm_insnhelper.c:5117
/usr/local/ruby/bin/ruby(rb_vm_exec+0xcb) [0x564558ab1f2b] vm.c:2438
/usr/local/ruby/bin/ruby(rb_yield+0x25e) [0x564558ab774e] vm.c:1451
/usr/local/ruby/bin/ruby(rb_ary_each+0x3c) [0x564558bc0bec] array.c:2740
/usr/local/ruby/bin/ruby(vm_call_cfunc_with_frame+0x135) [0x564558aaf4a5] vm_insnhelper.c:3293
/usr/local/ruby/bin/ruby(vm_call_method_each_type+0x79) [0x564558ab3539] vm_insnhelper.c:3945
/usr/local/ruby/bin/ruby(vm_call_method+0xc4) [0x564558ab4044] vm_insnhelper.c:4095
/usr/local/ruby/bin/ruby(vm_exec_core+0x184a) [0x564558ac4b9a] vm_insnhelper.c:5117
/usr/local/ruby/bin/ruby(rb_vm_exec+0xcb) [0x564558ab1f2b] vm.c:2438
/usr/local/ruby/bin/ruby(rb_yield+0x25e) [0x564558ab774e] vm.c:1451
/usr/local/ruby/bin/ruby(rb_ary_each+0x3c) [0x564558bc0bec] array.c:2740
/usr/local/ruby/bin/ruby(vm_call_cfunc_with_frame+0x135) [0x564558aaf4a5] vm_insnhelper.c:3293
/usr/local/ruby/bin/ruby(vm_exec_core+0x184a) [0x564558ac4b9a] vm_insnhelper.c:5117
/usr/local/ruby/bin/ruby(rb_vm_exec+0xcb) [0x564558ab1f2b] vm.c:2438
/usr/local/ruby/bin/ruby(vm_call0_body+0x4a3) [0x564558aba233] vm_eval.c:206
/usr/local/ruby/bin/ruby(rb_call0+0x223) [0x564558abdb43] vm_eval.c:87
/usr/local/ruby/bin/ruby(rb_funcallv_kw+0x3e) [0x564558abe5ee] vm_eval.c:876
/usr/local/ruby/bin/ruby(rb_class_new_instance_pass_kw+0x63) [0x56455897a523] object.c:2021
/usr/local/ruby/bin/ruby(vm_call_cfunc_with_frame+0x135) [0x564558aaf4a5] vm_insnhelper.c:3293
/usr/local/ruby/bin/ruby(vm_call_method_each_type+0x79) [0x564558ab3539] vm_insnhelper.c:3945
/usr/local/ruby/bin/ruby(vm_call_method+0xc4) [0x564558ab4044] vm_insnhelper.c:4095
/usr/local/ruby/bin/ruby(vm_exec_core+0x1c8) [0x564558ac3518] vm_insnhelper.c:5117
/usr/local/ruby/bin/ruby(rb_vm_exec+0xcb) [0x564558ab1f2b] vm.c:2438
/usr/local/ruby/bin/ruby(rb_yield+0x25e) [0x564558ab774e] vm.c:1451
/usr/local/ruby/bin/ruby(rb_ary_each+0x3c) [0x564558bc0bec] array.c:2740
/usr/local/ruby/bin/ruby(vm_call_cfunc_with_frame+0x135) [0x564558aaf4a5] vm_insnhelper.c:3293
/usr/local/ruby/bin/ruby(vm_exec_core+0x184a) [0x564558ac4b9a] vm_insnhelper.c:5117
/usr/local/ruby/bin/ruby(rb_vm_exec+0xcb) [0x564558ab1f2b] vm.c:2438
/usr/local/ruby/bin/ruby(rb_yield+0x25e) [0x564558ab774e] vm.c:1451
/usr/local/ruby/bin/ruby(rb_ary_each+0x3c) [0x564558bc0bec] array.c:2740
/usr/local/ruby/bin/ruby(vm_call_cfunc_with_frame+0x135) [0x564558aaf4a5] vm_insnhelper.c:3293
/usr/local/ruby/bin/ruby(vm_exec_core+0x184a) [0x564558ac4b9a] vm_insnhelper.c:5117
/usr/local/ruby/bin/ruby(rb_vm_exec+0xcb) [0x564558ab1f2b] vm.c:2438
/usr/local/ruby/bin/ruby(rb_vm_invoke_proc+0x33) [0x564558ab9d43] vm.c:1656
/usr/local/ruby/bin/ruby(thread_do_start_proc+0x176) [0x564558a65ea6] thread.c:595
/usr/local/ruby/bin/ruby(thread_start_func_2+0x49c) [0x564558a68dcc] thread.c:614
/usr/local/ruby/bin/ruby(thread_start_func_1+0xe1) [0x564558a697c1] thread_pthread.c:1173
/lib/x86_64-linux-gnu/libpthread.so.0(start_thread+0xd9) [0x7fc42e366609]
/lib/x86_64-linux-gnu/libc.so.6(clone+0x43) [0x7fc42e270133]

Metadata

Metadata

Assignees

No one assigned

    Labels

    No labels
    No labels

    Type

    No type

    Projects

    No projects

    Milestone

    No milestone

    Relationships

    None yet

    Development

    No branches or pull requests

    Issue actions