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Bug #17382

Segfault in String#inspect

Added by lionelperrin (Lionel Perrin) 3 months ago. Updated 3 months ago.

Status:
Open
Priority:
Normal
Assignee:
-
Target version:
-
ruby -v:
ruby 2.7.2p137 (2020-10-01 revision 5445e04352) [x86_64-linux]
[ruby-core:101343]

Description

Hello,

We experienced a segfault in our application. It seems that it happened right after we've upgraded from ruby 2.6 to ruby 2.7.2.
The faulting ruby code is actionpack-6.0.3.4/lib/action_controller/log_subscriber.rb:16:

info "  Parameters: #{params.inspect}" unless params.empty?

However, the problem seems to be due to string.c:10702

Here is an extract of the output from ruby (full output attached):

-- Control frame information -----------------------------------------------
c:0073 p:---- s:0500 e:000499 CFUNC  :inspect
c:0072 p:---- s:0497 e:000496 CFUNC  :inspect
c:0071 p:0137 s:0493 e:000490 METHOD /usr/app/rubygems/ruby/2.7.0/gems/actionpack-6.0.3.4/lib/action_controller/log_subscriber.rb:16
c:0070 p:0038 s:0483 e:000482 METHOD /usr/app/rubygems/ruby/2.7.0/gems/activesupport-6.0.3.4/lib/active_support/subscriber.rb:145
...
-- Ruby level backtrace information ----------------------------------------
/usr/app/rubygems/ruby/2.7.0/gems/puma-5.0.4/lib/puma/thread_pool.rb:145:in `block in spawn_thread'
/usr/app/rubygems/ruby/2.7.0/gems/puma-5.0.4/lib/puma/server.rb:430:in `process_client'
/usr/app/rubygems/ruby/2.7.0/gems/puma-5.0.4/lib/puma/request.rb:75:in `handle_request'
...
-- Machine register context ------------------------------------------------
 RIP: 0x00007fd7ab8b0f5c RBP: 0x00007fd7844b92c8 RSP: 0x00007fd7a4af7fe0
 RAX: 0x00005597fb1672c0 RBX: 0x0000000000000000 RCX: 0x00007fd7ab8b1060
 RDX: 0x0000000000000000 RDI: 0x0000000000000000 RSI: 0x0000000000000000
  R8: 0x00007fd7a4bf8d50  R9: 0x00005597ffce6378 R10: 0x0000000055550083
 R11: 0x0000000000000000 R12: 0x0000000000000000 R13: 0x00005597fb1b0038
 R14: 0x00005597fb1672c0 R15: 0x0000000000000000 EFL: 0x0000000000010206
-- C level backtrace information -------------------------------------------
/usr/local/lib/libruby.so.2.7(rb_vm_bugreport+0x555) [0x7fd7ab9176f5] vm_dump.c:755
[0x7fd7ab756427]
/usr/local/lib/libruby.so.2.7(sigsegv+0x4b) [0x7fd7ab88311b] signal.c:946
/lib/x86_64-linux-gnu/libpthread.so.0(__restore_rt+0x0) [0x7fd7ab45f730]
/usr/local/lib/libruby.so.2.7(rb_str_symname_p+0x1c) [0x7fd7ab8b0f5c] string.c:10702
/usr/local/lib/libruby.so.2.7(sym_inspect+0x1a) [0x7fd7ab8b107a] string.c:10761
[0x7fd7ab909271]
/usr/local/lib/libruby.so.2.7(rb_funcallv_with_cc+0x118) [0x7fd7ab90bb68] vm_eval.c:1013

Files

ruby_segfault_log.txt (86.2 KB) ruby_segfault_log.txt lionelperrin (Lionel Perrin), 12/09/2020 03:32 PM

Related issues

Related to Ruby master - Bug #17289: Time#strftime occurs Segmentation Fault on ruby-2.7.2p137Assignedshyouhei (Shyouhei Urabe)Actions
Related to Ruby master - Bug #17362: Thread core dumpFeedbackActions

Updated by mame (Yusuke Endoh) 3 months ago

Thank you for the report. I think that this is the same issue as #17289 and #17362. Unfortunately, the core team has no reproducible code, so we haven't investigated the issue yet. Can you provide your code, or at least, the core dump file?

#2

Updated by mame (Yusuke Endoh) 3 months ago

  • Related to Bug #17289: Time#strftime occurs Segmentation Fault on ruby-2.7.2p137 added
#3

Updated by mame (Yusuke Endoh) 3 months ago

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