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Fix segmentation fault of Pathname#split when File.split returns non array value [Bug #17755] #4

Merged
merged 2 commits into from
Mar 28, 2021
Merged

Fix segmentation fault of Pathname#split when File.split returns non array value [Bug #17755] #4

merged 2 commits into from
Mar 28, 2021

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@kachick kachick commented Mar 27, 2021 •
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ref: https://bugs.ruby-lang.org/issues/17755

require 'pathname'

mod = Module.new do
  def split(_arg)
  end
end

File.singleton_class.prepend(mod)

Pathname('/').split

This code make segmentation fault.

-:10: [BUG] Segmentation fault at 0x0000000000000008
ruby 3.0.0p0 (2020-12-25 revision 95aff21468) [x86_64-darwin20]

Process:               ruby [58439]
Path:                  /Users/USER/*/ruby
Identifier:            ruby
Version:               0
Code Type:             X86-64 (Native)
Parent Process:        zsh [53848]
Responsible:           iTerm2 [775]
User ID:               501

Date/Time:             2021-03-27 15:46:16.534 +0900
OS Version:            macOS 11.2.3 (20D91)
Report Version:        12
Bridge OS Version:     5.2 (18P4347)
Anonymous UUID:        45AC3339-EF82-D14F-C1BE-DDCB9F9108C6

Sleep/Wake UUID:       E1F50CA2-5DC3-4ED1-AF17-7C63DE26EDF9

Time Awake Since Boot: 300000 seconds
Time Since Wake:       6000 seconds

System Integrity Protection: enabled

Crashed Thread:        0  Dispatch queue: com.apple.main-thread

Exception Type:        EXC_BAD_ACCESS (SIGABRT)
Exception Codes:       KERN_INVALID_ADDRESS at 0x0000000000000008
Exception Note:        EXC_CORPSE_NOTIFY

VM Regions Near 0x8:
--> 
    __TEXT                      10e0e0000-10e42c000    [ 3376K] r-x/r-x SM=COW  /Users/*

Application Specific Information:
abort() called

Thread 0 Crashed:: Dispatch queue: com.apple.main-thread
0   libsystem_kernel.dylib        	0x00007fff203fd462 __pthread_kill + 10
1   libsystem_pthread.dylib       	0x00007fff2042b610 pthread_kill + 263
2   libsystem_c.dylib             	0x00007fff2037e720 abort + 120
3   ruby                          	0x000000010e18e3e9 die + 9 (error.c:750)
4   ruby                          	0x000000010e18e619 rb_bug_for_fatal_signal + 553 (error.c:790)
5   ruby                          	0x000000010e2cca7b sigsegv + 91 (signal.c:960)
6   libsystem_platform.dylib      	0x00007fff2046fd7d _sigtramp + 29
7   ???                           	000000000000000000 0 + 0
8   pathname.bundle               	0x000000010e63ffd7 path_split + 119 (pathname.c:838)
9   ruby                          	0x000000010e36b05f vm_call_cfunc_with_frame + 335 (vm_insnhelper.c:2898)
10  ruby                          	0x000000010e362f3c vm_sendish + 1324
11  ruby                          	0x000000010e348e70 vm_exec_core + 15920 (insns.def:789)
12  ruby                          	0x000000010e35da29 rb_vm_exec + 2873
13  ruby                          	0x000000010e199787 rb_ec_exec_node + 295 (eval.c:317)
14  ruby                          	0x000000010e199607 ruby_run_node + 87 (eval.c:375)
15  ruby                          	0x000000010e0e16fd main + 93 (main.c:50)
16  libdyld.dylib                 	0x00007fff20446621 start + 1

Thread 1:
0   libsystem_kernel.dylib        	0x00007fff203fd4fe poll + 10
1   ruby                          	0x000000010e318e2e timer_pthread_fn + 158 (thread_pthread.c:2189)
2   libsystem_pthread.dylib       	0x00007fff2042b950 _pthread_start + 224
3   libsystem_pthread.dylib       	0x00007fff2042747b thread_start + 15

Thread 0 crashed with X86 Thread State (64-bit):
  rax: 0x0000000000000000  rbx: 0x000000010e8e1e00  rcx: 0x00007f8f000d2fd8  rdx: 0x0000000000000000
  rdi: 0x0000000000000307  rsi: 0x0000000000000006  rbp: 0x00007f8f000d3000  rsp: 0x00007f8f000d2fd8
   r8: 0x00000000000130a8   r9: 0x00007fff88a65da8  r10: 0x000000010e8e1e00  r11: 0x0000000000000246
  r12: 0x0000000000000307  r13: 0x00007fff88a65f80  r14: 0x0000000000000006  r15: 0x0000000000000016
  rip: 0x00007fff203fd462  rfl: 0x0000000000000246  cr2: 0x0000000109e24000
  
Logical CPU:     0
Error Code:      0x02000148
Trap Number:     133

Thread 0 instruction stream:
  29 c9 4b 8d 0c fa 4e 8d-24 c9 4c 89 e7 48 89 c2  ).K...N.$.L..H..
  e8 fb 21 2a 00 4c 8b 43-18 4c 89 e6 4c 89 f8 48  ..!*.L.C.L..L..H
  f7 d8 48 8d 04 c6 48 89-43 20 e9 0e ff ff ff 48  ..H...H.C .....H
  89 df e8 25 ee 0a 00 48-8d 05 36 0c 36 00 48 8b  ...%...H..6.6.H.
  38 48 8d 35 6d 31 2a 00-31 c0 e8 bd 9a 0a 00 bf  8H.5m1*.1.......
  08 00 00 00 48 89 ce e8-40 dd 0c 00 55 48 89 e5  ....H...@...UH..
 [48]8b 0f f7 c1 00 20 00-00 75 14 48 8b 4f 10 48  H..... ..u.H.O.H	<==
  8b 7f 20 b8 08 00 00 00-48 85 c9 75 16 5d c3 c1  .. .....H..u.]..
  e9 0f 83 e1 03 48 83 c7-10 b8 08 00 00 00 48 85  .....H........H.
  c9 74 ea 48 85 f6 78 07-48 39 f1 7e e0 eb 05 48  .t.H..x.H9.~...H
  01 ce 78 d9 48 8b 04 f7-5d c3 66 90 55 48 89 e5  ..x.H...].f.UH..
  41 57 41 56 41 55 41 54-53 48 83 ec 18 49 89 ce  AWAVAUATSH...I..
  
Thread 0 last branch register state not available.


Binary Images:
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External Modification Summary:
  Calls made by other processes targeting this process:
    task_for_pid: 0
    thread_create: 0
    thread_set_state: 0
  Calls made by this process:
    task_for_pid: 0
    thread_create: 0
    thread_set_state: 0
  Calls made by all processes on this machine:
    task_for_pid: 319742
    thread_create: 0
    thread_set_state: 0

VM Region Summary:
ReadOnly portion of Libraries: Total=575.5M resident=0K(0%) swapped_out_or_unallocated=575.5M(100%)
Writable regions: Total=119.4M written=0K(0%) resident=0K(0%) swapped_out=0K(0%) unallocated=119.4M(100%)
 
                                VIRTUAL   REGION 
REGION TYPE                        SIZE    COUNT (non-coalesced) 
===========                     =======  ======= 
Activity Tracing                   256K        1 
Kernel Alloc Once                    8K        1 
MALLOC                            90.1M       29 
MALLOC guard page                   16K        4 
STACK GUARD                          4K        1 
Stack                             8712K        2 
Stack Guard                       56.0M        1 
VM_ALLOCATE                       20.3M       66 
__DATA                            2602K      148 
__DATA_CONST                      6453K      101 
__DATA_DIRTY                       289K       59 
__LINKEDIT                       490.4M       14 
__OBJC_RO                         60.5M        1 
__OBJC_RW                         2449K        2 
__TEXT                            85.2M      150 
__UNICODE                          588K        1 
mapped file                       9176K        2 
shared memory                        8K        2 
===========                     =======  ======= 
TOTAL                            832.4M      585

@kachick kachick changed the title Fix segmentation fault of Pathname#split when File.split returns non array value Fix segmentation fault of Pathname#split when File.split returns non array value [Bug #17755] Mar 27, 2021
@nobu nobu merged commit f169986 into ruby:master Mar 28, 2021
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kachick commented Mar 28, 2021

Thank you!

@kachick kachick deleted the fix-segv-when-file-split-returns-non-array branch March 28, 2021 04:23
@kachick kachick mentioned this pull request Mar 30, 2021
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@kachick kachick mentioned this pull request Jun 26, 2022
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@kachick @Kattegory @nobu