[HarryPotter]

Recently, well, I think after the last l4d1 update (Left 4 Dead - Update 2022/2/1),
the server crashes one time a day, most cases happen when map changes or second round starts on versus mode and the map is Dead Before Dawn Map 5.

I test windows and linux, they both have crash log.
(all versus mode)

Linux: 7Z3D-VNSL-ENTP
engine.so!CM_VCollideForModel(int, model_t const*) + 0x19

Spoiler

PHP Code:

SIGSEGV /SEGV_MAPERR accessing 0x6c

Thread 0 (crashed):
   0: engine.so!CM_VCollideForModel(int, model_t const*) + 0x19
      eip: 0xf6754432  esp: 0xffcc4ff0  ebp: 0x00000000  ebx: 0xf6979a20
      esi: 0x11883b68  edi: 0x00000000  eax: 0x00000000  ecx: 0x00000000
      edx: 0x00000000  efl: 0x00210292  

      f675441c  83 ec 10           sub esp, 0x10
      f675441f  e8 56 49 f8 ff     call 0xf66d8d7a
      f6754424  81 c3 fc 55 22 00  add ebx, 0x2255fc
      f675442a  8b 4c 24 20        mov ecx, [esp+0x20]
      f675442e  8b 54 24 24        mov edx, [esp+0x24]
  >   f6754432  8b 42 6c           mov eax, [edx+0x6c]
      f6754435  83 f8 01           cmp eax, 0x1
      f6754438  74 30              jz 0xf675446a
      f675443a  83 f8 03           cmp eax, 0x3
      f675443d  74 09              jz 0xf6754448
      f675443f  31 c0              xor eax, eax

      ffcc4ff0  f0 39 88 11 40 69 4e 10  dc 69 4e 10 20 9a 97 f6  .9..@iN..iN. ...
      ffcc5000  20 9a 97 f6 68 3b 88 11  00 00 00 00 93 8c 79 f6   ...h;........y.

      Found via instruction pointer in context


   1: engine.so!CEngineTrace::ClipRayToVPhysics(Ray_t const&, unsigned int, ICollideable*, studiohdr_t*, CGameTrace*) + 0x11d
      eip: 0xf6798c93  esp: 0xffcc5010  ebp: 0x00000000  ebx: 0xf6979a20
      esi: 0x11883b68  edi: 0x00000000  

      ffcc5010  00 00 00 00 00 00 00 00  0b 42 02 02 20 9a 97 f6  .........B.. ...
      ffcc5020  30 ed cc f5 6c 27 7d f6  90 4c c1 f5 5b 01 42 f5  0...l'}..L..[.B.
      ffcc5030  a4 e3 9c f6 00 00 00 00  00 00 00 00 24 0b aa f6  ............$...
      ffcc5040  90 4c c1 f5 70 61 cc ff  1c 61 cc ff 28 99 24 f5  .L..pa...a..(.$.
      ffcc5050  f0 39 88 11 00 00 00 00  01 00 00 00 20 9a 97 f6  .9.......... ...
      ffcc5060  70 61 cc ff 1c 61 cc ff  68 3b 88 11 9d 93 79 f6  pa...a..h;....y.

      Found via call frame info


   2: engine.so!CEngineTrace::ClipRayToCollideable(Ray_t const&, unsigned int, ICollideable*, CGameTrace*) + 0xe9
      eip: 0xf679939d  esp: 0xffcc5070  ebp: 0x11883b68  ebx: 0xf6979a20
      esi: 0xffcc6170  edi: 0xffcc611c  

      ffcc5070  e0 6e 9c f6 70 61 cc ff  0b 42 02 02 68 3b 88 11  .n..pa...B..h;..
      ffcc5080  00 00 00 00 1c 61 cc ff  00 00 00 00 06 00 00 00  .....a..........
      ffcc5090  f0 39 88 11 c8 61 cc ff  90 4c c1 f5 dc 8d 38 f5  .9...a...L....8.
      ffcc50a0  00 00 00 00 00 00 00 00  00 00 00 00 00 00 00 00  ................
      ffcc50b0  f0 39 88 11 0b 42 02 02  79 2e 73 6d 20 9a 97 f6  .9...B..y.sm ...
      ffcc50c0  01 00 00 00 f0 39 88 11  e0 6e 9c f6 44 9c 79 f6  .....9...n..D.y.

      Found via call frame info 


windows: 3ZVV-VGWX-NMSR
engine.dll + 0x1d024

Spoiler

PHP Code:

EXCEPTION_ACCESS_VIOLATION_READ accessing 0x6c

Thread 0 (crashed):
   0: engine.dll + 0x1d024
      eip: 0x0873d024  esp: 0x0019cbd8  ebp: 0x062397e4  ebx: 0x02024200
      esi: 0x00000000  edi: 0x062397e4  eax: 0x00000000  ecx: 0x06239680
      edx: 0x00000000  efl: 0x00210246  

      0873d016  83 c4 04        add esp, 0x4
      0873d019  a1 38 4d af 08  mov eax, [0x8af4d38]
      0873d01e  5e              pop esi
      0873d01f  c3              ret
      0873d020  8b 54 24 08     mov edx, [esp+0x8]
  >   0873d024  8b 42 6c        mov eax, [edx+0x6c]
      0873d027  83 e8 01        sub eax, 0x1
      0873d02a  74 1e           jz 0x873d04a
      0873d02c  83 e8 02        sub eax, 0x2
      0873d02f  74 03           jz 0x873d034
      0873d031  33 c0           xor eax, eax

      0019cbd8  f3 16 76 08                                       ..v.            

      Found via instruction pointer in context


   1: engine.dll + 0x416f3
      eip: 0x087616f3  esp: 0x0019cbdc  ebp: 0x062397e4  

      0019cbdc  00 00 00 00 00 00 00 00  e4 97 23 06 c0 cc 19 00  ..........#.....
      0019cbec  0b 42 02 02 70 cc 19 00  80 96 23 06 bf ac 73 08  .B..p.....#...s.

      Found via stack scanning


   2: engine.dll + 0x1acbf
      eip: 0x0873acbf  esp: 0x0019cbfc  ebp: 0x062397e4  

      0019cbfc  05 2b 76 08                                       .+v.            

      Found via stack scanning 


Edit: see post#7

[Dragokas]

I did it very quickly (for Linux only for now). Sorry, don't have much time.
Compile on your own with latest MemoryEx Fork and check.

[HarryPotter]

Originally Posted by Dragokas I did it very quickly (for Linux only for now). Sorry, don't have much time. Compile on your own with latest MemoryEx Fork and check.

I will test a week and report, big Thanks

[HarryPotter]

Originally Posted by Dragokas I did it very quickly (for Linux only for now). Sorry, don't have much time. Compile on your own with latest MemoryEx Fork and check.

uhh, what ?

[SM] Failed to load plugin "Fix_CM_VCollideForModel_Detour.smx": Plugin only supports Left 4 Dead 2..

[Dragokas]

Ahh, sorry, remove that protection.

[HarryPotter]

I download latest MemoryEx Fork and compile

l4d1 linux sm 1.10

L 03/18/2022 - 22:47:14: SourceMod error session started
L 03/18/2022 - 22:47:14: Info (map "l4d_vs_smalltown02_drainage") (file "/root/sv1/left4dead/addons/sourcemod/logs/errors_20220318.log")
L 03/18/2022 - 22:47:14: [Fix_CM_VCollideForModel_Detour.smx] Cannot find signature section 'CM_VCollideForModel'
L 03/18/2022 - 22:47:14: [Fix_CM_VCollideForModel_Detour.smx] Cannot find library of 'CM_VCollideForModel'
L 03/18/2022 - 22:47:14: [Fix_CM_VCollideForModel_Detour.smx] Cannot find signature section 'CM_VCollideForModel'
L 03/18/2022 - 22:47:14: [Fix_CM_VCollideForModel_Detour.smx] Cannot find pattern of 'CM_VCollideForModel'
L 03/18/2022 - 22:47:14: [SM] Exception reported: Failed to load "CM_VCollideForModel" address.
L 03/18/2022 - 22:47:14: [SM] Blaming: Fix_CM_VCollideForModel_Detour.smx
L 03/18/2022 - 22:47:14: [SM] Call stack trace:
L 03/18/2022 - 22:47:14: [SM]   [0] SetFailState
L 03/18/2022 - 22:47:14: [SM]   [1] Line 56, D:\L4D new Server 2021\left4dead\addons\sourcemod\scripting 1.10\Fix_CM_VCollideForModel_Detour.sp::LoadPatchInfo
L 03/18/2022 - 22:47:14: [SM]   [2] Line 103, D:\L4D new Server 2021\left4dead\addons\sourcemod\scripting 1.10\Fix_CM_VCollideForModel_Detour.sp::MemoryEx_InitPEB
L 03/18/2022 - 22:47:14: [SM]   [4] Call_Finish
L 03/18/2022 - 22:47:14: [SM]   [5] Line 97, D:\L4D new Server 2021\left4dead\addons\sourcemod\scripting 1.10\include\MemoryEx/ServerLibrary.inc::MemoryExInit
L 03/18/2022 - 22:47:14: [SM]   [6] Line 74, D:\L4D new Server 2021\left4dead\addons\sourcemod\scripting 1.10\include\MemoryEx/ServerLibrary.inc::CheckInitPEB
L 03/18/2022 - 22:47:14: [SM]   [7] Line 48, D:\L4D new Server 2021\left4dead\addons\sourcemod\scripting 1.10\Fix_CM_VCollideForModel_Detour.sp::OnPluginStart
L 03/18/2022 - 22:56:52: Error log file session closed.
L 03/18/2022 - 22:56:52: SourceMod error session started
L 03/18/2022 - 22:56:52: Info (map "l4d_vs_smalltown03_ranchhouse") (file "/root/sv1/left4dead/addons/sourcemod/logs/errors_20220318.log")
L 03/18/2022 - 22:56:52: [Fix_CM_VCollideForModel_Detour.smx] Cannot find signature section 'CM_VCollideForModel'
L 03/18/2022 - 22:56:52: [Fix_CM_VCollideForModel_Detour.smx] Cannot find library of 'CM_VCollideForModel'
L 03/18/2022 - 22:56:52: [Fix_CM_VCollideForModel_Detour.smx] Cannot find signature section 'CM_VCollideForModel'
L 03/18/2022 - 22:56:52: [Fix_CM_VCollideForModel_Detour.smx] Cannot find pattern of 'CM_VCollideForModel'
L 03/18/2022 - 22:56:52: [SM] Exception reported: Failed to load "CM_VCollideForModel" address.
L 03/18/2022 - 22:56:52: [SM] Blaming: Fix_CM_VCollideForModel_Detour.smx
L 03/18/2022 - 22:56:52: [SM] Call stack trace:
L 03/18/2022 - 22:56:52: [SM]   [0] SetFailState
L 03/18/2022 - 22:56:52: [SM]   [1] Line 56, D:\L4D new Server 2021\left4dead\addons\sourcemod\scripting 1.10\Fix_CM_VCollideForModel_Detour.sp::LoadPatchInfo
L 03/18/2022 - 22:56:52: [SM]   [2] Line 103, D:\L4D new Server 2021\left4dead\addons\sourcemod\scripting 1.10\Fix_CM_VCollideForModel_Detour.sp::MemoryEx_InitPEB
L 03/18/2022 - 22:56:52: [SM]   [4] Call_Finish
L 03/18/2022 - 22:56:52: [SM]   [5] Line 97, D:\L4D new Server 2021\left4dead\addons\sourcemod\scripting 1.10\include\MemoryEx/ServerLibrary.inc::MemoryExInit
L 03/18/2022 - 22:56:52: [SM]   [6] Line 74, D:\L4D new Server 2021\left4dead\addons\sourcemod\scripting 1.10\include\MemoryEx/ServerLibrary.inc::CheckInitPEB
L 03/18/2022 - 22:56:52: [SM]   [7] Line 48, D:\L4D new Server 2021\left4dead\addons\sourcemod\scripting 1.10\Fix_CM_VCollideForModel_Detour.sp::OnPluginStart
L 03/18/2022 - 23:08:59: Error log file session closed.
L 03/18/2022 - 23:08:59: SourceMod error session started
L 03/18/2022 - 23:08:59: Info (map "l4d_vs_smalltown04_mainstreet") (file "/root/sv1/left4dead/addons/sourcemod/logs/errors_20220318.log")
L 03/18/2022 - 23:08:59: [Fix_CM_VCollideForModel_Detour.smx] Cannot find signature section 'CM_VCollideForModel'
L 03/18/2022 - 23:08:59: [Fix_CM_VCollideForModel_Detour.smx] Cannot find library of 'CM_VCollideForModel'
L 03/18/2022 - 23:08:59: [Fix_CM_VCollideForModel_Detour.smx] Cannot find signature section 'CM_VCollideForModel'
L 03/18/2022 - 23:08:59: [Fix_CM_VCollideForModel_Detour.smx] Cannot find pattern of 'CM_VCollideForModel'
L 03/18/2022 - 23:08:59: [SM] Exception reported: Failed to load "CM_VCollideForModel" address.
L 03/18/2022 - 23:08:59: [SM] Blaming: Fix_CM_VCollideForModel_Detour.smx
L 03/18/2022 - 23:08:59: [SM] Call stack trace:
L 03/18/2022 - 23:08:59: [SM]   [0] SetFailState
L 03/18/2022 - 23:08:59: [SM]   [1] Line 56, D:\L4D new Server 2021\left4dead\addons\sourcemod\scripting 1.10\Fix_CM_VCollideForModel_Detour.sp::LoadPatchInfo
L 03/18/2022 - 23:08:59: [SM]   [2] Line 103, D:\L4D new Server 2021\left4dead\addons\sourcemod\scripting 1.10\Fix_CM_VCollideForModel_Detour.sp::MemoryEx_InitPEB
L 03/18/2022 - 23:08:59: [SM]   [4] Call_Finish
L 03/18/2022 - 23:08:59: [SM]   [5] Line 97, D:\L4D new Server 2021\left4dead\addons\sourcemod\scripting 1.10\include\MemoryEx/ServerLibrary.inc::MemoryExInit
L 03/18/2022 - 23:08:59: [SM]   [6] Line 74, D:\L4D new Server 2021\left4dead\addons\sourcemod\scripting 1.10\include\MemoryEx/ServerLibrary.inc::CheckInitPEB
L 03/18/2022 - 23:08:59: [SM]   [7] Line 48, D:\L4D new Server 2021\left4dead\addons\sourcemod\scripting 1.10\Fix_CM_VCollideForModel_Detour.sp::OnPluginStart

[Dragokas]

Ok, fixed.
Download updated MemoryEx Fork. Same link.
Copy everything. Remove error logs. Reboot server.

[Dragokas]

Updated.
Windows is incuded in above post and tested.
Plugin and gamedata are updated.
Thanks for supporting me!

I think, Harry, you have crash because one of the entity models on server have empty name.
Try to enumerate everything and understand which entity class should have a model name but it doesn't have for some reason (perhaps, error in 3rd party plugin or something wrong with the metioned addon maps). Crash is triggering when one of players touch such entity. This may lead to other hidden issues as well.

[HarryPotter]

Originally Posted by Dragokas Crash is triggering when one of players touch such entity. This may lead to other hidden issues as well.

Interesting, I will find out and post here.
Thank you for your great fix.