[FIXED] Crashes in multiplayer due to invalid memory access

[mbenatto]

Hello,

 

I have been facing crashes when playing on MP servers. I could not really determine the specific steps to reproduce, but usually happens when

engaging bandits. The most reliable server to reproduce it 'til now was the Growling Sidewinder server.

 

Looking at the attached log it seems it's dereferencing some invalid pointer at the EFM debug handler as shown on the stack trace bellow:

 

2020-12-15 00:34:50.123 INFO    EDCORE: # -------------- 20201215-003450 --------------
2020-12-15 00:34:50.223 INFO    EDCORE: DCS/2.5.6.58125 (x86_64; Windows NT 10.0.18363)
2020-12-15 00:34:50.279 INFO    EDCORE: D:\DCS World OpenBeta\Mods\aircraft\JF-17\bin\JF-17_ASM.dll
2020-12-15 00:34:50.309 INFO    EDCORE: # C0000005 ACCESS_VIOLATION at 7C402FD8 00:00000000
2020-12-15 00:34:50.436 INFO    EDCORE: SymInit: Symbol-SearchPath: '.;D:\DCS World OpenBeta;D:\DCS World OpenBeta\bin;C:\Windows;C:\Windows\system32;SRV*C:\websymbols*http://msdl.microsoft.com/download/symbols;', symOptions: 530, UserName: 'User'
2020-12-15 00:34:50.465 INFO    EDCORE: OS-Version: 10.0.18363 () 0x100-0x1
2020-12-15 00:34:55.634 INFO    EDCORE: 0x00000000001D2FD8 (JF-17_ASM): ed_fm_debug_watch + 0xED38
2020-12-15 00:34:55.680 INFO    EDCORE: 0x00000000001CE91E (JF-17_ASM): ed_fm_debug_watch + 0xA67E
2020-12-15 00:34:55.681 INFO    EDCORE: 0x0000000000003B94 (World): wSimTrace::CommandsTraceDiscreteIsOn + 0x504
2020-12-15 00:34:55.682 INFO    EDCORE: 0x000000000000403D (World): wSimCalendar::DoActionsUntil + 0x1FD
2020-12-15 00:34:55.682 INFO    EDCORE: 0x00000000007DCBDF (DCS): CoreUtils::TempFilesManager::operator= + 0x3B8D2F
2020-12-15 00:34:55.682 INFO    EDCORE: 0x00000000007EF7E3 (DCS): CoreUtils::TempFilesManager::operator= + 0x3CB933
2020-12-15 00:34:55.683 INFO    EDCORE: 0x00000000007C1644 (DCS): CoreUtils::TempFilesManager::operator= + 0x39D794
2020-12-15 00:34:55.683 INFO    EDCORE: 0x00000000007C1A09 (DCS): CoreUtils::TempFilesManager::operator= + 0x39DB59
2020-12-15 00:34:55.683 INFO    EDCORE: 0x00000000017B4353 (DCS): AmdPowerXpressRequestHighPerformance + 0xB0B34F
2020-12-15 00:34:55.684 INFO    EDCORE: 0x00000000009AE5FE (DCS): CoreUtils::TempFilesManager::operator= + 0x58A74E
2020-12-15 00:34:55.684 INFO    EDCORE: 0x0000000000017C24 (KERNEL32): BaseThreadInitThunk + 0x14
2020-12-15 00:34:55.684 INFO    EDCORE: 0x000000000006D4D1 (ntdll): RtlUserThreadStart + 0x21
2020-12-15 00:35:05.627 INFO    EDCORE: Minidump created.

 

I had around 6 of it until now, all in the same path.

I'm attaching the most recent crash dump, I can't upload the .trk file as it has 33MB.

If you provide me someplace to upload it, I'm glad to do so.

Also I think I recorded the crash in video, but I really need to confirm it.

dcs.log-20201215-003450.zip

[L0op8ack]

Will you upload .trk to google driver?

we need reproduce to dig what's goning on.

[mbenatto]

I'll try it later, I'm with no space on my drive but I'll make sure I could upload it in some public sharing and let you know.

[L0op8ack]

I'm digging into it, this may take some time.

thanks for report.

 

update: my fault, fixed!

 

[mbenatto]

Many many thanks for quick looking into this!

I hope the report helped, you don't need to necessarily disclose the issue but I hope I directed you to the right place. 

[Kerbo 416]

On 12/15/2020 at 5:13 PM, L0op8ack said:

I'm digging into it, this may take some time.

thanks for report.

 

update: my fault, fixed!

 

so the fix will be coming in the next OB update? 

[uboats]

3 minutes ago, Kerbo 416 said:

so the fix will be coming in the next OB update? 

yes, it should be.

fortunately, ED merged it (submit after deadline) into build for tomorrow update.

[Kerbo 416]

1 minute ago, uboats said:

yes, it should be.

fortunately, ED merged it (submit after deadline) into build for tomorrow update.

Good to hear! thanks for the quick reply Uboats