Re: __stack_chk_fail?
Re: __stack_chk_fail?
- Subject: Re: __stack_chk_fail?
- From: Jean-Daniel Dupas <email@hidden>
- Date: Mon, 14 Feb 2011 16:19:30 +0100
It does not prevent buffer overflow, it generate check in each function to abort when one is detected.
This is exactly what append here, __stack_chk_fail is the call inserted by GCC to check the stack and abort if it is corrupted.
Le 14 févr. 2011 à 16:15, claw a écrit :
> GCC has an option to prevent "buffer overflow protection" you can use it with compiler option :
>
> -fstack-protector / -fno-stack-protector
>
>
> Le 14 févr. 2011 à 16:05, Jean-Daniel Dupas a écrit :
>
>> Le 14 févr. 2011 à 16:00, sebi a écrit :
>>
>>> Hello,
>>>
>>> I'm writing an mp3 file renamer that uses the id3lib. Somewhere in the id3lib code my app crashes with SIGABRT when trying to return from a function* showing "__stack_chk_fail" in the debugger's stack trace pane. This happens when I use GCC 4.2 as compiler. When I use LLVM GCC 4.2 my application runs just fine. Neither clang nor GuardMalloc show any problems at compile- or runtime.
>>> I'm using Xcode 3.2.5 on Mac OS 10.6.6.
>>> Does someone have an idea what could be the problem here?
>>>
>>> Thanks and regards,
>>> Sebastian Mecklenburg
>>
>> This is a stack corruption error. You're probably writing past the end of a stack buffer and corrupt your stack.
>> I'm not sure llvm-gcc 4.2 properly supports this feature (that would explain why it run fine when using llvm-gcc), or it may simply order variables on the stack in a way that prevent the overflow detection.
>> Anyway, you should check your function to find why the stack is corrupted when it returns.
>>
>>
>> -- Jean-Daniel
>>
>>
>>
>>
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-- Jean-Daniel
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