Re: reproducible bug in 2.2.19 & 2.4.x

From: Balazs Scheidler (bazsi@balabit.hu)
Date: Tue Oct 02 2001 - 03:31:12 EST

Next message: Stelian Pop: "Re: [PATCH] PnPBIOS 2.4.9-ac1[56] Vaio fix"
Previous message: Matti Aarnio: "Re: 'dd' local works, but not over net, help as to why?"
Messages sorted by: [ date ] [ thread ] [ subject ] [ author ]

On Fri, Sep 28, 2001 at 01:01:38PM +0200, Balazs Scheidler wrote:
> I added a backtrace function to my test program to show where it
> aborts, and here's the result:
>
> Signal (11) received, stackdump follows; eax='ffffffe0', ebx='0000000c', ecx='be5ff96c', edx='00000400', eip='00000001'
> retaddr=0x1, ebp=0xbe5ff944
> retaddr=0x804892a, ebp=0xbe5ffd74
> retaddr=0x4001bc9f, ebp=0xbe5ffe34
>
> The program _always_ aborted at eip=0x1.
>
> the program didn't abort if I removed the syslog() function call from the
> thread.

I received an idea, suggesting that syslog() is not reentrant and this
causes problems.

I added mutexes around my syslog call and the problem still occurs, although
slower.

I'm trying to remove syslog() and add some sigaction calls instead (which I
think is the culprit) I attach my modified stressthreads.c

-- Bazsi PGP info: KeyID 9AF8D0A9 Fingerprint CD27 CFB0 802C 0944 9CFD 804E C82C 8EB1

text/x-csrc attachment: stressthreads.c

- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/

Next message: Stelian Pop: "Re: [PATCH] PnPBIOS 2.4.9-ac1[56] Vaio fix"
Previous message: Matti Aarnio: "Re: 'dd' local works, but not over net, help as to why?"
Messages sorted by: [ date ] [ thread ] [ subject ] [ author ]

This archive was generated by hypermail 2b29 : Sun Oct 07 2001 - 21:00:18 EST