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Bug#902678: unsub_copy: segfault at 0 ip error 4 in libc-2.19.so



control: tag -1 + moreinfo

On 2018-06-29 14:19, Arkadiusz Zug wrote:
> Package: reportbug
> Version: 6.6.3+deb8u1
> Severity: normal
> 
> Dear Maintainer,
> 
>    * What led up to the situation?
>     Answer: don't know, nothing new was installed
> 
>    * What exactly did you do (or not do) that was effective (or
>      ineffective)?
>     Answer: nothing cause cannot find solution google don't know what is "unsub_copy"
> 
>    * What was the outcome of this action?
> 
>    * What outcome did you expect instead?
> 
> Problem: Since few days ago I found in the kern.log / messages.log and syslog below lines:
> 
> These lines appear randomly like below example,

Do you only have the problem with "unsub_copy", or do you also have
other programs crashing the same way? Can you tell us what is
"unsub_copy", it doesn't appear to be something shipped by debian.

> Jun 29 14:09:09 backup kernel: [3132191.949481] unsub_copy[10238]: segfault at 0 ip 00007fa8e46695e4 sp 00007ffe8a7709a0 error 4 in libc-2.19.so[7fa8e4600000+1a1000]

This address correspond to the _IO_fclose function (corresponding to
fclose) and happens when the first argument, the pointer to the FILE
structure, is dereferenced. This pointer is NULL, so it doesn't seems to
be a bug in glibc.

Aurelien

-- 
Aurelien Jarno                          GPG: 4096R/1DDD8C9B
aurelien@aurel32.net                 http://www.aurel32.net


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