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Re: test-getlogin_r segfaults with glibc 2.12
From: |
Richard W.M. Jones |
Subject: |
Re: test-getlogin_r segfaults with glibc 2.12 |
Date: |
Wed, 5 May 2010 23:13:46 +0100 |
User-agent: |
Mutt/1.5.18 (2008-05-17) |
On Wed, May 05, 2010 at 04:35:49PM +0100, Richard W.M. Jones wrote:
> Program received signal SIGSEGV, Segmentation fault.
> 0x00007ffff7ae77fe in __strncpy_sse2 (s1=<value optimized out>,
> s2=<value optimized out>, n=<value optimized out>) at ./strncpy.c:83
> 83 *++s1 = '\0';
> (gdb) bt
> #0 0x00007ffff7ae77fe in __strncpy_sse2 (s1=<value optimized out>,
> s2=<value optimized out>, n=<value optimized out>) at ./strncpy.c:83
> #1 0x00007ffff7b071d2 in __getlogin_r_loginuid (name=0x7fffffffda90
> "rjones",
> namesize=0) at ../sysdeps/unix/sysv/linux/getlogin_r.c:84
> #2 0x00007ffff7b07299 in getlogin_r (name=0x7fffffffda90 "rjones",
> namesize=0)
> at ../sysdeps/unix/sysv/linux/getlogin_r.c:103
> #3 0x0000000000400948 in getlogin_r (__buflen=<value optimized out>,
> __buf=<value optimized out>) at /usr/include/bits/unistd.h:323
> #4 main (__buflen=<value optimized out>, __buf=<value optimized out>)
> at test-getlogin_r.c:76
It turned out the segfault was due to a bug in glibc itself,
which is now fixed upstream:
http://sourceware.org/bugzilla/show_bug.cgi?id=11571
Rich.
--
Richard Jones, Virtualization Group, Red Hat http://people.redhat.com/~rjones
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