[lfs-dev] 'ls -l' segfaults on Athlon XP

Pierre Labastie pierre.labastie at neuf.fr
Sun Feb 22 10:06:15 PST 2015


Le 22/02/2015 19:00, Pierre Labastie a écrit :
> Le 22/02/2015 17:08, Christoph Feikes a écrit :
>> Hello,
>>
>> I'm trying to build LFS according to current 7.7-rc1.
>> 'ls -l' on a non-empty directory segfaults on Athlon XP as soon as a ls
>> linked against glibc-2.21 gets installed. When using glibc-2.20 on the
>> Athlon, all other parameters unchanged, no segfault occurs.
>>
>> log entry: kernel: ls[15030]: segfault at 0 ip b76652a4 sp bfe82570
>> error 6 in libc-2.21.so[b75ed000+1af000]
>>
>> The segfault happens, when in coreutils-8.23/src/ls.c the function
>> align_nstrftime() (line 3663) gets executed, the pointer pfmt returned
>> from a call to mempcpy() with 0 count to copy points to a bogus address,
>> and stpcpy() is called with this pointer as a destination address (lines
>> 3678, 3679).
>>
>> I'm suspecting a bug in glibc, specifically in the area of
>> sysdeps/i386/i686/multiarch, but so far I wasn't able to find it. I
>> admit I hardly know intel assembler, especially not the unix version.
>>
>> Kind regards,
>> Christoph
>>
>>
>>
> There seem to be a patch on archlinux, which touches exactly the area you say:
> https://projects.archlinux.org/svntogit/packages.git/tree/trunk/glibc-2.21-roundup.patch?h=packages/glibc
> sorry for the broken line.
> Would it solve your problem?
> Pierre
> 
Also on glibc site:
https://sourceware.org/git/?p=glibc.git;a=patch;h=132a1328eccd20621b77f7810eebbeec0a1af187

(again only one line). Looks like this is only for non SSE2
CPUs.
Pierre


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