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git-fetch segfault in git 1.5.5.1

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From: Dave Jones
Subject: git-fetch segfault in git 1.5.5.1
Date: Monday, April 28, 2008 - 11:41 am

Since master.kernel.org updated to latest, I noticed that I could crash
git-fetch by doing this..

export KERNEL=/pub/scm/linux/kernel/git/
git fetch $KERNEL/torvalds/linux-2.6 master:linus

(gdb) bt
#0  0x000000349fd6d44b in free () from /lib64/libc.so.6
#1  0x000000000048f4eb in transport_unlock_pack (transport=0x7ce530) at transport.c:811
#2  0x000000349fd31b25 in exit () from /lib64/libc.so.6
#3  0x00000000004043d8 in handle_internal_command (argc=3, argv=0x7fffea4449f0) at git.c:379
#4  0x0000000000404547 in main (argc=3, argv=0x7fffea4449f0) at git.c:443
#5  0x000000349fd1c784 in __libc_start_main () from /lib64/libc.so.6
#6  0x0000000000403ef9 in ?? ()
#7  0x00007fffea4449d8 in ?? ()
#8  0x0000000000000000 in ?? ()

I then remembered, my .bashrc has this..

export MALLOC_PERTURB_=$(($RANDOM % 255 + 1))

which is handy for showing up such bugs.

More info on this glibc feature is at http://udrepper.livejournal.com/11429.html

	Dave

-- 
http://www.codemonkey.org.uk
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Messages in current thread:
git-fetch segfault in git 1.5.5.1, Dave Jones, (Mon Apr 28, 11:41 am)
[PATCH] Fix use after free() in builtin-fetch, Alex Riesen, (Mon Apr 28, 1:23 pm)
Re: [PATCH] Fix use after free() in builtin-fetch, Junio C Hamano, (Tue Apr 29, 12:30 am)