-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 On 09/07/2011 04:01 AM, Jim Meyering wrote: > I was getting ready to release coreutils-8.13, after two > pre-release snapshots, > > http://thread.gmane.org/gmane.comp.gnu.coreutils.general/1554 > http://thread.gmane.org/gmane.comp.gnu.coreutils.general/1631 > > when I went to make sure its tests all pass also on rawhide. I test > that regularly, and they've all been passing (of course), so I > didn't expect any surprises. I certainly didn't expect 7 > failures, and never something as basic as this: > > $ touch a $ env -i /usr/bin/install a b zsh: segmentation fault > env -i /usr/bin/install a b [Exit 139 (SEGV)] > > [the "env -i " prefix is just to ensure that none of my > MALLOC_DEBUG_ or MALLOC_PERTURB_ settings (or any other envvar) is > causing trouble. ] > > gdb shows that it's officially a NULL-deref, but says there's a > "Corrupted DWARF expression", probably discovered in read_sleb128: > > $ env -i gdb -q --args /usr/bin/install a b Reading symbols from > /usr/bin/install...Reading symbols from > /usr/lib/debug/usr/bin/install.debug...done. done. (gdb) r Starting > program: /usr/bin/install a b [Thread debugging using libthread_db > enabled] Using host libthread_db library > "/lib64/libthread_db.so.1". > > Program received signal SIGSEGV, Segmentation fault. __strtok_r_1c > (__nextp=read_sleb128: Corrupted DWARF expression. ) at > /usr/include/bits/string2.h:1179 1179 while (*__s == __sep) > (gdb) p __s $1 = 0x0 (gdb) bt #0 __strtok_r_1c > (__nextp=read_sleb128: Corrupted DWARF expression. ) at > /usr/include/bits/string2.h:1179 #1 init (rec=0x626930, > opts=0x7ffff7fe2718, n=<optimized out>) at label_file.c:440 #2 > 0x00007ffff7bc4b3d in selabel_open (backend=0, > opts=0x7ffff7fe2718, nopts=5) at label.c:165 #3 0x00007ffff7bc3e16 > in matchpathcon_init_prefix_internal (path=0x0, subset=0x0) at > matchpathcon.c:321 #4 0x00007ffff7bc40a9 in matchpathcon > (path=0x7fffffffefbf "b", mode=33261, con=0x7fffffffeb98) at > matchpathcon.c:406 #5 0x000000000040452f in setdefaultfilecon > (file=0x7fffffffefbf "b") at install.c:345 #6 change_attributes > (name=0x7fffffffefbf "b") at install.c:471 #7 install_file_in_file > (from=<optimized out>, to=0x7fffffffefbf "b", x=<optimized out>) at > install.c:672 #8 0x0000000000403cd6 in main (argc=<optimized out>, > argv=<optimized out>) at install.c:978 (gdb) > > So install is just the messenger, since it's calling libselinux's > matchpathcon function, in which all of this is happening. Given the > dwarf corruption, libselinux may be a messenger, too, but for now, > I've just put all this in a BZ: > > http://bugzilla.redhat.com/736259 > > This seems so fundamental that I have to wonder if it's something > specific to my own set-up... Grab libselinux-2.1.5-3.fc17 out of koji, should fix the problem. -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.11 (GNU/Linux) Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org/ iEYEARECAAYFAk5nc6IACgkQrlYvE4MpobNDmACeIXdcOS371tlTRGH/hjojGIHA SSMAnR8xu2PTr5zgGgzHZX9JkuxKMvOZ =DFrb -----END PGP SIGNATURE----- -- devel mailing list devel@xxxxxxxxxxxxxxxxxxxxxxx https://admin.fedoraproject.org/mailman/listinfo/devel
