[Bug 438248] Re: e2fsprogs segfaults when fsck-ing a FS that has been unmounted by Ubuntu
** Attachment added: "Screenlog of running e2fsck on the FS + GDB" http://launchpadlibrarian.net/33676536/screenlog.2.bz2 -- e2fsprogs segfaults when fsck-ing a FS that has been unmounted by Ubuntu https://bugs.launchpad.net/bugs/438248 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 438248] Re: e2fsprogs segfaults when fsck-ing a FS that has been unmounted by Ubuntu
Sorry for not getting back to you earlier. I ran another fsck a while
ago followed by a GDB session. The problem is that qsort() is being fed
an invalid pointer. But I don't know why though. Here's the most
interesting bit:
The other 70MB of the log are attached (bzipped).
(gdb) l
169 static EXT2_QSORT_TYPE ino_cmp(const void *a, const void *b)
170 {
171 const struct hash_entry *he_a = (const struct hash_entry *) a;
172 const struct hash_entry *he_b = (const struct hash_entry *) b;
173
174 return (he_a->ino - he_b->ino);
175 }
176
177 /* Used for sorting the hash entry */
178 static EXT2_QSORT_TYPE name_cmp(const void *a, const void *b)
(gdb) x he_a
0x89fbc1b8: Cannot access memory at address 0x89fbc1b8
(gdb) p he_a
$1 = (const struct hash_entry *) 0x89fbc1b8
(gdb) p *he_a
Cannot access memory at address 0x89fbc1b8
(gdb) p he_b
$2 = (const struct hash_entry *) 0x9fbc1d8
(gdb) p *he_b
$3 = {hash = 1768448865, minor_hash = 17, ino = 3087286648, dir = 0xb8044178}
--
e2fsprogs segfaults when fsck-ing a FS that has been unmounted by Ubuntu
https://bugs.launchpad.net/bugs/438248
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[Bug 438248] Re: e2fsprogs segfaults when fsck-ing a FS that has been unmounted by Ubuntu
** Changed in: e2fsprogs (Ubuntu) Status: New => Triaged ** Changed in: e2fsprogs (Ubuntu) Importance: Undecided => Medium -- e2fsprogs segfaults when fsck-ing a FS that has been unmounted by Ubuntu https://bugs.launchpad.net/bugs/438248 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 438248] Re: e2fsprogs segfaults when fsck-ing a FS that has been unmounted by Ubuntu
a...@aoeu:~/src/e2fsprogs$ sudo debugfs/debugfs /dev/sdc2 debugfs 1.41.9 (22-Aug-2009) debugfs: stat <11> Inode: 11 Type: directoryMode: 0700 Flags: 0x0 Generation: 0Version: 0x: User: 0 Group: 0 Size: 16384 File ACL: 0Directory ACL: 0 Links: 2 Blockcount: 32 Fragment: Address: 0Number: 0Size: 0 ctime: 0x49b57158: -- Mon Mar 9 19:43:20 2009 atime: 0x4ab98bf4: -- Wed Sep 23 02:46:12 2009 mtime: 0x49b57158: -- Mon Mar 9 19:43:20 2009 crtime: 0x49b57158: -- Mon Mar 9 19:43:20 2009 Size of extra inode fields: 28 BLOCKS: (0-3):1540-1543 TOTAL: 4 debugfs: ls <11> 11 (12) .2 (4084) ..0 (4096) 0 (4096) 0 (4096) -- e2fsprogs segfaults when fsck-ing a FS that has been unmounted by Ubuntu https://bugs.launchpad.net/bugs/438248 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 438248] Re: e2fsprogs segfaults when fsck-ing a FS that has been unmounted by Ubuntu
Can you try using running debugfs on the filesystem and sending me the output of the following two debugfs commands: stat <11> ls <11> thanks!! -- e2fsprogs segfaults when fsck-ing a FS that has been unmounted by Ubuntu https://bugs.launchpad.net/bugs/438248 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 438248] Re: e2fsprogs segfaults when fsck-ing a FS that has been unmounted by Ubuntu
I've had it crash twice now. Once under GDB. I pulled the latest e2fsprogs from git and I'm running it with those. /dev/sdb2 is minus 5 GB now according to df -h :) $ df -h /media/Igla/ FilesystemSize Used Avail Use% Mounted on /dev/sdc2 411G -5.1G 416G - /media/Igla But actually it's around 280 GB, aside from Internet connectivity issues I'd have currently transferring something that big there's private data on that partition. Like a backup of my ~ directory. I'm running it again with the git/master version and I'm noting the full e2fsck/syslog/dmesg output being produced in the process. -- e2fsprogs segfaults when fsck-ing a FS that has been unmounted by Ubuntu https://bugs.launchpad.net/bugs/438248 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 438248] Re: e2fsprogs segfaults when fsck-ing a FS that has been unmounted by Ubuntu
Is the crash consistently repeatable? How big is /dev/sdb2? Would you be willing to send me a compressed e2image file of the filesystem? (See the REPORTING BUGS section of the e2fsck man page for more details.) -- e2fsprogs segfaults when fsck-ing a FS that has been unmounted by Ubuntu https://bugs.launchpad.net/bugs/438248 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
