Package: btrfs-tools Version: 0.19-8 Severity: important
btrfsck tries to free an invalid memory location on armel: flatty:~# gdb $(which btrfsck) GNU gdb (GDB) 7.0.1-debian Copyright (C) 2009 Free Software Foundation, Inc. License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html> This is free software: you are free to change and redistribute it. There is NO WARRANTY, to the extent permitted by law. Type "show copying" and "show warranty" for details. This GDB was configured as "arm-linux-gnueabi". For bug reporting instructions, please see: <http://www.gnu.org/software/gdb/bugs/>... Reading symbols from /sbin/btrfsck...Reading symbols from /usr/lib/debug/sbin/btrfsck...done. (no debugging symbols found)...done. (gdb) run /dev/mmcblk0p1 Starting program: /sbin/btrfsck /dev/mmcblk0p1 warning devid 2 not found already Program received signal SIGBUS, Bus error. *__GI___libc_free (mem=0xbf1bd446) at malloc.c:3709 3709 if (chunk_is_mmapped(p)) /* release mmapped memory. */ (gdb) where #0 *__GI___libc_free (mem=0xbf1bd446) at malloc.c:3709 #1 0x00017b10 in close_all_devices (root=<value optimized out>) at disk-io.c:943 #2 close_ctree (root=<value optimized out>) at disk-io.c:986 #3 0x0000f1e8 in main (ac=<value optimized out>, av=<value optimized out>) at btrfsck.c:2466 Please note that the SIGBUS (misaligned memory access) is a red herring - the memory location that's passed to free() is invalid. I don't know exactly where it got corrupted (open_ctree_fd() clears fs_info using memset, so it should be 0), but it's already invalid upon return from open_ctree_fd(): Breakpoint 6, open_ctree (filename=0xbee2ddce "/dev/mmcblk0p1", sb_bytenr=<value optimized out>, writes=0) at disk-io.c:590 590 close(fp); (gdb) p ((struct btrfs_device*)(root->fs_info->fs_devices->devices->next))->name $39 = 0xbf1bd446 <Address 0xbf1bd446 out of bounds> Core dump available on request. AFAICT this is a Debian-specific issue - without 03-valgrind.patch, free() won't be called at all on device->name. -- System Information: Debian Release: squeeze/sid APT prefers testing APT policy: (500, 'testing') Architecture: armel (armv5tel) Kernel: Linux 2.6.34-rc7-flatty-ocf-2-00126-g835446b Locale: LANG=en_GB.UTF-8, LC_CTYPE=en_US.UTF-8 (charmap=UTF-8) Shell: /bin/sh linked to /bin/dash Versions of packages btrfs-tools depends on: ii e2fslibs 1.41.11-1 ext2/ext3/ext4 file system librari ii libc6 2.10.2-6 Embedded GNU C Library: Shared lib ii libcomerr2 1.41.11-1 common error description library ii libgcc1 1:4.4.2-9 GCC support library ii libuuid1 2.16.2-0 Universally Unique ID library ii zlib1g 1:1.2.3.4.dfsg-3 compression library - runtime btrfs-tools recommends no packages. btrfs-tools suggests no packages. -- no debconf information -- To UNSUBSCRIBE, email to debian-bugs-dist-requ...@lists.debian.org with a subject of "unsubscribe". Trouble? Contact listmas...@lists.debian.org
