On Tue, Oct 07, 2014 at 11:56:43PM +0300, Sami Liedes wrote: > Hi, > > Here's one more filesystem that causes a crash in ext4_put_super on > 3.17 both with and without the two patches from this thread applied. > > Interestingly this one does not seem to crash on 3.16.4, with or > without the patches from this thread. Even on 3.17 I *think* I've seen > it not crash, but the reproducibility seems to be well over 95%. Oh, I got it to crash on 3.17. :) Does mounting with -o block_validity eliminate the backtrace, at least? With that option, I get this instead: EXT4-fs error (device loop0): ext4_map_blocks:559: inode #8: block 139: comm jbd2/loop0-8: lblock 15 mapped to illegal pblock (length 1) jbd2_journal_bmap: journal block not found at offset 15 on loop0-8 ...and a journal abort. Not nice, but at least the kernel doesn't blow up. --D > > Crashing image: > > http://www.niksula.hut.fi/~sliedes/ext4/ext4_put_super/testimg.ext4.112041.min.bz2 > > Pristine image: > > http://www.niksula.hut.fi/~sliedes/ext4/testimg.ext4.pristine.bz2 > > Diff: > > --- /dev/fd/63 2014-10-07 23:52:33.397018880 +0300 > +++ /dev/fd/62 2014-10-07 23:52:33.398018880 +0300 > @@ -36771,7 +36771,7 @@ > 001bd040 65 76 65 6e 74 30 00 00 b8 04 00 00 10 00 05 02 |event0..........| > 001bd050 62 79 2d 69 64 00 00 00 bc 04 00 00 10 00 07 02 |by-id...........| > 001bd060 62 79 2d 70 61 74 68 00 c2 04 00 00 10 00 06 03 |by-path.........| > -001bd070 65 76 65 6e 74 35 00 00 c3 04 00 00 0c 00 04 03 |event5..........| > +001bd070 65 76 65 6e 74 35 00 00 c3 00 00 00 0c 00 04 03 |event5..........| > 001bd080 6d 69 63 65 c4 04 00 00 10 00 06 03 65 76 65 6e |mice........even| > 001bd090 74 32 00 00 c5 04 00 00 10 00 06 03 65 76 65 6e |t2..........even| > 001bd0a0 74 33 00 00 c6 04 00 00 5c 03 06 03 65 76 65 6e |t3......\...even| > > Backtrace: > > [ 1.936509] EXT4-fs (vdb): sb orphan head is 195 > [ 1.936889] sb_info orphan list: > [ 1.937145] inode vdb:195 at ffff880006675d90: mode 40755, nlink 0, next 0 > [ 1.937699] ------------[ cut here ]------------ > [ 1.938057] kernel BUG at fs/ext4/super.c:836! > [ 1.938419] invalid opcode: 0000 [#1] SMP > [ 1.938788] CPU: 0 PID: 1041 Comm: umount Not tainted 3.17.0+ #32 > [ 1.939278] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.7.5-20140531_083030-gandalf 04/01/2014 > [ 1.940059] task: ffff8800060bd2d0 ti: ffff88000639c000 task.ti: ffff88000639c000 > [ 1.940299] RIP: 0010:[<ffffffff812753e6>] [<ffffffff812753e6>] ext4_put_super+0x366/0x370 > [ 1.940299] RSP: 0018:ffff88000639fe70 EFLAGS: 00010287 > [ 1.940299] RAX: 0000000000000040 RBX: ffff8800063b6800 RCX: 0000000000006665 > [ 1.940299] RDX: 0000000000000040 RSI: 0000000000000001 RDI: 0000000000000286 > [ 1.940299] RBP: ffff88000639fea0 R08: 0000000000000001 R09: 0000000000000000 > [ 1.940299] R10: 0000000000000000 R11: 0000000000000001 R12: ffff8800063b6b28 > [ 1.940299] R13: ffff8800063b6000 R14: ffff8800063b6a88 R15: ffff8800063b6b28 > [ 1.940299] FS: 0000000000000000(0000) GS:ffff880007c00000(0063) knlGS:00000000f7549780 > [ 1.940299] CS: 0010 DS: 002b ES: 002b CR0: 000000008005003b > [ 1.940299] CR2: 000000000a02e004 CR3: 000000000635f000 CR4: 00000000000006b0 > [ 1.940299] Stack: > [ 1.940299] ffff880000000000 ffff8800063b6000 ffff8800063b60f8 ffffffff81a33e00 > [ 1.940299] 0000000000000000 0000000000000000 ffff88000639fec8 ffffffff81164ebd > [ 1.940299] 0000000000000083 ffff880006c0d600 ffff8800063a2780 ffff88000639fee8 > [ 1.940299] Call Trace: > [ 1.940299] [<ffffffff81164ebd>] generic_shutdown_super+0x6d/0xf0 > [ 1.940299] [<ffffffff81166122>] kill_block_super+0x22/0x70 > [ 1.940299] [<ffffffff81164bdc>] deactivate_locked_super+0x3c/0x60 > [ 1.940299] [<ffffffff81164c5c>] deactivate_super+0x5c/0x60 > [ 1.940299] [<ffffffff81183cd0>] mntput_no_expire+0x180/0x210 > [ 1.940299] [<ffffffff81185757>] ? SyS_umount+0x87/0x100 > [ 1.940299] [<ffffffff81185757>] SyS_umount+0x87/0x100 > [ 1.940299] [<ffffffff8188e888>] sysenter_dispatch+0x7/0x2a > [ 1.940299] [<ffffffff8165e9cb>] ? trace_hardirqs_on_thunk+0x3a/0x3f > [ 1.940299] Code: b0 10 05 00 00 41 8b 87 64 ff ff ff 89 04 24 31 c0 e8 f7 ae 60 00 4d 8b 3f 4d 39 fc 75 b5 4c 3b a3 28 03 00 00 0f 84 af fe ff ff <0f> 0b 0f 1f 84 00 00 00 00 00 55 48 89 e5 41 54 4c 8d a7 90 fe > [ 1.940299] RIP [<ffffffff812753e6>] ext4_put_super+0x366/0x370 > [ 1.940299] RSP <ffff88000639fe70> > [ 1.958649] ---[ end trace 6419dd181c457894 ]--- > [ 1.959008] Kernel panic - not syncing: Fatal exception > [ 1.959568] Kernel Offset: 0x0 from 0xffffffff81000000 (relocation range: 0xffffffff80000000-0xffffffff9fffffff) > [ 1.960337] Rebooting in 1 seconds.. -- To unsubscribe from this list: send the line "unsubscribe linux-ext4" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
