Bug#252391: kernel-source-2.6.6: Assertion failure in journal_flush() ... "!journal->j_running_transaction"
On Wed, Jun 02, 2004 at 11:40:37PM -0400, David Coe wrote:
> Package: kernel-source-2.6.6
> Version: 2.6.6-1
> Severity: normal
>
> I've been using a locally-compiled kernel from this source since May
> 17, without problems; tonight when I tried to "mount -o remount,ro
> /usr" I got the following failure, after which I was unable to sync or
> kill any processes -- a hard reboot "fixed" it, ext3 recovered cleanly.
..
> A search of the ext3-users mailing list turned up a previous
> discussion of a similar problem, which was apparently left
> unresolved (or at least that thread ended inconclusively) -- see
> https://www.redhat.com/archives/ext3-users/2003-May/msg00093.html
> which suggests where the problem is. I see that
> ext3_mark_recovery_complete() still doesn't call
> journal_lock_updates(), as that thread suggests it should. I haven't
> researched further yet.
Yes that code does look racy.
Andrew, what's stopping a journal_start() from setting j_running_transaction
just before the last spin_lock(&journal->j_state_lock) that guards the
J_ASSERT that was hit below?
> Jun 2 21:33:15 zona kernel: Assertion failure in journal_flush() at fs/jbd/journal.c:1309: "!journal->j_running_transaction"
> Jun 2 21:33:15 zona kernel: ------------[ cut here ]------------
> Jun 2 21:33:15 zona kernel: kernel BUG at fs/jbd/journal.c:1309!
> Jun 2 21:33:15 zona kernel: invalid operand: 0000 [#1]
> Jun 2 21:33:15 zona kernel: SMP
> Jun 2 21:33:15 zona kernel: CPU: 1
> Jun 2 21:33:15 zona kernel: EIP: 0060:[journal_flush+228/460] Not tainted
> Jun 2 21:33:15 zona kernel: EFLAGS: 00010216 (2.6.6zona-06009se)
> Jun 2 21:33:15 zona kernel: EIP is at journal_flush+0xe4/0x1cc
> Jun 2 21:33:15 zona kernel: eax: 00000064 ebx: 000016e3 ecx: 00000000 edx: c03548ac
> Jun 2 21:33:15 zona kernel: esi: e716ba00 edi: 00000000 ebp: ce5d3f6c esp: ce5d3ebc
> Jun 2 21:33:15 zona kernel: ds: 007b es: 007b ss: 0068
> Jun 2 21:33:15 zona kernel: Process mount (pid: 5202, threadinfo=ce5d2000 task=e13f4390)
> Jun 2 21:33:15 zona kernel: Stack: c02f45c0 c02f4c80 c02f44b5 0000051d c02f4c60 e716be00 e6e0b400 e716be00
> Jun 2 21:33:15 zona kernel: c018161b e716ba00 e716bc00 c01818ea e716be00 e6e0b400 e716be00 e716be50
> Jun 2 21:33:15 zona kernel: ce5d3f6c c0147c1b c014c784 e716be00 ce5d3f24 c8412000 e716be00 e716be40
> Jun 2 21:33:15 zona kernel: Call Trace:
> Jun 2 21:33:15 zona kernel: [ext3_mark_recovery_complete+23/76] ext3_mark_recovery_complete+0x17/0x4c
> Jun 2 21:33:15 zona kernel: [ext3_remount+198/296] ext3_remount+0xc6/0x128
> Jun 2 21:33:15 zona kernel: [fs_may_remount_ro+51/114] fs_may_remount_ro+0x33/0x72
> Jun 2 21:33:15 zona kernel: [do_remount_sb+152/200] do_remount_sb+0x98/0xc8
> Jun 2 21:33:15 zona kernel: [do_remount+112/188] do_remount+0x70/0xbc
> Jun 2 21:33:15 zona kernel: [do_mount+293/392] do_mount+0x125/0x188
> Jun 2 21:33:15 zona kernel: [copy_mount_options+85/164] copy_mount_options+0x55/0xa4
> Jun 2 21:33:15 zona kernel: [sys_mount+189/320] sys_mount+0xbd/0x140
> Jun 2 21:33:15 zona kernel: [sysenter_past_esp+82/113] sysenter_past_esp+0x52/0x71
> Jun 2 21:33:15 zona kernel:
> Jun 2 21:33:15 zona kernel: Code: 0f 0b 1d 05 b5 44 2f c0 83 c4 14 83 7e 34 00 74 29 68 a0 4c
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