linux-kernel - 2.6.23-rc7-mm1 - 'touch' command causes Oops.

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Message-ID: <3339.1190630150@turing-police.cc.vt.edu>
Date:	Mon, 24 Sep 2007 06:35:50 -0400
From:	Valdis.Kletnieks@...edu
To:	Andrew Morton <akpm@...ux-foundation.org>
Cc:	linux-kernel@...r.kernel.org
Subject: 2.6.23-rc7-mm1 - 'touch' command causes Oops.

On Mon, 24 Sep 2007 02:17:16 PDT, Andrew Morton said:

> ftp://ftp.kernel.org/pub/linux/kernel/people/akpm/patches/2.6/2.6.23-rc7/2.6.23-rc7-mm1/

It lived fast, it died young, it didn't leave a pretty corpse...

Something in the startup scripts did a 'touch', and ker-blam.

[   15.668000] Unable to handle kernel NULL pointer dereference at 0000000000000252 RIP: 
[   15.668000]  [<ffffffff802a1dd1>] __mnt_is_readonly+0x9/0x1e
[   15.668000] PGD 52be067 PUD 5645067 PMD 0 
[   15.668000] Oops: 0000 [1] PREEMPT SMP 
[   15.668000] last sysfs file: /block/dm-13/dev
[   15.668000] CPU 0 
[   15.668000] Modules linked in: rtc
[   15.668000] Pid: 528, comm: touch Not tainted 2.6.23-rc7-mm1 #1
[   15.668000] RIP: 0010:[<ffffffff802a1dd1>]  [<ffffffff802a1dd1>] __mnt_is_readonly+0x9/0x1e
[   15.668000] RSP: 0018:ffff8100045fddd8  EFLAGS: 00010202
[   15.668000] RAX: 0000000000000001 RBX: ffff810002c10680 RCX: 0000000000000001
[   15.668000] RDX: ffff810082504000 RSI: ffff810005243168 RDI: 0000000000000202
[   15.668000] RBP: ffff8100045fddd8 R08: 0000000000000001 R09: 0000000000000002
[   15.668000] R10: 0000000000000000 R11: ffff8100045fde68 R12: 0000000000000202
[   15.668000] R13: 00000000ffffffe2 R14: ffff8100052c1d80 R15: ffff8100039aa8a0
[   15.668000] FS:  00007f9527f596f0(0000) GS:ffffffff806b6000(0000) knlGS:0000000000000000
[   15.668000] CS:  0010 DS: 0000 ES: 0000 CR0: 000000008005003b
[   15.668000] CR2: 0000000000000252 CR3: 00000000052cb000 CR4: 00000000000006e0
[   15.668000] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[   15.668000] DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400
[   15.668000] Process touch (pid: 528, threadinfo ffff8100045fc000, task ffff8100047517e0)
[   15.668000] last branch before last exception/interrupt
[   15.668000]  from  [<ffffffff802a4d1b>] mnt_want_write+0x44/0xb5
[   15.668000]  to  [<ffffffff802a1dc8>] __mnt_is_readonly+0x0/0x1e
[   15.668000] Stack:  ffff8100045fde08 ffffffff802a4d20 ffff8100045fddf8 0000000000000000
[   15.668000]  00000000fffffff7 ffff810005243140 ffff8100045fdf28 ffffffff802ad288
[   15.668000]  ffff8100045fde58 0000000000000202 ffff8100045fde58 ffffffff8035437b
[   15.668000] Call Trace:
[   15.668000]  [<ffffffff802a4d20>] mnt_want_write+0x49/0xb5
[   15.668000]  [<ffffffff802ad288>] do_utimes+0xd0/0x220
[   15.668000]  [<ffffffff8035437b>] __up_read+0x7a/0x83
[   15.668000]  [<ffffffff8024b1af>] up_read+0x9/0xb
[   15.668000]  [<ffffffff8051977c>] do_page_fault+0x421/0x7d0
[   15.668000]  [<ffffffff8028b370>] do_filp_open+0x36/0x46
[   15.668000]  [<ffffffff802ad519>] sys_utimensat+0x8b/0xa5
[   15.668000]  [<ffffffff80517a4d>] error_exit+0x0/0x84
[   15.668000]  [<ffffffff8020c10e>] system_call+0x7e/0x83
[   15.668000] 
[   15.668000] 
[   15.668000] Code: f6 47 50 40 75 0d 48 8b 47 28 8a 40 58 83 e0 01 0f b6 c0 c9 
[   15.668000] RIP  [<ffffffff802a1dd1>] __mnt_is_readonly+0x9/0x1e
[   15.668000]  RSP <ffff8100045fddd8>
[   15.668000] CR2: 0000000000000252


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