Re: [Bug #16393] kernel BUG at fs/block_dev.c:765!

["Justin P. Mattock" <justinmattock-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>]

On 07/23/2010 06:33 AM, Markus Trippelsdorf wrote:
> On Fri, Jul 23, 2010 at 01:47:36PM +0200, Rafael J. Wysocki wrote:
>> This message has been generated automatically as a part of a summary report
>> of recent regressions.
>>
>> The following bug entry is on the current list of known regressions
>> from 2.6.34.  Please verify if it still should be listed and let the tracking team
>> know (either way).
>
> It happend again today:
>
> ...
> Jul 23 09:22:00 arch kernel: r8169 0000:02:05.0: eth0: link up
> Jul 23 09:22:00 arch kernel: r8169: WARNING! Changing of MTU on this NIC may lead to frame reception errors!
> Jul 23 13:41:43 arch kernel: ------------[ cut here ]------------
> Jul 23 13:41:43 arch kernel: kernel BUG at fs/block_dev.c:765!
> Jul 23 13:41:43 arch kernel: invalid opcode: 0000 [#1] SMP
> Jul 23 13:41:43 arch kernel: last sysfs file: /sys/devices/system/cpu/cpu0/cpufreq/cpuinfo_max_freq
> Jul 23 13:41:43 arch kernel: CPU 1
> Jul 23 13:41:43 arch kernel: Pid: 2616, comm: mount Not tainted 2.6.35-rc6-00012-g7e5a57e #32 M4A78T-E/System Product Name
> Jul 23 13:41:43 arch kernel: RIP: 0010:[<ffffffff810f66c7>]  [<ffffffff810f66c7>] __bd_abort_claiming+0x17/0x40
> Jul 23 13:41:43 arch kernel: RSP: 0018:ffff880035d07d18  EFLAGS: 00010207
> Jul 23 13:41:43 arch kernel: RAX: 0000000000009292 RBX: ffff88011f8249c0 RCX: 0000000000000002
> Jul 23 13:41:43 arch kernel: RDX: 0000000000000003 RSI: ffffffff8182f0a0 RDI: ffff88011f8249c0
> Jul 23 13:41:43 arch kernel: RBP: ffff880035d07d28 R08: ffff880035d07b68 R09: ffffffff81877ea8
> Jul 23 13:41:43 arch kernel: R10: ffff880035d07cb8 R11: 0000000000000010 R12: ffff88011f8249c0
> Jul 23 13:41:43 arch kernel: R13: 0000000000000001 R14: ffffffff8182f0a0 R15: 00000000ffffff85
> Jul 23 13:41:43 arch kernel: FS:  00007f727e6a8740(0000) GS:ffff880001a80000(0000) knlGS:0000000000000000
> Jul 23 13:41:43 arch kernel: CS:  0010 DS: 0000 ES: 0000 CR0: 000000008005003b
> Jul 23 13:41:43 arch kernel: CR2: 00007f99480f2000 CR3: 000000003c34d000 CR4: 00000000000006e0
> Jul 23 13:41:43 arch kernel: DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
> Jul 23 13:41:43 arch kernel: DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400
> Jul 23 13:41:43 arch kernel: Process mount (pid: 2616, threadinfo ffff880035d06000, task ffff88011afe0000)
> Jul 23 13:41:43 arch kernel: Stack:
> Jul 23 13:41:43 arch kernel: ffff880035d07d28 ffffffffffffff85 ffff880035d07d68 ffffffff810f7b6c
> Jul 23 13:41:43 arch kernel:<0>  ffff880035d07d98 0000000000000001 ffffffff8182f0a0 0000000000000001
> Jul 23 13:41:43 arch kernel:<0>  ffff88003c3c5000 ffffffff8182f0a0 ffff880035d07de8 ffffffff810d3daa
> Jul 23 13:41:43 arch kernel: Call Trace:
> Jul 23 13:41:43 arch kernel: [<ffffffff810f7b6c>] open_bdev_exclusive+0xb3/0xc3
> Jul 23 13:41:43 arch kernel: [<ffffffff810d3daa>] get_sb_bdev+0x47/0x178
> Jul 23 13:41:43 arch kernel: [<ffffffff8113121c>] ? ext4_fill_super+0x0/0x208d
> Jul 23 13:41:43 arch kernel: [<ffffffff8112e6ba>] ext4_get_sb+0x18/0x1a
> Jul 23 13:41:43 arch kernel: [<ffffffff810d40af>] vfs_kern_mount+0x62/0xff
> Jul 23 13:41:43 arch kernel: [<ffffffff810d431b>] do_kern_mount+0x4d/0xef
> Jul 23 13:41:43 arch kernel: [<ffffffff810e86ad>] do_mount+0x6cb/0x744
> Jul 23 13:41:43 arch kernel: [<ffffffff810e87fb>] sys_mount+0x8c/0xcd
> Jul 23 13:41:43 arch kernel: [<ffffffff8102b93b>] system_call_fastpath+0x16/0x1b
> Jul 23 13:41:43 arch kernel: Code: c7 c3 f4 ff ff ff 5Jul 23 13:42:38 arch kernel: Linux version 2.6.35-rc6-00012-g7e5a57e (markus-joY5NpejW+Hx3b7vapvTcQ@public.gmane.org) (gcc version 4.5.0 20100610 (prerelease) (GCC) ) #32 SMP Fri Jul 23 09:21:31 CEST 2010
> Jul 23 13:42:38 arch kernel: Command line: BOOT_IMAGE=/usr/src/linux/arch/x86/boot/bzImage root=/dev/sdb2 fbcon=rotate:3 drm.edid_force_checksum=1 quiet
> Jul 23 13:42:38 arch kernel: BIOS-provided physical RAM map:



o.k. so im not going insane then... problem over here is the machine is 
responding as if nothing like that occurs. atheros has one of these as 
well(like I posted)

how to reproduce such a beast of a bug...

Justin P. Mattock