linux-kernel - Re: 2.6.26-rc7: BUG at kernel/power/snapshot.c:493

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Date:	Wed, 9 Jul 2008 16:08:23 +0300
From:	Martin Michlmayr <tbm@...ius.com>
To:	Soeren Sonnenburg <kernel@....de>
Cc:	Linux Kernel <linux-kernel@...r.kernel.org>,
	"Rafael J. Wysocki" <rjw@...k.pl>
Subject: Re: 2.6.26-rc7: BUG at kernel/power/snapshot.c:493

* Soeren Sonnenburg <kernel@....de> [2008-06-27 18:43]:
> Anyone else seeing this? Happened after resuming from s2both (from
> disk)...

FWIW, I got something similar a few days ago with s2disk and 2.6.25.
I had never seen this before but then I got the same bug two or three
times within a day.  It happens when resuming the laptop from disk.
The kernel continues to start fine but doesn't restore the previous
state.

[   10.024084] ------------[ cut here ]------------
[   10.025255] kernel BUG at kernel/power/snapshot.c:493!
[   10.025255] invalid opcode: 0000 [1] SMP 
[   10.025255] CPU 0 
[   10.025255] Modules linked in: sha256_generic aes_x86_64 aes_generic cbc dm_crypt crypto_blkcipher dm_mirror dm_snapshot dm_mod ide_cd_mod cdrom ide_disk ata_generic libata scsi_mod dock piix ide_pci_generic ide_core ehci_hcd uhci_hcd thermal processor fan
[   10.025255] Pid: 1520, comm: resume Not tainted 2.6.25-2-amd64 #1
[   10.025255] RIP: 0010:[<ffffffff80257d19>]  [<ffffffff80257d19>] memory_bm_set_bit+0x15/0x28
[   10.025255] RSP: 0018:ffff81007c9fbe90  EFLAGS: 00010282
[   10.025255] RAX: 00000000fffffff2 RBX: 0000000000000001 RCX: ffff81007c9fbe9c
[   10.025255] RDX: ffff81007c9fbe90 RSI: 0100000000000000 RDI: ffffffff80618ac0
[   10.025255] RBP: ffff81007c016000 R08: ffff81007c9fbe90 R09: 0000000000000002
[   10.025255] R10: 0000000000000002 R11: ffffffff802efae3 R12: 00007f853856a010
[   10.025255] R13: ffffffff80618b20 R14: 0000000000000004 R15: 0000000000001000
[   10.025255] FS:  0000000002090850(0063) GS:ffffffff80520000(0000) knlGS:0000000000000000
[   10.025255] CS:  0010 DS: 0000 ES: 0000 CR0: 000000008005003b
[   10.025255] CR2: 0000000000445230 CR3: 000000007c914000 CR4: 00000000000006e0
[   10.025255] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[   10.025255] DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400
[   10.025255] Process resume (pid: 1520, threadinfo ffff81007c9fa000, task ffff81007cd4a400)
[   10.025255] Stack:  ffff81007e877180 0000000000000092 ffffffff80258e7a 0000000000000000
[   10.025255]  ffff81007d8d4380 ffffffff80618b20 00007f853856a010 ffff81007c9fbf50
[   10.025255]  0000000000000004 00007f8538568010 ffffffff80259fd8 000000000001d688
[   10.025255] Call Trace:
[   10.025255]  [<ffffffff80258e7a>] ? snapshot_write_next+0xec/0x646
[   10.025255]  [<ffffffff80259fd8>] ? snapshot_write+0x22/0x5c
[   10.025255]  [<ffffffff8029ab65>] ? vfs_write+0xad/0x156
[   10.025255]  [<ffffffff8029b107>] ? sys_write+0x45/0x6e
[   10.025255]  [<ffffffff8020bd9a>] ? system_call_after_swapgs+0x8a/0x8f
[   10.025255] 
[   10.025255] 
[   10.025255] Code: 6d 48 8d 34 37 48 89 d7 48 c1 fe 03 48 0f af f0 e9 72 ff ff ff c3 48 83 ec 10 48 8d 4c 24 0c 48 89 e2 e8 e4 fe ff ff 85 c0 74 04 <0f> 0b eb fe 8b 54 24 0c 48 8b 04 24 f0 0f ab 10 59 5e c3 48 8b 
[   10.025255] RIP  [<ffffffff80257d19>] memory_bm_set_bit+0x15/0x28
[   10.025255]  RSP <ffff81007c9fbe90>
[   10.025266] ---[ end trace a54fd545107adef9 ]---

Full dmesg is attached.
-- 
Martin Michlmayr
http://www.cyrius.com/

View attachment "dmesg-snapshot-bug" of type "text/plain" (41911 bytes)