Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752915Ab0HZJyi (ORCPT ); Thu, 26 Aug 2010 05:54:38 -0400 Received: from mail-ew0-f46.google.com ([209.85.215.46]:45641 "EHLO mail-ew0-f46.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752000Ab0HZJyg (ORCPT ); Thu, 26 Aug 2010 05:54:36 -0400 DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=date:from:to:cc:subject:message-id:mime-version:content-type :content-disposition:user-agent; b=Z+H+ZXA3QBPOGMeVjqYU5S/6pV740rZL3DM+LZ4J6bSlxfiMdZB8vYbdxv4VctrT33 ZPtx2SAMv/jK7DpTkXdnvFlYzAzlGVLoYHTVb0a5IBK23bEQahddKUHb+E1TDNHmXrjo BvP1gaZk7KhRABbrSEUpylZV8Z2RvzCrvesNw= Date: Thu, 26 Aug 2010 11:53:57 +0200 From: "Carlos R. Mafra" To: linux-btrfs@vger.kernel.org Cc: linux-kernel@vger.kernel.org Subject: [2.6.35.3] BUG: unable to handle kernel NULL pointer dereference at (null) Message-ID: <20100826095357.GA7202@Pilar.aei.mpg.de> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline User-Agent: Mutt/1.5.20 (2009-06-14) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 3700 Lines: 64 Hi, I've just got this BUG: message in dmesg which I think is btrfs related. I have a btrfs filesystem in a memory card which I use to contain the cache and config of chromium (to avoid writing to much in the SSD): /dev/mmcblk0p1 on /home/mafra/mmc type btrfs (rw,noexec,nosuid,nodev,noatime,noacl,compress) and the last message before the bug is about the memory card. [ 148.149179] mmcblk0: retrying using single block read [ 148.152014] BUG: unable to handle kernel NULL pointer dereference at (null) [ 148.152021] IP: [] extent_range_uptodate+0x51/0xa0 [ 148.152030] PGD 72c37067 PUD 7d64b067 PMD 0 [ 148.152035] Oops: 0000 [#1] SMP [ 148.152038] last sysfs file: /sys/devices/system/cpu/cpu0/cpufreq/scaling_cur_freq [ 148.152041] CPU 1 [ 148.152043] Modules linked in: snd_seq snd_seq_device snd_hda_codec_idt i2c_i801 snd_hda_intel snd_hda_codec sky2 uvcvideo iwlagn snd_hwdep evdev [ 148.152053] [ 148.152057] Pid: 2731, comm: btrfs-endio-met Not tainted 2.6.35.3+ #12 VAIO/VGN-FZ240E [ 148.152059] RIP: 0010:[] [] extent_range_uptodate+0x51/0xa0 [ 148.152064] RSP: 0018:ffff880079acddd0 EFLAGS: 00010246 [ 148.152066] RAX: 0000000000000000 RBX: 0000000043eba000 RCX: 0000000000000000 [ 148.152068] RDX: 0000000000000001 RSI: 0000000000043eba RDI: 0000000000000001 [ 148.152071] RBP: ffff880079acddf0 R08: 0000000000000000 R09: 0000000000000000 [ 148.152073] R10: 0000000000001000 R11: 0000000000000000 R12: ffff88007b40eb18 [ 148.152076] R13: 0000000043ebadff R14: ffff880079ab0000 R15: ffff880079acde80 [ 148.152079] FS: 0000000000000000(0000) GS:ffff880001b00000(0000) knlGS:0000000000000000 [ 148.152081] CS: 0010 DS: 0000 ES: 0000 CR0: 000000008005003b [ 148.152084] CR2: 0000000000000000 CR3: 0000000070be9000 CR4: 00000000000006e0 [ 148.152086] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 148.152088] DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400 [ 148.152091] Process btrfs-endio-met (pid: 2731, threadinfo ffff880079acc000, task ffff880079aca8c0) [ 148.152093] Stack: [ 148.152094] ffffffff8104e730 ffff880069b9c8f8 ffff88007e87ca40 ffff880069b9c8c0 [ 148.152098] <0> ffff880079acde20 ffffffff8118a42d ffff88007bbc70c0 ffff880069b9c8f8 [ 148.152102] <0> ffff88007bbc70d8 ffff88007bbc7110 ffff880079acdee0 ffffffff811b98f0 [ 148.152107] Call Trace: [ 148.152113] [] ? process_timeout+0x0/0x10 [ 148.152118] [] end_workqueue_fn+0x10d/0x130 [ 148.152122] [] worker_loop+0xb0/0x5a0 [ 148.152126] [] ? worker_loop+0x0/0x5a0 [ 148.152130] [] kthread+0x8e/0xa0 [ 148.152135] [] kernel_thread_helper+0x4/0x10 [ 148.152138] [] ? kthread+0x0/0xa0 [ 148.152142] [] ? kernel_thread_helper+0x0/0x10 [ 148.152144] Code: d3 ff ff 89 c2 b8 01 00 00 00 85 d2 75 56 4c 39 eb 77 51 0f 1f 80 00 00 00 00 48 89 de 49 8b 7c 24 10 48 c1 ee 0c e8 3f 21 ef ff 00 08 74 2a 48 89 c7 48 81 c3 00 10 00 00 e8 4b af ef ff 49 [ 148.152176] RIP [] extent_range_uptodate+0x51/0xa0 [ 148.152180] RSP [ 148.152182] CR2: 0000000000000000 [ 148.152185] ---[ end trace c11a5009b12451d7 ]--- Full dmesg is here http://www.aei.mpg.de/~crmafra/dmesg-2.6.35.3.txt Is there something else I should provide to help debug this? -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/