From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751157AbWGGFhI (ORCPT ); Fri, 7 Jul 2006 01:37:08 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1751177AbWGGFhI (ORCPT ); Fri, 7 Jul 2006 01:37:08 -0400 Received: from ug-out-1314.google.com ([66.249.92.171]:3976 "EHLO ug-out-1314.google.com") by vger.kernel.org with ESMTP id S1751157AbWGGFhG (ORCPT ); Fri, 7 Jul 2006 01:37:06 -0400 DomainKey-Signature: a=rsa-sha1; q=dns; c=nofws; s=beta; d=gmail.com; h=received:message-id:date:from:to:subject:cc:in-reply-to:mime-version:content-type:content-transfer-encoding:content-disposition:references; b=cC+PqHLDsG80ODzut6zL8jKXpGMF03mZf5e6ON4699mGAQAkVm+baVdUZCqo9+Yqo7p8iL1BysDv/LudhEztWKuKjfOd1RPlv+16x4uqgW8rckFyFwZJ9RlkO+Tqn8Usnk67/QFe7I/pvquvt9EaiNvZjqVYVEX2td1xnMm6Lic= Message-ID: Date: Thu, 6 Jul 2006 22:37:05 -0700 From: "Bret Towe" To: "Andrew Morton" Subject: Re: 2.6.18-rc1 bttv modprobe null pointer dereference Cc: linux-kernel@vger.kernel.org In-Reply-To: <20060706215225.290360bf.akpm@osdl.org> MIME-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Content-Disposition: inline References: <20060706215225.290360bf.akpm@osdl.org> Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org On 7/6/06, Andrew Morton wrote: > On Thu, 6 Jul 2006 20:51:27 -0700 > "Bret Towe" wrote: > > > when upgrading to 2.6.18-rc1 i got the below error > > when doing modprobe bttv card=78 > > tho the card option didnt seem to matter much > > i did see a email on the list on what looked to me the same issue > > but was for a -mm kernel only 3 message in the thread i have > > and no follow up was done from what i see > > > > > > bttv0: registered device video0 > > Unable to handle kernel NULL pointer dereference at 0000000000000149 RIP: > > [] sysfs_add_file+0x2b/0xb0 > > PGD 27755067 PUD 27754067 PMD 0 > > Oops: 0000 [1] PREEMPT > > CPU 0 > > Modules linked in: bttv video_buf firmware_class ir_common > > compat_ioctl32 i2c_algo_bit btcx_risc tveeprom videodev v4l2_common > > radeon drm snd_seq_midi snd_emu10k1_synth snd_emux_synth > > snd_seq_virmidi snd_seq_midi_emul snd_pcm_oss snd_mixer_oss > > snd_seq_oss snd_seq_midi_event snd_seq snd_emu10k1 snd_rawmidi > > snd_ac97_codec snd_ac97_bus snd_pcm snd_seq_device snd_timer > > snd_page_alloc snd_util_mem snd_hwdep snd vfat fat w83627hf hwmon_vid > > i2c_isa i2c_core r8169 dm_snapshot dm_mirror dm_mod sbp2 ohci1394 > > ieee1394 usb_storage > > Pid: 9330, comm: modprobe Tainted: G M 2.6.18-rc1 #1 > > That's claiming there was a machine check exception. Can you check the > full dmesg, see if anything else odd happened? didnt see anything out of place/new on dmesg and i dont see anything at all about mce > Is this repeatable? It sounds like it is. > > > RIP: 0010:[] [] sysfs_add_file+0x2b/0xb0 > > RSP: 0018:ffff81002ac71c28 EFLAGS: 00010286 > > RAX: 00000000ffffff00 RBX: ffffffff88207460 RCX: 00000000ffffffff > > RDX: 0000000000000004 RSI: ffffffff881fd6c0 RDI: 0000000000000001 > > RBP: ffff81002ac71c58 R08: 0000000000000000 R09: 0000000000000001 > > R10: ffffffff80218b42 R11: 0000000000000000 R12: ffffffff881fd6c0 > > R13: 0000000000000001 R14: 00000000ffffffef R15: 0000000000000000 > > FS: 00002b58f0e16d50(0000) GS:ffffffff809f2000(0000) knlGS:0000000000000000 > > CS: 0010 DS: 0000 ES: 0000 CR0: 000000008005003b > > CR2: 0000000000000149 CR3: 0000000027740000 CR4: 00000000000006e0 > > Process modprobe (pid: 9330, threadinfo ffff81002ac70000, task ffff8100284ea040) > > Stack: 000000042ac71c38 ffffffff88207460 0000000000000000 ffff81003ff5f000 > > ffffffff88208160 0000000000000000 ffff81002ac71c68 ffffffff802f205e > > ffff81002ac71c78 ffffffff8040c307 ffff81002ac71cb8 ffffffff881e6b9d > > Call Trace: > > [] sysfs_create_file+0x3e/0x40 > > [] class_device_create_file+0x17/0x20 > > [] :bttv:bttv_probe+0x64d/0x840 > > [] pci_device_probe+0x5d/0xa0 > > [] driver_probe_device+0x67/0xe0 > > [] __driver_attach+0x8d/0xf0 > > [] bus_for_each_dev+0x4f/0x80 > > [] driver_attach+0x1c/0x20 > > [] bus_add_driver+0x8e/0x160 > > [] driver_register+0xcd/0xe0 > > [] __pci_register_driver+0x63/0x90 > > [] :bttv:bttv_init_module+0xb4/0xc0 > > [] sys_init_module+0x155b/0x1760 > > [] system_call+0x7e/0x83 > > [<00002b58f0ca66cc>] > > > > Code: 4c 8b bf 48 01 00 00 48 8b bf c0 00 00 00 8b 5e 10 48 81 c7 > > RIP [] sysfs_add_file+0x2b/0xb0 > > RSP > > CR2: 0000000000000149 > > There don't seem to have been significant changes in bttv-driver.c for some > time, and we're seeing a few reports like this. I'm suspecting that either > a sysfs/driver-core change was wrong, or previously wrong driver behaviour > is now causing oopses. > > And Mauro is offline until July 12. > > Can you send the .config please? >