Path: csiph.com!aioe.org!bofh.it!news.nic.it!robomod From: Andrey Wagin Newsgroups: linux.kernel Subject: linux-next: BUG: unable to handle kernel NULL pointer dereference in cfq_print_leaf_weight() Date: Thu, 18 Jun 2015 00:00:01 +0200 Message-ID: X-Original-To: LKML Dkim-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=mime-version:date:message-id:subject:from:to:cc:content-type; bh=IAteLKmTWfVObdWcHZfoY0l6LapwNieJfS3ot+1LK2Y=; b=NLibdES0exSF6B0YFLyX9dmCcnoMyOf7DlPD+TCJenm9x4SbRE+iTLiblQswUDLqD5 CQbznSnUauc9iHjRXTZoZUMpZNVla+pU+OFu8vT7534Fd2hJlgMBT7jwiotgbZgAQ4ck Tndi5R2mJtvwFQvj/3aeHllgtDDjV+MsuqxkheJ6Z9qnn4FSCZ3KBw9208GZHmixc8nK chqyZ7snwczdRF22yoF4qVJzfakXmCdM6tiVWGe5r4QW+WhKRylJfHeinBeQRe+vALN3 uep7HQQgp1iejBh/U8PNzMA2a5MCKhER3ZmeW76k4EnSwzPIvj5xr73V/h+sz6EokVVN edOg== MIME-Version: 1.0 X-Received: by 10.112.47.73 with SMTP id b9mr10038993lbn.46.1434578142620; Wed, 17 Jun 2015 14:55:42 -0700 (PDT) Content-Type: text/plain; charset=UTF-8 Sender: robomod@news.nic.it List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Approved: robomod@news.nic.it Lines: 63 Organization: linux.* mail to news gateway X-Original-Cc: Jens Axboe , Arianna Avanzini X-Original-Date: Thu, 18 Jun 2015 00:55:42 +0300 X-Original-Message-ID: X-Original-Sender: linux-kernel-owner@vger.kernel.org Xref: aioe.org linux.kernel:1167173 Hi All, I executed CRIU tests on the 4.1.0-rc8-next-20150617 kernel and met this bug. Maybe it will be interested for someone to look at it. [ 30.130897] BUG: unable to handle kernel NULL pointer dereference at 000000000000001c [ 30.130970] IP: [] cfq_print_leaf_weight+0x31/0x50 [ 30.131013] PGD 3b77a067 PUD 39883067 PMD 0 [ 30.131013] Oops: 0000 [#1] SMP [ 30.131013] Modules linked in: tun netlink_diag af_packet_diag udp_diag tcp_diag inet_diag unix_diag ppdev crct10dif_pclmul crc32_pclmul crc32c_intel ghash_clmulni_intel virtio_balloon serio_raw i2c_piix4 parport_pc parport virtio_blk virtio_net cirrus drm_kms_helper ttm drm virtio_pci virtio_ring virtio ata_generic pata_acpi [ 30.131013] CPU: 0 PID: 613 Comm: criu Not tainted 4.1.0-rc8-next-20150617 #1 [ 30.131013] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 30.131013] task: ffff880039eb0000 ti: ffff880039db0000 task.ti: ffff880039db0000 [ 30.131013] RIP: 0010:[] [] cfq_print_leaf_weight+0x31/0x50 [ 30.131013] RSP: 0018:ffff880039db3d08 EFLAGS: 00010286 [ 30.131013] RAX: 0000000000000000 RBX: ffff88003a524200 RCX: 0000000000000001 [ 30.131013] RDX: 0000000000000001 RSI: 0000000000000001 RDI: ffff88003a524800 [ 30.131013] RBP: ffff880039db3d18 R08: 0000000000000001 R09: 0000000000000000 [ 30.131013] R10: 0000000000000080 R11: 0000000000000000 R12: ffffffff81cba6c8 [ 30.131013] R13: 0000000000000001 R14: ffff880039db3f18 R15: ffff88003a524200 [ 30.131013] FS: 00007f2b6c495740(0000) GS:ffff88003d200000(0000) knlGS:0000000000000000 [ 30.131013] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 30.131013] CR2: 000000000000001c CR3: 000000003de3c000 CR4: 00000000000407f0 [ 30.131013] Stack: [ 30.131013] ffff880039db3d28 ffff88003a524200 ffff880039db3d48 ffffffff8113c9d3 [ 30.131013] ffff880039db3d58 0000000000000000 ffff880039773380 0000000000000001 [ 30.131013] ffff880039db3d58 ffffffff812b9df6 ffff880039db3dd8 ffffffff81257b7d [ 30.131013] Call Trace: [ 30.131013] [] cgroup_seqfile_show+0x43/0xc0 [ 30.131013] [] kernfs_seq_show+0x26/0x30 [ 30.131013] [] seq_read+0x10d/0x3c0 [ 30.131013] [] kernfs_fop_read+0x129/0x180 [ 30.131013] [] __vfs_read+0x37/0x100 [ 30.131013] [] ? security_file_permission+0xa3/0xc0 [ 30.131013] [] ? rw_verify_area+0x56/0xe0 [ 30.131013] [] vfs_read+0x86/0x130 [ 30.131013] [] SyS_read+0x58/0xd0 [ 30.131013] [] entry_SYSCALL_64_fastpath+0x12/0x76 [ 30.131013] Code: 48 89 e5 53 48 89 fb 48 83 ec 08 48 8b bf d8 00 00 00 e8 93 fe d7 ff 48 85 c0 74 0f 48 63 15 27 f0 8f 00 48 8b 84 d0 28 01 00 00 <8b> 50 1c 48 89 df 31 c0 48 c7 c6 f8 f8 ad 81 e8 1b b9 e9 ff 48 [ 30.131013] RIP [] cfq_print_leaf_weight+0x31/0x50 [ 30.131013] RSP [ 30.131013] CR2: 000000000000001c [ 30.142367] ---[ end trace bad3e020b932bbb1 ]--- -- 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/