[ 5721.771596] BUG: unable to handle kernel NULL pointer dereference at 0000000000000070 [ 5721.772542] IP: [<ffffffff8125fdff>] elv_may_queue+0xb/0x1a [ 5721.772542] PGD 1e6fb067 PUD 1a0f3067 PMD 0 [ 5721.772542] Oops: 0000 [#1] PREEMPT SMP [ 5721.772542] last sysfs file: /sys/devices/pci0000:00/0000:00:1a.0/modalias [ 5721.772542] CPU 3 [ 5721.772542] Modules linked in: ppp_deflate bsd_comp ppp_async option usb_wwan ipt_LOG xt_state iptable_filter ipt_MASQUERADE ipt_REDIRECT iptable_nat nf_nat nf_conntrack_ipv4 nf_defrag_ipv4 xt_DSCP xt_dscp xt_string xt_owner xt_NFQUEUE xt_multiport xt_mark xt_iprange xt_hashlimit xt_conntrack xt_connmark oss_hdaudio osscore vhba vboxnetadp vboxnetflt vboxdrv tun nvidia(P) nvidiafb fb_ddc vgastate [ 5721.772542] [ 5721.772542] Pid: 14586, comm: k3b Tainted: P W 2.6.39-gentoo-r3 #1 Gigabyte Technology Co., Ltd. P35T-DS3P/P35T-DS3P [ 5721.772542] RIP: 0010:[<ffffffff8125fdff>] [<ffffffff8125fdff>] elv_may_queue+0xb/0x1a [ 5721.772542] RSP: 0018:ffff8800620a9af8 EFLAGS: 00010096 [ 5721.772542] RAX: 0000000000000000 RBX: ffff88007c33a048 RCX: 0000000000000010 [ 5721.772542] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffff88007c33a048 [ 5721.772542] RBP: ffff8800620a9af8 R08: 0000000000000000 R09: ffff8800625a5e40 [ 5721.772542] R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000000 [ 5721.772542] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000001 [ 5721.772542] FS: 00007f6bd1920760(0000) GS:ffff88007fd80000(0000) knlGS:0000000000000000 [ 5721.772542] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 5721.772542] CR2: 0000000000000070 CR3: 0000000057f9f000 CR4: 00000000000006e0 [ 5721.772542] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 5721.772542] DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400 [ 5721.772542] Process k3b (pid: 14586, threadinfo ffff8800620a8000, task ffff88007c039920) [ 5721.772542] Stack: [ 5721.772542] ffff8800620a9b58 ffffffff812637b7 000000000000003e ffff88007cfc0b70 [ 5721.772542] 00000010620a9b48 ffff88006255a368 ffff88007cfc0b70 ffff88007c33a048 [ 5721.823002] ffff8800620a9b78 0000000000000000 ffff8800620a9b90 0000000000000000 [ 5721.823002] Call Trace: [ 5721.823002] [<ffffffff812637b7>] get_request+0x2d/0x326 [ 5721.823002] [<ffffffff81263add>] get_request_wait+0x2d/0x131 [ 5721.823002] [<ffffffff810b1fe3>] ? unlock_page+0x25/0x2a [ 5721.823002] [<ffffffff81263ecd>] blk_get_request+0x3c/0x6d [ 5721.823002] [<ffffffff81341038>] scsi_execute+0x3d/0x143 [ 5721.823002] [<ffffffff813411c0>] scsi_execute_req+0x82/0xb4 [ 5721.823002] [<ffffffff8133c34b>] T.679+0x3a/0xef [ 5721.823002] [<ffffffff8133c454>] scsi_set_medium_removal+0x54/0x8f [ 5721.823002] [<ffffffff8134c185>] sr_lock_door+0x1b/0x1d [ 5721.823002] [<ffffffff8138607c>] cdrom_release+0x18c/0x1fe [ 5721.823002] [<ffffffff8134b734>] sr_block_release+0x2b/0x48 [ 5721.823002] [<ffffffff81105251>] __blkdev_put+0x9d/0x155 [ 5721.823002] [<ffffffff81105405>] blkdev_put+0xfc/0x105 [ 5721.823002] [<ffffffff8110542d>] blkdev_close+0x1f/0x21 [ 5721.823002] [<ffffffff810de442>] fput+0xf8/0x1a5 [ 5721.823002] [<ffffffff810db34d>] filp_close+0x6d/0x78 [ 5721.823002] [<ffffffff810db400>] sys_close+0xa8/0xe2 [ 5721.823002] [<ffffffff8156483b>] system_call_fastpath+0x16/0x1b [ 5721.823002] Code: 00 31 c0 c9 c3 55 48 8b 47 18 48 89 e5 48 8b 00 48 8b 40 68 48 85 c0 74 05 48 89 f7 ff d0 c9 c3 55 48 8b 47 18 48 89 e5 48 8b 00 [ 5721.823002] 8b 50 70 31 c0 48 85 d2 74 02 ff d2 c9 c3 55 8b 46 40 48 89 [ 5721.823002] RIP [<ffffffff8125fdff>] elv_may_queue+0xb/0x1a [ 5721.823002] RSP <ffff8800620a9af8> [ 5721.823002] CR2: 0000000000000070 [ 5721.823002] ---[ end trace 5200473f8f25ac2a ]---