Ever since I upgraded to 2.6.34-r1, I've been getting kernel bugs whenever I stop a md array after doing my backups. Last night I got a kernel BUG last night after stopping an md device. I had to reboot as I could not do anything with the machine. Here's the following dmesg output: Jul 29 13:17:20 lithium kernel: md: md0 stopped. Jul 29 13:17:20 lithium kernel: md: unbind<sdb1> Jul 29 13:17:20 lithium kernel: md: export_rdev(sdb1) Jul 29 13:17:20 lithium kernel: md: unbind<sdc1> Jul 29 13:17:20 lithium kernel: md: export_rdev(sdc1) Jul 29 13:17:20 lithium kernel: md0: detected capacity change from 360086110208 to 0 Jul 29 13:17:20 lithium kernel: BUG: unable to handle kernel paging request at 6b736964 Jul 29 13:17:20 lithium kernel: IP: [<c11c76da>] strcmp+0x7/0x19 Jul 29 13:17:20 lithium kernel: *pde = 00000000 Jul 29 13:17:20 lithium kernel: Oops: 0000 [#1] PREEMPT SMP Jul 29 13:17:20 lithium kernel: last sysfs file: /sys/devices/virtual/block/md0/md/array_state Jul 29 13:17:20 lithium kernel: Modules linked in: linear bridge stp rndis_host cdc_ether usbnet xt_tcpudp xt_state ipt_LOG rfcomm l2cap bluetooth ipv6 iptable_filter iptable_nat nf_nat nf_conntrack_ipv4 nf_defrag_ipv4 ipt_addrtype xt_DSCP xt_dscp xt_string xt_NFQUEUE xt_multiport xt_MARK xt_mark xt_iprange xt_hashlimit xt_conntrack xt_CONNMARK xt_connmark nf_conntrack ip_tables x_tables snd_seq snd_seq_device snd_pcm_oss snd_mixer_oss ppdev lp arc4 pcmcia ecb b43 mac80211 snd_intel8x0 cfg80211 snd_ac97_codec nouveau ac97_bus ttm snd_pcm drm_kms_helper b44 rfkill intel_agp snd_timer drm snd yenta_socket rsrc_nonstatic video backlight i2c_algo_bit rtc_cmos rtc_core dcdbas ssb snd_page_alloc output i2c_core mii agpgart processor pcmcia_core rtc_lib pcspkr battery button thermal rng_core ac joydev tg3 libphy e1000 fuse nfs auth_rpcgss lockd sunrpc raid10 raid1 raid0 md_mod dm_snapshot dm_crypt dm_mirror dm_region_hash dm_log dm_mod scsi_wait_scan sbp2 ohci1394 ieee1394 sl811_hcd usbhid ohci_hcd uhci_hcd usb_storage ehci_hcd usbcore lpfc scsi_transport_fc megaraid_mbox megaraid_mm aacraid sx8 DAC960 cciss 3w_9xxx 3w_xxxx atp870u dc395x sim710 53c700 qla1280 imm parport dmx3191d sym53c8xx qlogicfas408 gdth aha1740 initio BusLogic aic7xxx aic79xx scsi_transport_spi sg [last unloaded: vmnet] Jul 29 13:17:20 lithium kernel: Jul 29 13:17:20 lithium kernel: Pid: 10, comm: events/1 Not tainted 2.6.34-gentoo-r1 #1 0W0941/Inspiron 5150 Jul 29 13:17:20 lithium kernel: EIP: 0060:[<c11c76da>] EFLAGS: 00010286 CPU: 1 ul 29 13:17:20 lithium kernel: EIP is at strcmp+0x7/0x19 Jul 29 13:17:20 lithium kernel: EAX: f8f0ed6c EBX: efdd9a30 ECX: 00000000 EDX: 6b736964 Jul 29 13:17:20 lithium kernel: ESI: f8f0ede1 EDI: 6b736964 EBP: d003242c ESP: f7057f48 Jul 29 13:17:20 lithium kernel: DS: 007b ES: 007b FS: 00d8 GS: 0000 SS: 0068 Jul 29 13:17:20 lithium kernel: Process events/1 (pid: 10, ti=f7057000 task=f704d3e0 task.ti=f7057000) Jul 29 13:17:20 lithium kernel: Stack: Jul 29 13:17:20 lithium kernel: 6b736964 eac2e680 c10b1638 efdd9a04 efdd9a04 c10b1665 6b736964 d00325d4 Jul 29 13:17:20 lithium kernel: <0> c10b2aa8 d00325d4 d0032400 d003242c d00325d4 f8f052c4 c2a08f00 f704d3e0 Jul 29 13:17:20 lithium kernel: <0> d00325d8 c1033db9 f8f0528c c2a08f04 c2a08f0c f704d5e0 00000000 f704d3e0 Jul 29 13:17:20 lithium kernel: Call Trace: Jul 29 13:17:20 lithium kernel: [<c10b1638>] ? sysfs_find_dirent+0x13/0x23 Jul 29 13:17:20 lithium kernel: [<c10b1665>] ? sysfs_get_dirent+0x1d/0x4a Jul 29 13:17:20 lithium kernel: [<c10b2aa8>] ? sysfs_remove_group+0x18/0x9c Jul 29 13:17:20 lithium kernel: [<f8f052c4>] ? mddev_delayed_delete+0x38/0x7b [md_mod] Jul 29 13:17:20 lithium kernel: [<c1033db9>] ? worker_thread+0xd6/0x15a Jul 29 13:17:20 lithium kernel: [<f8f0528c>] ? mddev_delayed_delete+0x0/0x7b [md_mod] Jul 29 13:17:20 lithium kernel: [<c1036630>] ? autoremove_wake_function+0x0/0x29 Jul 29 13:17:20 lithium kernel: [<c1033ce3>] ? worker_thread+0x0/0x15a Jul 29 13:17:20 lithium kernel: [<c1036337>] ? kthread+0x5f/0x64 Jul 29 13:17:20 lithium kernel: [<c10362d8>] ? kthread+0x0/0x64 Jul 29 13:17:20 lithium kernel: [<c1002b36>] ? kernel_thread_helper+0x6/0x10 Jul 29 13:17:20 lithium kernel: Code: c3 89 cd 89 d6 89 c7 31 c0 83 c9 ff f2 ae 4f 89 e9 49 78 06 ac aa 84 c0 75 f7 31 c0 aa 89 d8 5b 5e 5f 5d c3 57 56 89 c6 89 d7 ac <ae> 75 08 84 c0 75 f8 31 c0 eb 04 19 c0 0c 01 5e 5f c3 57 56 89 Jul 29 13:17:20 lithium kernel: EIP: [<c11c76da>] strcmp+0x7/0x19 SS:ESP 0068:f7057f48 Jul 29 13:17:20 lithium kernel: CR2: 000000006b736964 Jul 29 13:17:20 lithium kernel: ---[ end trace 3ac7a01cafe75bda ]--- This happens with mdadm from sys-fs/mdadm 2.0.
Do you use sys-kernel/gentoo-sources?
Sorry, yes that's right, I do use gentoo-sources-2.6.34-r1.
Greetings, please try this patch and see if it fixes your problem: http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commitdiff;h=ef2f80ff7325b2c1888ff02ead28957b5840bf51
Good news, the patch solved the problem. Many thanks! Any chances you can get this patch into the upcoming next kernel stabilization (2.6.34) as soon as possible? Many thanks for your help!
(In reply to comment #4) > Good news, the patch solved the problem. Many thanks! Any chances you can get > this patch into the upcoming next kernel stabilization (2.6.34) as soon as > possible? > > Many thanks for your help! > I added the patch to the genpatches trunk. It will get shipped with the next gentoo-sources-2.6.34 release. Thanks for the bug report.
Released in gentoo-sources-2.6.34-r4
