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Date: Thu, 30 Oct 2008 19:30:22 +0100 From: Milan Broz <mbroz@...hat.com> To: Wesley Leggette <wleggette@...lix.net> CC: linux-kernel@...r.kernel.org, Mikulas Patocka <mpatocka@...hat.com> Subject: Re: Kernel panic in kcryptd Wesley Leggette wrote: > When performing large IO, seemingly only when over the network, I > receive a kernel panic that seems to be happening in the kcryptd module. > > Here's two scenarios I've encountered this: > > ietd -> kcryptd -> mdadm raid6 iscsi over dm crypt over mdadm? And I see snapshots in the log too, isn't there snapshot under the crypt mapping? Is it reproducible without snapshots involved? Maybe it is related to recently fixed problem there... I think these patches solves the snapshot crashes (cc Mikulas) http://www.kernel.org/pub/linux/kernel/people/agk/patches/2.6/2.6.27/dm-snapshot-fix-primary_pe-race.patch http://www.kernel.org/pub/linux/kernel/people/agk/patches/2.6/editing/dm-snapshot-wait-for-chunks-in-destructor.patch Milan > Linux version 2.6.26-bpo.1-686-bigmem (Debian 2.6.26-4~bpo40+1) (nobse@...ian.org > ) (gcc version 4.1.2 20061115 (prerelease) (Debian 4.1.1-21)) #1 SMP > Tue Sep 2 18:42:50 UTC 2008 > > > > Oct 29 04:55:15 fargo kernel: [4285317.219492] ------------[ cut > here ]------------ > Oct 29 04:55:15 fargo kernel: [4285317.219492] kernel BUG at mm/slab.c: > 3008! > Oct 29 04:55:15 fargo kernel: [4285317.219492] invalid opcode: 0000 > [#1] SMP > Oct 29 04:55:15 fargo kernel: [4285317.219492] Modules linked in: > usb_storage iscsi_trgt crc32c libcrc32c ipv6 ib_iser > rdma_cm ib_cm iw_cm ib_sa ib_mad ib_core ib_addr iscsi_tcp libiscsi > scsi_transport_iscsi ac battery xt_tcpudp nf_conn > track_ipv4 xt_state nf_conntrack iptable_filter ip_tables x_tables > ext3 jbd mbcache loop snd_hda_intel i2c_i801 i2c_co > re snd_pcm snd_timer snd soundcore iTCO_wdt intel_agp agpgart button > snd_page_alloc parport_pc parport evdev pcspkr fl > oppy reiserfs sha256_generic aes_i586 aes_generic cbc dm_crypt > crypto_blkcipher dm_mirror dm_log dm_snapshot dm_mod ra > id456 async_xor async_memcpy async_tx xor raid1 md_mod ide_generic > jmicron ide_core sd_mod sata_promise ata_generic ah > ci r8169 libata scsi_mod uhci_hcd dock ehci_hcd usbcore thermal > processor fan thermal_sys [last unloaded: libcrc32c] > Oct 29 04:55:15 fargo kernel: [4285317.219492] > Oct 29 04:55:15 fargo kernel: [4285317.219492] Pid: 4191, comm: > kcryptd Not tainted (2.6.26-bpo.1-686-bigmem #1) > Oct 29 04:55:15 fargo kernel: [4285317.219492] EIP: 0060:[<c017b8e8>] > EFLAGS: 00010046 CPU: 0 > Oct 29 04:55:15 fargo kernel: [4285317.219492] EIP is at > cache_alloc_refill+0xeb/0x48b > Oct 29 04:55:15 fargo kernel: [4285317.219492] EAX: 0000003b EBX: > 00000012 ECX: f6d4d1c0 EDX: df32c000 > Oct 29 04:55:15 fargo kernel: [4285317.219492] ESI: c0878000 EDI: > 00000012 EBP: f540cac0 ESP: e70b5d78 > Oct 29 04:55:15 fargo kernel: [4285317.219492] DS: 007b ES: 007b FS: > 00d8 GS: 0000 SS: 0068 > Oct 29 04:55:15 fargo kernel: [4285317.219492] Process kcryptd (pid: > 4191, ti=e70b4000 task=f696ba00 task.ti=e70b4000) > Oct 29 04:55:15 fargo kernel: [4285317.219492] Stack: 00000000 > 0000003b 00011200 f6d4d1c0 f5443e00 00000000 c0136139 f > 51011ec > Oct 29 04:55:15 fargo kernel: [4285317.219492] e70b5de8 > 00000202 c0136194 00000000 f6d4d1c0 00000206 00011200 c > 017b7b6 > Oct 29 04:55:15 fargo kernel: [4285317.219492] 00000000 > f540ca80 00000000 00011210 c015f909 f8935be2 df32c4c8 f > 6430e40 > Oct 29 04:55:15 fargo kernel: [4285317.219492] Call Trace: > Oct 29 04:55:15 fargo kernel: [4285317.219492] [<c0136139>] > __queue_work+0x1c/0x28 > Oct 29 04:55:15 fargo kernel: [4285317.219492] [<c0136194>] queue_work > +0x33/0x3c > Oct 29 04:55:15 fargo kernel: [4285317.219492] [<c017b7b6>] > kmem_cache_alloc+0x47/0x8e > Oct 29 04:55:15 fargo kernel: [4285317.219492] [<c015f909>] > mempool_alloc+0x1c/0xba > Oct 29 04:55:15 fargo kernel: [4285317.219492] [<f8935be2>] > copy_callback+0x0/0x2c [dm_snapshot] > Oct 29 04:55:15 fargo kernel: [4285317.219492] [<f893533e>] > __find_pending_exception+0x62/0x122 [dm_snapshot] > Oct 29 04:55:15 fargo kernel: [4285317.219492] [<f89355c1>] origin_map > +0x105/0x23f [dm_snapshot] > Oct 29 04:55:15 fargo kernel: [4285317.219492] [<f89064e2>] __map_bio > +0x4d/0x12a [dm_mod] > Oct 29 04:55:15 fargo kernel: [4285317.219492] [<f8906309>] clone_bio > +0x3f/0x6f [dm_mod] > Oct 29 04:55:15 fargo kernel: [4285317.219492] [<f8906ff1>] > __split_bio+0x156/0x3f7 [dm_mod] > Oct 29 04:55:15 fargo kernel: [4285317.219492] [<f896e33f>] > crypto_cbc_encrypt+0x12b/0x13f [cbc] > Oct 29 04:55:15 fargo kernel: [4285317.219492] [<f894d6d8>] > aes_encrypt+0x0/0xc [aes_i586] > Oct 29 04:55:15 fargo kernel: [4285317.219492] [<f89076ff>] dm_request > +0xd3/0xf2 [dm_mod] > Oct 29 04:55:15 fargo kernel: [4285317.219492] [<c01dc365>] > generic_make_request+0x34d/0x37b > Oct 29 04:55:15 fargo kernel: [4285317.219492] [<f89488a9>] > crypt_convert+0x20f/0x240 [dm_crypt] > Oct 29 04:55:15 fargo kernel: [4285317.219492] [<f8948a98>] > kcryptd_crypt+0x1be/0x267 [dm_crypt] > Oct 29 04:55:15 fargo kernel: [4285317.219492] [<f89488da>] > kcryptd_crypt+0x0/0x267 [dm_crypt] > Oct 29 04:55:15 fargo kernel: [4285317.219492] [<c0135d32>] > run_workqueue+0x74/0xf2 > Oct 29 04:55:15 fargo kernel: [4285317.219492] [<c013640d>] > worker_thread+0x0/0xbd > Oct 29 04:55:15 fargo kernel: [4285317.219492] [<c01364c0>] > worker_thread+0xb3/0xbd > Oct 29 04:55:15 fargo kernel: [4285317.219492] [<c01386ac>] > autoremove_wake_function+0x0/0x2d > Oct 29 04:55:15 fargo kernel: [4285317.219492] [<c01385eb>] kthread > +0x38/0x5d > Oct 29 04:55:15 fargo kernel: [4285317.219492] [<c01385b3>] kthread > +0x0/0x5d > Oct 29 04:55:15 fargo kernel: [4285317.219492] [<c01094ff>] > kernel_thread_helper+0x7/0x10 > Oct 29 04:55:15 fargo kernel: [4285317.219492] ======================= > Oct 29 04:55:15 fargo kernel: [4285317.219492] Code: 8b 75 00 39 ee 75 > 15 8b 75 10 8d 45 10 c7 45 34 01 00 00 00 39 c6 > 0f 84 a5 00 00 00 8b 4c 24 0c 8b 81 98 00 00 00 39 46 10 72 37 <0f> > 0b eb fe 8b 44 24 10 8b 5e 14 8b 08 8b 44 24 0c 8 > b 90 8c 00 > Oct 29 04:55:15 fargo kernel: [4285317.219492] EIP: [<c017b8e8>] > cache_alloc_refill+0xeb/0x48b SS:ESP 0068:e70b5d78 > Oct 29 04:55:15 fargo kernel: [4285317.219492] ---[ end trace > 0bb16d783d7c2616 ]--- -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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