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SubjectBUG: unable to handle kernel NULL pointer dereference at (null) / scsi_eh_0: page allocation failure: order:6, mode:0x20
Please CC me as I am not subscribed to the mailing list.

After this, the hard drives were inaccessible on the server and it had
to be sys-rq rebooted.

Kernel: 3.0.0
# gcc --version
gcc (Debian 4.3.2-1.1) 4.3.2


# as --version
GNU assembler (GNU Binutils for Debian) 2.18.0.20080103
This assembler was configured for a target of `x86_64-linux-gnu'.


[138321.660418] aacraid: Host adapter abort request (0,0,0,0)
[138321.660597] aacraid: Host adapter reset request. SCSI hang ?
[138381.804920] aacraid: SCSI bus appears hung
[138476.667838] scsi_eh_0: page allocation failure: order:6, mode:0x20
[138476.667841] Pid: 1073, comm: scsi_eh_0 Not tainted 3.0.0 #1
[138476.667843] Call Trace:
[138476.667850] [<ffffffff8108fd42>] ? warn_alloc_failed+0x112/0x127
[138476.667854] [<ffffffff8109049e>] ? __alloc_pages_nodemask+0x698/0x704
[138476.667858] [<ffffffff8108f3f1>] ? __get_free_pages+0x9/0x46
[138476.667862] [<ffffffff812fd9ea>] ? intel_alloc_coherent+0x83/0xdb
[138476.667866] [<ffffffff81387c35>] ? aac_fib_setup+0xf8/0x227
[138476.667868] [<ffffffff813879d5>] ? aac_init_adapter+0x7a9/0x7d7
[138476.667871] [<ffffffff8138c263>] ? aac_src_init+0x26b/0x3bb
[138476.667875] [<ffffffff810bdfc9>] ? add_partial+0x11/0x57
[138476.667877] [<ffffffff81388bf7>] ? _aac_reset_adapter+0x29e/0x465
[138476.667880] [<ffffffff81389c32>] ? aac_reset_adapter+0x10e/0x248
[138476.667882] [<ffffffff8138298e>] ? aac_eh_reset+0x154/0x17b
[138476.667887] [<ffffffff8136afe8>] ? scsi_try_host_reset+0x51/0xc5
[138476.667889] [<ffffffff8136c472>] ? scsi_eh_ready_devs+0x694/0x80e
[138476.667892] [<ffffffff8136cb52>] ? scsi_error_handler+0x3be/0x5c0
[138476.667894] [<ffffffff8136c794>] ? scsi_eh_get_sense+0x1a8/0x1a8
[138476.667898] [<ffffffff8104f09e>] ? kthread+0x7e/0x86
[138476.667902] [<ffffffff8159c6d4>] ? kernel_thread_helper+0x4/0x10
[138476.667905] [<ffffffff8104f020>] ? kthread_worker_fn+0x10d/0x10d
[138476.667907] [<ffffffff8159c6d0>] ? gs_change+0xb/0xb
[138476.667908] Mem-Info:
[138476.667910] Node 0 DMA per-cpu:
[138476.667912] CPU 0: hi: 0, btch: 1 usd: 0
[138476.667913] CPU 1: hi: 0, btch: 1 usd: 0
[138476.667915] CPU 2: hi: 0, btch: 1 usd: 0
[138476.667917] CPU 3: hi: 0, btch: 1 usd: 0
[138476.667919] CPU 4: hi: 0, btch: 1 usd: 0
[138476.667920] CPU 5: hi: 0, btch: 1 usd: 0
[138476.667922] CPU 6: hi: 0, btch: 1 usd: 0
[138476.667924] CPU 7: hi: 0, btch: 1 usd: 0
[138476.667925] CPU 8: hi: 0, btch: 1 usd: 0
[138476.667927] CPU 9: hi: 0, btch: 1 usd: 0
[138476.667929] CPU 10: hi: 0, btch: 1 usd: 0
[138476.667930] CPU 11: hi: 0, btch: 1 usd: 0
[138476.667932] CPU 12: hi: 0, btch: 1 usd: 0
[138476.667934] CPU 13: hi: 0, btch: 1 usd: 0
[138476.667935] CPU 14: hi: 0, btch: 1 usd: 0
[138476.667937] CPU 15: hi: 0, btch: 1 usd: 0
[138476.667938] Node 0 DMA32 per-cpu:
[138476.667940] CPU 0: hi: 186, btch: 31 usd: 180
[138476.667942] CPU 1: hi: 186, btch: 31 usd: 157
[138476.667944] CPU 2: hi: 186, btch: 31 usd: 47
[138476.667946] CPU 3: hi: 186, btch: 31 usd: 181
[138476.667947] CPU 4: hi: 186, btch: 31 usd: 0
[138476.667949] CPU 5: hi: 186, btch: 31 usd: 0
[138476.667951] CPU 6: hi: 186, btch: 31 usd: 0
[138476.667952] CPU 7: hi: 186, btch: 31 usd: 0
[138476.667954] CPU 8: hi: 186, btch: 31 usd: 162
[138476.667956] CPU 9: hi: 186, btch: 31 usd: 166
[138476.667957] CPU 10: hi: 186, btch: 31 usd: 164
[138476.667959] CPU 11: hi: 186, btch: 31 usd: 176
[138476.667961] CPU 12: hi: 186, btch: 31 usd: 24
[138476.667962] CPU 13: hi: 186, btch: 31 usd: 0
[138476.667964] CPU 14: hi: 186, btch: 31 usd: 0
[138476.667966] CPU 15: hi: 186, btch: 31 usd: 0
[138476.667967] Node 0 Normal per-cpu:
[138476.667969] CPU 0: hi: 186, btch: 31 usd: 162
[138476.667971] CPU 1: hi: 186, btch: 31 usd: 186
[138476.667972] CPU 2: hi: 186, btch: 31 usd: 153
[138476.667974] CPU 3: hi: 186, btch: 31 usd: 46
[138476.667976] CPU 4: hi: 186, btch: 31 usd: 97
[138476.667977] CPU 5: hi: 186, btch: 31 usd: 99
[138476.667979] CPU 6: hi: 186, btch: 31 usd: 58
[138476.667981] CPU 7: hi: 186, btch: 31 usd: 1
[138476.667982] CPU 8: hi: 186, btch: 31 usd: 46
[138476.667984] CPU 9: hi: 186, btch: 31 usd: 50
[138476.667985] CPU 10: hi: 186, btch: 31 usd: 181
[138476.667987] CPU 11: hi: 186, btch: 31 usd: 29
[138476.667989] CPU 12: hi: 186, btch: 31 usd: 0
[138476.667990] CPU 13: hi: 186, btch: 31 usd: 68
[138476.667992] CPU 14: hi: 186, btch: 31 usd: 58
[138476.667994] CPU 15: hi: 186, btch: 31 usd: 0
[138476.667995] Node 1 Normal per-cpu:
[138476.667997] CPU 0: hi: 186, btch: 31 usd: 99
[138476.667999] CPU 1: hi: 186, btch: 31 usd: 172
[138476.668001] CPU 2: hi: 186, btch: 31 usd: 110
[138476.668002] CPU 3: hi: 186, btch: 31 usd: 52
[138476.668004] CPU 4: hi: 186, btch: 31 usd: 157
[138476.668006] CPU 5: hi: 186, btch: 31 usd: 65
[138476.668008] CPU 6: hi: 186, btch: 31 usd: 78
[138476.668010] CPU 7: hi: 186, btch: 31 usd: 173
[138476.668011] CPU 8: hi: 186, btch: 31 usd: 0
[138476.668013] CPU 9: hi: 186, btch: 31 usd: 0
[138476.668014] CPU 10: hi: 186, btch: 31 usd: 8
[138476.668016] CPU 11: hi: 186, btch: 31 usd: 1
[138476.668018] CPU 12: hi: 186, btch: 31 usd: 157
[138476.668020] CPU 13: hi: 186, btch: 31 usd: 84
[138476.668021] CPU 14: hi: 186, btch: 31 usd: 91
[138476.668023] CPU 15: hi: 186, btch: 31 usd: 165
[138476.668028] active_anon:970040 inactive_anon:112827 isolated_anon:0
[138476.668029] active_file:3246082 inactive_file:3465017 isolated_file:35
[138476.668030] unevictable:945 dirty:23 writeback:94285 unstable:0
[138476.668030] free:227592 slab_reclaimable:128687
slab_unreclaimable:56834
[138476.668031] mapped:4490 shmem:2843 pagetables:20763 bounce:0
[138476.668033] Node 0 DMA free:15880kB min:40kB low:48kB high:60kB
active_anon:0kB inactive_anon:0kB active_file:0kB inactive_file:0kB
unevictable:0kB isolated(anon):0kB isolated(file):0kB present:15656kB
mlocked:0kB dirty:0kB writeback:0kB mapped:0kB shmem:0kB
slab_reclaimable:0kB slab_unreclaimable:0kB kernel_stack:0kB
pagetables:0kB unstable:0kB bounce:0kB writeback_tmp:0kB pages_scanned:0
all_unreclaimable? yes
[138476.668043] lowmem_reserve[]: 0 2991 16121 16121
[138476.668046] Node 0 DMA32 free:103184kB min:8344kB low:10428kB
high:12516kB active_anon:574636kB inactive_anon:144044kB
active_file:1032176kB inactive_file:1057608kB unevictable:384kB
isolated(anon):0kB isolated(file):0kB present:3063520kB mlocked:384kB
dirty:0kB writeback:17400kB mapped:48kB shmem:0kB
slab_reclaimable:91152kB slab_unreclaimable:97176kB kernel_stack:1280kB
pagetables:2628kB unstable:0kB bounce:0kB writeback_tmp:0kB
pages_scanned:0 all_unreclaimable? no
[138476.668056] lowmem_reserve[]: 0 0 13130 13130
[138476.668058] Node 0 Normal free:302680kB min:36632kB low:45788kB
high:54948kB active_anon:1844360kB inactive_anon:184904kB
active_file:4910564kB inactive_file:5760864kB unevictable:1300kB
isolated(anon):0kB isolated(file):140kB present:13445120kB
mlocked:1300kB dirty:28kB writeback:27132kB mapped:7096kB shmem:5172kB
slab_reclaimable:193112kB slab_unreclaimable:63508kB kernel_stack:1880kB
pagetables:58580kB unstable:0kB bounce:0kB writeback_tmp:0kB
pages_scanned:32 all_unreclaimable? no
[138476.668069] lowmem_reserve[]: 0 0 0 0
[138476.668071] Node 1 Normal free:489244kB min:45088kB low:56360kB
high:67632kB active_anon:1461164kB inactive_anon:122360kB
active_file:7041588kB inactive_file:7041092kB unevictable:2096kB
isolated(anon):0kB isolated(file):0kB present:16547840kB mlocked:2096kB
dirty:64kB writeback:332608kB mapped:10816kB shmem:6200kB
slab_reclaimable:230484kB slab_unreclaimable:66652kB kernel_stack:776kB
pagetables:21844kB unstable:0kB bounce:0kB writeback_tmp:0kB
pages_scanned:69 all_unreclaimable? no
[138476.668082] lowmem_reserve[]: 0 0 0 0
[138476.668084] Node 0 DMA: 0*4kB 1*8kB 0*16kB 0*32kB 2*64kB 1*128kB
1*256kB 0*512kB 1*1024kB 1*2048kB 3*4096kB = 15880kB
[138476.668091] Node 0 DMA32: 6456*4kB 4893*8kB 2133*16kB 134*32kB
1*64kB 1*128kB 0*256kB 0*512kB 0*1024kB 0*2048kB 0*4096kB = 103576kB
[138476.668098] Node 0 Normal: 34828*4kB 10905*8kB 4332*16kB 211*32kB
0*64kB 0*128kB 0*256kB 0*512kB 1*1024kB 0*2048kB 0*4096kB = 303640kB
[138476.668105] Node 1 Normal: 53146*4kB 21707*8kB 5935*16kB 264*32kB
0*64kB 0*128kB 0*256kB 0*512kB 0*1024kB 0*2048kB 0*4096kB = 489648kB
[138476.668113] 6714269 total pagecache pages
[138476.668114] 207 pages in swap cache
[138476.668116] Swap cache stats: add 30314, delete 30107, find 48439/49664
[138476.668117] Free swap = 7975932kB
[138476.668118] Total swap = 7999416kB
[138476.777700] 8388592 pages RAM
[138476.777702] 119966 pages reserved
[138476.777703] 2963225 pages shared
[138476.777704] 5620884 pages non-shared
[138496.749132] aacraid: Host adapter abort request (0,0,0,0)
[138506.733854] aacraid: Host adapter abort request (0,0,1,0)
[138506.733917] aacraid: Host adapter reset request. SCSI hang ?
[138506.734001] AAC: Host adapter BLINK LED 0x10
[138506.734033] BUG: unable to handle kernel NULL pointer dereference at
(null)
[138506.734092] IP: [<ffffffff810542ac>] exit_creds+0x12/0x78
[138506.734131] PGD 42dd36067 PUD 42d47e067 PMD 0
[138506.734174] Oops: 0000 [#1] SMP
[138506.734210] CPU 10
[138506.734219] Modules linked in: i2c_i801 evdev i2c_core button [last
unloaded: scsi_wait_scan]
[138506.734319]
[138506.734342] Pid: 1073, comm: scsi_eh_0 Not tainted 3.0.0 #1
Supermicro X8DTH-i/6/iF/6F/X8DTH
[138506.734408] RIP: 0010:[<ffffffff810542ac>] [<ffffffff810542ac>]
exit_creds+0x12/0x78
[138506.734463] RSP: 0000:ffff88042e9f7b30 EFLAGS: 00010287
[138506.734493] RAX: 0000000000000000 RBX: ffff88042f491700 RCX:
ffff88042fa19000
[138506.734541] RDX: 0000000000000432 RSI: 0000000000000000 RDI:
0000000000000000
[138506.734589] RBP: ffff88042f491700 R08: 000000000010c8c7 R09:
0000000000000000
[138506.734637] R10: 0000000000000000 R11: 0000000000000000 R12:
0000000000000000
[138506.734685] R13: ffff88042fa19450 R14: ffff88042fa194b0 R15:
ffff88042fa19000
[138506.734733] FS: 0000000000000000(0000) GS:ffff88043fcc0000(0000)
knlGS:0000000000000000
[138506.734783] CS: 0010 DS: 0000 ES: 0000 CR0: 000000008005003b
[138506.734814] CR2: 0000000000000000 CR3: 000000042e35e000 CR4:
00000000000006e0
[138506.734862] DR0: 0000000000000000 DR1: 0000000000000000 DR2:
0000000000000000
[138506.734910] DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7:
0000000000000400
[138506.734959] Process scsi_eh_0 (pid: 1073, threadinfo
ffff88042e9f6000, task ffff88042f492840)
[138506.735010] Stack:
[138506.735033] ffff88042f491700 ffffffff81035758 ffff88042f491710
ffffffff8104f21d
[138506.735101] ffff88042fa19000 0000000000000000 ffff88042fa19450
ffffffff813889be
[138506.735166] ffff88042ea16f90 00000000000000ef 0000000000002002
ffff88042fa19000
[138506.735231] Call Trace:
[138506.735259] [<ffffffff81035758>] ? __put_task_struct+0x5d/0x83
[138506.735291] [<ffffffff8104f21d>] ? kthread_stop+0x7b/0xac
[138506.735324] [<ffffffff813889be>] ? _aac_reset_adapter+0x65/0x465
[138506.735356] [<ffffffff81389051>] ? aac_check_health+0x293/0x2f4
[138506.735388] [<ffffffff813828bb>] ? aac_eh_reset+0x81/0x17b
[138506.735420] [<ffffffff8136afe8>] ? scsi_try_host_reset+0x51/0xc5
[138506.735452] [<ffffffff8136bb8f>] ? scsi_send_eh_cmnd+0x225/0x28d
[138506.735485] [<ffffffff81042223>] ? del_timer_sync+0x34/0x3e
[138506.735517] [<ffffffff81599c31>] ? schedule_timeout+0x1dc/0x1fc
[138506.735549] [<ffffffff81042333>] ? del_timer+0xb1/0xb1
[138506.735579] [<ffffffff8136bc85>] ? scsi_eh_tur+0x28/0x78
[138506.735609] [<ffffffff8136bd32>] ? scsi_eh_test_devices+0x5d/0x109
[138506.735641] [<ffffffff8136c552>] ? scsi_eh_ready_devs+0x774/0x80e
[138506.735673] [<ffffffff8136cb52>] ? scsi_error_handler+0x3be/0x5c0
[138506.735705] [<ffffffff8136c794>] ? scsi_eh_get_sense+0x1a8/0x1a8
[138506.735736] [<ffffffff8104f09e>] ? kthread+0x7e/0x86
[138506.735768] [<ffffffff8159c6d4>] ? kernel_thread_helper+0x4/0x10
[138506.735800] [<ffffffff8104f020>] ? kthread_worker_fn+0x10d/0x10d
[138506.735832] [<ffffffff8159c6d0>] ? gs_change+0xb/0xb
[138506.743720] Code: ff 4d 00 0f 94 c0 84 c0 74 08 48 89 ef e8 60 fd ff
ff 31 c0 5b 5d 41 5c c3 53 48 89 fb 48 8b 87 00 03 00 00 48 8b bf f8 02
00 00 <8b> 00 48 c7 83 f8 02 00 00 00 00 00 00 f0 ff 0f 0f 94 c0 84 c0
[138506.744099] RIP [<ffffffff810542ac>] exit_creds+0x12/0x78
[138506.744134] RSP <ffff88042e9f7b30>
[138506.744160] CR2: 0000000000000000
[138506.744743] ---[ end trace 82be210c3648ecce ]---



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