My Oracle Support Banner

Exadata DomU Crashed with "BUG: unable to handle kernel NULL pointer dereference at 00000000000000d8" (Doc ID 2629377.1)

Last updated on MAY 26, 2021

Applies to:

Oracle VM - Version 3.4.4 and later
Linux x86-64

Symptoms

Exadata DOMU rebooted unexpectedly, below call trace is seen in memory dump.

crash64>log
[15122860.718441] RAX: 0000000000000000 RBX: ffff8894ab1e7c00 RCX: 0000000000000000
[15122860.718441] RDX: ffff8829301efdc8 RSI: 0000000000000000 RDI: ffff8894ab1e7c00
[15122860.718441] RBP: ffff8829301efd18 R08: 0000000000000003 R09: ffff8849a9e1cfc0
[15122860.718441] R10: 0000000000000086 R11: 0000000000000246 R12: 0000000000000003
[15122860.718441] R13: ffff8849abdcb2d0 R14: ffff8894ab1f0c00 R15: ffff8849a9e1cfc0
[15122860.718441] FS: 0000000000000000(0000) GS:ffff8849e3140000(0000) knlGS:0000000000000000
[15122860.718441] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[15122860.718441] CR2: 00000000000000d8 CR3: 00000067ced94000 CR4: 0000000000160670
[15122860.718441] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[15122860.718441] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[15122860.718441] Stack:
[15122860.718441] ffff8829301efd18 0000000000000018 ffff8829301efd28 ffffffff812fdeb1
[15122860.718441] ffff8829301efd88 ffffffff813004a7 ffff8829301efd98 ffff8829301efdc8
[15122860.718441] ffffffff812fde60 0000000300000000 ffff8829301efdd8 ffff8849abdcb2c0
[15122860.718441] Call Trace:
[15122860.718441] [<ffffffff812fdeb1>] blk_mq_check_expired+0x51/0x90
[15122860.718441] [<ffffffff813004a7>] bt_for_each+0xe7/0xf0
[15122860.718441] [<ffffffff812fde60>] ? blk_mq_rq_timed_out+0x90/0x90
[15122860.718441] [<ffffffff812fde60>] ? blk_mq_rq_timed_out+0x90/0x90
[15122860.718441] [<ffffffff81300506>] blk_mq_tag_busy_iter+0x56/0x60
[15122860.718441] [<ffffffff812fc57b>] blk_mq_timeout_work+0x8b/0x150
[15122860.718441] [<ffffffff8109ddf1>] process_one_work+0x161/0x490
[15122860.718441] [<ffffffff8109e97b>] worker_thread+0x5b/0x540
[15122860.718441] [<ffffffff8109e920>] ? rescuer_thread+0x380/0x380
[15122860.718441] [<ffffffff810a409b>] kthread+0xcb/0xf0
[15122860.718441] [<ffffffff810a3fd0>] ? kthread_create_on_node+0x180/0x180
[15122860.718441] [<ffffffff816b1a78>] ret_from_fork+0x58/0x90
[15122860.718441] [<ffffffff810a3fd0>] ? kthread_create_on_node+0x180/0x180
[15122860.718441] Code: 0f ba 6f 50 00 72 0b 89 b7 04 01 00 00 e8 d4 fe ff ff 5d c3 66 90 55 48 89 e5 53 48 83 ec 08 0f 1f 44 00 00 48 8b 47 30 48 89 fb <48> 8b 90 d8 00 00 00 48 8b 47 50 a8 02 74 2e 48 8b 42 10 48 85
[15122861.024308] RIP [<ffffffff812fdde5>] blk_mq_rq_timed_out+0x15/0x90
[15122861.024308] RSP <ffff8829301efd08>
[15122861.024308] CR2: 00000000000000d8

Changes

 No changes

Cause

To view full details, sign in with your My Oracle Support account.

Don't have a My Oracle Support account? Click to get started!


In this Document
Symptoms
Changes
Cause
Solution
References


My Oracle Support provides customers with access to over a million knowledge articles and a vibrant support community of peers and Oracle experts.