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NULL Pointer Dereference on o2dlm_blocking_ast_wrapper (Doc ID 2013065.1)

Last updated on AUGUST 04, 2018

Applies to:

Linux OS - Version Oracle Linux 5.8 with Unbreakable Enterprise Kernel [2.6.39] to Oracle Linux 5.11 with Unbreakable Enterprise Kernel [2.6.39] [Release OL5U8 to OL5U11]
Linux x86-64
Linux x86

Symptoms

DATE: Tue Sep 9 07:08:48 2014 

UPTIME: 1 days, 21:18:30
LOAD AVERAGE: 3.31, 3.44, 3.60
TASKS: 1599
NODENAME: XXXXX
RELEASE: 2.6.39-400.215.2.el5uek
VERSION: #1 SMP Fri Jun 6 13:02:57 PDT 2014
MACHINE: x86_64 (2400 Mhz)
MEMORY: 128 GB
PANIC: "Oops: 0000 [#1] SMP " (check log for details)
PID: 22215
COMMAND: "kworker/u:4"
TASK: ffff88195e43a200 [THREAD_INFO: ffff881975b98000]
.
crash64> bt
PID: 22215 TASK: ffff88195e43a200 CPU: 5 COMMAND: "kworker/u:4"
#0 [ffff881975b99820] machine_kexec at ffffffff8103b47d
#1 [ffff881975b99890] crash_kexec at ffffffff810b9b05
#2 [ffff881975b99960] oops_end at ffffffff81509598
#3 [ffff881975b99990] no_context at ffffffff81048dff
#4 [ffff881975b999d0] __bad_area_nosemaphore at ffffffff81048f80
#5 [ffff881975b99a20] bad_area_nosemaphore at ffffffff81049183
#6 [ffff881975b99a30] do_page_fault at ffffffff8150c0ee
#7 [ffff881975b99b40] page_fault at ffffffff81508b15
[exception RIP: o2dlm_blocking_ast_wrapper+13]
RIP: ffffffffa082002d RSP: ffff881975b99bf0 RFLAGS: 00010246
RAX: 0000000000000000 RBX: ffff88090e2e2340 RCX: 0000000000000005
RDX: ffff88090e2e2340 RSI: 0000000000000005 RDI: ffff88087c602a88
RBP: ffff881975b99bf0 R8: ffff8817ff75e400 R9: ffff8808b7aa4440
R10: 000000000000004e R11: ffff880cd203e029 R12: 0000000000000005
R13: ffffffffa0820020 R14: ecb7680000000000 R15: ffff880cd203e018
ORIG_RAX: ffffffffffffffff CS: 0010 SS: 0018
#8 [ffff881975b99bf8] dlm_do_local_bast at ffffffffa07fabbe [ocfs2_dlm]
#9 [ffff881975b99c58] dlm_proxy_ast_handler at ffffffffa07fbad1 [ocfs2_dlm]
#10 [ffff881975b99ce8] o2net_process_message at ffffffffa07a8bbb [ocfs2_nodemanager]
#11 [ffff881975b99d78] o2net_advance_rx at ffffffffa07a8e6b [ocfs2_nodemanager]
#12 [ffff881975b99df8] o2net_rx_until_empty at ffffffffa07a91ee [ocfs2_nodemanager]
#13 [ffff881975b99e58] process_one_work at ffffffff8108c2d9
#14 [ffff881975b99ea8] worker_thread at ffffffff8108cc1a
#15 [ffff881975b99ee8] kthread at ffffffff810911f7
#16 [ffff881975b99f48] kernel_thread_helper at ffffffff81511c4

 

Cause

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In this Document
Symptoms
Cause
Solution
References

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