[LU-1094] general protection fault in _debug_req()

• Type: Bug
• Resolution: Duplicate
• Priority: Critical
• Affects Version/s: Lustre 2.1.0
• Labels: paj
• Environment: https://github.com/chaos/lustre/commits/2.1.0-llnl; RHEL 6.2
• Severity: 3
• Assignee: Oleg Drokin
• Reporter: Ned Bass (Inactive)

Description

We had five occurrences of this crash on OSS nodes in our classified Lustre 2.1 cluster. Timeframe coincided with LU-1085. Like the other bugs in that window, this crash was preceded by hundreds of messages like:

LustreError: 14210:0:(genops.c:1270:class_disconnect_stale_exports()) ls5-OST0349: disconnect stale client [UUID]@<unknown>

general protection fault: 0000 1 SMP
Pid: 13890, comm: ll_ost_34

machine_kexec
crash_kexec
oops_end
die
do_general_protection
general_protection
[exception RIP: strnlen+9]
string
vsnprintf
libcfs_debug_vmsg2
_debug_req
target_send_reply_msg
target_send_reply
ost_handle
ptlrpc_main
kernel_thread