[LU-4273] Kernel panic in ll_fiemap code path

• Status: Resolved
• Project: Lustre
• Affects Version/s: Lustre 1.8.7
• Type: Bug
• Priority: Minor
• Reporter: Rajeshwaran Ganesan
• Assignee: Bob Glossman (Inactive)
• Resolution: Duplicate
• Severity: 3

Description

On a Lustre 1.8.7 client at NTNU (Norwegian University of Science and Technology), a problem occured when attempting to build the VISIT visualization software (https://wci.llnl.gov/codes/visit/).

Backtrace:
================================================================
crash> bt
^[[?1h[=^[[53;1H[[KPID: 2743 TASK: ffff880445c48580 CPU: 2 COMMAND:
"cpack"
#0 [ffff88043f6b58b0] machine_kexec at ffffffff81020ac2
#1 [ffff88043f6b5900] crash_kexec at ffffffff810887e0
#2 [ffff88043f6b59d0] oops_end at ffffffff8139f600
#3[ffff88043f6b59f0] __bad_area_nosemaphore at ffffffff8102ed15
#4 [ffff88043f6b5ab0] page_fault at ffffffff8139e87f
[exception RIP: lov_get_info+3653]
RIP: ffffffffa07aaa15 RSP: ffff88043f6b5b68 RFLAGS: 00010217
RAX: 0000000000000000 RBX: ffffffffffffffff RCX: ffff88043f6b5ce8
RDX: 0000000000000009 RSI: 000007ffffffffff RDI: ffff880472de5b40
RBP: 0000000000000000 R8: ffff88043f6b5c70 R9: 0000000000000000
R10: 0000000000000001 R11: 0000000000000048 R12: ffff880413ba9000
R13: ffff880472de5b40 R14: 0000000000000000 R15: ffffc9001d85b000
ORIG_RAX: ffffffffffffffff CS: 0010 SS: 0018
#5 [ffff88043f6b5b60] lov_get_info at ffffffffa07aa831 [lov]
#6 [ffff88043f6b5cb0] ll_do_fiemap at ffffffffa08052c7 [lustre]
#7 [ffff88043f6b5e20] ll_fiemap at ffffffffa0805848 [lustre]
#8 [ffff88043f6b5e90] ioctl_fiemap at ffffffff8110edbb
#9 [ffff88043f6b5f10] do_vfs_ioctl at ffffffff8110f0e3
#10 [ffff88043f6b5f40] sys_ioctl at ffffffff8110f4

The client is running SLES11 SP1.

Comments

[Peter Jones]

Bob

What is your assessment of this error?

Thanks

Peter

[Bob Glossman (Inactive)]

seems like it might be similar or even a dup of LU-1923

[Kit Westneat (Inactive)]

Hi Bob,

We'll apply the patch from that ticket and let you know how it goes.

Thanks.