[LU-1245] general protection fault in lprocfs_fops_read

• Type: Bug
• Resolution: Fixed
• Priority: Minor
• Fix Version/s: Lustre 2.3.0, Lustre 2.1.2
• Affects Version/s: Lustre 2.1.0, Lustre 2.1.2
• Labels: paj
• Environment: https://github.com/chaos/lustre/tree/2.1.0-llnl
• Severity: 3
• Assignee: Zhenyu Xu
• Reporter: Ned Bass (Inactive)

Description

Our slurm epilog runs a script that cats the files

/proc/fs/lustre/ldlm/namespaces/*/lock_count
/proc/fs/lustre/ldlm/namespaces/*/lock_unused
/proc/fs/lustre/ldlm/namespaces/*/resource_count

One such cat process on a Lustre 2.1 client hit a GPF with the backtrace below.

machine_kexec
crash_kexec
oops_end
die
do_general_protection
general_protection
[exception RIP:lprocfs_rd_ns_locks+88]
lprocfs_fops_read
proc_reg_read
vfs_read
sys_read
system_call_fastpath

We have a crash dump for analysis on our classified network, so please let us know if there's any data structures you want to see.

Issue Links

• Trackbacks: Changelog 2.1 Changes from version 2.1.1 to version 2.1.2 Server support for kernels: 2.6.18308.4.1.el5 (RHEL5) 2.6.32220.17.1.el6 (RHEL6) Client support for unpatched kernels: 2.6.18308.4.1.el5 (RHEL5) 2.6.32220.17.1....