Red Hat Bugzilla – Bug 467669
kernel panic related to autofs4_catatonic_mode when stopping autofs
Last modified: 2010-10-23 01:17:42 EDT
Description of problem:
kernel panic on RHEL4 when restarting autofs5
Version-Release number of selected component (if applicable):
Steps to Reproduce:
Using RHEL4 WS with the latest kernel (kernel-smp-2.6.9-78.0.5.EL) and autofs (autofs5-5.0.1-0.rc2.88) rpms, I can reliably crash (read "kernel panic") the O
1) open a couple of terminals (I logged on to tty1 and tty2)
2) in one terminal run "while :; do ls -lR /autofs/point/mount/* ; done"
3) in the other run "while :; do service autofs5 restart; done"
While this is a contrived scenario we noticed the panic on a couple of cluster nodes (run RHEL 4u7 WS) when they didn't pick up some new autofs map entries.
Service autofs5 reload didn't help so I did a service autofs5 restart and panics soon followed.
kernel panic with following backtrace:
PID: 23840 TASK: 101205e1030 CPU: 0 COMMAND: "automount5"
#0 [1011a693d20] start_disk_dump at ffffffffa01b1377
#1 [1011a693d50] try_crashdump at ffffffff8014cda9
#2 [1011a693d60] do_page_fault at ffffffff80124ae8
#3 [1011a693e40] error_exit at ffffffff80110e1d
[exception RIP: fput]
RIP: ffffffff8017ca06 RSP: 000001011a693ef0 RFLAGS: 00010246
RAX: 0000000000000002 RBX: 0000000000009362 RCX: 0000000000000000
RDX: 0000000000009362 RSI: 00000101198b8bc0 RDI: 0000000000000000
RBP: 0000000000000000 R8: 0000000000000000 R9: 0000000000000000
R10: 0000000000000000 R11: 0000000000009362 R12: 00000101199218c0
R13: 00000101198b8bc0 R14: 0000010119837270 R15: 0000000000000003
ORIG_RAX: ffffffffffffffff CS: 0010 SS: 0018
#4 [1011a693ef0] autofs4_catatonic_mode at ffffffffa0a45df2
#5 [1011a693f10] autofs4_root_ioctl at ffffffffa0a45b74
#6 [1011a693f40] sys_ioctl at ffffffff8018dc6d
#7 [1011a693f80] system_call at ffffffff801102f6
RIP: 0000002a95946f59 RSP: 0000000040621a98 RFLAGS: 00000246
RAX: 0000000000000010 RBX: ffffffff801102f6 RCX: 0000002a95677486
RDX: 0000000000000000 RSI: 0000000000009362 RDI: 0000000000000003
RBP: 000000552abfc930 R8: 0000000000000000 R9: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 000000552abfbe10
R13: 000000552abfbe10 R14: 0000000000000000 R15: 000000552ac17390
ORIG_RAX: 0000000000000010 CS: 0033 SS: 002b
No kernel panic
This bug is marked as dependent on bug 460083, which is the
kernel component of another issue. The patches included for
bug 460083 happen to also resolve several other issues that
are indirectly related to 460083 and this looks like one
such issue. When we see an issue like this I recommend we
create a separate bug to document these additional issues.
Of course we still need to verify the issue is resolved by
the patch series of 460083. The patch series was committed
to RHEL-4 kernel 2.6.9-78.15 and we need to make that kernel
available for testing. If it is considered to early to make
that revision available I can make a scratch build we could
use for this purpose.
The issue of a panic due to an access violation in kernel
module function autofs4_catatonic_mode() is addressed in
the patch submission for bug 460083. Since they have been
committed to the RHEL-4.8 kernel I'm setting this bug to
Any updates here? Has this issue been resolved in the RHEL 4.8 Beta? later kernel?
(In reply to comment #11)
> Any updates here? Has this issue been resolved in the RHEL 4.8 Beta? later
Nothing new since comment #7.
tested by QA, customer or partner and if so, whether or not it has been VERIFIED. Just trying to get any stale (VERIFIED) bugs to their proper state.
An advisory has been issued which should help the problem
described in this bug report. This report is therefore being
closed with a resolution of ERRATA. For more information
on therefore solution and/or where to find the updated files,
please follow the link below. You may reopen this bug report
if the solution does not work for you.