Description of problem:
During the execution of the frysk testsuite, a kernel oops was triggered,
causing the entire box to hang. I chose severity high because this problem
causes a total crash of the box, kernel panic without syncing.
Version-Release number of selected component (if applicable):
Reproducing this problem has been difficult at best. It occurs every now
and then, with no real indication of frequency due to it not having been
triggered more than once every 2-3 weeks.
Steps to Reproduce:
1. Run frysk testsuite (using make -k check)
2. If problem does not occur, repeat step 1 (sometimes MANY times)
IP is at 0x0
eax: c475efa0 ebx: 00000000 ecx: f7e5eb80 edx: c475efa0
esi: c2402380 edi: 00000002 ebp: 00000000 esp: c077afc8
ds: 007b es: 007b ss: 0068
Process funit-child (pid: 30778, ti=c077a000 task=f7e06630 task.ti=e9e24000)
Stack: c04316e7 c24023fc 00000000 00000008 c043176b c04276d4 00000001
c042762c e9e24f8c e9e24000 00000046 bfa29b00 c04067d7
Code: Bad EIP value.
EIP: [<00000000>] 0x0 SS:ESP 0068:c077afc8
<0>Kernel panic - not syncing: Fatal exception in interrupt
Successful completion of the frysk testsuite, without kernel panic.
This problem has been extremely difficult to reproduce (so far). It is not
at all certain that Frysk has anything to do with the problem, nor is it
certain that anything used by Frysk (e.g. utrace) can be blamed. It is
however a strict fact that this problem has only occurred so far during or
shortly after running the Frysk test suite.
The panic output is incomplete and doesn't include the kernel version.
The panic output in this bug report is all that could be obtained from the
uname -a output:
Linux ca-tools2 2.6.20-1.2948.fc6 #1 SMP Fri Apr 27 18:53:15 EDT 2007 i686 i686
Kernel 2962 contains a utrace update.
That's a failure mode of old utrace bugs fixed a while ago. Reopen if it reoccurs.