Red Hat Bugzilla – Bug 117171
kernel 2.6.3 (and 2.6.2) kernel panik with ipsec (interrupt not syncing)
Last modified: 2007-11-30 17:10:37 EST
Description of problem:
Heavy traffic through ipsec tunnel (100 or more kb/sec) will cause
kernel panic after about 5 to 10 seconds.
Version-Release number of selected component (if applicable):
so far I have tested almost all fedora development kernels from
version 2.6.3-1.90 up to version 2.6.3-1.116
Happens every time. Either heavy traffic through the tunnel or a
combination of some traffic through the tunnel and heavy traffic to
I have tested this now on two different machines ( one AMD K6-2 and
one Intel PIII on Intel motherboard) with the same results.
I have also used both, the freeswan userland tools and the racoon
tools to setup the tunnel, in both cases using the kernel's built in
The kernel debug output is long and scrolls off my screen. I will
obtain a null modem cable and try to capture it to an external console.
Here is what I managed to capture from what is visible on the console:
EIP is at des_small_fips_decrypt
Kernel panik: Fatal exception in interrupt
In interrupt handler - not syncing
Is bug 116494 a duplicate of this?
It probably is, sorry about that.
In addition, this bug appears to be fixed in kernel-2.6.3-2.1.238. I
haven't been able to reproduce it.