The root cause is poor code in a very old version.
The simple fix is to run a newer version, I'm sure there are RPMs around
for newer ones that don't have that problem.
I think this might be the bug, fixed around 4.2.0. This is from the
RELNOTES file distributed with the source.
! Two packets were found that cause a server to halt. The code
has been updated to properly process or reject the packets as
appropriate. Thanks to David Zych at University of Illinois
for reporting this issue. [ISC-Bugs #24960]
One CVE number for each class of packet.
CVE-2011-2748
CVE-2011-2749
But if you're going to patch the code and recompile, just go to the newer
version.
regards,
-glenn
On Wed, October 5, 2016 7:28 am, Norman Elton wrote:
> We are running RHEL6's version of ISC dhcpd (based on 4.1.1-p1). Every
> few months, one of our servers mysteriously segfaults:
>
> dhcpd[30744]: segfault at 7f3ff02712c8 ip 00007f3ff02712c8 sp
> 00007ffe16d0eb58 error 15 in libc-2.12.so[7f3ff0271000+2000]
>
> What is the recommended way to begin finding a root cause?
>
> Thanks!
>
> Norman Elton
> College of William & Mary
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>
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>
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