Red Hat Bugzilla – Bug 14419
Signal 11 in wu-ftpd 2.5.0 through 2.6.1
Last modified: 2008-05-01 11:37:56 EDT
Since upgrading my RedHat 5.1 wu-ftpd to version 2.5.0 I occasionally
received through syslog a message like this:
Apr 19 12:52:25 alpha ftpd: exiting on signal 11
subsequent upgrades to wu-ftpd 2.6.0 did not resolve my problems.
I always used RedHat precompiled versions (which also "featured" the long
known ftpwho error message on RH5.x, already featured in Bugzilla but never
Now I have downloaded and rebuilt 2.6.1-1.src.rpm and the message is:
Jul 21 19:59:14 alpha ftpd: exiting on signal 11: Segmentation fault
the ftpwho error is gone now (maybe autoconf'd build process figured out
the right ps syntax) but the sigsegv seems more frequent too. I'm running a
low traffic web/ftp site and the access rate is actually slowing down much
now (summer time): so the sigsegv rate is raising!
I'm running a pure RH 5.1 system with all the upgrades (now released
officially only for 5.2...) and kernel 2.0.38 with Solar Designer security
Wu-ftpd runs from inetd with the line:
ftp stream tcp nowait root /usr/sbin/tcpd in.ftpd -l -a
and a somewhat tweaked ftpd configuration (but no virtual hosts).
Judging from the access logs, real and guest users seems to have been
unaffected by the problem and the anonymous ones who get caught by sigsegv
are in vast majority using IE4 (but some GetRight report too). There seem
to be no other pattern.
Hope you can catch the bug (or help those kind souls finishing up the
latest proftpd release... ;> )
Can't reproduce it using Linux and *BSD clients (don't have anything else).
Does the number of segfaults reduce if you recompile using the old ("./build
This is not a problem in Red Hat Linux 6.2
Yeah! It really bug of wu-ftpd..
reproduced on RedHat 6.2 witch wu-ftpd-2.6.1-6 package.
other technical info sent to: firstname.lastname@example.org
wait for patch :)
Close this to 21900. Patch is in 21900.
*** This bug has been marked as a duplicate of 21900 ***