Date: Mon, 17 Sep 2001 14:04:05 -0700 (PDT) From: Matt Dillon <dillon@earth.backplane.com> To: Alfred Perlstein <bright@mu.org> Cc: hackers@FreeBSD.org Subject: Re: bug in sshd - signal during free() Message-ID: <200109172104.f8HL45641959@earth.backplane.com> References: <200109172032.f8HKW6M41638@earth.backplane.com> <20010917160103.Z968@elvis.mu.org>
next in thread | previous in thread | raw e-mail | index | archive | help
:
:* Matt Dillon <dillon@earth.backplane.com> [010917 15:32] wrote:
:> sshd died on one of our machines today. The traceback seems to
:> indicate that a signal is interrupting a free(). I'm going to
:> play with the code a bit to see if there's an easy fix.
:>
:> This bug can't occur very often... the key regeneration signal
:> has to occur *just* as sshd is trying to free() something.
:
:The bug seems more likely to be caused by use of unsafe functions
:in a signal handler.
:
:I'm really suprised that the OpenSSH team didn't slap whomever decided
:to do so much processing within a signal handler silly.
It's funny... they had an XXX comment in there so obviously someone
was a little jittery about it. I think they just didn't realize that
a malloc() might occur inside the signal handler or they would have
fixed it long ago.
UNIX signals suck.
-Matt
To Unsubscribe: send mail to majordomo@FreeBSD.org
with "unsubscribe freebsd-hackers" in the body of the message
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?200109172104.f8HL45641959>