From owner-freebsd-hackers Mon Sep 17 13:32: 9 2001 Delivered-To: freebsd-hackers@freebsd.org Received: from earth.backplane.com (earth-nat-cw.backplane.com [208.161.114.67]) by hub.freebsd.org (Postfix) with ESMTP id 1069937B408 for ; Mon, 17 Sep 2001 13:32:07 -0700 (PDT) Received: (from dillon@localhost) by earth.backplane.com (8.11.6/8.11.2) id f8HKW6M41638; Mon, 17 Sep 2001 13:32:06 -0700 (PDT) (envelope-from dillon) Date: Mon, 17 Sep 2001 13:32:06 -0700 (PDT) From: Matt Dillon Message-Id: <200109172032.f8HKW6M41638@earth.backplane.com> To: hackers@FreeBSD.org Subject: bug in sshd - signal during free() Sender: owner-freebsd-hackers@FreeBSD.ORG Precedence: bulk List-ID: List-Archive: (Web Archive) List-Help: (List Instructions) List-Subscribe: List-Unsubscribe: X-Loop: FreeBSD.ORG 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. -Matt (gdb) back #0 0x28231e34 in kill () from /usr/lib/libc.so.4 #1 0x2826dd8a in abort () from /usr/lib/libc.so.4 #2 0x2826c899 in isatty () from /usr/lib/libc.so.4 #3 0x2826c8cf in isatty () from /usr/lib/libc.so.4 #4 0x2826d907 in malloc () from /usr/lib/libc.so.4 #5 0x2826be58 in __smakebuf () from /usr/lib/libc.so.4 #6 0x2826bdec in __swsetup () from /usr/lib/libc.so.4 #7 0x282663ef in vfprintf () from /usr/lib/libc.so.4 #8 0x28266059 in fprintf () from /usr/lib/libc.so.4 #9 0x2824e0ed in vsyslog () from /usr/lib/libc.so.4 #10 0x2824e009 in syslog () from /usr/lib/libc.so.4 #11 0x804feb3 in do_log () #12 0x806ade3 in log () #13 0x804c742 in key_regeneration_alarm () #14 0xbfbfffac in ?? () #15 0x2826da35 in free () from /usr/lib/libc.so.4 #16 0x805f087 in xfree () #17 0x804d8be in main () #18 0x804c50d in _start () (gdb) To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-hackers" in the body of the message