Date: Mon, 17 Sep 2001 13:32:06 -0700 (PDT) From: Matt Dillon <dillon@earth.backplane.com> To: hackers@FreeBSD.org Subject: bug in sshd - signal during free() Message-ID: <200109172032.f8HKW6M41638@earth.backplane.com>
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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)
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