Date: Mon, 18 Mar 2002 23:57:30 +0000 From: Ian Dowse <iedowse@maths.tcd.ie> To: Josef Karthauser <joe@tao.org.uk> Cc: W Alexander Hagen <aligzanduh@yahoo.com>, freebsd-net@freebsd.org, jedgar@freebsd.org, Eugene Grosbein <eugen@grosbein.pp.ru>, freebsd-stable@freebsd.org Subject: Re: Freebsd REL_ENG 4.3 p28 freezes every 30 minutes. Message-ID: <200203182357.aa63120@salmon.maths.tcd.ie> In-Reply-To: Your message of "Mon, 18 Mar 2002 23:04:52 GMT." <20020318230452.GC83798@genius.tao.org.uk>
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In message <20020318230452.GC83798@genius.tao.org.uk>, Josef Karthauser writes:
>The revision level of what? Every file has it's own revision level, and
>there isn't a global revision number for the whole system. How are you
>getting the p28 number?
He means RELENG_4_3 patch level 28, which is the most recent security
patch on that branch (approx 10 days ago).
There have been a few reports now (see also kern/35969) of crashes
that seem to correspond to the kernel zlib error-handling fix (it
is RELENG_4_3 patch 27). Maybe it has some problems? Actually, just
looking at the patch, I think it does...
The patch moves the position of one of the
ZFREE(z, s->sub.trees.blens);
lines to after
s->sub.decode.codes = c;
but s->sub is a union, and s->sub.trees.blens aliases s->sub.decode.codes
(on the i386 anyway), so the patch completely changes the behaviour.
Could someone seeing crashes since this "fix" try the following
patch?
Ian
Index: /usr/src/sys/net/zlib.c
===================================================================
RCS file: /dump/FreeBSD-CVS/src/sys/net/zlib.c,v
retrieving revision 1.11
diff -u -r1.11 zlib.c
--- /usr/src/sys/net/zlib.c 17 Feb 2002 17:35:18 -0000 1.11
+++ /usr/src/sys/net/zlib.c 18 Mar 2002 23:48:08 -0000
@@ -3951,11 +3951,11 @@
r = Z_MEM_ERROR;
LEAVE
}
+ ZFREE(z, s->sub.trees.blens);
s->sub.decode.codes = c;
s->sub.decode.tl = tl;
s->sub.decode.td = td;
}
- ZFREE(z, s->sub.trees.blens);
s->mode = CODES;
case CODES:
UPDATE
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