Date: Sat, 25 Jun 2005 19:32:17 +0200 From: Peter Holm <peter@holm.cc> To: Mike Silbersack <silby@silby.com> Cc: current@freebsd.org, Thierry Herbelot <thierry@herbelot.com> Subject: Re: Mbuf double-free guilty party detection patch Message-ID: <20050625173217.GA24306@peter.osted.lan> In-Reply-To: <1437.64.215.82.94.1119717536.squirrel@webmail2.pair.com> References: <20050624212729.C537@odysseus.silby.com> <20050625133052.GA23599@peter.osted.lan> <1437.64.215.82.94.1119717536.squirrel@webmail2.pair.com>
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On Sat, Jun 25, 2005 at 12:38:56PM -0400, Mike Silbersack wrote: > > Didn't have much luck with your patch: > > > > x.123b:This memory last freed by: 0 > > x.123b-panic: Memory modified after free 0xc25a7100(256) val=0 @ > > 0xc25a7100 > > -- > > x.123c:This memory last freed by: 0 > > x.123c-panic: Memory modified after free 0xc1f60e00(256) val=0 @ > > 0xc1f60e00 > > Interesting on those two... > > > x.123e:This memory last freed by: 0xc2fa6c00 > > x.123e-panic: Memory modified after free 0xc2fa6a00(256) val=c2fa6c00 @ > > 0xc2fa6a00 > > > > - Peter > > Now do a "x 0xc2fa6c00" in DDB to find out who was calling m_free. > (kgdb) x/40x 0xc2fa6a00 0xc2fa6a00: 0xc2fa6c00 0x00000000 0xc24b1ae0 0x00000520 0xc2fa6a10: 0x00008003 0xdead0001 0x00000000 0x000005a8 0xc2fa6a20: 0xdeadc0de 0x00000000 0xdeadc0de 0x00000000 0xc2fa6a30: 0x00000000 0x00000000 0x00000000 0x00000800 0xc2fa6a40: 0xc24ad15c 0x00000003 0xdeadc0de 0xdeadc0de 0xc2fa6a50: 0xdeadc0de 0xdeadc0de 0xdeadc0de 0xdeadc0de 0xc2fa6a60: 0xdeadc0de 0xdeadc0de 0xdeadc0de 0xdeadc0de 0xc2fa6a70: 0xdeadc0de 0xdeadc0de 0xdeadc0de 0xdeadc0de 0xc2fa6a80: 0xdeadc0de 0xdeadc0de 0xdeadc0de 0xdeadc0de 0xc2fa6a90: 0xdeadc0de 0xdeadc0de 0xdeadc0de 0xdeadc0de > Mike "Silby" Silbersack -- Peter Holm
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