Date: Tue, 10 Feb 2004 20:05:22 -0800 From: Kris Kennaway <kris@obsecurity.org> To: Thomas Moestl <t.moestl@tu-bs.de> Cc: Kris Kennaway <kris@obsecurity.org> Subject: Re: "panic: trap: fast data access mmu miss" on 5.2-C Message-ID: <20040211040522.GA46616@xor.obsecurity.org> In-Reply-To: <20040205143536.GA712@timesink.dyndns.org> References: <20040201105032.GA17856@xor.obsecurity.org> <20040201164950.GB713@timesink.dyndns.org> <20040205085409.GA12282@xor.obsecurity.org> <20040205143536.GA712@timesink.dyndns.org>
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--MGYHOYXEY6WxJCY8 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable On Thu, Feb 05, 2004 at 03:35:36PM +0100, Thomas Moestl wrote: > On Thu, 2004/02/05 at 00:54:09 -0800, Kris Kennaway wrote: > > On Sun, Feb 01, 2004 at 05:49:50PM +0100, Thomas Moestl wrote: > > > Looks like the back trace ran off the end of the stack; > > > db_stack_trace_cmd() only handles the usual starting points of kernel > > > stacks (traps from userland), but not freshly forked processes (or > > > kernel threads). The attached patch should fix that by initializing > > > the fr_pc and fr_fp fields of the first frame to 0 in cpu_fork(). >=20 > Did you get a witness backtrace ending in fork_trampoline() since? Looks like this is good to go. Kris --MGYHOYXEY6WxJCY8 Content-Type: application/pgp-signature Content-Disposition: inline -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.2.4 (FreeBSD) iD8DBQFAKaoCWry0BWjoQKURAio4AJ93eaxrml0QTeeYKNz8/Bvc4FswtwCg+F/A mQ7hDeifgaFa2HYG0/3E7ko= =ltxi -----END PGP SIGNATURE----- --MGYHOYXEY6WxJCY8--
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