Date: Sun, 3 Aug 2003 09:33:02 +0930 From: Greg 'groggy' Lehey <grog@FreeBSD.org> To: Terry Lambert <tlambert2@mindspring.com> Cc: current@freebsd.org Subject: Re: Yet another crash in FreeBSD 5.1 Message-ID: <20030803000302.GE95375@wantadilla.lemis.com> In-Reply-To: <3F2B803C.21D38E0B@mindspring.com> References: <1079.192.168.0.3.1059811884.squirrel@webmail.aminor.no> <3F2B803C.21D38E0B@mindspring.com>
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--uCPdOCrL+PnN2Vxy Content-Type: text/plain; charset=us-ascii Content-Disposition: inline On Saturday, 2 August 2003 at 2:11:24 -0700, Terry Lambert wrote: > Eivind Olsen wrote: >> Can anyone suggest what I do next to find out about this crash? > >> Fatal trap 12: page fault while in kernel mode >> fault virtual address = 0x14 > > Dereference of NULL pointer; reference is for element at offset > 0x14 in some structure; this is the equivalent of 5 32 bit ints > or pointers into the structure. > >> db> trace >> g_dev_strategy(c2156024,c2153800,0,cfb528d0,c2099eca) at g_dev_strategy+0x29 >> launch_requests(c299bf00,0,10000,ffffffff,47) at launch_requests+0x448 >> vinumstart(c5ada2d0,0,c22ab000,cfb5294c,c02e5bc6) at vinumstart+0x2b2 > > gdb -k kernel.debug > (gdb) list *(g_dev_strategy+29) > [ ... ] > (gdb) list *(launch_requests+448) > [ ... ] > (gdb) list *(vinumstart+2b2) > [ ... ] > > Will give you the exact source lines involved, assuming you > built a debug kernel. > > You don't actually need a crash dump to debug a stack traceback. Great! So you know the answer? Please submit a patch. Seriously, this is nonsense. Yes, it's a null pointer dereference. What? Why? How do you fix it? Finding the first step doesn't solve the problem. Greg -- See complete headers for address and phone numbers --uCPdOCrL+PnN2Vxy Content-Type: application/pgp-signature Content-Disposition: inline -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.2.0 (FreeBSD) iD8DBQE/LFE2IubykFB6QiMRAo2uAJwIx6C51NQu5KmW4sM9KkOy8qaNNgCfeld3 fiLNKChc/ZSmHrDZ6mdWI6I= =jnio -----END PGP SIGNATURE----- --uCPdOCrL+PnN2Vxy--
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