Date: Sun, 16 Mar 2003 09:55:41 -0600 From: Krzysztof Parzyszek <kristof@swissmail.org> To: Poul-Henning Kamp <phk@phk.freebsd.dk> Cc: Bryan Liesner <bleez@verizon.net>, Shizuka Kudo <shizukakudo_99@yahoo.com>, freebsd-current@FreeBSD.ORG Subject: Re: panic on boot (devfs_find) Message-ID: <20030316155541.GA60143@antares.student.iastate.edu> In-Reply-To: <4708.1047803355@critter.freebsd.dk> References: <20030316012828.Q460@gravy.kishka.net> <4708.1047803355@critter.freebsd.dk>
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On Sun, Mar 16, 2003 at 09:29:15AM +0100, Poul-Henning Kamp wrote:
>
> I don't think I'll stand a chance on this one until I can reproduce it
> on one of my machines :-(
I'm not sure if that helps, but on my machine it it enough to take
GENERIC kernconf file, add all GEOM_ options and comment out
INVARIANTS and WITNESSES. I don't thing this it the least amount
of changes, but it reliably causes trap 12:
Mounting root from ufs:/dev/ad1s1a
Fatal trap 12: page fault while in kernel mode
fault virtual address = 0x7
fault code = supervisor read, page not present
instruction pointer = 0x8:0xc02b0ae3
stack pointer = 0x10:0xd5279934
frame pointer = 0x10:0xd527994c
code segment = base 0x0, limit 0xfffff, type 0x1b
= DPL 0, pres 1, def32, gran 1
processor eflags = interrupt enabled, resumr, IOPL = 0
current process = 45 (init)
kernel: type 12 trap, code=0
Stopped at devfs_find+0x23: movzbl 0x7(%eax),%eax
db> trace
devfs_find(c3b15300,c058d4a0,2,c38cd3c0,2) at devfs_find+0x23
devfs_populate(c3bac200,0,c38cd3c0,0,0) at devfs_populate+0x1ea
devfs_lookupx(d5279b08,1,0,c38cd3c0,6) at defvs_lookupx+0x22e
devfs_lookup(d5279b08,c38cd3c0,0,c38cd3c0,c38cd3c0) at defvs_lookup+0x4b
lookup(d5279c08,c3c5f400,400,d5279c24,c38cd3c0) at lookup+0x302
namei(d5279c08,0,0,0,0) at namei+0x20b
revoke(c38cd3c0,d5279d10,4,c38cd3c0,1) at revoke+0x52
syscall(2f,2f,2f,bfbffdf8,0) at syscall+0x2aa
Xint0x80_syscall() at Xint0x80_syscall+0x1d
--- syscall (56, FreeBSD ELF32, revoke), eip = 0x8052c23, esp = 0xbfbffc6c, ebp = 0xbfbffc88 ---
This was all copied from the screen by hand, but I hope there are no mistakes.
I was unable to generate a crash dump, despite many attempts... :(
Krzysztof
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