Date: Fri, 17 Jun 2005 19:08:00 -0400 From: Kris Kennaway <kris@obsecurity.org> To: John Baldwin <jhb@FreeBSD.org> Cc: amd64@freebsd.org, freebsd-current@freebsd.org, current@freebsd.org, Kris Kennaway <kris@obsecurity.org> Subject: Re: Fatal trap 12 in exec_copyout_strings() Message-ID: <20050617230800.GA72019@xor.obsecurity.org> In-Reply-To: <200506171434.49008.jhb@FreeBSD.org> References: <20050510223636.GA49927@xor.obsecurity.org> <20050529175056.GA99318@xor.obsecurity.org> <200506171434.49008.jhb@FreeBSD.org>
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[-- Attachment #1 --] On Fri, Jun 17, 2005 at 02:34:47PM -0400, John Baldwin wrote: > On Sunday 29 May 2005 01:50 pm, Kris Kennaway wrote: > > On Tue, May 10, 2005 at 03:36:36PM -0700, Kris Kennaway wrote: > > > Got this on a dual amd64 with 8GB RAM running 6.0 from last week: > > > > > > Fatal trap 12: page fault while in kernel mode > > > cpuid = 1; apic id = 01 > > > fault virtual address = 0xffffffffa9cdc000 > > > fault code = supervisor read, page not present > > > instruction pointer = 0x8:0xffffffff8037759f > > > stack pointer = 0x10:0xffffffffba1637d0 > > > frame pointer = 0x10:0xffffffffba163820 > > > code segment = base 0x0, limit 0xfffff, type 0x1b > > > = DPL 0, pres 1, long 1, def32 0, gran 1 > > > processor eflags = interrupt enabled, resume, IOPL = 0 > > > current process = 52247 (sh) > > > [thread pid 52247 tid 100149 ] > > > Stopped at exec_copyout_strings+0x12f: > > > db> wh > > > Tracing pid 52247 tid 100149 td 0xffffff016e5724c0 > > > exec_copyout_strings() at exec_copyout_strings+0x12f > > > do_execve() at do_execve+0x39a > > > kern_execve() at kern_execve+0xab > > > execve() at execve+0x49 > > > syscall() at syscall+0x382 > > > Xfast_syscall() at Xfast_syscall+0xa8 > > > --- syscall (59, FreeBSD ELF64, execve), rip = 0x80090622c, rsp = > > > 0x7fffffffe058, rbp = 0xffffffff --- db> > > > > I've got this panic twice more since. > > Do you have a kernel.debug? Can you do 'list *exec_copyout_strings+0x12f'? I > think I've seen reports of the linux32_exec_copyout_strings() having a > similar fault as well on amd64. If (when) it happens again I'll do this (unfortunately I can't dump on this machine, though). Thanks for the response. Kris [-- Attachment #2 --] -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.1 (FreeBSD) iD8DBQFCs1fQWry0BWjoQKURAvZtAJ4uI7edNhqHxiLhSVNGmWW3R1/mQwCfcLYJ kfKV8J73pOcy7oIXm0SHd1M= =XMEj -----END PGP SIGNATURE-----
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