Re: Fatal trap 12 panic in recent -current

On Tue, Jan 06, 2004 at 10:21:09AM -0500, John Baldwin wrote:
> 
> Wrong frame, gdb loses a frame during a page fault trap.  Try doing
> 'l *0xc054-- 

Ah, I didn't realise. That certainly explains why it didn't seem to make any
sense. Here is the actual panic: (Probably, I might have updated in the
meantime...) I'd be happy to do more investigating if anyone is interested.

panic messages:
---
Fatal trap 12: page fault while in kernel mode
fault virtual address   = 0x10
fault code              = supervisor read, page not present
instruction pointer     = 0x8:0xc0543343
stack pointer           = 0x10:0xc9f89c80
frame pointer           = 0x10:0xc9f89cac
code segment            = base 0x0, limit 0xfffff, type 0x1b
                        = DPL 0, pres 1, def32 1, gran 1
processor eflags        = interrupt enabled, resume, IOPL = 0
current process         = 27 (swi8: tty:sio clock)
trap number             = 12
panic: page fault

syncing disks, buffers remaining... 1295 1295 1295 1295 1295 1295 1295 1295
1295
 1295 1295 1295 1295 1295 1295 1295 1295 1295 1295 1295 
giving up on 816 buffers
Uptime: 12h47m56s
Dumping 127 MB
 16 32 48 64 80 96 112
---
Reading symbols from
/usr/obj/usr/src/sys/URIEL/modules/usr/src/sys/modules/linu
x/linux.ko.debug...done.
Loaded symbols for
/usr/obj/usr/src/sys/URIEL/modules/usr/src/sys/modules/linux/
linux.ko.debug
Reading symbols from /boot/kernel/nvidia.ko...done.
Loaded symbols for /boot/kernel/nvidia.ko
Reading symbols from /boot/kernel/ng_ubt.ko...done.
Loaded symbols for /boot/kernel/ng_ubt.ko
Reading symbols from /boot/kernel/netgraph.ko...done.
Loaded symbols for /boot/kernel/netgraph.ko
Reading symbols from
/usr/obj/usr/src/sys/URIEL/modules/usr/src/sys/modules/ntfs
/ntfs.ko.debug...done.
Loaded symbols for
/usr/obj/usr/src/sys/URIEL/modules/usr/src/sys/modules/ntfs/n
tfs.ko.debug
Reading symbols from
/usr/obj/usr/src/sys/URIEL/modules/usr/src/sys/modules/linp
rocfs/linprocfs.ko.debug...done.
Loaded symbols for
/usr/obj/usr/src/sys/URIEL/modules/usr/src/sys/modules/linpro
cfs/linprocfs.ko.debug
Reading symbols from
/usr/obj/usr/src/sys/URIEL/modules/usr/src/sys/modules/ipfw
/ipfw.ko.debug...done.
Loaded symbols for
/usr/obj/usr/src/sys/URIEL/modules/usr/src/sys/modules/ipfw/i
pfw.ko.debug
Reading symbols from /boot/kernel/logo_saver.ko...done.
Loaded symbols for /boot/kernel/logo_saver.ko
#0  doadump () at /usr/src/sys/kern/kern_shutdown.c:240
240             dumping++;
(kgdb) bt
#0  doadump () at /usr/src/sys/kern/kern_shutdown.c:240
#1  0xc05a1909 in boot (howto=256) at /usr/src/sys/kern/kern_shutdown.c:372
#2  0xc05a1ce8 in panic () at /usr/src/sys/kern/kern_shutdown.c:550
#3  0xc072efb6 in trap_fatal (frame=0xc9f89c40, eva=0)
    at /usr/src/sys/i386/i386/trap.c:821
#4  0xc072ec52 in trap_pfault (frame=0xc9f89c40, usermode=0, eva=16)
    at /usr/src/sys/i386/i386/trap.c:735
#5  0xc072e7ad in trap (frame=
      {tf_fs = -1067778024, tf_es = -1065615344, tf_ds = 16, tf_edi =
-101627187
2, tf_esi = -1015529472, tf_ebp = -906453844, tf_isp = -906453908, tf_ebx = 7,
t
f_edx = 4, tf_ecx = 0, tf_eax = 0, tf_trapno = 12, tf_err = 0, tf_eip =
-1068223
677, tf_cs = 8, tf_eflags = 66118, tf_esp = -1015529472, tf_ss = 608})
    at /usr/src/sys/i386/i386/trap.c:420
#6  0xc071fb48 in calltrap () at {standard input}:94
#7  0xc05b3d5e in softclock (dummy=0x0) at
/usr/src/sys/kern/kern_timeout.c:226
#8  0xc058b938 in ithread_loop (arg=0xc12c9580)
    at /usr/src/sys/kern/kern_intr.c:544
#9  0xc058a5b0 in fork_exit (callout=0xc058b760 <ithread_loop>, arg=0x0, 
    frame=0x0) at /usr/src/sys/kern/kern_fork.c:793
(kgdb) l *0xc0543343
0xc0543343 is in umass_cam_rescan (/usr/src/sys/cam/cam_sim.h:107).
102     };
103
104     static __inline u_int32_t
105     cam_sim_path(struct cam_sim *sim)
106     {
107             return (sim->path_id);
108     }
109
110     static __inline const char *
111     cam_sim_name(struct cam_sim *sim)
(kgdb) 
Michael McGoldrick: michael_at_mcgoldrick.org