6.4-PRELEASE sporadically panicking with fatal trap 12
barbara
barbara.xxx1975 at libero.it
Sat Oct 11 19:24:23 PDT 2008
> > barbara wrote:
> > > Hello,
> > > I'm running 6.4-PRELEASE, last built on 2008-10-05 with /usr/src updated on the same day.
> > > I had a panic that looks to me very similiar to the one described here (hence the subject):
> > > http://lists.freebsd.org/pipermail/freebsd-stable/2008-September/045405.html
> > >
> > > What caught my curiosity is the message:
> > >
> > > Unread portion of the kernel message buffer:
> > >
> > > acd0: WARNING - TEST_UNIT_READY read data overrun 18>0
> > >
> > > kernel trap 12 with interrupts disabled
> > >
> > > I don't have atapicam built in the kernel and it wasn't loaded, and I'm pretty sure no media was inserted in my dvdrw unit since the last boot.
> > > The other report has a similar message too (acd1: WARNING - READ_TOC read data overrun 18>12)
> > >
> > >
> > > Here's the backtrace:
> > >
> > Interesting. I ran 6.3 for a bit before I changed over to 7.0. Neither
> > 6.3 or 7.0 exhibited this problem.
> >
> > I'm at 7.1 prerelease #4 now, and I'm using Fluxbox instead of Gnome.
> > The system has been up six days with no problems. I'll probably try
> > using Gnome again after 7.1 release is out. There's also a patch to ATA
> > that I might try. Or possibly I'll just wait for 7.1. :-)
> >
>
> Obviously I was confused when I wrote about atapicam, in fact the message is about acd0.
> Anyway I'm sure that no media was inserted during the whole uptime.
> I'm running both 6 and 7 stable and I've never seen this before too.
>
> Few minutes ago, while cron was running, the system froze for a couple of minutes and the these lines was added to /var/log/messages:
>
> acd0: WARNING - PREVENT_ALLOW taskqueue timeout - completing request directly
> acd0: WARNING - PREVENT_ALLOW freeing taskqueue zombie request
>
> and again, no media was inserted.
> The only change I did in the last days was enabling powerd, I have no idea if this could be related.
>
Here's another one, but it looks different.
Having no clue, I've restored the not enabled state of powerd for the moment.
# kgdb kernel.debug /var/crash/vmcore.3
GNU gdb 6.1.1 [FreeBSD]
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This GDB was configured as "i386-marcel-freebsd"...
Unread portion of the kernel message buffer:
kernel trap 12 with interrupts disabled
Fatal trap 12: page fault while in kernel mode
cpuid = 0; apic id = 00
fault virtual address = 0xca0a9228
fault code = supervisor read, page not present
instruction pointer = 0x20:0xc055d136
stack pointer = 0x28:0xe58f8c68
frame pointer = 0x28:0xe58f8ca8
code segment = base 0x0, limit 0xfffff, type 0x1b
= DPL 0, pres 1, def32 1, gran 1
processor eflags = resume, IOPL = 0
current process = 12 (swi4: clock sio)
trap number = 12
panic: page fault
cpuid = 0
Uptime: 5h19m51s
Physical memory: 2031 MB
Dumping 282 MB: 267 (CTRL-C to abort) 251 235 219 203 187 (CTRL-C to abort) 171 155 139 123 107 91 75 59 43 27 11 (CTRL-C to abort)
Reading symbols from /boot/kernel/linux.ko...done.
Loaded symbols for /boot/kernel/linux.ko
Reading symbols from /boot/modules/nvidia.ko...done.
Loaded symbols for /boot/modules/nvidia.ko
Reading symbols from /boot/kernel/acpi.ko...done.
Loaded symbols for /boot/kernel/acpi.ko
Reading symbols from /boot/kernel/linprocfs.ko...done.
Loaded symbols for /boot/kernel/linprocfs.ko
Reading symbols from /boot/kernel/logo_saver.ko...done.
Loaded symbols for /boot/kernel/logo_saver.ko
#0 doadump () at pcpu.h:165
165 __asm __volatile("movl %%fs:0,%0" : "=r" (td));
(kgdb) bt full
#0 doadump () at pcpu.h:165
No locals.
#1 0xc054d419 in boot (howto=260) at /usr/src/sys/kern/kern_shutdown.c:410
first_buf_printf = 1
#2 0xc054d7e6 in panic (fmt=0xc0736da9 "%s") at /usr/src/sys/kern/kern_shutdown.c:566
td = (struct thread *) 0xc6bea900
bootopt = 260
newpanic = 0
ap = 0xc6bea900 "`\230ŸÆ\200ÝŸÆ"
buf = "page fault", '\0' <repeats 245 times>
#3 0xc071822c in trap_fatal (frame=0xe58f8c28, eva=0) at /usr/src/sys/i386/i386/trap.c:838
code = 40
ss = 40
esp = 0
type = 12
softseg = {ssd_base = 0, ssd_limit = 1048575, ssd_type = 27, ssd_dpl = 0, ssd_p = 1, ssd_xx = 0, ssd_xx1 = 0,
ssd_def32 = 1, ssd_gran = 1}
msg = 0x0
#4 0xc07178e4 in trap (frame=
{tf_fs = 8, tf_es = 40, tf_ds = 40, tf_edi = -960218240, tf_esi = 4, tf_ebp = -443577176, tf_isp = -443577260, tf_ebx = 0, tf_edx = -624430808, tf_ecx = -905276896, tf_eax = 19190235, tf_trapno = 12, tf_err = 0, tf_eip = -1068117706, tf_cs = 32, tf_eflags = 65538, tf_esp = 2, tf_ss = -1068092317}) at /usr/src/sys/i386/i386/trap.c:270
td = (struct thread *) 0xc6bea900
p = (struct proc *) 0xc6be9860
sticks = 3851390008
type = 12
i = 0
ucode = 0
code = 0
eva = 3389690408
#5 0xc06ffaaa in calltrap () at /usr/src/sys/i386/i386/exception.s:139
No locals.
#6 0xc055d136 in softclock (dummy=0x0) at /usr/src/sys/kern/kern_timeout.c:203
c = (struct callout *) 0xca0a9220
bucket = (struct callout_tailq *) 0xdac7f128
curticks = 19190235
steps = 0
depth = 1
mpcalls = 0
mtxcalls = 0
gcalls = 0
#7 0xc052fbcb in ithread_execute_handlers (p=0xc6be9860, ie=0xc6c43b80) at /usr/src/sys/kern/kern_intr.c:682
ih = (struct intr_handler *) 0xc6c40dc0
ihn = (struct intr_handler *) 0xc6dc6400
#8 0xc052fd27 in ithread_loop (arg=0xc6bc68b0) at /usr/src/sys/kern/kern_intr.c:766
intr_event = (struct intr_thread *) 0xc6bc68b0
ie = (struct intr_event *) 0xc6c43b80
td = (struct thread *) 0xc6bea900
p = (struct proc *) 0xc6be9860
#9 0xc052e4b0 in fork_exit (callout=0xc052fcc0 <ithread_loop>, arg=0x124d1db, frame=0x124d1db)
at /usr/src/sys/kern/kern_fork.c:788
p = (struct proc *) 0xc6be9860
td = (struct thread *) 0xdac7f128
#10 0xc06ffb0c in fork_trampoline () at /usr/src/sys/i386/i386/exception.s:208
No locals.
(kgdb) up 6
#6 0xc055d136 in softclock (dummy=0x0) at /usr/src/sys/kern/kern_timeout.c:203
203 if (c->c_time != curticks) {
(kgdb)
(kgdb) list
198 curticks = softticks;
199 bucket = &callwheel[curticks & callwheelmask];
200 c = TAILQ_FIRST(bucket);
201 while (c) {
202 depth++;
203 if (c->c_time != curticks) {
204 c = TAILQ_NEXT(c, c_links.tqe);
205 ++steps;
206 if (steps >= MAX_SOFTCLOCK_STEPS) {
207 nextsoftcheck = c;
(kgdb)
(kgdb) thread apply all bt
Thread 192 (Thread 100131):
#0 sched_switch (td=0xc6dd3900, newtd=0xc6dd3a80, flags=1) at /usr/src/sys/kern/sched_4bsd.c:959
#1 0xc0555eef in mi_switch (flags=1, newtd=0x0) at /usr/src/sys/kern/kern_synch.c:420
#2 0xc0573ff9 in sleepq_switch (wchan=0x0) at /usr/src/sys/kern/subr_sleepqueue.c:464
#3 0xc05741a1 in sleepq_wait_sig (wchan=0xc6dc5010) at /usr/src/sys/kern/subr_sleepqueue.c:560
#4 0xc055592e in msleep (ident=0xc6dc5010, mtx=0x0, priority=345, wmesg=0x0, timo=0) at /usr/src/sys/kern/kern_synch.c:209
#5 0xc058aeb9 in ttysleep (tp=0xc6dc5000, chan=0x0, pri=0, wmesg=0x0, timo=0) at /usr/src/sys/kern/tty.c:2786
#6 0xc0589348 in ttread (tp=0xc6dc5000, uio=0xe7444cb0, flag=0) at /usr/src/sys/kern/tty.c:1888
#7 0xc058e55e in ptsread (dev=0x0, uio=0x0, flag=0) at linedisc.h:100
#8 0xc05155ef in giant_read (dev=0xc7e05600, uio=0x0, ioflag=0) at /usr/src/sys/kern/kern_conf.c:346
#9 0xc04ea669 in devfs_read_f (fp=0xc73b1048, uio=0xe7444cb0, cred=0xc76d0500, flags=0, td=0xc6dd3900)
at /usr/src/sys/fs/devfs/devfs_vnops.c:872
#10 0xc0578f0c in dofileread (td=0xc6dd3900, fd=0, fp=0xc73b1048, auio=0xe7444cb0, offset=Unhandled dwarf expression opcode 0x93
) at file.h:241
#11 0xc0578d20 in kern_readv (td=0xc6dd3900, fd=3, auio=0x0) at /usr/src/sys/kern/sys_generic.c:192
#12 0xc0578bdf in read (td=0x0, uap=0x0) at /usr/src/sys/kern/sys_generic.c:116
#13 0xc0718633 in syscall (frame=
{tf_fs = 59, tf_es = 59, tf_ds = 59, tf_edi = 134596408, tf_esi = -1077941969, tf_ebp = -1077941992, tf_isp = -414954140, tf_ebx = 126, tf_edx = 0, tf_ecx = 0, tf_eax = 3, tf_trapno = 22, tf_err = 2, tf_eip = 672829719, tf_cs = 51, tf_eflags = 646, tf_esp = -1077942036, tf_ss = 59}) at /usr/src/sys/i386/i386/trap.c:984
#14 0xc06ffaff in Xint0x80_syscall () at /usr/src/sys/i386/i386/exception.s:200
#15 0x00000033 in ?? ()
Previous frame inner to this frame (corrupt stack?)
165 __asm __volatile("movl %%fs:0,%0" : "=r" (td));
(kgdb) quit
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