Periodic panics (again)

Paweł Tyll ptyll at
Sun May 18 20:00:32 UTC 2014

Hi guys,

I'm experiencing (somewhat random) panics every few days.

FreeBSD 10.0-STABLE #0 r265785

Fatal trap 12: page fault while in kernel mode
cpuid = 0; apic id = 00
fault virtual address   = 0x378
fault code              = supervisor read data, page not present
instruction pointer     = 0x20:0xffffffff808ef4f9
stack pointer           = 0x28:0xfffffe034a534960
frame pointer           = 0x28:0xfffffe034a5349f0
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         = 0 (dummynet)
trap number             = 12
panic: page fault
cpuid = 0
KDB: stack backtrace:
#0 0xffffffff8092ba30 at kdb_backtrace+0x60
#1 0xffffffff808f0f85 at panic+0x155
#2 0xffffffff80d01a5f at trap_fatal+0x38f
#3 0xffffffff80d01d78 at trap_pfault+0x308
#4 0xffffffff80d01430 at trap+0x4a0
#5 0xffffffff80ce7f32 at calltrap+0x8
#6 0xffffffff80a1ca77 at ip_input+0x4a7
#7 0xffffffff809bbae2 at netisr_dispatch_src+0x62
#8 0xffffffff80adf96c at dummynet_send+0x10c
#9 0xffffffff80adf584 at dummynet_task+0x2c4
#10 0xffffffff8093a095 at taskqueue_run_locked+0xe5
#11 0xffffffff8093ab28 at taskqueue_thread_loop+0xa8
#12 0xffffffff808c1b1a at fork_exit+0x9a
#13 0xffffffff80ce846e at fork_trampoline+0xe

(kgdb) #0  doadump (textdump=<value optimized out>) at pcpu.h:219
#1  0xffffffff808f0c02 in kern_reboot (howto=260)
    at /usr/src/sys/kern/kern_shutdown.c:452
#2  0xffffffff808f0fc4 in panic (fmt=<value optimized out>)
    at /usr/src/sys/kern/kern_shutdown.c:759
#3  0xffffffff80d01a5f in trap_fatal (frame=<value optimized out>,
    eva=<value optimized out>) at /usr/src/sys/amd64/amd64/trap.c:881
#4  0xffffffff80d01d78 in trap_pfault (frame=0xfffffe034a5348b0,
    usermode=<value optimized out>) at /usr/src/sys/amd64/amd64/trap.c:692
#5  0xffffffff80d01430 in trap (frame=0xfffffe034a5348b0)
    at /usr/src/sys/amd64/amd64/trap.c:456
#6  0xffffffff80ce7f32 in calltrap ()
    at /usr/src/sys/amd64/amd64/exception.S:232
#7  0xffffffff808ef4f9 in __rw_rlock (c=0xfffff80063753438, file=0x0, line=0)
    at /usr/src/sys/kern/kern_rwlock.c:420
#8  0xffffffff80a1ca77 in ip_input (m=0xfffff8010d7fc800)
    at /usr/src/sys/netinet/ip_input.c:593
#9  0xffffffff809bbae2 in netisr_dispatch_src (proto=<value optimized out>,
    source=<value optimized out>, m=0x0) at /usr/src/sys/net/netisr.c:972
#10 0xffffffff80adf96c in dummynet_send (m=<value optimized out>)
    at /usr/src/sys/netpfil/ipfw/ip_dn_io.c:665
#11 0xffffffff80adf584 in dummynet_task (context=<value optimized out>,
    pending=<value optimized out>) at /usr/src/sys/netpfil/ipfw/ip_dn_io.c:625
#12 0xffffffff8093a095 in taskqueue_run_locked (queue=0xfffff8005d7a5e00)
    at /usr/src/sys/kern/subr_taskqueue.c:342
#13 0xffffffff8093ab28 in taskqueue_thread_loop (arg=<value optimized out>)
    at /usr/src/sys/kern/subr_taskqueue.c:563
#14 0xffffffff808c1b1a in fork_exit (
    callout=0xffffffff8093aa80 <taskqueue_thread_loop>,
    arg=0xffffffff8151b758, frame=0xfffffe034a534c00)
    at /usr/src/sys/kern/kern_fork.c:995
#15 0xffffffff80ce846e in fork_trampoline ()
    at /usr/src/sys/amd64/amd64/exception.S:606
#16 0x0000000000000000 in ?? ()
Current language:  auto; currently minimal

Full   dump   is   available   (actually four of them at this time) if
more info is needed.

Any ideas?

Kind regards.

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