[Bug 191882] Multiple panics when ctld is running

bugzilla-noreply at freebsd.org bugzilla-noreply at freebsd.org
Tue Jul 15 18:11:26 UTC 2014


https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=191882

--- Comment #2 from Steven Peterson <scp at mainstream.net> ---
Additional Sample of Page Fault Panic:
plfs.pl.mainstream.net dumped core - see /var/crash/vmcore.2

Tue Jul 15 14:00:31 EDT 2014

FreeBSD plfs.pl.mainstream.net 10.0-RELEASE-p6 FreeBSD 10.0-RELEASE-p6 #0
r268165: Tue Jul 15 13:15:23 EDT 2014    
root at plfs.pl.mainstream.net:/usr/obj/usr/src/sys/PLFS  amd64

panic: page fault

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Unread portion of the kernel message buffer:


Fatal trap 12: page fault while in kernel mode
cpuid = 2; apic id = 02
fault virtual address   = 0x378
fault code              = supervisor read data, page not present
instruction pointer     = 0x20:0xffffffff8089c531
stack pointer           = 0x28:0xfffffe0838fbb7e0
frame pointer           = 0x28:0xfffffe0838fbb860
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         = 12 (swi4: clock)
trap number             = 12
panic: page fault
cpuid = 2
KDB: stack backtrace:
#0 0xffffffff808e7ce0 at kdb_backtrace+0x60
#1 0xffffffff808af7c5 at panic+0x155
#2 0xffffffff80c8de32 at trap_fatal+0x3a2
#3 0xffffffff80c8e109 at trap_pfault+0x2c9
#4 0xffffffff80c8d896 at trap+0x5e6
#5 0xffffffff80c74b32 at calltrap+0x8
#6 0xffffffff8089c36d at __mtx_lock_flags+0x5d
#7 0xffffffff81c49aab at icl_pdu_queue+0x2b
#8 0xffffffff81c2b81a at cfiscsi_pdu_queue+0x9a
#9 0xffffffff808c483c at softclock_call_cc+0x16c
#10 0xffffffff808c4c84 at softclock+0x94
#11 0xffffffff80883beb at intr_event_execute_handlers+0xab
#12 0xffffffff80884036 at ithread_loop+0x96
#13 0xffffffff8088189a at fork_exit+0x9a
#14 0xffffffff80c7506e at fork_trampoline+0xe
Uptime: 1m14s
Dumping 1417 out of 32645 MB:..2%..11%..21%..31%..41%..51%..61%..72%..81%..91%

Reading symbols from /boot/kernel/nullfs.ko.symbols...done.
Loaded symbols for /boot/kernel/nullfs.ko.symbols
Reading symbols from /boot/kernel/zfs.ko.symbols...done.
Loaded symbols for /boot/kernel/zfs.ko.symbols
Reading symbols from /boot/kernel/opensolaris.ko.symbols...done.
Loaded symbols for /boot/kernel/opensolaris.ko.symbols
Reading symbols from /boot/kernel/geom_linux_lvm.ko.symbols...done.
Loaded symbols for /boot/kernel/geom_linux_lvm.ko.symbols
Reading symbols from /boot/kernel/uhid.ko.symbols...done.
Loaded symbols for /boot/kernel/uhid.ko.symbols
Reading symbols from /boot/kernel/ctl.ko.symbols...done.
Loaded symbols for /boot/kernel/ctl.ko.symbols
Reading symbols from /boot/kernel/iscsi.ko.symbols...done.
Loaded symbols for /boot/kernel/iscsi.ko.symbols
Reading symbols from /boot/kernel/kgssapi_krb5.ko.symbols...done.
Loaded symbols for /boot/kernel/kgssapi_krb5.ko.symbols
Reading symbols from /boot/kernel/kgssapi.ko.symbols...done.
Loaded symbols for /boot/kernel/kgssapi.ko.symbols
Reading symbols from /boot/kernel/crypto.ko.symbols...done.
Loaded symbols for /boot/kernel/crypto.ko.symbols
Reading symbols from /boot/kernel/rc4.ko.symbols...done.
Loaded symbols for /boot/kernel/rc4.ko.symbols
Reading symbols from /boot/kernel/nfsserver.ko.symbols...done.
Loaded symbols for /boot/kernel/nfsserver.ko.symbols
Reading symbols from /boot/kernel/nfs_common.ko.symbols...done.
Loaded symbols for /boot/kernel/nfs_common.ko.symbols
#0  doadump (textdump=<value optimized out>) at pcpu.h:219
219     pcpu.h: No such file or directory.
        in pcpu.h
(kgdb) #0  doadump (textdump=<value optimized out>) at pcpu.h:219
#1  0xffffffff808af440 in kern_reboot (howto=260)
    at /usr/src/sys/kern/kern_shutdown.c:447
#2  0xffffffff808af804 in panic (fmt=<value optimized out>)
    at /usr/src/sys/kern/kern_shutdown.c:754
#3  0xffffffff80c8de32 in trap_fatal (frame=<value optimized out>, 
    eva=<value optimized out>) at /usr/src/sys/amd64/amd64/trap.c:882
#4  0xffffffff80c8e109 in trap_pfault (frame=0xfffffe0838fbb730, usermode=0)
    at /usr/src/sys/amd64/amd64/trap.c:699
#5  0xffffffff80c8d896 in trap (frame=0xfffffe0838fbb730)
    at /usr/src/sys/amd64/amd64/trap.c:463
#6  0xffffffff80c74b32 in calltrap ()
    at /usr/src/sys/amd64/amd64/exception.S:232
#7  0xffffffff8089c531 in __mtx_lock_sleep (c=0xfffff80262b42de0, 
    tid=18446735277754427680, opts=-2117811456, file=0xfffff80008382900 "", 
    line=2) at /usr/src/sys/kern/kern_mutex.c:433
#8  0xffffffff8089c36d in __mtx_lock_flags (c=<value optimized out>, 
    opts=137898272, 
    file=0xffffffff81c4c300 "NING: %s: failed to allocate %zd bytes\n", 
    line=137898240) at /usr/src/sys/kern/kern_mutex.c:224
#9  0xffffffff81c49aab in icl_pdu_queue (ip=0xfffff80262a38420)
    at /usr/src/sys/modules/iscsi/../../dev/iscsi/icl.c:955
#10 0xffffffff81c2b81a in cfiscsi_pdu_queue (response=0xfffff80262a38420)
    at /usr/src/sys/modules/ctl/../../cam/ctl/ctl_frontend_iscsi.c:390
#11 0xffffffff808c483c in softclock_call_cc (c=0xfffff800085c4c60, 
    cc=0xffffffff814f3180, direct=0) at /usr/src/sys/kern/kern_timeout.c:682
#12 0xffffffff808c4c84 in softclock (arg=0xffffffff814f3180)
    at /usr/src/sys/kern/kern_timeout.c:810
#13 0xffffffff80883beb in intr_event_execute_handlers (
    p=<value optimized out>, ie=0xfffff80008360800)
    at /usr/src/sys/kern/kern_intr.c:1263
#14 0xffffffff80884036 in ithread_loop (arg=0xfffff80008366de0)
    at /usr/src/sys/kern/kern_intr.c:1276
#15 0xffffffff8088189a in fork_exit (
    callout=0xffffffff80883fa0 <ithread_loop>, arg=0xfffff80008366de0, 
    frame=0xfffffe0838fbbac0) at /usr/src/sys/kern/kern_fork.c:995
#16 0xffffffff80c7506e in fork_trampoline ()
    at /usr/src/sys/amd64/amd64/exception.S:606
#17 0x0000000000000000 in ?? ()
Current language:  auto; currently minimal
(kgdb)

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