nullfs panic with recent current
Oleg Bulyzhin
oleg at freebsd.org
Thu Sep 11 17:43:43 UTC 2008
Trying to build world, having null mounted /usr/src & /usr/obj, i've got
this panic.
root at slave# uname -a
FreeBSD slave.rinet.ru 8.0-CURRENT FreeBSD 8.0-CURRENT #0 r182885: Tue Sep 9 22:52:56 MSD 2008 root at slave.rinet.ru:/usr/obj/usr/src/sys/slave-smp amd64
root at slave# kgdb kernel.debug /var/crash/vmcore.7
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This GDB was configured as "amd64-marcel-freebsd"...
Unread portion of the kernel message buffer:
Fatal trap 9: general protection fault while in kernel mode
cpuid = 0; apic id = 00
instruction pointer = 0x8:0xffffffff80216e99
stack pointer = 0x10:0xfffffffe6189d5a0
frame pointer = 0x10:0xfffffffe6189d5d0
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 = 47776 (cc1)
panic: from debugger
cpuid = 0
Uptime: 19m15s
Physical memory: 998 MB
Dumping 156 MB: 141 125 109 93 77 61 45 29 13
Reading symbols from /boot/kernel/nullfs.ko...Reading symbols from /boot/kernel/nullfs.ko.symbols...done.
done.
Loaded symbols for /boot/kernel/nullfs.ko
Reading symbols from /boot/kernel/geom_mirror.ko...Reading symbols from /boot/kernel/geom_mirror.ko.symbols...done.
done.
Loaded symbols for /boot/kernel/geom_mirror.ko
Reading symbols from /boot/kernel/ipfw.ko...Reading symbols from /boot/kernel/ipfw.ko.symbols...done.
done.
Loaded symbols for /boot/kernel/ipfw.ko
Reading symbols from /boot/kernel/if_bge.ko...Reading symbols from /boot/kernel/if_bge.ko.symbols...done.
done.
Loaded symbols for /boot/kernel/if_bge.ko
Reading symbols from /boot/kernel/miibus.ko...Reading symbols from /boot/kernel/miibus.ko.symbols...done.
done.
Loaded symbols for /boot/kernel/miibus.ko
Reading symbols from /boot/kernel/if_em.ko...Reading symbols from /boot/kernel/if_em.ko.symbols...done.
done.
Loaded symbols for /boot/kernel/if_em.ko
Reading symbols from /boot/kernel/if_nfe.ko...Reading symbols from /boot/kernel/if_nfe.ko.symbols...done.
done.
Loaded symbols for /boot/kernel/if_nfe.ko
Reading symbols from /boot/kernel/if_vlan.ko...Reading symbols from /boot/kernel/if_vlan.ko.symbols...done.
done.
Loaded symbols for /boot/kernel/if_vlan.ko
#0 doadump () at pcpu.h:196
196 __asm __volatile("movq %%gs:0,%0" : "=r" (td));
(kgdb) l *0xffffffff80216e99
0xffffffff80216e99 is in _mtx_lock_flags (/usr/src/sys/kern/kern_mutex.c:174).
169 void
170 _mtx_lock_flags(struct mtx *m, int opts, const char *file, int line)
171 {
172
173 MPASS(curthread != NULL);
174 KASSERT(m->mtx_lock != MTX_DESTROYED,
175 ("mtx_lock() of destroyed mutex @ %s:%d", file, line));
176 KASSERT(LOCK_CLASS(&m->lock_object) == &lock_class_mtx_sleep,
177 ("mtx_lock() of spin mutex %s @ %s:%d", m->lock_object.lo_name,
178 file, line));
(kgdb) bt
#0 doadump () at pcpu.h:196
#1 0xffffffff8022399a in boot (howto=260)
at /usr/src/sys/kern/kern_shutdown.c:418
#2 0xffffffff80223e37 in panic (fmt=Variable "fmt" is not available.
) at /usr/src/sys/kern/kern_shutdown.c:572
#3 0xffffffff80176fa7 in db_panic (addr=Variable "addr" is not available.
) at /usr/src/sys/ddb/db_command.c:446
#4 0xffffffff801778f9 in db_command (last_cmdp=0xffffffff80530f88,
cmd_table=0x0, dopager=1) at /usr/src/sys/ddb/db_command.c:413
#5 0xffffffff80177b20 in db_command_loop ()
at /usr/src/sys/ddb/db_command.c:466
#6 0xffffffff80179469 in db_trap (type=Variable "type" is not available.
) at /usr/src/sys/ddb/db_main.c:228
#7 0xffffffff802511e0 in kdb_trap (type=9, code=0, tf=0xfffffffe6189d4f0)
at /usr/src/sys/kern/subr_kdb.c:534
#8 0xffffffff8036671d in trap_fatal (frame=0xfffffffe6189d4f0, eva=Variable "eva" is not available.
)
at /usr/src/sys/amd64/amd64/trap.c:754
#9 0xffffffff8036722a in trap (frame=0xfffffffe6189d4f0)
at /usr/src/sys/amd64/amd64/trap.c:560
#10 0xffffffff8034a64e in calltrap ()
at /usr/src/sys/amd64/amd64/exception.S:217
#11 0xffffffff80216e99 in _mtx_lock_flags (m=0xdeadc0dedeadc19e, opts=16,
file=0xffffffff807caa40 "/usr/src/sys/modules/nullfs/../../fs/nullfs/null_vnops.c", line=532) at /usr/src/sys/kern/kern_mutex.c:173
#12 0xffffffff807c9e1c in null_lock (ap=0xfffffffe6189d670)
at /usr/src/sys/modules/nullfs/../../fs/nullfs/null_vnops.c:532
#13 0xffffffff8038413b in VOP_LOCK1_APV (vop=0xffffffff807caee0,
a=0xfffffffe6189d670) at vnode_if.c:1618
---Type <return> to continue, or q <return> to quit---
#14 0xffffffff802b41b7 in _vn_lock (vp=0xffffff001d7981d8, flags=524288,
file=0xffffffff803bf0b2 "/usr/src/sys/kern/vfs_subr.c", line=2151)
at vnode_if.h:839
#15 0xffffffff802a9570 in vrele (vp=0xffffff001d7981d8)
at /usr/src/sys/kern/vfs_subr.c:2151
#16 0xffffffff8029e977 in namei (ndp=0xfffffffe6189da10)
at /usr/src/sys/kern/vfs_lookup.c:226
#17 0xffffffff802b3aaa in vn_open_cred (ndp=0xfffffffe6189da10,
flagp=0xfffffffe6189d95c, cmode=420, cred=0xffffff000173e800,
fp=0xffffff00389661e0) at /usr/src/sys/kern/vfs_vnops.c:190
#18 0xffffffff802b21fe in kern_openat (td=0xffffff0001b736c0, fd=-100,
path=0xc9ec80 <Address 0xc9ec80 out of bounds>, pathseg=Variable "pathseg" is not available.
)
at /usr/src/sys/kern/vfs_syscalls.c:1069
#19 0xffffffff80366c76 in syscall (frame=0xfffffffe6189dc90)
at /usr/src/sys/amd64/amd64/trap.c:898
#20 0xffffffff8034a85b in Xfast_syscall ()
at /usr/src/sys/amd64/amd64/exception.S:338
#21 0x000000000084a53c in ?? ()
Previous frame inner to this frame (corrupt stack?)
(kgdb)
--
Oleg.
================================================================
=== Oleg Bulyzhin -- OBUL-RIPN -- OBUL-RIPE -- oleg at rinet.ru ===
================================================================
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