On Thursday 11 September 2008 01:24:53 pm Oleg Bulyzhin wrote: > > 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 > GNU gdb 6.1.1 [FreeBSD] > Copyright 2004 Free Software Foundation, Inc. > GDB is free software, covered by the GNU General Public License, and you are > welcome to change it and/or distribute copies of it under certain conditions. > Type "show copying" to see the conditions. > There is absolutely no warranty for GDB. Type "show warranty" for details. > 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 _at_ %s:%d", file, line)); > 176 KASSERT(LOCK_CLASS(&m->lock_object) == &lock_class_mtx_sleep, > 177 ("mtx_lock() of spin mutex %s _at_ %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 Given the value of 'm', I'd say the "lvp" in the previous frame is a reference to a free'd vnode. > #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 === > ================================================================ > > _______________________________________________ > freebsd-current_at_freebsd.org mailing list > http://lists.freebsd.org/mailman/listinfo/freebsd-current > To unsubscribe, send any mail to "freebsd-current-unsubscribe_at_freebsd.org" > -- John BaldwinReceived on Thu Sep 11 2008 - 19:43:24 UTC
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