Re: ufs related panic.

On Tue, Jun 10, 2008 at 10:38 PM, Ian FREISLICH <ianf_at_clue.co.za> wrote:
> Hi
>
> During the daily periodic jobs shortly after 3am I got this panic.
> I'll keep the kernel and core on hand for a week or two.
>
> Fatal trap 12: page fault while in kernel mode
> fault virtual address   = 0x0
> fault code              = supervisor write, page not present
> instruction pointer     = 0x20:0xc05d9158
> stack pointer           = 0x28:0xc3b4380c
> frame pointer           = 0x28:0xc3b43848
> code segment            = base 0x0, limit 0xfffff, type 0x1b
>                        = DPL 0, pres 1, def32 1, gran 1
> processor eflags        = interrupt enabled, resume, IOPL = 0
> current process         = 1285 (find)
> trap number             = 12
> panic: page fault
> KDB: stack backtrace:
> db_trace_self_wrapper(c070d276,c3b436ac,c0562952,c070b388,c077c2c0,...) at db_tr
> ace_self_wrapper+0x26
> kdb_backtrace(c070b388,c077c2c0,c06fa6f5,c3b436b8,c3b436b8,...) at kdb_backtrace
> +0x29
> panic(c06fa6f5,c072441f,c42b9a2c,1,1,...) at panic+0xaa
> trap_fatal(c7b0c1c0,0,2,8,c4479890,...) at trap_fatal+0x2f9
> trap_pfault(c3b4374c,c05910aa,c42b98c0,c3b4374c,c,...) at trap_pfault+0x240
> trap(c3b437cc) at trap+0x393
> calltrap() at calltrap+0x6
> --- trap 0xc, eip = 0xc05d9158, esp = 0xc3b4380c, ebp = 0xc3b43848 ---
> vgonel(c76c753c,c3b4387c,2,0,50,...) at vgonel+0x271
> vnlru_free(0,0,0,0,0,...) at vnlru_free+0x2bb
> getnewvnode(c070767d,c3f2978c,c0752700,c3b43908,c3b4399c,...) at getnewvnode+0x6
> 8
> ffs_vget(c3f2978c,91443d,80000,c3b4399c,c3b439ac,...) at ffs_vget+0x104
> ufs_lookup(c3b439e4,c3b43a04,c05ca463,c0752700,c3b439e4,...) at ufs_lookup+0xa5e
> VOP_CACHEDLOOKUP_APV(c0752700,c3b439e4,c3b43bb0,c3b43b9c,c7e82e00,...) at VOP_CA
> CHEDLOOKUP_APV+0x44
> vfs_cache_lookup(c3b43a64,c3b43a1c,c50a8000,80000,c3b43a84,...) at vfs_cache_loo
> kup+0xc6
> VOP_LOOKUP_APV(c0752700,c3b43a64,c0711327,1b0,c0547229,...) at VOP_LOOKUP_APV+0x
> 48
> lookup(c3b43b84,c3f2c400,400,c3b43ba4,0,...) at lookup+0x56a
> namei(c3b43b84,c3b43b24,60,0,c42b98c0,...) at namei+0x480
> kern_statat(c42b98c0,200,ffffff9c,814d408,0,...) at kern_statat+0x5e
> kern_lstat(c42b98c0,814d408,0,c3b43c18,c0569524,...) at kern_lstat+0x36
> lstat(c42b98c0,c3b43cfc,8,c059320c,c42b98c0,...) at lstat+0x2b
> syscall(c3b43d38) at syscall+0x2fe
> Xint0x80_syscall() at Xint0x80_syscall+0x20
> --- syscall (190, FreeBSD ELF32, lstat), eip = 0x2814b853, esp = 0xbfbfeb8c, ebp
>  = 0xbfbfec18 ---
> Uptime: 5d4h27m35s
> Physical memory: 998 MB
> Dumping 176 MB: 161 145 129 113 97 81 65 49 33 17 1
> (kgdb)  bt
> #0  doadump () at pcpu.h:196
> #1  0xc0562793 in boot (howto=260) at /usr/src/sys/kern/kern_shutdown.c:418
> #2  0xc056298e in panic (fmt=Variable "fmt" is not available.
> ) at /usr/src/sys/kern/kern_shutdown.c:572
> #3  0xc06c7ad2 in trap_fatal (frame=0xc3b437cc, eva=0)
>    at /usr/src/sys/i386/i386/trap.c:934
> #4  0xc06c7d1e in trap_pfault (frame=0xc3b437cc, usermode=0, eva=0)
>    at /usr/src/sys/i386/i386/trap.c:847
> #5  0xc06c863b in trap (frame=0xc3b437cc) at /usr/src/sys/i386/i386/trap.c:525
> #6  0xc06b0b6b in calltrap () at /usr/src/sys/i386/i386/exception.s:165
> #7  0xc05d9158 in vgonel (vp=0xc76c753c) at /usr/src/sys/kern/vfs_subr.c:997
> #8  0xc05dc17b in vnlru_free (count=1) at /usr/src/sys/kern/vfs_subr.c:878
> #9  0xc05dc2b2 in getnewvnode (tag=0xc070767d "ufs", mp=0xc3f2978c,
>    vops=0xc0752700, vpp=0xc3b43908) at /usr/src/sys/kern/vfs_subr.c:900
> #10 0xc0657453 in ffs_vget (mp=0xc3f2978c, ino=9520189, flags=524288,
>    vpp=0xc3b4399c) at /usr/src/sys/ufs/ffs/ffs_vfsops.c:1345
> #11 0xc0662573 in ufs_lookup (ap=0xc3b439e4)
>    at /usr/src/sys/ufs/ufs/ufs_lookup.c:599
> #12 0xc06d12d2 in VOP_CACHEDLOOKUP_APV (vop=0xc0752700, a=0xc3b439e4)
>    at vnode_if.c:153
> #13 0xc05ca463 in vfs_cache_lookup (ap=0xc3b43a64) at vnode_if.h:80
> #14 0xc06d2d21 in VOP_LOOKUP_APV (vop=0xc0752c20, a=0xc3b43a64)
>    at vnode_if.c:99
> #15 0xc05d0386 in lookup (ndp=0xc3b43b84) at vnode_if.h:54
> #16 0xc05d10d8 in namei (ndp=0xc3b43b84) at /usr/src/sys/kern/vfs_lookup.c:239
> #17 0xc05df5d7 in kern_statat (td=0xc42b98c0, flag=512, fd=-100,
>    path=0x814d408 <Address 0x814d408 out of bounds>, pathseg=UIO_USERSPACE,
>    sbp=0xc3b43c18) at /usr/src/sys/kern/vfs_syscalls.c:2327
> #18 0xc05df747 in kern_lstat (td=0xc42b98c0,
>    path=0x814d408 <Address 0x814d408 out of bounds>, pathseg=UIO_USERSPACE,
>    sbp=0xc3b43c18) at /usr/src/sys/kern/vfs_syscalls.c:2376
> #19 0xc05df7db in lstat (td=0xc42b98c0, uap=0xc3b43cfc)
>    at /usr/src/sys/kern/vfs_syscalls.c:2366
> #20 0xc06c803a in syscall (frame=0xc3b43d38)
>    at /usr/src/sys/i386/i386/trap.c:1081
> #21 0xc06b0bd0 in Xint0x80_syscall () at /usr/src/sys/i386/i386/exception.s:261
> #22 0x00000033 in ?? ()

Ian,
      When did you sync / rebuild -CURRENT? I was curious because I've
been seeing some WITNESS warnings with the FreeBSD FS VM related API's
recently.
Thanks,
-Garrett