kern/87791: Kernel crash when running df
kthrow1
kthrow1 at CCRS.NRCan.gc.ca
Tue Oct 25 06:50:41 PDT 2005
The following reply was made to PR kern/87791; it has been noted by GNATS.
From: kthrow1 <kthrow1 at CCRS.NRCan.gc.ca>
To: freebsd-gnats-submit at FreeBSD.org
Cc:
Subject: Re: kern/87791: Kernel crash when running df
Date: Tue, 25 Oct 2005 09:41:05 -0400
Kris Kennaway wrote:
> On Fri, Oct 21, 2005 at 04:31:34PM +0000, Kerry Throw wrote:
>
>
>>FreeBSD-RC1 #0: Sun Oct 9 20;32:57 UTC 2005
>>root at x64.samson.home:/usr/obj/usr/src/sys/GENERIC
>>i386
>>
>>>Description:
>>
>>Fatal Trap 12: page fault while in kernel mode
>>fault virtual address = 0x0
>>fault code = supervisor read, page not present
>>instruction pointer = 0x20:0xc05ff472
>>stack pointer = 0x28:0xd1737654
>>frame pointer = 0x28:0xd1737668
>>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 = 5619 (df)
>>trap number = 12
>>panic:page fault
>>uptime: 20h28m31s
>>
>>A crash dump is also availabe.
>
>
> Please follow the directions in the chapter on kernel debugging in the
> developers' handbook.
>
> Thanks,
> Kris
>
test-a# kgdb kernel.debug /var/crash/vmcore.0
[GDB will not be able to debug user-mode threads: /usr/lib/libthread_db.so: Undefined symbol "ps_pglobal_lookup"]
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This GDB was configured as "i386-marcel-freebsd".
Unread portion of the kernel message buffer:
Fatal trap 12: page fault while in kernel mode
fault virtual address = 0x0
fault code = supervisor read, page not present
instruction pointer = 0x20:0xc05ff472
stack pointer = 0x28:0xd1737654
frame pointer = 0x28:0xd1737668
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 = 5619 (df)
trap number = 12
panic: page fault
Uptime: 20h28m31s
Dumping 255 MB (2 chunks)
chunk 0: 1MB (160 pages) ... ok
chunk 1: 255MB (65182 pages) 239 223 207 191 175 159 143 127 111 95 79 63 47 31 15
#0 doadump () at pcpu.h:165
165 pcpu.h: No such file or directory.
in pcpu.h
(kgdb) list *0xc05ff472
0xc05ff472 is in g_io_request (/usr/src/sys/geom/geom_io.c:259).
254 KASSERT(bp->bio_length % cp->provider->sectorsize == 0,
255 ("wrong length %jd for sectorsize %u",
256 bp->bio_length, cp->provider->sectorsize));
257 }
258
259 g_trace(G_T_BIO, "bio_request(%p) from %p(%s) to %p(%s) cmd %d",
260 bp, cp, cp->geom->name, pp, pp->name, bp->bio_cmd);
261
262 bp->bio_from = cp;
263 bp->bio_to = pp;
(kgdb) backtrace
#0 doadump () at pcpu.h:165
#1 0xc0637806 in boot (howto=260) at /usr/src/sys/kern/kern_shutdown.c:399
#2 0xc0637a9c in panic (fmt=0xc084d766 "%s") at /usr/src/sys/kern/kern_shutdown.c:555
#3 0xc0806e60 in trap_fatal (frame=0xd1737614, eva=0) at /usr/src/sys/i386/i386/trap.c:831
#4 0xc0806bcb in trap_pfault (frame=0xd1737614, usermode=0, eva=0) at /usr/src/sys/i386/i386/trap.c:742
#5 0xc0806809 in trap (frame=
{tf_fs = -780992504, tf_es = -1067319256, tf_ds = 40, tf_edi = -1038245440, tf_esi = 0, tf_ebp = -780962200, tf_isp = -7809622
40, tf_ebx = -1040883580, tf_edx = 2048, tf_ecx = 0, tf_eax = 1, tf_trapno = 12, tf_err = 0, tf_eip = -1067453326, tf_cs = 32, tf_ef
lags = 66178, tf_esp = 1, tf_ss = 0}) at /usr/src/sys/i386/i386/trap.c:432
#6 0xc07f600a in calltrap () at /usr/src/sys/i386/i386/exception.s:139
#7 0xc05ff472 in g_io_request (bp=0xc1f56084, cp=0xc21da1c0) at /usr/src/sys/geom/geom_io.c:259
#8 0xc06019bd in g_vfs_strategy (bo=0x1, bp=0xc6666f10) at /usr/src/sys/geom/geom_vfs.c:106
#9 0xc06098fd in cd9660_strategy (ap=0x1) at /usr/src/sys/isofs/cd9660/cd9660_vnops.c:755
#10 0xc0816c79 in VOP_STRATEGY_APV (vop=0xc08bc420, a=0xd17376bc) at vnode_if.c:1796
#11 0xc06813fc in bufstrategy (bo=0xc2018d80, bp=0x1) at vnode_if.h:928
#12 0xc067bd91 in breadn (vp=0xc2018cc0, blkno=0, size=2048, rablkno=0x0, rabsize=0x0, cnt=0, cred=0x0, bpp=0x1) at buf.h:415
#13 0xc067bcd4 in bread (vp=0xc2018cc0, blkno=0, size=2048, cred=0x0, bpp=0xd1737748) at /usr/src/sys/kern/vfs_bio.c:719
#14 0xc0606209 in cd9660_blkatoff (vp=0x800, offset=0, res=0x0, bpp=0xd1737780) at /usr/src/sys/isofs/cd9660/cd9660_lookup.c:406
#15 0xc060890f in cd9660_vget_internal (mp=0xc1797d00, ino=108544, flags=2, vpp=0xd1737804, relocated=1, isodir=0xc1bd27a8)
at /usr/src/sys/isofs/cd9660/cd9660_vfsops.c:751
#16 0xc06085dd in cd9660_root (mp=0xc1626400, flags=2, vpp=0xd1737804, td=0xc1ab6d80)
at /usr/src/sys/isofs/cd9660/cd9660_vfsops.c:549
#17 0xc0686a7e in lookup (ndp=0xd17378a0) at /usr/src/sys/kern/vfs_lookup.c:623
#18 0xc06860ee in namei (ndp=0xd17378a0) at /usr/src/sys/kern/vfs_lookup.c:203
#19 0xc068fd5f in kern_statfs (td=0xc1ab6d80, path=0x800 <Address 0x800 out of bounds>, pathseg=2048, buf=0xd1737af4)
at /usr/src/sys/kern/vfs_syscalls.c:251
#20 0xc068fcc1 in statfs (td=0xc1ab6d80, uap=0xd1737d04) at /usr/src/sys/kern/vfs_syscalls.c:234
#21 0xc0807177 in syscall (frame=
{tf_fs = 59, tf_es = 59, tf_ds = 59, tf_edi = 134540432, tf_esi = -1077942080, tf_ebp = -1077940968, tf_isp = -780960412, tf_e
bx = 134540048, tf_edx = 110, tf_ecx = 99, tf_eax = 396, tf_trapno = 0, tf_err = 2, tf_eip = 671886163, tf_cs = 51, tf_eflags = 658,
tf_esp = -1077942228, tf_ss = 59}) at /usr/src/sys/i386/i386/trap.c:976
#22 0xc07f605f in Xint0x80_syscall () at /usr/src/sys/i386/i386/exception.s:200
#23 0x00000033 in ?? ()
Previous frame inner to this frame (corrupt stack?)
(kgdb)
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