Date: Wed, 29 Aug 2001 13:36:03 -0700 From: Kris Kennaway <kris@obsecurity.org> To: Chris Pockele <chrisp@belgacom.net> Cc: Kris Kennaway <kris@obsecurity.org>, freebsd-gnats-submit@FreeBSD.org, fs@FreeBSD.org Subject: Re: misc/30168: 4-stable, crash when writing to msdos fs Message-ID: <20010829133603.C75228@xor.obsecurity.org> In-Reply-To: <3B8CD565.A4A52CC6@belgacom.net>; from chrisp@belgacom.net on Wed, Aug 29, 2001 at 01:43:33PM %2B0200 References: <3B8CBCAB.97D88562@belgacom.net> <20010829031921.A69280@xor.obsecurity.org> <3B8CD565.A4A52CC6@belgacom.net>
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On Wed, Aug 29, 2001 at 01:43:33PM +0200, Chris Pockele wrote:
> > That's still not a traceback..please try and obtain that.
> >
> Here is the output of
>
> gdb -k /sys/compile/DEBUG/kernel.debug /var/crash/vmcore.1
Thanks, that was what's needed. Now to find an msdosfs guru to debug
this :)
Kris
>
> (kgdb) where
>
> ----
> Script started on Wed Aug 29 13:34:24 2001
> freedaemon# gdb -k /sys/compile/DEBUG/kernel.debug
> /var/crash/vmESC[Kcore.1^M
> GNU gdb 4.18
> Copyright 1998 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 "i386-unknown-freebsd"...
> IdlePTD 4874240
> initial pcb at 3ee7e0
> panicstr: page fault
> panic messages:
> ---
> Fatal trap 12: page fault while in kernel mode
> fault virtual address = 0xe0f6effc
> fault code = supervisor read, page not present
> instruction pointer = 0x8:0xc01f8dd3
> stack pointer = 0x10:0xc8565d14
> frame pointer = 0x10:0xc8565d24
> 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 = 273 (cp)
> interrupt mask = none
> trap number = 12
> panic: page fault
>
> syncing disks... 46 2 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
> 1: dev:#ad/0x60002, flags:00100020, blkno:8344, lblkno:8344
> giving up on 1 buffers
> Uptime: 37s
>
> dumping to dev #ad/0x30001, offset 269872
> dump ata0: resetting devices .. done
> 128 127 126 125 124 123 122 121 120 119 118 117 116 115 114 113 112 111
> 110 109
> 108 107 106 105 104 103 102 101 100 99 98 97 96 95 94 93 92 91 90 89 88
> 87 86 85
> 84 83 82 81 80 79 78 77 76 75 74 73 72 71 70 69 68 67 66 65 64 63 62 61
> 60 59 5
> 8 57 56 55 54 53 52 51 50 49 48 47 46 45 44 43 42 41 40 39 38 37 36 35
> 34 33 32
> 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10 9 8 7
> 6 5 4 3
> 2 1
> ---
> #0 dumpsys () at ../../kern/kern_shutdown.c:473
> 473 if (dumping++) {
> (kgdb) where
> #0 dumpsys () at ../../kern/kern_shutdown.c:473
> #1 0xc01bda74 in boot (howto=256) at ../../kern/kern_shutdown.c:313
> #2 0xc01bde54 in poweroff_wait (junk=0xc03a07ea, howto=-1069939985)
> at ../../kern/kern_shutdown.c:581
> #3 0xc03339c3 in trap_fatal (frame=0xc8565cd4, eva=3774279676)
> at ../../i386/i386/trap.c:956
> #4 0xc033367d in trap_pfault (frame=0xc8565cd4, usermode=0,
> eva=3774279676)
> at ../../i386/i386/trap.c:849
> #5 0xc03331e7 in trap (frame={tf_fs = -933887984, tf_es = -1071775728,
> tf_ds = -933625840, tf_edi = 8344, tf_esi = -1057558528,
> tf_ebp = -933864156, tf_isp = -933864192, tf_ebx = -1057562624,
> tf_edx = 134217727, tf_ecx = 31, tf_eax = -2147483648, tf_trapno =
> 12,
> tf_err = 0, tf_eip = -1071673901, tf_cs = 8, tf_eflags = 66182,
> tf_esp = 268435455, tf_ss = 268435455}) at
> ../../i386/i386/trap.c:448
> #6 0xc01f8dd3 in updatefats (pmp=0xc0f6e000, bp=0xc3703284, fatbn=8344)
> at ../../msdosfs/msdosfs_fat.c:353
> #7 0xc01f947e in fatchain (pmp=0xc0f6e000, start=1064363, count=0,
> fillwith=4294967295) at ../../msdosfs/msdosfs_fat.c:674
> #8 0xc01f959a in chainalloc (pmp=0xc0f6e000, start=1064363, count=1,
> fillwith=4294967295, retcluster=0xc8565df0, got=0xc8565dec)
> at ../../msdosfs/msdosfs_fat.c:748
> #9 0xc01f979a in clusteralloc (pmp=0xc0f6e000, start=0, count=1,
> fillwith=4294967295, retcluster=0xc8565df0, got=0xc8565dec)
> at ../../msdosfs/msdosfs_fat.c:842
> ---Type <return> to continue, or q <return> to quit---
> #10 0xc01f9c2a in extendfile (dep=0xc0f5c400, count=1, bpp=0x0, ncp=0x0,
> flags=0) at ../../msdosfs/msdosfs_fat.c:1034
> #11 0xc01fcf0e in msdosfs_write (ap=0xc8565e78)
> at ../../msdosfs/msdosfs_vnops.c:725
> #12 0xc01f28a2 in vn_write (fp=0xc0f69bc0, uio=0xc8565ee4,
> cred=0xc0f64600,
> flags=0, p=0xc7b665e0) at vnode_if.h:363
> #13 0xc01cc93a in dofilewrite (p=0xc7b665e0, fp=0xc0f69bc0, fd=4,
> buf=0x28058000, nbyte=187, offset=-1, flags=0) at
> ../../sys/file.h:162
> #14 0xc01cc7eb in write (p=0xc7b665e0, uap=0xc8565f80)
> at ../../kern/sys_generic.c:329
> #15 0xc0333c39 in syscall2 (frame={tf_fs = 47, tf_es = 47, tf_ds = 47,
> tf_edi = 671449088, tf_esi = 671449088, tf_ebp = -1077937572,
> tf_isp = -933863468, tf_ebx = 187, tf_edx = 4, tf_ecx = 1, tf_eax
> = 4,
> tf_trapno = 12, tf_err = 2, tf_eip = 134561808, tf_cs = 31,
> tf_eflags = 663, tf_esp = -1077937632, tf_ss = 47})
> at ../../i386/i386/trap.c:1155
> #16 0xc0324d75 in Xint0x80_syscall ()
> #17 0x8048989 in ?? ()
> #18 0x804851a in ?? ()
> #19 0x8048135 in ?? ()
> (kgdb) exit
> Undefined command: "exit". Try "help".
> (kgdb) quit
> freedaemon# exit
>
> Script done on Wed Aug 29 13:35:00 2001
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