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i386/92039: sysctl -a causes panic
>Number: 92039
>Category: i386
>Synopsis: sysctl -a causes panic
>Confidential: no
>Severity: serious
>Priority: medium
>Responsible: freebsd-i386
>State: open
>Quarter:
>Keywords:
>Date-Required:
>Class: sw-bug
>Submitter-Id: current-users
>Arrival-Date: Fri Jan 20 05:00:20 GMT 2006
>Closed-Date:
>Last-Modified:
>Originator: KOIE Hidetaka
>Release: FreeBSD 7.0-CURRENT i386
>Organization:
surigiken
>Environment:
System: FreeBSD sakura.suri.co.jp 7.0-CURRENT FreeBSD 7.0-CURRENT #0: Fri Jan 13
16:12:30 JST 2006 koie@xxxxxxxxxxxxxxxxx:/usr/obj/usr/src/sys/SAKURA i386
INVARIANTS and WITNESS are disabled.
>Description:
"sysctl -a | less" causes panic very often (not always).
Script started on Fri Jan 20 13:24:59 2006
sakura# uname -a
FreeBSD sakura.suri.co.jp 7.0-CURRENT FreeBSD 7.0-CURRENT #0: Fri Jan 13 16:12:30 JST 2006 koie@xxxxxxxxxxxxxxxxx:/usr/obj/usr/src/sys/SAKURA i386
sakura# kgdb /usr/obj/usr/src/sys/SAKURA/kernel vmcore.30
[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 = 0xbf
fault code = supervisor read, page not present
instruction pointer = 0x20:0xc04cf7e5
stack pointer = 0x28:0xcd3f0ac8
frame pointer = 0x28:0xcd3f0ac8
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 = 50396 (sysctl)
trap number = 12
panic: page fault
Uptime: 3d19h14m8s
Dumping 255 MB (2 chunks)
chunk 0: 1MB (159 pages) ... ok
chunk 1: 255MB (65264 pages) 239 223 207 191 175 159 143 127 111 95 79 63 47 31 15
#0 doadump () at pcpu.h:166
166 pcpu.h: No such file or directory.
in pcpu.h
(kgdb) bt
#0 doadump () at pcpu.h:166
#1 0xc051b2f8 in boot (howto=260) at /usr/src/sys/kern/kern_shutdown.c:399
#2 0xc051b590 in panic (fmt=0xc06bd342 "%s")
at /usr/src/sys/kern/kern_shutdown.c:555
#3 0xc069672c in trap_fatal (frame=0xcd3f0a88, eva=191)
at /usr/src/sys/i386/i386/trap.c:862
#4 0xc0696493 in trap_pfault (frame=0xcd3f0a88, usermode=0, eva=191)
at /usr/src/sys/i386/i386/trap.c:770
#5 0xc06960cd in trap (frame=
{tf_fs = -851509240, tf_es = 40, tf_ds = -851509208, tf_edi = -851506388, tf_esi = -1036914688, tf_ebp = -851506488, tf_isp = -851506508, tf_ebx = -1036914688, tf_edx = -1037927936, tf_ecx = 0, tf_eax = -1, tf_trapno = 12, tf_err = 0, tf_eip = -1068697627, tf_cs = 32, tf_eflags = 66182, tf_esp = -851506320, tf_ss = -1068178089}) at /usr/src/sys/i386/i386/trap.c:455
#6 0xc068826a in calltrap () at /usr/src/sys/i386/i386/exception.s:137
#7 0xc04cf7e5 in dev2udev (x=0xc2227a00)
at /usr/src/sys/fs/devfs/devfs_vnops.c:1169
#8 0xc054e557 in sysctl_kern_ttys (oidp=0xc0708de0, arg1=0x0, arg2=0,
req=0xcd3f0bb4) at /usr/src/sys/kern/tty.c:3011
#9 0xc0523b43 in sysctl_root (oidp=0x0, arg1=0x0, arg2=0, req=0xcd3f0bb4)
at /usr/src/sys/kern/kern_sysctl.c:1248
#10 0xc0523d40 in userland_sysctl (td=0xffffffff, name=0xcd3f0c24, namelen=2,
old=0xcd3f0bb4, oldlenp=0xbfbfd76c, inkernel=0, new=0x0,
newlen=4294967295, retval=0xcd3f0c20, flags=-1)
---Type <return> to continue, or q <return> to quit---
at /usr/src/sys/kern/kern_sysctl.c:1347
#11 0xc0523be3 in __sysctl (td=0xc269b780, uap=0xcd3f0d04)
at /usr/src/sys/kern/kern_sysctl.c:1282
#12 0xc0696a7a in syscall (frame=
{tf_fs = 672399419, tf_es = 672399419, tf_ds = -1078001605, tf_edi = 2, tf_esi = -1077946516, tf_ebp = -1077946600, tf_isp = -851505820, tf_ebx = 672408520, tf_edx = 0, tf_ecx = -1077944304, tf_eax = 202, tf_trapno = 0, tf_err = 2, tf_eip = 672255951, tf_cs = 51, tf_eflags = 658, tf_esp = -1077946660, tf_ss = 59}) at /usr/src/sys/i386/i386/trap.c:1008
#13 0xc06882bf in Xint0x80_syscall ()
at /usr/src/sys/i386/i386/exception.s:190
#14 0x00000033 in ?? ()
Previous frame inner to this frame (corrupt stack?)
(kgdb) quit
sakura# exit
exit
Script done on Fri Jan 20 13:25:41 2006
>How-To-Repeat:
sysctl -a | less
>Fix:
I dont know.
>Release-Note:
>Audit-Trail:
>Unformatted:
