Kernel panic after (gdb) attach to threaded process...

[Krok]

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Hello.

I've noticed process with state (ps) TL and was unable to kill it even
with kill -9. When I've tried to gdb this process (or simple truss -p
<pid>) I've got kernel panic.

Here is kernel dump :

# uname -a
FreeBSD alloy.ru 5.3-RELEASE-p5 FreeBSD 5.3-RELEASE-p5 #10: Mon Jan 24
12:08:52 MSK 2005     root at alloy.ru:/usr/obj/usr/src/sys/HITECH  i386
# cat /var/crash/info.0
Good dump found on device /dev/da0s1b
~  Architecture: i386
~  Architecture version: 1
~  Dump length: 1073676288B (1023 MB)
~  Blocksize: 512
~  Dumptime: Wed Jan 26 14:18:42 2005
~  Hostname: alloy.ru
~  Versionstring: FreeBSD 5.3-RELEASE-p5 #10: Mon Jan 24 12:08:52 MSK 2005
~    root at alloy.ru:/usr/obj/usr/src/sys/HITECH
~  Panicstring: page fault
~  Bounds: 0
# kgdb /usr/obj/usr/src/sys/HITECH/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"]
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.
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This GDB was configured as "i386-marcel-freebsd".
doadump () at pcpu.h:159
(kgdb) back
#0  doadump () at pcpu.h:159
#1  0xc04cfbbb in boot (howto=260) at /usr/src/sys/kern/kern_shutdown.c:397
#2  0xc04cfee1 in panic (fmt=0xc060aac0 "%s") at
/usr/src/sys/kern/kern_shutdown.c:553
#3  0xc05e60e0 in trap_fatal (frame=0xec97ab80, eva=68) at
/usr/src/sys/i386/i386/trap.c:809
#4  0xc05e589d in trap (frame=
~      {tf_fs = -325648360, tf_es = -1068761072, tf_ds = 16, tf_edi =
- -1022643772, tf_esi = -1023478608, tf_ebp = -325604332, tf_isp =
- -325604436, tf_ebx = -1007141360, tf_edx = -1023478608, tf_ecx = 4,
tf_eax = 0, tf_trapno = 12, tf_err = 2, tf_eip = -1068543065, tf_cs = 8,
tf_eflags = 65683, tf_esp = 52402, tf_ss = -1068387925}) at
/usr/src/sys/i386/i386/trap.c:247
#5  0xc05d46fa in calltrap () at /usr/src/sys/i386/i386/exception.s:140
#6  0xec970018 in ?? ()
#7  0xc04c0010 in thread_export_context (td=0xc2fef4b0, willexit=10) at
/usr/src/sys/kern/kern_kse.c:852
#8  0xc04f48da in ptrace (td=0xc2fef4b0, uap=0xec97ad14) at
/usr/src/sys/kern/sys_process.c:339
#9  0xc05e63c7 in syscall (frame=
~      {tf_fs = 47, tf_es = 47, tf_ds = 47, tf_edi = 136630285, tf_esi =
52402, tf_ebp = -1077943064, tf_isp = -325603980, tf_ebx = 52402,tf_edx
= 674995596, tf_ecx = 674911724, tf_eax = 26, tf_trapno = 22, tf_err =
2, tf_eip = 674263299, tf_cs = 31, tf_eflags = 514, tf_esp =
- -1077943092, tf_ss = 47}) at /usr/src/sys/i386/i386/trap.c:1001
#10 0xc05d474f in Xint0x80_syscall () at
/usr/src/sys/i386/i386/exception.s:201
#11 0x0000002f in ?? ()
#12 0x0000002f in ?? ()
#13 0x0000002f in ?? ()
#14 0x0824d00d in ?? ()
#15 0x0000ccb2 in ?? ()
#16 0xbfbfe4e8 in ?? ()
#17 0xec97ad74 in ?? ()
#18 0x0000ccb2 in ?? ()
#19 0x283b9d8c in ?? ()
#20 0x283a55ec in ?? ()
#21 0x0000001a in ?? ()
#22 0x00000016 in ?? ()
#23 0x00000002 in ?? ()
#24 0x28307103 in ?? ()
#25 0x0000001f in ?? ()
#26 0x00000202 in ?? ()
#27 0xbfbfe4cc in ?? ()
#28 0x0000002f in ?? ()
#29 0x0000096e in ?? ()
#30 0x0000057f in ?? ()
#31 0x00000689 in ?? ()
#32 0x000002be in ?? ()
#33 0x08bb8000 in ?? ()
#34 0xc30bb8d4 in ?? ()
#35 0xc2fef4b0 in ?? ()
#36 0xec97a96c in ?? ()
#37 0xec97a954 in ?? ()
#38 0xc3b627d0 in ?? ()
#39 0xc04e00db in sched_switch (td=0xccb2, newtd=0xccb2, flags=Cannot
access memory at address 0xbfbfe4f8
) at /usr/src/sys/kern/sched_4bsd.c:865
Previous frame inner to this frame (corrupt stack?)
(kgdb) up 4
No stack.
(kgdb)

Can anybody help with this ?

- --
With best regards,
Krok


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