Date: Tue, 29 Dec 1998 21:30:02 -0800 (PST) From: Kris Kennaway <kkennawa@physics.adelaide.edu.au> To: freebsd-bugs@FreeBSD.ORG Subject: Re: kern/9218: sysctl crashes system with bad args Message-ID: <199812300530.VAA11958@freefall.freebsd.org>
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The following reply was made to PR kern/9218; it has been noted by GNATS.
From: Kris Kennaway <kkennawa@physics.adelaide.edu.au>
To: freebsd-gnats-submit@freebsd.org, gary@hotlava.com
Cc: Subject: Re: kern/9218: sysctl crashes system with bad args
Date: Wed, 30 Dec 1998 15:49:45 +1030 (CST)
For kicks, I tried this as an unprivileged user, and got the following
crashdump:
Script started on Tue Dec 29 19:52:22 1998
GDB is free software and you are welcome to 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.
GDB 4.16 (i386-unknown-freebsd), Copyright 1996 Free Software Foundation, Inc.
(kgdb) symbol-file kernel
Reading symbols from kernel...done.
(kgdb) exec-file /var/crash/kernel.1
(kgdb) core-file /var/crash/vmcore.1
IdlePTD 2756608
initial pcb at 23eb90
panicstr: kmem_malloc(134537216): kmem_map too small: 3780608 total allocated
panic messages:
---
panic: kmem_malloc(134537216): kmem_map too small: 3780608 total allocated
syncing disks... 8 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 giving up
dumping to dev 30001, offset 2240
dump 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 boot (howto=256) at ../../kern/kern_shutdown.c:285
../../kern/kern_shutdown.c:285: No such file or directory.
(kgdb) where
#0 boot (howto=256) at ../../kern/kern_shutdown.c:285
#1 0xf012e13d in panic (
fmt=0xf021d38a "kmem_malloc(%d): kmem_map too small: %d total allocated")
at ../../kern/kern_shutdown.c:446
#2 0xf01cc535 in kmem_malloc (map=0xf0246a90, size=134537216, waitflag=0)
at ../../vm/vm_kern.c:301
#3 0xf012ae82 in malloc (size=134536817, type=0xf022dd4c, flags=0)
at ../../kern/kern_malloc.c:151
#4 0xf013194a in sysctl_sysctl_name2oid (oidp=0xf022de04, arg1=0x0, arg2=0,
req=0xf3893e8c) at ../../kern/kern_sysctl.c:423
#5 0xf0131374 in sysctl_root (oidp=0x0, arg1=0xf3893f18, arg2=2,
req=0xf3893e8c) at ../../kern/kern_sysctl.c:795
#6 0xf0131526 in userland_sysctl (p=0xf37a3f00, name=0xf3893f18, namelen=2,
old=0x8056f00, oldlenp=0x804ddb0, inkernel=0, new=0x804de50,
newlen=134536816, retval=0xf3893f14) at ../../kern/kern_sysctl.c:890
#7 0xf01313d6 in __sysctl (p=0xf37a3f00, uap=0xf3893f84)
at ../../kern/kern_sysctl.c:826
#8 0xf01e7ae4 in syscall (frame={tf_es = 39, tf_ds = 39, tf_edi = 134549536,
tf_esi = 7, tf_ebp = -272639632, tf_isp = -209109036,
tf_ebx = 672029128, tf_edx = 671594204, tf_ecx = 671594237,
tf_eax = 202, tf_trapno = 12, tf_err = 2, tf_eip = 672268865,
tf_cs = 31, tf_eflags = 530, tf_esp = -272639792, tf_ss = 39})
at ../../i386/i386/trap.c:1064
#9 0xf01dbfdc in Xint0x80_syscall ()
---Type <return> to continue, or q <return> to quit---
#10 0x28068c59 in ?? ()
#11 0x280d134f in ?? ()
#12 0x8048d8d in ?? ()
#13 0x8048cb4 in ?? ()
(kgdb)
Script done on Tue Dec 29 19:53:13 1998
Hope this helps someone.
Kris
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