Date: Mon, 22 May 2000 16:59:19 -0700 (PDT) From: Archie Cobbs <archie@whistle.com> To: FreeBSD-gnats-submit@freebsd.org Subject: kern/18763: kernel crashes when sysctl(3) is called Message-ID: <200005222359.QAA13514@bubba.whistle.com>
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>Number: 18763
>Category: kern
>Synopsis: kernel crashes when sysctl(3) is called
>Confidential: no
>Severity: serious
>Priority: high
>Responsible: freebsd-bugs
>State: open
>Quarter:
>Keywords:
>Date-Required:
>Class: sw-bug
>Submitter-Id: current-users
>Arrival-Date: Mon May 22 17:00:01 PDT 2000
>Closed-Date:
>Last-Modified:
>Originator: Archie Cobbs
>Release: FreeBSD 3.4-RELEASE i386
>Organization:
Whistle Communications, Inc.
>Environment:
FreeBSD 3.4-REL
>Description:
The kernel core dumps on the program given below:
Program received signal SIGSEGV, Segmentation fault.
0xc0130e12 in sysctl_sysctl_name (oidp=0xc02220b4, arg1=0xc3204f38, arg2=2,
req=0xc3204ea8) at ../../kern/kern_sysctl.c:249
249 error = SYSCTL_OUT(req, (*oidpp)->oid_name,
(gdb) where
#0 0xc0130e12 in sysctl_sysctl_name (oidp=0xc02220b4, arg1=0xc3204f38,
arg2=2, req=0xc3204ea8) at ../../kern/kern_sysctl.c:249
#1 0xc01317a9 in sysctl_root (oidp=0x0, arg1=0xc3204f30, arg2=4,
req=0xc3204ea8) at ../../kern/kern_sysctl.c:795
#2 0xc0131962 in userland_sysctl (p=0xc31d1200, name=0xc3204f30, namelen=4,
old=0x0, oldlenp=0xbfbfd0fc, inkernel=0, new=0x0, newlen=0,
retval=0xc3204f2c) at ../../kern/kern_sysctl.c:890
#3 0xc0131814 in __sysctl (p=0xc31d1200, uap=0xc3204f94)
at ../../kern/kern_sysctl.c:826
#4 0xc01af407 in syscall (frame={tf_es = 672137255, tf_ds = -1078001625,
tf_edi = 4, tf_esi = 136637068, tf_ebp = -1077948272,
tf_isp = -1021292572, tf_ebx = 672704864, tf_edx = 0, tf_ecx = 0,
tf_eax = 202, tf_trapno = 7, tf_err = 2, tf_eip = 672454616, tf_cs = 31,
tf_eflags = 659, tf_esp = -1077948312, tf_ss = 39})
at ../../i386/i386/trap.c:1100
#5 0xc01a44dc in Xint0x80_syscall ()
>How-To-Repeat:
#include <sys/types.h>
#include <sys/sysctl.h>
#include <stdio.h>
#include <err.h>
int
main(int ac, char *av[])
{
int mib[4] = { 0, 1, 1, 0 };
size_t estimate;
if (sysctl(mib, 4, NULL, &estimate, NULL, 0) != 0)
err(1, "sysctl");
printf("estimate = %d\n", estimate);
return (0);
}
>Fix:
Haven't investigated that yet.
>Release-Note:
>Audit-Trail:
>Unformatted:
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