Bug 18763
| Summary: | kernel crashes when sysctl(3) is called | ||
|---|---|---|---|
| Product: | Base System | Reporter: | Archie Cobbs <archie> |
| Component: | kern | Assignee: | freebsd-bugs (Nobody) <bugs> |
| Status: | Closed FIXED | ||
| Severity: | Affects Only Me | ||
| Priority: | Normal | ||
| Version: | 3.4-RELEASE | ||
| Hardware: | Any | ||
| OS: | Any | ||
State Changed From-To: open->closed Not a problem on 4-stable; 3-stable not supported. |
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 () Fix: Haven't investigated that yet. Note: not a problem on 5.0-CURRENT 2000-06-01 /phk 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); }