kern/184320: Kernel dump when try route IPv6-address

Dmitry dilmas.kras at gmail.com
Wed Nov 27 02:20:00 UTC 2013


>Number:         184320
>Category:       kern
>Synopsis:       Kernel dump when try route IPv6-address
>Confidential:   no
>Severity:       non-critical
>Priority:       low
>Responsible:    freebsd-bugs
>State:          open
>Quarter:        
>Keywords:       
>Date-Required:
>Class:          sw-bug
>Submitter-Id:   current-users
>Arrival-Date:   Wed Nov 27 02:20:00 UTC 2013
>Closed-Date:
>Last-Modified:
>Originator:     Dmitry
>Release:        9.1-STABLE
>Organization:
>Environment:
FreeBSD ngs.g-service.ru 9.1-STABLE FreeBSD 9.1-STABLE #1: Sat Jun 22 13:57:50 KRAT 2013     root at ngs.g-service.ru:/usr/obj/usr/src/sys/GENERIC  amd64

>Description:
ngs# kgdb kernel.debug /var/crash/vmcore.0
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This GDB was configured as "amd64-marcel-freebsd"...

Unread portion of the kernel message buffer:


Fatal trap 12: page fault while in kernel mode
cpuid = 0; apic id = 00
fault virtual address   = 0x0
fault code              = supervisor read data, page not present
instruction pointer     = 0x20:0xffffffff809242d9
stack pointer           = 0x28:0xffffff824416b800
frame pointer           = 0x28:0xffffff824416b960
code segment            = base 0x0, limit 0xfffff, type 0x1b
                        = DPL 0, pres 1, long 1, def32 0, gran 1
processor eflags        = interrupt enabled, resume, IOPL = 0
current process         = 55315 (route)
trap number             = 12
panic: page fault
cpuid = 1
KDB: stack backtrace:
#0 0xffffffff8088ed86 at kdb_backtrace+0x66
#1 0xffffffff80858d9e at panic+0x1ce
#2 0xffffffff80bd8320 at trap_fatal+0x290
#3 0xffffffff80bd8658 at trap_pfault+0x1e8
#4 0xffffffff80bd8c5e at trap+0x3be
#5 0xffffffff80bc22df at calltrap+0x8
#6 0xffffffff808c4216 at sosend_generic+0x3f6
#7 0xffffffff808a813e at soo_write+0x5e
#8 0xffffffff808a0ce5 at dofilewrite+0x85
#9 0xffffffff808a101c at kern_writev+0x6c
#10 0xffffffff808a10a4 at sys_write+0x64
#11 0xffffffff80bd7c00 at amd64_syscall+0x540
#12 0xffffffff80bc25c7 at Xfast_syscall+0xf7
Uptime: 221d7h57m1s

..

(kgdb) list *0xffffffff809242d9
0xffffffff809242d9 is in route_output (/usr/src/sys/net/rtsock.c:805).
800                             info.rti_info[RTAX_NETMASK] = rt_mask(rt);
801                             info.rti_info[RTAX_GENMASK] = 0;
802                             if (rtm->rtm_addrs & (RTA_IFP | RTA_IFA)) {
803                                     ifp = rt->rt_ifp;
804                                     if (ifp) {
805                                             info.rti_info[RTAX_IFP] =
806                                                 ifp->if_addr->ifa_addr;
807                                             error = rtm_get_jailed(&info, ifp, rt,
808                                                 &saun, curthread->td_ucred);
809                                             if (error != 0) {

>How-To-Repeat:

>Fix:


>Release-Note:
>Audit-Trail:
>Unformatted:


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