Date: Sat, 7 Jul 2007 15:59:24 -0500 From: "Bryan Venteicher" <mr.kodiak@gmail.com> To: freebsd-current@freebsd.org Subject: panic in _mtx_lock_sleep Message-ID: <c4a07e2d0707071359t6eb3aee6gf12ec12ba530a009@mail.gmail.com>
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I got this panic from about a day old current.
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Unread portion of the kernel message buffer:
kernel trap 12 with interrupts disabled
Fatal trap 12: page fault while in kernel mode
cpuid = 0; apic id = 00
fault virtual address = 0x258
fault code = supervisor read data, page not present
instruction pointer = 0x8:0xffffffff8028a71a
stack pointer = 0x10:0xffffffffaf5896c0
frame pointer = 0x10:0xffffffffaf5896f0
code segment = base 0x0, limit 0xfffff, type 0x1b
= DPL 0, pres 1, long 1, def32 0, gran 1
processor eflags = resume, IOPL = 0
current process = 1069 (gweather-applet-2)
panic: from debugger
cpuid = 0
Uptime: 23m45s
Physical memory: 2523 MB
Dumping 409 MB: 394 378 362 346 330 314 298 282 266 250 234 218 202 186 170
154 138 122 106 90 74 58 42 26 10
#0 doadump () at pcpu.h:194
194 pcpu.h: No such file or directory.
in pcpu.h
(kgdb) bt
#0 doadump () at pcpu.h:194
#1 0xffffffff802951b6 in boot (howto=260) at
/usr/src/sys/kern/kern_shutdown.c:409
#2 0xffffffff8029562a in panic (fmt=Variable "fmt" is not available.
) at /usr/src/sys/kern/kern_shutdown.c:563
#3 0xffffffff8018d06c in db_panic (addr=Variable "addr" is not available.
) at /usr/src/sys/ddb/db_command.c:433
#4 0xffffffff8018d66c in db_command_loop () at
/usr/src/sys/ddb/db_command.c:401
#5 0xffffffff8018f24d in db_trap (type=Variable "type" is not available.
) at /usr/src/sys/ddb/db_main.c:222
#6 0xffffffff802bd2da in kdb_trap (type=12, code=0, tf=0xffffffffaf589610)
at /usr/src/sys/kern/subr_kdb.c:502
#7 0xffffffff804a4552 in trap_fatal (frame=0xffffffffaf589610, eva=Variable
"eva" is not available.
) at /usr/src/sys/amd64/amd64/trap.c:690
#8 0xffffffff804a52ac in trap (frame=0xffffffffaf589610) at
/usr/src/sys/amd64/amd64/trap.c:247
#9 0xffffffff8048bede in calltrap () at
/usr/src/sys/amd64/amd64/exception.S:169
#10 0xffffffff8028a71a in _mtx_lock_sleep (m=0xffffff0002637660,
tid=18446742974235165536, opts=Variable "opts" is not available.
)
at /usr/src/sys/kern/kern_mutex.c:361
#11 0xffffffff80334334 in rt_check (lrt=0xffffffffaf589758,
lrt0=0xffffffffaf589748, dst=Variable "dst" is not available.
) at /usr/src/sys/net/route.c:1303
#12 0xffffffff80355255 in arpresolve (ifp=0xffffff0001150800,
rt0=0xffffff0002637870, m=0xffffff00020a5c00,
dst=0xffffff0002110390, desten=0xffffffffaf5897c0 "\224\\\n\002") at
/usr/src/sys/netinet/if_ether.c:373
#13 0xffffffff8032c160 in ether_output (ifp=0xffffff0001150800,
m=0xffffff00020a5c00, dst=0xffffff0002110390, rt0=Variable "rt0" is not
available.
)
at /usr/src/sys/net/if_ethersubr.c:175
#14 0xffffffff803643b8 in ip_output (m=0xffffff00020a5c00, opt=Variable
"opt" is not available.
) at /usr/src/sys/netinet/ip_output.c:547
#15 0xffffffff803c237e in udp_send (so=Variable "so" is not available.
) at /usr/src/sys/netinet/udp_usrreq.c:957
#16 0xffffffff802ebc4f in sosend_dgram (so=0xffffff004309b570, addr=0x0,
uio=Variable "uio" is not available.
) at /usr/src/sys/kern/uipc_socket.c:1053
#17 0xffffffff802ef5f7 in kern_sendit (td=0xffffff0002384360, s=24,
mp=0xffffffffaf589af0, flags=0, control=0x0, segflg=Variable "segflg" is not
available.
)
at /usr/src/sys/kern/uipc_syscalls.c:806
#18 0xffffffff802f25fe in sendit (td=0xffffff0002384360, s=24,
mp=0xffffffffaf589af0, flags=0)
at /usr/src/sys/kern/uipc_syscalls.c:746
#19 0xffffffff802f26e6 in sendto (td=Variable "td" is not available.
) at /usr/src/sys/kern/uipc_syscalls.c:860
#20 0xffffffff804a4b6e in syscall (frame=0xffffffffaf589c70) at
/usr/src/sys/amd64/amd64/trap.c:820
#21 0xffffffff8048c08b in Xfast_syscall () at
/usr/src/sys/amd64/amd64/exception.S:272
#22 0x0000000805497cdc in ?? ()
Previous frame inner to this frame (corrupt stack?)
(kgdb) up 11
#11 0xffffffff80334334 in rt_check (lrt=0xffffffffaf589758,
lrt0=0xffffffffaf589748, dst=Variable "dst" is not available.
) at /usr/src/sys/net/route.c:1303
1303 RT_LOCK(rt); /* NB: gwroute */
(kgdb) l
1298 /* XXX BSD/OS checks dst->sa_family != AF_NS */
1299 if (rt->rt_flags & RTF_GATEWAY) {
1300 if (rt->rt_gwroute == NULL)
1301 goto lookup;
1302 rt = rt->rt_gwroute;
1303 RT_LOCK(rt); /* NB: gwroute */
1304 if ((rt->rt_flags & RTF_UP) == 0) {
1305 RTFREE_LOCKED(rt); /* unlock gwroute */
1306 rt = rt0;
1307 lookup:
(kgdb) p *rt
$1 = {rt_nodes = {{rn_mklist = 0x0, rn_parent = 0xffffff00026375d0, rn_bit =
-1, rn_bmask = 0 '\0', rn_flags = 0 '\0', rn_u = {
rn_leaf = {rn_Key = 0xffffff0038e84d00 "\020\002", rn_Mask = 0x0,
rn_Dupedkey = 0x0}, rn_node = {rn_Off = 954748160,
rn_L = 0x0, rn_R = 0x0}}}, {rn_mklist = 0xffffff0002311060,
rn_parent = 0xffffff0002637990, rn_bit = 63,
rn_bmask = 1 '\001', rn_flags = 0 '\0', rn_u = {rn_leaf = {rn_Key =
0x7 <Address 0x7 out of bounds>,
rn_Mask = 0xffffff0002637960 "`\0201\002", rn_Dupedkey =
0xffffff00026375a0}, rn_node = {rn_Off = 7,
rn_L = 0xffffff0002637960, rn_R = 0xffffff00026375a0}}}},
rt_gateway = 0xffffff0038e84d10, rt_flags = 131076,
rt_ifp = 0xffffff0001150800, rt_ifa = 0xffffff0002680600, rt_rmx =
{rmx_mtu = 1500, rmx_expire = 1421, rmx_pksent = 0},
rt_refcnt = 0, rt_genmask = 0x0, rt_llinfo = 0x0, rt_gwroute = 0x0,
rt_parent = 0x0, rt_mtx = {lock_object = {
lo_name = 0xffffffff80503dda "rtentry", lo_type = 0xffffffff80503dda
"rtentry", lo_flags = 21102592, lo_witness_data = {
lod_list = {stqe_next = 0x0}, lod_witness = 0x0}}, mtx_lock = 6,
mtx_recurse = 0}}
(kgdb) down 1
#10 0xffffffff8028a71a in _mtx_lock_sleep (m=0xffffff0002637660,
tid=18446742974235165536, opts=Variable "opts" is not available.
)
at /usr/src/sys/kern/kern_mutex.c:361
361 owner = (struct thread *)(v & ~MTX_FLAGMASK);
(kgdb) l
356 #ifdef ADAPTIVE_MUTEXES
357 /*
358 * If the current owner of the lock is executing on
another
359 * CPU, spin instead of blocking.
360 */
361 owner = (struct thread *)(v & ~MTX_FLAGMASK);
362 #ifdef ADAPTIVE_GIANT
363 if (TD_IS_RUNNING(owner))
364 #else
365 if (m != &Giant && TD_IS_RUNNING(owner))
(kgdb) p *m
$2 = {lock_object = {lo_name = 0xffffffff80503dda "rtentry", lo_type =
0xffffffff80503dda "rtentry", lo_flags = 21102592,
lo_witness_data = {lod_list = {stqe_next = 0x0}, lod_witness = 0x0}},
mtx_lock = 6, mtx_recurse = 0}
(kgdb) p v
$3 = 6
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