On 03/05/14 20:24, Poul-Henning Kamp wrote:

Just tried a current kernel -r 262780 on my laptop.

When wlan0 comes up (if_iwn) it explodes with something about witness
and rtentry.c, but it clears the screen before I can get a photo...

Looks trivial to reproduce.

svn r262799, witness disabled, explodes much later here, also system with iwn if it's related.

pid 911 was:
 65  911    1   0  52  0 14556   0 select   Ds    -  0:00.00 [dhclient]

no trace with symbols because kgdb doesn't like that clang creates.
Dwarf Error: wrong version in compilation unit header (is 4, should be 2) [in module /boot/kernel/kernel.symbols]

Configuring syscons: keymap
Sleeping thread (tid 100073, pid 911) owns a non-sleepable lock
KDB: stack backtrace of thread 100073:
sched_switch() at sched_switch+0x20a/frame 0xfffffe0233f31690
mi_switch() at mi_switch+0xbe/frame 0xfffffe0233f316d0
sleepq_catch_signals() at sleepq_catch_signals+0xab/frame 0xfffffe0233f31730
sleepq_timedwait_sig() at sleepq_timedwait_sig+0xf/frame 0xfffffe0233f31760
_cv_timedwait_sig_sbt() at _cv_timedwait_sig_sbt+0x18b/frame 0xfffffe0233f317c0
seltdwait() at seltdwait+0xa4/frame 0xfffffe0233f31800
sys_poll() at sys_poll+0x3a3/frame 0xfffffe0233f319a0
amd64_syscall() at amd64_syscall+0x289/frame 0xfffffe0233f31ab0
Xfast_syscall() at Xfast_syscall+0xfb/frame 0xfffffe0233f31ab0
--- syscall (209, FreeBSD ELF64, sys_poll), rip = 0x800b2972a, rsp = 0x7fffffffdc68, rbp = 0x7fffffffdca0 ---
panic: sleeping thread
cpuid = 3
KDB: stack backtrace:
db_trace_self_wrapper() at db_trace_self_wrapper+0x2b/frame 0xfffffe0234088230
kdb_backtrace() at kdb_backtrace+0x39/frame 0xfffffe02340882e0
panic() at panic+0x155/frame 0xfffffe0234088360
propagate_priority() at propagate_priority+0x192/frame 0xfffffe0234088390
turnstile_wait() at turnstile_wait+0x32b/frame 0xfffffe02340883e0
__mtx_lock_sleep() at __mtx_lock_sleep+0xfc/frame 0xfffffe0234088410
in_matroute() at in_matroute+0x4e/frame 0xfffffe0234088440
rtalloc1_fib() at rtalloc1_fib+0x6d/frame 0xfffffe02340884e0
in_lltable_lookup() at in_lltable_lookup+0x1f6/frame 0xfffffe0234088530
arpresolve() at arpresolve+0x159/frame 0xfffffe02340885b0
ether_output() at ether_output+0x1dd/frame 0xfffffe0234088620
ip_output() at ip_output+0xf50/frame 0xfffffe0234088710
udp_send() at udp_send+0x86f/frame 0xfffffe02340887d0
sosend_dgram() at sosend_dgram+0x3bd/frame 0xfffffe0234088850
kern_sendit() at kern_sendit+0x1c1/frame 0xfffffe0234088900
sendit() at sendit+0x129/frame 0xfffffe0234088950
sys_sendto() at sys_sendto+0x4d/frame 0xfffffe02340889a0
amd64_syscall() at amd64_syscall+0x289/frame 0xfffffe0234088ab0
Xfast_syscall() at Xfast_syscall+0xfb/frame 0xfffffe0234088ab0
--- syscall (133, FreeBSD ELF64, sys_sendto), rip = 0x8013cfdfa, rsp = 0x7fffffffbb68, rbp = 0x7fffffffc430 ---
KDB: enter: panic
Uptime: 20s
Dumping 393 out of 8063 MB:..5%..13%..21%..33%..41%..53%..61%..74%..82%..94%

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