panic: acquiring blockable sleep lock with spinlock or critical section held (rwlock) kmmaplk Stopped at db_enter+0x18: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND *484591 91328 0 0 0 0K syz-executor.0 70534 90431 0 0x2 0x4000480 1 syz-fuzzer db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:398 panic(ffffffff823d2823) at panic+0x15e sys/kern/subr_prf.c:218 witness_checkorder(ffffffff828b4938,1,0) at witness_checkorder+0x1046 sys/kern/subr_witness.c:821 rw_enter_read(ffffffff828b4928) at rw_enter_read+0x66 sys/kern/kern_rwlock.c:111 uvmfault_lookup(ffff8000212c9648,0) at uvmfault_lookup+0xd9 sys/uvm/uvm_fault.c:1495 uvm_fault_check(ffff8000212c9648,ffff8000212c95f0,ffff8000212c95d8,2) at uvm_fault_check+0x3d sys/uvm/uvm_fault.c:513 uvm_fault(ffffffff828b4920,ffff8000244d1000,0,2) at uvm_fault+0xdb sys/uvm/uvm_fault.c:694 kpageflttrap(ffff8000212c97d0,ffff8000244d1fe8) at kpageflttrap+0x202 sys/arch/amd64/amd64/trap.c:265 kerntrap(ffff8000212c97d0) at kerntrap+0xef sys/arch/amd64/amd64/trap.c:321 alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b memcpy() at memcpy+0x15 timeout_run(ffff800021283558) at timeout_run+0xd6 timeout_sync_leave sys/kern/kern_timeout.c:207 [inline] timeout_run(ffff800021283558) at timeout_run+0xd6 sys/kern/kern_timeout.c:676 softclock_process_tick_timeout(ffff800021283558,0) at softclock_process_tick_timeout+0x196 sys/kern/kern_timeout.c:721 softclock(0) at softclock+0x11a sys/kern/kern_timeout.c:752 end trace frame: 0xffff8000212c9a10, count: 0 https://www.openbsd.org/ddb.html describes the minimum info required in bug reports. Insufficient info makes it difficult to find and fix bugs. ddb{0}> ddb{0}> set $lines = 0 ddb{0}> set $maxwidth = 0 ddb{0}> show panic acquiring blockable sleep lock with spinlock or critical section held (rwlock) kmmaplk ddb{0}> trace db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:398 panic(ffffffff823d2823) at panic+0x15e sys/kern/subr_prf.c:218 witness_checkorder(ffffffff828b4938,1,0) at witness_checkorder+0x1046 sys/kern/subr_witness.c:821 rw_enter_read(ffffffff828b4928) at rw_enter_read+0x66 sys/kern/kern_rwlock.c:111 uvmfault_lookup(ffff8000212c9648,0) at uvmfault_lookup+0xd9 sys/uvm/uvm_fault.c:1495 uvm_fault_check(ffff8000212c9648,ffff8000212c95f0,ffff8000212c95d8,2) at uvm_fault_check+0x3d sys/uvm/uvm_fault.c:513 uvm_fault(ffffffff828b4920,ffff8000244d1000,0,2) at uvm_fault+0xdb sys/uvm/uvm_fault.c:694 kpageflttrap(ffff8000212c97d0,ffff8000244d1fe8) at kpageflttrap+0x202 sys/arch/amd64/amd64/trap.c:265 kerntrap(ffff8000212c97d0) at kerntrap+0xef sys/arch/amd64/amd64/trap.c:321 alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b memcpy() at memcpy+0x15 timeout_run(ffff800021283558) at timeout_run+0xd6 timeout_sync_leave sys/kern/kern_timeout.c:207 [inline] timeout_run(ffff800021283558) at timeout_run+0xd6 sys/kern/kern_timeout.c:676 softclock_process_tick_timeout(ffff800021283558,0) at softclock_process_tick_timeout+0x196 sys/kern/kern_timeout.c:721 softclock(0) at softclock+0x11a sys/kern/kern_timeout.c:752 softintr_dispatch(0) at softintr_dispatch+0xfb sys/arch/amd64/amd64/softintr.c:90 Xsoftclock() at Xsoftclock+0x1f alltraps() at alltraps+0x138 end of kernel end trace frame: 0x7f7ffffcc3b0, count: -17 ddb{0}> show registers rdi 0 rsi 0x1 rbp 0xffff8000212c9220 rbx 0xffff8000212c9230 rdx 0x8b rcx 0x2 rax 0x1 r8 0xffffffff81ff95a6 kprintf+0x146 r9 0x1 r10 0x6a6e94fb99dc5699 r11 0x266a47f915be5abf r12 0x3000000008 r13 0xffff8000212c92d0 r14 0x100 r15 0x1 rip 0xffffffff81827748 db_enter+0x18 cs 0x8 rflags 0x246 rsp 0xffff8000212c9210 ss 0 db_enter+0x18: addq $0x8,%rsp ddb{0}> show proc PROC (syz-executor.0) pid=484591 stat=onproc flags process=0 proc=0 pri=79, usrpri=79, nice=20 forw=0xffffffffffffffff, list=0xffff8000212822a8,0xffff800021283c58 process=0xffff800021236950 user=0xffff8000212c4000, vmspace=0xfffffd8008492170 estcpu=36, cpticks=1, pctcpu=0.0 user=0, sys=1, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND *91328 484591 96737 0 7 0 syz-executor.0 91328 32961 96737 0 3 0x4000080 fsleep syz-executor.0 9628 181372 0 0 3 0x14200 bored sosplice 92607 281637 90431 0 2 0x482 syz-executor.1 96737 366983 90431 0 3 0x82 nanosleep syz-executor.0 90431 427597 76313 0 3 0x82 thrsleep syz-fuzzer 90431 70534 76313 0 7 0x4000482 syz-fuzzer 90431 171954 76313 0 3 0x4000082 thrsleep syz-fuzzer 90431 106195 76313 0 3 0x4000082 thrsleep syz-fuzzer 90431 382173 76313 0 3 0x4000082 kqread syz-fuzzer 90431 103999 76313 0 3 0x4000082 thrsleep syz-fuzzer 90431 116712 76313 0 2 0x4000482 syz-fuzzer 90431 481744 76313 0 3 0x4000082 thrsleep syz-fuzzer 76313 690 47963 0 3 0x10008a pause ksh 47963 260314 63564 0 3 0x92 select sshd 28099 266381 1 0 3 0x100083 ttyin getty 63564 108031 1 0 3 0x80 select sshd 65065 159067 4415 74 3 0x100092 bpf pflogd 4415 223718 1 0 3 0x80 netio pflogd 1503 80607 80440 73 3 0x100090 kqread syslogd 80440 509298 1 0 3 0x100082 netio syslogd 58739 486726 1 77 3 0x100090 poll dhclient 20309 509347 1 0 3 0x80 poll dhclient 83575 133130 0 0 3 0x14200 bored smr 63339 46723 0 0 2 0x14200 zerothread 20392 59828 0 0 3 0x14200 aiodoned aiodoned 70942 434856 0 0 3 0x14200 syncer update 45046 25381 0 0 3 0x14200 cleaner cleaner 58428 294084 0 0 3 0x14200 reaper reaper 3651 314787 0 0 3 0x14200 pgdaemon pagedaemon 12099 223849 0 0 3 0x14200 bored crynlk 29610 262796 0 0 3 0x14200 bored crypto 9183 156815 0 0 3 0x14200 bored viomb 35453 168413 0 0 3 0x40014200 acpi0 acpi0 70838 128511 0 0 3 0x40014200 idle1 92717 16631 0 0 3 0x14200 bored softnet 11221 294776 0 0 3 0x14200 bored systqmp 3932 233066 0 0 3 0x14200 bored systq 60100 466402 0 0 3 0x40014200 bored softclock 3728 102078 0 0 3 0x40014200 idle0 1 273837 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{0}> show all locks CPU 0: exclusive mutex /syzkaller/managers/multicore/kernel/sys/dev/kcov.c:125 r = 0 (0xffffffff826f7108) #0 witness_lock+0x4b0 stacktrace_save sys/sys/stacktrace.h:36 [inline] #0 witness_lock+0x4b0 sys/kern/subr_witness.c:1164 #1 mtx_enter_try+0x100 #2 mtx_enter+0x4b sys/kern/kern_lock.c:266 #3 kcov_remote_leave+0x1f sys/dev/kcov.c:674 #4 timeout_run+0xd6 timeout_sync_leave sys/kern/kern_timeout.c:207 [inline] #4 timeout_run+0xd6 sys/kern/kern_timeout.c:676 #5 softclock_process_tick_timeout+0x196 sys/kern/kern_timeout.c:721 #6 softclock+0x11a sys/kern/kern_timeout.c:752 #7 softintr_dispatch+0xfb sys/arch/amd64/amd64/softintr.c:90 #8 Xsoftclock+0x1f #9 alltraps+0x138 shared mutex timeout r = 0 (0xffffffff826dbaa0) #0 witness_lock+0x4b0 stacktrace_save sys/sys/stacktrace.h:36 [inline] #0 witness_lock+0x4b0 sys/kern/subr_witness.c:1164 #1 timeout_run+0xb7 sys/kern/kern_timeout.c:670 #2 softclock_process_tick_timeout+0x196 sys/kern/kern_timeout.c:721 #3 softclock+0x11a sys/kern/kern_timeout.c:752 #4 softintr_dispatch+0xfb sys/arch/amd64/amd64/softintr.c:90 #5 Xsoftclock+0x1f #6 alltraps+0x138 Process 91328 (syz-executor.0) thread 0xffff800021282a58 (484591) exclusive kernel_lock &kernel_lock r = 1 (0xffffffff82903cc0) #0 witness_lock+0x4b0 stacktrace_save sys/sys/stacktrace.h:36 [inline] #0 witness_lock+0x4b0 sys/kern/subr_witness.c:1164 #1 softintr_dispatch+0x4e sys/arch/amd64/amd64/softintr.c:90 #2 Xsoftclock+0x1f #3 alltraps+0x138 exclusive mutex /syzkaller/managers/multicore/kernel/sys/dev/kcov.c:125 r = 0 (0xffffffff826f7108) #0 witness_lock+0x4b0 stacktrace_save sys/sys/stacktrace.h:36 [inline] #0 witness_lock+0x4b0 sys/kern/subr_witness.c:1164 #1 mtx_enter_try+0x100 #2 mtx_enter+0x4b sys/kern/kern_lock.c:266 #3 kcov_remote_leave+0x1f sys/dev/kcov.c:674 #4 timeout_run+0xd6 timeout_sync_leave sys/kern/kern_timeout.c:207 [inline] #4 timeout_run+0xd6 sys/kern/kern_timeout.c:676 #5 softclock_process_tick_timeout+0x196 sys/kern/kern_timeout.c:721 #6 softclock+0x11a sys/kern/kern_timeout.c:752 #7 softintr_dispatch+0xfb sys/arch/amd64/amd64/softintr.c:90 #8 Xsoftclock+0x1f #9 alltraps+0x138 shared mutex timeout r = 0 (0xffffffff826dbaa0) #0 witness_lock+0x4b0 stacktrace_save sys/sys/stacktrace.h:36 [inline] #0 witness_lock+0x4b0 sys/kern/subr_witness.c:1164 #1 timeout_run+0xb7 sys/kern/kern_timeout.c:670 #2 softclock_process_tick_timeout+0x196 sys/kern/kern_timeout.c:721 #3 softclock+0x11a sys/kern/kern_timeout.c:752 #4 softintr_dispatch+0xfb sys/arch/amd64/amd64/softintr.c:90 #5 Xsoftclock+0x1f #6 alltraps+0x138 ddb{0}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 9485 6417K 6561K 78643K 12000 0 pcb 13 8K 8K 78643K 33 0 rtable 107 3K 3K 78643K 205 0 ifaddr 44 10K 11K 78643K 49 0 counters 43 33K 34K 78643K 45 0 ioctlops 0 0K 4K 78643K 1523 0 iov 0 0K 4K 78643K 86 0 mount 1 1K 1K 78643K 1 0 vnodes 1222 77K 77K 78643K 1266 0 UFS quota 1 32K 32K 78643K 1 0 UFS mount 5 36K 36K 78643K 5 0 shm 2 1K 5K 78643K 10 0 VM map 2 1K 1K 78643K 2 0 sem 12 0K 0K 78643K 799 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1825 197K 290K 78643K 13109 0 file desc 5 13K 25K 78643K 125451 0 proc 61 63K 95K 78643K 463 0 subproc 32 2K 2K 78643K 34 0 NFS srvsock 1 0K 0K 78643K 1 0 NFS daemon 1 16K 16K 78643K 1 0 in_multi 33 2K 2K 78643K 33 0 ether_multi 1 0K 0K 78643K 1 0 ISOFS mount 1 32K 32K 78643K 1 0 MSDOSFS mount 1 16K 16K 78643K 1 0 ttys 31 148K 148K 78643K 31 0 exec 0 0K 2K 78643K 360 0 pagedep 1 8K 8K 78643K 1 0 inodedep 1 32K 32K 78643K 1 0 newblk 1 0K 0K 78643K 1 0 VM swap 7 26K 26K 78643K 7 0 UVM amap 211 39K 48K 78643K 253060 0 UVM aobj 18 2K 2K 78643K 20 0 memdesc 1 4K 4K 78643K 1 0 crypto data 1 1K 1K 78643K 1 0 NDP 6 0K 0K 78643K 11 0 temp 91 3962K 4026K 78643K 262466 0 kqueue 3 4K 8K 78643K 16 0 SYN cache 2 16K 16K 78643K 2 0 ddb{0}> show all pools Name Size Requests Fail Releases Pgreq Pgrel Npage Hiwat Minpg Maxpg Idle arp 64 6 0 0 1 0 1 1 0 8 0 plcache 128 20 0 0 1 0 1 1 0 8 0 rtpcb 120 19 0 17 1 0 1 1 0 8 0 rtentry 112 46 0 1 2 0 2 2 0 8 0 unpcb 120 419 0 409 1 0 1 1 0 8 0 syncache 296 4 0 4 1 1 0 1 0 8 0 tcpqe 32 49 0 49 2 2 0 1 0 8 0 tcpcb 736 25 0 21 1 0 1 1 0 8 0 inpcb 296 102 0 95 1 0 1 1 0 8 0 nd6 48 7 0 0 1 0 1 1 0 8 0 kcovpl 48 2 0 0 1 0 1 1 0 8 0 ppxss 1128 1 0 1 1 0 1 1 0 8 1 pffrag 232 1 0 1 1 1 0 1 0 482 0 pffrnode 88 1 0 1 1 1 0 1 0 8 0 pffrent 40 2 0 2 1 1 0 1 0 8 0 pfosfp 40 1428 0 1005 5 0 5 5 0 8 0 pfosfpen 112 1428 0 714 21 0 21 21 0 8 0 pfstitem 24 15 0 12 1 0 1 1 0 8 0 pfstkey 112 15 0 12 1 0 1 1 0 8 0 pfstate 328 15 0 12 1 0 1 1 0 8 0 pfrule 1360 25 0 20 2 1 1 2 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 189 0 0 12 0 12 12 0 8 0 art_table 32 190 0 0 2 0 2 2 0 8 0 art_node 16 45 0 4 1 0 1 1 0 8 0 sysvmsgpl 40 7 0 3 1 0 1 1 0 8 0 semupl 112 10 0 10 1 1 0 1 0 8 0 semapl 112 797 0 787 1 0 1 1 0 8 0 shmpl 112 17 0 2 1 0 1 1 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 126880 0 125475 89 1 88 89 0 8 0 ffsino 272 126880 0 125475 95 1 94 94 0 8 0 nchpl 144 252717 0 251111 60 0 60 60 0 8 0 uvmvnodes 72 5926 0 0 108 0 108 108 0 8 0 vnodes 208 5926 0 0 312 0 312 312 0 8 0 namei 1024 510230 0 510230 2 1 1 1 0 8 1 percpumem 16 33 0 1 1 0 1 1 0 8 0 scxspl 216 758193 0 758193 9 8 1 8 0 8 1 plimitpl 152 21 0 13 1 0 1 1 0 8 0 sigapl 424 125668 0 125635 4 0 4 4 0 8 0 futexpl 56 456794 0 456793 1 0 1 1 0 8 0 knotepl 112 71 0 51 1 0 1 1 0 8 0 kqueuepl 152 122088 0 122085 1 0 1 1 0 8 0 pipepl 304 232 0 221 10 8 2 2 0 8 1 fdescpl 496 125651 0 125635 3 0 3 3 0 8 0 filepl 152 253424 0 253321 6 1 5 5 0 8 1 lockfpl 104 75 0 74 1 0 1 1 0 8 0 lockfspl 48 27 0 26 1 0 1 1 0 8 0 sessionpl 144 18 0 7 1 0 1 1 0 8 0 pgrppl 48 22 0 11 1 0 1 1 0 8 0 ucredpl 96 253 0 244 1 0 1 1 0 8 0 zombiepl 144 125635 0 125634 2 1 1 1 0 8 0 processpl 1056 125668 0 125634 3 0 3 3 0 8 0 procpl 656 251788 0 251746 4 0 4 4 0 8 0 sosppl 168 2 0 2 1 1 0 1 0 8 0 sockpl 400 540 0 521 3 0 3 3 0 8 0 mcl64k 65536 17 0 0 3 0 3 3 0 8 0 mcl16k 16384 4 0 0 1 0 1 1 0 8 0 mcl12k 12288 20 0 0 2 0 2 2 0 8 0 mcl9k 9216 18 0 0 2 0 2 2 0 8 0 mcl8k 8192 17 0 0 3 0 3 3 0 8 0 mcl4k 4096 23 0 0 3 1 2 3 0 8 0 mcl2k2 2112 7 0 0 1 0 1 1 0 8 0 mcl2k 2048 327 0 0 25 12 13 25 0 8 0 mtagpl 96 3 0 0 1 0 1 1 0 8 0 mbufpl 256 1330 0 0 17 1 16 17 0 8 0 bufpl 280 128996 0 122749 447 0 447 447 0 8 0 anonpl 16 7199412 0 7169373 135 14 121 122 0 124 0 amapchunkpl 152 379789 0 379001 37 5 32 36 0 158 0 amappl16 192 298397 0 297289 58 2 56 56 0 8 0 amappl15 184 2 0 1 2 1 1 1 0 8 0 amappl14 176 62779 0 62772 1 0 1 1 0 8 0 amappl13 168 62699 0 62694 1 0 1 1 0 8 0 amappl12 160 9 0 7 3 2 1 1 0 8 0 amappl11 152 55 0 40 1 0 1 1 0 8 0 amappl10 144 12 0 8 1 0 1 1 0 8 0 amappl9 136 380 0 379 2 1 1 1 0 8 0 amappl8 128 183 0 126 2 0 2 2 0 8 0 amappl7 120 243 0 236 1 0 1 1 0 8 0 amappl6 112 64 0 55 1 0 1 1 0 8 0 amappl5 104 63161 0 63143 1 0 1 1 0 8 0 amappl4 96 63040 0 63011 1 0 1 1 0 8 0 amappl3 88 63383 0 63375 1 0 1 1 0 8 0 amappl2 80 938939 0 938871 3 0 3 3 0 8 0 amappl1 72 3468402 0 3467921 23 12 11 19 0 8 0 amappl 80 252134 0 252003 3 0 3 3 0 84 0 dma4096 4096 1 0 1 1 1 0 1 0 8 0 dma1024 1024 1 0 0 1 0 1 1 0 8 0 dma256 256 6 0 6 1 1 0 1 0 8 0 dma128 128 253 0 253 1 1 0 1 0 8 0 dma64 64 6 0 6 1 1 0 1 0 8 0 dma32 32 7 0 7 1 1 0 1 0 8 0 dma16 16 18 0 17 1 0 1 1 0 8 0 aobjpl 64 19 0 2 1 0 1 1 0 8 0 uaddrrnd 24 125651 0 125635 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 125651 0 125635 1 0 1 1 0 8 0 vmmpekpl 168 500273 0 500248 2 0 2 2 0 8 0 vmmpepl 168 15517513 0 15515092 262 151 111 163 0 357 5 vmsppl 368 125650 0 125635 2 0 2 2 0 8 0 pdppl 4096 251309 0 251270 62 21 41 45 0 8 2 pvpl 32 28991767 0 28958549 360 89 271 274 0 265 2 pmappl 232 125650 0 125635 2 1 1 2 0 8 0 extentpl 40 57 0 39 1 0 1 1 0 8 0 phpool 112 327 0 41 9 0 9 9 0 8 0 ddb{0}> machine ddbcpu 0 Invalid cpu 0 ddb{0}> trace db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:398 panic(ffffffff823d2823) at panic+0x15e sys/kern/subr_prf.c:218 witness_checkorder(ffffffff828b4938,1,0) at witness_checkorder+0x1046 sys/kern/subr_witness.c:821 rw_enter_read(ffffffff828b4928) at rw_enter_read+0x66 sys/kern/kern_rwlock.c:111 uvmfault_lookup(ffff8000212c9648,0) at uvmfault_lookup+0xd9 sys/uvm/uvm_fault.c:1495 uvm_fault_check(ffff8000212c9648,ffff8000212c95f0,ffff8000212c95d8,2) at uvm_fault_check+0x3d sys/uvm/uvm_fault.c:513 uvm_fault(ffffffff828b4920,ffff8000244d1000,0,2) at uvm_fault+0xdb sys/uvm/uvm_fault.c:694 kpageflttrap(ffff8000212c97d0,ffff8000244d1fe8) at kpageflttrap+0x202 sys/arch/amd64/amd64/trap.c:265 kerntrap(ffff8000212c97d0) at kerntrap+0xef sys/arch/amd64/amd64/trap.c:321 alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b memcpy() at memcpy+0x15 timeout_run(ffff800021283558) at timeout_run+0xd6 timeout_sync_leave sys/kern/kern_timeout.c:207 [inline] timeout_run(ffff800021283558) at timeout_run+0xd6 sys/kern/kern_timeout.c:676 softclock_process_tick_timeout(ffff800021283558,0) at softclock_process_tick_timeout+0x196 sys/kern/kern_timeout.c:721 softclock(0) at softclock+0x11a sys/kern/kern_timeout.c:752 softintr_dispatch(0) at softintr_dispatch+0xfb sys/arch/amd64/amd64/softintr.c:90 Xsoftclock() at Xsoftclock+0x1f alltraps() at alltraps+0x138 end of kernel end trace frame: 0x7f7ffffcc3b0, count: -17 ddb{0}> machine ddbcpu 1 Stopped at x86_ipi_db+0x1a: addq $0x8,%rsp x86_ipi_db(ffff800020d68ff0) at x86_ipi_db+0x1a sys/arch/amd64/amd64/db_interface.c:352 x86_ipi_handler() at x86_ipi_handler+0xb7 sys/arch/amd64/amd64/ipi.c:106 Xresume_lapic_ipi() at Xresume_lapic_ipi+0x23 __mp_lock(ffffffff82903ab8) at __mp_lock+0x122 __mp_lock_spin sys/kern/kern_lock.c:116 [inline] __mp_lock(ffffffff82903ab8) at __mp_lock+0x122 sys/kern/kern_lock.c:147 __mp_acquire_count(ffffffff82903ab8,1) at __mp_acquire_count+0x4c sys/kern/kern_lock.c:227 mi_switch() at mi_switch+0x390 sys/kern/sched_bsd.c:433 sleep_finish(ffff80002125b060,1) at sleep_finish+0x111 sys/kern/kern_synch.c:418 sleep_finish_all(ffff80002125b060,1) at sleep_finish_all+0x32 sleep_finish_timeout sys/kern/kern_synch.c:448 [inline] sleep_finish_all(ffff80002125b060,1) at sleep_finish_all+0x32 sys/kern/kern_synch.c:393 tsleep(ffffffff827ca1a0,120,ffffffff823adfc8,2) at tsleep+0x1bc sys/kern/kern_synch.c:155 sys_nanosleep(ffff8000ffff67c0,ffff80002125b190,ffff80002125b1e0) at sys_nanosleep+0x1f5 sys/kern/kern_time.c:297 syscall(ffff80002125b260) at syscall+0x4a1 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff80002125b260) at syscall+0x4a1 sys/arch/amd64/amd64/trap.c:590 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xc00004bf20, count: 3 ddb{1}> trace x86_ipi_db(ffff800020d68ff0) at x86_ipi_db+0x1a sys/arch/amd64/amd64/db_interface.c:352 x86_ipi_handler() at x86_ipi_handler+0xb7 sys/arch/amd64/amd64/ipi.c:106 Xresume_lapic_ipi() at Xresume_lapic_ipi+0x23 __mp_lock(ffffffff82903ab8) at __mp_lock+0x122 __mp_lock_spin sys/kern/kern_lock.c:116 [inline] __mp_lock(ffffffff82903ab8) at __mp_lock+0x122 sys/kern/kern_lock.c:147 __mp_acquire_count(ffffffff82903ab8,1) at __mp_acquire_count+0x4c sys/kern/kern_lock.c:227 mi_switch() at mi_switch+0x390 sys/kern/sched_bsd.c:433 sleep_finish(ffff80002125b060,1) at sleep_finish+0x111 sys/kern/kern_synch.c:418 sleep_finish_all(ffff80002125b060,1) at sleep_finish_all+0x32 sleep_finish_timeout sys/kern/kern_synch.c:448 [inline] sleep_finish_all(ffff80002125b060,1) at sleep_finish_all+0x32 sys/kern/kern_synch.c:393 tsleep(ffffffff827ca1a0,120,ffffffff823adfc8,2) at tsleep+0x1bc sys/kern/kern_synch.c:155 sys_nanosleep(ffff8000ffff67c0,ffff80002125b190,ffff80002125b1e0) at sys_nanosleep+0x1f5 sys/kern/kern_time.c:297 syscall(ffff80002125b260) at syscall+0x4a1 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff80002125b260) at syscall+0x4a1 sys/arch/amd64/amd64/trap.c:590 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xc00004bf20, count: -12