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 332642 88766 0 0x2 0x480 1 syz-executor.1 db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:398 panic(ffffffff823e230f) at panic+0x15e sys/kern/subr_prf.c:218 witness_checkorder(ffffffff8286e0f0,1,0) at witness_checkorder+0x1188 sys/kern/subr_witness.c:833 rw_enter_read(ffffffff8286e0e0) at rw_enter_read+0x66 sys/kern/kern_rwlock.c:112 uvmfault_lookup(ffff80002116f630,0) at uvmfault_lookup+0xd9 sys/uvm/uvm_fault.c:1670 uvm_fault_check(ffff80002116f630,ffff80002116f668,ffff80002116f690) at uvm_fault_check+0x3a sys/uvm/uvm_fault.c:664 uvm_fault(ffffffff8286e0d8,ffff8000232ab000,0,2) at uvm_fault+0xe2 sys/uvm/uvm_fault.c:591 kpageflttrap(ffff80002116f7c0,ffff8000232abfe8) at kpageflttrap+0x202 sys/arch/amd64/amd64/trap.c:265 kerntrap(ffff80002116f7c0) at kerntrap+0xef sys/arch/amd64/amd64/trap.c:321 alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b memcpy() at memcpy+0x15 timeout_run(ffff800021263b08) at timeout_run+0xd6 timeout_sync_leave sys/kern/kern_timeout.c:207 [inline] timeout_run(ffff800021263b08) at timeout_run+0xd6 sys/kern/kern_timeout.c:676 softclock_process_tick_timeout(ffff800021263b08,0) 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: 0xffff80002116fa00, 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(ffffffff823e230f) at panic+0x15e sys/kern/subr_prf.c:218 witness_checkorder(ffffffff8286e0f0,1,0) at witness_checkorder+0x1188 sys/kern/subr_witness.c:833 rw_enter_read(ffffffff8286e0e0) at rw_enter_read+0x66 sys/kern/kern_rwlock.c:112 uvmfault_lookup(ffff80002116f630,0) at uvmfault_lookup+0xd9 sys/uvm/uvm_fault.c:1670 uvm_fault_check(ffff80002116f630,ffff80002116f668,ffff80002116f690) at uvm_fault_check+0x3a sys/uvm/uvm_fault.c:664 uvm_fault(ffffffff8286e0d8,ffff8000232ab000,0,2) at uvm_fault+0xe2 sys/uvm/uvm_fault.c:591 kpageflttrap(ffff80002116f7c0,ffff8000232abfe8) at kpageflttrap+0x202 sys/arch/amd64/amd64/trap.c:265 kerntrap(ffff80002116f7c0) at kerntrap+0xef sys/arch/amd64/amd64/trap.c:321 alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b memcpy() at memcpy+0x15 timeout_run(ffff800021263b08) at timeout_run+0xd6 timeout_sync_leave sys/kern/kern_timeout.c:207 [inline] timeout_run(ffff800021263b08) at timeout_run+0xd6 sys/kern/kern_timeout.c:676 softclock_process_tick_timeout(ffff800021263b08,0) 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 acpicpu_idle() at acpicpu_idle+0x2eb sys/dev/acpi/acpicpu.c:1206 sched_idle(ffffffff82737ff0) at sched_idle+0x417 sys/kern/kern_sched.c:178 end trace frame: 0x0, count: -18 ddb{0}> show registers rdi 0 rsi 0x1 rbp 0xffff80002116f290 rbx 0xffff80002116f2a0 rdx 0x8b rcx 0x2 rax 0x1 r8 0xffffffff81f2d5b5 kprintf+0x145 r9 0x1 r10 0x1ad06fa6acb0d7c7 r11 0xdf3c9a55de33a740 r12 0x3000000008 r13 0xffff80002116f340 r14 0x100 r15 0x1 rip 0xffffffff81a277f8 db_enter+0x18 cs 0x8 rflags 0x246 rsp 0xffff80002116f280 ss 0x10 db_enter+0x18: addq $0x8,%rsp ddb{0}> show proc PROC (idle0) pid=402154 stat=onproc flags process=14000 proc=40000200 pri=0, usrpri=50, nice=20 forw=0x893071c3209c22bd, list=0xffff800021169500,0xffff8000211687f0 process=0xffff8000ffffee68 user=0xffff80002116a000, vmspace=0xffffffff828c6d48 estcpu=0, cpticks=16815, pctcpu=0.0 user=0, sys=0, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND 63425 307868 88766 0 3 0x80 nanoslp syz-executor.1 63425 335147 88766 0 3 0x4000080 kqread syz-executor.1 63425 466524 88766 0 3 0x4000080 fsleep syz-executor.1 88766 332642 92766 0 7 0x482 syz-executor.1 98319 199766 92766 0 2 0x482 syz-executor.0 92766 80754 83819 0 3 0x82 thrsleep syz-fuzzer 92766 158127 83819 0 3 0x4000082 thrsleep syz-fuzzer 92766 439032 83819 0 3 0x4000082 thrsleep syz-fuzzer 92766 80343 83819 0 3 0x4000082 thrsleep syz-fuzzer 92766 79627 83819 0 3 0x4000082 thrsleep syz-fuzzer 92766 472569 83819 0 3 0x4000082 thrsleep syz-fuzzer 92766 193471 83819 0 3 0x4000082 kqread syz-fuzzer 92766 455806 83819 0 3 0x4000082 thrsleep syz-fuzzer 83819 308829 54166 0 3 0x10008a sigsusp ksh 54166 287383 24281 0 3 0x92 select sshd 11141 137961 1 0 3 0x100083 ttyin getty 24281 411605 1 0 3 0x80 select sshd 62603 157776 77099 74 3 0x100092 bpf pflogd 77099 135738 1 0 3 0x80 netio pflogd 59002 487197 96268 73 3 0x100090 kqread syslogd 96268 197916 1 0 3 0x100082 netio syslogd 17648 47574 1 77 3 0x100090 poll dhclient 91433 375260 1 0 3 0x80 poll dhclient 89864 44079 0 0 3 0x14200 bored smr 82694 295703 0 0 3 0x14200 pgzero zerothread 96300 355495 0 0 3 0x14200 aiodoned aiodoned 3099 118355 0 0 3 0x14200 syncer update 26939 247948 0 0 3 0x14200 cleaner cleaner 99713 258065 0 0 3 0x14200 reaper reaper 56350 384163 0 0 3 0x14200 pgdaemon pagedaemon 73207 145744 0 0 3 0x14200 bored crynlk 9484 198017 0 0 3 0x14200 bored crypto 53264 157626 0 0 3 0x14200 bored viomb 54259 206395 0 0 3 0x40014200 acpi0 acpi0 95556 367652 0 0 3 0x40014200 idle1 40864 171476 0 0 3 0x14200 bored softnet 19459 397918 0 0 3 0x14200 bored systqmp 38191 270760 0 0 3 0x14200 bored systq 96443 274203 0 0 3 0x40014200 bored softclock *59072 402154 0 0 7 0x40014200 idle0 1 389694 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 (0xffffffff826ce8d0) #0 witness_lock+0x4b0 stacktrace_save sys/sys/stacktrace.h:36 [inline] #0 witness_lock+0x4b0 sys/kern/subr_witness.c:1182 #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 acpicpu_idle+0x2eb sys/dev/acpi/acpicpu.c:1206 #10 sched_idle+0x417 sys/kern/kern_sched.c:178 #11 proc_trampoline+0x1c shared mutex timeout r = 0 (0xffffffff82726070) #0 witness_lock+0x4b0 stacktrace_save sys/sys/stacktrace.h:36 [inline] #0 witness_lock+0x4b0 sys/kern/subr_witness.c:1182 #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 acpicpu_idle+0x2eb sys/dev/acpi/acpicpu.c:1206 #7 sched_idle+0x417 sys/kern/kern_sched.c:178 #8 proc_trampoline+0x1c Process 59072 (idle0) thread 0xffff800021169260 (402154) exclusive kernel_lock &kernel_lock r = 1 (0xffffffff828f89d8) #0 witness_lock+0x4b0 stacktrace_save sys/sys/stacktrace.h:36 [inline] #0 witness_lock+0x4b0 sys/kern/subr_witness.c:1182 #1 softintr_dispatch+0x4e sys/arch/amd64/amd64/softintr.c:90 #2 Xsoftclock+0x1f #3 acpicpu_idle+0x2eb sys/dev/acpi/acpicpu.c:1206 #4 sched_idle+0x417 sys/kern/kern_sched.c:178 #5 proc_trampoline+0x1c exclusive mutex /syzkaller/managers/multicore/kernel/sys/dev/kcov.c:125 r = 0 (0xffffffff826ce8d0) #0 witness_lock+0x4b0 stacktrace_save sys/sys/stacktrace.h:36 [inline] #0 witness_lock+0x4b0 sys/kern/subr_witness.c:1182 #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 acpicpu_idle+0x2eb sys/dev/acpi/acpicpu.c:1206 #10 sched_idle+0x417 sys/kern/kern_sched.c:178 #11 proc_trampoline+0x1c shared mutex timeout r = 0 (0xffffffff82726070) #0 witness_lock+0x4b0 stacktrace_save sys/sys/stacktrace.h:36 [inline] #0 witness_lock+0x4b0 sys/kern/subr_witness.c:1182 #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 acpicpu_idle+0x2eb sys/dev/acpi/acpicpu.c:1206 #7 sched_idle+0x417 sys/kern/kern_sched.c:178 #8 proc_trampoline+0x1c ddb{0}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 9483 6416K 6432K 78643K 10599 0 pcb 13 8K 8K 78643K 26 0 rtable 105 3K 3K 78643K 193 0 ifaddr 44 10K 10K 78643K 45 0 counters 44 34K 34K 78643K 44 0 ioctlops 0 0K 4K 78643K 1469 0 iov 0 0K 0K 78643K 4 0 mount 1 1K 1K 78643K 1 0 log 0 0K 0K 78643K 1 0 vnodes 1219 77K 77K 78643K 1231 0 UFS quota 1 32K 32K 78643K 1 0 UFS mount 5 36K 36K 78643K 5 0 shm 2 1K 1K 78643K 2 0 VM map 2 1K 1K 78643K 2 0 sem 12 0K 0K 78643K 216 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1697 195K 286K 78643K 12598 0 file desc 5 13K 25K 78643K 15230 0 sigio 0 0K 0K 78643K 2 0 proc 59 63K 95K 78643K 437 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 358 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 277 37K 38K 78643K 180189 0 UVM aobj 3 2K 2K 78643K 3 0 memdesc 1 4K 4K 78643K 1 0 crypto data 1 1K 1K 78643K 1 0 ip6_options 0 0K 0K 78643K 6 0 NDP 6 0K 0K 78643K 10 0 temp 68 3968K 4032K 78643K 32445 0 kqueue 3 4K 5K 78643K 7 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 45 0 1 2 0 2 2 0 8 0 unpcb 120 191 0 179 1 0 1 1 0 8 0 syncache 296 4 0 4 1 1 0 1 0 8 0 tcpqe 32 1025 0 1025 1 1 0 1 0 8 0 tcpcb 736 16 0 10 1 0 1 1 0 8 0 inpcb 304 10766 0 10759 3 1 2 2 0 8 1 nd6 48 6 0 0 1 0 1 1 0 8 0 kcovpl 48 2 0 0 1 0 1 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 12 0 10 1 0 1 1 0 8 0 pfstkey 112 12 0 10 1 0 1 1 0 8 0 pfstate 320 12 0 10 1 0 1 1 0 8 0 pfrule 1360 21 0 16 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 44 0 4 1 0 1 1 0 8 0 sysvmsgpl 40 11 0 3 1 0 1 1 0 8 0 semupl 112 3 0 3 2 2 0 1 0 8 0 semapl 112 213 0 203 1 0 1 1 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 16629 0 15224 88 0 88 88 0 8 0 ffsino 272 16629 0 15224 95 1 94 94 0 8 0 nchpl 144 32198 0 30588 60 0 60 60 0 8 0 uvmvnodes 72 5926 0 0 108 0 108 108 0 8 0 vnodes 224 5926 0 0 349 0 349 349 0 8 0 namei 1024 68352 0 68352 2 1 1 1 0 8 1 percpumem 16 33 0 0 1 0 1 1 0 8 0 scxspl 216 96183 0 96183 9 8 1 8 0 8 1 plimitpl 152 17 0 9 1 0 1 1 0 8 0 sigapl 424 15445 0 15413 4 0 4 4 0 8 0 futexpl 56 82258 0 82257 1 0 1 1 0 8 0 knotepl 112 68 0 48 1 0 1 1 0 8 0 kqueuepl 168 15430 0 15426 1 0 1 1 0 8 0 pipepl 336 103 0 91 5 3 2 2 0 8 1 fdescpl 496 15429 0 15413 3 0 3 3 0 8 0 filepl 152 45110 0 45002 13 8 5 5 0 8 0 lockfpl 104 64 0 63 1 0 1 1 0 8 0 lockfspl 48 25 0 24 1 0 1 1 0 8 0 sessionpl 144 18 0 7 1 0 1 1 0 8 0 pgrppl 48 18 0 7 1 0 1 1 0 8 0 ucredpl 96 2246 0 2237 1 0 1 1 0 8 0 zombiepl 144 15413 0 15412 2 1 1 1 0 8 0 processpl 1080 15445 0 15412 3 0 3 3 0 8 0 procpl 672 31492 0 31450 5 1 4 4 0 8 0 sockpl 432 10976 0 10955 6 2 4 4 0 8 1 mcl64k 65536 2 0 0 1 0 1 1 0 8 0 mcl16k 16384 1 0 0 1 0 1 1 0 8 0 mcl12k 12288 17 0 0 2 0 2 2 0 8 0 mcl9k 9216 6 0 0 1 0 1 1 0 8 0 mcl8k 8192 4 0 0 1 0 1 1 0 8 0 mcl4k 4096 12 0 0 2 0 2 2 0 8 0 mcl2k2 2112 1 0 0 1 0 1 1 0 8 0 mcl2k 2048 213 0 0 26 0 26 26 0 8 0 mtagpl 96 1 0 0 1 0 1 1 0 8 0 mbufpl 256 570 0 0 24 0 24 24 0 8 0 bufpl 280 18556 0 12292 448 0 448 448 0 8 0 anonpl 24 3782439 0 3755901 164 1 163 163 0 186 1 amapchunkpl 152 424441 0 423496 40 1 39 39 0 158 0 amappl16 200 20253 0 19430 45 1 44 44 0 8 0 amappl15 192 61 0 55 1 0 1 1 0 8 0 amappl14 184 3 0 1 1 0 1 1 0 8 0 amappl13 176 31 0 28 1 0 1 1 0 8 0 amappl12 168 47 0 37 1 0 1 1 0 8 0 amappl11 160 47 0 36 1 0 1 1 0 8 0 amappl10 152 12 0 6 1 0 1 1 0 8 0 amappl9 144 15491 0 15487 3 2 1 1 0 8 0 amappl8 136 347 0 297 2 0 2 2 0 8 0 amappl7 128 15262 0 15249 1 0 1 1 0 8 0 amappl6 120 104 0 92 1 0 1 1 0 8 0 amappl5 112 15324 0 15312 1 0 1 1 0 8 0 amappl4 104 521 0 491 1 0 1 1 0 8 0 amappl3 96 635 0 630 1 0 1 1 0 8 0 amappl2 88 431 0 385 2 0 2 2 0 8 0 amappl1 80 261426 0 261011 15 5 10 12 0 8 0 amappl 88 179141 0 178938 5 0 5 5 0 92 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 2 0 0 1 0 1 1 0 8 0 uaddrrnd 24 15429 0 15413 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 15429 0 15413 1 0 1 1 0 8 0 vmmpekpl 168 59324 0 59297 2 0 2 2 0 8 0 vmmpepl 168 1695441 0 1693295 133 34 99 128 0 357 0 vmsppl 368 15428 0 15413 2 0 2 2 0 8 0 rwobjpl 56 286461 0 284872 23 0 23 23 0 8 0 pdppl 4096 30865 0 30826 63 22 41 45 0 8 2 pvpl 32 8476999 0 8447130 270 21 249 249 0 265 5 pmappl 232 15428 0 15413 2 1 1 2 0 8 0 extentpl 40 58 0 40 1 0 1 1 0 8 0 phpool 112 332 0 30 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(ffffffff823e230f) at panic+0x15e sys/kern/subr_prf.c:218 witness_checkorder(ffffffff8286e0f0,1,0) at witness_checkorder+0x1188 sys/kern/subr_witness.c:833 rw_enter_read(ffffffff8286e0e0) at rw_enter_read+0x66 sys/kern/kern_rwlock.c:112 uvmfault_lookup(ffff80002116f630,0) at uvmfault_lookup+0xd9 sys/uvm/uvm_fault.c:1670 uvm_fault_check(ffff80002116f630,ffff80002116f668,ffff80002116f690) at uvm_fault_check+0x3a sys/uvm/uvm_fault.c:664 uvm_fault(ffffffff8286e0d8,ffff8000232ab000,0,2) at uvm_fault+0xe2 sys/uvm/uvm_fault.c:591 kpageflttrap(ffff80002116f7c0,ffff8000232abfe8) at kpageflttrap+0x202 sys/arch/amd64/amd64/trap.c:265 kerntrap(ffff80002116f7c0) at kerntrap+0xef sys/arch/amd64/amd64/trap.c:321 alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b memcpy() at memcpy+0x15 timeout_run(ffff800021263b08) at timeout_run+0xd6 timeout_sync_leave sys/kern/kern_timeout.c:207 [inline] timeout_run(ffff800021263b08) at timeout_run+0xd6 sys/kern/kern_timeout.c:676 softclock_process_tick_timeout(ffff800021263b08,0) 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 acpicpu_idle() at acpicpu_idle+0x2eb sys/dev/acpi/acpicpu.c:1206 sched_idle(ffffffff82737ff0) at sched_idle+0x417 sys/kern/kern_sched.c:178 end trace frame: 0x0, count: -18 ddb{0}> machine ddbcpu 1 Stopped at x86_ipi_db+0x1a: addq $0x8,%rsp x86_ipi_db(ffff800020d58ff0) 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(ffffffff828f87d0) at __mp_lock+0x129 __mp_lock_spin sys/kern/kern_lock.c:116 [inline] __mp_lock(ffffffff828f87d0) at __mp_lock+0x129 sys/kern/kern_lock.c:147 __mp_acquire_count(ffffffff828f87d0,1) 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(ffff8000234b8f30,1) at sleep_finish+0x281 sys/kern/kern_synch.c:433 tsleep(ffffffff828f91e0,120,ffffffff823b5c55,2) at tsleep+0x12b sys/kern/kern_synch.c:158 sys_nanosleep(ffff800021262fc8,ffff8000234b9050,ffff8000234b90a0) at sys_nanosleep+0x1f5 sys/kern/kern_time.c:297 syscall(ffff8000234b9120) at syscall+0x4a1 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff8000234b9120) at syscall+0x4a1 sys/arch/amd64/amd64/trap.c:590 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f7ffffcecd0, count: 4 ddb{1}> trace x86_ipi_db(ffff800020d58ff0) 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(ffffffff828f87d0) at __mp_lock+0x129 __mp_lock_spin sys/kern/kern_lock.c:116 [inline] __mp_lock(ffffffff828f87d0) at __mp_lock+0x129 sys/kern/kern_lock.c:147 __mp_acquire_count(ffffffff828f87d0,1) 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(ffff8000234b8f30,1) at sleep_finish+0x281 sys/kern/kern_synch.c:433 tsleep(ffffffff828f91e0,120,ffffffff823b5c55,2) at tsleep+0x12b sys/kern/kern_synch.c:158 sys_nanosleep(ffff800021262fc8,ffff8000234b9050,ffff8000234b90a0) at sys_nanosleep+0x1f5 sys/kern/kern_time.c:297 syscall(ffff8000234b9120) at syscall+0x4a1 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff8000234b9120) at syscall+0x4a1 sys/arch/amd64/amd64/trap.c:590 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f7ffffcecd0, count: -11