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 108605 71455 0 0x2 0x4000480 1 syz-fuzzer db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:398 panic(ffffffff823d20ff) at panic+0x15e sys/kern/subr_prf.c:218 witness_checkorder(ffffffff82874ca8,1,0) at witness_checkorder+0x1146 sys/kern/subr_witness.c:833 rw_enter_read(ffffffff82874c98) at rw_enter_read+0x66 sys/kern/kern_rwlock.c:111 uvmfault_lookup(ffff80002117f118,0) at uvmfault_lookup+0xd9 sys/uvm/uvm_fault.c:1540 uvm_fault_check(ffff80002117f118,ffff80002117f0e0,ffff80002117f0b8,2) at uvm_fault_check+0x3d sys/uvm/uvm_fault.c:511 uvm_fault(ffffffff82874c90,ffff8000232bd000,0,2) at uvm_fault+0xcc sys/uvm/uvm_fault.c:935 kpageflttrap(ffff80002117f290,ffff8000232bdff8) at kpageflttrap+0x202 sys/arch/amd64/amd64/trap.c:265 kerntrap(ffff80002117f290) at kerntrap+0xef sys/arch/amd64/amd64/trap.c:321 alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b memcpy() at memcpy+0x15 timeout_run(ffff80002123d2c8) at timeout_run+0xd6 timeout_sync_leave sys/kern/kern_timeout.c:207 [inline] timeout_run(ffff80002123d2c8) at timeout_run+0xd6 sys/kern/kern_timeout.c:676 softclock_process_tick_timeout(ffff80002123d2c8,0) 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: 0xffff80002117f4d0, 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(ffffffff823d20ff) at panic+0x15e sys/kern/subr_prf.c:218 witness_checkorder(ffffffff82874ca8,1,0) at witness_checkorder+0x1146 sys/kern/subr_witness.c:833 rw_enter_read(ffffffff82874c98) at rw_enter_read+0x66 sys/kern/kern_rwlock.c:111 uvmfault_lookup(ffff80002117f118,0) at uvmfault_lookup+0xd9 sys/uvm/uvm_fault.c:1540 uvm_fault_check(ffff80002117f118,ffff80002117f0e0,ffff80002117f0b8,2) at uvm_fault_check+0x3d sys/uvm/uvm_fault.c:511 uvm_fault(ffffffff82874c90,ffff8000232bd000,0,2) at uvm_fault+0xcc sys/uvm/uvm_fault.c:935 kpageflttrap(ffff80002117f290,ffff8000232bdff8) at kpageflttrap+0x202 sys/arch/amd64/amd64/trap.c:265 kerntrap(ffff80002117f290) at kerntrap+0xef sys/arch/amd64/amd64/trap.c:321 alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b memcpy() at memcpy+0x15 timeout_run(ffff80002123d2c8) at timeout_run+0xd6 timeout_sync_leave sys/kern/kern_timeout.c:207 [inline] timeout_run(ffff80002123d2c8) at timeout_run+0xd6 sys/kern/kern_timeout.c:676 softclock_process_tick_timeout(ffff80002123d2c8,0) 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(ffffffff82750ff0) 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 0xffff80002117ecf0 rbx 0xffff80002117ed00 rdx 0x8b rcx 0x2 rax 0x1 r8 0xffffffff81897ba6 kprintf+0x146 r9 0x1 r10 0x999b78ecd622cac9 r11 0x2da8dcf3199e814d r12 0x3000000008 r13 0xffff80002117eda0 r14 0x100 r15 0x1 rip 0xffffffff81b449f8 db_enter+0x18 cs 0x8 rflags 0x246 rsp 0xffff80002117ece0 ss 0x10 db_enter+0x18: addq $0x8,%rsp ddb{0}> show proc PROC (idle0) pid=278340 stat=onproc flags process=14000 proc=40000200 pri=0, usrpri=50, nice=20 forw=0xa5808de9a6f7b70c, list=0xffff8000211791f0,0xffff8000211782a0 process=0xffff8000fffff5a0 user=0xffff80002117a000, vmspace=0xffffffff8290ff60 estcpu=0, cpticks=4095, pctcpu=0.0 user=0, sys=0, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND 95645 491387 71455 0 3 0x82 nanosleep syz-executor.1 36711 120635 71455 0 2 0x482 syz-executor.0 71455 497692 64480 0 3 0x82 thrsleep syz-fuzzer 71455 368606 64480 0 3 0x4000082 nanosleep syz-fuzzer 71455 499483 64480 0 3 0x4000082 kqread syz-fuzzer 71455 99539 64480 0 3 0x4000082 thrsleep syz-fuzzer 71455 519667 64480 0 3 0x4000082 thrsleep syz-fuzzer 71455 143435 64480 0 3 0x4000082 thrsleep syz-fuzzer 71455 345736 64480 0 3 0x4000082 thrsleep syz-fuzzer 71455 108605 64480 0 7 0x4000482 syz-fuzzer 64480 340487 39433 0 3 0x10008a pause ksh 39433 241623 70507 0 3 0x92 select sshd 63167 362865 1 0 3 0x100083 ttyin getty 70507 19896 1 0 3 0x80 select sshd 7726 300802 81245 74 3 0x100092 bpf pflogd 81245 100857 1 0 3 0x80 netio pflogd 65004 309863 14275 73 3 0x100090 kqread syslogd 14275 83252 1 0 3 0x100082 netio syslogd 93691 245263 1 77 3 0x100090 poll dhclient 79315 15866 1 0 3 0x80 poll dhclient 94592 193731 0 0 3 0x14200 bored smr 72068 256446 0 0 3 0x14200 pgzero zerothread 4959 422214 0 0 3 0x14200 aiodoned aiodoned 85236 82198 0 0 3 0x14200 syncer update 39324 2257 0 0 3 0x14200 cleaner cleaner 91455 290374 0 0 3 0x14200 reaper reaper 39929 400824 0 0 3 0x14200 pgdaemon pagedaemon 66559 321708 0 0 3 0x14200 bored crynlk 23751 390154 0 0 3 0x14200 bored crypto 67359 476308 0 0 3 0x14200 bored viomb 45280 3298 0 0 3 0x40014200 acpi0 acpi0 57060 2066 0 0 3 0x40014200 idle1 62191 149757 0 0 3 0x14200 bored softnet 50074 468707 0 0 3 0x14200 bored systqmp 31855 143289 0 0 3 0x14200 bored systq 87005 40054 0 0 3 0x40014200 bored softclock *75504 278340 0 0 7 0x40014200 idle0 1 340191 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 (0xffffffff8271b4a8) #0 witness_lock+0x4b0 stacktrace_save sys/sys/stacktrace.h:36 [inline] #0 witness_lock+0x4b0 sys/kern/subr_witness.c:1176 #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 (0xffffffff8276b320) #0 witness_lock+0x4b0 stacktrace_save sys/sys/stacktrace.h:36 [inline] #0 witness_lock+0x4b0 sys/kern/subr_witness.c:1176 #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 75504 (idle0) thread 0xffff800021178000 (278340) exclusive kernel_lock &kernel_lock r = 1 (0xffffffff828c4370) #0 witness_lock+0x4b0 stacktrace_save sys/sys/stacktrace.h:36 [inline] #0 witness_lock+0x4b0 sys/kern/subr_witness.c:1176 #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 (0xffffffff8271b4a8) #0 witness_lock+0x4b0 stacktrace_save sys/sys/stacktrace.h:36 [inline] #0 witness_lock+0x4b0 sys/kern/subr_witness.c:1176 #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 (0xffffffff8276b320) #0 witness_lock+0x4b0 stacktrace_save sys/sys/stacktrace.h:36 [inline] #0 witness_lock+0x4b0 sys/kern/subr_witness.c:1176 #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 9484 6416K 6424K 78643K 10593 0 pcb 13 8K 8K 78643K 17 0 rtable 105 3K 3K 78643K 199 0 ifaddr 44 10K 10K 78643K 45 0 counters 43 33K 33K 78643K 43 0 ioctlops 0 0K 4K 78643K 1473 0 mount 1 1K 1K 78643K 1 0 vnodes 1219 77K 77K 78643K 1230 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 8 0K 1K 78643K 14 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1825 197K 290K 78643K 13109 0 file desc 5 13K 25K 78643K 988 0 sigio 0 0K 0K 78643K 4 0 proc 59 63K 95K 78643K 447 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 43 201K 201K 78643K 43 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 251 34K 34K 78643K 2928 0 UVM aobj 5 2K 2K 78643K 5 0 memdesc 1 4K 4K 78643K 1 0 crypto data 1 1K 1K 78643K 1 0 NDP 6 0K 0K 78643K 10 0 temp 70 3956K 4020K 78643K 3956 0 kqueue 3 4K 4K 78643K 3 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 29 0 19 1 0 1 1 0 8 0 syncache 296 4 0 4 1 1 0 1 0 8 0 tcpqe 32 143 0 143 2 2 0 2 0 8 0 tcpcb 736 11 0 6 1 0 1 1 0 8 0 inpcb 296 44 0 37 1 0 1 1 0 8 0 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 11 0 3 1 0 1 1 0 8 0 pfstkey 112 11 0 3 1 0 1 1 0 8 0 pfstate 328 11 0 3 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 6 0 4 1 0 1 1 0 8 0 semupl 112 5 0 5 1 1 0 1 0 8 0 semapl 112 6 0 0 1 0 1 1 0 8 0 shmpl 112 2 0 0 1 0 1 1 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 2380 0 976 88 0 88 88 0 8 0 ffsino 272 2380 0 976 95 1 94 94 0 8 0 nchpl 144 3557 0 1953 60 0 60 60 0 8 0 uvmvnodes 72 2430 0 0 45 0 45 45 0 8 0 vnodes 208 2430 0 0 128 0 128 128 0 8 0 namei 1024 8255 0 8255 2 1 1 1 0 8 1 percpumem 16 32 0 0 1 0 1 1 0 8 0 scxspl 216 10772 0 10772 9 8 1 8 0 8 1 plimitpl 152 15 0 7 1 0 1 1 0 8 0 sigapl 424 1204 0 1172 4 0 4 4 0 8 0 futexpl 56 4176 0 4176 1 0 1 1 0 8 1 knotepl 112 62 0 42 1 0 1 1 0 8 0 kqueuepl 152 943 0 941 1 0 1 1 0 8 0 pipepl 304 76 0 65 1 0 1 1 0 8 0 fdescpl 496 1188 0 1172 3 0 3 3 0 8 0 filepl 152 3140 0 3036 6 1 5 5 0 8 0 lockfpl 104 40 0 39 1 0 1 1 0 8 0 lockfspl 48 15 0 14 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 96 125 0 116 1 0 1 1 0 8 0 zombiepl 144 1173 0 1171 2 1 1 1 0 8 0 processpl 1056 1204 0 1171 3 0 3 3 0 8 0 procpl 656 2233 0 2193 4 0 4 4 0 8 0 sockpl 400 92 0 73 4 2 2 3 0 8 0 mcl12k 12288 2 0 0 1 0 1 1 0 8 0 mcl4k 4096 5 0 0 1 0 1 1 0 8 0 mcl2k 2048 343 0 0 42 0 42 42 0 8 0 mtagpl 96 1 0 0 1 0 1 1 0 8 0 mbufpl 256 344 0 0 21 0 21 21 0 8 0 bufpl 280 4453 0 181 306 0 306 306 0 8 0 anonpl 16 116386 0 79021 155 1 154 154 0 124 0 amapchunkpl 152 5412 0 4196 54 2 52 53 0 158 0 amappl16 192 3617 0 2437 60 0 60 60 0 8 0 amappl15 184 3 0 0 1 0 1 1 0 8 0 amappl14 176 26 0 19 1 0 1 1 0 8 0 amappl13 168 29 0 26 1 0 1 1 0 8 0 amappl12 160 12 0 9 1 0 1 1 0 8 0 amappl11 152 58 0 42 1 0 1 1 0 8 0 amappl10 144 498 0 494 1 0 1 1 0 8 0 amappl9 136 852 0 850 2 1 1 1 0 8 0 amappl8 128 139 0 107 2 0 2 2 0 8 0 amappl7 120 721 0 711 1 0 1 1 0 8 0 amappl6 112 547 0 533 1 0 1 1 0 8 0 amappl5 104 1330 0 1311 1 0 1 1 0 8 0 amappl4 96 290 0 265 1 0 1 1 0 8 0 amappl3 88 127 0 118 1 0 1 1 0 8 0 amappl2 80 7658 0 7594 2 0 2 2 0 8 0 amappl1 72 41443 0 40968 25 15 10 19 0 8 0 amappl 80 2667 0 2458 5 0 5 5 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 4 0 0 1 0 1 1 0 8 0 uaddrrnd 24 1188 0 1172 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 1188 0 1172 1 0 1 1 0 8 0 vmmpekpl 168 9143 0 9114 2 0 2 2 0 8 0 vmmpepl 168 152972 0 150447 163 16 147 160 0 357 34 vmsppl 368 1187 0 1172 2 0 2 2 0 8 0 pdppl 4096 2383 0 2344 64 23 41 45 0 8 2 pvpl 32 442157 0 401349 339 1 338 339 0 265 3 pmappl 232 1187 0 1172 2 1 1 2 0 8 0 extentpl 40 57 0 39 1 0 1 1 0 8 0 phpool 112 341 0 30 10 0 10 10 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(ffffffff823d20ff) at panic+0x15e sys/kern/subr_prf.c:218 witness_checkorder(ffffffff82874ca8,1,0) at witness_checkorder+0x1146 sys/kern/subr_witness.c:833 rw_enter_read(ffffffff82874c98) at rw_enter_read+0x66 sys/kern/kern_rwlock.c:111 uvmfault_lookup(ffff80002117f118,0) at uvmfault_lookup+0xd9 sys/uvm/uvm_fault.c:1540 uvm_fault_check(ffff80002117f118,ffff80002117f0e0,ffff80002117f0b8,2) at uvm_fault_check+0x3d sys/uvm/uvm_fault.c:511 uvm_fault(ffffffff82874c90,ffff8000232bd000,0,2) at uvm_fault+0xcc sys/uvm/uvm_fault.c:935 kpageflttrap(ffff80002117f290,ffff8000232bdff8) at kpageflttrap+0x202 sys/arch/amd64/amd64/trap.c:265 kerntrap(ffff80002117f290) at kerntrap+0xef sys/arch/amd64/amd64/trap.c:321 alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b memcpy() at memcpy+0x15 timeout_run(ffff80002123d2c8) at timeout_run+0xd6 timeout_sync_leave sys/kern/kern_timeout.c:207 [inline] timeout_run(ffff80002123d2c8) at timeout_run+0xd6 sys/kern/kern_timeout.c:676 softclock_process_tick_timeout(ffff80002123d2c8,0) 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(ffffffff82750ff0) 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(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 __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x5f sys/dev/kcov.c:149 __mp_acquire_count(ffffffff828c4168,1) 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(ffff800021272f20,1) at sleep_finish+0x111 sys/kern/kern_synch.c:418 sleep_finish_all(ffff800021272f20,1) at sleep_finish_all+0x32 sleep_finish_timeout sys/kern/kern_synch.c:448 [inline] sleep_finish_all(ffff800021272f20,1) at sleep_finish_all+0x32 sys/kern/kern_synch.c:393 tsleep(ffffffff82777338,120,ffffffff823acdf5,2) at tsleep+0x1bc sys/kern/kern_synch.c:155 sys_nanosleep(ffff80002123cf78,ffff800021273050,ffff8000212730a0) at sys_nanosleep+0x1f5 sys/kern/kern_time.c:297 syscall(ffff800021273120) at syscall+0x4a1 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff800021273120) at syscall+0x4a1 sys/arch/amd64/amd64/trap.c:590 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xc00004bde0, 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 __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x5f sys/dev/kcov.c:149 __mp_acquire_count(ffffffff828c4168,1) 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(ffff800021272f20,1) at sleep_finish+0x111 sys/kern/kern_synch.c:418 sleep_finish_all(ffff800021272f20,1) at sleep_finish_all+0x32 sleep_finish_timeout sys/kern/kern_synch.c:448 [inline] sleep_finish_all(ffff800021272f20,1) at sleep_finish_all+0x32 sys/kern/kern_synch.c:393 tsleep(ffffffff82777338,120,ffffffff823acdf5,2) at tsleep+0x1bc sys/kern/kern_synch.c:155 sys_nanosleep(ffff80002123cf78,ffff800021273050,ffff8000212730a0) at sys_nanosleep+0x1f5 sys/kern/kern_time.c:297 syscall(ffff800021273120) at syscall+0x4a1 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff800021273120) at syscall+0x4a1 sys/arch/amd64/amd64/trap.c:590 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xc00004bde0, count: -12