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 87120 30027 0 0x14000 0x200 1 reaper db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:398 panic(ffffffff823e78c0) at panic+0x15e sys/kern/subr_prf.c:218 witness_checkorder(ffffffff827fe8d0,1,0) at witness_checkorder+0x1188 sys/kern/subr_witness.c:833 rw_enter_read(ffffffff827fe8c0) at rw_enter_read+0x66 sys/kern/kern_rwlock.c:112 uvmfault_lookup(ffff80002116edb0,0) at uvmfault_lookup+0xd9 sys/uvm/uvm_fault.c:1701 uvm_fault_check(ffff80002116edb0,ffff80002116ede8,ffff80002116ee10) at uvm_fault_check+0x3a sys/uvm/uvm_fault.c:674 uvm_fault(ffffffff827fe8b8,ffff8000232af000,0,2) at uvm_fault+0xe2 sys/uvm/uvm_fault.c:601 kpageflttrap(ffff80002116ef40,ffff8000232affe0) at kpageflttrap+0x202 sys/arch/amd64/amd64/trap.c:265 kerntrap(ffff80002116ef40) at kerntrap+0xef sys/arch/amd64/amd64/trap.c:321 alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b memcpy() at memcpy+0x15 timeout_run(ffff800021263868) at timeout_run+0xd6 timeout_sync_leave sys/kern/kern_timeout.c:207 [inline] timeout_run(ffff800021263868) at timeout_run+0xd6 sys/kern/kern_timeout.c:676 softclock_process_tick_timeout(ffff800021263868,0) 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: 0xffff80002116f180, 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(ffffffff823e78c0) at panic+0x15e sys/kern/subr_prf.c:218 witness_checkorder(ffffffff827fe8d0,1,0) at witness_checkorder+0x1188 sys/kern/subr_witness.c:833 rw_enter_read(ffffffff827fe8c0) at rw_enter_read+0x66 sys/kern/kern_rwlock.c:112 uvmfault_lookup(ffff80002116edb0,0) at uvmfault_lookup+0xd9 sys/uvm/uvm_fault.c:1701 uvm_fault_check(ffff80002116edb0,ffff80002116ede8,ffff80002116ee10) at uvm_fault_check+0x3a sys/uvm/uvm_fault.c:674 uvm_fault(ffffffff827fe8b8,ffff8000232af000,0,2) at uvm_fault+0xe2 sys/uvm/uvm_fault.c:601 kpageflttrap(ffff80002116ef40,ffff8000232affe0) at kpageflttrap+0x202 sys/arch/amd64/amd64/trap.c:265 kerntrap(ffff80002116ef40) at kerntrap+0xef sys/arch/amd64/amd64/trap.c:321 alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b memcpy() at memcpy+0x15 timeout_run(ffff800021263868) at timeout_run+0xd6 timeout_sync_leave sys/kern/kern_timeout.c:207 [inline] timeout_run(ffff800021263868) at timeout_run+0xd6 sys/kern/kern_timeout.c:676 softclock_process_tick_timeout(ffff800021263868,0) 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(ffffffff8274bff0) 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 0xffff80002116ea10 rbx 0xffff80002116ea20 rdx 0x8b rcx 0x2 rax 0x1 r8 0xffffffff81fea4a5 kprintf+0x145 r9 0x1 r10 0x59018cf6dc66fe54 r11 0xcaa5853ade55025e r12 0x3000000008 r13 0xffff80002116eac0 r14 0x100 r15 0x1 rip 0xffffffff8176bbc8 db_enter+0x18 cs 0x8 rflags 0x246 rsp 0xffff80002116ea00 ss 0x10 db_enter+0x18: addq $0x8,%rsp ddb{0}> show proc PROC (idle0) pid=295287 stat=onproc flags process=14000 proc=40000200 pri=0, usrpri=50, nice=20 forw=0x4874c101874ab361, list=0xffff800021169ce0,0xffff800021168a90 process=0xffff8000ffffea30 user=0xffff80002116a000, vmspace=0xffffffff8294cc08 estcpu=0, cpticks=22471, pctcpu=0.0 user=0, sys=0, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND 47506 31741 49037 0 3 0x82 nanoslp syz-executor.1 67573 178365 49037 0 2 0x482 syz-executor.0 49037 296881 93748 0 3 0x82 kqread syz-fuzzer 49037 189915 93748 0 3 0x4000082 thrsleep syz-fuzzer 49037 206897 93748 0 3 0x4000082 thrsleep syz-fuzzer 49037 103283 93748 0 3 0x4000082 thrsleep syz-fuzzer 49037 523646 93748 0 3 0x4000082 thrsleep syz-fuzzer 49037 516799 93748 0 3 0x4000082 thrsleep syz-fuzzer 49037 68557 93748 0 3 0x4000082 thrsleep syz-fuzzer 49037 151006 93748 0 3 0x4000082 thrsleep syz-fuzzer 93748 288606 42864 0 3 0x10008a sigsusp ksh 42864 446668 43715 0 3 0x92 select sshd 28530 59153 1 0 3 0x100083 ttyin getty 43715 159203 1 0 3 0x80 select sshd 5405 19762 61274 74 3 0x100092 bpf pflogd 61274 352360 1 0 3 0x80 netio pflogd 39345 41784 98444 73 3 0x100090 kqread syslogd 98444 363179 1 0 3 0x100082 netio syslogd 38738 220255 1 77 3 0x100090 poll dhclient 34568 161309 1 0 3 0x80 poll dhclient 84988 150950 0 0 3 0x14200 bored smr 58869 44915 0 0 3 0x14200 pgzero zerothread 12584 425142 0 0 3 0x14200 aiodoned aiodoned 37088 5608 0 0 3 0x14200 syncer update 8701 229485 0 0 3 0x14200 cleaner cleaner 30027 87120 0 0 7 0x14200 reaper 85813 118794 0 0 3 0x14200 pgdaemon pagedaemon 46030 157310 0 0 3 0x14200 bored crynlk 26892 311524 0 0 3 0x14200 bored crypto 41907 65704 0 0 3 0x14200 bored viomb 15313 451841 0 0 3 0x40014200 acpi0 acpi0 27014 50493 0 0 3 0x40014200 idle1 48372 273318 0 0 2 0x14200 softnet 47711 488180 0 0 2 0x14200 systqmp 3645 264723 0 0 3 0x14200 bored systq 30339 480524 0 0 3 0x40014200 bored softclock *34260 295287 0 0 7 0x40014200 idle0 1 248428 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 (0xffffffff82773060) #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 (0xffffffff82733ca0) #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 34260 (idle0) thread 0xffff800021169a40 (295287) exclusive kernel_lock &kernel_lock r = 1 (0xffffffff82802250) #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 (0xffffffff82773060) #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 (0xffffffff82733ca0) #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 9498 6484K 6621K 78643K 10745 0 pcb 13 8K 8K 78643K 17 0 rtable 105 3K 3K 78643K 197 0 ifaddr 49 11K 11K 78643K 50 0 counters 44 34K 34K 78643K 44 0 ioctlops 0 0K 4K 78643K 1469 0 iov 0 0K 2K 78643K 1768 0 mount 1 1K 1K 78643K 1 0 log 0 0K 0K 78643K 1 0 vnodes 1218 77K 77K 78643K 1248 0 UFS quota 1 32K 32K 78643K 1 0 UFS mount 5 36K 36K 78643K 5 0 shm 2 1K 5K 78643K 4 0 VM map 2 1K 1K 78643K 2 0 sem 10 0K 0K 78643K 12 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1697 195K 286K 78643K 12598 0 file desc 4 9K 25K 78643K 25550 0 proc 60 63K 95K 78643K 438 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 270 38K 39K 78643K 299567 0 UVM aobj 11 6K 6K 78643K 11 0 memdesc 1 4K 4K 78643K 1 0 crypto data 1 1K 1K 78643K 1 0 NDP 7 0K 0K 78643K 11 0 temp 72 3968K 4032K 78643K 53113 0 kqueue 3 4K 5K 78643K 5 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 25 0 23 1 0 1 1 0 8 0 rtentry 112 45 0 1 2 0 2 2 0 8 0 unpcb 120 190 0 180 1 0 1 1 0 8 0 syncache 296 4 0 4 1 1 0 1 0 8 0 tcpqe 32 774 0 774 1 1 0 1 0 8 0 tcpcb 736 10 0 6 1 0 1 1 0 8 0 inpcb 304 58 0 52 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 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 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 256 188 0 0 12 0 12 12 0 8 0 art_table 32 189 0 0 2 0 2 2 0 8 0 art_node 16 44 0 4 1 0 1 1 0 8 0 sysvmsgpl 40 2 0 0 1 0 1 1 0 8 0 semupl 112 1 0 1 1 0 1 1 0 8 1 semapl 112 8 0 0 1 0 1 1 0 8 0 shmpl 112 8 0 0 1 0 1 1 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 26946 0 25541 88 0 88 88 0 8 0 ffsino 272 26946 0 25541 95 1 94 94 0 8 0 nchpl 144 52692 0 51084 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 106642 0 106642 2 1 1 1 0 8 1 percpumem 16 33 0 0 1 0 1 1 0 8 0 scxspl 216 158116 0 158116 9 8 1 8 0 8 1 plimitpl 152 19 0 11 1 0 1 1 0 8 0 sigapl 424 25765 0 25734 4 0 4 4 0 8 0 futexpl 56 93994 0 93994 1 0 1 1 0 8 1 knotepl 112 64 0 44 1 0 1 1 0 8 0 kqueuepl 168 24717 0 24715 1 0 1 1 0 8 0 pipepl 336 145 0 134 4 2 2 2 0 8 1 fdescpl 496 25749 0 25734 3 0 3 3 0 8 0 filepl 152 51933 0 51832 8 3 5 5 0 8 1 lockfpl 104 9 0 8 1 0 1 1 0 8 0 lockfspl 48 5 0 4 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 65 0 56 1 0 1 1 0 8 0 zombiepl 144 25734 0 25732 2 1 1 1 0 8 0 processpl 1080 25765 0 25732 3 0 3 3 0 8 0 procpl 672 52440 0 52399 5 1 4 4 0 8 0 sockpl 432 273 0 255 3 0 3 3 0 8 0 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 34 0 0 2 0 2 2 0 8 0 mcl9k 9216 25 0 0 2 0 2 2 0 8 0 mcl8k 8192 12 0 0 2 0 2 2 0 8 0 mcl4k 4096 18 0 0 3 1 2 3 0 8 0 mcl2k2 2112 1 0 0 1 0 1 1 0 8 0 mcl2k 2048 236 0 0 23 0 23 23 0 8 0 mtagpl 96 1 0 0 1 0 1 1 0 8 0 mbufpl 256 516 0 0 20 2 18 19 0 8 0 bufpl 280 28880 0 22614 448 0 448 448 0 8 0 anonpl 24 6290364 0 6263853 170 6 164 164 0 186 1 amapchunkpl 152 708367 0 707416 47 7 40 40 0 158 1 amappl16 200 44787 0 43967 45 1 44 44 0 8 0 amappl15 192 60 0 54 1 0 1 1 0 8 0 amappl14 184 12774 0 12770 1 0 1 1 0 8 0 amappl13 176 26 0 25 1 0 1 1 0 8 0 amappl12 168 35 0 27 1 0 1 1 0 8 0 amappl11 160 57 0 43 1 0 1 1 0 8 0 amappl10 152 24 0 13 1 0 1 1 0 8 0 amappl9 144 286 0 286 2 2 0 1 0 8 0 amappl8 136 372 0 316 2 0 2 2 0 8 0 amappl7 128 61 0 51 1 0 1 1 0 8 0 amappl6 120 104 0 89 1 0 1 1 0 8 0 amappl5 112 12889 0 12878 1 0 1 1 0 8 0 amappl4 104 13279 0 13251 1 0 1 1 0 8 0 amappl3 96 4418 0 4413 1 0 1 1 0 8 0 amappl2 88 13230 0 13184 2 0 2 2 0 8 0 amappl1 80 421828 0 421430 15 5 10 12 0 8 1 amappl 88 299260 0 299072 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 10 0 0 1 0 1 1 0 8 0 uaddrrnd 24 25749 0 25734 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 25749 0 25734 1 0 1 1 0 8 0 vmmpekpl 168 101696 0 101668 2 0 2 2 0 8 0 vmmpepl 168 2821677 0 2819631 127 27 100 124 0 357 2 vmsppl 368 25748 0 25733 2 0 2 2 0 8 0 rwobjpl 56 464937 0 463366 23 0 23 23 0 8 0 pdppl 4096 51505 0 51466 63 22 41 45 0 8 2 pvpl 32 10356002 0 10326296 268 21 247 249 0 265 2 pmappl 232 25748 0 25733 2 1 1 2 0 8 0 extentpl 40 58 0 40 1 0 1 1 0 8 0 phpool 112 326 0 32 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(ffffffff823e78c0) at panic+0x15e sys/kern/subr_prf.c:218 witness_checkorder(ffffffff827fe8d0,1,0) at witness_checkorder+0x1188 sys/kern/subr_witness.c:833 rw_enter_read(ffffffff827fe8c0) at rw_enter_read+0x66 sys/kern/kern_rwlock.c:112 uvmfault_lookup(ffff80002116edb0,0) at uvmfault_lookup+0xd9 sys/uvm/uvm_fault.c:1701 uvm_fault_check(ffff80002116edb0,ffff80002116ede8,ffff80002116ee10) at uvm_fault_check+0x3a sys/uvm/uvm_fault.c:674 uvm_fault(ffffffff827fe8b8,ffff8000232af000,0,2) at uvm_fault+0xe2 sys/uvm/uvm_fault.c:601 kpageflttrap(ffff80002116ef40,ffff8000232affe0) at kpageflttrap+0x202 sys/arch/amd64/amd64/trap.c:265 kerntrap(ffff80002116ef40) at kerntrap+0xef sys/arch/amd64/amd64/trap.c:321 alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b memcpy() at memcpy+0x15 timeout_run(ffff800021263868) at timeout_run+0xd6 timeout_sync_leave sys/kern/kern_timeout.c:207 [inline] timeout_run(ffff800021263868) at timeout_run+0xd6 sys/kern/kern_timeout.c:676 softclock_process_tick_timeout(ffff800021263868,0) 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(ffffffff8274bff0) 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 __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x44 sys/dev/kcov.c:149 uvm_map_teardown(fffffd807effa450) at uvm_map_teardown+0x267 sys/uvm/uvm_map.c:2763 uvmspace_free(fffffd807effa450) at uvmspace_free+0xa6 sys/uvm/uvm_map.c:3655 reaper(ffff8000211b3268) at reaper+0x189 sys/kern/kern_exit.c:462 end trace frame: 0x0, count: 8 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 __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x44 sys/dev/kcov.c:149 uvm_map_teardown(fffffd807effa450) at uvm_map_teardown+0x267 sys/uvm/uvm_map.c:2763 uvmspace_free(fffffd807effa450) at uvmspace_free+0xa6 sys/uvm/uvm_map.c:3655 reaper(ffff8000211b3268) at reaper+0x189 sys/kern/kern_exit.c:462 end trace frame: 0x0, count: -7