uvm_fault(0xfffffd8075f793c0, 0x4d00000056, 0, 1) -> e kernel: page fault trap, code=0 Stopped at witness_checkorder+0x1ec: movl 0x8(%r14),%ebx TID PID UID PRFLAGS PFLAGS CPU COMMAND 73186 85180 0 0x14000 0x200 1 reaper witness_checkorder(fffffd806ef6fcb8,9,0) at witness_checkorder+0x1ec sys/kern/subr_witness.c:794 mtx_enter(fffffd806ef6fca8) at mtx_enter+0x3e sys/kern/kern_lock.c:265 knote_remove(ffff800021284000,fffffd806ef6fca8,fffffd806ef6fd30,3,0) at knote_remove+0x20d sys/kern/kern_event.c:1881 knote_fdclose(ffff800021284000,3) at knote_fdclose+0xae sys/kern/kern_event.c:1934 fdfree(ffff800021284000) at fdfree+0xdf sys/kern/kern_descrip.c:1196 exit1(ffff800021284000,0,0,1) at exit1+0x3e4 sys/kern/kern_exit.c:206 sys_exit(ffff800021284000,ffff800022d71a30,ffff800022d71a80) at sys_exit+0x1a sys/kern/kern_exit.c:89 syscall(ffff800022d71b00) at syscall+0x5e2 mi_syscall sys/sys/syscall_mi.h:110 [inline] syscall(ffff800022d71b00) at syscall+0x5e2 sys/arch/amd64/amd64/trap.c:623 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x774a05adca60, count: 6 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 *cpu0: uvm_fault(0xfffffd8075f793c0, 0x4d00000056, 0, 1) -> e ddb{0}> trace witness_checkorder(fffffd806ef6fcb8,9,0) at witness_checkorder+0x1ec sys/kern/subr_witness.c:794 mtx_enter(fffffd806ef6fca8) at mtx_enter+0x3e sys/kern/kern_lock.c:265 knote_remove(ffff800021284000,fffffd806ef6fca8,fffffd806ef6fd30,3,0) at knote_remove+0x20d sys/kern/kern_event.c:1881 knote_fdclose(ffff800021284000,3) at knote_fdclose+0xae sys/kern/kern_event.c:1934 fdfree(ffff800021284000) at fdfree+0xdf sys/kern/kern_descrip.c:1196 exit1(ffff800021284000,0,0,1) at exit1+0x3e4 sys/kern/kern_exit.c:206 sys_exit(ffff800021284000,ffff800022d71a30,ffff800022d71a80) at sys_exit+0x1a sys/kern/kern_exit.c:89 syscall(ffff800022d71b00) at syscall+0x5e2 mi_syscall sys/sys/syscall_mi.h:110 [inline] syscall(ffff800022d71b00) at syscall+0x5e2 sys/arch/amd64/amd64/trap.c:623 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x774a05adca60, count: -9 ddb{0}> show registers rdi 0 rsi 0x20000 acpi_pdirpa+0xbe63 rbp 0xffff800022d717d0 rbx 0xe rdx 0 rcx 0xffff800021284000 rax 0xffffffff82b79ff0 cpu_info_full_primary+0x1ff0 r8 0x1 r9 0 r10 0x90b27b3726fa30 r11 0x79782af39c85380e r12 0 r13 0xfffffd806ef6fcb8 r14 0x4d0000004e r15 0xffff800021284000 rip 0xffffffff81009f9c witness_checkorder+0x1ec cs 0x8 rflags 0x10246 __ALIGN_SIZE+0xf246 rsp 0xffff800022d71720 ss 0x10 witness_checkorder+0x1ec: movl 0x8(%r14),%ebx ddb{0}> show proc PROC (syz-executor.7) pid=339011 stat=onproc flags process=1008 proc=2000 pri=0, usrpri=80, nice=20 forw=0xffffffffffffffff, list=0xffff8000212f82b8,0xffff800021224d60 process=0xffff80002128c018 user=0xffff800022d6c000, vmspace=0xfffffd8075f793c0 estcpu=36, cpticks=0, pctcpu=0.0 user=0, sys=0, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND 45972 221879 50146 0 2 0 syz-executor.4 45972 51123 50146 0 2 0x4000000 syz-executor.4 99703 522260 51056 0 2 0 syz-executor.3 99703 199610 51056 0 3 0x4000080 fsleep syz-executor.3 54777 166068 96071 0 2 0x2 syz-executor.2 36231 100533 0 0 3 0x14200 bored sosplice 58181 218330 96071 0 2 0x2 syz-executor.6 61286 25874 96071 0 3 0x82 nanoslp syz-executor.7 82723 199499 96071 0 2 0x482 syz-executor.5 50146 512123 96071 0 2 0x482 syz-executor.4 96906 223572 96071 0 2 0x2 syz-executor.1 51056 403390 96071 0 3 0x82 nanoslp syz-executor.3 71081 162852 96071 0 2 0x2 syz-executor.0 96071 132486 62070 0 3 0x2000082 thrsleep syz-fuzzer 96071 184602 62070 0 2 0x6000482 syz-fuzzer 96071 229698 62070 0 3 0x6000082 wait syz-fuzzer 96071 426649 62070 0 3 0x6000082 thrsleep syz-fuzzer 96071 147857 62070 0 3 0x6000082 wait syz-fuzzer 96071 67986 62070 0 3 0x6000082 wait syz-fuzzer 96071 346134 62070 0 3 0x6000082 wait syz-fuzzer 96071 244269 62070 0 3 0x6000082 wait syz-fuzzer 96071 93580 62070 0 3 0x6000082 wait syz-fuzzer 96071 283354 62070 0 3 0x6000082 thrsleep syz-fuzzer 96071 209760 62070 0 3 0x6000082 thrsleep syz-fuzzer 96071 459923 62070 0 3 0x6000082 wait syz-fuzzer 96071 28876 62070 0 3 0x6000082 wait syz-fuzzer 96071 199549 62070 0 3 0x6000082 kqread syz-fuzzer 96071 253175 62070 0 3 0x6000082 thrsleep syz-fuzzer 62070 218880 31111 0 3 0x10008a sigsusp ksh 31111 256979 36374 0 3 0x9a kqread sshd 41917 133291 1 0 3 0x100083 ttyin getty 36374 342295 1 0 3 0x88 kqread sshd 34834 309803 58871 74 3 0x1100092 bpf pflogd 58871 366645 1 0 3 0x80 netio pflogd 40940 5091 15531 73 3 0x1100090 kqread syslogd 15531 169559 1 0 3 0x100082 netio syslogd 90410 13079 1 0 3 0x100080 kqread resolvd 6792 385650 59164 77 3 0x100092 kqread dhcpleased 18595 116150 59164 77 3 0x100092 kqread dhcpleased 59164 91430 1 0 3 0x80 kqread dhcpleased 7603 188245 0 0 3 0x14200 bored smr 68749 224582 0 0 2 0x14200 zerothread 25230 59342 0 0 3 0x14200 aiodoned aiodoned 17900 104147 0 0 3 0x14200 syncer update 44603 331981 0 0 3 0x14200 cleaner cleaner 85180 73186 0 0 7 0x14200 reaper 64155 160731 0 0 3 0x14200 pgdaemon pagedaemon 41346 78300 0 0 3 0x14200 bored viomb 11771 507771 0 0 3 0x40014200 acpi0 acpi0 68690 190275 0 0 3 0x40014200 idle1 13889 232859 0 0 3 0x14200 bored softnet3 14486 370026 0 0 3 0x14200 bored softnet2 73759 424563 0 0 3 0x14200 bored softnet1 58910 399516 0 0 3 0x14200 bored softnet0 78001 213469 0 0 3 0x14200 bored systqmp 15309 442287 0 0 3 0x14200 bored systq 19738 219131 0 0 2 0x40014200 softclock 85291 245056 0 0 3 0x40014200 idle0 1 219758 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{0}> show all locks Process 54777 (syz-executor.2) thread 0xffff8000212f82b8 (166068) exclusive rrwlock inode r = 0 (0xfffffd806572dd60) #0 witness_lock+0x447 #1 rw_enter+0x3c8 sys/kern/kern_rwlock.c:309 #2 rrw_enter+0x8c sys/kern/kern_rwlock.c:464 #3 VOP_LOCK+0x8b sys/kern/vfs_vops.c:518 #4 vn_lock+0x84 sys/kern/vfs_vnops.c:564 #5 vget+0x200 sys/kern/vfs_subr.c:676 #6 ufs_ihashget+0x121 sys/ufs/ufs/ufs_ihash.c:119 #7 ffs_vget+0x7c sys/ufs/ffs/ffs_vfsops.c:1314 #8 ufs_lookup+0x13ba sys/ufs/ufs/ufs_lookup.c:487 #9 VOP_LOOKUP+0x5c sys/kern/vfs_vops.c:85 #10 vfs_lookup+0x6e2 sys/kern/vfs_lookup.c:566 #11 namei+0x55a sys/kern/vfs_lookup.c:250 #12 dounlinkat+0x9d sys/kern/vfs_syscalls.c:1847 #13 syscall+0x5e2 mi_syscall sys/sys/syscall_mi.h:110 [inline] #13 syscall+0x5e2 sys/arch/amd64/amd64/trap.c:623 #14 Xsyscall+0x128 exclusive rrwlock inode r = 0 (0xfffffd806572d920) #0 witness_lock+0x447 #1 rw_enter+0x3c8 sys/kern/kern_rwlock.c:309 #2 rrw_enter+0x8c sys/kern/kern_rwlock.c:464 #3 VOP_LOCK+0x8b sys/kern/vfs_vops.c:518 #4 vn_lock+0x84 sys/kern/vfs_vnops.c:564 #5 vfs_lookup+0xd5 sys/kern/vfs_lookup.c:418 #6 namei+0x55a sys/kern/vfs_lookup.c:250 #7 dounlinkat+0x9d sys/kern/vfs_syscalls.c:1847 #8 syscall+0x5e2 mi_syscall sys/sys/syscall_mi.h:110 [inline] #8 syscall+0x5e2 sys/arch/amd64/amd64/trap.c:623 #9 Xsyscall+0x128 Process 96906 (syz-executor.1) thread 0xffff80002121b808 (223572) exclusive rrwlock inode r = 0 (0xfffffd806572db40) #0 witness_lock+0x447 #1 rw_enter+0x3c8 sys/kern/kern_rwlock.c:309 #2 rrw_enter+0x8c sys/kern/kern_rwlock.c:464 #3 VOP_LOCK+0x8b sys/kern/vfs_vops.c:518 #4 vn_lock+0x84 sys/kern/vfs_vnops.c:564 #5 vn_closefile+0xca vn_close sys/kern/vfs_vnops.c:292 [inline] #5 vn_closefile+0xca sys/kern/vfs_vnops.c:609 #6 fdrop+0xcb sys/kern/kern_descrip.c:1274 #7 closef+0x120 sys/kern/kern_descrip.c:1258 #8 syscall+0x606 mi_syscall sys/sys/syscall_mi.h:110 [inline] #8 syscall+0x606 sys/arch/amd64/amd64/trap.c:623 #9 Xsyscall+0x128 Process 71081 (syz-executor.0) thread 0xffff80002121a570 (162852) exclusive rrwlock inode r = 0 (0xfffffd8066ea3e78) #0 witness_lock+0x447 #1 rw_enter+0x3c8 sys/kern/kern_rwlock.c:309 #2 rrw_enter+0x8c sys/kern/kern_rwlock.c:464 #3 VOP_LOCK+0x8b sys/kern/vfs_vops.c:518 #4 ufs_ihashins+0x46 sys/ufs/ufs/ufs_ihash.c:140 #5 ffs_vget+0x141 sys/ufs/ffs/ffs_vfsops.c:1343 #6 ffs_inode_alloc+0x1c2 sys/ufs/ffs/ffs_alloc.c:394 #7 ufs_mkdir+0xf8 sys/ufs/ufs/ufs_vnops.c:1149 #8 VOP_MKDIR+0xc3 sys/kern/vfs_vops.c:388 #9 domkdirat+0x125 sys/kern/vfs_syscalls.c:3073 #10 syscall+0x5e2 mi_syscall sys/sys/syscall_mi.h:110 [inline] #10 syscall+0x5e2 sys/arch/amd64/amd64/trap.c:623 #11 Xsyscall+0x128 exclusive rrwlock inode r = 0 (0xfffffd806b916098) #0 witness_lock+0x447 #1 rw_enter+0x3c8 sys/kern/kern_rwlock.c:309 #2 rrw_enter+0x8c sys/kern/kern_rwlock.c:464 #3 VOP_LOCK+0x8b sys/kern/vfs_vops.c:518 #4 vn_lock+0x84 sys/kern/vfs_vnops.c:564 #5 vfs_lookup+0xd5 sys/kern/vfs_lookup.c:418 #6 namei+0x55a sys/kern/vfs_lookup.c:250 #7 domkdirat+0x79 sys/kern/vfs_syscalls.c:3058 #8 syscall+0x5e2 mi_syscall sys/sys/syscall_mi.h:110 [inline] #8 syscall+0x5e2 sys/arch/amd64/amd64/trap.c:623 #9 Xsyscall+0x128 ddb{0}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10217 6798K 7447K 78643K 14812 0 pcb 13 10K 11K 78643K 36 0 rtable 236 6K 6K 78643K 393 0 pf 32 9K 10K 78643K 61 0 ifaddr 45 15K 15K 78643K 61 0 ifgroup 55 2K 2K 78643K 85 0 sysctl 2 0K 0K 78643K 2 0 counters 60 35K 36K 78643K 78 0 ioctlops 0 0K 4K 78643K 1508 0 iov 0 0K 18K 78643K 42 0 mount 1 1K 1K 78643K 1 0 log 0 0K 0K 78643K 4 0 vnodes 1355 85K 85K 78643K 2319 0 UFS quota 1 32K 32K 78643K 1 0 UFS mount 5 36K 36K 78643K 5 0 shm 2 1K 5K 78643K 8 0 VM map 2 1K 1K 78643K 2 0 sem 6 0K 0K 78643K 13 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1697 195K 286K 78643K 12548 0 file desc 13 45K 81K 78643K 887 0 sigio 0 0K 0K 78643K 5 0 proc 69 91K 115K 78643K 595 0 subproc 104 6K 6K 78643K 119 0 NFS srvsock 1 0K 0K 78643K 1 0 NFS daemon 1 16K 16K 78643K 1 0 ip_moptions 0 0K 0K 78643K 27 0 in_multi 99 7K 7K 78643K 116 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 55 254K 254K 78643K 55 0 exec 0 0K 1K 78643K 534 0 tdb 3 0K 0K 78643K 3 0 pagedep 1 8K 8K 78643K 1 0 inodedep 1 32K 32K 78643K 1 0 newblk 1 0K 0K 78643K 1 0 VM swap 8 62K 64K 78643K 10 0 UVM amap 316 85K 102K 78643K 11079 0 UVM aobj 27 2K 2K 78643K 27 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 12 0K 0K 78643K 39 0 temp 46 5909K 5979K 78643K 19386 0 kqueue 12 18K 25K 78643K 102 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 plcache 128 22 0 0 1 0 1 1 0 8 0 rtpcb 120 42 0 39 1 0 1 1 0 8 0 rtentry 112 124 0 13 4 0 4 4 0 8 0 unpcb 144 818 0 802 15 14 1 6 0 8 0 syncache 304 6 0 6 2 2 0 1 0 8 0 tcpqe 32 90 0 90 2 2 0 1 0 8 0 tcpcb 808 194 0 189 13 12 1 8 0 8 0 arp 120 20 0 2 1 0 1 1 0 8 0 inpcb 368 452 0 444 15 14 1 8 0 8 0 nd6 136 29 0 4 1 0 1 1 0 8 0 kcovpl 48 9 0 1 1 0 1 1 0 8 0 ppxss 1256 3 0 3 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 71 0 54 1 0 1 1 0 8 0 pfstkey 128 71 0 54 2 0 2 2 0 8 0 pfstate 376 71 0 54 4 1 3 4 0 8 0 pfrule 1344 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 256 509 0 51 29 0 29 29 0 8 0 art_table 32 510 0 51 4 0 4 4 0 8 0 art_node 16 123 0 22 1 0 1 1 0 8 0 sysvmsgpl 40 4 0 4 1 1 0 1 0 8 0 semapl 112 7 0 3 1 0 1 1 0 8 0 shmpl 112 24 0 0 1 0 1 1 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 2443 0 989 92 0 92 92 0 8 0 ffsino 272 2443 0 989 98 0 98 98 0 8 0 nchpl 144 3804 0 2148 64 0 64 64 0 8 0 uvmvnodes 80 3505 0 0 72 0 72 72 0 8 0 vnodes 216 3505 0 0 195 0 195 195 0 8 0 namei 1024 14054 0 14053 3 2 1 2 0 8 0 percpumem 16 52 0 9 1 0 1 1 0 8 0 vmpool 696 9 0 9 1 1 0 1 0 8 0 kstatmem 264 42 0 18 2 0 2 2 0 8 0 scxspl 216 12049 0 12049 10 9 1 8 1 8 1 plimitpl 152 54 0 38 1 0 1 1 0 8 0 sigapl 424 1211 0 1166 7 1 6 6 0 8 0 futexpl 64 6719 0 6718 1 0 1 1 0 8 0 knotepl 120 122 0 0 4 0 4 4 0 8 0 kqueuepl 216 200 0 192 5 4 1 5 0 8 0 pipepl 320 412 0 384 13 10 3 8 0 8 0 fdescpl 496 1193 0 1167 5 0 5 5 0 8 0 filepl 152 7123 0 6882 29 18 11 18 0 8 1 lockfpl 104 1377 0 1375 3 2 1 2 0 8 0 lockfspl 48 687 0 685 1 0 1 1 0 8 0 sessionpl 144 25 0 8 1 0 1 1 0 8 0 pgrppl 48 32 0 15 1 0 1 1 0 8 0 ucredpl 104 603 0 590 1 0 1 1 0 8 0 zombiepl 144 1168 0 1166 1 0 1 1 0 8 0 processpl 1072 1211 0 1166 4 0 4 4 0 8 0 procpl 680 2616 0 2554 8 1 7 7 0 8 0 sosppl 168 4 0 4 2 2 0 1 0 8 0 sockpl 488 1312 0 1285 48 44 4 25 0 8 0 mcl64k 65536 7 0 0 1 0 1 1 0 8 0 mcl16k 16384 5 0 0 1 0 1 1 0 8 0 mcl12k 12288 6 0 0 1 0 1 1 0 8 0 mcl9k 9216 2 0 0 1 0 1 1 0 8 0 mcl8k 8192 14 0 0 2 0 2 2 0 8 0 mcl4k 4096 31 0 0 4 0 4 4 0 8 0 mcl2k2 2112 3 0 0 1 0 1 1 0 8 0 mcl2k 2048 242 0 0 31 0 31 31 0 8 0 mtagpl 96 571 0 0 14 0 14 14 0 8 0 mbufpl 256 2031 0 0 125 0 125 125 0 8 0 bufpl 288 5302 0 146 369 0 369 369 0 8 0 anonpl 24 276408 0 263360 90 4 86 87 0 186 0 amapchunkpl 152 35719 0 34911 40 3 37 38 0 158 1 amappl16 200 7232 0 6844 22 1 21 22 0 8 0 amappl15 192 19 0 19 1 1 0 1 0 8 0 amappl14 184 168 0 154 2 1 1 2 0 8 0 amappl13 176 24 0 22 1 0 1 1 0 8 0 amappl12 168 1878 0 1850 3 1 2 2 0 8 0 amappl11 160 99 0 85 1 0 1 1 0 8 0 amappl10 152 30 0 21 1 0 1 1 0 8 0 amappl9 144 206 0 206 3 3 0 1 0 8 0 amappl8 136 215 0 160 2 0 2 2 0 8 0 amappl7 128 98 0 83 2 0 2 2 0 8 0 amappl6 120 253 0 234 2 1 1 2 0 8 0 amappl5 112 192 0 181 1 0 1 1 0 8 0 amappl4 104 634 0 586 3 1 2 3 0 8 0 amappl3 96 7262 0 7188 3 0 3 3 0 8 0 amappl2 88 1469 0 1400 3 1 2 3 0 8 0 amappl1 80 12981 0 12435 23 10 13 23 0 8 0 amappl 88 10515 0 10310 7 1 6 6 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 72 26 0 0 1 0 1 1 0 8 0 uaddrrnd 24 1202 0 1176 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 1202 0 1176 1 0 1 1 0 8 0 vmmpekpl 168 15380 0 15333 3 0 3 3 0 8 0 vmmpepl 168 93739 0 91586 147 24 123 127 0 357 20 vmsppl 464 1201 0 1176 5 1 4 5 0 8 0 rwobjpl 56 34186 0 29197 72 1 71 71 0 8 0 pdppl 4096 2412 0 2352 144 74 70 78 0 8 10 pvpl 32 615605 0 597262 348 59 289 347 0 265 126 pmappl 248 1201 0 1176 3 0 3 3 0 8 0 extentpl 40 56 0 38 1 0 1 1 0 8 0 phpool 112 943 0 106 24 0 24 24 0 8 0 ddb{0}> machine ddbcpu 0 Invalid cpu 0 ddb{0}> trace witness_checkorder(fffffd806ef6fcb8,9,0) at witness_checkorder+0x1ec sys/kern/subr_witness.c:794 mtx_enter(fffffd806ef6fca8) at mtx_enter+0x3e sys/kern/kern_lock.c:265 knote_remove(ffff800021284000,fffffd806ef6fca8,fffffd806ef6fd30,3,0) at knote_remove+0x20d sys/kern/kern_event.c:1881 knote_fdclose(ffff800021284000,3) at knote_fdclose+0xae sys/kern/kern_event.c:1934 fdfree(ffff800021284000) at fdfree+0xdf sys/kern/kern_descrip.c:1196 exit1(ffff800021284000,0,0,1) at exit1+0x3e4 sys/kern/kern_exit.c:206 sys_exit(ffff800021284000,ffff800022d71a30,ffff800022d71a80) at sys_exit+0x1a sys/kern/kern_exit.c:89 syscall(ffff800022d71b00) at syscall+0x5e2 mi_syscall sys/sys/syscall_mi.h:110 [inline] syscall(ffff800022d71b00) at syscall+0x5e2 sys/arch/amd64/amd64/trap.c:623 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x774a05adca60, count: -9 ddb{0}> machine ddbcpu 1 Stopped at x86_ipi_db+0x1e: addq $0x8,%rsp x86_ipi_db(ffff800020d58ff0) at x86_ipi_db+0x1e sys/arch/amd64/amd64/db_interface.c:393 x86_ipi_handler() at x86_ipi_handler+0xb7 sys/arch/amd64/amd64/ipi.c:106 Xresume_lapic_ipi() at Xresume_lapic_ipi+0x27 __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x29 kd_curproc sys/dev/kcov.c:589 [inline] __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x29 sys/dev/kcov.c:158 __mp_lock(ffffffff82d8c508) at __mp_lock+0x133 __mp_lock_spin sys/kern/kern_lock.c:116 [inline] __mp_lock(ffffffff82d8c508) at __mp_lock+0x133 sys/kern/kern_lock.c:147 reaper(ffff8000211b3a98) at reaper+0x160 sys/kern/kern_exit.c:454 end trace frame: 0x0, count: 9 ddb{1}> trace x86_ipi_db(ffff800020d58ff0) at x86_ipi_db+0x1e sys/arch/amd64/amd64/db_interface.c:393 x86_ipi_handler() at x86_ipi_handler+0xb7 sys/arch/amd64/amd64/ipi.c:106 Xresume_lapic_ipi() at Xresume_lapic_ipi+0x27 __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x29 kd_curproc sys/dev/kcov.c:589 [inline] __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x29 sys/dev/kcov.c:158 __mp_lock(ffffffff82d8c508) at __mp_lock+0x133 __mp_lock_spin sys/kern/kern_lock.c:116 [inline] __mp_lock(ffffffff82d8c508) at __mp_lock+0x133 sys/kern/kern_lock.c:147 reaper(ffff8000211b3a98) at reaper+0x160 sys/kern/kern_exit.c:454 end trace frame: 0x0, count: -6