panic: bad dir Stopped at db_enter+0x18: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND 134019 53844 0 0 0 1 syz-executor.0 * 75864 75223 0 0 0 0K dhcpleased db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:440 panic(ffffffff8247ee87) at panic+0x177 sys/kern/subr_prf.c:202 ufs_lookup() at ufs_lookup+0x174c ufs_dirbad sys/ufs/ufs/ufs_lookup.c:609 [inline] ufs_lookup() at ufs_lookup+0x174c sys/ufs/ufs/ufs_lookup.c:444 VOP_LOOKUP(fffffd806f234658,ffff8000211dc398,ffff8000211dc3c8) at VOP_LOOKUP+0x58 sys/kern/vfs_vops.c:85 vfs_lookup(ffff8000211dc368) at vfs_lookup+0x6e5 sys/kern/vfs_lookup.c:561 namei(ffff8000211dc368) at namei+0x36a sys/kern/vfs_lookup.c:245 vn_open(ffff8000211dc368,1,0) at vn_open+0x105 sys/kern/vfs_vnops.c:146 doopenat(ffff800021193ce8,ffffff9c,7f7ffffd2c10,0,0,ffff8000211dc550) at doopenat+0x26a sys/kern/vfs_syscalls.c:1128 syscall(ffff8000211dc5c0) at syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff8000211dc5c0) at syscall+0x489 sys/arch/amd64/amd64/trap.c:585 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f7ffffd2c00, count: 5 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: bad dir ddb{0}> trace db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:440 panic(ffffffff8247ee87) at panic+0x177 sys/kern/subr_prf.c:202 ufs_lookup() at ufs_lookup+0x174c ufs_dirbad sys/ufs/ufs/ufs_lookup.c:609 [inline] ufs_lookup() at ufs_lookup+0x174c sys/ufs/ufs/ufs_lookup.c:444 VOP_LOOKUP(fffffd806f234658,ffff8000211dc398,ffff8000211dc3c8) at VOP_LOOKUP+0x58 sys/kern/vfs_vops.c:85 vfs_lookup(ffff8000211dc368) at vfs_lookup+0x6e5 sys/kern/vfs_lookup.c:561 namei(ffff8000211dc368) at namei+0x36a sys/kern/vfs_lookup.c:245 vn_open(ffff8000211dc368,1,0) at vn_open+0x105 sys/kern/vfs_vnops.c:146 doopenat(ffff800021193ce8,ffffff9c,7f7ffffd2c10,0,0,ffff8000211dc550) at doopenat+0x26a sys/kern/vfs_syscalls.c:1128 syscall(ffff8000211dc5c0) at syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff8000211dc5c0) at syscall+0x489 sys/arch/amd64/amd64/trap.c:585 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f7ffffd2c00, count: -10 ddb{0}> show registers rdi 0 rsi 0x1 rbp 0xffff8000211dbe20 rbx 0xffffffff827d0bff cpu_info_full_primary+0x2bff rdx 0 rcx 0 rax 0xffff800021193ce8 r8 0x101010101010101 r9 0x8080808080808080 r10 0x65f9f9906c6bc664 r11 0x88dd9d08418d96be r12 0xffffffff827d0a00 cpu_info_full_primary+0x2a00 r13 0 r14 0 r15 0x1 rip 0xffffffff815ada48 db_enter+0x18 cs 0x8 rflags 0x246 rsp 0xffff8000211dbe10 ss 0x10 db_enter+0x18: addq $0x8,%rsp ddb{0}> show proc PROC (dhcpleased) pid=75864 stat=onproc flags process=0 proc=0 pri=17, usrpri=51, nice=20 forw=0xffffffffffffffff, list=0xffff800021192008,0xffff8000ffff7a60 process=0xffff8000ffff8008 user=0xffff8000211d7000, vmspace=0xfffffd8008586730 estcpu=1, cpticks=1, pctcpu=0.0 user=0, sys=1, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND 53844 134019 17268 0 7 0 syz-executor.0 20694 232846 84897 0 2 0 syz-executor.2 20694 317513 84897 0 3 0x4000080 fsleep syz-executor.2 91515 97060 16975 0 2 0 syz-executor.3 91515 440095 16975 0 3 0x4000080 fsleep syz-executor.3 17268 314958 52015 0 2 0x2 syz-executor.0 35301 185758 0 0 3 0x14280 nfsidl nfsio 10561 196637 0 0 3 0x14280 nfsidl nfsio 87905 314972 0 0 3 0x14280 nfsidl nfsio 72917 234562 0 0 3 0x14280 nfsidl nfsio 3210 188799 0 0 3 0x14280 nfsidl nfsio 5073 516556 0 0 3 0x14280 nfsidl nfsio 7799 277014 0 0 3 0x14280 nfsidl nfsio 60415 190907 0 0 3 0x14280 nfsidl nfsio 73485 514575 0 0 3 0x14280 nfsidl nfsio 68343 61365 0 0 3 0x14280 nfsidl nfsio 31021 26516 0 0 3 0x14280 nfsidl nfsio 41697 320909 0 0 3 0x14280 nfsidl nfsio 55215 400234 0 0 3 0x14280 nfsidl nfsio 78307 86876 0 0 3 0x14280 nfsidl nfsio 24245 419433 0 0 3 0x14280 nfsidl nfsio 53167 327507 0 0 3 0x14280 nfsidl nfsio 72186 164340 0 0 3 0x14280 nfsidl nfsio 28739 307228 0 0 3 0x14280 nfsidl nfsio 46915 11284 0 0 3 0x14280 nfsidl nfsio 69672 291252 0 0 3 0x14280 nfsidl nfsio 84897 454560 52015 0 2 0x482 syz-executor.2 16975 190653 52015 0 3 0x82 nanoslp syz-executor.3 27943 396990 52015 0 2 0x2 syz-executor.1 55586 256130 1 0 3 0x100083 ttyin getty 63513 293773 0 0 3 0x14200 acct acct 56567 320899 0 0 3 0x14200 bored sosplice 52015 430591 56210 0 3 0x82 thrsleep syz-fuzzer 52015 510225 56210 0 3 0x4000082 nanoslp syz-fuzzer 52015 72526 56210 0 3 0x4000082 thrsleep syz-fuzzer 52015 27251 56210 0 3 0x4000082 thrsleep syz-fuzzer 52015 244628 56210 0 3 0x4000082 thrsleep syz-fuzzer 52015 276528 56210 0 3 0x4000082 thrsleep syz-fuzzer 52015 11702 56210 0 3 0x4000082 kqread syz-fuzzer 52015 81818 56210 0 3 0x4000082 thrsleep syz-fuzzer 56210 36647 18855 0 3 0x10008a sigsusp ksh 18855 22794 3207 0 3 0x9a poll sshd 3207 388837 1 0 3 0x88 poll sshd 40348 178325 94219 74 3 0x100092 bpf pflogd 94219 383337 1 0 3 0x80 netio pflogd 90914 365253 84798 73 3 0x100090 kqread syslogd 84798 454403 1 0 3 0x100082 netio syslogd 82749 411523 1 0 3 0x100080 kqread resolvd 16090 77730 75223 77 3 0x100092 kqread dhcpleased 88217 171240 75223 77 3 0x100092 kqread dhcpleased *75223 75864 1 0 7 0 dhcpleased 4170 310671 0 0 3 0x14200 bored smr 73313 26981 0 0 2 0x14200 zerothread 40486 142423 0 0 3 0x14200 aiodoned aiodoned 55501 169371 0 0 3 0x14200 syncer update 6444 397048 0 0 3 0x14200 cleaner cleaner 56459 194799 0 0 3 0x14200 reaper reaper 78317 331091 0 0 3 0x14200 pgdaemon pagedaemon 74288 18860 0 0 3 0x14200 bored viomb 63556 383635 0 0 3 0x40014200 acpi0 acpi0 18423 411892 0 0 3 0x40014200 idle1 23248 270086 0 0 3 0x14200 bored softnet 221 165688 0 0 3 0x14200 bored systqmp 77942 47468 0 0 3 0x14200 bored systq 79084 265496 0 0 2 0x40014200 softclock 31339 32895 0 0 3 0x40014200 idle0 1 516660 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{0}> show all locks Process 75223 (dhcpleased) thread 0xffff800021193ce8 (75864) exclusive kernel_lock &kernel_lock r = 0 (0xffffffff828cff68) #0 witness_lock+0x44d #1 __mp_acquire_count+0x48 sys/kern/kern_lock.c:227 #2 mi_switch+0x3d3 sys/kern/sched_bsd.c:416 #3 sleep_finish+0x1b2 sys/kern/kern_synch.c:433 #4 tsleep+0x12c sys/kern/kern_synch.c:158 #5 biowait+0x91 sys/kern/vfs_bio.c:1271 #6 ffs_bufatoff+0x125 sys/ufs/ffs/ffs_subr.c:71 #7 ufs_lookup+0x466 sys/ufs/ufs/ufs_lookup.c:258 #8 VOP_LOOKUP+0x58 sys/kern/vfs_vops.c:85 #9 vfs_lookup+0x6e5 sys/kern/vfs_lookup.c:561 #10 namei+0x36a sys/kern/vfs_lookup.c:245 #11 vn_open+0x105 sys/kern/vfs_vnops.c:146 #12 doopenat+0x26a sys/kern/vfs_syscalls.c:1128 #13 syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline] #13 syscall+0x489 sys/arch/amd64/amd64/trap.c:585 #14 Xsyscall+0x128 exclusive rrwlock inode r = 0 (0xfffffd806f1130a0) #0 witness_lock+0x44d #1 rw_enter+0x3e1 sys/kern/kern_rwlock.c:310 #2 rrw_enter+0x8b sys/kern/kern_rwlock.c:461 #3 VOP_LOCK+0x87 sys/kern/vfs_vops.c:534 #4 vn_lock+0x84 sys/kern/vfs_vnops.c:579 #5 vget+0x1d3 sys/kern/vfs_subr.c:677 #6 cache_lookup+0x2b4 sys/kern/vfs_cache.c:224 #7 ufs_lookup+0x1ac sys/ufs/ufs/ufs_lookup.c:162 #8 VOP_LOOKUP+0x58 sys/kern/vfs_vops.c:85 #9 vfs_lookup+0x6e5 sys/kern/vfs_lookup.c:561 #10 namei+0x36a sys/kern/vfs_lookup.c:245 #11 vn_open+0x105 sys/kern/vfs_vnops.c:146 #12 doopenat+0x26a sys/kern/vfs_syscalls.c:1128 #13 syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline] #13 syscall+0x489 sys/arch/amd64/amd64/trap.c:585 #14 Xsyscall+0x128 ddb{0}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10223 6594K 10623K 78643K 49491 0 pcb 13 24K 34K 78643K 4520 0 rtable 245 39K 42K 78643K 9028 0 ifaddr 105 26K 27K 78643K 3617 0 sysctl 3 1K 1K 78643K 3 0 counters 50 34K 35K 78643K 480 0 ioctlops 0 0K 8K 78643K 9598 0 iov 0 0K 24K 78643K 2469 0 mount 1 1K 1K 78643K 1 0 log 0 0K 0K 78643K 5 0 vnodes 1483 93K 93K 78643K 14749 0 UFS quota 1 32K 32K 78643K 1 0 UFS mount 5 36K 36K 78643K 5 0 shm 2 1K 5K 78643K 282 0 VM map 2 1K 1K 78643K 2 0 sem 12 0K 1K 78643K 2947 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1697 195K 286K 78643K 12598 0 file desc 9 29K 49K 78643K 24318 0 sigio 0 0K 0K 78643K 148 0 proc 71 87K 111K 78643K 3771 0 subproc 52 3K 3K 78643K 1240 0 NFS srvsock 1 0K 0K 78643K 1 0 NFS daemon 1 16K 16K 78643K 1 0 ip_moptions 0 0K 0K 78643K 1407 0 in_multi 51 3K 3K 78643K 2389 0 ether_multi 1 0K 0K 78643K 375 0 mrt 1 0K 0K 78643K 150 0 ISOFS mount 1 32K 32K 78643K 1 0 MSDOSFS mount 1 16K 16K 78643K 1 0 ttys 241 1076K 1076K 78643K 241 0 exec 0 0K 2K 78643K 4496 0 pfkey data 0 0K 0K 78643K 18 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 7 26K 26K 78643K 7 0 UVM amap 657 1823K 1823K 78643K 308899 0 UVM aobj 131 6K 6K 78643K 140 0 memdesc 1 4K 4K 78643K 1 0 crypto data 1 1K 1K 78643K 1 0 ip6_options 0 0K 0K 78643K 1541 0 NDP 11 0K 1K 78643K 540 0 temp 149 4278K 8376K 78643K 205533 0 kqueue 11 14K 24K 78643K 997 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 1601 0 1598 24 21 3 3 0 8 2 rtentry 112 1847 0 1792 4 2 2 3 0 8 0 unpcb 136 15574 0 15559 156 150 6 9 0 8 5 syncache 296 46 0 46 14 14 0 1 0 8 0 tcpqe 32 6 70 6 4 4 0 1 0 8 0 tcpcb 736 8188 0 8179 254 247 7 18 0 8 5 arp 120 327 0 317 1 0 1 1 0 8 0 inpcb 304 25007 0 24997 284 275 9 19 0 8 8 rttmr 72 43 0 43 15 15 0 1 0 8 0 ip6q 72 4 0 4 1 1 0 1 0 8 0 ip6af 40 12 0 12 1 1 0 1 0 8 0 nd6 48 434 0 422 1 0 1 1 0 8 0 pkpcb 40 82 0 82 14 14 0 1 0 8 0 kcovpl 48 95 0 91 1 0 1 1 0 8 0 ppxss 1248 43 0 43 13 13 0 1 0 8 0 pfstscr 40 343 0 343 11 11 0 1 0 8 0 pffrag 232 128 0 127 12 11 1 1 0 482 0 pffrnode 88 128 0 127 12 11 1 1 0 8 0 pffrent 40 1103 0 1102 12 11 1 1 0 8 0 pfosfp 40 1435 0 1009 5 0 5 5 0 8 0 pfosfpen 112 1435 0 714 21 0 21 21 0 8 0 pfrktable 1344 1951 0 1901 16 11 5 5 0 8 0 pftag 88 24 0 15 1 0 1 1 0 8 0 pfqueue 264 7 0 7 2 2 0 1 0 8 0 pfstitem 24 173 0 171 1 0 1 1 0 8 0 pfstkey 112 556 0 554 2 1 1 2 0 8 0 pfstate 320 356 0 354 4 3 1 4 0 8 0 pfrule 1360 6200 0 5805 37 3 34 34 0 8 1 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 6617 0 6347 48 29 19 21 0 8 0 art_table 32 6618 0 6347 5 2 3 3 0 8 0 art_node 16 1837 0 1790 1 0 1 1 0 8 0 sysvmsgpl 40 33 0 5 1 0 1 1 0 8 0 semapl 112 2945 0 2935 1 0 1 1 0 8 0 shmpl 112 137 0 9 4 0 4 4 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 32394 0 30916 93 0 93 93 0 8 0 ffsino 272 32394 0 30916 99 0 99 99 0 8 0 nchpl 144 69434 0 67840 61 0 61 61 0 8 0 uvmvnodes 80 6174 0 0 126 0 126 126 0 8 0 vnodes 224 6174 0 0 364 0 364 364 0 8 0 namei 1024 248780 0 248779 5 4 1 2 0 8 0 percpumem 16 252 0 215 1 0 1 1 0 8 0 vcpupl 2048 355 0 0 45 0 45 45 0 8 0 vmpool 560 474 0 119 27 1 26 26 0 8 0 pfiaddrpl 120 688 0 590 7 3 4 4 0 8 1 scsiplug 72 12 0 12 4 4 0 1 0 8 0 scxspl 216 193196 0 193196 54 51 3 7 0 8 3 plimitpl 152 2608 0 2597 1 0 1 1 0 8 0 sigapl 424 24328 0 24270 9 2 7 7 0 8 0 futexpl 64 204188 0 204186 7 6 1 1 0 8 0 knotepl 112 282 0 0 4 1 3 3 0 8 0 kqueuepl 216 4405 0 4396 92 87 5 6 0 8 4 pipepl 336 4992 0 4976 152 148 4 12 0 8 2 fdescpl 496 24271 0 24249 6 3 3 4 0 8 0 filepl 152 181424 0 181270 248 234 14 16 0 8 8 lockfpl 104 7128 0 7126 15 14 1 3 0 8 0 lockfspl 48 2154 0 2152 2 1 1 2 0 8 0 sessionpl 144 113 0 100 1 0 1 1 0 8 0 pgrppl 48 245 0 232 1 0 1 1 0 8 0 ucredpl 96 22895 0 22867 1 0 1 1 0 8 0 zombiepl 144 24270 0 24270 2 1 1 1 0 8 1 processpl 1064 24328 0 24270 4 0 4 4 0 8 0 procpl 672 70908 0 70841 45 38 7 8 0 8 1 srpgc 96 122 0 122 22 22 0 1 0 8 0 sosppl 168 160 0 160 33 33 0 1 0 8 0 sockpl 480 42359 0 42330 820 807 13 34 0 8 8 mcl64k 65536 50 0 0 4 1 3 3 0 8 0 mcl16k 16384 28 0 0 4 2 2 3 0 8 0 mcl12k 12288 88 0 0 2 0 2 2 0 8 0 mcl9k 9216 41 0 0 2 0 2 2 0 8 0 mcl8k 8192 65 0 0 5 2 3 3 0 8 0 mcl4k 4096 41 0 0 5 2 3 3 0 8 0 mcl2k2 2112 16 0 0 2 0 2 2 0 8 0 mcl2k 2048 325 0 0 21 3 18 21 0 8 0 mtagpl 96 1007 0 0 12 0 12 12 0 8 0 mbufpl 256 4018 0 0 211 0 211 211 0 8 0 bufpl 288 42064 0 35747 454 0 454 454 0 8 0 anonpl 24 6983587 0 6958268 558 385 173 186 0 186 0 amapchunkpl 152 796058 0 795145 220 169 51 52 0 158 11 amappl16 200 63996 0 62993 284 228 56 63 0 8 0 amappl15 192 2993 0 2991 1 0 1 1 0 8 0 amappl14 184 3548 0 3543 2 1 1 1 0 8 0 amappl13 176 2855 0 2852 1 0 1 1 0 8 0 amappl12 168 2344 0 2329 1 0 1 1 0 8 0 amappl11 160 2582 0 2568 1 0 1 1 0 8 0 amappl10 152 3008 0 2999 1 0 1 1 0 8 0 amappl9 144 2909 0 2904 1 0 1 1 0 8 0 amappl8 136 7846 0 7727 5 0 5 5 0 8 0 amappl7 128 5971 0 5960 1 0 1 1 0 8 0 amappl6 120 3144 0 3119 1 0 1 1 0 8 0 amappl5 112 21203 0 21185 1 0 1 1 0 8 0 amappl4 104 7761 0 7728 1 0 1 1 0 8 0 amappl3 96 5380 0 5363 1 0 1 1 0 8 0 amappl2 88 5785 0 5730 2 0 2 2 0 8 0 amappl1 80 445135 0 444647 13 1 12 13 0 8 0 amappl 88 306347 0 306019 10 1 9 9 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 72 139 0 9 3 0 3 3 0 8 0 uaddrrnd 24 24745 0 24368 3 0 3 3 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 24745 0 24368 3 0 3 3 0 8 0 vmmpekpl 168 170999 0 170926 4 0 4 4 0 8 0 vmmpepl 168 2234673 0 2231425 702 531 171 174 0 357 20 vmsppl 368 24744 0 24368 36 1 35 35 0 8 0 rwobjpl 56 541539 0 533178 164 44 120 121 0 8 0 pdppl 4096 49498 0 49091 498 89 409 409 0 8 2 pvpl 32 11887557 0 11866191 769 570 199 258 0 265 4 pmappl 248 24744 0 24368 25 1 24 24 0 8 0 extentpl 40 57 0 38 1 0 1 1 0 8 0 phpool 112 1978 0 533 42 0 42 42 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:440 panic(ffffffff8247ee87) at panic+0x177 sys/kern/subr_prf.c:202 ufs_lookup() at ufs_lookup+0x174c ufs_dirbad sys/ufs/ufs/ufs_lookup.c:609 [inline] ufs_lookup() at ufs_lookup+0x174c sys/ufs/ufs/ufs_lookup.c:444 VOP_LOOKUP(fffffd806f234658,ffff8000211dc398,ffff8000211dc3c8) at VOP_LOOKUP+0x58 sys/kern/vfs_vops.c:85 vfs_lookup(ffff8000211dc368) at vfs_lookup+0x6e5 sys/kern/vfs_lookup.c:561 namei(ffff8000211dc368) at namei+0x36a sys/kern/vfs_lookup.c:245 vn_open(ffff8000211dc368,1,0) at vn_open+0x105 sys/kern/vfs_vnops.c:146 doopenat(ffff800021193ce8,ffffff9c,7f7ffffd2c10,0,0,ffff8000211dc550) at doopenat+0x26a sys/kern/vfs_syscalls.c:1128 syscall(ffff8000211dc5c0) at syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff8000211dc5c0) at syscall+0x489 sys/arch/amd64/amd64/trap.c:585 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f7ffffd2c00, count: -10 ddb{0}> machine ddbcpu 1 Stopped at x86_ipi_db+0x1a: addq $0x8,%rsp x86_ipi_db(ffff800020d38ff0) at x86_ipi_db+0x1a 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+0x23 __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x18 kd_curproc sys/dev/kcov.c:578 [inline] __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x18 sys/dev/kcov.c:148 __mp_lock(ffffffff828cfd60) at __mp_lock+0x133 __mp_lock_spin sys/kern/kern_lock.c:116 [inline] __mp_lock(ffffffff828cfd60) at __mp_lock+0x133 sys/kern/kern_lock.c:147 syscall(ffff800027bff7c0) at syscall+0x3ef mi_syscall sys/sys/syscall_mi.h:93 [inline] syscall(ffff800027bff7c0) at syscall+0x3ef sys/arch/amd64/amd64/trap.c:585 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f7fffffad70, count: 8 ddb{1}> trace x86_ipi_db(ffff800020d38ff0) at x86_ipi_db+0x1a 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+0x23 __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x18 kd_curproc sys/dev/kcov.c:578 [inline] __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x18 sys/dev/kcov.c:148 __mp_lock(ffffffff828cfd60) at __mp_lock+0x133 __mp_lock_spin sys/kern/kern_lock.c:116 [inline] __mp_lock(ffffffff828cfd60) at __mp_lock+0x133 sys/kern/kern_lock.c:147 syscall(ffff800027bff7c0) at syscall+0x3ef mi_syscall sys/sys/syscall_mi.h:93 [inline] syscall(ffff800027bff7c0) at syscall+0x3ef sys/arch/amd64/amd64/trap.c:585 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f7fffffad70, count: -7