panic: thread 503674 not in SRUN: 4 Stopped at db_enter+0x1c: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND 295335 88714 0 0x2000002 0x4000000 1 syz-fuzzer db_enter() at db_enter+0x1c sys/arch/amd64/amd64/db_interface.c:437 panic(ffffffff827904f5) at panic+0x17b sys/kern/subr_prf.c:198 sched_chooseproc() at sched_chooseproc+0x34e sys/kern/kern_sched.c:326 mi_switch() at mi_switch+0x26c sys/kern/sched_bsd.c:414 sleep_finish(0,1) at sleep_finish+0x19b sys/kern/kern_synch.c:414 msleep(ffffffff82d59478,ffffffff82c4a2b0,4,ffffffff8285c87f,0) at msleep+0xea sys/kern/kern_synch.c:249 reaper(ffff8000211b3a98) at reaper+0xdb sys/kern/kern_exit.c:437 end trace frame: 0x0, count: 8 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: thread 503674 not in SRUN: 4 ddb{0}> trace db_enter() at db_enter+0x1c sys/arch/amd64/amd64/db_interface.c:437 panic(ffffffff827904f5) at panic+0x17b sys/kern/subr_prf.c:198 sched_chooseproc() at sched_chooseproc+0x34e sys/kern/kern_sched.c:326 mi_switch() at mi_switch+0x26c sys/kern/sched_bsd.c:414 sleep_finish(0,1) at sleep_finish+0x19b sys/kern/kern_synch.c:414 msleep(ffffffff82d59478,ffffffff82c4a2b0,4,ffffffff8285c87f,0) at msleep+0xea sys/kern/kern_synch.c:249 reaper(ffff8000211b3a98) at reaper+0xdb sys/kern/kern_exit.c:437 end trace frame: 0x0, count: -7 ddb{0}> show registers rdi 0 rsi 0x1 rbp 0xffff8000211b9270 rbx 0xffffffff82bfdb9f cpu_info_full_primary+0x2b9f rdx 0 rcx 0xffff8000211b3a98 rax 0xffffffff82bfcff0 cpu_info_full_primary+0x1ff0 r8 0x101010101010101 r9 0x8080808080808080 r10 0x72b44ef0cb91e548 r11 0x943853b19cf9ba97 r12 0xffffffff82bfd9a0 cpu_info_full_primary+0x29a0 r13 0 r14 0 r15 0x1 rip 0xffffffff8138849c db_enter+0x1c cs 0x8 rflags 0x246 rsp 0xffff8000211b9260 ss 0x10 db_enter+0x1c: addq $0x8,%rsp ddb{0}> show proc PROC (reaper) pid=328967 stat=sleep flags process=14000 proc=200 pri=4, usrpri=52, nice=20 forw=0x0, list=0xffff8000211b3d40,0xffff8000211b3800 process=0xffff8000ffffee10 user=0xffff8000211b4000, vmspace=0xffffffff82ca7a48 estcpu=2, cpticks=5, pctcpu=0.52 user=0, sys=0, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND 34450 251204 89572 32767 3 0x3810 suspend syz-executor.4 34450 503674 89572 32767 4 0x40818b0 syz-executor.4 34450 377464 89572 32767 2 0x4081890 syz-executor.4 88705 153908 1612 32767 3 0x90 nanoslp syz-executor.1 88705 366680 1612 32767 3 0x4000090 ttyin syz-executor.1 88705 391406 1612 32767 3 0x4000090 fsleep syz-executor.1 88705 352277 1612 32767 3 0x4000090 fsleep syz-executor.1 62825 142158 34717 32767 3 0x90 nanoslp syz-executor.0 62825 490809 34717 32767 3 0x4000090 netio syz-executor.0 62825 375575 34717 32767 3 0x4000090 fsleep syz-executor.0 72258 103110 58944 32767 2 0x10 syz-executor.5 72258 387899 58944 32767 3 0x4000090 netio syz-executor.5 70383 130195 99498 32767 3 0x10 biowait syz-executor.7 99498 518257 88714 0 3 0x82 wait syz-executor.7 34717 186443 17321 32767 3 0x90 nanoslp syz-executor.0 17321 215960 88714 0 3 0x82 wait syz-executor.0 34141 373559 37181 32767 3 0x10 biowait syz-executor.2 37181 170339 88714 0 3 0x82 wait syz-executor.2 1612 50210 31106 32767 3 0x90 nanoslp syz-executor.1 31106 450627 88714 0 3 0x82 wait syz-executor.1 68130 504176 11336 32767 2 0x10 syz-executor.6 11336 12894 88714 0 3 0x82 wait syz-executor.6 71107 515336 95655 32767 3 0x90 piperd syz-executor.3 95655 16029 88714 0 3 0x82 wait syz-executor.3 58944 455206 32502 32767 3 0x90 nanoslp syz-executor.5 32502 297842 88714 0 3 0x82 wait syz-executor.5 89572 476451 30424 32767 3 0x90 nanoslp syz-executor.4 30424 157204 88714 0 3 0x82 wait syz-executor.4 90143 268159 0 0 3 0x14200 bored sosplice 88714 84892 75655 0 3 0x2000082 wait syz-fuzzer 88714 60623 75655 0 3 0x6000082 nanoslp syz-fuzzer 88714 381415 75655 0 3 0x6000082 thrsleep syz-fuzzer 88714 169122 75655 0 3 0x6000082 wait syz-fuzzer 88714 161525 75655 0 3 0x6000082 wait syz-fuzzer 88714 354414 75655 0 3 0x6000082 thrsleep syz-fuzzer 88714 515242 75655 0 3 0x6000082 thrsleep syz-fuzzer 88714 437448 75655 0 3 0x6000082 wait syz-fuzzer 88714 295335 75655 0 7 0x6000002 syz-fuzzer 88714 248782 75655 0 3 0x6000082 thrsleep syz-fuzzer 88714 310153 75655 0 3 0x6000082 thrsleep syz-fuzzer 88714 27869 75655 0 3 0x6000082 wait syz-fuzzer 88714 242423 75655 0 3 0x6000082 wait syz-fuzzer 88714 104936 75655 0 3 0x6000082 wait syz-fuzzer 88714 423776 75655 0 3 0x6000082 wait syz-fuzzer 88714 404663 75655 0 2 0x6000002 syz-fuzzer 75655 55546 79128 0 3 0x10008a sigsusp ksh 79128 81720 95824 0 3 0x9a kqread sshd 20153 349256 1 0 3 0x100083 ttyin getty 95824 400918 1 0 3 0x88 kqread sshd 83932 41159 21407 73 3 0x1100090 kqread syslogd 21407 107044 1 0 3 0x100082 netio syslogd 15675 14820 1 0 3 0x100080 kqread resolvd 37292 157914 44467 77 3 0x100092 kqread dhcpleased 79801 435446 44467 77 3 0x100092 kqread dhcpleased 44467 403339 1 0 3 0x80 kqread dhcpleased 95030 980 0 0 3 0x14200 bored smr 24752 239249 0 0 2 0x14200 zerothread 51478 8842 0 0 3 0x14200 aiodoned aiodoned 48181 239863 0 0 3 0x14200 syncer update 75310 129707 0 0 3 0x14200 cleaner cleaner *96649 328967 0 0 3 0x14200 reaper reaper 21654 115568 0 0 3 0x14200 pgdaemon pagedaemon 76141 2706 0 0 3 0x14200 bored viomb 27350 436147 0 0 3 0x40014200 acpi0 acpi0 24008 443958 0 0 3 0x40014200 idle1 66167 224323 0 0 3 0x14200 bored softnet3 19773 165981 0 0 3 0x14200 bored softnet2 18989 107993 0 0 3 0x14200 bored softnet1 75374 370344 0 0 3 0x14200 bored softnet0 79632 83814 0 0 3 0x14200 bored systqmp 57831 487197 0 0 3 0x14200 bored systq 14636 100471 0 0 3 0x40014200 bored softclock 84249 41355 0 0 3 0x40014200 idle0 1 472294 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{0}> show all locks CPU 0: exclusive sched_lock &sched_lock r = 0 (0xffffffff82d4ae50) #0 witness_lock+0x447 #1 sleep_finish+0x142 sys/kern/kern_synch.c:398 #2 msleep+0xea sys/kern/kern_synch.c:249 #3 reaper+0xdb sys/kern/kern_exit.c:437 #4 proc_trampoline+0x1c Process 70383 (syz-executor.7) thread 0xffff8000211f5558 (130195) exclusive rrwlock inode r = 0 (0xfffffd8066e413d8) #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 (0xfffffd8066e41928) #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 34141 (syz-executor.2) thread 0xffff8000289c3a98 (373559) exclusive rrwlock inode r = 0 (0xfffffd807728d3d0) #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 (0xfffffd80675d8e70) #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 ddb{0}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10222 6413K 6420K 78643K 11437 0 pcb 13 12K 14K 78643K 17 0 rtable 248 7K 7K 78643K 2680 0 pf 29 8K 8K 78643K 119 0 ifaddr 44 15K 16K 78643K 230 0 ifgroup 50 2K 2K 78643K 230 0 sysctl 3 1K 5K 78643K 73 0 counters 60 35K 35K 78643K 150 0 ioctlops 0 0K 2K 78643K 418 0 iov 0 0K 28K 78643K 3282 0 mount 1 1K 1K 78643K 1 0 log 0 0K 0K 78643K 4 0 vnodes 1279 80K 80K 78643K 17973 0 UFS quota 1 32K 32K 78643K 1 0 UFS mount 5 36K 36K 78643K 5 0 shm 2 1K 9K 78643K 377 0 VM map 2 1K 1K 78643K 2 0 sem 12 0K 0K 78643K 2888 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1697 195K 286K 78643K 12548 0 file desc 22 81K 117K 78643K 28381 0 sigio 0 0K 0K 78643K 422 0 proc 56 78K 127K 78643K 3402 0 subproc 104 6K 6K 78643K 689 0 NFS srvsock 1 0K 0K 78643K 1 0 NFS daemon 1 16K 16K 78643K 1 0 ip_moptions 0 0K 0K 78643K 1542 0 in_multi 99 7K 7K 78643K 756 0 ether_multi 1 0K 0K 78643K 14 0 mrt 1 0K 0K 78643K 2 0 ISOFS mount 1 32K 32K 78643K 1 0 MSDOSFS mount 1 16K 16K 78643K 1 0 ttys 271 1208K 1208K 78643K 271 0 exec 0 0K 1K 78643K 3835 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 485 94K 117K 78643K 284145 0 UVM aobj 131 4K 4K 78643K 134 0 memdesc 1 4K 4K 78643K 1 0 crypto data 1 1K 1K 78643K 1 0 ip6_options 0 0K 0K 78643K 666 0 NDP 11 0K 2K 78643K 162 0 temp 74 5920K 6048K 78643K 71715 0 kqueue 12 18K 35K 78643K 3492 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 1752 0 1749 21 20 1 3 0 8 0 rtentry 112 653 0 536 4 0 4 4 0 8 0 unpcb 144 15610 0 15595 188 180 8 11 0 8 7 syncache 304 361 0 361 67 66 1 1 0 8 1 sackhl 24 6 0 6 6 6 0 1 0 8 0 tcpqe 32 645 0 645 41 40 1 1 0 8 1 tcpcb 808 15799 0 15771 348 341 7 17 0 8 0 arp 120 116 0 97 1 0 1 1 0 8 0 ipq 40 45 0 43 17 16 1 1 0 8 0 ipqe 40 287 0 285 17 16 1 1 0 8 0 inpcb 368 29730 0 29695 416 403 13 20 0 8 7 nd6 136 198 0 168 5 3 2 2 0 8 0 kcovpl 48 53 0 45 1 0 1 1 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 2610 0 2138 38 8 30 30 0 8 0 art_table 32 2611 0 2138 4 0 4 4 0 8 0 art_node 16 652 0 545 1 0 1 1 0 8 0 sysvmsgpl 40 6 0 0 1 0 1 1 0 8 0 semapl 112 2886 0 2876 1 0 1 1 0 8 0 shmpl 112 131 0 3 4 0 4 4 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 49145 0 47690 92 0 92 92 0 8 0 ffsino 272 49145 0 47690 98 0 98 98 0 8 0 nchpl 144 85549 0 83906 63 0 63 63 0 8 0 uvmvnodes 80 5926 0 0 121 0 121 121 0 8 0 vnodes 216 5926 0 0 330 0 330 330 0 8 0 namei 1024 309890 0 309890 9 8 1 2 0 8 1 percpumem 16 88 0 45 1 0 1 1 0 8 0 kstatmem 264 112 0 90 2 0 2 2 0 8 0 scxspl 216 241909 0 241907 97 94 3 8 1 8 2 plimitpl 152 3851 0 3826 35 34 1 2 0 8 0 sigapl 424 28587 0 28536 7 0 7 7 0 8 0 futexpl 64 223334 0 223329 7 6 1 1 0 8 0 knotepl 120 2226 0 0 17 5 12 17 0 8 0 kqueuepl 216 8451 0 8443 137 136 1 8 0 8 0 pipepl 320 7020 0 6992 185 182 3 13 0 8 0 fdescpl 496 28569 0 28536 7 2 5 6 0 8 0 filepl 152 225296 0 225053 427 410 17 24 0 8 6 lockfpl 104 5368 0 5366 3 2 1 2 0 8 0 lockfspl 48 1567 0 1565 1 0 1 1 0 8 0 sessionpl 144 68 0 52 1 0 1 1 0 8 0 pgrppl 48 550 0 534 1 0 1 1 0 8 0 ucredpl 104 80451 0 80433 1 0 1 1 0 8 0 zombiepl 144 28537 0 28536 1 0 1 1 0 8 0 processpl 1072 28587 0 28536 5 1 4 5 0 8 0 procpl 680 81623 0 81549 64 56 8 9 0 8 1 sosppl 168 1404 0 1402 58 57 1 1 0 8 0 sockpl 488 48485 0 48432 940 921 19 39 0 8 9 mcl64k 65536 71 0 0 6 3 3 3 0 8 0 mcl16k 16384 57 0 0 4 1 3 3 0 8 0 mcl12k 12288 49 0 0 2 0 2 2 0 8 0 mcl9k 9216 17 0 0 2 0 2 2 0 8 0 mcl8k 8192 62 0 0 5 2 3 3 0 8 0 mcl4k 4096 137 0 0 6 3 3 4 0 8 0 mcl2k2 2112 17 0 0 2 0 2 2 0 8 0 mcl2k 2048 614 0 0 32 22 10 32 0 8 0 mtagpl 96 18 0 0 1 0 1 1 0 8 0 mbufpl 256 3018 0 0 89 0 89 89 0 8 0 bufpl 288 52124 0 45796 453 0 453 453 0 8 0 anonpl 24 2849047 0 2837715 260 162 98 109 0 186 0 amapchunkpl 152 903580 0 902719 312 273 39 55 0 158 1 amappl16 200 57261 0 56993 396 372 24 37 0 8 8 amappl15 192 19 0 18 1 0 1 1 0 8 0 amappl14 184 295 0 280 2 1 1 2 0 8 0 amappl13 176 12 0 12 3 3 0 1 0 8 0 amappl12 168 29888 0 29852 2 0 2 2 0 8 0 amappl11 160 58 0 48 1 0 1 1 0 8 0 amappl10 152 109 0 92 1 0 1 1 0 8 0 amappl9 144 407 0 406 1 0 1 1 0 8 0 amappl8 136 1418 0 1188 10 1 9 9 0 8 0 amappl7 128 219 0 202 2 1 1 2 0 8 0 amappl6 120 836 0 811 2 1 1 2 0 8 0 amappl5 112 910 0 901 1 0 1 1 0 8 0 amappl4 104 1483 0 1438 8 6 2 2 0 8 0 amappl3 96 175761 0 175669 47 44 3 4 0 8 0 amappl2 88 30058 0 29977 3 1 2 3 0 8 0 amappl1 80 108608 0 108082 22 10 12 22 0 8 0 amappl 88 282266 0 281999 9 1 8 8 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 72 133 0 3 3 0 3 3 0 8 0 uaddrrnd 24 28569 0 28536 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 28569 0 28536 1 0 1 1 0 8 0 vmmpekpl 168 228788 0 228719 4 0 4 4 0 8 0 vmmpepl 168 1656363 0 1653898 462 335 127 135 0 357 2 vmsppl 464 28568 0 28536 7 2 5 6 0 8 0 rwobjpl 56 410445 0 402916 121 10 111 112 0 8 0 pdppl 4096 57146 0 57072 1172 1090 82 94 0 8 8 pvpl 32 8106405 0 8088612 820 634 186 360 0 265 7 pmappl 248 28568 0 28536 4 1 3 3 0 8 0 extentpl 40 56 0 38 1 0 1 1 0 8 0 phpool 112 2839 0 1939 27 0 27 27 0 8 0 ddb{0}> machine ddbcpu 0 Invalid cpu 0 ddb{0}> trace db_enter() at db_enter+0x1c sys/arch/amd64/amd64/db_interface.c:437 panic(ffffffff827904f5) at panic+0x17b sys/kern/subr_prf.c:198 sched_chooseproc() at sched_chooseproc+0x34e sys/kern/kern_sched.c:326 mi_switch() at mi_switch+0x26c sys/kern/sched_bsd.c:414 sleep_finish(0,1) at sleep_finish+0x19b sys/kern/kern_synch.c:414 msleep(ffffffff82d59478,ffffffff82c4a2b0,4,ffffffff8285c87f,0) at msleep+0xea sys/kern/kern_synch.c:249 reaper(ffff8000211b3a98) at reaper+0xdb sys/kern/kern_exit.c:437 end trace frame: 0x0, count: -7 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(ffffffff82d4ac48) at __mp_lock+0x133 __mp_lock_spin sys/kern/kern_lock.c:116 [inline] __mp_lock(ffffffff82d4ac48) at __mp_lock+0x133 sys/kern/kern_lock.c:147 sys_sched_yield(ffff8000211f4568,ffff8000212bfb70,ffff8000212bfbc0) at sys_sched_yield+0xc9 sys/kern/kern_synch.c:581 syscall(ffff8000212bfc40) at syscall+0x606 mi_syscall sys/sys/syscall_mi.h:110 [inline] syscall(ffff8000212bfc40) at syscall+0x606 sys/arch/amd64/amd64/trap.c:623 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x22c221330, count: 7 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(ffffffff82d4ac48) at __mp_lock+0x133 __mp_lock_spin sys/kern/kern_lock.c:116 [inline] __mp_lock(ffffffff82d4ac48) at __mp_lock+0x133 sys/kern/kern_lock.c:147 sys_sched_yield(ffff8000211f4568,ffff8000212bfb70,ffff8000212bfbc0) at sys_sched_yield+0xc9 sys/kern/kern_synch.c:581 syscall(ffff8000212bfc40) at syscall+0x606 mi_syscall sys/sys/syscall_mi.h:110 [inline] syscall(ffff8000212bfc40) at syscall+0x606 sys/arch/amd64/amd64/trap.c:623 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x22c221330, count: -8