uvm_fault(0xffffffff838e2518, 0xffff8000fffdde40, 0, 1) -> e kernel: page fault trap, code=0 Stopped at witness_checkorder+0xb5: movl 0x20(%r14),%r15d TID PID UID PRFLAGS PFLAGS CPU COMMAND witness_checkorder(ffff8000fffdde20,9,0) at witness_checkorder+0xb5 sys/kern/subr_witness.c:779 mtx_enter(ffff8000fffdde10) at mtx_enter+0x4a sys/kern/kern_lock.c:260 filt_procdetach(fffffd8064486630) at filt_procdetach+0x4d sys/kern/kern_event.c:432 knote_remove(ffff8000fffe9ca8,fffffd806f71b620,fffffd806f71b6c0,5,1) at knote_remove+0x2db sys/kern/kern_event.c:-1 kqueue_purge(ffff8000fffe9ca8,fffffd806f71b620) at kqueue_purge+0x137 sys/kern/kern_event.c:1890 kqueue_close(fffffd80629f64b8,ffff8000fffe9ca8) at kqueue_close+0x48 sys/kern/kern_event.c:1934 fdrop(fffffd80629f64b8,ffff8000fffe9ca8) at fdrop+0x121 sys/kern/kern_descrip.c:1280 closef(fffffd80629f64b8,ffff8000fffe9ca8) at closef+0x192 sys/kern/kern_descrip.c:1264 fdfree(ffff8000fffe9ca8) at fdfree+0x116 sys/kern/kern_descrip.c:1195 exit1(ffff8000fffe9ca8,0,0,1) at exit1+0x576 sys/kern/kern_exit.c:215 sys_exit(ffff8000fffe9ca8,ffff80003c3fa4f0,ffff80003c3fa440) at sys_exit+0x1a sys/kern/kern_exit.c:-1 syscall(ffff80003c3fa4f0) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003c3fa4f0) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:775 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7c88eeb341a0, count: 2 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{1}> ddb{1}> set $lines = 0 ddb{1}> set $maxwidth = 0 ddb{1}> show panic *cpu1: uvm_fault(0xffffffff838e2518, 0xffff8000fffdde40, 0, 1) -> e ddb{1}> trace witness_checkorder(ffff8000fffdde20,9,0) at witness_checkorder+0xb5 sys/kern/subr_witness.c:779 mtx_enter(ffff8000fffdde10) at mtx_enter+0x4a sys/kern/kern_lock.c:260 filt_procdetach(fffffd8064486630) at filt_procdetach+0x4d sys/kern/kern_event.c:432 knote_remove(ffff8000fffe9ca8,fffffd806f71b620,fffffd806f71b6c0,5,1) at knote_remove+0x2db sys/kern/kern_event.c:-1 kqueue_purge(ffff8000fffe9ca8,fffffd806f71b620) at kqueue_purge+0x137 sys/kern/kern_event.c:1890 kqueue_close(fffffd80629f64b8,ffff8000fffe9ca8) at kqueue_close+0x48 sys/kern/kern_event.c:1934 fdrop(fffffd80629f64b8,ffff8000fffe9ca8) at fdrop+0x121 sys/kern/kern_descrip.c:1280 closef(fffffd80629f64b8,ffff8000fffe9ca8) at closef+0x192 sys/kern/kern_descrip.c:1264 fdfree(ffff8000fffe9ca8) at fdfree+0x116 sys/kern/kern_descrip.c:1195 exit1(ffff8000fffe9ca8,0,0,1) at exit1+0x576 sys/kern/kern_exit.c:215 sys_exit(ffff8000fffe9ca8,ffff80003c3fa4f0,ffff80003c3fa440) at sys_exit+0x1a sys/kern/kern_exit.c:-1 syscall(ffff80003c3fa4f0) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003c3fa4f0) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:775 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7c88eeb341a0, count: -13 ddb{1}> show registers rdi 0 rsi 0 rbp 0xffff80003c3fa0a0 rbx 0 rdx 0 rcx 0xffff8000fffe9ca8 rax 0xffff8000299ddffe r8 0x1 r9 0x20 r10 0xfe8d5795fa66143f r11 0x59b940eb35d34b5c r12 0xffffffff836651fe proc_filtops+0x6 r13 0x9 r14 0xffff8000fffdde20 r15 0 rip 0xffffffff82b05955 witness_checkorder+0xb5 cs 0x8 rflags 0x10246 __ALIGN_SIZE+0xf246 rsp 0xffff80003c3fa000 ss 0x10 witness_checkorder+0xb5: movl 0x20(%r14),%r15d ddb{1}> show proc PROC (syz-executor) tid=82861 pid=68850 tcnt=0 stat=onproc flags process=1008 proc=2000 runpri=32, usrpri=86, slppri=32, nice=20 wchan=0x0, wmesg=, ps_single=0xffff8000fffe9ca8 scnt=-1 ecnt=1 forw=0xffffffffffffffff, list=0xffff80002a28d4d8,0xffff8000fffe2fc8 process=0xffff8000fffed828 user=0xffff80003c3f5000, vmspace=0xfffffd806cb13d70 estcpu=36, cpticks=10, pctcpu=0.0, user=0, sys=1, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 4138 379350 65288 0 2 0 syz-executor 50306 191830 49620 0 2 0 syz-executor 50306 192696 49620 0 3 0x4000080 kqsel syz-executor 13993 228826 0 0 3 0x14280 nfsidl nfsio 38420 482233 0 0 3 0x14280 nfsidl nfsio 18855 366000 0 0 3 0x14280 nfsidl nfsio 5409 240215 0 0 3 0x14280 nfsidl nfsio 46810 102153 65223 0 2 0x2 syz-executor 90758 74179 0 0 3 0x14200 acct acct 14864 380721 65223 0 3 0x82 nanoslp syz-executor 37658 251362 65223 0 3 0x82 nanoslp syz-executor 18011 354610 65223 0 2 0x2 syz-executor 49620 70070 65223 0 3 0x82 nanoslp syz-executor 65288 130691 65223 0 3 0x82 nanoslp syz-executor 38719 134308 65223 0 3 0x82 nanoslp syz-executor 97780 75497 65223 0 3 0x82 nanoslp syz-executor 65223 244898 7217 0 2 0x2 syz-executor 7217 388041 35604 0 3 0x10008a sigsusp ksh 35604 189328 46953 0 3 0x98 kqread sshd-session 46953 157849 17718 0 3 0x92 kqread sshd-session 10451 236308 1 0 3 0x100083 ttyin getty 17718 502054 1 0 3 0x88 kqread sshd 36441 508780 82670 74 3 0x1100092 bpf pflogd 82670 312323 1 0 3 0x80 sbwait pflogd 75909 291280 35578 73 3 0x1100090 kqread syslogd 35578 301930 1 0 3 0x100082 sbwait syslogd 85649 19130 1 0 3 0x100080 kqread resolvd 16980 209270 89655 77 3 0x100092 kqread dhcpleased 35024 345214 89655 77 3 0x100092 kqread dhcpleased 89655 109028 1 0 3 0x80 kqread dhcpleased 54092 390307 0 0 3 0x14200 bored smr 23754 183790 0 0 2 0x14200 zerothread 18901 157807 0 0 3 0x14200 aiodoned aiodoned 18090 2317 0 0 3 0x14200 syncer update 20070 159236 0 0 3 0x14200 cleaner cleaner 24914 415165 0 0 3 0x14200 reaper reaper 88839 369409 0 0 3 0x14200 pgdaemon pagedaemon 48122 433421 0 0 3 0x14200 bored viomb 11157 213238 0 0 3 0x40014200 acpi0 acpi0 36402 349982 0 0 3 0x40014200 idle1 62632 129923 0 0 3 0x14200 bored softnet1 18069 367072 0 0 3 0x14200 bored softnet0 24925 101862 0 0 3 0x14200 bored systqmp 12326 191702 0 0 3 0x14200 bored systq 38168 58515 0 0 3 0x14200 tmoslp softclockmp 43183 463301 0 0 3 0x40014200 tmoslp softclock 80513 142004 0 0 3 0x40014200 idle0 1 108871 0 0 3 0x82 wait init 0 0 -1 0 3 0x10010200 scheduler swapper ddb{1}> show all locks Process 46810 (syz-executor) thread 0xffff80002a28d4d8 (102153) exclusive rrwlock inode r = 0 (0xfffffd806c812c70) #0 witness_lock+0x5f1 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5f1 sys/kern/subr_witness.c:1160 #1 rw_do_enter_write+0x419 sys/kern/kern_rwlock.c:320 #2 rrw_enter+0xc6 sys/kern/kern_rwlock.c:621 #3 VOP_LOCK+0xa3 sys/kern/vfs_vops.c:527 #4 ufs_ihashins+0x4f ufs_ihash sys/ufs/ufs/ufs_ihash.c:-1 [inline] #4 ufs_ihashins+0x4f sys/ufs/ufs/ufs_ihash.c:159 #5 ffs_vget+0x187 sys/ufs/ffs/ffs_vfsops.c:1232 #6 ffs_inode_alloc+0x279 sys/ufs/ffs/ffs_alloc.c:393 #7 ufs_mkdir+0xfc sys/ufs/ufs/ufs_vnops.c:1112 #8 VOP_MKDIR+0x101 sys/kern/vfs_vops.c:394 #9 domkdirat+0x179 sys/kern/vfs_syscalls.c:3113 #10 syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] #10 syscall+0xb17 sys/arch/amd64/amd64/trap.c:775 #11 Xsyscall+0x128 exclusive rrwlock inode r = 0 (0xfffffd806e9b85a8) #0 witness_lock+0x5f1 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5f1 sys/kern/subr_witness.c:1160 #1 rw_do_enter_write+0x419 sys/kern/kern_rwlock.c:320 #2 rrw_enter+0xc6 sys/kern/kern_rwlock.c:621 #3 VOP_LOCK+0xa3 sys/kern/vfs_vops.c:527 #4 vn_lock+0xa4 sys/kern/vfs_vnops.c:570 #5 vfs_lookup+0x11c sys/kern/vfs_lookup.c:-1 #6 namei+0x7ca sys/kern/vfs_lookup.c:250 #7 domkdirat+0x8b sys/kern/vfs_syscalls.c:3098 #8 syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] #8 syscall+0xb17 sys/arch/amd64/amd64/trap.c:775 #9 Xsyscall+0x128 Process 18011 (syz-executor) thread 0xffff80002a28da08 (354610) exclusive rrwlock inode r = 0 (0xfffffd806c812330) #0 witness_lock+0x5f1 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5f1 sys/kern/subr_witness.c:1160 #1 rw_do_enter_write+0x419 sys/kern/kern_rwlock.c:320 #2 rrw_enter+0xc6 sys/kern/kern_rwlock.c:621 #3 VOP_LOCK+0xa3 sys/kern/vfs_vops.c:527 #4 ufs_ihashins+0x4f ufs_ihash sys/ufs/ufs/ufs_ihash.c:-1 [inline] #4 ufs_ihashins+0x4f sys/ufs/ufs/ufs_ihash.c:159 #5 ffs_vget+0x187 sys/ufs/ffs/ffs_vfsops.c:1232 #6 ffs_inode_alloc+0x279 sys/ufs/ffs/ffs_alloc.c:393 #7 ufs_mkdir+0xfc sys/ufs/ufs/ufs_vnops.c:1112 #8 VOP_MKDIR+0x101 sys/kern/vfs_vops.c:394 #9 domkdirat+0x179 sys/kern/vfs_syscalls.c:3113 #10 syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] #10 syscall+0xb17 sys/arch/amd64/amd64/trap.c:775 #11 Xsyscall+0x128 exclusive rrwlock inode r = 0 (0xfffffd80714a6eb0) #0 witness_lock+0x5f1 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5f1 sys/kern/subr_witness.c:1160 #1 rw_do_enter_write+0x419 sys/kern/kern_rwlock.c:320 #2 rrw_enter+0xc6 sys/kern/kern_rwlock.c:621 #3 VOP_LOCK+0xa3 sys/kern/vfs_vops.c:527 #4 vn_lock+0xa4 sys/kern/vfs_vnops.c:570 #5 vfs_lookup+0x11c sys/kern/vfs_lookup.c:-1 #6 namei+0x7ca sys/kern/vfs_lookup.c:250 #7 domkdirat+0x8b sys/kern/vfs_syscalls.c:3098 #8 syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] #8 syscall+0xb17 sys/arch/amd64/amd64/trap.c:775 #9 Xsyscall+0x128 ddb{1}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10221 11155K 13181K 166960K 12331 0 pcb 17 13K 13K 166960K 131 0 rtable 199 8K 8K 166960K 515 0 pf 37 18K 82K 166960K 103 0 ifaddr 37 6K 7K 166960K 77 0 ifgroup 55 2K 2K 166960K 108 0 sysctl 3 1K 9K 166960K 10 0 counters 70 37K 37K 166960K 118 0 ioctlops 0 0K 4K 166960K 1605 0 iov 0 0K 16K 166960K 92 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1437 90K 91K 166960K 1828 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 9K 166960K 27 0 VM map 2 1K 1K 166960K 2 0 sem 12 0K 0K 166960K 26 0 dirhash 12 2K 2K 166960K 12 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 15 53K 98K 166960K 659 0 sigio 0 0K 0K 166960K 8 0 proc 72 115K 164K 166960K 617 0 subproc 72 4K 4K 166960K 82 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 69 0 in_multi 77 5K 7K 166960K 130 0 ether_multi 1 0K 0K 166960K 6 0 mrt 0 0K 0K 166960K 4 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 97 440K 440K 166960K 97 0 exec 0 0K 1K 166960K 439 0 fusefs mount 1 32K 32K 166960K 1 0 pfkey data 0 0K 0K 166960K 3 0 tdb 3 0K 0K 166960K 3 0 VM swap 8 62K 64K 166960K 10 0 UVM amap 222 159K 182K 166960K 7663 0 UVM aobj 32 4K 4K 166960K 32 0 pinsyscall 40 80K 102K 166960K 1817 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 1K 166960K 92 0 NDP 14 0K 2K 166960K 50 0 temp 74 8680K 8752K 166960K 38540 0 kqueue 15 22K 29K 166960K 118 0 SYN cache 2 16K 16K 166960K 2 0 ddb{1}> show all pools Name Size Requests Fail Releases Pgreq Pgrel Npage Hiwat Minpg Maxpg Idle plcache 128 26 0 0 1 0 1 1 0 8 0 rtpcb 120 57 0 54 1 0 1 1 0 8 0 rtentry 176 137 0 56 6 0 6 6 0 8 0 unpcb 144 572 0 555 2 1 1 2 0 8 0 syncache 336 6 0 6 1 1 0 1 0 8 0 sackhl 24 1 0 1 1 1 0 1 0 8 0 tcpcb 736 118 0 113 1 0 1 1 0 8 0 arp 136 21 0 6 1 0 1 1 0 8 0 inpcb 328 710 0 637 9 2 7 7 0 8 0 nd6 152 33 0 10 1 0 1 1 0 8 0 pkpcb 40 4 0 4 1 1 0 1 0 8 0 kcovpl 48 9 0 1 1 0 1 1 0 8 0 ppxss 1192 19 0 19 1 1 0 1 0 8 0 pppxif 1504 1 0 1 1 1 0 1 0 8 0 pffrag 232 7 0 1 1 0 1 1 0 482 0 pffrnode 88 7 0 1 1 0 1 1 0 8 0 pffrent 40 13 0 6 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 pfrktable 1344 2 0 1 1 0 1 1 0 8 0 pfstitem 24 50 0 2 1 0 1 1 0 8 0 pfstkey 128 50 0 2 2 0 2 2 0 8 0 pfstate 448 50 0 2 6 0 6 6 0 8 0 pfrule 1344 23 0 17 2 1 1 2 0 8 0 art_heap8 4096 3 0 0 3 0 3 3 0 8 0 art_heap4 256 621 0 295 31 7 24 31 0 8 0 art_table 40 624 0 295 5 0 5 5 0 8 0 art_node 32 136 0 63 1 0 1 1 0 8 0 sysvmsgpl 40 2 0 2 1 1 0 1 0 8 0 semupl 112 1 0 1 1 1 0 1 0 8 0 semapl 112 23 0 13 1 0 1 1 0 8 0 shmpl 112 28 0 0 1 0 1 1 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 2469 0 959 95 0 95 95 0 8 0 ffsino 296 2469 0 959 117 0 117 117 0 8 0 nchpl 144 3384 0 1677 64 0 64 64 0 8 0 rtmask 32 3 0 3 1 1 0 1 0 8 0 vnodes 216 2856 0 0 159 0 159 159 0 8 0 namei 1024 11573 0 11571 3 2 1 2 0 8 0 percpumem 16 74 0 24 1 0 1 1 0 8 0 vcpupl 3968 1 0 0 1 0 1 1 0 8 0 vmpool 840 1 0 0 1 0 1 1 0 8 0 kstatmem 264 68 0 40 3 0 3 3 0 8 0 scsiplug 72 2 0 2 1 1 0 1 0 8 0 scxspl 216 13545 0 13545 3 2 1 2 1 8 1 plimitpl 152 221 0 203 1 0 1 1 0 8 0 sigapl 424 1017 0 966 10 2 8 10 0 8 0 knotepl 120 719 0 0 22 0 22 22 0 8 0 kqueuepl 224 233 0 222 3 2 1 3 0 8 0 pipepl 344 170 0 143 3 0 3 3 0 8 0 fdescpl 528 945 0 916 3 0 3 3 0 8 0 filepl 160 5277 0 4996 17 3 14 17 0 8 0 lockfpl 104 424 0 422 2 0 2 2 0 8 1 lockfspl 48 142 0 140 1 0 1 1 0 8 0 sessionpl 144 26 0 17 1 0 1 1 0 8 0 pgrppl 48 47 0 30 1 0 1 1 0 8 0 ucredpl 104 573 0 559 1 0 1 1 0 8 0 zombiepl 144 970 0 966 1 0 1 1 0 8 0 processpl 1232 1017 0 966 7 1 6 7 0 8 0 procpl 664 1887 0 1835 9 1 8 8 0 8 0 sosppl 176 5 0 5 2 2 0 1 0 8 0 sockpl 752 1351 0 1258 15 4 11 11 0 8 1 mcl64k 65536 5 0 0 1 0 1 1 0 8 0 mcl16k 16384 5 0 0 1 0 1 1 0 8 0 mcl9k 9216 1 0 0 1 0 1 1 0 8 0 mcl8k 8192 3 0 0 1 0 1 1 0 8 0 mcl4k 4096 114 0 0 15 0 15 15 0 8 0 mcl2k2 2112 1 0 0 1 0 1 1 0 8 0 mcl2k 2048 27 0 0 4 0 4 4 0 8 0 mtagpl 96 11 0 0 1 0 1 1 0 8 0 mbufpl 256 166 0 0 11 0 11 11 0 8 0 bufpl 280 4997 0 132 348 0 348 348 0 8 0 anonpl 32 12271 0 0 99 0 99 99 0 246 0 amapchunkpl 152 24748 0 24336 35 13 22 35 0 158 0 amappl16 200 3586 0 3521 35 26 9 29 0 8 0 amappl15 192 8 0 8 1 1 0 1 0 8 0 amappl14 184 98 0 98 1 1 0 1 0 8 0 amappl13 176 457 0 456 1 0 1 1 0 8 0 amappl12 168 1316 0 1277 3 0 3 3 0 8 0 amappl11 160 10 0 9 1 0 1 1 0 8 0 amappl10 152 55 0 41 1 0 1 1 0 8 0 amappl9 144 250 0 250 1 1 0 1 0 8 0 amappl8 136 168 0 166 1 0 1 1 0 8 0 amappl7 128 93 0 92 1 0 1 1 0 8 0 amappl6 120 292 0 279 1 0 1 1 0 8 0 amappl5 112 81 0 70 1 0 1 1 0 8 0 amappl4 104 434 0 402 1 0 1 1 0 8 0 amappl3 96 4263 0 4186 3 0 3 3 0 8 0 amappl2 88 1074 0 1002 2 0 2 2 0 8 0 amappl1 80 12038 0 11445 15 0 15 15 0 8 0 amappl 88 6810 0 6665 5 0 5 5 0 92 0 uvmvnodes 80 123 0 0 3 0 3 3 0 8 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 31 0 0 1 0 1 1 0 8 0 uaddrrnd 24 945 0 916 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 945 0 916 1 0 1 1 0 8 0 vmmpekpl 168 9637 0 9592 3 0 3 3 0 8 0 vmmpepl 168 68349 0 66503 113 16 97 111 0 357 0 vmsppl 488 944 0 915 5 0 5 5 0 8 0 rwobjpl 80 21302 0 20207 34 3 31 34 0 8 0 pdppl 4096 1900 0 1831 109 36 73 86 0 8 4 pvpl 32 20532 0 0 167 1 166 166 0 265 0 pmappl 256 945 0 915 3 0 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 291 0 48 8 0 8 8 0 8 0 ddb{1}> machine ddbcpu 0 Stopped at x86_ipi_db+0x27: addq $0x8,%rsp x86_ipi_db(ffffffff83806ff0) at x86_ipi_db+0x27 sys/arch/amd64/amd64/db_interface.c:394 x86_ipi_handler() at x86_ipi_handler+0xd9 sys/arch/amd64/amd64/ipi.c:106 Xresume_lapic_ipi() at Xresume_lapic_ipi+0x27 __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0xf kd_curproc sys/dev/kcov.c:580 [inline] __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0xf sys/dev/kcov.c:153 softintr_dispatch(0) at softintr_dispatch+0x125 sys/kern/kern_softintr.c:83 dosoftint(0) at dosoftint+0x54 sys/arch/amd64/amd64/intr.c:862 Xsoftclock() at Xsoftclock+0x27 __mp_lock(ffffffff839a9320) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:134 [inline] __mp_lock(ffffffff839a9320) at __mp_lock+0x192 sys/kern/kern_lock.c:165 exit1(ffff80002a28cd10,0,0,1) at exit1+0x701 sys/kern/kern_exit.c:260 sys_exit(ffff80002a28cd10,ffff8000313c45a0,ffff8000313c44f0) at sys_exit+0x1a sys/kern/kern_exit.c:-1 syscall(ffff8000313c45a0) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff8000313c45a0) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:775 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7d946b090e20, count: 3 ddb{0}> trace x86_ipi_db(ffffffff83806ff0) at x86_ipi_db+0x27 sys/arch/amd64/amd64/db_interface.c:394 x86_ipi_handler() at x86_ipi_handler+0xd9 sys/arch/amd64/amd64/ipi.c:106 Xresume_lapic_ipi() at Xresume_lapic_ipi+0x27 __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0xf kd_curproc sys/dev/kcov.c:580 [inline] __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0xf sys/dev/kcov.c:153 softintr_dispatch(0) at softintr_dispatch+0x125 sys/kern/kern_softintr.c:83 dosoftint(0) at dosoftint+0x54 sys/arch/amd64/amd64/intr.c:862 Xsoftclock() at Xsoftclock+0x27 __mp_lock(ffffffff839a9320) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:134 [inline] __mp_lock(ffffffff839a9320) at __mp_lock+0x192 sys/kern/kern_lock.c:165 exit1(ffff80002a28cd10,0,0,1) at exit1+0x701 sys/kern/kern_exit.c:260 sys_exit(ffff80002a28cd10,ffff8000313c45a0,ffff8000313c44f0) at sys_exit+0x1a sys/kern/kern_exit.c:-1 syscall(ffff8000313c45a0) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff8000313c45a0) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:775 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7d946b090e20, count: -12 ddb{0}> machine ddbcpu 1 Stopped at witness_checkorder+0xb5: movl 0x20(%r14),%r15d witness_checkorder(ffff8000fffdde20,9,0) at witness_checkorder+0xb5 sys/kern/subr_witness.c:779 mtx_enter(ffff8000fffdde10) at mtx_enter+0x4a sys/kern/kern_lock.c:260 filt_procdetach(fffffd8064486630) at filt_procdetach+0x4d sys/kern/kern_event.c:432 knote_remove(ffff8000fffe9ca8,fffffd806f71b620,fffffd806f71b6c0,5,1) at knote_remove+0x2db sys/kern/kern_event.c:-1 kqueue_purge(ffff8000fffe9ca8,fffffd806f71b620) at kqueue_purge+0x137 sys/kern/kern_event.c:1890 kqueue_close(fffffd80629f64b8,ffff8000fffe9ca8) at kqueue_close+0x48 sys/kern/kern_event.c:1934 fdrop(fffffd80629f64b8,ffff8000fffe9ca8) at fdrop+0x121 sys/kern/kern_descrip.c:1280 closef(fffffd80629f64b8,ffff8000fffe9ca8) at closef+0x192 sys/kern/kern_descrip.c:1264 fdfree(ffff8000fffe9ca8) at fdfree+0x116 sys/kern/kern_descrip.c:1195 exit1(ffff8000fffe9ca8,0,0,1) at exit1+0x576 sys/kern/kern_exit.c:215 sys_exit(ffff8000fffe9ca8,ffff80003c3fa4f0,ffff80003c3fa440) at sys_exit+0x1a sys/kern/kern_exit.c:-1 syscall(ffff80003c3fa4f0) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003c3fa4f0) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:775 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7c88eeb341a0, count: 2 ddb{1}> trace witness_checkorder(ffff8000fffdde20,9,0) at witness_checkorder+0xb5 sys/kern/subr_witness.c:779 mtx_enter(ffff8000fffdde10) at mtx_enter+0x4a sys/kern/kern_lock.c:260 filt_procdetach(fffffd8064486630) at filt_procdetach+0x4d sys/kern/kern_event.c:432 knote_remove(ffff8000fffe9ca8,fffffd806f71b620,fffffd806f71b6c0,5,1) at knote_remove+0x2db sys/kern/kern_event.c:-1 kqueue_purge(ffff8000fffe9ca8,fffffd806f71b620) at kqueue_purge+0x137 sys/kern/kern_event.c:1890 kqueue_close(fffffd80629f64b8,ffff8000fffe9ca8) at kqueue_close+0x48 sys/kern/kern_event.c:1934 fdrop(fffffd80629f64b8,ffff8000fffe9ca8) at fdrop+0x121 sys/kern/kern_descrip.c:1280 closef(fffffd80629f64b8,ffff8000fffe9ca8) at closef+0x192 sys/kern/kern_descrip.c:1264 fdfree(ffff8000fffe9ca8) at fdfree+0x116 sys/kern/kern_descrip.c:1195 exit1(ffff8000fffe9ca8,0,0,1) at exit1+0x576 sys/kern/kern_exit.c:215 sys_exit(ffff8000fffe9ca8,ffff80003c3fa4f0,ffff80003c3fa440) at sys_exit+0x1a sys/kern/kern_exit.c:-1 syscall(ffff80003c3fa4f0) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003c3fa4f0) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:775 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7c88eeb341a0, count: -13