uvm_fault(0xfffffd806e0f9b50, 0x48, 0, 1) -> e kernel: page fault trap, code=0 Stopped at witness_checkorder+0xa9: movl 0x20(%r14),%r15d TID PID UID PRFLAGS PFLAGS CPU COMMAND 37136 89135 0 0x14000 0x200 1 reaper witness_checkorder(28,9,0) at witness_checkorder+0xa9 sys/kern/subr_witness.c:779 mtx_enter(18) at mtx_enter+0x47 sys/kern/kern_lock.c:238 clockintr_unbind(ffff80000149df30,1) at clockintr_unbind+0x56 sys/kern/kern_clockintr.c:375 dt_ioctl_record_stop(ffff80000148c000) at dt_ioctl_record_stop+0xbc sys/dev/dt/dt_dev.c:575 dtclose(31e5f,81,2000,ffff80003c4519c8) at dtclose+0x105 dt_pcb_purge sys/dev/dt/dt_dev.c:-1 [inline] dtclose(31e5f,81,2000,ffff80003c4519c8) at dtclose+0x105 sys/dev/dt/dt_dev.c:232 spec_close(ffff80002a3a0f30) at spec_close+0x45f sys/kern/spec_vnops.c:-1 VOP_CLOSE(fffffd80655981c8,81,fffffd807f7d2138,ffff80003c4519c8) at VOP_CLOSE+0x133 sys/kern/vfs_vops.c:156 vn_closefile(fffffd800b35fe00,ffff80003c4519c8) at vn_closefile+0x12b vn_close sys/kern/vfs_vnops.c:292 [inline] vn_closefile(fffffd800b35fe00,ffff80003c4519c8) at vn_closefile+0x12b sys/kern/vfs_vnops.c:615 fdrop(fffffd800b35fe00,ffff80003c4519c8) at fdrop+0x126 sys/kern/kern_descrip.c:1267 closef(fffffd800b35fe00,ffff80003c4519c8) at closef+0x192 sys/kern/kern_descrip.c:1251 fdfree(ffff80003c4519c8) at fdfree+0x116 sys/kern/kern_descrip.c:1182 exit1(ffff80003c4519c8,0,0,1) at exit1+0x58f sys/kern/kern_exit.c:214 sys_exit(ffff80003c4519c8,ffff80002a3a12a0,ffff80002a3a11f0) at sys_exit+0x1a sys/kern/kern_exit.c:-1 syscall(ffff80002a3a12a0) at syscall+0xb08 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80002a3a12a0) at syscall+0xb08 sys/arch/amd64/amd64/trap.c:579 end trace frame: 0xffff80002a3a1320, 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 *cpu0: uvm_fault(0xfffffd806e0f9b50, 0x48, 0, 1) -> e ddb{0}> trace witness_checkorder(28,9,0) at witness_checkorder+0xa9 sys/kern/subr_witness.c:779 mtx_enter(18) at mtx_enter+0x47 sys/kern/kern_lock.c:238 clockintr_unbind(ffff80000149df30,1) at clockintr_unbind+0x56 sys/kern/kern_clockintr.c:375 dt_ioctl_record_stop(ffff80000148c000) at dt_ioctl_record_stop+0xbc sys/dev/dt/dt_dev.c:575 dtclose(31e5f,81,2000,ffff80003c4519c8) at dtclose+0x105 dt_pcb_purge sys/dev/dt/dt_dev.c:-1 [inline] dtclose(31e5f,81,2000,ffff80003c4519c8) at dtclose+0x105 sys/dev/dt/dt_dev.c:232 spec_close(ffff80002a3a0f30) at spec_close+0x45f sys/kern/spec_vnops.c:-1 VOP_CLOSE(fffffd80655981c8,81,fffffd807f7d2138,ffff80003c4519c8) at VOP_CLOSE+0x133 sys/kern/vfs_vops.c:156 vn_closefile(fffffd800b35fe00,ffff80003c4519c8) at vn_closefile+0x12b vn_close sys/kern/vfs_vnops.c:292 [inline] vn_closefile(fffffd800b35fe00,ffff80003c4519c8) at vn_closefile+0x12b sys/kern/vfs_vnops.c:615 fdrop(fffffd800b35fe00,ffff80003c4519c8) at fdrop+0x126 sys/kern/kern_descrip.c:1267 closef(fffffd800b35fe00,ffff80003c4519c8) at closef+0x192 sys/kern/kern_descrip.c:1251 fdfree(ffff80003c4519c8) at fdfree+0x116 sys/kern/kern_descrip.c:1182 exit1(ffff80003c4519c8,0,0,1) at exit1+0x58f sys/kern/kern_exit.c:214 sys_exit(ffff80003c4519c8,ffff80002a3a12a0,ffff80002a3a11f0) at sys_exit+0x1a sys/kern/kern_exit.c:-1 syscall(ffff80002a3a12a0) at syscall+0xb08 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80002a3a12a0) at syscall+0xb08 sys/arch/amd64/amd64/trap.c:579 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x769adc71a030, count: -15 ddb{0}> show registers rdi 0 rsi 0 rbp 0xffff80002a3a0da0 rbx 0 rdx 0 rcx 0xffff80003c4519c8 rax 0xffffffff837bbff0 cpu_info_full_primary+0x1ff0 r8 0xffffffffffffffff r9 0x4bf00 acpi_pdirpa+0x37d71 r10 0x23cfdf01fced871d r11 0x8e9fe61c47a762ce r12 0 r13 0x1 r14 0x28 r15 0x3 rip 0xffffffff82a7b5f9 witness_checkorder+0xa9 cs 0x8 rflags 0x10246 __ALIGN_SIZE+0xf246 rsp 0xffff80002a3a0cf0 ss 0x10 witness_checkorder+0xa9: movl 0x20(%r14),%r15d ddb{0}> show proc PROC (syz-executor) tid=254302 pid=42865 tcnt=0 stat=onproc flags process=1018 proc=2000 runpri=32, usrpri=82, slppri=32, nice=20 wchan=0x0, wmesg=, ps_single=0xffff80003c4519c8 scnt=-1 ecnt=1 forw=0xffffffffffffffff, list=0xffff80003c450cf8,0xffffffff83a13120 process=0xffff80003c4eaf58 user=0xffff80002a39c000, vmspace=0xfffffd806e0f9b50 estcpu=32, cpticks=0, pctcpu=0.1, user=0, sys=0, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND 21593 507046 82240 0 3 0x82 wait syz-executor 35099 311555 61269 0 2 0xc90 syz-executor 35099 94050 61269 0 3 0x4000090 sbwait syz-executor 35099 49723 61269 0 3 0x4000090 fsleep syz-executor 91551 480502 81960 0 2 0xc80 syz-executor 91551 365704 81960 0 3 0x4000080 kqpoll syz-executor 52280 220688 68365 0 2 0xc80 syz-executor 52280 228059 68365 0 3 0x4000080 ttyout syz-executor 52280 410151 68365 0 3 0x4000080 fsleep syz-executor 44591 253876 62060 0 2 0xc80 syz-executor 44591 64692 62060 0 3 0x4000080 ttyin syz-executor 44591 516665 62060 0 3 0x4000080 fsleep syz-executor 44591 228145 62060 0 3 0x4000080 fsleep syz-executor 15932 65611 36151 0 2 0xc90 syz-executor 15932 340266 36151 0 3 0x4000090 sbwait syz-executor 15932 314864 36151 0 3 0x4000090 fsleep syz-executor 62060 433879 82240 0 2 0xc82 syz-executor 68365 236804 82240 0 2 0xc82 syz-executor 42136 321419 0 0 3 0x14200 acct acct 46060 181723 1 0 3 0x100083 ttyin getty 42360 68107 0 0 3 0x14280 nfsidl nfsio 9226 326650 0 0 3 0x14280 nfsidl nfsio 94502 498940 0 0 3 0x14280 nfsidl nfsio 84016 406489 0 0 3 0x14280 nfsidl nfsio 56310 47802 0 0 3 0x14280 nfsidl nfsio 84069 502975 0 0 3 0x14280 nfsidl nfsio 14818 69294 0 0 3 0x14280 nfsidl nfsio 47060 403794 0 0 3 0x14280 nfsidl nfsio 24062 261374 0 0 3 0x14280 nfsidl nfsio 55536 438444 0 0 3 0x14280 nfsidl nfsio 98326 230768 0 0 3 0x14280 nfsidl nfsio 80645 495038 0 0 3 0x14280 nfsidl nfsio 84261 359236 0 0 3 0x14280 nfsidl nfsio 92254 223085 0 0 3 0x14280 nfsidl nfsio 97163 16511 0 0 3 0x14280 nfsidl nfsio 64020 249705 0 0 3 0x14280 nfsidl nfsio 12852 358883 0 0 3 0x14280 nfsidl nfsio 64971 150176 0 0 3 0x14280 nfsidl nfsio 40982 315839 0 0 3 0x14280 nfsidl nfsio 26102 140315 0 0 3 0x14280 nfsidl nfsio 17959 409453 0 0 3 0x14200 bored sosplice 61269 421037 82240 0 3 0x82 nanoslp syz-executor 81960 235001 82240 0 3 0x82 nanoslp syz-executor 42156 17756 82240 0 3 0x82 nanoslp syz-executor 36151 11079 82240 0 2 0xc82 syz-executor 98841 387767 82240 0 3 0x82 wait syz-executor 82240 314417 26718 0 3 0x82 kqread syz-executor 26718 509727 17108 0 3 0x10008a sigsusp ksh 17108 365874 63827 0 3 0x98 kqread sshd-session 63827 84611 79456 0 3 0x92 kqread sshd-session 79456 254164 1 0 3 0x88 kqread sshd 20750 71517 33250 74 3 0x1100092 bpf pflogd 33250 447031 1 0 3 0x80 sbwait pflogd 8440 277630 8393 73 3 0x1100090 kqread syslogd 8393 503396 1 0 3 0x100082 sbwait syslogd 46505 412762 1 0 3 0x100080 kqread resolvd 32779 390113 98679 77 3 0x100092 kqread dhcpleased 91397 144211 98679 77 3 0x100092 kqread dhcpleased 98679 267267 1 0 3 0x80 kqread dhcpleased 65843 410676 0 0 2 0x14200 smr 19251 503141 0 0 3 0x14200 pgzero zerothread 58379 281763 0 0 3 0x14200 aiodoned aiodoned 39986 46192 0 0 3 0x14200 syncer update 65359 313778 0 0 3 0x14200 cleaner cleaner 89135 37136 0 0 7 0x14200 reaper 28189 503392 0 0 3 0x14200 pgdaemon pagedaemon 3161 67533 0 0 3 0x14200 bored viomb 53802 142235 0 0 3 0x40014200 acpi0 acpi0 18114 80466 0 0 3 0x40014200 idle1 26793 454736 0 0 3 0x14200 bored softnet3 92602 286697 0 0 3 0x14200 bored softnet2 37552 393284 0 0 3 0x14200 bored softnet1 48319 206357 0 0 3 0x14200 bored softnet0 10556 202942 0 0 2 0x14200 systqmp 6411 110712 0 0 3 0x14200 bored systq 22166 89059 0 0 3 0x14200 tmoslp softclockmp 31981 24173 0 0 2 0x40014200 softclock 69713 332169 0 0 3 0x40014200 idle0 1 234330 0 0 3 0x82 wait init 0 0 -1 0 3 0x10010200 scheduler swapper ddb{0}> show all locks Process 44591 (syz-executor) thread 0xffff80003c450a68 (64692) exclusive rrwlock inode r = 0 (0xfffffd806df8abf8) #0 witness_lock+0x5bb stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5bb sys/kern/subr_witness.c:1160 #1 rw_do_enter_write+0x3ea sys/kern/kern_rwlock.c:316 #2 rrw_enter+0xc6 sys/kern/kern_rwlock.c:616 #3 VOP_LOCK+0xa6 sys/kern/vfs_vops.c:527 #4 vn_lock+0xa4 sys/kern/vfs_vnops.c:570 #5 spec_open+0x305 sys/kern/spec_vnops.c:151 #6 VOP_OPEN+0x8b sys/kern/vfs_vops.c:138 #7 vn_open+0x708 sys/kern/vfs_vnops.c:177 #8 vndioctl+0xcb1 sys/dev/vnd.c:457 #9 VOP_IOCTL+0xac sys/kern/vfs_vops.c:264 #10 vn_ioctl+0xf8 sys/kern/vfs_vnops.c:531 #11 sys_ioctl+0x5c3 sys/kern/sys_generic.c:-1 #12 syscall+0xbc6 mi_syscall sys/sys/syscall_mi.h:176 [inline] #12 syscall+0xbc6 sys/arch/amd64/amd64/trap.c:579 #13 Xsyscall+0x128 Process 89135 (reaper) thread 0xffff8000ffffcf68 (37136) exclusive kernel: protection fault trap, code=0 Faulted in DDB; continuing... ddb{0}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10255 11159K 12544K 166960K 13768 0 pcb 17 13K 14K 166960K 210 0 rtable 229 10K 10K 166960K 562 0 pf 38 18K 22K 166960K 147 0 ifaddr 41 7K 8K 166960K 98 0 ifgroup 59 2K 2K 166960K 173 0 sysctl 4 1K 9K 166960K 13 0 counters 68 36K 37K 166960K 310 0 ioctlops 0 0K 4K 166960K 1802 0 iov 0 0K 20K 166960K 136 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1528 96K 96K 166960K 2858 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 4 9K 13K 166960K 25 0 VM map 2 1K 1K 166960K 2 0 sem 12 0K 0K 166960K 47 0 dirhash 12 2K 2K 166960K 39 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 17 61K 93K 166960K 1318 0 sigio 0 0K 0K 166960K 17 0 proc 73 103K 128K 166960K 761 0 subproc 72 4K 4K 166960K 102 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 1 0K 0K 166960K 148 0 in_multi 90 6K 7K 166960K 155 0 ether_multi 2 0K 0K 166960K 6 0 mrt 2 0K 0K 166960K 5 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 235 1049K 1049K 166960K 235 0 exec 0 0K 1K 166960K 632 0 fusefs mount 1 32K 32K 166960K 1 0 pfkey data 0 0K 0K 166960K 2 0 tdb 3 0K 0K 166960K 3 0 VM swap 8 62K 64K 166960K 10 0 UVM amap 266 168K 182K 166960K 13748 0 UVM aobj 36 5K 5K 166960K 38 0 pinsyscall 42 84K 102K 166960K 2484 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 1K 166960K 73 0 NDP 13 0K 2K 166960K 70 0 temp 80 8684K 8755K 166960K 59406 0 kqueue 14 22K 33K 166960K 263 0 SYN cache 2 10K 18K 166960K 3 0 ddb{0}> 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 120 175 0 172 3 2 1 3 0 8 0 rtentry 176 174 0 75 6 0 6 6 0 8 0 unpcb 144 852 0 825 10 8 2 6 0 8 1 syncache 336 7 0 7 3 2 1 1 0 8 1 tcpcb 808 402 0 391 9 7 2 5 0 8 0 arp 128 34 0 16 1 0 1 1 0 8 0 inpcb 384 1300 0 1282 19 14 5 8 0 8 3 nd6 144 36 0 10 2 0 2 2 0 8 0 pkpcb 40 22 0 22 2 1 1 1 0 8 1 kcovpl 48 11 0 3 1 0 1 1 0 8 0 ppxss 1192 106 0 106 2 1 1 1 0 8 1 pppxif 1504 3 0 3 3 2 1 1 0 8 1 pfstscr 40 1 0 1 1 1 0 1 0 8 0 pffrag 232 9 0 2 2 1 1 1 0 482 0 pffrnode 88 8 0 2 2 1 1 1 0 8 0 pffrent 40 14 0 7 2 1 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 pfanchor 1288 2 0 0 1 0 1 1 0 8 0 pfstitem 24 74 0 25 1 0 1 1 0 8 0 pfstkey 128 76 0 27 2 0 2 2 0 8 0 pfstate 384 75 0 26 5 0 5 5 0 8 0 pfrule 1344 23 0 16 2 1 1 2 0 8 0 rttmr 136 1 0 1 1 1 0 1 0 8 0 art_heap8 4096 2 0 0 2 0 2 2 0 8 0 art_heap4 256 708 0 252 34 5 29 32 0 8 0 art_table 32 710 0 252 5 1 4 5 0 8 0 art_node 16 172 0 87 1 0 1 1 0 8 0 sysvmsgpl 40 25 0 14 1 0 1 1 0 8 0 semapl 112 43 0 33 1 0 1 1 0 8 0 shmpl 112 35 0 2 1 0 1 1 0 8 0 dirhash 1024 35 0 18 3 0 3 3 0 8 0 dino2pl 256 3941 0 2424 95 0 95 95 0 8 0 ffsino 288 3941 0 2424 109 0 109 109 0 8 0 nchpl 144 5843 0 5282 64 39 25 64 0 8 0 rtmask 32 11 0 11 3 2 1 1 0 8 1 uvmvnodes 80 3723 0 0 76 0 76 76 0 8 0 vnodes 216 3723 0 0 207 0 207 207 0 8 0 namei 1024 20585 0 20585 2 1 1 2 0 8 1 percpumem 16 170 0 121 1 0 1 1 0 8 0 kstatmem 264 104 0 74 3 0 3 3 0 8 0 scsiplug 72 2 0 2 2 2 0 1 0 8 0 scxspl 216 16854 0 16854 12 9 3 8 1 8 3 plimitpl 152 345 0 327 1 0 1 1 0 8 0 sigapl 424 1639 0 1567 10 1 9 9 0 8 0 knotepl 120 538 0 0 17 0 17 17 0 8 0 kqueuepl 224 515 0 503 6 4 2 3 0 8 1 pipepl 336 235 0 208 3 0 3 3 0 8 0 fdescpl 520 1598 0 1567 3 0 3 3 0 8 0 filepl 160 10811 0 10568 32 20 12 19 0 8 1 lockfpl 104 368 0 366 1 0 1 1 0 8 0 lockfspl 48 165 0 163 1 0 1 1 0 8 0 sessionpl 144 31 0 22 1 0 1 1 0 8 0 pgrppl 48 65 0 48 1 0 1 1 0 8 0 ucredpl 104 2071 0 2054 1 0 1 1 0 8 0 zombiepl 144 1953 0 1950 1 0 1 1 0 8 0 processpl 1208 1639 0 1567 6 0 6 6 0 8 0 procpl 656 3657 0 3572 8 0 8 8 0 8 0 srpgc 96 6 0 6 2 2 0 1 0 8 0 sosppl 168 9 0 9 3 2 1 1 0 8 1 sockpl 728 2444 0 2398 29 23 6 16 0 8 1 mcl64k 65536 4 0 0 1 0 1 1 0 8 0 mcl16k 16384 6 0 0 1 0 1 1 0 8 0 mcl12k 12288 1 0 0 1 0 1 1 0 8 0 mcl9k 9216 1 0 0 1 0 1 1 0 8 0 mcl8k 8192 5 0 0 1 0 1 1 0 8 0 mcl4k 4096 121 0 0 16 1 15 16 0 8 0 mcl2k 2048 35 0 0 4 0 4 4 0 8 0 mtagpl 96 68 0 0 2 0 2 2 0 8 0 mbufpl 256 286 0 0 18 0 18 18 0 8 0 bufpl 280 5750 0 127 402 0 402 402 0 8 0 anonpl 32 9195 0 0 75 0 75 75 0 246 0 amapchunkpl 152 46009 0 45382 53 20 33 38 0 158 7 amappl16 200 3277 0 3219 16 11 5 16 0 8 0 amappl15 192 1 0 1 1 1 0 1 0 8 0 amappl14 184 126 0 114 1 0 1 1 0 8 0 amappl13 176 7 0 7 2 2 0 1 0 8 0 amappl12 168 2283 0 2252 4 1 3 3 0 8 0 amappl11 160 49 0 35 1 0 1 1 0 8 0 amappl10 152 8 0 6 1 0 1 1 0 8 0 amappl9 144 253 0 253 1 1 0 1 0 8 0 amappl8 136 30 0 27 1 0 1 1 0 8 0 amappl7 128 116 0 104 1 0 1 1 0 8 0 amappl6 120 207 0 202 1 0 1 1 0 8 0 amappl5 112 138 0 128 1 0 1 1 0 8 0 amappl4 104 339 0 316 1 0 1 1 0 8 0 amappl3 96 9225 0 9101 5 1 4 4 0 8 0 amappl2 88 693 0 629 2 0 2 2 0 8 0 amappl1 80 14246 0 13647 18 3 15 15 0 8 0 amappl 88 12809 0 12615 5 0 5 5 0 92 0 dma4096 4096 1 0 1 1 1 0 1 0 8 0 dma1024 1024 2 0 1 1 0 1 1 0 8 0 dma256 256 6 0 6 1 1 0 1 0 8 0 dma128 128 254 0 254 2 2 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 37 0 2 1 0 1 1 0 8 0 uaddrrnd 24 1598 0 1567 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 1598 0 1567 1 0 1 1 0 8 0 vmmpekpl 168 14229 0 14180 3 0 3 3 0 8 0 vmmpepl 168 103595 0 101536 112 14 98 101 0 357 2 vmsppl 480 1597 0 1567 6 1 5 5 0 8 0 rwobjpl 72 30925 0 26164 91 2 89 89 0 8 2 pdppl 4096 3204 0 3134 120 46 74 86 0 8 4 pvpl 32 16980 0 0 138 1 137 137 0 265 0 pmappl 256 1597 0 1567 3 0 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 427 0 64 11 0 11 11 0 8 0 ddb{0}> machine ddbcpu 0 Invalid cpu 0 ddb{0}> trace witness_checkorder(28,9,0) at witness_checkorder+0xa9 sys/kern/subr_witness.c:779 mtx_enter(18) at mtx_enter+0x47 sys/kern/kern_lock.c:238 clockintr_unbind(ffff80000149df30,1) at clockintr_unbind+0x56 sys/kern/kern_clockintr.c:375 dt_ioctl_record_stop(ffff80000148c000) at dt_ioctl_record_stop+0xbc sys/dev/dt/dt_dev.c:575 dtclose(31e5f,81,2000,ffff80003c4519c8) at dtclose+0x105 dt_pcb_purge sys/dev/dt/dt_dev.c:-1 [inline] dtclose(31e5f,81,2000,ffff80003c4519c8) at dtclose+0x105 sys/dev/dt/dt_dev.c:232 spec_close(ffff80002a3a0f30) at spec_close+0x45f sys/kern/spec_vnops.c:-1 VOP_CLOSE(fffffd80655981c8,81,fffffd807f7d2138,ffff80003c4519c8) at VOP_CLOSE+0x133 sys/kern/vfs_vops.c:156 vn_closefile(fffffd800b35fe00,ffff80003c4519c8) at vn_closefile+0x12b vn_close sys/kern/vfs_vnops.c:292 [inline] vn_closefile(fffffd800b35fe00,ffff80003c4519c8) at vn_closefile+0x12b sys/kern/vfs_vnops.c:615 fdrop(fffffd800b35fe00,ffff80003c4519c8) at fdrop+0x126 sys/kern/kern_descrip.c:1267 closef(fffffd800b35fe00,ffff80003c4519c8) at closef+0x192 sys/kern/kern_descrip.c:1251 fdfree(ffff80003c4519c8) at fdfree+0x116 sys/kern/kern_descrip.c:1182 exit1(ffff80003c4519c8,0,0,1) at exit1+0x58f sys/kern/kern_exit.c:214 sys_exit(ffff80003c4519c8,ffff80002a3a12a0,ffff80002a3a11f0) at sys_exit+0x1a sys/kern/kern_exit.c:-1 syscall(ffff80002a3a12a0) at syscall+0xb08 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80002a3a12a0) at syscall+0xb08 sys/arch/amd64/amd64/trap.c:579 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x769adc71a030, count: -15 ddb{0}> machine ddbcpu 1 Stopped at x86_ipi_db+0x27: addq $0x8,%rsp x86_ipi_db(ffff8000299ddff0) 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 sys/dev/kcov.c:149 reaper(ffff8000ffffcf68) at reaper+0x218 sys/kern/kern_exit.c:482 end trace frame: 0x0, count: 10 ddb{1}> trace x86_ipi_db(ffff8000299ddff0) 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 sys/dev/kcov.c:149 reaper(ffff8000ffffcf68) at reaper+0x218 sys/kern/kern_exit.c:482 end trace frame: 0x0, count: -5