witness: lock order reversal: 1st 0xffff8000299dee08 &cq->cq_mtx (&cq->cq_mtx) 2nd 0xffffffff8391e640 &sched_lock (&sched_lock) lock order [1] &cq->cq_mtx (&cq->cq_mtx) -> [2] &sched_lock (&sched_lock) #0 mtx_enter+0x4a sys/kern/kern_lock.c:260 #1 sleep_setup+0xc6 sys/kern/kern_synch.c:302 #2 msleep_nsec+0x119 sys/kern/kern_synch.c:217 #3 dt_ioctl_record_stop+0xbc sys/dev/dt/dt_dev.c:576 #4 dtclose+0x105 dt_pcb_purge sys/dev/dt/dt_dev.c:-1 [inline] #4 dtclose+0x105 sys/dev/dt/dt_dev.c:232 #5 spec_close+0x45f sys/kern/spec_vnops.c:-1 #6 VOP_CLOSE+0x133 sys/kern/vfs_vops.c:156 #7 vn_closefile+0x12b vn_close sys/kern/vfs_vnops.c:292 [inline] #7 vn_closefile+0x12b sys/kern/vfs_vnops.c:615 #8 fdrop+0x126 sys/kern/kern_descrip.c:1267 #9 closef+0x192 sys/kern/kern_descrip.c:1251 #10 fdfree+0x116 sys/kern/kern_descrip.c:1182 #11 exit1+0x59c sys/kern/kern_exit.c:215 #12 sys_exit+0x1a sys/kern/kern_exit.c:-1 #13 syscall+0xb08 mi_syscall sys/sys/syscall_mi.h:176 [inline] #13 syscall+0xb08 sys/arch/amd64/amd64/trap.c:748 #14 Xsyscall+0x128 lock order [2] &sched_lock (&sched_lock) -> [1] &cq->cq_mtx (&cq->cq_mtx) #0 mtx_enter+0x4a sys/kern/kern_lock.c:260 #1 clockintr_cancel+0x2f sys/kern/kern_clockintr.c:323 #2 mi_switch+0x172 x86_atomic_clearbits_u32 machine/atomic.h:-1 [inline] #2 mi_switch+0x172 sys/kern/sched_bsd.c:374 #3 sleep_finish+0x2da sys/kern/kern_synch.c:366 #4 sys_futex+0xa24 futex_wait sys/kern/sys_futex.c:301 [inline] #4 sys_futex+0xa24 sys/kern/sys_futex.c:151 #5 syscall+0xbc6 mi_syscall sys/sys/syscall_mi.h:176 [inline] #5 syscall+0xbc6 sys/arch/amd64/amd64/trap.c:748 #6 Xsyscall+0x128 Stopped at db_enter+0x25: addq $0x8,%rsp ddb{0}> ddb{0}> set $lines = 0 ddb{0}> set $maxwidth = 0 ddb{0}> show panic the kernel did not panic ddb{0}> trace db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 witness_checkorder(ffffffff8391e640,9,0) at witness_checkorder+0x10fb sys/kern/subr_witness.c:-1 mtx_enter(ffffffff8391e630) at mtx_enter+0x4a sys/kern/kern_lock.c:260 sleep_setup(ffff8000299dee58,220,ffffffff833b5720) at sleep_setup+0xc6 sys/kern/kern_synch.c:302 msleep_nsec(ffff8000299dee58,ffff8000299dedf8,220,ffffffff833b5720,ffffffffffffffff) at msleep_nsec+0x119 sys/kern/kern_synch.c:217 dt_ioctl_record_stop(ffff80000147c000) at dt_ioctl_record_stop+0xbc sys/dev/dt/dt_dev.c:576 dtclose(41e5c,81,2000,ffff80003b0179c8) at dtclose+0x105 dt_pcb_purge sys/dev/dt/dt_dev.c:-1 [inline] dtclose(41e5c,81,2000,ffff80003b0179c8) at dtclose+0x105 sys/dev/dt/dt_dev.c:232 spec_close(ffff800036c02d70) at spec_close+0x45f sys/kern/spec_vnops.c:-1 VOP_CLOSE(fffffd805dab5bf0,81,fffffd80097fb680,ffff80003b0179c8) at VOP_CLOSE+0x133 sys/kern/vfs_vops.c:156 vn_closefile(fffffd806c75f018,ffff80003b0179c8) at vn_closefile+0x12b vn_close sys/kern/vfs_vnops.c:292 [inline] vn_closefile(fffffd806c75f018,ffff80003b0179c8) at vn_closefile+0x12b sys/kern/vfs_vnops.c:615 fdrop(fffffd806c75f018,ffff80003b0179c8) at fdrop+0x126 sys/kern/kern_descrip.c:1267 closef(fffffd806c75f018,ffff80003b0179c8) at closef+0x192 sys/kern/kern_descrip.c:1251 fdfree(ffff80003b0179c8) at fdfree+0x116 sys/kern/kern_descrip.c:1182 exit1(ffff80003b0179c8,0,0,1) at exit1+0x59c sys/kern/kern_exit.c:215 sys_exit(ffff80003b0179c8,ffff800036c030e0,ffff800036c03030) at sys_exit+0x1a sys/kern/kern_exit.c:-1 syscall(ffff800036c030e0) at syscall+0xb08 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff800036c030e0) at syscall+0xb08 sys/arch/amd64/amd64/trap.c:748 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f0decb742a0, count: -17 ddb{0}> show registers rdi 0 rsi 0 rbp 0xffff800036c02a70 rbx 0xfffffd8004709330 rdx 0 rcx 0xffff80003b0179c8 rax 0xffffffff83880ff0 cpu_info_full_primary+0x1ff0 r8 0xffff800036c02950 r9 0x8080808080808080 r10 0x4f33d41b83c2cb1c r11 0xeb18acf7107d264 r12 0 r13 0xfffffd8003f5c300 r14 0x3 r15 0xffffffff rip 0xffffffff81e0db25 db_enter+0x25 cs 0x8 rflags 0x246 rsp 0xffff800036c02a60 ss 0x10 db_enter+0x25: addq $0x8,%rsp ddb{0}> show proc PROC (syz-executor) tid=386854 pid=97681 tcnt=0 stat=onproc flags process=1008 proc=2000 runpri=32, usrpri=50, slppri=32, nice=20 wchan=0x0, wmesg=, ps_single=0xffff80003b0179c8 scnt=-1 ecnt=1 forw=0xffffffffffffffff, list=0xffff80002a2a02b0,0xffff80003b017228 process=0xffff80003b019880 user=0xffff800036bfe000, vmspace=0xfffffd800b027d58 estcpu=36, cpticks=2, pctcpu=0.0, user=0, sys=0, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND 24483 337740 7198 0 2 0 syz-executor 50133 319294 97470 0 2 0 syz-executor 50133 209141 97470 0 3 0x4000080 sbwait syz-executor 41594 492593 96180 0 2 0 syz-executor 41594 363585 96180 0 2 0x4000000 syz-executor 41594 401838 96180 0 3 0x4000000 inode syz-executor 41594 304302 96180 0 3 0x4000080 fsleep syz-executor 96438 308187 58062 0 2 0 syz-executor 96438 224312 58062 0 3 0x4000080 fifor syz-executor 96438 467305 58062 0 3 0x4000080 fsleep syz-executor 19997 60663 38990 0 3 0x82 nanoslp syz-executor 39813 375521 1 0 3 0x100083 ttyin getty 61144 71297 0 0 3 0x14200 bored sosplice 96180 276515 38990 0 3 0x82 nanoslp syz-executor 7198 218446 38990 0 2 0x2 syz-executor 19786 469618 38990 0 3 0x82 nanoslp syz-executor 55145 384854 38990 0 3 0x82 wait syz-executor 97470 509621 38990 0 3 0x82 nanoslp syz-executor 58062 42153 38990 0 3 0x82 nanoslp syz-executor 61299 101008 38990 0 3 0x82 wait syz-executor 38990 483189 75799 0 3 0x82 kqread syz-executor 75799 199062 79201 0 3 0x10008a sigsusp ksh 79201 523345 13798 0 3 0x98 kqread sshd-session 13798 74523 60365 0 3 0x92 kqread sshd-session 60365 292016 1 0 3 0x88 kqread sshd 96422 415705 12465 74 3 0x1100092 bpf pflogd 12465 20438 1 0 3 0x80 sbwait pflogd 30334 364095 71848 73 3 0x1100090 kqread syslogd 71848 223946 1 0 3 0x100082 sbwait syslogd 31802 435722 1 0 3 0x100080 kqread resolvd 55464 119883 17008 77 3 0x100092 kqread dhcpleased 25781 281391 17008 77 3 0x100092 kqread dhcpleased 17008 378335 1 0 3 0x80 kqread dhcpleased 69901 298584 0 0 3 0x14200 bored smr 51103 371923 0 0 3 0x14200 pgzero zerothread 55084 249181 0 0 3 0x14200 aiodoned aiodoned 86119 359557 0 0 3 0x14200 syncer update 58055 161051 0 0 3 0x14200 cleaner cleaner 6253 53901 0 0 2 0x14200 reaper 49269 8751 0 0 3 0x14200 pgdaemon pagedaemon 92307 407330 0 0 3 0x14200 bored viomb 81758 31558 0 0 3 0x40014200 acpi0 acpi0 96888 385930 0 0 3 0x40014200 idle1 89945 364951 0 0 3 0x14200 bored softnet7 45052 23097 0 0 3 0x14200 bored softnet6 59439 360564 0 0 3 0x14200 bored softnet5 90275 490405 0 0 3 0x14200 bored softnet4 88256 436313 0 0 3 0x14200 bored softnet3 16267 223602 0 0 3 0x14200 bored softnet2 27040 381422 0 0 3 0x14200 bored softnet1 6306 44358 0 0 3 0x14200 bored softnet0 91997 56173 0 0 3 0x14200 bored systqmp 87624 313224 0 0 3 0x14200 bored systq 36719 231299 0 0 3 0x14200 tmoslp softclockmp 50997 140338 0 0 3 0x40014200 tmoslp softclock 58239 149167 0 0 3 0x40014200 idle0 1 16075 0 0 3 0x82 wait init 0 0 -1 0 3 0x10010200 scheduler swapper ddb{0}> show all locks CPU 0: exclusive mutex &cq->cq_mtx r = 0 (0xffff8000299dee08) #0 witness_lock+0x5bb stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5bb sys/kern/subr_witness.c:1160 #1 mtx_enter_try+0x1ad sys/kern/kern_lock.c:311 #2 mtx_enter+0x13b sys/kern/kern_lock.c:261 #3 clockintr_unbind+0x56 sys/kern/kern_clockintr.c:375 #4 dt_ioctl_record_stop+0xbc sys/dev/dt/dt_dev.c:576 #5 dtclose+0x105 dt_pcb_purge sys/dev/dt/dt_dev.c:-1 [inline] #5 dtclose+0x105 sys/dev/dt/dt_dev.c:232 #6 spec_close+0x45f sys/kern/spec_vnops.c:-1 #7 VOP_CLOSE+0x133 sys/kern/vfs_vops.c:156 #8 vn_closefile+0x12b vn_close sys/kern/vfs_vnops.c:292 [inline] #8 vn_closefile+0x12b sys/kern/vfs_vnops.c:615 #9 fdrop+0x126 sys/kern/kern_descrip.c:1267 #10 closef+0x192 sys/kern/kern_descrip.c:1251 #11 fdfree+0x116 sys/kern/kern_descrip.c:1182 #12 exit1+0x59c sys/kern/kern_exit.c:215 #13 sys_exit+0x1a sys/kern/kern_exit.c:-1 #14 syscall+0xb08 mi_syscall sys/sys/syscall_mi.h:176 [inline] #14 syscall+0xb08 sys/arch/amd64/amd64/trap.c:748 #15 Xsyscall+0x128 CPU 1: exclusive mutex uaddr r = 0 (0xffffffff83917de8) #0 witness_lock+0x5bb stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5bb sys/kern/subr_witness.c:1160 #1 mtx_enter_try+0x1ad sys/kern/kern_lock.c:311 #2 mtx_enter+0x62 sys/kern/kern_lock.c:261 #3 pool_put+0xa6 sys/kern/subr_pool.c:796 #4 uvm_map_teardown+0x341 sys/uvm/uvm_map.c:2522 #5 exit1+0x723 sys/kern/kern_exit.c:260 #6 sys_exit+0x1a sys/kern/kern_exit.c:-1 #7 syscall+0xb08 mi_syscall sys/sys/syscall_mi.h:176 [inline] #7 syscall+0xb08 sys/arch/amd64/amd64/trap.c:748 #8 Xsyscall+0x128 Process 41594 (syz-executor) thread 0xffff80003b0167d8 (363585) exclusive rrwlock inode r = 0 (0xfffffd8073c438f0) #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+0x42b sys/kern/kern_rwlock.c:319 #2 rrw_enter+0xc6 sys/kern/kern_rwlock.c:621 #3 VOP_LOCK+0xa6 sys/kern/vfs_vops.c:527 #4 vn_lock+0xa4 sys/kern/vfs_vnops.c:570 #5 vn_write+0x190 sys/kern/vfs_vnops.c:405 #6 dofilewritev+0x23c sys/kern/sys_generic.c:380 #7 sys_write+0xa2 sys/kern/sys_generic.c:300 #8 syscall+0xbc6 mi_syscall sys/sys/syscall_mi.h:176 [inline] #8 syscall+0xbc6 sys/arch/amd64/amd64/trap.c:748 #9 Xsyscall+0x128 ddb{0}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10245 11119K 11560K 166960K 12572 0 pcb 19 14K 16K 166960K 229 0 rtable 209 7K 7K 166960K 355 0 pf 34 17K 21K 166960K 91 0 ifaddr 44 7K 8K 166960K 71 0 ifgroup 55 2K 2K 166960K 101 0 sysctl 3 1K 9K 166960K 9 0 counters 68 36K 37K 166960K 110 0 ioctlops 0 0K 4K 166960K 1554 0 iov 0 0K 20K 166960K 111 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1348 85K 85K 166960K 2013 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 2K 10K 166960K 16 0 VM map 2 1K 1K 166960K 2 0 sem 12 0K 0K 166960K 87 0 dirhash 12 2K 2K 166960K 24 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 17 61K 240K 166960K 852 0 sigio 0 0K 0K 166960K 141 0 proc 72 115K 164K 166960K 640 0 subproc 72 4K 4K 166960K 81 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 2 0K 0K 166960K 119 0 in_multi 99 7K 7K 166960K 153 0 ether_multi 1 0K 0K 166960K 6 0 mrt 1 0K 0K 166960K 8 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 253 1129K 1129K 166960K 253 0 exec 0 0K 1K 166960K 453 0 fusefs mount 1 32K 32K 166960K 1 0 tdb 3 0K 0K 166960K 3 0 VM swap 8 62K 64K 166960K 10 0 UVM amap 246 164K 170K 166960K 9421 0 UVM aobj 95 5K 5K 166960K 96 0 pinsyscall 42 84K 101K 166960K 1981 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 27 0 NDP 12 0K 2K 166960K 46 0 temp 65 8681K 8750K 166960K 40721 0 kqueue 18 23K 28K 166960K 150 0 SYN cache 2 16K 16K 166960K 2 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 80 0 77 1 0 1 1 0 8 0 rtentry 176 125 0 34 5 0 5 5 0 8 0 unpcb 144 446 0 425 5 3 2 4 0 8 1 syncache 336 4 0 4 2 1 1 1 0 8 1 tcpcb 736 204 0 196 4 0 4 4 0 8 3 arp 128 14 0 3 1 0 1 1 0 8 0 inpcb 328 915 0 899 14 7 7 7 0 8 5 nd6 144 23 0 3 1 0 1 1 0 8 0 pkpcb 40 43 0 43 2 1 1 1 0 8 1 kcovpl 48 9 0 1 1 0 1 1 0 8 0 mppekey 1024 1 0 1 1 1 0 1 0 8 0 ppxss 1192 16 0 16 2 1 1 1 0 8 1 pppxif 1504 3 0 3 1 1 0 1 0 8 0 pffrag 232 5 0 1 1 0 1 1 0 482 0 pffrnode 88 5 0 1 1 0 1 1 0 8 0 pffrent 40 6 0 2 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 pfanchor 1288 2 0 0 1 0 1 1 0 8 0 pftag 88 1 0 0 1 0 1 1 0 8 0 pfstitem 24 61 0 17 1 0 1 1 0 8 0 pfstkey 128 61 0 17 2 0 2 2 0 8 0 pfstate 384 61 0 17 5 0 5 5 0 8 0 pfrule 1344 24 0 19 2 1 1 2 0 8 0 rttmr 136 1 0 1 1 1 0 1 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 637 0 163 31 1 30 30 0 8 0 art_table 40 638 0 163 5 0 5 5 0 8 0 art_node 32 125 0 45 1 0 1 1 0 8 0 sysvmsgpl 40 28 0 19 1 0 1 1 0 8 0 semupl 112 4 0 4 1 1 0 1 0 8 0 semapl 112 85 0 75 1 0 1 1 0 8 0 shmpl 112 93 0 1 3 0 3 3 0 8 0 dirhash 1024 25 0 8 3 0 3 3 0 8 0 dino2pl 256 2913 0 1398 95 0 95 95 0 8 0 ffsino 296 2913 0 1398 117 0 117 117 0 8 0 nchpl 144 4081 0 2379 64 0 64 64 0 8 0 rtmask 32 2 0 2 2 1 1 1 0 8 1 uvmvnodes 80 3357 0 0 69 0 69 69 0 8 0 vnodes 216 3357 0 0 187 0 187 187 0 8 0 namei 1024 13815 0 13815 5 3 2 2 0 8 2 percpumem 16 70 0 21 1 0 1 1 0 8 0 kstatmem 264 58 0 32 4 1 3 3 0 8 1 scsiplug 72 7 0 7 3 2 1 1 0 8 1 scxspl 216 25590 0 25590 10 9 1 8 1 8 1 plimitpl 152 318 0 300 1 0 1 1 0 8 0 sigapl 424 1172 0 1117 9 1 8 9 0 8 0 knotepl 120 761 0 0 23 0 23 23 0 8 0 kqueuepl 224 206 0 194 1 0 1 1 0 8 0 pipepl 344 171 0 144 3 0 3 3 0 8 0 fdescpl 528 1128 0 1097 3 0 3 3 0 8 0 filepl 160 6697 0 6463 18 3 15 16 0 8 3 lockfpl 104 518 0 515 1 0 1 1 0 8 0 lockfspl 48 197 0 194 1 0 1 1 0 8 0 sessionpl 144 25 0 16 1 0 1 1 0 8 0 pgrppl 48 51 0 34 1 0 1 1 0 8 0 ucredpl 104 1132 0 1119 1 0 1 1 0 8 0 zombiepl 144 1121 0 1117 1 0 1 1 0 8 0 processpl 1248 1172 0 1117 6 1 5 6 0 8 0 procpl 656 2408 0 2344 8 1 7 8 0 8 1 sosppl 168 2 0 2 1 0 1 1 0 8 1 sockpl 752 1493 0 1453 20 9 11 11 0 8 6 mcl64k 65536 4 0 0 1 0 1 1 0 8 0 mcl16k 16384 2 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 131 0 0 17 0 17 17 0 8 0 mcl2k 2048 34 0 0 4 0 4 4 0 8 0 mtagpl 96 63 0 0 2 0 2 2 0 8 0 mbufpl 256 252 0 0 16 0 16 16 0 8 0 bufpl 280 10701 0 4559 440 0 440 440 0 8 1 anonpl 32 14309 0 0 116 0 116 116 0 246 0 amapchunkpl 152 30292 0 29787 42 12 30 31 0 158 10 amappl16 200 3899 0 3841 49 32 17 28 0 8 8 amappl15 192 3 0 3 1 1 0 1 0 8 0 amappl14 184 119 0 106 1 0 1 1 0 8 0 amappl13 176 1 0 1 1 1 0 1 0 8 0 amappl12 168 1824 0 1792 4 1 3 3 0 8 0 amappl11 160 55 0 41 1 0 1 1 0 8 0 amappl10 152 7 0 7 1 1 0 1 0 8 0 amappl9 144 258 0 258 1 1 0 1 0 8 0 amappl8 136 20 0 17 1 0 1 1 0 8 0 amappl7 128 110 0 98 1 0 1 1 0 8 0 amappl6 120 185 0 181 1 0 1 1 0 8 0 amappl5 112 128 0 118 1 0 1 1 0 8 0 amappl4 104 298 0 280 1 0 1 1 0 8 0 amappl3 96 6033 0 5916 4 0 4 4 0 8 0 amappl2 88 659 0 597 2 0 2 2 0 8 0 amappl1 80 11471 0 10868 14 1 13 14 0 8 0 amappl 88 8576 0 8404 5 0 5 5 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 128 255 0 255 3 2 1 1 0 8 1 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 19 0 18 1 0 1 1 0 8 0 aobjpl 72 95 0 1 2 0 2 2 0 8 0 uaddrrnd 24 1128 0 1097 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 1128 0 1097 1 0 1 1 0 8 0 vmmpekpl 168 10433 0 10391 3 0 3 3 0 8 0 vmmpepl 168 76169 0 74113 112 2 110 110 0 357 12 vmsppl 488 1127 0 1096 6 1 5 5 0 8 0 rwobjpl 80 25532 0 21113 95 0 95 95 0 8 1 pdppl 4096 2263 0 2192 103 32 71 83 0 8 0 pvpl 32 24128 0 0 195 0 195 195 0 265 0 pmappl 256 1127 0 1096 3 0 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 291 0 40 8 0 8 8 0 8 0 ddb{0}> machine ddbcpu 0 Invalid cpu 0 ddb{0}> trace db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 witness_checkorder(ffffffff8391e640,9,0) at witness_checkorder+0x10fb sys/kern/subr_witness.c:-1 mtx_enter(ffffffff8391e630) at mtx_enter+0x4a sys/kern/kern_lock.c:260 sleep_setup(ffff8000299dee58,220,ffffffff833b5720) at sleep_setup+0xc6 sys/kern/kern_synch.c:302 msleep_nsec(ffff8000299dee58,ffff8000299dedf8,220,ffffffff833b5720,ffffffffffffffff) at msleep_nsec+0x119 sys/kern/kern_synch.c:217 dt_ioctl_record_stop(ffff80000147c000) at dt_ioctl_record_stop+0xbc sys/dev/dt/dt_dev.c:576 dtclose(41e5c,81,2000,ffff80003b0179c8) at dtclose+0x105 dt_pcb_purge sys/dev/dt/dt_dev.c:-1 [inline] dtclose(41e5c,81,2000,ffff80003b0179c8) at dtclose+0x105 sys/dev/dt/dt_dev.c:232 spec_close(ffff800036c02d70) at spec_close+0x45f sys/kern/spec_vnops.c:-1 VOP_CLOSE(fffffd805dab5bf0,81,fffffd80097fb680,ffff80003b0179c8) at VOP_CLOSE+0x133 sys/kern/vfs_vops.c:156 vn_closefile(fffffd806c75f018,ffff80003b0179c8) at vn_closefile+0x12b vn_close sys/kern/vfs_vnops.c:292 [inline] vn_closefile(fffffd806c75f018,ffff80003b0179c8) at vn_closefile+0x12b sys/kern/vfs_vnops.c:615 fdrop(fffffd806c75f018,ffff80003b0179c8) at fdrop+0x126 sys/kern/kern_descrip.c:1267 closef(fffffd806c75f018,ffff80003b0179c8) at closef+0x192 sys/kern/kern_descrip.c:1251 fdfree(ffff80003b0179c8) at fdfree+0x116 sys/kern/kern_descrip.c:1182 exit1(ffff80003b0179c8,0,0,1) at exit1+0x59c sys/kern/kern_exit.c:215 sys_exit(ffff80003b0179c8,ffff800036c030e0,ffff800036c03030) at sys_exit+0x1a sys/kern/kern_exit.c:-1 syscall(ffff800036c030e0) at syscall+0xb08 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff800036c030e0) at syscall+0xb08 sys/arch/amd64/amd64/trap.c:748 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f0decb742a0, count: -17 ddb{0}> machine ddbcpu 1 Stopped at x86_ipi_db+0x27: addq $0x8,%rsp 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+0x44 sys/dev/kcov.c:159 clockintr_dispatch(ffff80002a2b1340) at clockintr_dispatch+0x3b4 sys/kern/kern_clockintr.c:215 lapic_clockintr(0,0) at lapic_clockintr+0x51 sys/arch/amd64/amd64/lapic.c:489 Xresume_lapic_ltimer() at Xresume_lapic_ltimer+0x2a __sanitizer_cov_trace_const_cmp4(0,1) at __sanitizer_cov_trace_const_cmp4+0x14 sys/dev/kcov.c:229 mtx_leave(ffffffff83917dd8) at mtx_leave+0x49 sys/kern/kern_lock.c:364 pool_put(ffffffff83917dd0,fffffd80097f9f00) at pool_put+0x2e0 sys/kern/subr_pool.c:811 uvm_map_teardown(fffffd805dfc2b98) at uvm_map_teardown+0x341 sys/uvm/uvm_map.c:2522 exit1(ffff80003b016a68,0,0,1) at exit1+0x723 sys/kern/kern_exit.c:260 sys_exit(ffff80003b016a68,ffff80002a2b1680,ffff80002a2b15d0) at sys_exit+0x1a sys/kern/kern_exit.c:-1 syscall(ffff80002a2b1680) at syscall+0xb08 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80002a2b1680) at syscall+0xb08 sys/arch/amd64/amd64/trap.c:748 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x72a3f20070c0, count: -15