uvm_fault(0xfffffd806bde1018, 0x0, 0, 1) -> e fatal page fault in supervisor mode trap type 6 code 0 rip ffffffff815fc868 cs 8 rflags 10207 cr2 0 cpl 0 rsp ffff80003bc1ea50 gsbase 0xffff8000299edff0 kgsbase 0x0 panic: trap type 6, code=0, pc=ffffffff815fc868 Starting stack trace... panic(ffffffff833bc770) at panic+0x1d0 sys/kern/subr_prf.c:229 kerntrap(ffff80003bc1e9a0) at kerntrap+0x30b alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b dt_ioctl_record_stop(ffff80000147e000) at dt_ioctl_record_stop+0x108 sys/dev/dt/dt_dev.c:593 dtclose(11e5f,1,2000,ffff800033fd9a10) at dtclose+0x109 dt_pcb_purge sys/dev/dt/dt_dev.c:-1 [inline] dtclose(11e5f,1,2000,ffff800033fd9a10) at dtclose+0x109 sys/dev/dt/dt_dev.c:239 spec_close(ffff80003bc1eb50) at spec_close+0x466 sys/kern/spec_vnops.c:-1 VOP_CLOSE(fffffd8077a87d98,1,fffffd80097fb5b0,ffff800033fd9a10) at VOP_CLOSE+0x132 sys/kern/vfs_vops.c:156 vn_closefile(fffffd8069ec8dd0,ffff800033fd9a10) at vn_closefile+0x12b vn_close sys/kern/vfs_vnops.c:292 [inline] vn_closefile(fffffd8069ec8dd0,ffff800033fd9a10) at vn_closefile+0x12b sys/kern/vfs_vnops.c:615 fdrop(fffffd8069ec8dd0,ffff800033fd9a10) at fdrop+0x121 sys/kern/kern_descrip.c:1280 closef(fffffd8069ec8dd0,ffff800033fd9a10) at closef+0x192 sys/kern/kern_descrip.c:1264 fdfree(ffff800033fd9a10) at fdfree+0x116 sys/kern/kern_descrip.c:1195 exit1(ffff800033fd9a10,b,0,1) at exit1+0x576 sys/kern/kern_exit.c:215 sys_exit(ffff800033fd9a10,ffff80003bc1eec0,ffff80003bc1ee10) at sys_exit+0x1a sys/kern/kern_exit.c:-1 syscall(ffff80003bc1eec0) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003bc1eec0) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:748 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7cf996f19dd0, count: 242 End of stack trace. WARNING: SPL NOT LOWERED ON TRAP EXIT 4 0 Stopped at proc_trampoline+0xc7: movl $0,%gs:0x688 TID PID UID PRFLAGS PFLAGS CPU COMMAND *213633 68451 0 0 0 1 syz-executor 456756 762 0 0x14000 0x200 0 reaper proc_trampoline() at proc_trampoline+0xc7 end of kernel end trace frame: 0x7cee9ef2c7c0, count: 14 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(0xfffffd806bde1018, 0x0, 0, 1) -> e ddb{1}> trace proc_trampoline() at proc_trampoline+0xc7 end of kernel end trace frame: 0x7cee9ef2c7c0, count: -1 ddb{1}> show registers rdi 0 rsi 0 rbp 0xffff80003a0123e0 rbx 0 rdx 0 rcx 0xffff800033fe0d20 rax 0x2a r8 0xffff80003a012310 r9 0x1 r10 0xf491a158feea03bc r11 0x4424dceafbf84980 r12 0 r13 0xffffffff82733d98 Xdoreti+0x18 r14 0 r15 0 rip 0xffffffff81ba64c7 proc_trampoline+0xc7 cs 0x8 rflags 0x246 rsp 0xffff80003a012360 ss 0x10 proc_trampoline+0xc7: movl $0,%gs:0x688 ddb{1}> show proc PROC (syz-executor) tid=213633 pid=68451 tcnt=2 stat=onproc flags process=0 proc=0 runpri=84, usrpri=85, slppri=17, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff800033fe1a18,0xffff800033fe1cc0 process=0xffff8000fffe8e90 user=0xffff80003a00d000, vmspace=0xfffffd806bde1b88 estcpu=35, cpticks=6, pctcpu=0.2, user=4, sys=2, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 49582 123036 48626 0 2 0 syz-executor 49582 515521 48626 0 3 0x4000000 biowait syz-executor 49582 405387 48626 0 3 0x4000080 fsleep syz-executor 49582 7468 48626 0 2 0x4000000 syz-executor 36125 142227 21167 0 3 0x80 nanoslp syz-executor 36125 415295 21167 0 3 0x4000080 kqpoll syz-executor 36125 300224 21167 0 3 0x4000080 fsleep syz-executor *68451 213633 5986 0 7 0 syz-executor 68451 73861 5986 0 3 0x4000080 kqpoll syz-executor 50895 125027 87746 0 3 0x80 nanoslp syz-executor 50895 481988 87746 0 3 0x4000080 fsleep syz-executor 50895 262238 87746 0 3 0x4000080 lockf syz-executor 50895 462369 87746 0 3 0x4000080 fsleep syz-executor 30625 445613 59725 0 3 0x80 nanoslp syz-executor 30625 199387 59725 0 3 0x4000080 kqread syz-executor 30625 445955 59725 0 3 0x4000080 semwait syz-executor 59725 198553 54456 0 3 0x82 nanoslp syz-executor 89067 198548 54456 0 3 0x82 nanoslp syz-executor 87657 345522 0 0 3 0x14280 nfsidl nfsio 86581 469320 1 0 3 0x100083 ttyopn getty 75312 267008 0 0 3 0x14200 bored sosplice 77147 163675 54456 0 3 0x2 biowait syz-executor 5986 47163 54456 0 3 0x82 nanoslp syz-executor 48626 306957 54456 0 3 0x82 nanoslp syz-executor 87746 357587 54456 0 3 0x82 nanoslp syz-executor 84201 251248 54456 0 3 0x82 nanoslp syz-executor 21167 301790 54456 0 3 0x82 nanoslp syz-executor 54456 45940 27942 0 3 0x82 kqread syz-executor 27942 214218 94231 0 3 0x10008a sigsusp ksh 94231 410937 55179 0 3 0x98 kqread sshd-session 55179 187510 57888 0 3 0x92 kqread sshd-session 57888 431133 1 0 3 0x88 kqread sshd 32963 406447 61329 74 3 0x1100092 bpf pflogd 61329 305740 1 0 3 0x80 sbwait pflogd 38277 488042 10110 73 3 0x1100090 kqread syslogd 10110 102742 1 0 3 0x100082 sbwait syslogd 23896 497187 1 0 3 0x100080 kqread resolvd 79370 46084 42901 77 3 0x100092 kqread dhcpleased 17983 143427 42901 77 3 0x100092 kqread dhcpleased 42901 169877 1 0 3 0x80 kqread dhcpleased 50097 450990 0 0 3 0x14200 bored smr 46294 147199 0 0 2 0x14200 zerothread 34845 379568 0 0 3 0x14200 aiodoned aiodoned 40404 127927 0 0 3 0x14200 syncer update 48729 388705 0 0 3 0x14200 cleaner cleaner 762 456756 0 0 7 0x14200 reaper 32634 330054 0 0 3 0x14200 pgdaemon pagedaemon 67177 247514 0 0 3 0x14200 bored viomb 5184 363827 0 0 3 0x40014200 acpi0 acpi0 12982 373177 0 0 3 0x40014200 idle1 80922 397165 0 0 3 0x14200 bored softnet1 21356 189927 0 0 3 0x14200 bored softnet0 65898 249297 0 0 2 0x40014200 systqmp 19048 241187 0 0 3 0x14200 bored systq 88972 516522 0 0 3 0x14200 tmoslp softclockmp 80226 259309 0 0 3 0x40014200 tmoslp softclock 43773 328598 0 0 3 0x40014200 idle0 1 519494 0 0 3 0x80082 wait init 0 0 -1 0 3 0x10010200 scheduler swapper ddb{1}> show all locks CPU 0: exclusive mutex &uvm.fpageqlock r = 0 (0xffffffff83992a70) #0 witness_lock+0x5f1 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5f1 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 uvm_pmr_freepageq+0x15c sys/uvm/uvm_pmemrange.c:1371 #4 km_free+0x36b sys/uvm/uvm_km.c:827 #5 uvm_uarea_free+0x4f sys/uvm/uvm_glue.c:304 #6 reaper+0x1aa sys/kern/kern_exit.c:493 #7 proc_trampoline+0x10 Process 49582 (syz-executor) thread 0xffff8000ffff2d10 (515521) exclusive rrwlock inode r = 0 (0xfffffd806e21e790) #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 vn_write+0x18f sys/kern/vfs_vnops.c:405 #6 dofilewritev+0x242 sys/kern/sys_generic.c:380 #7 sys_write+0xa2 sys/kern/sys_generic.c:300 #8 syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline] #8 syscall+0xbd4 sys/arch/amd64/amd64/trap.c:748 #9 Xsyscall+0x128 Process 77147 (syz-executor) thread 0xffff8000ffff2fa8 (163675) exclusive rrwlock inode r = 0 (0xfffffd8069c34ec0) #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 vget+0x2a2 sys/kern/vfs_subr.c:687 #6 ufs_ihashget+0x185 sys/ufs/ufs/ufs_ihash.c:98 #7 ffs_vget+0x8c sys/ufs/ffs/ffs_vfsops.c:1203 #8 ufs_lookup+0x1a36 sys/ufs/ufs/ufs_lookup.c:478 #9 VOP_LOOKUP+0x6e sys/kern/vfs_vops.c:85 #10 vfs_lookup+0x93a sys/kern/vfs_lookup.c:566 #11 namei+0x7ca sys/kern/vfs_lookup.c:250 #12 dounlinkat+0xc1 sys/kern/vfs_syscalls.c:1868 #13 syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] #13 syscall+0xb17 sys/arch/amd64/amd64/trap.c:748 #14 Xsyscall+0x128 exclusive rrwlock inode r = 0 (0xfffffd806c8820d8) #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 dounlinkat+0xc1 sys/kern/vfs_syscalls.c:1868 #8 syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] #8 syscall+0xb17 sys/arch/amd64/amd64/trap.c:748 #9 Xsyscall+0x128 ddb{1}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10238 11074K 11783K 166960K 13168 0 pcb 17 16K 18K 166960K 340 0 rtable 278 13K 14K 166960K 659 0 pf 37 18K 67485K 166960K 225 0 ifaddr 45 8K 8K 166960K 126 0 ifgroup 55 2K 2K 166960K 206 0 sysctl 3 1K 9K 166960K 13 0 counters 68 36K 37K 166960K 286 0 ioctlops 0 0K 4K 166960K 1856 0 iov 0 0K 16K 166960K 82 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1490 94K 94K 166960K 2758 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 616K 620K 166960K 22 0 VM map 2 1K 1K 166960K 2 0 sem 13 1K 1K 166960K 44 0 dirhash 12 2K 3K 166960K 30 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 17 61K 240K 166960K 1442 0 sigio 0 0K 0K 166960K 23 0 proc 72 115K 147K 166960K 796 0 subproc 72 4K 4K 166960K 109 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 2 0K 0K 166960K 167 0 in_multi 100 7K 7K 166960K 203 0 ether_multi 1 0K 0K 166960K 12 0 mrt 1 0K 0K 166960K 14 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 259 1155K 1155K 166960K 259 0 exec 0 0K 1K 166960K 753 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 262 160K 178K 166960K 15004 0 UVM aobj 60 2K 2K 166960K 65 0 pinsyscall 42 84K 102K 166960K 2662 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 1 0K 0K 166960K 95 0 NDP 12 0K 1K 166960K 85 0 temp 76 8655K 8734K 166960K 55494 0 kqueue 14 22K 32K 166960K 335 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 120 262 0 258 5 4 1 3 0 8 0 rtentry 176 196 0 82 6 0 6 6 0 8 0 unpcb 144 1092 0 1072 6 5 1 6 0 8 0 syncache 336 6 0 6 3 3 0 1 0 8 0 tcpcb 736 386 0 377 4 0 4 4 0 8 3 arp 136 31 0 10 1 0 1 1 0 8 0 ipq 40 1 0 1 1 1 0 1 0 8 0 ipqe 40 3 0 3 1 1 0 1 0 8 0 inpcb 328 1863 0 1846 18 10 8 8 0 8 6 nd6 152 42 0 12 2 0 2 2 0 8 0 pkpcb 40 8 0 8 3 3 0 1 0 8 0 kcovpl 48 12 0 4 1 0 1 1 0 8 0 mppekey 1024 1 0 1 1 1 0 1 0 8 0 ppxss 1192 89 0 89 2 1 1 1 0 8 1 pppxif 1504 42 0 42 2 1 1 1 0 8 1 pfstscr 40 9 0 7 2 1 1 1 0 8 0 pffrag 232 14 0 8 1 0 1 1 0 482 0 pffrnode 88 7 0 2 1 0 1 1 0 8 0 pffrent 40 24 0 18 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 7 0 7 3 3 0 1 0 8 0 pfanchor 1288 5 0 2 1 0 1 1 0 8 0 pftag 88 8 0 5 1 0 1 1 0 8 0 pfstitem 24 84 0 35 1 0 1 1 0 8 0 pfstkey 128 93 0 44 2 0 2 2 0 8 0 pfstate 384 87 0 40 5 0 5 5 0 8 0 pfrule 1344 33 0 27 2 1 1 2 0 8 0 rttmr 136 2 0 2 2 2 0 1 0 8 0 art_heap8 4096 3 0 0 3 0 3 3 0 8 0 art_heap4 256 828 0 392 34 6 28 31 0 8 0 art_table 40 831 0 392 5 0 5 5 0 8 0 art_node 32 193 0 93 1 0 1 1 0 8 0 sysvmsgpl 40 14 0 6 1 0 1 1 0 8 0 semupl 112 4 0 4 3 3 0 1 0 8 0 semapl 112 39 0 29 1 0 1 1 0 8 0 shmpl 112 62 0 5 2 0 2 2 0 8 0 dirhash 1024 29 0 12 3 0 3 3 0 8 0 dino2pl 256 4122 0 2609 96 0 96 96 0 8 0 ffsino 296 4122 0 2609 118 1 117 118 0 8 0 nchpl 144 6058 0 4342 64 0 64 64 0 8 0 rtmask 32 11 0 11 3 2 1 1 0 8 1 vnodes 216 4971 0 0 277 0 277 277 0 8 0 namei 1024 21997 0 21997 6 5 1 2 0 8 1 percpumem 16 158 0 109 1 0 1 1 0 8 0 pfiaddrpl 120 1 0 1 1 1 0 1 0 8 0 kstatmem 264 122 0 96 4 1 3 3 0 8 1 scsiplug 72 5 0 5 4 3 1 1 0 8 1 scxspl 216 45159 0 45157 10 9 1 8 1 8 0 plimitpl 152 501 0 482 1 0 1 1 0 8 0 sigapl 424 1724 0 1675 7 1 6 7 0 8 0 knotepl 120 779 0 0 24 0 24 24 0 8 0 kqueuepl 224 638 0 592 9 6 3 5 0 8 0 pipepl 344 305 0 277 9 6 3 9 0 8 0 fdescpl 528 1703 0 1672 3 0 3 3 0 8 0 filepl 160 12145 0 11875 25 9 16 20 0 8 3 lockfpl 104 501 0 497 1 0 1 1 0 8 0 lockfspl 48 186 0 183 1 0 1 1 0 8 0 sessionpl 144 30 0 21 1 0 1 1 0 8 0 pgrppl 48 92 0 75 1 0 1 1 0 8 0 ucredpl 104 2032 0 2019 1 0 1 1 0 8 0 zombiepl 144 1834 0 1832 1 0 1 1 0 8 0 processpl 1232 1724 0 1675 5 0 5 5 0 8 0 procpl 664 3949 0 3889 7 1 6 7 0 8 0 sosppl 168 7 0 7 3 3 0 1 0 8 0 sockpl 752 3260 0 3219 31 19 12 17 0 8 7 mcl64k 65536 5 0 0 1 0 1 1 0 8 0 mcl16k 16384 2 0 0 1 0 1 1 0 8 0 mcl8k 8192 3 0 0 1 0 1 1 0 8 0 mcl4k 4096 112 0 0 14 0 14 14 0 8 0 mcl2k 2048 56 0 0 6 0 6 6 0 8 0 mtagpl 96 8 0 0 1 0 1 1 0 8 0 mbufpl 256 280 0 0 17 0 17 17 0 8 0 bufpl 280 20630 0 14493 439 0 439 439 0 8 0 anonpl 32 17146 0 0 139 0 139 139 0 246 0 amapchunkpl 152 50735 0 50184 46 15 31 34 0 158 8 amappl16 200 8315 0 8271 95 77 18 41 0 8 8 amappl15 192 5 0 4 1 0 1 1 0 8 0 amappl14 184 9 0 9 4 3 1 1 0 8 1 amappl13 176 481 0 480 1 0 1 1 0 8 0 amappl12 168 2096 0 2054 3 0 3 3 0 8 0 amappl11 160 4 0 3 1 0 1 1 0 8 0 amappl10 152 81 0 66 1 0 1 1 0 8 0 amappl9 144 251 0 251 1 1 0 1 0 8 0 amappl8 136 31 0 28 1 0 1 1 0 8 0 amappl7 128 101 0 99 1 0 1 1 0 8 0 amappl6 120 329 0 316 1 0 1 1 0 8 0 amappl5 112 93 0 82 1 0 1 1 0 8 0 amappl4 104 453 0 421 1 0 1 1 0 8 0 amappl3 96 8712 0 8610 3 0 3 3 0 8 0 amappl2 88 1837 0 1761 2 0 2 2 0 8 0 amappl1 80 15344 0 14746 15 1 14 14 0 8 0 amappl 88 13954 0 13770 5 0 5 5 0 92 0 uvmvnodes 80 4971 0 0 102 0 102 102 0 8 0 dma32768 32768 1 0 1 1 1 0 1 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 8 0 8 3 3 0 1 0 8 0 dma128 128 255 0 255 3 3 0 1 0 8 0 dma64 64 7 0 7 2 2 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 64 0 5 2 0 2 2 0 8 0 uaddrrnd 24 1703 0 1672 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 1703 0 1672 1 0 1 1 0 8 0 vmmpekpl 168 15313 0 15267 3 0 3 3 0 8 0 vmmpepl 168 116149 0 114170 141 39 102 120 0 357 10 vmsppl 488 1702 0 1672 6 1 5 5 0 8 1 rwobjpl 80 39476 0 33473 129 6 123 123 0 8 0 pdppl 4096 3414 0 3344 114 42 72 84 0 8 2 pvpl 32 25107 0 0 203 0 203 203 0 265 0 pmappl 256 1702 0 1672 3 0 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 313 0 62 8 0 8 8 0 8 0 ddb{1}> machine ddbcpu 0 Stopped at x86_ipi_db+0x27: addq $0x8,%rsp x86_ipi_db(ffffffff837ecff0) 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_const_cmp4(0,0) at __sanitizer_cov_trace_const_cmp4+0x3a sys/dev/kcov.c:-1 _kernel_lock_held() at _kernel_lock_held+0x47 sys/kern/kern_lock.c:-1 msleep_nsec(ffffffff83790498,ffffffff83790460,4,ffffffff8339731e,ffffffffffffffff) at msleep_nsec+0x1a0 sys/kern/kern_synch.c:202 reaper(ffff8000ffffdc90) at reaper+0x13b sys/kern/kern_exit.c:477 end trace frame: 0x0, count: 8 ddb{0}> trace x86_ipi_db(ffffffff837ecff0) 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_const_cmp4(0,0) at __sanitizer_cov_trace_const_cmp4+0x3a sys/dev/kcov.c:-1 _kernel_lock_held() at _kernel_lock_held+0x47 sys/kern/kern_lock.c:-1 msleep_nsec(ffffffff83790498,ffffffff83790460,4,ffffffff8339731e,ffffffffffffffff) at msleep_nsec+0x1a0 sys/kern/kern_synch.c:202 reaper(ffff8000ffffdc90) at reaper+0x13b sys/kern/kern_exit.c:477 end trace frame: 0x0, count: -7 ddb{0}> machine ddbcpu 1 Stopped at proc_trampoline+0xc7: movl $0,%gs:0x688 proc_trampoline() at proc_trampoline+0xc7 end of kernel end trace frame: 0x7cee9ef2c7c0, count: 14 ddb{1}> trace proc_trampoline() at proc_trampoline+0xc7 end of kernel end trace frame: 0x7cee9ef2c7c0, count: -1