uvm_fault(0xfffffd8063e9b210, 0x0, 0, 1) -> e fatal page fault in supervisor mode trap type 6 code 0 rip ffffffff82b13c18 cs 8 rflags 10207 cr2 0 cpl 0 rsp ffff80003b802480 gsbase 0xffff8000299edff0 kgsbase 0x0 panic: trap type 6, code=0, pc=ffffffff82b13c18 Starting stack trace... panic(ffffffff833b94b5) at panic+0x1d0 sys/kern/subr_prf.c:229 kerntrap(ffff80003b8023d0) at kerntrap+0x30b alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b dt_ioctl_record_stop(ffff80000147d000) at dt_ioctl_record_stop+0x108 sys/dev/dt/dt_dev.c:593 dtclose(11e5f,81,2000,ffff80003c473a30) at dtclose+0x109 dt_pcb_purge sys/dev/dt/dt_dev.c:-1 [inline] dtclose(11e5f,81,2000,ffff80003c473a30) at dtclose+0x109 sys/dev/dt/dt_dev.c:239 spec_close(ffff80003b802580) at spec_close+0x466 sys/kern/spec_vnops.c:-1 VOP_CLOSE(fffffd805bd0be60,81,fffffd80097fb478,ffff80003c473a30) at VOP_CLOSE+0x132 sys/kern/vfs_vops.c:156 vn_closefile(fffffd805b8dead0,ffff80003c473a30) at vn_closefile+0x12b vn_close sys/kern/vfs_vnops.c:292 [inline] vn_closefile(fffffd805b8dead0,ffff80003c473a30) at vn_closefile+0x12b sys/kern/vfs_vnops.c:615 fdrop(fffffd805b8dead0,ffff80003c473a30) at fdrop+0x121 sys/kern/kern_descrip.c:1280 closef(fffffd805b8dead0,ffff80003c473a30) at closef+0x192 sys/kern/kern_descrip.c:1264 fdfree(ffff80003c473a30) at fdfree+0x116 sys/kern/kern_descrip.c:1195 exit1(ffff80003c473a30,0,0,1) at exit1+0x576 sys/kern/kern_exit.c:215 sys_exit(ffff80003c473a30,ffff80003b8028f0,ffff80003b802840) at sys_exit+0x1a sys/kern/kern_exit.c:-1 syscall(ffff80003b8028f0) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003b8028f0) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:748 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x6f8f621ea400, 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 *344480 65763 0 0 0x4000000 1 syz-executor 269397 14876 0 0 0 0 syz-executor proc_trampoline() at proc_trampoline+0xc7 end trace frame: 0x0, 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}> set $lines = 0 ddb{1}> set $maxwidth = 0 ddb{1}> show panic *cpu1: uvm_fault(0xfffffd8063e9b210, 0x0, 0, 1) -> e ddb{1}> trace proc_trampoline() at proc_trampoline+0xc7 end trace frame: 0x0, count: -1 ddb{1}> show registers rdi 0 rsi 0 rbp 0xffff80003c441fc0 rbx 0 rdx 0 rcx 0xffff80003c460d20 rax 0x2a r8 0xffff80003c441ef0 r9 0 r10 0xec07a06beeb1b110 r11 0x59f80e1cbd907e5d r12 0 r13 0 r14 0 r15 0 rip 0xffffffff820ae4c7 proc_trampoline+0xc7 cs 0x8 rflags 0x246 rsp 0xffff80003c441f40 ss 0x10 proc_trampoline+0xc7: movl $0,%gs:0x688 ddb{1}> show proc PROC (syz-executor) tid=344480 pid=65763 tcnt=2 stat=onproc flags process=0 proc=4000000 runpri=50, usrpri=50, slppri=17, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff80003c460a88,0xffff80003c461260 process=0xffff8000fffe9358 user=0xffff80003c43c000, vmspace=0xfffffd8063e9bd80 estcpu=36, cpticks=1, pctcpu=0.0, user=0, sys=1, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 65763 329780 4531 0 2 0 syz-executor *65763 344480 4531 0 7 0x4000000 syz-executor 14876 269397 8766 0 7 0 syz-executor 14876 99494 8766 0 2 0x4000000 syz-executor 70188 70504 88534 0 2 0 syz-executor 70188 9456 88534 0 3 0x4000080 fsleep syz-executor 3669 334262 13589 0 2 0 syz-executor 3669 34125 13589 0 3 0x4000080 fsleep syz-executor 57483 416760 60267 0 2 0 syz-executor 57483 266491 60267 0 3 0x4000080 fsleep syz-executor 89995 198997 77613 0 3 0x3000 suspend syz-executor 89995 211359 77613 0 2 0x4081000 syz-executor 89995 2077 77613 0 3 0x4081000 inode syz-executor 89995 507801 77613 0 3 0x4081000 inode syz-executor 95985 140909 0 0 3 0x14200 acct acct 34266 127084 59566 0 3 0x82 sbwait sshd-session 71595 349048 0 0 3 0x14200 bored sosplice 13664 122007 57875 0 3 0x82 wait syz-executor 8766 258094 57875 0 3 0x82 nanoslp syz-executor 77613 416537 57875 0 3 0x82 nanoslp syz-executor 29400 24018 57875 0 3 0x82 nanoslp syz-executor 13589 496692 57875 0 2 0x2 syz-executor 4531 1418 57875 0 3 0x82 nanoslp syz-executor 88534 280391 57875 0 3 0x82 nanoslp syz-executor 60267 520467 57875 0 3 0x82 nanoslp syz-executor 57875 91622 28643 0 3 0x82 kqread syz-executor 28643 258963 34850 0 3 0x10008a sigsusp ksh 34850 402402 36826 0 3 0x98 kqread sshd-session 36826 409344 59566 0 3 0x92 kqread sshd-session 43927 20599 1 0 3 0x100083 ttyopn getty 59566 195263 1 0 3 0x88 kqread sshd 26436 145465 38107 74 3 0x1100092 bpf pflogd 38107 395676 1 0 3 0x80 sbwait pflogd 32386 247358 55040 73 3 0x1100090 kqread syslogd 55040 456345 1 0 3 0x100082 sbwait syslogd 68468 485146 1 0 3 0x100080 kqread resolvd 22956 125513 46516 77 3 0x100092 kqread dhcpleased 96138 219275 46516 77 3 0x100092 kqread dhcpleased 46516 417125 1 0 3 0x80 kqread dhcpleased 16375 292861 0 0 3 0x14200 bored smr 77907 511804 0 0 2 0x14200 zerothread 23652 164989 0 0 3 0x14200 aiodoned aiodoned 74104 475447 0 0 3 0x14200 syncer update 17848 2382 0 0 3 0x14200 cleaner cleaner 95043 379775 0 0 2 0x14200 reaper 3264 475316 0 0 3 0x14200 pgdaemon pagedaemon 36363 464441 0 0 3 0x14200 bored viomb 64742 389551 0 0 3 0x40014200 acpi0 acpi0 17282 274833 0 0 3 0x40014200 idle1 66829 351445 0 0 3 0x14200 bored softnet1 21180 257000 0 0 3 0x14200 netlock softnet0 26153 149706 0 0 3 0x14200 smrbar systqmp 11276 53398 0 0 3 0x14200 bored systq 31565 145306 0 0 3 0x14200 tmoslp softclockmp 71755 508773 0 0 3 0x40014200 tmoslp softclock 55436 95720 0 0 3 0x40014200 idle0 1 100420 0 0 3 0x82 wait init 0 0 -1 0 3 0x10010200 scheduler swapper ddb{1}> show all locks Process 65763 (syz-executor) thread 0xffff80003c460d20 (344480) exclusive rwlock vmmaplk r = 0 (0xfffffd8063e9be80) #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_read+0x3e8 sys/kern/kern_rwlock.c:413 #2 uvmfault_lookup+0x122 sys/uvm/uvm_fault.c:1902 #3 uvm_fault_check+0x4f sys/uvm/uvm_fault.c:699 #4 uvm_fault+0x106 sys/uvm/uvm_fault.c:633 #5 upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:192 #6 usertrap+0x3c6 sys/arch/amd64/amd64/trap.c:605 #7 recall_trap+0x8 Process 14876 (syz-executor) thread 0xffff80003c461250 (99494) exclusive rwlock vmmaplk r = 0 (0xfffffd8063e9b128) #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_read+0x3e8 sys/kern/kern_rwlock.c:413 #2 uvmfault_lookup+0x122 sys/uvm/uvm_fault.c:1902 #3 uvm_fault_check+0x4f sys/uvm/uvm_fault.c:699 #4 uvm_fault+0x106 sys/uvm/uvm_fault.c:633 #5 upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:192 #6 usertrap+0x3c6 sys/arch/amd64/amd64/trap.c:605 #7 recall_trap+0x8 Process 89995 (syz-executor) thread 0xffff8000fffee2b0 (211359) exclusive rrwlock inode r = 0 (0xfffffd806e07e540) #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 89995 (syz-executor) thread 0xffff80003c472570 (2077) exclusive rrwlock inode r = 0 (0xfffffd806e17c938) #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 domknodat+0xb4 sys/kern/vfs_syscalls.c:1592 #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 Process 95043 (reaper) thread 0xffff8000ffffdc90 (379775) exclusive rwlock kmmaplk r = 0 (0xffffffff838bdb98) #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 vm_map_lock_ln+0x12e sys/uvm/uvm_map.c:5171 #3 uvm_unmap+0x7d sys/uvm/uvm_map.c:1792 #4 km_free+0x87 sys/uvm/uvm_km.c:831 #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 26153 (systqmp) thread 0xffff8000ffffe530 (149706) shared rwlock systqmp r = 0 (0xffffffff837ffc58) #0 witness_lock+0x5f1 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5f1 sys/kern/subr_witness.c:1160 #1 taskq_thread+0x12a sys/kern/kern_task.c:442 #2 proc_trampoline+0x10 ddb{1}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10209 11051K 11358K 166960K 11796 0 pcb 19 13K 28K 166960K 384 0 rtable 232 10K 11K 166960K 459 0 pf 34 17K 67485K 166960K 107 0 ifaddr 41 7K 8K 166960K 79 0 ifgroup 55 2K 2K 166960K 133 0 sysctl 4 1K 9K 166960K 11 0 counters 68 36K 38K 166960K 138 0 ioctlops 0 0K 4K 166960K 1732 0 iov 0 0K 24K 166960K 60 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1370 86K 86K 166960K 1989 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 5 13K 17K 166960K 20 0 VM map 2 1K 1K 166960K 2 0 sem 12 0K 0K 166960K 45 0 dirhash 12 2K 2K 166960K 39 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 18 65K 93K 166960K 962 0 sigio 0 0K 0K 166960K 79 0 proc 72 115K 180K 166960K 624 0 subproc 72 4K 4K 166960K 72 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 177 0 in_multi 85 6K 7K 166960K 140 0 ether_multi 1 0K 0K 166960K 17 0 mrt 1 0K 0K 166960K 24 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 487 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 264 180K 189K 166960K 10966 0 UVM aobj 32 2K 2K 166960K 34 0 pinsyscall 45 90K 105K 166960K 2109 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 2 0K 0K 166960K 49 0 NDP 12 0K 2K 166960K 53 0 temp 70 8654K 8722K 166960K 54050 0 kqueue 14 22K 28K 166960K 209 0 SYN cache 2 8K 16K 166960K 3 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 99 0 95 1 0 1 1 0 8 0 rtentry 176 140 0 42 6 0 6 6 0 8 0 unpcb 144 766 0 747 7 1 6 6 0 8 4 syncache 336 9 0 9 3 3 0 1 0 8 0 tcpcb 736 422 0 414 9 7 2 7 0 8 1 arp 136 23 0 4 1 0 1 1 0 8 0 inpcb 328 1136 0 1122 9 1 8 8 0 8 6 nd6 152 31 0 5 2 0 2 2 0 8 0 pkpcb 40 3 0 3 1 1 0 1 0 8 0 kcovpl 48 8 0 0 1 0 1 1 0 8 0 ppxss 1192 24 0 24 3 2 1 1 0 8 1 pppxif 1504 4 0 4 2 2 0 1 0 8 0 pffrag 232 9 0 0 1 0 1 1 0 482 0 pffrnode 88 8 0 0 1 0 1 1 0 8 0 pffrent 40 12 0 3 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 pfstitem 24 71 0 29 1 0 1 1 0 8 0 pfstkey 128 71 0 29 2 0 2 2 0 8 0 pfstate 384 71 0 29 6 1 5 5 0 8 0 pfrule 1344 21 0 16 2 1 1 2 0 8 0 rttmr 136 4 0 3 3 2 1 1 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 529 0 118 30 1 29 30 0 8 1 art_table 40 530 0 118 5 0 5 5 0 8 0 art_node 32 139 0 49 1 0 1 1 0 8 0 sysvmsgpl 40 46 0 9 2 1 1 1 0 8 0 semapl 112 41 0 31 1 0 1 1 0 8 0 shmpl 112 31 0 2 1 0 1 1 0 8 0 dirhash 1024 35 0 18 3 0 3 3 0 8 0 dino2pl 256 3203 0 1693 96 0 96 96 0 8 0 ffsino 296 3203 0 1693 117 0 117 117 0 8 0 nchpl 144 4584 0 2883 64 0 64 64 0 8 0 rtmask 32 5 0 5 1 1 0 1 0 8 0 vnodes 216 3567 0 0 199 0 199 199 0 8 0 namei 1024 15602 0 15600 5 4 1 2 0 8 0 percpumem 16 84 0 35 1 0 1 1 0 8 0 kstatmem 264 74 0 48 3 1 2 3 0 8 0 scsiplug 72 4 0 4 2 1 1 1 0 8 1 scxspl 216 28395 0 28395 12 9 3 8 1 8 3 plimitpl 152 289 0 271 1 0 1 1 0 8 0 sigapl 424 1302 0 1251 9 2 7 8 0 8 0 knotepl 120 534 0 0 17 0 17 17 0 8 0 kqueuepl 224 420 0 410 7 6 1 5 0 8 0 pipepl 344 258 0 230 9 6 3 6 0 8 0 fdescpl 528 1259 0 1226 3 0 3 3 0 8 0 filepl 160 8396 0 8163 26 6 20 20 0 8 7 lockfpl 104 462 0 460 2 0 2 2 0 8 1 lockfspl 48 128 0 126 1 0 1 1 0 8 0 sessionpl 144 26 0 16 1 0 1 1 0 8 0 pgrppl 48 49 0 31 1 0 1 1 0 8 0 ucredpl 104 1195 0 1182 1 0 1 1 0 8 0 zombiepl 144 1688 0 1685 2 1 1 1 0 8 0 processpl 1232 1302 0 1251 6 0 6 6 0 8 0 procpl 664 2818 0 2758 9 3 6 8 0 8 0 sosppl 168 11 0 11 3 2 1 1 0 8 1 sockpl 752 2218 0 2181 27 15 12 23 0 8 7 mcl64k 65536 17 0 0 3 0 3 3 0 8 0 mcl16k 16384 5 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 2 0 0 1 0 1 1 0 8 0 mcl4k 4096 110 0 0 14 0 14 14 0 8 0 mcl2k2 2112 1 0 0 1 0 1 1 0 8 0 mcl2k 2048 35 0 0 4 0 4 4 0 8 0 mtagpl 96 3 0 0 1 0 1 1 0 8 0 mbufpl 256 1142 0 0 72 0 72 72 0 8 0 bufpl 280 12332 0 6194 439 0 439 439 0 8 0 anonpl 32 14747 0 0 119 0 119 119 0 246 0 amapchunkpl 152 36330 0 35770 41 12 29 32 0 158 4 amappl16 200 5299 0 5229 58 48 10 29 0 8 6 amappl15 192 73 0 73 1 1 0 1 0 8 0 amappl14 184 6 0 6 1 1 0 1 0 8 0 amappl13 176 426 0 425 1 0 1 1 0 8 0 amappl12 168 1632 0 1587 3 0 3 3 0 8 0 amappl11 160 4 0 4 1 1 0 1 0 8 0 amappl10 152 53 0 39 1 0 1 1 0 8 0 amappl9 144 245 0 245 1 1 0 1 0 8 0 amappl8 136 25 0 22 1 0 1 1 0 8 0 amappl7 128 75 0 74 1 0 1 1 0 8 0 amappl6 120 284 0 269 1 0 1 1 0 8 0 amappl5 112 100 0 88 1 0 1 1 0 8 0 amappl4 104 443 0 410 1 0 1 1 0 8 0 amappl3 96 6349 0 6252 4 1 3 3 0 8 0 amappl2 88 1426 0 1341 3 1 2 3 0 8 0 amappl1 80 13485 0 12809 16 0 16 16 0 8 0 amappl 88 10052 0 9875 5 0 5 5 0 92 0 uvmvnodes 80 3567 0 0 73 0 73 73 0 8 0 dma16384 16384 1 0 1 1 1 0 1 0 8 0 dma4096 4096 1 0 1 1 1 0 1 0 8 0 dma2048 2048 1 0 1 1 1 0 1 0 8 0 dma1024 1024 2 0 1 1 0 1 1 0 8 0 dma512 512 1 0 1 1 1 0 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 39 0 39 2 1 1 1 0 8 1 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 33 0 2 1 0 1 1 0 8 0 uaddrrnd 24 1259 0 1226 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 1259 0 1226 1 0 1 1 0 8 0 vmmpekpl 168 12398 0 12358 3 0 3 3 0 8 0 vmmpepl 168 88078 0 85911 132 18 114 116 0 357 15 vmsppl 488 1258 0 1226 6 1 5 5 0 8 0 rwobjpl 80 30472 0 25796 98 1 97 97 0 8 0 pdppl 4096 2526 0 2452 108 34 74 86 0 8 0 pvpl 32 23734 0 0 191 0 191 191 0 265 0 pmappl 256 1258 0 1226 3 0 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 359 0 54 9 0 9 9 0 8 0 ddb{1}> machine ddbcpu 0 Stopped at x86_ipi_db+0x27: addq $0x8,%rsp x86_ipi_db(ffffffff83865ff0) 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 __mp_lock(ffffffff83896b48) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:134 [inline] __mp_lock(ffffffff83896b48) at __mp_lock+0x192 sys/kern/kern_lock.c:165 softintr_dispatch(2) at softintr_dispatch+0x125 sys/kern/kern_softintr.c:83 dosoftint(2) at dosoftint+0x54 sys/arch/amd64/amd64/intr.c:847 Xsofttty() at Xsofttty+0x27 __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc softintr_dispatch(0) at softintr_dispatch+0x125 sys/kern/kern_softintr.c:83 dosoftint(0) at dosoftint+0x54 sys/arch/amd64/amd64/intr.c:847 Xsoftclock() at Xsoftclock+0x27 end of kernel end trace frame: 0x73b9569d7700, count: 4 ddb{0}> trace x86_ipi_db(ffffffff83865ff0) 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 __mp_lock(ffffffff83896b48) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:134 [inline] __mp_lock(ffffffff83896b48) at __mp_lock+0x192 sys/kern/kern_lock.c:165 softintr_dispatch(2) at softintr_dispatch+0x125 sys/kern/kern_softintr.c:83 dosoftint(2) at dosoftint+0x54 sys/arch/amd64/amd64/intr.c:847 Xsofttty() at Xsofttty+0x27 __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc softintr_dispatch(0) at softintr_dispatch+0x125 sys/kern/kern_softintr.c:83 dosoftint(0) at dosoftint+0x54 sys/arch/amd64/amd64/intr.c:847 Xsoftclock() at Xsoftclock+0x27 end of kernel end trace frame: 0x73b9569d7700, count: -11 ddb{0}> machine ddbcpu 1 Stopped at proc_trampoline+0xc7: movl $0,%gs:0x688 proc_trampoline() at proc_trampoline+0xc7 end trace frame: 0x0, count: 14 ddb{1}> trace proc_trampoline() at proc_trampoline+0xc7 end trace frame: 0x0, count: -1