uvm_fault(0xfffffd806c1cd5d0, 0x0, 0, 1) -> e fatal page fault in supervisor mode trap type 6 code 0 rip ffffffff82588228 cs 8 rflags 10207 cr2 0 cpl 0 rsp ffff80003c418e50 gsbase 0xffff8000299edff0 kgsbase 0x0 panic: trap type 6, code=0, pc=ffffffff82588228 Starting stack trace... panic(ffffffff833ba51c) at panic+0x1d0 sys/kern/subr_prf.c:229 kerntrap(ffff80003c418da0) at kerntrap+0x30b alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b dt_ioctl_record_stop(ffff80000149c000) at dt_ioctl_record_stop+0x108 sys/dev/dt/dt_dev.c:593 dtioctl(11e5f,80044403,ffff80003c4190e0,81,ffff80003c44b250) at dtioctl+0x536 sys/dev/dt/dt_dev.c:325 VOP_IOCTL(fffffd8060dd3138,80044403,ffff80003c4190e0,81,fffffd80097fb680,ffff80003c44b250) at VOP_IOCTL+0xac sys/kern/vfs_vops.c:264 vn_ioctl(fffffd806080f120,80044403,ffff80003c4190e0,ffff80003c44b250) at vn_ioctl+0xf8 sys/kern/vfs_vnops.c:531 sys_ioctl(ffff80003c44b250,ffff80003c4192c0,ffff80003c419210) at sys_ioctl+0x674 sys/kern/sys_generic.c:-1 syscall(ffff80003c4192c0) at syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003c4192c0) at syscall+0xbd4 sys/arch/amd64/amd64/trap.c:765 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x4b47ee4df80, count: 247 End of stack trace. WARNING: SPL NOT LOWERED ON SYSCALL 83 -1083371872 EXIT 0 4 Stopped at savectx+0xae: movl $0,%gs:0x688 TID PID UID PRFLAGS PFLAGS CPU COMMAND 332521 71046 0 0 0 0 syz-executor *292558 57898 0 0 0 1 syz-executor savectx() at savectx+0xae end of kernel end trace frame: 0x7b67716cb8e0, 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(0xfffffd806c1cd5d0, 0x0, 0, 1) -> e ddb{1}> trace savectx() at savectx+0xae end of kernel end trace frame: 0x7b67716cb8e0, count: -1 ddb{1}> show registers rdi 0 rsi 0 rbp 0xffff80003c431200 rbx 0 rdx 0 rcx 0xffff80003c44bcb0 rax 0x3c r8 0xffff80003c431130 r9 0x1 r10 0x61ac101aebfefc3b r11 0x1774ef356136ed0 r12 0 r13 0 r14 0xffff80003c44bcb0 r15 0 rip 0xffffffff8255b3ee savectx+0xae cs 0x8 rflags 0x46 rsp 0xffff80003c431180 ss 0x10 savectx+0xae: movl $0,%gs:0x688 ddb{1}> show proc PROC (syz-executor) tid=292558 pid=57898 tcnt=4 stat=onproc flags process=0 proc=0 runpri=86, usrpri=86, slppri=17, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff80003940c7e8,0xffff80003c44a568 process=0xffff80003c429d00 user=0xffff80003c42c000, vmspace=0xfffffd806c1cd5d0 estcpu=36, cpticks=7, pctcpu=0.0, user=6, sys=1, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 92558 83983 80993 0 2 0 syz-executor 71046 332521 6060 0 7 0 syz-executor 71046 226691 6060 0 2 0x4000000 syz-executor *57898 292558 8834 0 7 0 syz-executor 57898 317449 8834 0 3 0x4000080 dtread syz-executor 57898 127206 8834 0 3 0x4000080 fsleep syz-executor 57898 504139 8834 0 3 0x4000000 sbar syz-executor 11742 200569 85403 0 2 0x10 syz-executor 11742 500512 85403 0 2 0x4000010 syz-executor 11742 180915 85403 0 3 0x4000090 fsleep syz-executor 81613 382202 41541 0 2 0 syz-executor 81613 225874 41541 0 3 0x4000080 fsleep syz-executor 81613 82305 41541 0 3 0x4000080 fsleep syz-executor 6060 408291 82870 0 3 0x82 nanoslp syz-executor 16612 24937 0 0 3 0x14200 acct acct 39916 199459 1 0 3 0x100083 ttyin getty 96226 252767 82870 0 3 0x2 biowait syz-executor 48179 152731 82870 0 3 0x2 getblk syz-executor 8834 433763 82870 0 3 0x82 nanoslp syz-executor 85403 352204 82870 0 3 0x82 nanoslp syz-executor 80993 223372 82870 0 2 0x2 syz-executor 26908 201140 82870 0 3 0x82 nanoslp syz-executor 41541 160706 82870 0 3 0x82 nanoslp syz-executor 82870 523799 41248 0 3 0x82 kqread syz-executor 41248 460083 2303 0 3 0x10008a sigsusp ksh 2303 72005 90364 0 3 0x98 kqread sshd-session 90364 2353 26816 0 3 0x92 kqread sshd-session 26816 86651 1 0 3 0x88 kqread sshd 77452 298047 253 74 3 0x1100092 bpf pflogd 253 406183 1 0 3 0x80 sbwait pflogd 45659 398140 28576 73 3 0x1100090 kqread syslogd 28576 427496 1 0 3 0x100082 sbwait syslogd 44473 159792 1 0 3 0x100080 kqread resolvd 34937 102935 50380 77 3 0x100092 kqread dhcpleased 58897 38742 50380 77 3 0x100092 kqread dhcpleased 50380 157526 1 0 3 0x80 kqread dhcpleased 29784 376901 0 0 3 0x14200 bored smr 700 332940 0 0 2 0x14200 zerothread 81908 138037 0 0 3 0x14200 aiodoned aiodoned 93355 269640 0 0 3 0x14200 syncer update 52082 225906 0 0 3 0x14200 cleaner cleaner 85893 345216 0 0 3 0x14200 reaper reaper 51557 513556 0 0 3 0x14200 pgdaemon pagedaemon 39683 176577 0 0 3 0x14200 bored viomb 34315 68662 0 0 3 0x40014200 acpi0 acpi0 51186 184083 0 0 3 0x40014200 idle1 51989 201624 0 0 3 0x14200 bored softnet1 98966 401986 0 0 3 0x14200 netlock softnet0 56411 363730 0 0 2 0x40014200 systqmp 78732 395401 0 0 3 0x14200 bored systq 73850 104065 0 0 3 0x14200 tmoslp softclockmp 44207 96144 0 0 3 0x40014200 tmoslp softclock 40414 290877 0 0 3 0x40014200 idle0 1 224348 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{1}> show all locks Process 57898 (syz-executor) thread 0xffff80003c44b250 (504139) exclusive rwlock dtlk r = 0 (0xffffffff83831bc8) #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 dt_ioctl_record_stop+0x2e sys/dev/dt/dt_dev.c:572 #3 dtioctl+0x536 sys/dev/dt/dt_dev.c:325 #4 VOP_IOCTL+0xac sys/kern/vfs_vops.c:264 #5 vn_ioctl+0xf8 sys/kern/vfs_vnops.c:531 #6 sys_ioctl+0x674 sys/kern/sys_generic.c:-1 #7 syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline] #7 syscall+0xbd4 sys/arch/amd64/amd64/trap.c:765 #8 Xsyscall+0x128 exclusive kernel_lock &kernel_lock r = 0 (0xffffffff839c1a18) #0 witness_lock+0x5f1 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5f1 sys/kern/subr_witness.c:1160 #1 vn_ioctl+0x4d sys/kern/vfs_vnops.c:514 #2 sys_ioctl+0x674 sys/kern/sys_generic.c:-1 #3 syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline] #3 syscall+0xbd4 sys/arch/amd64/amd64/trap.c:765 #4 Xsyscall+0x128 Process 96226 (syz-executor) thread 0xffff8000ffff2fa8 (252767) exclusive rrwlock inode r = 0 (0xfffffd806e991540) #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:765 #11 Xsyscall+0x128 exclusive rrwlock inode r = 0 (0xfffffd806c536328) #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:765 #9 Xsyscall+0x128 Process 48179 (syz-executor) thread 0xffff8000ffff3240 (152731) exclusive rrwlock inode r = 0 (0xfffffd806e9918b8) #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:765 #11 Xsyscall+0x128 exclusive rrwlock inode r = 0 (0xfffffd806c5360d8) #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:765 #9 Xsyscall+0x128 ddb{1}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10211 11070K 11392K 166960K 12112 0 pcb 17 13K 14K 166960K 137 0 rtable 261 9K 9K 166960K 449 0 pf 38 18K 22K 166960K 242 0 ifaddr 44 8K 8K 166960K 76 0 ifgroup 55 2K 2K 166960K 119 0 sysctl 4 1K 9K 166960K 11 0 counters 68 36K 37K 166960K 134 0 ioctlops 0 0K 4K 166960K 1666 0 iov 0 0K 16K 166960K 21 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1371 86K 86K 166960K 1828 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 5K 166960K 9 0 VM map 2 1K 1K 166960K 2 0 sem 12 0K 0K 166960K 85 0 dirhash 12 2K 2K 166960K 12 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 16 57K 240K 166960K 616 0 sigio 0 0K 0K 166960K 141 0 proc 72 115K 164K 166960K 614 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 0 0K 0K 166960K 43 0 in_multi 103 7K 7K 166960K 130 0 ether_multi 1 0K 0K 166960K 7 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 79 360K 360K 166960K 79 0 exec 0 0K 1K 166960K 425 0 fusefs mount 1 32K 32K 166960K 1 0 pfkey data 0 0K 0K 166960K 1 0 tdb 3 0K 0K 166960K 3 0 VM swap 8 62K 64K 166960K 10 0 UVM amap 235 176K 190K 166960K 7506 0 UVM aobj 15 2K 2K 166960K 17 0 pinsyscall 41 82K 106K 166960K 1765 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 17 0 NDP 12 0K 2K 166960K 51 0 temp 78 8660K 8728K 166960K 23822 0 kqueue 13 20K 28K 166960K 130 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 70 0 67 1 0 1 1 0 8 0 rtentry 176 134 0 19 6 0 6 6 0 8 0 unpcb 144 305 0 288 3 1 2 2 0 8 1 syncache 336 5 0 5 2 2 0 1 0 8 0 tcpqe 32 5 0 5 1 1 0 1 0 8 0 tcpcb 736 126 0 119 4 3 1 4 0 8 0 arp 136 21 0 3 1 0 1 1 0 8 0 inpcb 328 553 0 543 7 0 7 7 0 8 5 nd6 152 29 0 3 1 0 1 1 0 8 0 pkpcb 40 7 0 7 1 0 1 1 0 8 1 kcovpl 48 9 0 1 1 0 1 1 0 8 0 ppxss 1192 26 0 26 1 0 1 1 0 8 1 pppxif 1504 2 0 2 1 0 1 1 0 8 1 pfstscr 40 4 0 4 2 1 1 1 0 8 1 pffrag 232 26 0 17 1 0 1 1 0 482 0 pffrnode 88 9 0 1 1 0 1 1 0 8 0 pffrent 40 48 0 39 1 0 1 1 0 8 0 pfosfp 40 1463 0 1037 5 0 5 5 0 8 0 pfosfpen 112 1463 0 746 21 0 21 21 0 8 0 pftag 88 2 0 0 1 0 1 1 0 8 0 pfstitem 24 66 0 13 1 0 1 1 0 8 0 pfstkey 128 74 0 22 2 0 2 2 0 8 0 pfstate 384 68 0 17 6 0 6 6 0 8 0 pfrule 1344 89 0 84 2 1 1 2 0 8 0 rttmr 136 1 0 1 1 1 0 1 0 8 0 art_heap8 4096 3 0 0 3 0 3 3 0 8 0 art_heap4 256 527 0 58 30 0 30 30 0 8 0 art_table 40 530 0 58 5 0 5 5 0 8 0 art_node 32 133 0 28 1 0 1 1 0 8 0 sysvmsgpl 40 9 0 4 1 0 1 1 0 8 0 semupl 112 1 0 1 1 1 0 1 0 8 0 semapl 112 83 0 73 1 0 1 1 0 8 0 shmpl 112 14 0 2 1 0 1 1 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 2432 0 924 96 0 96 96 0 8 0 ffsino 296 2433 0 924 117 0 117 117 0 8 0 nchpl 144 3267 0 1568 64 0 64 64 0 8 0 rtmask 32 7 0 7 1 0 1 1 0 8 1 vnodes 216 2809 0 0 157 0 157 157 0 8 0 namei 1024 10995 0 10993 1 0 1 1 0 8 0 percpumem 16 82 0 33 1 0 1 1 0 8 0 kstatmem 264 68 0 42 3 0 3 3 0 8 1 scsiplug 72 1 0 1 1 1 0 1 0 8 0 scxspl 216 15374 0 15373 10 7 3 8 1 8 2 plimitpl 152 131 0 113 1 0 1 1 0 8 0 sigapl 424 913 0 866 7 1 6 7 0 8 0 knotepl 120 542 0 0 17 0 17 17 0 8 0 kqueuepl 224 190 0 180 2 0 2 2 0 8 1 pipepl 344 227 0 198 9 6 3 9 0 8 0 fdescpl 528 896 0 866 3 0 3 3 0 8 0 filepl 160 4962 0 4735 17 4 13 16 0 8 1 lockfpl 104 286 0 283 2 1 1 2 0 8 0 lockfspl 48 72 0 69 1 0 1 1 0 8 0 sessionpl 144 25 0 16 1 0 1 1 0 8 0 pgrppl 48 38 0 21 1 0 1 1 0 8 0 ucredpl 104 637 0 622 1 0 1 1 0 8 0 zombiepl 144 867 0 866 1 0 1 1 0 8 0 processpl 1232 913 0 866 5 0 5 5 0 8 0 procpl 664 1730 0 1675 6 0 6 6 0 8 0 sosppl 176 2 0 2 1 0 1 1 0 8 1 sockpl 752 945 0 915 10 0 10 10 0 8 5 mcl64k 65536 4 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 132 0 0 17 0 17 17 0 8 0 mcl2k 2048 41 0 0 6 0 6 6 0 8 0 mtagpl 96 6 0 0 1 0 1 1 0 8 0 mbufpl 256 654 0 0 41 0 41 41 0 8 0 bufpl 280 5824 0 139 407 0 407 407 0 8 0 anonpl 32 9657 0 0 78 0 78 78 0 246 0 amapchunkpl 152 23762 0 23318 28 1 27 28 0 158 6 amappl16 200 3103 0 3069 19 3 16 16 0 8 7 amappl15 192 6 0 6 1 1 0 1 0 8 0 amappl14 184 16 0 16 1 1 0 1 0 8 0 amappl13 176 478 0 477 1 0 1 1 0 8 0 amappl12 168 1267 0 1227 3 0 3 3 0 8 0 amappl11 160 7 0 7 1 1 0 1 0 8 0 amappl10 152 49 0 35 1 0 1 1 0 8 0 amappl9 144 245 0 245 1 1 0 1 0 8 0 amappl8 136 32 0 29 1 0 1 1 0 8 0 amappl7 128 83 0 82 1 0 1 1 0 8 0 amappl6 120 312 0 299 1 0 1 1 0 8 0 amappl5 112 81 0 69 1 0 1 1 0 8 0 amappl4 104 463 0 434 1 0 1 1 0 8 0 amappl3 96 4010 0 3929 4 1 3 3 0 8 0 amappl2 88 1007 0 934 2 0 2 2 0 8 0 amappl1 80 11427 0 10841 15 0 15 15 0 8 0 amappl 88 6676 0 6522 5 0 5 5 0 92 0 uvmvnodes 80 2809 0 0 58 0 58 58 0 8 0 dma8192 8192 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 7 0 7 2 2 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 16 0 2 1 0 1 1 0 8 0 uaddrrnd 24 896 0 866 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 896 0 866 1 0 1 1 0 8 0 vmmpekpl 168 9139 0 9097 3 0 3 3 0 8 0 vmmpepl 168 64057 0 62194 98 1 97 98 0 357 6 vmsppl 488 895 0 866 5 1 4 5 0 8 0 rwobjpl 80 22647 0 18914 79 0 79 79 0 8 2 pdppl 4096 1800 0 1732 106 34 72 86 0 8 4 pvpl 32 16617 0 0 135 0 135 135 0 265 0 pmappl 256 895 0 866 3 0 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 319 0 43 8 0 8 8 0 8 0 ddb{1}> machine ddbcpu 0 Stopped at x86_ipi_db+0x27: addq $0x8,%rsp x86_ipi_db(ffffffff837acff0) 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(ffffffff839c1810) at __mp_lock+0x19e __mp_lock_spin sys/kern/kern_lock.c:134 [inline] __mp_lock(ffffffff839c1810) at __mp_lock+0x19e 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+0x33 kd_curproc sys/dev/kcov.c:585 [inline] __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x33 sys/dev/kcov.c:153 __mp_lock(ffffffff839c1810) at __mp_lock+0x1a3 __mp_lock_spin sys/kern/kern_lock.c:134 [inline] __mp_lock(ffffffff839c1810) at __mp_lock+0x1a3 sys/kern/kern_lock.c:165 intr_handler(ffff80002a3488f0,ffff80000007aa80) at intr_handler+0xe9 sys/arch/amd64/amd64/intr.c:559 Xintr_ioapic_edge23_untramp() at Xintr_ioapic_edge23_untramp+0x18f end of kernel end trace frame: 0x7b4aeab58c70, count: 4 ddb{0}> trace x86_ipi_db(ffffffff837acff0) 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(ffffffff839c1810) at __mp_lock+0x19e __mp_lock_spin sys/kern/kern_lock.c:134 [inline] __mp_lock(ffffffff839c1810) at __mp_lock+0x19e 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+0x33 kd_curproc sys/dev/kcov.c:585 [inline] __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x33 sys/dev/kcov.c:153 __mp_lock(ffffffff839c1810) at __mp_lock+0x1a3 __mp_lock_spin sys/kern/kern_lock.c:134 [inline] __mp_lock(ffffffff839c1810) at __mp_lock+0x1a3 sys/kern/kern_lock.c:165 intr_handler(ffff80002a3488f0,ffff80000007aa80) at intr_handler+0xe9 sys/arch/amd64/amd64/intr.c:559 Xintr_ioapic_edge23_untramp() at Xintr_ioapic_edge23_untramp+0x18f end of kernel end trace frame: 0x7b4aeab58c70, count: -11 ddb{0}> machine ddbcpu 1 Stopped at savectx+0xae: movl $0,%gs:0x688 savectx() at savectx+0xae end of kernel end trace frame: 0x7b67716cb8e0, count: 14 ddb{1}> trace savectx() at savectx+0xae end of kernel end trace frame: 0x7b67716cb8e0, count: -1