uvm_fault(0xfffffd805f98f748, 0x0, 0, 1) -> e fatal page fault in supervisor mode trap type 6 code 0 rip ffffffff81195240 cs 8 rflags 10207 cr2 0 cpl 0 rsp ffff80003c56d5b0 gsbase 0xffff800029a9bff0 kgsbase 0x0 panic: trap type 6, code=0, pc=ffffffff81195240 Starting stack trace... panic(ffffffff8331cb9d) at panic+0x1d0 sys/kern/subr_prf.c:229 kerntrap(ffff80003c56d500) at kerntrap+0x29b sys/arch/amd64/amd64/trap.c:327 alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b dt_ioctl_record_stop(ffff80000153d000) at dt_ioctl_record_stop+0xf0 sys/dev/dt/dt_dev.c:579 dtclose(11e5f,81,2000,ffff80003c566040) at dtclose+0x105 dt_pcb_purge sys/dev/dt/dt_dev.c:-1 [inline] dtclose(11e5f,81,2000,ffff80003c566040) at dtclose+0x105 sys/dev/dt/dt_dev.c:232 spec_close(ffff80003c56d6b0) at spec_close+0x45f sys/kern/spec_vnops.c:-1 VOP_CLOSE(fffffd805f686e78,81,fffffd807f7d3618,ffff80003c566040) at VOP_CLOSE+0x133 sys/kern/vfs_vops.c:156 vn_closefile(fffffd806ba9f148,ffff80003c566040) at vn_closefile+0x12b vn_close sys/kern/vfs_vnops.c:292 [inline] vn_closefile(fffffd806ba9f148,ffff80003c566040) at vn_closefile+0x12b sys/kern/vfs_vnops.c:615 fdrop(fffffd806ba9f148,ffff80003c566040) at fdrop+0x126 sys/kern/kern_descrip.c:1265 closef(fffffd806ba9f148,ffff80003c566040) at closef+0x192 sys/kern/kern_descrip.c:1249 syscall(ffff80003c56d910) at syscall+0xbc6 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003c56d910) at syscall+0xbc6 sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x9819e628bc0, count: 245 End of stack trace. WARNING: SPL NOT LOWERED ON SYSCALL 83 583140608 EXIT 0 4 Stopped at savectx+0xae: movl $0,%gs:0x680 TID PID UID PRFLAGS PFLAGS CPU COMMAND 441437 50506 0 0 0 0 syz-executor *253691 48453 60929 0x10 0 1 syz-executor savectx() at savectx+0xae end of kernel end trace frame: 0x7ab3aa7d2ff0, 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(0xfffffd805f98f748, 0x0, 0, 1) -> e ddb{1}> trace savectx() at savectx+0xae end of kernel end trace frame: 0x7ab3aa7d2ff0, count: -1 ddb{1}> show registers rdi 0 rsi 0 rbp 0xffff80003c5a9fb0 rbx 0 rdx 0 rcx 0xffff80003c567c70 rax 0x3a r8 0xffff80003c5a9ee0 r9 0x1 r10 0xc262ed3abb243ee7 r11 0x1c0ace8d0ab6067d r12 0 r13 0 r14 0xffff80003c567c70 r15 0 rip 0xffffffff811f73ee savectx+0xae cs 0x8 rflags 0x46 rsp 0xffff80003c5a9f30 ss 0x10 savectx+0xae: movl $0,%gs:0x680 ddb{1}> show proc PROC (syz-executor) tid=253691 pid=48453 tcnt=3 stat=onproc flags process=10 proc=0 runpri=86, usrpri=86, slppri=32, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff80003c5667f0,0xffff80003c566fb0 process=0xffff80003c4dd280 user=0xffff80003c5a4000, vmspace=0xfffffd805f98fad8 estcpu=36, cpticks=9, pctcpu=0.0, user=7, sys=2, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 50506 441437 57646 0 7 0 syz-executor 50506 427240 57646 0 3 0x4000080 sbwait syz-executor 80929 385155 19667 0 2 0 syz-executor 80929 33312 19667 0 2 0x4000000 syz-executor 92071 463338 19288 0 2 0 syz-executor 92071 475882 19288 0 3 0x4000000 sbar syz-executor 92071 246419 19288 0 3 0x4000080 fsleep syz-executor 92071 411449 19288 0 2 0x4000000 syz-executor *48453 253691 68067 60929 7 0x10 syz-executor 48453 2682 68067 60929 3 0x4000090 fsleep syz-executor 48453 89060 68067 60929 3 0x4000090 fsleep syz-executor 1206 53578 32106 0 2 0 syz-executor 1206 25776 32106 0 3 0x4000080 fsleep syz-executor 83433 343469 85711 0 2 0 syz-executor 83433 401346 85711 0 3 0x4000080 fsleep syz-executor 79462 26590 66330 0 2 0 syz-executor 79462 214439 66330 0 3 0x4000080 ttyout syz-executor 79462 482748 66330 0 2 0x4000000 syz-executor 79462 254295 66330 0 3 0x4000080 fsleep syz-executor 82465 372979 0 0 3 0x14200 acct acct 88149 18373 0 0 3 0x14280 nfsidl nfsio 60216 463029 0 0 3 0x14280 nfsidl nfsio 55084 503549 0 0 3 0x14280 nfsidl nfsio 43300 265216 0 0 3 0x14280 nfsidl nfsio 15156 104583 0 0 3 0x14280 nfsidl nfsio 6622 257385 0 0 3 0x14280 nfsidl nfsio 71269 256860 0 0 3 0x14280 nfsidl nfsio 38944 268002 0 0 3 0x14280 nfsidl nfsio 80455 217516 0 0 3 0x14280 nfsidl nfsio 1172 252769 0 0 3 0x14280 nfsidl nfsio 37151 301654 0 0 3 0x14280 nfsidl nfsio 2241 199807 0 0 3 0x14280 nfsidl nfsio 35615 177891 0 0 3 0x14280 nfsidl nfsio 71852 520623 0 0 3 0x14280 nfsidl nfsio 93901 279906 0 0 3 0x14280 nfsidl nfsio 78680 153712 0 0 3 0x14280 nfsidl nfsio 2973 380706 0 0 3 0x14280 nfsidl nfsio 30191 29996 0 0 3 0x14280 nfsidl nfsio 24777 506011 0 0 3 0x14280 nfsidl nfsio 9056 386368 0 0 3 0x14280 nfsidl nfsio 68649 200425 0 0 3 0x14200 bored sosplice 66330 501719 71650 0 3 0x82 nanoslp syz-executor 57646 273769 71650 0 3 0x82 nanoslp syz-executor 68067 168630 71650 0 3 0x82 nanoslp syz-executor 85711 229475 71650 0 3 0x82 nanoslp syz-executor 19288 481669 71650 0 3 0x82 nanoslp syz-executor 32106 107483 71650 0 3 0x82 nanoslp syz-executor 19667 95004 71650 0 3 0x82 nanoslp syz-executor 71618 396463 71650 0 3 0x82 wait syz-executor 71650 135682 7623 0 3 0x82 kqread syz-executor 7623 271673 438 0 3 0x10008a sigsusp ksh 438 207737 38512 0 3 0x98 kqread sshd-session 38512 269963 91087 0 3 0x92 kqread sshd-session 34935 318351 1 0 3 0x100083 ttyin getty 91087 92122 1 0 3 0x88 kqread sshd 85776 478700 32929 74 3 0x1100092 bpf pflogd 32929 274147 1 0 3 0x80 sbwait pflogd 4658 34791 40706 73 3 0x1100090 kqread syslogd 40706 242852 1 0 3 0x100082 sbwait syslogd 72938 460146 1 0 3 0x100080 kqread resolvd 38534 196294 44127 77 3 0x100092 kqread dhcpleased 59676 113774 44127 77 3 0x100092 kqread dhcpleased 44127 175774 1 0 3 0x80 kqread dhcpleased 49702 518950 0 0 3 0x14200 bored smr 43187 266401 0 0 2 0x14200 zerothread 38878 59731 0 0 3 0x14200 aiodoned aiodoned 59898 374984 0 0 3 0x14200 syncer update 45847 374197 0 0 3 0x14200 cleaner cleaner 56048 285190 0 0 3 0x14200 reaper reaper 21055 71225 0 0 3 0x14200 pgdaemon pagedaemon 39758 332989 0 0 3 0x14200 bored viomb 37749 247154 0 0 3 0x40014200 acpi0 acpi0 68637 166829 0 0 3 0x40014200 idle1 55860 223130 0 0 3 0x14200 bored softnet3 50828 218218 0 0 3 0x14200 bored softnet2 11170 276658 0 0 3 0x14200 bored softnet1 41665 240 0 0 3 0x14200 netlock softnet0 44492 59526 0 0 2 0x40014200 systqmp 90904 393428 0 0 3 0x14200 bored systq 23136 417198 0 0 3 0x14200 tmoslp softclockmp 67548 256046 0 0 3 0x40014200 tmoslp softclock 85929 323440 0 0 3 0x40014200 idle0 1 25881 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{1}> show all locks Process 80929 (syz-executor) thread 0xffff80003c5427e8 (33312) exclusive rrwlock inode r = 0 (0xfffffd806c182770) #0 witness_lock+0x5bb stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5bb sys/kern/subr_witness.c:1155 #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:524 #4 vn_lock+0xa4 sys/kern/vfs_vnops.c:570 #5 vfs_lookup+0x109 sys/kern/vfs_lookup.c:418 #6 namei+0x7aa sys/kern/vfs_lookup.c:250 #7 vn_open+0x13f sys/kern/vfs_vnops.c:140 #8 doopenat+0x32e sys/kern/vfs_syscalls.c:1139 #9 syscall+0xbc6 mi_syscall sys/sys/syscall_mi.h:176 [inline] #9 syscall+0xbc6 sys/arch/amd64/amd64/trap.c:577 #10 Xsyscall+0x128 Process 92071 (syz-executor) thread 0xffff80003c566040 (475882) exclusive rwlock dtlk r = 0 (0xffffffff837a4738) #0 witness_lock+0x5bb stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5bb sys/kern/subr_witness.c:1155 #1 rw_do_enter_write+0x3ea sys/kern/kern_rwlock.c:316 #2 dt_ioctl_record_stop+0x68 sys/dev/dt/dt_dev.c:-1 #3 dtclose+0x105 dt_pcb_purge sys/dev/dt/dt_dev.c:-1 [inline] #3 dtclose+0x105 sys/dev/dt/dt_dev.c:232 #4 spec_close+0x45f sys/kern/spec_vnops.c:-1 #5 VOP_CLOSE+0x133 sys/kern/vfs_vops.c:156 #6 vn_closefile+0x12b vn_close sys/kern/vfs_vnops.c:292 [inline] #6 vn_closefile+0x12b sys/kern/vfs_vnops.c:615 #7 fdrop+0x126 sys/kern/kern_descrip.c:1265 #8 closef+0x192 sys/kern/kern_descrip.c:1249 #9 syscall+0xbc6 mi_syscall sys/sys/syscall_mi.h:176 [inline] #9 syscall+0xbc6 sys/arch/amd64/amd64/trap.c:577 #10 Xsyscall+0x128 exclusive kernel_lock &kernel_lock r = 0 (0xffffffff838ece70) #0 witness_lock+0x5bb stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5bb sys/kern/subr_witness.c:1155 #1 vn_closefile+0x41 sys/kern/vfs_vnops.c:608 #2 fdrop+0x126 sys/kern/kern_descrip.c:1265 #3 closef+0x192 sys/kern/kern_descrip.c:1249 #4 syscall+0xbc6 mi_syscall sys/sys/syscall_mi.h:176 [inline] #4 syscall+0xbc6 sys/arch/amd64/amd64/trap.c:577 #5 Xsyscall+0x128 Process 79462 (syz-executor) thread 0xffff80003c5679e0 (482748) exclusive rwlock fdlock r = 0 (0xfffffd806bd6dc50) #0 witness_lock+0x5bb stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5bb sys/kern/subr_witness.c:1155 #1 rw_do_enter_write+0x3ea sys/kern/kern_rwlock.c:316 #2 doopenat+0x173 sys/kern/vfs_syscalls.c:-1 #3 syscall+0xbc6 mi_syscall sys/sys/syscall_mi.h:176 [inline] #3 syscall+0xbc6 sys/arch/amd64/amd64/trap.c:577 #4 Xsyscall+0x128 ddb{1}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10215 11116K 12457K 166960K 12322 0 pcb 19 14K 15K 166960K 93 0 rtable 241 10K 10K 166960K 422 0 pf 37 18K 146K 166960K 68 0 ifaddr 44 7K 8K 166960K 56 0 ifgroup 55 2K 2K 166960K 74 0 sysctl 3 1K 1K 166960K 3 0 counters 64 36K 37K 166960K 86 0 ioctlops 0 0K 4K 166960K 1530 0 iov 0 0K 28K 166960K 26 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1464 92K 92K 166960K 1872 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 10K 18K 166960K 17 0 VM map 2 1K 1K 166960K 2 0 sem 12 0K 0K 166960K 22 0 dirhash 12 2K 2K 166960K 36 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 18 65K 89K 166960K 606 0 sigio 0 0K 0K 166960K 1 0 proc 72 91K 140K 166960K 575 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 65 0 in_multi 102 7K 7K 166960K 123 0 ether_multi 1 0K 0K 166960K 6 0 mrt 0 0K 0K 166960K 3 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 127 572K 572K 166960K 127 0 exec 0 0K 1K 166960K 427 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 261 152K 169K 166960K 7347 0 UVM aobj 19 4K 4K 166960K 19 0 pinsyscall 43 86K 101K 166960K 1702 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 1K 166960K 33 0 temp 51 8682K 8752K 166960K 23781 0 kqueue 14 22K 28K 166960K 111 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 24 0 0 1 0 1 1 0 8 0 rtpcb 120 75 0 71 1 0 1 1 0 8 0 rtentry 168 119 0 14 5 0 5 5 0 8 0 unpcb 144 315 0 295 3 1 2 2 0 8 1 syncache 336 6 0 6 3 2 1 1 0 8 1 tcpqe 32 2 0 2 2 2 0 1 0 8 0 tcpcb 808 132 0 124 2 1 1 2 0 8 0 arp 120 19 0 0 1 0 1 1 0 8 0 inpcb 376 570 0 557 13 8 5 12 0 8 3 nd6 136 26 0 0 1 0 1 1 0 8 0 pkpcb 40 4 0 4 2 2 0 1 0 8 0 kcovpl 48 8 0 0 1 0 1 1 0 8 0 ppxss 1168 9 0 9 2 1 1 1 0 8 1 pppxif 1480 2 0 2 2 1 1 1 0 8 1 pfstscr 40 1 0 0 1 0 1 1 0 8 0 pffrag 232 2 0 2 1 0 1 1 0 482 1 pffrnode 88 2 0 2 1 0 1 1 0 8 1 pffrent 40 7 0 7 1 0 1 1 0 8 1 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 3 0 1 1 0 1 1 0 8 0 pfanchor 1288 1 0 0 1 0 1 1 0 8 0 pfstitem 24 48 0 13 1 0 1 1 0 8 0 pfstkey 128 50 0 15 2 0 2 2 0 8 0 pfstate 376 47 0 14 5 0 5 5 0 8 0 pfrule 1344 25 0 19 2 1 1 2 0 8 0 art_heap8 4096 3 0 0 3 0 3 3 0 8 0 art_heap4 256 505 0 53 30 1 29 29 0 8 0 art_table 32 508 0 53 4 0 4 4 0 8 0 art_node 16 118 0 24 1 0 1 1 0 8 0 sysvmsgpl 40 9 0 2 1 0 1 1 0 8 0 semupl 112 1 0 1 1 1 0 1 0 8 0 semapl 112 20 0 10 1 0 1 1 0 8 0 shmpl 112 16 0 0 1 0 1 1 0 8 0 dirhash 1024 33 0 16 3 0 3 3 0 8 0 dino2pl 256 2461 0 954 95 0 95 95 0 8 0 ffsino 280 2461 0 954 109 0 109 109 0 8 0 nchpl 144 3317 0 1629 64 0 64 64 0 8 0 rtmask 32 3 0 3 1 0 1 1 0 8 1 uvmvnodes 80 2888 0 0 59 0 59 59 0 8 0 vnodes 216 2888 0 0 161 0 161 161 0 8 0 namei 1024 11536 0 11535 2 1 1 1 0 8 0 percpumem 16 57 0 11 1 0 1 1 0 8 0 pfiaddrpl 120 1 0 0 1 0 1 1 0 8 0 kstatmem 264 34 0 10 2 0 2 2 0 8 0 acpiwqpl 32 1 0 1 1 0 1 1 1 8 1 scsiplug 72 3 0 3 2 2 0 1 0 8 0 scxspl 216 10790 0 10790 10 2 8 8 1 8 8 plimitpl 152 245 0 226 1 0 1 1 0 8 0 sigapl 424 930 0 858 10 1 9 9 0 8 0 futexpl 64 7151 0 7145 1 0 1 1 0 8 0 knotepl 120 819 0 0 25 0 25 25 0 8 0 kqueuepl 216 221 0 207 3 2 1 3 0 8 0 pipepl 328 136 0 109 3 0 3 3 0 8 0 fdescpl 504 890 0 858 5 0 5 5 0 8 0 filepl 152 5013 0 4781 18 6 12 16 0 8 3 lockfpl 104 141 0 139 1 0 1 1 0 8 0 lockfspl 48 62 0 60 1 0 1 1 0 8 0 sessionpl 144 25 0 16 1 0 1 1 0 8 0 pgrppl 48 45 0 28 1 0 1 1 0 8 0 ucredpl 104 673 0 658 1 0 1 1 0 8 0 zombiepl 144 1058 0 1057 1 0 1 1 0 8 0 processpl 1176 930 0 858 6 0 6 6 0 8 0 procpl 656 1798 0 1714 9 1 8 8 0 8 0 srpgc 96 3 0 3 1 1 0 1 0 8 0 sosppl 168 9 0 9 1 0 1 1 0 8 1 sockpl 688 1034 0 997 13 5 8 13 0 8 4 mcl64k 65536 3 0 0 1 0 1 1 0 8 0 mcl16k 16384 2 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 130 0 0 17 0 17 17 0 8 0 mcl2k 2048 21 0 0 3 0 3 3 0 8 0 mtagpl 96 14 0 0 1 0 1 1 0 8 0 mbufpl 256 205 0 0 12 0 12 12 0 8 0 bufpl 280 4426 0 126 308 0 308 308 0 8 0 anonpl 24 156189 0 152679 62 3 59 59 0 184 28 amapchunkpl 152 23710 0 23144 35 4 31 34 0 158 8 amappl16 200 2739 0 2705 18 4 14 15 0 8 8 amappl15 192 4 0 4 1 1 0 1 0 8 0 amappl14 184 115 0 103 1 0 1 1 0 8 0 amappl13 176 9 0 9 1 1 0 1 0 8 0 amappl12 168 1532 0 1500 3 1 2 2 0 8 0 amappl11 160 54 0 40 1 0 1 1 0 8 0 amappl10 152 21 0 21 1 1 0 1 0 8 0 amappl9 144 248 0 248 1 1 0 1 0 8 0 amappl8 136 20 0 18 1 0 1 1 0 8 0 amappl7 128 111 0 97 1 0 1 1 0 8 0 amappl6 120 198 0 194 1 0 1 1 0 8 0 amappl5 112 125 0 115 1 0 1 1 0 8 0 amappl4 104 326 0 305 1 0 1 1 0 8 0 amappl3 96 4529 0 4399 5 1 4 4 0 8 0 amappl2 88 660 0 597 2 0 2 2 0 8 0 amappl1 80 10820 0 10209 15 0 15 15 0 8 0 amappl 88 6553 0 6365 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 8 0 8 2 2 0 1 0 8 0 dma128 128 253 0 253 1 1 0 1 0 8 0 dma64 64 6 0 6 1 1 0 1 0 8 0 dma32 32 8 0 8 2 1 1 1 0 8 1 dma16 16 19 0 18 1 0 1 1 0 8 0 aobjpl 72 18 0 0 1 0 1 1 0 8 0 uaddrrnd 24 890 0 858 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 890 0 858 1 0 1 1 0 8 0 vmmpekpl 168 9140 0 9105 2 0 2 2 0 8 0 vmmpepl 168 62552 0 60482 106 5 101 101 0 357 6 vmsppl 456 889 0 858 7 2 5 5 0 8 0 rwobjpl 64 21831 0 17949 64 0 64 64 0 8 0 pdppl 4096 1788 0 1716 104 30 74 84 0 8 2 pvpl 32 18264 0 0 149 1 148 148 0 265 0 pmappl 248 889 0 858 3 0 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 290 0 40 8 0 8 8 0 8 0 ddb{1}> machine ddbcpu 0 Stopped at x86_ipi_db+0x27: addq $0x8,%rsp x86_ipi_db(ffffffff8385eff0) 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(ffffffff838ecc68) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:113 [inline] __mp_lock(ffffffff838ecc68) at __mp_lock+0x192 sys/kern/kern_lock.c:144 softintr_dispatch(2) at softintr_dispatch+0x5b sys/arch/amd64/amd64/softintr.c:88 Xsofttty() at Xsofttty+0x27 __mp_lock(ffffffff838ecc68) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:113 [inline] __mp_lock(ffffffff838ecc68) at __mp_lock+0x192 sys/kern/kern_lock.c:144 softintr_dispatch(0) at softintr_dispatch+0x5b sys/arch/amd64/amd64/softintr.c:88 Xsoftclock() at Xsoftclock+0x27 end of kernel end trace frame: 0x768d9c2d25e0, count: 6 ddb{0}> trace x86_ipi_db(ffffffff8385eff0) 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(ffffffff838ecc68) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:113 [inline] __mp_lock(ffffffff838ecc68) at __mp_lock+0x192 sys/kern/kern_lock.c:144 softintr_dispatch(2) at softintr_dispatch+0x5b sys/arch/amd64/amd64/softintr.c:88 Xsofttty() at Xsofttty+0x27 __mp_lock(ffffffff838ecc68) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:113 [inline] __mp_lock(ffffffff838ecc68) at __mp_lock+0x192 sys/kern/kern_lock.c:144 softintr_dispatch(0) at softintr_dispatch+0x5b sys/arch/amd64/amd64/softintr.c:88 Xsoftclock() at Xsoftclock+0x27 end of kernel end trace frame: 0x768d9c2d25e0, count: -9 ddb{0}> machine ddbcpu 1 Stopped at savectx+0xae: movl $0,%gs:0x680 savectx() at savectx+0xae end of kernel end trace frame: 0x7ab3aa7d2ff0, count: 14 ddb{1}> trace savectx() at savectx+0xae end of kernel end trace frame: 0x7ab3aa7d2ff0, count: -1