uvm_fault(0xfffffd806c63c9a8, 0x0, 0, 1) -> e fatal page fault in supervisor mode trap type 6 code 0 rip ffffffff81a48ec8 cs 8 rflags 10207 cr2 0 cpl 0 rsp ffff80003c4148d0 gsbase 0xffff8000299ddff0 kgsbase 0x0 panic: trap type 6, code=0, pc=ffffffff81a48ec8 Starting stack trace... panic(ffffffff833dfa76) at panic+0x1d0 sys/kern/subr_prf.c:229 kerntrap(ffff80003c414820) at kerntrap+0x30b alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b dt_ioctl_record_stop(ffff800001700000) at dt_ioctl_record_stop+0x108 sys/dev/dt/dt_dev.c:593 dtclose(11e5f,81,2000,ffff8000fffec7e8) at dtclose+0x109 dt_pcb_purge sys/dev/dt/dt_dev.c:-1 [inline] dtclose(11e5f,81,2000,ffff8000fffec7e8) at dtclose+0x109 sys/dev/dt/dt_dev.c:239 spec_close(ffff80003c4149d0) at spec_close+0x466 sys/kern/spec_vnops.c:-1 VOP_CLOSE(fffffd805be4b638,81,fffffd80097fd750,ffff8000fffec7e8) at VOP_CLOSE+0x132 sys/kern/vfs_vops.c:156 vn_closefile(fffffd806c950990,ffff8000fffec7e8) at vn_closefile+0x12b vn_close sys/kern/vfs_vnops.c:292 [inline] vn_closefile(fffffd806c950990,ffff8000fffec7e8) at vn_closefile+0x12b sys/kern/vfs_vnops.c:615 fdrop(fffffd806c950990,ffff8000fffec7e8) at fdrop+0x121 sys/kern/kern_descrip.c:1280 closef(fffffd806c950990,ffff8000fffec7e8) at closef+0x192 sys/kern/kern_descrip.c:1264 fdfree(ffff8000fffec7e8) at fdfree+0x116 sys/kern/kern_descrip.c:1195 exit1(ffff8000fffec7e8,0,0,1) at exit1+0x576 sys/kern/kern_exit.c:215 sys_exit(ffff8000fffec7e8,ffff80003c414d40,ffff80003c414c90) at sys_exit+0x1a sys/kern/kern_exit.c:-1 syscall(ffff80003c414d40) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003c414d40) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:775 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x72ad806ec380, 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 401754 11205 0 0 0 0 syz-executor *500264 93317 0 0x10 0 1 syz-executor proc_trampoline() at proc_trampoline+0xc7 end of kernel end trace frame: 0x7bf61cbd8f10, 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(0xfffffd806c63c9a8, 0x0, 0, 1) -> e ddb{1}> trace proc_trampoline() at proc_trampoline+0xc7 end of kernel end trace frame: 0x7bf61cbd8f10, count: -1 ddb{1}> show registers rdi 0 rsi 0 rbp 0xffff80003c41a800 rbx 0 rdx 0 rcx 0xffff80002a32fcb8 rax 0x2a r8 0xffff80003c41a730 r9 0x1 r10 0x902f8fe0d083882e r11 0x87b6310eb68545a r12 0 r13 0 r14 0 r15 0 rip 0xffffffff82dad4c7 proc_trampoline+0xc7 cs 0x8 rflags 0x246 rsp 0xffff80003c41a780 ss 0x10 proc_trampoline+0xc7: movl $0,%gs:0x688 ddb{1}> show proc PROC (syz-executor) tid=500264 pid=93317 tcnt=4 stat=onproc flags process=10 proc=0 runpri=86, usrpri=86, slppri=36, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff8000fffec7e8,0xffff800037be34f8 process=0xffff8000ffff0e88 user=0xffff80003c415000, vmspace=0xfffffd806c63c5d8 estcpu=36, cpticks=2, pctcpu=0.0, user=0, sys=2, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 11205 401754 24129 0 7 0 syz-executor *93317 500264 70875 0 7 0x10 syz-executor 93317 249938 70875 0 3 0x4000090 fsleep syz-executor 93317 507712 70875 0 3 0x4000090 fsleep syz-executor 93317 62938 70875 0 2 0x4000010 syz-executor 15901 375436 7666 60929 3 0x90 nanoslp syz-executor 15901 33848 7666 60929 3 0x4000010 biowait syz-executor 15901 201802 7666 60929 3 0x4000010 inode syz-executor 15901 102199 7666 60929 3 0x4000010 inode syz-executor 15901 224848 7666 60929 3 0x4000010 inode syz-executor 15901 370300 7666 60929 3 0x4000010 inode syz-executor 15901 494652 7666 60929 3 0x4000090 fsleep syz-executor 20094 449696 84565 0 3 0x80 nanoslp syz-executor 20094 158308 84565 0 3 0x4000080 kqsel syz-executor 20094 40649 84565 0 3 0x4000080 fsleep syz-executor 64198 403788 45329 0 3 0x80 nanoslp syz-executor 64198 190640 45329 0 3 0x4000080 kqread syz-executor 64198 401419 45329 0 3 0x4000080 fsleep syz-executor 50494 328280 1487 0 3 0x4000080 nanoslp syz-executor 50494 207328 1487 0 3 0x4000080 fifor syz-executor 50494 294607 1487 0 3 0x4000080 fsleep syz-executor 69940 446078 22102 0 3 0x3000 suspend syz-executor 69940 155012 22102 0 3 0x4081000 biowait syz-executor 13528 415333 7977 0 3 0x82 sbwait sshd-session 24129 443371 820 0 3 0x82 nanoslp syz-executor 34266 288098 7977 0 3 0x82 sbwait sshd-session 7666 134699 820 0 3 0x82 nanoslp syz-executor 84565 55691 820 0 3 0x82 nanoslp syz-executor 1487 118662 820 0 3 0x82 nanoslp syz-executor 6402 363693 0 0 3 0x14280 nfsidl nfsio 19663 14043 0 0 3 0x14280 nfsidl nfsio 72029 285819 0 0 3 0x14280 nfsidl nfsio 52172 102987 0 0 3 0x14280 nfsidl nfsio 18686 282937 0 0 3 0x14280 nfsidl nfsio 71804 464973 0 0 3 0x14280 nfsidl nfsio 9080 52494 0 0 3 0x14280 nfsidl nfsio 86419 447440 0 0 3 0x14280 nfsidl nfsio 50296 364149 0 0 3 0x14280 nfsidl nfsio 80649 442122 0 0 3 0x14280 nfsidl nfsio 1075 150166 0 0 3 0x14280 nfsidl nfsio 92608 38765 0 0 3 0x14280 nfsidl nfsio 62686 397358 0 0 3 0x14280 nfsidl nfsio 90292 121040 0 0 3 0x14280 nfsidl nfsio 43405 189648 0 0 3 0x14280 nfsidl nfsio 39155 418897 0 0 3 0x14280 nfsidl nfsio 72876 129213 0 0 3 0x14280 nfsidl nfsio 67901 466463 0 0 3 0x14280 nfsidl nfsio 82470 171041 0 0 3 0x14280 nfsidl nfsio 90886 487098 0 0 3 0x14280 nfsidl nfsio 8436 147561 7977 0 3 0x82 sbwait sshd-session 43518 204110 76818 0 3 0x100082 sbwait arp 76818 370510 1 0 3 0x10008a sigsusp sh 22102 218751 820 0 3 0x82 nanoslp syz-executor 70875 104755 820 0 3 0x82 nanoslp syz-executor 45329 86587 820 0 3 0x82 nanoslp syz-executor 49282 59596 820 0 3 0x82 nanoslp syz-executor 820 369347 8661 0 3 0x82 kqread syz-executor 8661 309944 75125 0 3 0x10008a sigsusp ksh 75125 150711 83029 0 3 0x98 kqread sshd-session 83029 96237 7977 0 3 0x92 kqread sshd-session 93984 48354 1 0 3 0x100083 ttyopn getty 7977 99301 1 0 3 0x88 kqread sshd 40689 514549 88657 74 3 0x1100092 bpf pflogd 88657 304155 1 0 3 0x80 sbwait pflogd 23461 430856 80759 73 3 0x1100090 kqread syslogd 80759 50452 1 0 3 0x100082 sbwait syslogd 89509 211905 1 0 3 0x100080 kqread resolvd 63512 523551 13874 77 3 0x100092 kqread dhcpleased 77676 182282 13874 77 3 0x100092 kqread dhcpleased 13874 272506 1 0 3 0x80 kqread dhcpleased 70984 163455 0 0 3 0x14200 bored smr 87385 123293 0 0 3 0x14200 pgzero zerothread 11647 345980 0 0 3 0x14200 aiodoned aiodoned 1579 226946 0 0 3 0x14200 syncer update 46975 327101 0 0 3 0x14200 cleaner cleaner 21929 74488 0 0 3 0x14200 reaper reaper 57170 217360 0 0 3 0x14200 pgdaemon pagedaemon 82980 171594 0 0 3 0x14200 bored viomb 40049 86066 0 0 3 0x40014200 acpi0 acpi0 88044 484890 0 0 3 0x40014200 idle1 75 31222 0 0 3 0x14200 bored softnet1 33133 430612 0 0 3 0x14200 netlock softnet0 12681 117994 0 0 2 0x40014200 systqmp 82935 188608 0 0 3 0x14200 bored systq 48022 381541 0 0 3 0x14200 tmoslp softclockmp 16944 441891 0 0 3 0x40014200 tmoslp softclock 20245 481468 0 0 3 0x40014200 idle0 1 197064 0 0 3 0x82 wait init 0 0 -1 0 3 0x10010200 scheduler swapper ddb{1}> show all locks Process 15901 (syz-executor) thread 0xffff8000fffeca80 (33848) exclusive rrwlock inode r = 0 (0xfffffd806e81f6d0) #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+0xbd 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:775 #9 Xsyscall+0x128 Process 15901 (syz-executor) thread 0xffff80002a343a28 (201802) exclusive rrwlock inode r = 0 (0xfffffd806e83a478) #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+0xbd 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:775 #9 Xsyscall+0x128 Process 69940 (syz-executor) thread 0xffff8000ffffdc90 (155012) exclusive rrwlock inode r = 0 (0xfffffd806f16d808) #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+0xbd 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:775 #9 Xsyscall+0x128 ddb{1}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 11128 12226K 12392K 166960K 13630 0 pcb 17 16K 17K 166960K 509 0 rtable 238 15K 16K 166960K 725 0 pf 42 19K 81K 166960K 296 0 ifaddr 37 6K 7K 166960K 158 0 ifgroup 59 2K 2K 166960K 284 0 sysctl 4 1K 9K 166960K 13 0 counters 72 37K 38K 166960K 376 0 ioctlops 0 0K 4K 166960K 1859 0 iov 0 0K 36K 166960K 136 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1415 89K 89K 166960K 2757 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 9K 166960K 12 0 VM map 2 1K 1K 166960K 2 0 sem 14 0K 0K 166960K 79 0 dirhash 12 2K 3K 166960K 51 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 20 73K 93K 166960K 1785 0 sigio 1 0K 0K 166960K 31 0 proc 73 115K 164K 166960K 875 0 subproc 81 5K 5K 166960K 126 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 184 0 in_multi 71 5K 6K 166960K 208 0 ether_multi 1 0K 0K 166960K 16 0 mrt 1 0K 0K 166960K 27 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 277 1235K 1235K 166960K 277 0 exec 0 0K 1K 166960K 883 0 fusefs mount 1 32K 32K 166960K 1 0 pfkey data 0 0K 0K 166960K 4 0 tdb 3 0K 0K 166960K 3 0 VM swap 8 62K 64K 166960K 10 0 UVM amap 310 188K 202K 166960K 17826 0 UVM aobj 50 16K 16K 166960K 56 0 pinsyscall 52 104K 108K 166960K 3100 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 1K 166960K 157 0 NDP 13 0K 1K 166960K 119 0 temp 84 8688K 8770K 166960K 94320 0 kqueue 15 22K 31K 166960K 351 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 120 215 0 211 3 2 1 3 0 8 0 rtentry 176 198 0 121 6 0 6 6 0 8 0 unpcb 144 1281 0 1254 10 7 3 6 0 8 1 syncache 336 19 0 19 4 3 1 1 0 8 1 tcpqe 32 3 0 3 2 2 0 1 0 8 0 tcpcb 736 778 0 766 14 12 2 7 0 8 0 arp 136 31 0 18 1 0 1 1 0 8 0 inpcb 328 2300 0 2283 19 16 3 10 0 8 1 ip6q 72 1 0 1 1 1 0 1 0 8 0 ip6af 40 2 0 2 1 1 0 1 0 8 0 nd6 152 40 0 24 1 0 1 1 0 8 0 pkpcb 40 10 0 10 3 3 0 1 0 8 0 kcovpl 48 14 0 5 1 0 1 1 0 8 0 ppxss 1192 128 0 128 2 1 1 1 0 8 1 pppxif 1504 5 0 5 3 3 0 1 0 8 0 pffrag 232 20 0 7 1 0 1 1 0 482 0 pffrnode 88 19 0 6 1 0 1 1 0 8 0 pffrent 40 97 0 83 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 11 0 8 2 1 1 1 0 8 0 pfanchor 1288 8 0 2 1 0 1 1 0 8 0 pftag 88 2 0 0 1 0 1 1 0 8 0 pfrule 1360 21 0 12 1 0 1 1 0 8 0 rttmr 136 7 0 7 3 2 1 1 0 8 1 art_heap8 4096 6 0 0 6 0 6 6 0 8 0 art_heap4 256 845 0 487 32 9 23 28 0 8 0 art_table 40 851 0 487 5 0 5 5 0 8 0 art_node 32 197 0 129 1 0 1 1 0 8 0 sysvmsgpl 40 22 0 8 1 0 1 1 0 8 0 semupl 112 2 0 2 2 1 1 1 0 8 1 semapl 112 70 0 58 1 0 1 1 0 8 0 shmpl 112 46 0 5 2 0 2 2 0 8 0 dirhash 1024 43 0 26 3 0 3 3 0 8 0 dino2pl 256 4775 0 3263 96 0 96 96 0 8 0 ffsino 296 4775 0 3263 118 0 118 118 0 8 0 nchpl 144 7234 0 5521 64 0 64 64 0 8 0 rtmask 32 23 0 23 4 3 1 1 0 8 1 vnodes 216 5576 0 0 310 0 310 310 0 8 0 namei 1024 26107 0 26103 3 1 2 2 0 8 1 percpumem 16 203 0 152 1 0 1 1 0 8 0 vcpupl 3968 6 0 0 1 0 1 1 0 8 0 vmpool 848 7 0 1 1 0 1 1 0 8 0 pfiaddrpl 120 3 0 2 2 1 1 1 0 8 0 kstatmem 264 192 0 160 4 1 3 3 0 8 0 scsiplug 72 4 0 4 2 1 1 1 0 8 1 scxspl 216 62394 0 62392 24 16 8 8 1 8 7 plimitpl 152 734 0 712 1 0 1 1 0 8 0 sigapl 424 2120 0 2047 10 1 9 9 0 8 0 knotepl 120 573 0 0 17 0 17 17 0 8 0 kqueuepl 224 700 0 687 11 9 2 5 0 8 0 pipepl 344 387 0 354 9 4 5 6 0 8 2 fdescpl 528 2079 0 2042 3 0 3 3 0 8 0 filepl 160 14193 0 13929 24 10 14 18 0 8 1 lockfpl 104 673 0 671 1 0 1 1 0 8 0 lockfspl 48 273 0 271 1 0 1 1 0 8 0 sessionpl 144 41 0 29 1 0 1 1 0 8 0 pgrppl 48 73 0 52 1 0 1 1 0 8 0 ucredpl 104 2001 0 1985 1 0 1 1 0 8 0 zombiepl 144 2049 0 2047 1 0 1 1 0 8 0 processpl 1232 2120 0 2047 6 0 6 6 0 8 0 procpl 664 4950 0 4861 8 0 8 8 0 8 0 sosppl 176 15 0 15 5 4 1 1 0 8 1 sockpl 752 3870 0 3822 36 27 9 18 0 8 3 mcl64k 65536 7 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 114 0 0 15 0 15 15 0 8 0 mcl2k2 2112 1 0 0 1 0 1 1 0 8 0 mcl2k 2048 41 0 0 5 0 5 5 0 8 0 mtagpl 96 1 0 0 1 0 1 1 0 8 0 mbufpl 256 258 0 0 15 0 15 15 0 8 0 bufpl 280 27738 0 21602 439 0 439 439 0 8 0 anonpl 32 13616 0 0 110 0 110 110 0 246 0 amapchunkpl 152 61419 0 60784 60 23 37 37 0 158 11 amappl16 200 9455 0 9189 65 47 18 26 0 8 4 amappl15 192 7 0 7 1 1 0 1 0 8 0 amappl14 184 1 0 1 1 1 0 1 0 8 0 amappl13 176 484 0 482 1 0 1 1 0 8 0 amappl12 168 2503 0 2452 3 0 3 3 0 8 0 amappl11 160 15 0 14 1 0 1 1 0 8 0 amappl10 152 50 0 36 1 0 1 1 0 8 0 amappl9 144 251 0 251 1 1 0 1 0 8 0 amappl8 136 35 0 32 1 0 1 1 0 8 0 amappl7 128 99 0 97 1 0 1 1 0 8 0 amappl6 120 425 0 406 1 0 1 1 0 8 0 amappl5 112 88 0 74 1 0 1 1 0 8 0 amappl4 104 504 0 468 1 0 1 1 0 8 0 amappl3 96 10851 0 10736 5 1 4 4 0 8 0 amappl2 88 2292 0 2192 4 1 3 3 0 8 0 amappl1 80 20275 0 19396 21 1 20 20 0 8 0 amappl 88 16640 0 16434 5 0 5 5 0 92 0 uvmvnodes 80 189 0 0 4 0 4 4 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 1 1 1 0 8 1 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 20 0 19 1 0 1 1 0 8 0 aobjpl 72 55 0 6 1 0 1 1 0 8 0 uaddrrnd 24 2080 0 2043 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 2080 0 2043 1 0 1 1 0 8 0 vmmpekpl 168 18475 0 18416 3 0 3 3 0 8 0 vmmpepl 168 144011 0 141270 150 27 123 123 0 357 3 vmsppl 488 2079 0 2043 5 0 5 5 0 8 0 rwobjpl 80 42483 0 40681 46 7 39 39 0 8 2 pdppl 4096 4181 0 4094 133 46 87 88 0 8 0 pvpl 32 22567 0 0 181 0 181 181 0 265 0 pmappl 256 2086 0 2044 3 0 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 336 0 74 8 0 8 8 0 8 0 ddb{1}> machine ddbcpu 0 Stopped at x86_ipi_db+0x27: addq $0x8,%rsp x86_ipi_db(ffffffff8389cff0) 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(ffffffff83945b40) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:142 [inline] __mp_lock(ffffffff83945b40) at __mp_lock+0x192 sys/kern/kern_lock.c:173 softintr_dispatch(2) at softintr_dispatch+0x125 sys/kern/kern_softintr.c:83 dosoftint(2) at dosoftint+0x54 sys/arch/amd64/amd64/intr.c:862 Xsofttty() at Xsofttty+0x27 __mp_lock(ffffffff83945b40) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:142 [inline] __mp_lock(ffffffff83945b40) at __mp_lock+0x192 sys/kern/kern_lock.c:173 intr_handler(ffff80003c4e23b0,ffff8000002a3480) at intr_handler+0xe9 sys/arch/amd64/amd64/intr.c:560 Xintr_ioapic_edge23_untramp() at Xintr_ioapic_edge23_untramp+0x18f __mp_lock(ffffffff83945b40) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:142 [inline] __mp_lock(ffffffff83945b40) at __mp_lock+0x192 sys/kern/kern_lock.c:173 syscall(ffff80003c4e2580) at syscall+0xaf4 mi_syscall sys/sys/syscall_mi.h:175 [inline] syscall(ffff80003c4e2580) at syscall+0xaf4 sys/arch/amd64/amd64/trap.c:775 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x75971200edc0, count: 2 ddb{0}> trace x86_ipi_db(ffffffff8389cff0) 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(ffffffff83945b40) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:142 [inline] __mp_lock(ffffffff83945b40) at __mp_lock+0x192 sys/kern/kern_lock.c:173 softintr_dispatch(2) at softintr_dispatch+0x125 sys/kern/kern_softintr.c:83 dosoftint(2) at dosoftint+0x54 sys/arch/amd64/amd64/intr.c:862 Xsofttty() at Xsofttty+0x27 __mp_lock(ffffffff83945b40) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:142 [inline] __mp_lock(ffffffff83945b40) at __mp_lock+0x192 sys/kern/kern_lock.c:173 intr_handler(ffff80003c4e23b0,ffff8000002a3480) at intr_handler+0xe9 sys/arch/amd64/amd64/intr.c:560 Xintr_ioapic_edge23_untramp() at Xintr_ioapic_edge23_untramp+0x18f __mp_lock(ffffffff83945b40) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:142 [inline] __mp_lock(ffffffff83945b40) at __mp_lock+0x192 sys/kern/kern_lock.c:173 syscall(ffff80003c4e2580) at syscall+0xaf4 mi_syscall sys/sys/syscall_mi.h:175 [inline] syscall(ffff80003c4e2580) at syscall+0xaf4 sys/arch/amd64/amd64/trap.c:775 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x75971200edc0, count: -13 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: 0x7bf61cbd8f10, count: 14 ddb{1}> trace proc_trampoline() at proc_trampoline+0xc7 end of kernel end trace frame: 0x7bf61cbd8f10, count: -1