uvm_fault(0xfffffd806e04ad30, 0x0, 0, 1) -> e fatal page fault in supervisor mode trap type 6 code 0 rip ffffffff82a83cd0 cs 8 rflags 10207 cr2 0 cpl 0 rsp ffff8000347f21c0 gsbase 0xffff8000299edff0 kgsbase 0x0 panic: trap type 6, code=0, pc=ffffffff82a83cd0 Starting stack trace... panic(ffffffff8333e810) at panic+0x1d0 sys/kern/subr_prf.c:229 kerntrap(ffff8000347f2110) at kerntrap+0x29b sys/arch/amd64/amd64/trap.c:327 alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b dt_ioctl_record_stop(ffff800001570000) at dt_ioctl_record_stop+0xf0 sys/dev/dt/dt_dev.c:579 dtclose(11e5f,81,2000,ffff8000ffff19c0) at dtclose+0x105 dt_pcb_purge sys/dev/dt/dt_dev.c:-1 [inline] dtclose(11e5f,81,2000,ffff8000ffff19c0) at dtclose+0x105 sys/dev/dt/dt_dev.c:232 spec_close(ffff8000347f22c0) at spec_close+0x45f sys/kern/spec_vnops.c:-1 VOP_CLOSE(fffffd807df47018,81,fffffd807f7d2478,ffff8000ffff19c0) at VOP_CLOSE+0x133 sys/kern/vfs_vops.c:156 vn_closefile(fffffd805f019ec8,ffff8000ffff19c0) at vn_closefile+0x12b vn_close sys/kern/vfs_vnops.c:292 [inline] vn_closefile(fffffd805f019ec8,ffff8000ffff19c0) at vn_closefile+0x12b sys/kern/vfs_vnops.c:615 fdrop(fffffd805f019ec8,ffff8000ffff19c0) at fdrop+0x126 sys/kern/kern_descrip.c:1265 closef(fffffd805f019ec8,ffff8000ffff19c0) at closef+0x192 sys/kern/kern_descrip.c:1249 fdfree(ffff8000ffff19c0) at fdfree+0x116 sys/kern/kern_descrip.c:1181 exit1(ffff8000ffff19c0,0,0,1) at exit1+0x58f sys/kern/kern_exit.c:214 sys_exit(ffff8000ffff19c0,ffff8000347f2630,ffff8000347f2580) at sys_exit+0x1a sys/kern/kern_exit.c:-1 syscall(ffff8000347f2630) at syscall+0xb08 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff8000347f2630) at syscall+0xb08 sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7af0a099f050, count: 242 End of stack trace. WARNING: SPL NOT LOWERED ON TRAP EXIT 4 0 Stopped at proc_trampoline+0xc7: movl $0,%gs:0x680 TID PID UID PRFLAGS PFLAGS CPU COMMAND *304079 51971 0 0 0 1 syz-executor 244213 7583 0 0 0x4000000 0 syz-executor proc_trampoline() at proc_trampoline+0xc7 end of kernel end trace frame: 0x77e694949ab0, 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(0xfffffd806e04ad30, 0x0, 0, 1) -> e ddb{1}> trace proc_trampoline() at proc_trampoline+0xc7 end of kernel end trace frame: 0x77e694949ab0, count: -1 ddb{1}> show registers rdi 0 rsi 0 rbp 0xffff80003c455020 rbx 0 rdx 0 rcx 0xffff8000fffe79c8 rax 0x2a r8 0xffff80003c454f50 r9 0x1 r10 0x6d10ed1e757cc536 r11 0x57567c10b00e8e06 r12 0 r13 0 r14 0 r15 0 rip 0xffffffff81a0b4c7 proc_trampoline+0xc7 cs 0x8 rflags 0x246 rsp 0xffff80003c454fa0 ss 0x10 proc_trampoline+0xc7: movl $0,%gs:0x680 ddb{1}> show proc PROC (syz-executor) tid=304079 pid=51971 tcnt=1 stat=onproc flags process=0 proc=0 runpri=84, usrpri=84, slppri=17, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff8000fffe74a8,0xffff8000fffe6038 process=0xffff8000fffe84c8 user=0xffff80003c450000, vmspace=0xfffffd807ca67d48 estcpu=34, cpticks=0, pctcpu=0.0, user=0, sys=0, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 89188 208528 2292 0 2 0 syz-executor *51971 304079 91844 0 7 0 syz-executor 59384 220009 72878 0 2 0 syz-executor 59384 19454 72878 0 3 0x4000080 fsleep syz-executor 65166 56449 14725 0 2 0 syz-executor 65166 441200 14725 0 3 0x4000080 fsleep syz-executor 7583 423010 6083 0 2 0 syz-executor 7583 514901 6083 0 3 0x4000000 inode syz-executor 7583 63418 6083 0 3 0x4000080 ttyin syz-executor 7583 144982 6083 0 3 0x4000080 fsleep syz-executor 7583 244213 6083 0 7 0x4000000 syz-executor 19934 192080 74502 0 2 0 syz-executor 19934 496909 74502 0 3 0x4000080 fsleep syz-executor 27998 278962 34159 0 3 0x80 nanoslp syz-executor 27998 273750 34159 0 3 0x4000080 fsleep syz-executor 27998 231165 34159 0 3 0x4000080 fifor syz-executor 27998 219361 34159 0 3 0x4000080 fsleep syz-executor 44784 286384 0 0 3 0x14200 acct acct 91844 281926 48050 0 3 0x82 nanoslp syz-executor 86553 340765 1 0 3 0x100083 ttyin getty 2292 269937 48050 0 3 0x82 nanoslp syz-executor 74502 396872 48050 0 3 0x82 nanoslp syz-executor 23855 360580 0 0 3 0x14200 bored sosplice 72878 186223 48050 0 2 0x2 syz-executor 6083 474232 48050 0 3 0x82 nanoslp syz-executor 14725 61229 48050 0 3 0x82 nanoslp syz-executor 55480 433289 48050 0 3 0x82 nanoslp syz-executor 34159 366662 48050 0 3 0x82 nanoslp syz-executor 48050 460141 50437 0 3 0x82 kqread syz-executor 50437 433704 28654 0 3 0x10008a sigsusp ksh 28654 345570 92441 0 3 0x98 kqread sshd-session 92441 83902 66 0 3 0x92 kqread sshd-session 66 454459 1 0 3 0x88 kqread sshd 99912 401739 55662 74 3 0x1100092 bpf pflogd 55662 494918 1 0 3 0x80 sbwait pflogd 10037 508644 69473 73 3 0x1100090 kqread syslogd 69473 409954 1 0 3 0x100082 sbwait syslogd 10937 306056 1 0 3 0x100080 kqread resolvd 96120 446623 54084 77 3 0x100092 kqread dhcpleased 5057 365258 54084 77 3 0x100092 kqread dhcpleased 54084 96160 1 0 3 0x80 kqread dhcpleased 58685 420978 0 0 3 0x14200 bored smr 16700 464945 0 0 2 0x14200 zerothread 74423 182723 0 0 3 0x14200 aiodoned aiodoned 91310 211199 0 0 3 0x14200 syncer update 40489 121683 0 0 3 0x14200 cleaner cleaner 60453 474727 0 0 3 0x14200 reaper reaper 66619 365746 0 0 3 0x14200 pgdaemon pagedaemon 56040 501776 0 0 3 0x14200 bored viomb 37505 468941 0 0 3 0x40014200 acpi0 acpi0 17059 409356 0 0 3 0x40014200 idle1 159 90506 0 0 3 0x14200 bored softnet3 85836 449387 0 0 3 0x14200 bored softnet2 9570 321717 0 0 3 0x14200 bored softnet1 99350 359455 0 0 3 0x14200 netlock softnet0 79560 295599 0 0 2 0x14200 systqmp 43511 189084 0 0 3 0x14200 bored systq 52793 313542 0 0 3 0x14200 tmoslp softclockmp 35504 58231 0 0 3 0x40014200 tmoslp softclock 55003 52624 0 0 3 0x40014200 idle0 1 487334 0 0 3 0x80082 wait init 0 0 -1 0 3 0x10010200 scheduler swapper ddb{1}> show all locks Process 7583 (syz-executor) thread 0xffff8000fffe7c58 (514901) exclusive rrwlock inode r = 0 (0xfffffd806b87fac0) #0 witness_lock+0x5bb stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5bb sys/kern/subr_witness.c:1160 #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 domknodat+0xb4 sys/kern/vfs_syscalls.c:1590 #8 syscall+0xb08 mi_syscall sys/sys/syscall_mi.h:176 [inline] #8 syscall+0xb08 sys/arch/amd64/amd64/trap.c:577 #9 Xsyscall+0x128 Process 7583 (syz-executor) thread 0xffff8000fffe6f88 (63418) exclusive rrwlock inode r = 0 (0xfffffd806dd11538) #0 witness_lock+0x5bb stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5bb sys/kern/subr_witness.c:1160 #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 spec_open+0x305 sys/kern/spec_vnops.c:151 #6 VOP_OPEN+0x8b sys/kern/vfs_vops.c:138 #7 vn_open+0x708 sys/kern/vfs_vnops.c:177 #8 vndioctl+0xcb1 sys/dev/vnd.c:457 #9 VOP_IOCTL+0xac sys/kern/vfs_vops.c:264 #10 vn_ioctl+0xf8 sys/kern/vfs_vnops.c:531 #11 sys_ioctl+0x5c3 sys/kern/sys_generic.c:-1 #12 syscall+0xbc6 mi_syscall sys/sys/syscall_mi.h:176 [inline] #12 syscall+0xbc6 sys/arch/amd64/amd64/trap.c:577 #13 Xsyscall+0x128 ddb{1}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10246 11071K 12418K 166960K 14562 0 pcb 17 16K 18K 166960K 369 0 rtable 200 12K 12K 166960K 769 0 pf 44 19K 23K 166960K 206 0 ifaddr 36 5K 8K 166960K 124 0 ifgroup 66 2K 3K 166960K 210 0 sysctl 4 1K 1K 166960K 4 0 counters 68 36K 37K 166960K 358 0 ioctlops 0 0K 4K 166960K 1827 0 iov 0 0K 24K 166960K 85 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1522 96K 96K 166960K 3262 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 16K 24K 166960K 31 0 VM map 2 1K 1K 166960K 2 0 sem 26 16K 16K 166960K 148 0 dirhash 12 2K 2K 166960K 42 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 18 65K 89K 166960K 1802 0 sigio 0 0K 0K 166960K 22 0 proc 72 91K 128K 166960K 886 0 subproc 72 4K 4K 166960K 117 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 373 0 in_multi 69 5K 7K 166960K 195 0 ether_multi 1 0K 0K 166960K 5 0 mrt 0 0K 0K 166960K 9 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 283 1261K 1261K 166960K 283 0 exec 0 0K 1K 166960K 745 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 245 168K 189K 166960K 17904 0 UVM aobj 9 2K 2K 166960K 10 0 pinsyscall 43 86K 102K 166960K 3059 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 1K 166960K 96 0 NDP 14 0K 2K 166960K 87 0 temp 80 8692K 8824K 166960K 60917 0 kqueue 15 21K 32K 166960K 353 0 SYN cache 2 16K 18K 166960K 4 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 120 152 0 149 1 0 1 1 0 8 0 rtentry 176 211 0 134 6 0 6 6 0 8 0 unpcb 144 1583 0 1564 12 7 5 6 0 8 4 syncache 336 9 0 9 3 2 1 1 0 8 1 tcpcb 808 812 0 808 22 13 9 11 0 8 8 arp 128 34 0 20 1 0 1 1 0 8 0 inpcb 384 2038 0 2031 26 17 9 11 0 8 8 nd6 144 48 0 28 2 0 2 2 0 8 0 pkpcb 40 19 0 19 3 2 1 1 0 8 1 kcovpl 48 13 0 5 1 0 1 1 0 8 0 mppekey 1024 2 0 2 2 1 1 1 0 8 1 ppxss 1192 126 0 126 1 0 1 1 0 8 1 pppxif 1504 10 0 10 2 2 0 1 0 8 0 pfstscr 40 6 0 6 3 2 1 1 0 8 1 pffrag 232 7 0 1 1 0 1 1 0 482 0 pffrnode 88 7 0 1 1 0 1 1 0 8 0 pffrent 40 12 0 6 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 4 2 1 1 1 0 8 0 pfanchor 1288 3 0 0 1 0 1 1 0 8 0 pftag 88 3 0 2 2 1 1 1 0 8 0 pfstitem 24 120 0 45 1 0 1 1 0 8 0 pfstkey 128 126 0 51 3 0 3 3 0 8 0 pfstate 384 121 0 47 8 0 8 8 0 8 0 pfrule 1344 33 0 20 3 1 2 2 0 8 0 rttmr 136 1 0 1 1 1 0 1 0 8 0 art_heap8 4096 4 0 0 4 0 4 4 0 8 0 art_heap4 256 886 0 548 32 10 22 29 0 8 0 art_table 32 890 0 548 4 0 4 4 0 8 0 art_node 16 206 0 139 1 0 1 1 0 8 0 sysvmsgpl 40 20 0 10 1 0 1 1 0 8 0 semupl 112 3 0 3 2 2 0 1 0 8 0 semapl 112 143 0 119 1 0 1 1 0 8 0 shmpl 112 7 0 1 1 0 1 1 0 8 0 dirhash 1024 37 0 20 3 0 3 3 0 8 0 dino2pl 256 4700 0 3187 97 1 96 96 0 8 0 ffsino 288 4700 0 3187 109 0 109 109 0 8 0 nchpl 144 7348 0 6746 65 39 26 64 0 8 0 rtmask 32 12 0 12 4 3 1 1 0 8 1 uvmvnodes 80 5926 0 0 121 0 121 121 0 8 0 vnodes 216 5926 0 0 330 0 330 330 0 8 0 namei 1024 25334 0 25333 3 1 2 2 0 8 1 percpumem 16 194 0 145 1 0 1 1 0 8 0 pfiaddrpl 120 2 0 0 1 0 1 1 0 8 0 kstatmem 264 120 0 92 5 2 3 3 0 8 1 scsiplug 72 3 0 3 3 2 1 1 0 8 1 scxspl 216 21133 0 21133 13 11 2 8 1 8 2 plimitpl 152 552 0 535 1 0 1 1 0 8 0 sigapl 424 2107 0 2055 7 1 6 7 0 8 0 futexpl 64 25120 0 25114 1 0 1 1 0 8 0 knotepl 120 583 0 0 18 0 18 18 0 8 0 kqueuepl 224 891 0 878 9 4 5 5 0 8 4 pipepl 336 247 0 220 3 0 3 3 0 8 0 fdescpl 520 2084 0 2052 3 0 3 3 0 8 0 filepl 160 14736 0 14519 24 6 18 18 0 8 4 lockfpl 104 699 0 691 2 0 2 2 0 8 1 lockfspl 48 231 0 227 1 0 1 1 0 8 0 sessionpl 144 33 0 24 1 0 1 1 0 8 0 pgrppl 48 61 0 44 1 0 1 1 0 8 0 ucredpl 104 2308 0 2294 1 0 1 1 0 8 0 zombiepl 144 2056 0 2055 1 0 1 1 0 8 0 processpl 1192 2107 0 2055 5 0 5 5 0 8 0 procpl 656 4950 0 4888 6 0 6 6 0 8 0 srpgc 96 16 0 16 4 4 0 1 0 8 0 sosppl 168 4 0 4 3 3 0 1 0 8 0 sockpl 728 3812 0 3783 35 24 11 15 0 8 8 mcl64k 65536 7 0 0 1 0 1 1 0 8 0 mcl16k 16384 5 0 0 1 0 1 1 0 8 0 mcl12k 12288 2 0 0 1 0 1 1 0 8 0 mcl9k 9216 1 0 0 1 0 1 1 0 8 0 mcl8k 8192 4 0 0 1 0 1 1 0 8 0 mcl4k 4096 129 0 0 16 0 16 16 0 8 0 mcl2k2 2112 2 0 0 1 0 1 1 0 8 0 mcl2k 2048 37 0 0 5 0 5 5 0 8 0 mtagpl 96 135 0 0 4 0 4 4 0 8 0 mbufpl 256 300 0 0 18 0 18 18 0 8 0 bufpl 280 5438 0 149 378 0 378 378 0 8 0 anonpl 32 8338 0 0 67 0 67 67 0 246 0 amapchunkpl 152 59951 0 59408 44 15 29 29 0 158 6 amappl16 200 5006 0 4965 39 26 13 14 0 8 8 amappl15 192 5 0 5 3 3 0 1 0 8 0 amappl14 184 130 0 118 1 0 1 1 0 8 0 amappl13 176 10 0 10 1 1 0 1 0 8 0 amappl12 168 2818 0 2787 3 1 2 2 0 8 0 amappl11 160 53 0 39 1 0 1 1 0 8 0 amappl10 152 6 0 6 1 1 0 1 0 8 0 amappl9 144 251 0 251 1 1 0 1 0 8 0 amappl8 136 28 0 25 1 0 1 1 0 8 0 amappl7 128 123 0 110 1 0 1 1 0 8 0 amappl6 120 235 0 231 1 0 1 1 0 8 0 amappl5 112 146 0 136 1 0 1 1 0 8 0 amappl4 104 348 0 328 1 0 1 1 0 8 0 amappl3 96 12276 0 12164 5 1 4 4 0 8 0 amappl2 88 749 0 685 2 0 2 2 0 8 0 amappl1 80 16825 0 16225 15 0 15 15 0 8 0 amappl 88 16790 0 16618 5 0 5 5 0 92 0 dma32768 32768 1 0 1 1 1 0 1 0 8 0 dma4096 4096 2 0 2 2 2 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 128 256 0 256 4 4 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 9 0 1 1 0 1 1 0 8 0 uaddrrnd 24 2084 0 2052 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 2084 0 2052 1 0 1 1 0 8 0 vmmpekpl 168 18033 0 17988 3 0 3 3 0 8 0 vmmpepl 168 134927 0 132885 114 14 100 100 0 357 5 vmsppl 480 2083 0 2052 6 1 5 5 0 8 0 rwobjpl 72 40211 0 33336 126 0 126 126 0 8 0 pdppl 4096 4176 0 4104 124 52 72 84 0 8 0 pvpl 32 16040 0 0 129 0 129 129 0 265 0 pmappl 256 2083 0 2052 3 0 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 453 0 85 11 0 11 11 0 8 0 ddb{1}> machine ddbcpu 0 Stopped at x86_ipi_db+0x27: addq $0x8,%rsp x86_ipi_db(ffffffff837edff0) 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_pc() at __sanitizer_cov_trace_pc+0x2c kd_curproc sys/dev/kcov.c:584 [inline] __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x2c sys/dev/kcov.c:153 __mp_lock(ffffffff838f4440) at __mp_lock+0x1a3 __mp_lock_spin sys/kern/kern_lock.c:113 [inline] __mp_lock(ffffffff838f4440) at __mp_lock+0x1a3 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(ffffffff838f4440) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:113 [inline] __mp_lock(ffffffff838f4440) 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 __mp_lock(ffffffff838f4440) at __mp_lock+0x199 __mp_lock_spin sys/kern/kern_lock.c:113 [inline] __mp_lock(ffffffff838f4440) at __mp_lock+0x199 sys/kern/kern_lock.c:144 end trace frame: 0x0, count: 4 ddb{0}> trace x86_ipi_db(ffffffff837edff0) 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_pc() at __sanitizer_cov_trace_pc+0x2c kd_curproc sys/dev/kcov.c:584 [inline] __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x2c sys/dev/kcov.c:153 __mp_lock(ffffffff838f4440) at __mp_lock+0x1a3 __mp_lock_spin sys/kern/kern_lock.c:113 [inline] __mp_lock(ffffffff838f4440) at __mp_lock+0x1a3 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(ffffffff838f4440) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:113 [inline] __mp_lock(ffffffff838f4440) 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 __mp_lock(ffffffff838f4440) at __mp_lock+0x199 __mp_lock_spin sys/kern/kern_lock.c:113 [inline] __mp_lock(ffffffff838f4440) at __mp_lock+0x199 sys/kern/kern_lock.c:144 end trace frame: 0x0, count: -11 ddb{0}> machine ddbcpu 1 Stopped at proc_trampoline+0xc7: movl $0,%gs:0x680 proc_trampoline() at proc_trampoline+0xc7 end of kernel end trace frame: 0x77e694949ab0, count: 14 ddb{1}> trace proc_trampoline() at proc_trampoline+0xc7 end of kernel end trace frame: 0x77e694949ab0, count: -1