uvm_fault(0xfffffd806c63d5d0, 0x98, 0, 1) -> e fatal page fault in supervisor mode trap type 6 code 0 rip ffffffff827885d8 cs 8 rflags 10246 cr2 98 cpl 0 rsp ffff80003c3fad70 gsbase 0xffff80002999dff0 kgsbase 0x0 panic: trap type 6, code=0, pc=ffffffff827885d8 Starting stack trace... panic(ffffffff834ed534) at panic+0x1d0 sys/kern/subr_prf.c:229 kerntrap(ffff80003c3facc0) at kerntrap+0x30b alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b dovutimens(ffff80003679e558,fffffd8061e00528,ffff80003c3faea0) at dovutimens+0x368 sys/kern/vfs_syscalls.c:2690 sys_futimes(ffff80003679e558,ffff80003c3faff0,ffff80003c3faf40) at sys_futimes+0x208 sys/kern/vfs_syscalls.c:2732 syscall(ffff80003c3faff0) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003c3faff0) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:783 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xff93e3eeb0, count: 250 End of stack trace. WARNING: SPL NOT LOWERED ON SYSCALL 83 858154752 EXIT 0 4 Stopped at savectx+0xae: movl $0,%gs:0x688 TID PID UID PRFLAGS PFLAGS CPU COMMAND *516826 31318 0 0 0 1 syz-executor 47096 92144 0 0 0 0 syz-executor savectx() at savectx+0xae end of kernel end trace frame: 0x761d346e1970, 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(0xfffffd806c63d5d0, 0x98, 0, 1) -> e ddb{1}> trace savectx() at savectx+0xae end of kernel end trace frame: 0x761d346e1970, count: -1 ddb{1}> show registers rdi 0 rsi 0 rbp 0xffff80003c4715a0 rbx 0 rdx 0 rcx 0xffff8000fffeea78 rax 0x3a r8 0xffff80003c4714d0 r9 0x1 r10 0x4685ab369341e3ba r11 0x34f90645f048bdad r12 0 r13 0 r14 0xffff8000fffeea78 r15 0 rip 0xffffffff82a403ee savectx+0xae cs 0x8 rflags 0x46 rsp 0xffff80003c471520 ss 0x10 savectx+0xae: movl $0,%gs:0x688 ddb{1}> show proc PROC (syz-executor) tid=516826 pid=31318 tcnt=2 stat=onproc flags process=0 proc=0 runpri=81, usrpri=82, slppri=17, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff8000fffefca0,0xffff80003679f790 process=0xffff80003c46a1d8 user=0xffff80003c46c000, vmspace=0xfffffd806a5773f8 estcpu=32, cpticks=104, pctcpu=0.86, user=1, sys=103, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND *31318 516826 25836 0 7 0 syz-executor 31318 225614 25836 0 3 0x4000080 fsleep syz-executor 95516 196180 57040 0 2 0x2 ifconfig 57040 523701 30184 0 3 0x10008a sigsusp sh 66925 428775 85382 0 2 0 syz-executor 66925 395170 85382 0 3 0x4000000 sbar syz-executor 92144 47096 82518 0 7 0 syz-executor 92144 380354 82518 0 3 0x4000000 biowait syz-executor 57460 110710 33257 60928 2 0x10 syz-executor 57460 394958 33257 60928 2 0x4000010 syz-executor 24759 122454 72179 0 2 0 syz-executor 24759 13846 72179 0 3 0x4000080 fsleep syz-executor 24759 24968 72179 0 3 0x4000080 fsleep syz-executor 47069 430652 45259 0 2 0 syz-executor 47069 92299 45259 0 3 0x4000080 fsleep syz-executor 47069 28383 45259 0 3 0x4000080 fsleep syz-executor 47069 270698 45259 0 3 0x4000080 fsleep syz-executor 30184 185629 68802 0 3 0x82 wait syz-executor 50632 424141 0 0 3 0x14280 nfsidl nfsio 1437 57270 0 0 3 0x14280 nfsidl nfsio 54855 359990 0 0 3 0x14280 nfsidl nfsio 19388 58869 0 0 3 0x14280 nfsidl nfsio 55873 277707 0 0 3 0x14280 nfsidl nfsio 28440 177724 0 0 3 0x14280 nfsidl nfsio 18320 110660 0 0 3 0x14280 nfsidl nfsio 98867 41987 0 0 3 0x14280 nfsidl nfsio 54275 117009 0 0 3 0x14280 nfsidl nfsio 5639 335256 0 0 3 0x14280 nfsidl nfsio 86568 40428 0 0 3 0x14280 nfsidl nfsio 9110 199359 0 0 3 0x14280 nfsidl nfsio 81172 26474 0 0 3 0x14280 nfsidl nfsio 20082 314370 0 0 3 0x14280 nfsidl nfsio 42413 443639 0 0 3 0x14280 nfsidl nfsio 76304 104469 0 0 3 0x14280 nfsidl nfsio 32009 27356 0 0 3 0x14280 nfsidl nfsio 93176 345829 0 0 3 0x14280 nfsidl nfsio 30261 288238 0 0 3 0x14280 nfsidl nfsio 61939 311432 0 0 3 0x14280 nfsidl nfsio 33257 290741 68802 0 2 0xc82 syz-executor 11142 20742 68802 0 2 0x2 syz-executor 72179 176045 68802 0 2 0xc82 syz-executor 25836 19810 68802 0 2 0xc82 syz-executor 45259 34720 68802 0 2 0xc82 syz-executor 82518 66916 68802 0 2 0xc82 syz-executor 85382 300317 68802 0 2 0xc82 syz-executor 68802 284474 50727 0 3 0x82 kqread syz-executor 50727 241608 64093 0 3 0x10008a sigsusp ksh 64093 58760 84509 0 3 0x98 kqread sshd-session 84509 96616 98048 0 3 0x92 kqread sshd-session 72460 428598 1 0 3 0x100083 ttyopn getty 98048 514744 1 0 3 0x88 kqread sshd 21007 503186 95413 74 3 0x1100092 bpf pflogd 95413 445771 1 0 3 0x80 sbwait pflogd 1005 221420 45999 73 3 0x1100090 kqread syslogd 45999 401981 1 0 3 0x100082 sbwait syslogd 41751 369808 1 0 3 0x100080 kqread resolvd 64851 90327 66891 77 3 0x100092 kqread dhcpleased 43364 457364 66891 77 3 0x100092 kqread dhcpleased 66891 210557 1 0 3 0x80 kqread dhcpleased 60788 170945 0 0 3 0x14200 bored smr 65462 461649 0 0 2 0x14200 zerothread 10260 431953 0 0 3 0x14200 aiodoned aiodoned 54675 199542 0 0 3 0x14200 syncer update 62393 343131 0 0 3 0x14200 cleaner cleaner 6151 427231 0 0 3 0x14200 reaper reaper 92883 51176 0 0 3 0x14200 pgdaemon pagedaemon 74004 269217 0 0 3 0x14200 bored viomb 40031 390801 0 0 3 0x40014200 acpi0 acpi0 49089 112655 0 0 3 0x40014200 idle1 83060 245049 0 0 3 0x14200 bored softnet1 71052 359666 0 0 3 0x14200 netlock softnet0 75667 440499 0 0 2 0x40014200 systqmp 45069 25035 0 0 3 0x14200 bored systq 94426 49987 0 0 3 0x14200 tmoslp softclockmp 40519 182364 0 0 3 0x40014200 tmoslp softclock 41323 318495 0 0 3 0x40014200 idle0 1 58229 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{1}> show all locks Process 66925 (syz-executor) thread 0xffff80003679e558 (395170) exclusive kernel_lock &kernel_lock r = 0 (0xffffffff83a3e580) #0 witness_lock+0x5f1 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5f1 sys/kern/subr_witness.c:1160 #1 syscall+0xaf4 mi_syscall sys/sys/syscall_mi.h:175 [inline] #1 syscall+0xaf4 sys/arch/amd64/amd64/trap.c:783 #2 Xsyscall+0x128 Process 92144 (syz-executor) thread 0xffff800038bb1cb8 (380354) exclusive rrwlock inode r = 0 (0xfffffd806e643580) #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 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_makeinode+0xcd sys/ufs/ufs/ufs_vnops.c:1759 #8 ufs_create+0x4e sys/ufs/ufs/ufs_vnops.c:147 #9 VOP_CREATE+0xfe sys/kern/vfs_vops.c:103 #10 vn_open+0x50d sys/kern/vfs_vnops.c:118 #11 doopenat+0x35b sys/kern/vfs_syscalls.c:1162 #12 sys_open+0x59 sys/kern/vfs_syscalls.c:1064 #13 syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline] #13 syscall+0xbd4 sys/arch/amd64/amd64/trap.c:783 #14 Xsyscall+0x128 exclusive rrwlock inode r = 0 (0xfffffd806e458b80) #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:576 #5 vfs_lookup+0x12b sys/kern/vfs_lookup.c:431 #6 namei+0x7c5 sys/kern/vfs_lookup.c:250 #7 vn_open+0x22e sys/kern/vfs_vnops.c:109 #8 doopenat+0x35b sys/kern/vfs_syscalls.c:1162 #9 sys_open+0x59 sys/kern/vfs_syscalls.c:1064 #10 syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline] #10 syscall+0xbd4 sys/arch/amd64/amd64/trap.c:783 #11 Xsyscall+0x128 Process 11142 (syz-executor) thread 0xffff8000fffef240 (20742) exclusive rrwlock inode r = 0 (0xfffffd8069f99b30) #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:576 #5 vget+0x2a2 sys/kern/vfs_subr.c:686 #6 ufs_ihashget+0x185 sys/ufs/ufs/ufs_ihash.c:98 #7 ffs_vget+0x8c sys/ufs/ffs/ffs_vfsops.c:1203 #8 ufs_lookup+0x1a36 sys/ufs/ufs/ufs_lookup.c:478 #9 VOP_LOOKUP+0x6e sys/kern/vfs_vops.c:85 #10 vfs_lookup+0x963 sys/kern/vfs_lookup.c:580 #11 namei+0x7c5 sys/kern/vfs_lookup.c:250 #12 dounlinkat+0xc1 sys/kern/vfs_syscalls.c:1806 #13 syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] #13 syscall+0xb17 sys/arch/amd64/amd64/trap.c:783 #14 Xsyscall+0x128 exclusive rrwlock inode r = 0 (0xfffffd806d1c7e98) #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:576 #5 vfs_lookup+0x12b sys/kern/vfs_lookup.c:431 #6 namei+0x7c5 sys/kern/vfs_lookup.c:250 #7 dounlinkat+0xc1 sys/kern/vfs_syscalls.c:1806 #8 syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] #8 syscall+0xb17 sys/arch/amd64/amd64/trap.c:783 #9 Xsyscall+0x128 ddb{1}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 11062 12094K 12344K 166960K 12752 0 pcb 17 13K 13K 166960K 103 0 rtable 187 8K 9K 166960K 646 0 pf 39 18K 25K 166960K 136 0 ifaddr 35 5K 7K 166960K 94 0 ifgroup 51 2K 2K 166960K 119 0 sysctl 4 1K 9K 166960K 11 0 counters 72 37K 37K 166960K 124 0 ioctlops 0 0K 4K 166960K 1578 0 iov 0 0K 16K 166960K 57 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1411 89K 89K 166960K 1935 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 5K 166960K 8 0 VM map 2 1K 1K 166960K 2 0 sem 12 0K 0K 166960K 33 0 dirhash 12 2K 2K 166960K 15 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 18 65K 93K 166960K 677 0 sigio 0 0K 0K 166960K 2 0 proc 81 147K 196K 166960K 827 0 subproc 72 4K 4K 166960K 144 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 29 0 in_multi 62 4K 7K 166960K 194 0 ether_multi 1 0K 0K 166960K 2 0 mrt 0 0K 0K 166960K 18 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 67 307K 307K 166960K 67 0 exec 0 0K 1K 166960K 533 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 239 153K 165K 166960K 7689 0 UVM aobj 12 2K 2K 166960K 13 0 pinsyscall 43 86K 108K 166960K 2066 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 18 0 NDP 13 0K 2K 166960K 63 0 temp 44 9120K 9179K 166960K 19967 0 kqueue 14 22K 32K 166960K 108 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 176 205 0 130 6 1 5 6 0 8 0 unpcb 144 346 0 325 5 4 1 4 0 8 0 syncache 336 10 0 10 1 1 0 1 0 8 0 tcpcb 736 262 0 257 7 6 1 7 0 8 0 arp 136 34 0 22 1 0 1 1 0 8 0 inpcb 328 763 0 753 11 4 7 7 0 8 6 nd6 152 50 0 37 2 1 1 2 0 8 0 pkpcb 40 4 0 4 1 0 1 1 0 8 1 kcovpl 48 16 0 8 1 0 1 1 0 8 0 ppxss 1192 16 0 13 2 1 1 1 0 8 0 pppxif 1576 1 0 1 1 0 1 1 0 8 1 pfstscr 40 2 0 2 2 1 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 14 0 8 1 0 1 1 0 8 0 pfosfp 40 1428 0 1428 5 4 1 5 0 8 1 pfosfpen 112 1428 0 1428 21 4 17 21 0 8 17 pfrktable 1344 4 0 1 1 0 1 1 0 8 0 pfanchor 1288 12 0 1 1 0 1 1 0 8 0 pftag 88 1 0 0 1 0 1 1 0 8 0 pfstitem 24 51 0 12 1 0 1 1 0 8 0 pfstkey 128 53 0 14 2 0 2 2 0 8 0 pfstate 448 52 0 14 6 0 6 6 0 8 0 pfrule 1360 26 0 19 2 1 1 2 0 8 0 rttmr 136 3 0 3 2 1 1 1 0 8 1 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 880 0 541 29 3 26 29 0 8 3 art_table 40 881 0 541 5 0 5 5 0 8 1 art_node 32 205 0 136 1 0 1 1 0 8 0 sysvmsgpl 40 2 0 1 2 1 1 1 0 8 0 semupl 112 4 0 4 1 0 1 1 0 8 1 semapl 72 30 0 20 1 0 1 1 0 8 0 shmpl 112 10 0 1 1 0 1 1 0 8 0 dirhash 1024 19 0 2 3 0 3 3 0 8 0 dino2pl 256 2313 0 839 93 0 93 93 0 8 0 ffsino 296 2313 0 839 114 0 114 114 0 8 0 nchpl 144 3153 0 1427 64 0 64 64 0 8 0 rtmask 32 4 0 3 2 1 1 1 0 8 0 vnodes 216 2879 0 0 160 0 160 160 0 8 0 namei 1024 11577 0 11576 1 0 1 1 0 8 0 percpumem 16 77 0 26 1 0 1 1 0 8 0 pfiaddrpl 120 1 0 0 1 0 1 1 0 8 0 kstatmem 264 67 0 40 3 1 2 3 0 8 0 scxspl 216 12718 0 12717 11 9 2 8 1 8 1 plimitpl 152 108 0 91 1 0 1 1 0 8 0 sigapl 424 1007 0 939 9 1 8 8 0 8 0 knotepl 120 313 0 0 10 0 10 10 0 8 0 kqueuepl 224 151 0 140 2 0 2 2 0 8 1 pipepl 344 180 0 153 3 0 3 3 0 8 0 fdescpl 528 971 0 939 3 0 3 3 0 8 0 filepl 160 5020 0 4794 19 7 12 19 0 8 2 lockfpl 104 445 0 441 2 1 1 2 0 8 0 lockfspl 48 169 0 165 1 0 1 1 0 8 0 sessionpl 144 87 0 78 1 0 1 1 0 8 0 pgrppl 48 108 0 91 1 0 1 1 0 8 0 ucredpl 104 528 0 513 1 0 1 1 0 8 0 zombiepl 144 939 0 939 1 0 1 1 0 8 1 processpl 1232 1007 0 939 6 0 6 6 0 8 0 procpl 664 1749 0 1672 8 0 8 8 0 8 1 sosppl 176 4 0 4 2 1 1 1 0 8 1 sockpl 752 1255 0 1221 20 9 11 17 0 8 7 mcl64k 65536 3 0 0 1 0 1 1 0 8 0 mcl16k 16384 2 0 0 1 0 1 1 0 8 0 mcl9k128 9344 1 0 0 1 0 1 1 0 8 0 mcl8k 8192 1 0 0 1 0 1 1 0 8 0 mcl4k 4096 115 0 0 15 0 15 15 0 8 0 mcl2k 2048 28 0 0 4 0 4 4 0 8 0 mtagpl 96 4 0 0 1 0 1 1 0 8 0 mbufpl 256 278 0 0 18 0 18 18 0 8 0 bufpl 280 4302 0 105 300 0 300 300 0 8 0 anonpl 32 7671 0 0 62 0 62 62 0 246 0 amapchunkpl 152 23604 0 23119 28 0 28 28 0 158 8 amappl16 200 2970 0 2935 21 10 11 15 0 8 8 amappl15 192 9 0 9 1 1 0 1 0 8 0 amappl14 184 535 0 533 1 0 1 1 0 8 0 amappl13 176 177 0 165 1 0 1 1 0 8 0 amappl12 168 1260 0 1229 2 0 2 2 0 8 0 amappl11 160 3 0 3 1 1 0 1 0 8 0 amappl10 152 64 0 50 1 0 1 1 0 8 0 amappl9 144 327 0 327 1 1 0 1 0 8 0 amappl8 136 134 0 131 1 0 1 1 0 8 0 amappl7 128 164 0 151 1 0 1 1 0 8 0 amappl6 120 235 0 231 1 0 1 1 0 8 0 amappl5 112 103 0 92 1 0 1 1 0 8 0 amappl4 104 326 0 305 1 0 1 1 0 8 0 amappl3 96 4693 0 4578 4 0 4 4 0 8 0 amappl2 88 619 0 555 2 0 2 2 0 8 0 amappl1 80 13319 0 12707 16 2 14 15 0 8 1 amappl 88 6744 0 6578 5 0 5 5 0 92 0 uvmvnodes 80 118 0 0 3 0 3 3 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 6 0 6 1 1 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 7 0 7 1 1 0 1 0 8 0 dma16 16 18 0 17 1 0 1 1 0 8 0 aobjpl 72 12 0 1 1 0 1 1 0 8 0 uaddrrnd 24 971 0 939 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 971 0 939 1 0 1 1 0 8 0 vmmpekpl 168 9425 0 9384 3 0 3 3 0 8 0 vmmpepl 168 69995 0 68063 100 1 99 99 0 357 12 vmsppl 488 970 0 939 6 1 5 5 0 8 0 rwobjpl 80 21945 0 20850 30 2 28 28 0 8 2 pdppl 4096 1949 0 1878 113 40 73 85 0 8 2 pvpl 32 15004 0 0 122 1 121 121 0 265 0 pmappl 256 970 0 939 3 0 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 302 0 53 8 0 8 8 0 8 0 ddb{1}> machine ddbcpu 0 Stopped at x86_ipi_db+0x27: addq $0x8,%rsp x86_ipi_db(ffffffff83994ff0) 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(ffffffff83a3dd80) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:142 [inline] __mp_lock(ffffffff83a3dd80) 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(ffffffff83a3dd80) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:142 [inline] __mp_lock(ffffffff83a3dd80) at __mp_lock+0x192 sys/kern/kern_lock.c:173 intr_handler(ffff80002a2f63a0,ffff8000002a3480) at intr_handler+0xe9 sys/arch/amd64/amd64/intr.c:560 Xintr_ioapic_edge23_untramp() at Xintr_ioapic_edge23_untramp+0x18f __mp_lock(ffffffff83a3dd80) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:142 [inline] __mp_lock(ffffffff83a3dd80) at __mp_lock+0x192 sys/kern/kern_lock.c:173 softintr_dispatch(0) at softintr_dispatch+0x125 sys/kern/kern_softintr.c:83 dosoftint(0) at dosoftint+0x54 sys/arch/amd64/amd64/intr.c:862 Xsoftclock() at Xsoftclock+0x27 end of kernel end trace frame: 0x77dc61098220, count: 1 ddb{0}> trace x86_ipi_db(ffffffff83994ff0) 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(ffffffff83a3dd80) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:142 [inline] __mp_lock(ffffffff83a3dd80) 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(ffffffff83a3dd80) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:142 [inline] __mp_lock(ffffffff83a3dd80) at __mp_lock+0x192 sys/kern/kern_lock.c:173 intr_handler(ffff80002a2f63a0,ffff8000002a3480) at intr_handler+0xe9 sys/arch/amd64/amd64/intr.c:560 Xintr_ioapic_edge23_untramp() at Xintr_ioapic_edge23_untramp+0x18f __mp_lock(ffffffff83a3dd80) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:142 [inline] __mp_lock(ffffffff83a3dd80) at __mp_lock+0x192 sys/kern/kern_lock.c:173 softintr_dispatch(0) at softintr_dispatch+0x125 sys/kern/kern_softintr.c:83 dosoftint(0) at dosoftint+0x54 sys/arch/amd64/amd64/intr.c:862 Xsoftclock() at Xsoftclock+0x27 end of kernel end trace frame: 0x77dc61098220, count: -14 ddb{0}> machine ddbcpu 1 Stopped at savectx+0xae: movl $0,%gs:0x688 savectx() at savectx+0xae end of kernel end trace frame: 0x761d346e1970, count: 14 ddb{1}> trace savectx() at savectx+0xae end of kernel end trace frame: 0x761d346e1970, count: -1