uvm_fault(0xfffffd800b0637a0, 0x0, 0, 1) -> e fatal page fault in supervisor mode trap type 6 code 0 rip ffffffff81047658 cs 8 rflags 10207 cr2 0 cpl 0 rsp ffff80003c45d7f0 gsbase 0xffff8000299ddff0 kgsbase 0x0 panic: trap type 6, code=0, pc=ffffffff81047658 Starting stack trace... panic(ffffffff833e5c81) at panic+0x1d0 sys/kern/subr_prf.c:229 kerntrap(ffff80003c45d740) at kerntrap+0x30b alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b dt_ioctl_record_stop(ffff8000016eb000) at dt_ioctl_record_stop+0x108 sys/dev/dt/dt_dev.c:593 dtclose(11e5f,81,2000,ffff80003bff8fb0) at dtclose+0x109 dt_pcb_purge sys/dev/dt/dt_dev.c:-1 [inline] dtclose(11e5f,81,2000,ffff80003bff8fb0) at dtclose+0x109 sys/dev/dt/dt_dev.c:239 spec_close(ffff80003c45d8f0) at spec_close+0x466 sys/kern/spec_vnops.c:-1 VOP_CLOSE(fffffd806e8e00d8,81,fffffd80097fd3a8,ffff80003bff8fb0) at VOP_CLOSE+0x132 sys/kern/vfs_vops.c:156 vn_closefile(fffffd806c7afd58,ffff80003bff8fb0) at vn_closefile+0x12b vn_close sys/kern/vfs_vnops.c:292 [inline] vn_closefile(fffffd806c7afd58,ffff80003bff8fb0) at vn_closefile+0x12b sys/kern/vfs_vnops.c:615 fdrop(fffffd806c7afd58,ffff80003bff8fb0) at fdrop+0x121 sys/kern/kern_descrip.c:1280 closef(fffffd806c7afd58,ffff80003bff8fb0) at closef+0x192 sys/kern/kern_descrip.c:1264 fdfree(ffff80003bff8fb0) at fdfree+0x116 sys/kern/kern_descrip.c:1195 exit1(ffff80003bff8fb0,0,0,1) at exit1+0x576 sys/kern/kern_exit.c:215 sys_exit(ffff80003bff8fb0,ffff80003c45dc60,ffff80003c45dbb0) at sys_exit+0x1a sys/kern/kern_exit.c:-1 syscall(ffff80003c45dc60) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003c45dc60) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:775 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x754c50c58d10, count: 242 End of stack trace. WARNING: SPL NOT LOWERED ON SYSCALL 91 481840376 EXIT 0 4 Stopped at savectx+0xae: movl $0,%gs:0x688 TID PID UID PRFLAGS PFLAGS CPU COMMAND 456771 33056 0 0 0 0 syz-executor *461140 93680 0 0x2 0 1 syz-executor savectx() at savectx+0xae end of kernel end trace frame: 0x7f0a1cb84ce0, 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(0xfffffd800b0637a0, 0x0, 0, 1) -> e ddb{1}> trace savectx() at savectx+0xae end of kernel end trace frame: 0x7f0a1cb84ce0, count: -1 ddb{1}> show registers rdi 0 rsi 0 rbp 0xffff80002ebc5bd0 rbx 0 rdx 0 rcx 0xffff80003bff8020 rax 0x3a r8 0xffff80002ebc5b00 r9 0x1 r10 0xa49bb5600cc9e8ea r11 0x227b2ab9b188e421 r12 0 r13 0 r14 0xffff80003bff8020 r15 0 rip 0xffffffff81b193ee savectx+0xae cs 0x8 rflags 0x46 rsp 0xffff80002ebc5b50 ss 0x10 savectx+0xae: movl $0,%gs:0x688 ddb{1}> show proc PROC (syz-executor) tid=461140 pid=93680 tcnt=1 stat=onproc flags process=2 proc=0 runpri=82, usrpri=82, slppri=32, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff80003abf1250,0xffff80003abf0a98 process=0xffff80003c44ab80 user=0xffff80002ebc0000, vmspace=0xfffffd806f6247a8 estcpu=32, cpticks=10, pctcpu=0.9, user=0, sys=10, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 33056 456771 28394 0 7 0 syz-executor 33056 237863 28394 0 2 0x4000000 syz-executor 57831 117595 93680 0 3 0x80 nanoslp syz-executor 57831 82593 93680 0 3 0x4000080 kqread syz-executor 57831 504442 93680 0 3 0x4000080 fsleep syz-executor 57831 462761 93680 0 3 0x4000080 kqread syz-executor *93680 461140 66268 0 7 0x2 syz-executor 27661 409652 66268 0 3 0x82 wait syz-executor 75808 122260 0 0 3 0x14200 acct acct 78270 7300 66268 0 3 0x82 wait syz-executor 37402 320510 66268 0 3 0x82 nanoslp syz-executor 82670 126045 66268 0 3 0x82 wait syz-executor 19202 430660 66268 0 3 0x2 biowait syz-executor 27007 367299 66268 0 3 0x82 wait syz-executor 28394 251128 66268 0 3 0x82 nanoslp syz-executor 66268 441016 66293 0 3 0x82 kqread syz-executor 66293 158263 73652 0 3 0x10008a sigsusp ksh 73652 496676 33487 0 3 0x98 kqread sshd-session 33487 320385 83968 0 3 0x92 kqread sshd-session 83708 425893 1 0 3 0x100083 ttyin getty 83968 318378 1 0 3 0x88 kqread sshd 41344 256378 16077 74 3 0x1100092 bpf pflogd 16077 372425 1 0 3 0x80 sbwait pflogd 17456 183511 70551 73 3 0x1100090 kqread syslogd 70551 80755 1 0 3 0x100082 sbwait syslogd 69391 187202 1 0 3 0x100080 kqread resolvd 89412 91087 31646 77 3 0x100092 kqread dhcpleased 56219 111921 31646 77 3 0x100092 kqread dhcpleased 31646 462676 1 0 3 0x80 kqread dhcpleased 33052 416383 0 0 3 0x14200 bored smr 34864 440734 0 0 3 0x14200 pgzero zerothread 76372 481897 0 0 3 0x14200 aiodoned aiodoned 79175 519136 0 0 3 0x14200 syncer update 62583 39522 0 0 3 0x14200 cleaner cleaner 41034 155763 0 0 3 0x14200 reaper reaper 18353 96285 0 0 3 0x14200 pgdaemon pagedaemon 92296 79226 0 0 3 0x14200 bored viomb 97868 114164 0 0 3 0x40014200 acpi0 acpi0 372 491527 0 0 3 0x40014200 idle1 8757 122905 0 0 3 0x14200 bored softnet1 15442 432813 0 0 3 0x14200 netlock softnet0 91704 89503 0 0 2 0x40014200 systqmp 17758 300257 0 0 3 0x14200 bored systq 74167 503255 0 0 3 0x14200 tmoslp softclockmp 37559 216739 0 0 3 0x40014200 tmoslp softclock 91925 109323 0 0 3 0x40014200 idle0 1 127254 0 0 3 0x82 wait init 0 0 -1 0 3 0x10010200 scheduler swapper ddb{1}> show all locks Process 33056 (syz-executor) thread 0xffff80003bff8550 (456771) exclusive rwlock uobjlk r = 0 (0xfffffd806d0c4888) #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 uvm_fault+0x1e5 sys/uvm/uvm_fault.c:649 #3 upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:192 #4 usertrap+0x42f sys/arch/amd64/amd64/trap.c:632 #5 recall_trap+0x8 shared rwlock vmmaplk r = 0 (0xfffffd800b0636b8) #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_read+0x3e8 sys/kern/kern_rwlock.c:413 #2 uvmfault_lookup+0x122 sys/uvm/uvm_fault.c:1880 #3 uvm_fault_check+0x4f sys/uvm/uvm_fault.c:693 #4 uvm_fault+0x106 sys/uvm/uvm_fault.c:627 #5 upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:192 #6 usertrap+0x42f sys/arch/amd64/amd64/trap.c:632 #7 recall_trap+0x8 Process 19202 (syz-executor) thread 0xffff8000ffffc2a0 (430660) exclusive rrwlock inode r = 0 (0xfffffd806e912ee0) #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 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+0x93a sys/kern/vfs_lookup.c:566 #11 namei+0x7ca sys/kern/vfs_lookup.c:250 #12 dounlinkat+0xc1 sys/kern/vfs_syscalls.c:1868 #13 syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] #13 syscall+0xb17 sys/arch/amd64/amd64/trap.c:775 #14 Xsyscall+0x128 exclusive rrwlock inode r = 0 (0xfffffd806d7fc1f8) #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 dounlinkat+0xc1 sys/kern/vfs_syscalls.c:1868 #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 ddb{1}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 11100 12185K 12816K 166960K 14472 0 pcb 17 16K 18K 166960K 679 0 rtable 205 12K 12K 166960K 828 0 pf 36 18K 21K 166960K 312 0 ifaddr 37 6K 7K 166960K 226 0 ifgroup 55 2K 3K 166960K 409 0 sysctl 4 1K 9K 166960K 24 0 counters 70 37K 39K 166960K 572 0 ioctlops 0 0K 4K 166960K 2279 0 iov 0 0K 24K 166960K 142 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1424 90K 90K 166960K 3032 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 5K 166960K 16 0 VM map 2 1K 1K 166960K 2 0 sem 47 136K 137K 166960K 57 0 dirhash 12 2K 2K 166960K 63 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 17 61K 93K 166960K 2518 0 sigio 0 0K 0K 166960K 85 0 proc 74 115K 196K 166960K 879 0 subproc 72 4K 4K 166960K 118 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 638 0 in_multi 70 5K 7K 166960K 316 0 ether_multi 1 0K 0K 166960K 41 0 mrt 2 0K 0K 166960K 31 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 121 546K 546K 166960K 121 0 exec 0 0K 1K 166960K 1167 0 fusefs mount 1 32K 32K 166960K 1 0 pfkey data 0 0K 0K 166960K 9 0 tdb 3 0K 0K 166960K 3 0 VM swap 8 62K 64K 166960K 10 0 UVM amap 263 169K 183K 166960K 24715 0 UVM aobj 67 23K 23K 166960K 80 0 pinsyscall 42 84K 102K 166960K 3812 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 1K 166960K 197 0 NDP 13 0K 2K 166960K 160 0 temp 84 8680K 8756K 166960K 98934 0 kqueue 15 24K 32K 166960K 510 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 120 412 0 409 7 4 3 3 0 8 2 rtentry 176 239 0 165 6 1 5 6 0 8 0 unpcb 144 1807 0 1788 12 8 4 6 0 8 3 syncache 336 10 0 10 5 5 0 1 0 8 0 tcpqe 32 1 0 1 1 1 0 1 0 8 0 tcpcb 736 833 0 827 20 16 4 7 0 8 3 arp 136 31 0 19 1 0 1 1 0 8 0 inpcb 328 3177 0 3168 23 16 7 10 0 8 5 nd6 152 42 0 26 1 0 1 1 0 8 0 pkpcb 40 85 0 85 4 3 1 1 0 8 1 kcovpl 48 13 0 5 1 0 1 1 0 8 0 mppekey 1024 1 0 1 1 1 0 1 0 8 0 ppxss 1192 206 0 206 1 0 1 1 0 8 1 pppxif 1504 90 0 90 4 3 1 1 0 8 1 pfstscr 40 1 0 1 1 1 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 35 0 22 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 pftag 88 1 0 0 1 0 1 1 0 8 0 pfstitem 24 136 0 52 1 0 1 1 0 8 0 pfstkey 128 153 0 69 4 0 4 4 0 8 0 pfstate 448 152 0 68 12 1 11 11 0 8 0 pfrule 1344 26 0 20 2 1 1 2 0 8 0 rttmr 136 6 0 6 4 3 1 1 0 8 1 art_heap8 4096 4 0 1 4 1 3 4 0 8 0 art_heap4 256 1118 0 773 37 15 22 29 0 8 0 art_table 40 1122 0 774 5 0 5 5 0 8 0 art_node 32 235 0 171 1 0 1 1 0 8 0 sysvmsgpl 40 12 0 5 1 0 1 1 0 8 0 semupl 112 1 0 1 1 1 0 1 0 8 0 semapl 112 50 0 5 2 0 2 2 0 8 0 shmpl 112 66 0 11 2 0 2 2 0 8 0 dirhash 1024 52 0 35 3 0 3 3 0 8 0 dino2pl 256 6144 0 4635 96 0 96 96 0 8 0 ffsino 296 6144 0 4635 118 0 118 118 0 8 0 nchpl 144 9584 0 7861 65 0 65 65 0 8 1 rtmask 32 30 0 30 3 2 1 1 0 8 1 vnodes 216 5926 0 0 330 0 330 330 0 8 0 namei 1024 32844 0 32844 6 5 1 2 0 8 1 percpumem 16 301 0 251 1 0 1 1 0 8 0 vcpupl 3968 10 0 1 3 1 2 2 0 8 0 vmpool 848 11 0 2 2 1 1 1 0 8 0 kstatmem 264 260 0 230 3 0 3 3 0 8 0 acpiwqpl 32 1 0 1 1 0 1 1 1 8 1 scsiplug 72 9 0 9 5 4 1 1 0 8 1 scxspl 216 57071 0 57070 10 7 3 4 1 8 2 plimitpl 152 651 0 634 1 0 1 1 0 8 0 sigapl 424 2849 0 2801 9 2 7 8 0 8 0 knotepl 120 808 0 0 24 0 24 24 0 8 0 kqueuepl 224 1053 0 1041 8 6 2 5 0 8 1 pipepl 344 450 0 422 7 4 3 6 0 8 0 fdescpl 528 2811 0 2780 3 0 3 3 0 8 0 filepl 160 19230 0 19003 25 10 15 18 0 8 4 lockfpl 104 838 0 836 1 0 1 1 0 8 0 lockfspl 48 340 0 338 1 0 1 1 0 8 0 sessionpl 144 29 0 20 1 0 1 1 0 8 0 pgrppl 48 75 0 58 1 0 1 1 0 8 0 ucredpl 104 2707 0 2691 1 0 1 1 0 8 0 zombiepl 144 2806 0 2801 1 0 1 1 0 8 0 processpl 1232 2849 0 2801 7 2 5 6 0 8 0 procpl 664 6944 0 6892 8 1 7 8 0 8 0 sosppl 176 18 0 18 4 4 0 1 0 8 0 sockpl 752 5566 0 5535 37 25 12 17 0 8 8 mcl64k 65536 8 0 0 1 0 1 1 0 8 0 mcl16k 16384 4 0 0 1 0 1 1 0 8 0 mcl12k 12288 2 0 0 1 0 1 1 0 8 0 mcl9k 9216 2 0 0 1 0 1 1 0 8 0 mcl8k 8192 2 0 0 1 0 1 1 0 8 0 mcl4k 4096 114 0 0 15 1 14 15 0 8 0 mcl2k2 2112 1 0 0 1 0 1 1 0 8 0 mcl2k 2048 46 0 0 5 0 5 5 0 8 0 mtagpl 96 19 0 0 1 0 1 1 0 8 0 mbufpl 256 1182 0 0 74 0 74 74 0 8 0 bufpl 280 22442 0 16306 439 0 439 439 0 8 0 anonpl 32 18285 0 0 148 0 148 148 0 246 0 amapchunkpl 152 85624 0 85020 47 11 36 36 0 158 9 amappl16 200 9998 0 9909 55 32 23 32 0 8 8 amappl15 192 8 0 8 1 1 0 1 0 8 0 amappl14 184 13 0 11 1 0 1 1 0 8 0 amappl13 176 496 0 495 1 0 1 1 0 8 0 amappl12 168 3219 0 3177 3 0 3 3 0 8 0 amappl11 160 4 0 3 2 1 1 1 0 8 0 amappl10 152 52 0 38 1 0 1 1 0 8 0 amappl9 144 245 0 245 1 1 0 1 0 8 0 amappl8 136 27 0 24 1 0 1 1 0 8 0 amappl7 128 101 0 100 1 0 1 1 0 8 0 amappl6 120 347 0 333 1 0 1 1 0 8 0 amappl5 112 82 0 70 1 0 1 1 0 8 0 amappl4 104 472 0 440 1 0 1 1 0 8 0 amappl3 96 17426 0 17308 5 1 4 4 0 8 0 amappl2 88 610 0 548 2 0 2 2 0 8 0 amappl1 80 19730 0 19129 16 2 14 15 0 8 0 amappl 88 23496 0 23313 5 0 5 5 0 92 0 uvmvnodes 80 184 0 0 4 0 4 4 0 8 0 dma65536 65536 2 0 2 2 1 1 1 0 8 1 dma16384 16384 2 0 2 2 2 0 1 0 8 0 dma8192 8192 1 0 1 1 1 0 1 0 8 0 dma4096 4096 3 0 3 3 3 0 1 0 8 0 dma2048 2048 1 0 1 1 1 0 1 0 8 0 dma1024 1024 3 0 2 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 9 0 9 3 3 0 1 0 8 0 dma32 32 7 0 7 1 1 0 1 0 8 0 dma16 16 19 0 18 1 0 1 1 0 8 0 aobjpl 72 79 0 13 2 0 2 2 0 8 0 uaddrrnd 24 2811 0 2780 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 2811 0 2780 1 0 1 1 0 8 0 vmmpekpl 168 24001 0 23953 3 0 3 3 0 8 0 vmmpepl 168 180957 0 178923 131 17 114 114 0 357 11 vmsppl 488 2810 0 2780 7 2 5 5 0 8 0 rwobjpl 80 47820 0 46535 41 4 37 37 0 8 3 pdppl 4096 5651 0 5573 119 37 82 85 0 8 4 pvpl 32 27496 0 0 222 1 221 221 0 265 0 pmappl 256 2821 0 2782 3 0 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 415 0 92 10 0 10 10 0 8 0 ddb{1}> machine ddbcpu 0 Stopped at x86_ipi_db+0x27: addq $0x8,%rsp x86_ipi_db(ffffffff83824ff0) 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(ffffffff838e6d00) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:142 [inline] __mp_lock(ffffffff838e6d00) 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(ffffffff838e6d00) at __mp_lock+0x199 __mp_lock_spin sys/kern/kern_lock.c:142 [inline] __mp_lock(ffffffff838e6d00) at __mp_lock+0x199 sys/kern/kern_lock.c:173 intr_handler(ffff80002a30be60,ffff8000002a3480) at intr_handler+0xe9 sys/arch/amd64/amd64/intr.c:560 Xintr_ioapic_edge23_untramp() at Xintr_ioapic_edge23_untramp+0x18f __mp_lock(ffffffff838e6d00) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:142 [inline] __mp_lock(ffffffff838e6d00) at __mp_lock+0x192 sys/kern/kern_lock.c:173 uvm_fault(fffffd800b0635b8,738799d8000,0,2) at uvm_fault+0x1ea sys/uvm/uvm_fault.c:650 upageflttrap(ffff80002a30c200,738799d8000) at upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:192 usertrap(ffff80002a30c200) at usertrap+0x42f sys/arch/amd64/amd64/trap.c:632 end trace frame: 0xffff80002a30c280, count: 0 ddb{0}> trace x86_ipi_db(ffffffff83824ff0) 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(ffffffff838e6d00) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:142 [inline] __mp_lock(ffffffff838e6d00) 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(ffffffff838e6d00) at __mp_lock+0x199 __mp_lock_spin sys/kern/kern_lock.c:142 [inline] __mp_lock(ffffffff838e6d00) at __mp_lock+0x199 sys/kern/kern_lock.c:173 intr_handler(ffff80002a30be60,ffff8000002a3480) at intr_handler+0xe9 sys/arch/amd64/amd64/intr.c:560 Xintr_ioapic_edge23_untramp() at Xintr_ioapic_edge23_untramp+0x18f __mp_lock(ffffffff838e6d00) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:142 [inline] __mp_lock(ffffffff838e6d00) at __mp_lock+0x192 sys/kern/kern_lock.c:173 uvm_fault(fffffd800b0635b8,738799d8000,0,2) at uvm_fault+0x1ea sys/uvm/uvm_fault.c:650 upageflttrap(ffff80002a30c200,738799d8000) at upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:192 usertrap(ffff80002a30c200) at usertrap+0x42f sys/arch/amd64/amd64/trap.c:632 recall_trap() at recall_trap+0x8 end of kernel end trace frame: 0x74863028dc70, count: -15 ddb{0}> machine ddbcpu 1 Stopped at savectx+0xae: movl $0,%gs:0x688 savectx() at savectx+0xae end of kernel end trace frame: 0x7f0a1cb84ce0, count: 14 ddb{1}> trace savectx() at savectx+0xae end of kernel end trace frame: 0x7f0a1cb84ce0, count: -1