uvm_fault(0xfffffd800cb9f020, 0x0, 0, 1) -> e fatal page fault in supervisor mode trap type 6 code 0 rip ffffffff81805038 cs 8 rflags 10207 cr2 0 cpl 0 rsp ffff800032413280 gsbase 0xffff8000299edff0 kgsbase 0x0 panic: trap type 6, code=0, pc=ffffffff81805038 Starting stack trace... panic(ffffffff8339fe2b) at panic+0x1d0 sys/kern/subr_prf.c:229 kerntrap(ffff8000324131d0) at kerntrap+0x30b alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b dt_ioctl_record_stop(ffff800001481000) at dt_ioctl_record_stop+0x108 sys/dev/dt/dt_dev.c:586 dtclose(21e5f,2,2000,ffff80002a3b82d8) at dtclose+0x109 dt_pcb_purge sys/dev/dt/dt_dev.c:-1 [inline] dtclose(21e5f,2,2000,ffff80002a3b82d8) at dtclose+0x109 sys/dev/dt/dt_dev.c:232 spec_close(ffff800032413380) at spec_close+0x466 sys/kern/spec_vnops.c:-1 VOP_CLOSE(fffffd807e1a3888,2,fffffd80097fb138,ffff80002a3b82d8) at VOP_CLOSE+0x132 sys/kern/vfs_vops.c:156 vn_closefile(fffffd807e17d438,ffff80002a3b82d8) at vn_closefile+0x12b vn_close sys/kern/vfs_vnops.c:292 [inline] vn_closefile(fffffd807e17d438,ffff80002a3b82d8) at vn_closefile+0x12b sys/kern/vfs_vnops.c:615 fdrop(fffffd807e17d438,ffff80002a3b82d8) at fdrop+0x121 sys/kern/kern_descrip.c:1280 closef(fffffd807e17d438,ffff80002a3b82d8) at closef+0x192 sys/kern/kern_descrip.c:1264 fdfree(ffff80002a3b82d8) at fdfree+0x116 sys/kern/kern_descrip.c:1195 exit1(ffff80002a3b82d8,0,0,1) at exit1+0x576 sys/kern/kern_exit.c:215 sys_exit(ffff80002a3b82d8,ffff8000324136f0,ffff800032413640) at sys_exit+0x1a sys/kern/kern_exit.c:-1 syscall(ffff8000324136f0) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff8000324136f0) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:748 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x6f86ec000ef0, count: 242 End of stack trace. WARNING: SPL NOT LOWERED ON SYSCALL 91 -2035861480 EXIT 0 4 Stopped at savectx+0xae: movl $0,%gs:0x688 TID PID UID PRFLAGS PFLAGS CPU COMMAND 310913 29479 0 0 0 0 syz-executor * 206 13701 0 0x2 0 1 syz-executor savectx() at savectx+0xae end of kernel end trace frame: 0x757d86a73800, 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(0xfffffd800cb9f020, 0x0, 0, 1) -> e ddb{1}> trace savectx() at savectx+0xae end of kernel end trace frame: 0x757d86a73800, count: -1 ddb{1}> show registers rdi 0 rsi 0 rbp 0xffff80002a3a5db0 rbx 0 rdx 0 rcx 0xffff800032809778 rax 0x3c r8 0xffff80002a3a5ce0 r9 0x1 r10 0x9b1694aebf58521a r11 0xe885630a433359eb r12 0 r13 0 r14 0xffff800032809778 r15 0 rip 0xffffffff81a153ee savectx+0xae cs 0x8 rflags 0x46 rsp 0xffff80002a3a5d30 ss 0x10 savectx+0xae: movl $0,%gs:0x688 ddb{1}> show proc PROC (syz-executor) tid=206 pid=13701 tcnt=1 stat=onproc flags process=2 proc=0 runpri=50, usrpri=50, slppri=32, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff80003a039cc0,0xffff80003a039a38 process=0xffff800037027510 user=0xffff80002a3a0000, vmspace=0xfffffd8067e3e5e0 estcpu=36, cpticks=8, pctcpu=0.0, user=0, sys=7, intr=1 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 29479 310913 4695 0 7 0 syz-executor 61994 39421 13701 0 2 0 syz-executor 61994 214829 13701 0 3 0x4000080 fsleep syz-executor 61994 128304 13701 0 2 0x4000000 syz-executor 44245 155077 27631 0 2 0 syz-executor 73505 390579 90847 0 2 0 syz-executor 73505 92899 90847 0 3 0x4000080 kqread syz-executor 78456 398156 73974 0 3 0x80 nanoslp syz-executor 78456 501757 73974 0 3 0x4000080 kqsel syz-executor 78456 349950 73974 0 3 0x4000080 fsleep syz-executor 36938 151426 25786 0 3 0x80 nanoslp syz-executor 36938 205815 25786 0 3 0x4000080 kqsel syz-executor 36938 422769 25786 0 3 0x4000080 fsleep syz-executor 71535 287386 92885 0 3 0x3000 suspend syz-executor 71535 41630 92885 0 3 0x4081000 biowait syz-executor 71535 326311 92885 0 3 0x4081000 inode syz-executor 71535 13754 92885 0 3 0x4081000 inode syz-executor 4695 470154 59077 0 3 0x82 nanoslp syz-executor *13701 206 59077 0 7 0x2 syz-executor 27631 25618 59077 0 3 0x82 nanoslp syz-executor 72400 381719 0 0 3 0x14200 bored sosplice 69989 106541 0 0 3 0x14200 acct acct 90847 331520 59077 0 3 0x82 nanoslp syz-executor 65338 136713 59077 0 3 0x82 nanoslp syz-executor 25786 25066 59077 0 3 0x82 nanoslp syz-executor 73974 411436 59077 0 3 0x82 nanoslp syz-executor 92885 515840 59077 0 3 0x82 nanoslp syz-executor 59077 482177 3193 0 3 0x82 kqread syz-executor 3193 234830 16016 0 3 0x10008a sigsusp ksh 16016 202562 22749 0 3 0x98 kqread sshd-session 22749 317770 54044 0 3 0x92 kqread sshd-session 62563 338356 1 0 3 0x100083 ttyin getty 54044 347064 1 0 3 0x88 kqread sshd 40407 201930 64280 74 3 0x1100092 bpf pflogd 64280 38758 1 0 3 0x80 sbwait pflogd 67192 515251 7282 73 3 0x1100090 kqread syslogd 7282 230225 1 0 3 0x100082 sbwait syslogd 39400 21628 1 0 3 0x100080 kqread resolvd 28247 486456 19067 77 3 0x100092 kqread dhcpleased 34816 490764 19067 77 3 0x100092 kqread dhcpleased 19067 67819 1 0 3 0x80 kqread dhcpleased 86926 177871 0 0 3 0x14200 bored smr 57498 420733 0 0 2 0x14200 zerothread 65931 98219 0 0 3 0x14200 aiodoned aiodoned 70175 135615 0 0 3 0x14200 syncer update 4105 402518 0 0 3 0x14200 cleaner cleaner 85215 417347 0 0 3 0x14200 reaper reaper 8108 7024 0 0 3 0x14200 pgdaemon pagedaemon 40824 402571 0 0 3 0x14200 bored viomb 61573 4036 0 0 3 0x40014200 acpi0 acpi0 54499 429055 0 0 3 0x40014200 idle1 4689 114055 0 0 3 0x14200 bored softnet7 50490 42440 0 0 3 0x14200 bored softnet6 38541 73708 0 0 3 0x14200 bored softnet5 26679 227380 0 0 3 0x14200 bored softnet4 10056 307687 0 0 3 0x14200 bored softnet3 91089 171254 0 0 3 0x14200 bored softnet2 12142 100504 0 0 3 0x14200 bored softnet1 93807 343773 0 0 3 0x14200 netlock softnet0 84612 160089 0 0 2 0x40014200 systqmp 44119 159420 0 0 3 0x14200 bored systq 97488 119840 0 0 3 0x14200 tmoslp softclockmp 704 260052 0 0 3 0x40014200 tmoslp softclock 95991 195467 0 0 3 0x40014200 idle0 1 156781 0 0 3 0x82 wait init 0 0 -1 0 3 0x10010200 scheduler swapper ddb{1}> show all locks Process 29479 (syz-executor) thread 0xffff80002a3b8808 (310913) shared rwlock vmmaplk r = 0 (0xfffffd800cb9f8c0) #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:1924 #3 uvm_fault_check+0x4a sys/uvm/uvm_fault.c:741 #4 uvm_fault+0x106 sys/uvm/uvm_fault.c:677 #5 upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:192 #6 usertrap+0x3c6 sys/arch/amd64/amd64/trap.c:605 #7 recall_trap+0x8 Process 71535 (syz-executor) thread 0xffff800032808020 (41630) exclusive rrwlock inode r = 0 (0xfffffd8067a350e8) #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+0xa3 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:748 #9 Xsyscall+0x128 Process 71535 (syz-executor) thread 0xffff800032808550 (13754) exclusive rrwlock inode r = 0 (0xfffffd8068866c70) #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+0xa3 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:748 #9 Xsyscall+0x128 ddb{1}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10256 11125K 11298K 166960K 12092 0 pcb 19 14K 16K 166960K 298 0 rtable 179 7K 8K 166960K 377 0 pf 36 17K 67485K 166960K 93 0 ifaddr 42 7K 7K 166960K 75 0 ifgroup 59 2K 2K 166960K 108 0 sysctl 3 1K 9K 166960K 7 0 counters 70 37K 37K 166960K 114 0 ioctlops 0 0K 4K 166960K 1531 0 iov 0 0K 16K 166960K 23 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1343 85K 85K 166960K 1804 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 5K 166960K 7 0 VM map 2 1K 1K 166960K 2 0 sem 12 0K 0K 166960K 84 0 dirhash 12 2K 2K 166960K 18 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 18 65K 240K 166960K 564 0 sigio 0 0K 0K 166960K 9 0 proc 73 115K 163K 166960K 653 0 subproc 72 4K 4K 166960K 99 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 53 0 in_multi 87 6K 7K 166960K 154 0 ether_multi 1 0K 0K 166960K 3 0 mrt 0 0K 0K 166960K 6 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 229 1023K 1023K 166960K 229 0 exec 0 0K 1K 166960K 480 0 fusefs mount 1 32K 32K 166960K 1 0 tdb 3 0K 0K 166960K 3 0 VM swap 8 62K 64K 166960K 10 0 UVM amap 244 160K 173K 166960K 6444 0 UVM aobj 12 3K 3K 166960K 13 0 pinsyscall 43 86K 102K 166960K 1705 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 30 0 NDP 13 0K 2K 166960K 51 0 temp 45 8643K 8710K 166960K 22820 0 kqueue 16 26K 30K 166960K 96 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 64 0 61 1 0 1 1 0 8 0 rtentry 176 133 0 61 5 0 5 5 0 8 0 unpcb 144 359 0 340 2 0 2 2 0 8 1 syncache 336 4 0 4 1 1 0 1 0 8 0 tcpqe 32 1 0 1 1 1 0 1 0 8 0 tcpcb 736 106 0 100 3 1 2 2 0 8 1 arp 128 14 0 5 1 0 1 1 0 8 0 inpcb 328 601 0 589 12 5 7 7 0 8 5 nd6 144 23 0 10 1 0 1 1 0 8 0 pkpcb 40 2 0 2 2 1 1 1 0 8 1 kcovpl 48 11 0 3 1 0 1 1 0 8 0 mppekey 1024 1 0 1 1 0 1 1 0 8 1 ppxss 1192 15 0 15 2 1 1 1 0 8 1 pffrag 232 4 0 0 1 0 1 1 0 482 0 pffrnode 88 3 0 0 1 0 1 1 0 8 0 pffrent 40 4 0 0 1 0 1 1 0 8 0 pfosfp 40 1429 0 1005 5 0 5 5 0 8 0 pfosfpen 112 1429 0 714 21 0 21 21 0 8 0 pfstitem 24 35 0 1 1 0 1 1 0 8 0 pfstkey 128 35 0 1 2 0 2 2 0 8 0 pfstate 384 35 0 1 4 0 4 4 0 8 0 pfrule 1344 26 0 21 2 1 1 2 0 8 0 rttmr 136 3 0 3 2 2 0 1 0 8 0 art_heap8 4096 2 0 0 2 0 2 2 0 8 0 art_heap4 256 631 0 260 28 4 24 28 0 8 0 art_table 40 633 0 260 5 0 5 5 0 8 0 art_node 32 130 0 68 1 0 1 1 0 8 0 sysvmsgpl 40 1 0 1 1 1 0 1 0 8 0 semapl 112 82 0 72 1 0 1 1 0 8 0 shmpl 112 10 0 1 1 0 1 1 0 8 0 dirhash 1024 21 0 4 3 0 3 3 0 8 0 dino2pl 256 2388 0 869 96 0 96 96 0 8 0 ffsino 296 2388 0 869 118 0 118 118 0 8 0 nchpl 144 3096 0 1397 64 0 64 64 0 8 0 rtmask 32 4 0 4 2 1 1 1 0 8 1 uvmvnodes 80 2656 0 0 55 0 55 55 0 8 0 vnodes 216 2656 0 0 148 0 148 148 0 8 0 namei 1024 10632 0 10631 2 1 1 2 0 8 0 percpumem 16 72 0 22 1 0 1 1 0 8 0 kstatmem 264 62 0 32 3 0 3 3 0 8 0 scsiplug 72 4 0 4 2 2 0 1 0 8 0 scxspl 216 15477 0 15475 4 2 2 2 1 8 1 plimitpl 152 189 0 168 1 0 1 1 0 8 0 sigapl 424 864 0 808 9 2 7 9 0 8 0 knotepl 120 374 0 0 12 0 12 12 0 8 0 kqueuepl 224 173 0 157 3 1 2 2 0 8 1 pipepl 344 154 0 127 3 0 3 3 0 8 0 fdescpl 528 819 0 787 3 0 3 3 0 8 0 filepl 160 4704 0 4467 16 2 14 14 0 8 1 lockfpl 104 175 0 171 1 0 1 1 0 8 0 lockfspl 48 80 0 76 1 0 1 1 0 8 0 sessionpl 144 26 0 17 1 0 1 1 0 8 0 pgrppl 48 40 0 23 1 0 1 1 0 8 0 ucredpl 104 1012 0 999 1 0 1 1 0 8 0 zombiepl 144 810 0 808 1 0 1 1 0 8 0 processpl 1232 864 0 808 6 1 5 6 0 8 0 procpl 664 1493 0 1427 9 2 7 8 0 8 0 sosppl 168 4 0 4 1 0 1 1 0 8 1 sockpl 752 1030 0 996 17 7 10 11 0 8 5 mcl64k 65536 2 0 0 1 0 1 1 0 8 0 mcl8k 8192 1 0 0 1 0 1 1 0 8 0 mcl4k 4096 119 0 0 15 0 15 15 0 8 0 mcl2k 2048 30 0 0 4 0 4 4 0 8 0 mtagpl 96 4 0 0 1 0 1 1 0 8 0 mbufpl 256 160 0 0 10 0 10 10 0 8 0 bufpl 280 6632 0 489 439 0 439 439 0 8 0 anonpl 32 7933 0 0 65 1 64 64 0 246 0 amapchunkpl 152 20308 0 19799 31 3 28 28 0 158 6 amappl16 200 3262 0 3173 18 4 14 15 0 8 8 amappl15 192 8 0 8 2 2 0 1 0 8 0 amappl14 184 121 0 109 1 0 1 1 0 8 0 amappl13 176 6 0 6 2 2 0 1 0 8 0 amappl12 168 1508 0 1477 3 1 2 2 0 8 0 amappl11 160 54 0 40 1 0 1 1 0 8 0 amappl10 152 10 0 10 1 1 0 1 0 8 0 amappl9 144 253 0 253 1 1 0 1 0 8 0 amappl8 136 27 0 24 1 0 1 1 0 8 0 amappl7 128 114 0 102 1 0 1 1 0 8 0 amappl6 120 204 0 201 1 0 1 1 0 8 0 amappl5 112 159 0 149 1 0 1 1 0 8 0 amappl4 104 301 0 282 1 0 1 1 0 8 0 amappl3 96 3832 0 3718 4 0 4 4 0 8 0 amappl2 88 682 0 615 2 0 2 2 0 8 0 amappl1 80 10303 0 9699 15 0 15 15 0 8 0 amappl 88 5668 0 5496 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 6 0 6 1 1 0 1 0 8 0 dma128 128 254 0 254 2 2 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 24 819 0 787 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 819 0 787 1 0 1 1 0 8 0 vmmpekpl 168 7987 0 7933 3 0 3 3 0 8 0 vmmpepl 168 58009 0 55921 101 2 99 101 0 357 4 vmsppl 488 818 0 787 6 1 5 5 0 8 0 rwobjpl 80 21021 0 17354 75 0 75 75 0 8 0 pdppl 4096 1646 0 1574 100 28 72 84 0 8 0 pvpl 32 15760 0 0 128 0 128 128 0 265 0 pmappl 256 818 0 787 3 0 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 273 0 37 8 0 8 8 0 8 0 ddb{1}> machine ddbcpu 0 Stopped at x86_ipi_db+0x27: addq $0x8,%rsp x86_ipi_db(ffffffff83827ff0) 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(ffffffff838d3f40) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:134 [inline] __mp_lock(ffffffff838d3f40) at __mp_lock+0x192 sys/kern/kern_lock.c:165 softintr_dispatch(2) at softintr_dispatch+0x125 sys/kern/kern_softintr.c:83 dosoftint(2) at dosoftint+0x54 sys/arch/amd64/amd64/intr.c:847 Xsofttty() at Xsofttty+0x27 __mp_lock(ffffffff838d3f40) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:134 [inline] __mp_lock(ffffffff838d3f40) at __mp_lock+0x192 sys/kern/kern_lock.c:165 intr_handler(ffff80003c487800,ffff800000079a80) at intr_handler+0xe9 sys/arch/amd64/amd64/intr.c:559 Xintr_ioapic_edge23_untramp() at Xintr_ioapic_edge23_untramp+0x18f pool_cache_put(ffffffff83878608,fffffd8067c27a60) at pool_cache_put+0xd3 pool_cache_enter sys/kern/subr_pool.c:1860 [inline] pool_cache_put(ffffffff83878608,fffffd8067c27a60) at pool_cache_put+0xd3 sys/kern/subr_pool.c:1937 pmap_enter(fffffd806b763500,b9de17f9000,7d847000,3,22) at pmap_enter+0xdff sys/arch/amd64/amd64/pmap.c:2963 uvm_fault_upper(ffff80003c487bc0,ffff80003c487bf8,ffff80003c487ac0) at uvm_fault_upper+0x338 sys/uvm/uvm_fault.c:1161 uvm_fault(fffffd800cb9f7c0,b9de17f9000,0,2) at uvm_fault+0x198 sys/uvm/uvm_fault.c:685 end trace frame: 0xffff80003c487cf0, count: 0 ddb{0}> trace x86_ipi_db(ffffffff83827ff0) 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(ffffffff838d3f40) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:134 [inline] __mp_lock(ffffffff838d3f40) at __mp_lock+0x192 sys/kern/kern_lock.c:165 softintr_dispatch(2) at softintr_dispatch+0x125 sys/kern/kern_softintr.c:83 dosoftint(2) at dosoftint+0x54 sys/arch/amd64/amd64/intr.c:847 Xsofttty() at Xsofttty+0x27 __mp_lock(ffffffff838d3f40) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:134 [inline] __mp_lock(ffffffff838d3f40) at __mp_lock+0x192 sys/kern/kern_lock.c:165 intr_handler(ffff80003c487800,ffff800000079a80) at intr_handler+0xe9 sys/arch/amd64/amd64/intr.c:559 Xintr_ioapic_edge23_untramp() at Xintr_ioapic_edge23_untramp+0x18f pool_cache_put(ffffffff83878608,fffffd8067c27a60) at pool_cache_put+0xd3 pool_cache_enter sys/kern/subr_pool.c:1860 [inline] pool_cache_put(ffffffff83878608,fffffd8067c27a60) at pool_cache_put+0xd3 sys/kern/subr_pool.c:1937 pmap_enter(fffffd806b763500,b9de17f9000,7d847000,3,22) at pmap_enter+0xdff sys/arch/amd64/amd64/pmap.c:2963 uvm_fault_upper(ffff80003c487bc0,ffff80003c487bf8,ffff80003c487ac0) at uvm_fault_upper+0x338 sys/uvm/uvm_fault.c:1161 uvm_fault(fffffd800cb9f7c0,b9de17f9000,0,2) at uvm_fault+0x198 sys/uvm/uvm_fault.c:685 upageflttrap(ffff80003c487d50,b9de17f9980) at upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:192 usertrap(ffff80003c487d50) at usertrap+0x3c6 sys/arch/amd64/amd64/trap.c:605 recall_trap() at recall_trap+0x8 end of kernel end trace frame: 0x74b9aef80d40, count: -17 ddb{0}> machine ddbcpu 1 Stopped at savectx+0xae: movl $0,%gs:0x688 savectx() at savectx+0xae end of kernel end trace frame: 0x757d86a73800, count: 14 ddb{1}> trace savectx() at savectx+0xae end of kernel end trace frame: 0x757d86a73800, count: -1