uvm_fault(0xfffffd805e5c0210, 0x0, 0, 1) -> e fatal page fault in supervisor mode trap type 6 code 0 rip ffffffff82976f88 cs 8 rflags 10207 cr2 0 cpl 0 rsp ffff80003c4a9250 gsbase 0xffff8000299edff0 kgsbase 0x0 panic: trap type 6, code=0, pc=ffffffff82976f88 Starting stack trace... panic(ffffffff833a304a) at panic+0x1d0 sys/kern/subr_prf.c:229 kerntrap(ffff80003c4a91a0) at kerntrap+0x30b alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b dt_ioctl_record_stop(ffff8000015bb000) at dt_ioctl_record_stop+0x108 sys/dev/dt/dt_dev.c:586 dtioctl(21e5f,80044403,ffff80003c4a94e0,81,ffff80002a3d7a38) at dtioctl+0x536 sys/dev/dt/dt_dev.c:318 VOP_IOCTL(fffffd806b61a480,80044403,ffff80003c4a94e0,81,fffffd80097fb270,ffff80002a3d7a38) at VOP_IOCTL+0xac sys/kern/vfs_vops.c:264 vn_ioctl(fffffd806b950a60,80044403,ffff80003c4a94e0,ffff80002a3d7a38) at vn_ioctl+0xf8 sys/kern/vfs_vnops.c:531 sys_ioctl(ffff80002a3d7a38,ffff80003c4a96c0,ffff80003c4a9610) at sys_ioctl+0x674 sys/kern/sys_generic.c:-1 syscall(ffff80003c4a96c0) at syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003c4a96c0) at syscall+0xbd4 sys/arch/amd64/amd64/trap.c:746 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x9386a5140e0, count: 247 End of stack trace. WARNING: SP L NOT LOWERED ON SYSCALL 83 -1885833760 EXIT 0 4 Stopped at savectx+0xae: movl $0,%gs:0x688 TID PID UID PRFLAGS PFLAGS CPU COMMAND *201143 38155 0 0 0x4000000 1 syz-executor 6918 15905 0 0x14000 0x40000200 0 softclock savectx() at savectx+0xae end of kernel end trace frame: 0x9385d435c50, 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(0xfffffd805e5c0210, 0x0, 0, 1) -> e ddb{1}> trace savectx() at savectx+0xae end of kernel end trace frame: 0x9385d435c50, count: -1 ddb{1}> show registers rdi 0 rsi 0 rbp 0xffff80003c4cbb40 rbx 0 rdx 0 rcx 0xffff80002a3d7270 rax 0x3c r8 0xffff80003c4cba70 r9 0x1 r10 0x9fd100a9220bf4c4 r11 0x9407938353ba9574 r12 0 r13 0 r14 0xffff80002a3d7270 r15 0 rip 0xffffffff824203ee savectx+0xae cs 0x8 rflags 0x46 rsp 0xffff80003c4cbac0 ss 0x10 savectx+0xae: movl $0,%gs:0x688 ddb{1}> show proc PROC (syz-executor) tid=201143 pid=38155 tcnt=3 stat=onproc flags process=0 proc=4000000 runpri=32, usrpri=84, slppri=32, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff80002a3d6578,0xffff80002a3d6fe8 process=0xffff80003c4a1368 user=0xffff80003c4c6000, vmspace=0xfffffd805e5c0210 estcpu=34, cpticks=1, pctcpu=0.0, user=0, sys=1, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 18106 50476 25763 0 2 0 syz-executor 42773 132852 20563 0 2 0 syz-executor 42773 161951 20563 0 2 0x4000000 syz-executor 14749 485307 33070 0 2 0xc80 syz-executor 14749 51836 33070 0 3 0x4000080 fsleep syz-executor 38155 424975 25174 0 2 0 syz-executor 38155 136359 25174 0 3 0x4000000 sbar syz-executor *38155 201143 25174 0 7 0x4000000 syz-executor 75275 399880 19404 0 2 0 syz-executor 75275 390470 19404 0 2 0x4000000 syz-executor 86382 70324 7539 0 2 0 syz-executor 86382 329200 7539 0 3 0x4000000 vmmaplk syz-executor 86382 405652 7539 0 2 0x4000000 syz-executor 72886 492560 98591 0 2 0xc80 syz-executor 72886 89942 98591 0 3 0x4000080 ttyout syz-executor 72886 306843 98591 0 3 0x4000080 fsleep syz-executor 20563 159777 99595 0 2 0xc82 syz-executor 87069 67358 0 0 3 0x14200 acct acct 80201 202006 0 0 3 0x14280 nfsidl nfsio 82554 153362 0 0 3 0x14280 nfsidl nfsio 30167 15340 0 0 3 0x14280 nfsidl nfsio 12984 89361 0 0 3 0x14280 nfsidl nfsio 46202 129270 0 0 3 0x14280 nfsidl nfsio 25668 515471 0 0 3 0x14280 nfsidl nfsio 79510 287259 0 0 3 0x14280 nfsidl nfsio 46983 317495 0 0 3 0x14280 nfsidl nfsio 32746 165756 0 0 3 0x14280 nfsidl nfsio 93219 343567 0 0 3 0x14280 nfsidl nfsio 70473 361283 0 0 3 0x14280 nfsidl nfsio 86037 18112 0 0 3 0x14280 nfsidl nfsio 13746 413471 0 0 3 0x14280 nfsidl nfsio 2487 2864 0 0 3 0x14280 nfsidl nfsio 84407 316014 0 0 3 0x14280 nfsidl nfsio 47530 282715 0 0 3 0x14280 nfsidl nfsio 97827 522893 0 0 3 0x14280 nfsidl nfsio 30616 422358 0 0 3 0x14280 nfsidl nfsio 22011 339194 0 0 3 0x14280 nfsidl nfsio 60331 521952 0 0 3 0x14280 nfsidl nfsio 25174 459667 99595 0 2 0xc82 syz-executor 98591 19013 99595 0 2 0xc82 syz-executor 28504 47980 1 0 2 0x100083 getty 20537 408172 0 0 3 0x14200 bored sosplice 33070 78761 99595 0 2 0xc82 syz-executor 25763 115817 99595 0 2 0xc82 syz-executor 47789 401337 99595 0 2 0x2 syz-executor 7539 69177 99595 0 2 0xc82 syz-executor 19404 486408 99595 0 2 0xc82 syz-executor 99595 394959 15158 0 3 0x82 kqread syz-executor 15158 290954 88968 0 3 0x10008a sigsusp ksh 88968 327957 17468 0 3 0x98 kqread sshd-session 17468 101500 22105 0 3 0x92 kqread sshd-session 22105 430766 1 0 3 0x88 kqread sshd 18310 470616 63017 74 3 0x1100092 bpf pflogd 63017 343299 1 0 3 0x80 sbwait pflogd 88530 498423 56464 73 3 0x1100090 kqread syslogd 56464 502660 1 0 3 0x100082 sbwait syslogd 71260 17073 1 0 3 0x100080 kqread resolvd 99141 472742 42367 77 3 0x100092 kqread dhcpleased 46284 58308 42367 77 3 0x100092 kqread dhcpleased 42367 189915 1 0 3 0x80 kqread dhcpleased 43016 11290 0 0 3 0x14200 bored smr 23706 314505 0 0 2 0x14200 zerothread 16812 20488 0 0 3 0x14200 aiodoned aiodoned 84372 401273 0 0 3 0x14200 syncer update 86971 515850 0 0 3 0x14200 cleaner cleaner 95417 257019 0 0 3 0x14200 reaper reaper 882 400906 0 0 3 0x14200 pgdaemon pagedaemon 79022 136653 0 0 3 0x14200 bored viomb 75542 386171 0 0 3 0x40014200 acpi0 acpi0 41391 166737 0 0 3 0x40014200 idle1 33982 79439 0 0 3 0x14200 bored softnet7 39465 31244 0 0 3 0x14200 bored softnet6 50531 396610 0 0 3 0x14200 bored softnet5 86862 300044 0 0 3 0x14200 bored softnet4 34441 485523 0 0 3 0x14200 bored softnet3 19336 169800 0 0 3 0x14200 bored softnet2 76309 296588 0 0 3 0x14200 bored softnet1 68573 205736 0 0 2 0x14200 softnet0 82018 479446 0 0 2 0x14200 systqmp 23354 318097 0 0 3 0x14200 bored systq 13173 151157 0 0 2 0x14200 softclockmp 15905 6918 0 0 7 0x40014200 softclock 48205 274997 0 0 3 0x40014200 idle0 1 57294 0 0 3 0x82 wait init 0 0 -1 0 3 0x10010200 scheduler swapper ddb{1}> show all locks Process 38155 (syz-executor) thread 0xffff80002a3d7a38 (136359) exclusive rwlock dtlk r = 0 (0xffffffff83812598) #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 dt_ioctl_record_stop+0x2e sys/dev/dt/dt_dev.c:565 #3 dtioctl+0x536 sys/dev/dt/dt_dev.c:318 #4 VOP_IOCTL+0xac sys/kern/vfs_vops.c:264 #5 vn_ioctl+0xf8 sys/kern/vfs_vnops.c:531 #6 sys_ioctl+0x674 sys/kern/sys_generic.c:-1 #7 syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline] #7 syscall+0xbd4 sys/arch/amd64/amd64/trap.c:746 #8 Xsyscall+0x128 exclusive kernel_lock &kernel_lock r = 0 (0xffffffff8398d718) #0 witness_lock+0x5f1 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5f1 sys/kern/subr_witness.c:1160 #1 vn_ioctl+0x4d sys/kern/vfs_vnops.c:514 #2 sys_ioctl+0x674 sys/kern/sys_generic.c:-1 #3 syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline] #3 syscall+0xbd4 sys/arch/amd64/amd64/trap.c:746 #4 Xsyscall+0x128 Process 75275 (syz-executor) thread 0xffff8000ffff3c98 (390470) exclusive rwlock vmmaplk r = 0 (0xfffffd805e5c08c8) #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 vm_map_lock_ln+0x12e sys/uvm/uvm_map.c:5168 #3 uvmfault_lookup+0xe8 sys/uvm/uvm_fault.c:1918 #4 uvm_fault_check+0x895 uvmfault_amapcopy sys/uvm/uvm_fault.c:235 [inline] #4 uvm_fault_check+0x895 sys/uvm/uvm_fault.c:784 #5 uvm_fault+0x106 sys/uvm/uvm_fault.c:677 #6 upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:192 #7 usertrap+0x3c6 sys/arch/amd64/amd64/trap.c:603 #8 recall_trap+0x8 Process 86382 (syz-executor) thread 0xffff800039821790 (329200) exclusive rrwlock inode r = 0 (0xfffffd800efd3da0) #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:746 #9 Xsyscall+0x128 Process 86382 (syz-executor) thread 0xffff80002a3d7cd0 (405652) exclusive rwlock vmmaplk r = 0 (0xfffffd805e5c0c98) #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 vm_map_lock_ln+0x12e sys/uvm/uvm_map.c:5168 #3 uvm_map_protect+0xe0 sys/uvm/uvm_map.c:3064 #4 sys_mprotect+0x351 sys/uvm/uvm_mmap.c:590 #5 syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline] #5 syscall+0xbd4 sys/arch/amd64/amd64/trap.c:746 #6 Xsyscall+0x128 ddb{1}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10243 11083K 11907K 166960K 12593 0 pcb 18 14K 16K 166960K 434 0 rtable 202 13K 13K 166960K 560 0 pf 47 20K 131091K 166960K 281 0 ifaddr 40 7K 8K 166960K 163 0 ifgroup 70 2K 3K 166960K 281 0 sysctl 3 1K 9K 166960K 21 0 counters 74 37K 38K 166960K 460 0 ioctlops 0 0K 8K 166960K 1998 0 iov 0 0K 28K 166960K 89 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1406 88K 89K 166960K 2613 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 9K 166960K 31 0 VM map 2 1K 1K 166960K 2 0 sem 12 0K 0K 166960K 128 0 dirhash 12 2K 3K 166960K 45 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 17 61K 240K 166960K 1700 0 sigio 0 0K 0K 166960K 166 0 proc 72 115K 196K 166960K 830 0 subproc 72 4K 4K 166960K 103 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 236 0 in_multi 76 5K 7K 166960K 252 0 ether_multi 1 0K 0K 166960K 35 0 mrt 2 0K 0K 166960K 13 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 109 493K 493K 166960K 109 0 exec 0 0K 1K 166960K 819 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 233 168K 195K 166960K 17157 0 UVM aobj 94 3K 3K 166960K 102 0 pinsyscall 42 84K 104K 166960K 2886 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 1 0K 0K 166960K 104 0 NDP 15 0K 2K 166960K 117 0 temp 80 8652K 8728K 166960K 79605 0 kqueue 13 20K 33K 166960K 373 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 120 286 0 283 5 4 1 3 0 8 0 rtentry 176 171 0 101 4 0 4 4 0 8 0 unpcb 144 1403 0 1386 16 13 3 6 0 8 2 syncache 336 12 0 12 4 4 0 1 0 8 0 tcpqe 32 5 0 5 3 3 0 1 0 8 0 tcpcb 736 714 0 706 20 15 5 7 0 8 4 arp 128 17 0 9 1 0 1 1 0 8 0 ipq 40 1 0 1 1 1 0 1 0 8 0 ipqe 40 3 0 3 1 1 0 1 0 8 0 inpcb 328 1891 0 1877 20 15 5 10 0 8 3 nd6 144 26 0 11 1 0 1 1 0 8 0 pkpcb 40 14 0 14 5 5 0 1 0 8 0 kcovpl 48 11 0 3 1 0 1 1 0 8 0 ppxss 1192 173 0 173 3 2 1 1 0 8 1 pppxif 1504 9 0 9 4 4 0 2 0 8 0 pfstscr 40 3 0 3 1 1 0 1 0 8 0 pffrag 232 11 0 3 1 0 1 1 0 482 0 pffrnode 88 8 0 2 1 0 1 1 0 8 0 pffrent 40 18 0 7 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 3 0 3 3 3 0 1 0 8 0 pfanchor 1288 6 0 1 2 1 1 1 0 8 0 pftag 88 3 0 3 2 2 0 1 0 8 0 pfstitem 24 139 0 42 1 0 1 1 0 8 0 pfstkey 128 151 0 57 4 0 4 4 0 8 0 pfstate 384 141 0 49 10 0 10 10 0 8 0 pfrule 1344 31 0 25 2 1 1 2 0 8 0 rttmr 136 3 0 3 2 2 0 1 0 8 0 art_heap8 4096 5 0 1 5 1 4 4 0 8 0 art_heap4 256 902 0 585 34 13 21 30 0 8 0 art_table 40 907 0 586 5 1 4 5 0 8 0 art_node 32 166 0 107 1 0 1 1 0 8 0 sysvmsgpl 40 11 0 3 1 0 1 1 0 8 0 semapl 112 126 0 116 1 0 1 1 0 8 0 shmpl 112 99 0 8 3 0 3 3 0 8 0 dirhash 1024 39 0 22 3 0 3 3 0 8 0 dino2pl 256 4789 0 3275 96 0 96 96 0 8 0 ffsino 296 4789 0 3275 118 0 118 118 0 8 0 nchpl 144 7151 0 6596 64 39 25 64 0 8 0 rtmask 32 26 0 26 4 4 0 1 0 8 0 uvmvnodes 80 5315 0 0 109 0 109 109 0 8 0 vnodes 216 5315 0 0 296 0 296 296 0 8 0 namei 1024 26652 0 26651 4 3 1 2 0 8 0 percpumem 16 245 0 193 1 0 1 1 0 8 0 kstatmem 264 194 0 158 4 1 3 3 0 8 0 scsiplug 72 4 0 4 2 2 0 1 0 8 0 scxspl 216 39294 0 39294 13 12 1 8 1 8 1 plimitpl 152 415 0 398 1 0 1 1 0 8 0 sigapl 424 2025 0 1950 11 2 9 9 0 8 0 knotepl 120 1030 0 0 31 0 31 31 0 8 0 kqueuepl 224 736 0 727 8 7 1 5 0 8 0 pipepl 344 293 0 266 9 6 3 9 0 8 0 fdescpl 528 1955 0 1924 3 0 3 3 0 8 0 filepl 160 14144 0 13922 33 16 17 21 0 8 4 lockfpl 104 606 0 604 2 1 1 2 0 8 0 lockfspl 48 261 0 259 1 0 1 1 0 8 0 sessionpl 144 36 0 27 1 0 1 1 0 8 0 pgrppl 48 71 0 54 1 0 1 1 0 8 0 ucredpl 104 2238 0 2224 1 0 1 1 0 8 0 zombiepl 144 2700 0 2700 1 0 1 1 0 8 1 processpl 1232 2025 0 1950 7 1 6 6 0 8 0 procpl 664 4701 0 4617 10 2 8 9 0 8 0 sosppl 168 16 0 16 5 5 0 1 0 8 0 sockpl 752 3636 0 3602 47 35 12 24 0 8 7 mcl64k 65536 18 0 0 3 0 3 3 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 3 0 0 1 0 1 1 0 8 0 mcl4k 4096 118 0 0 15 0 15 15 0 8 0 mcl2k 2048 31 0 0 4 0 4 4 0 8 0 mtagpl 96 6 0 0 1 0 1 1 0 8 0 mbufpl 256 281 0 0 18 0 18 18 0 8 0 bufpl 280 16117 0 9974 441 1 440 440 0 8 0 anonpl 32 12640 0 0 102 0 102 102 0 246 0 amapchunkpl 152 59087 0 58626 51 24 27 32 0 158 6 amappl16 200 6881 0 6830 63 49 14 31 0 8 8 amappl15 192 8 0 8 3 2 1 1 0 8 1 amappl14 184 134 0 122 1 0 1 1 0 8 0 amappl13 176 1 0 1 1 1 0 1 0 8 0 amappl12 168 2662 0 2631 3 1 2 2 0 8 0 amappl11 160 63 0 49 1 0 1 1 0 8 0 amappl10 152 10 0 9 1 0 1 1 0 8 0 amappl9 144 258 0 258 1 1 0 1 0 8 0 amappl8 136 26 0 24 1 0 1 1 0 8 0 amappl7 128 122 0 110 1 0 1 1 0 8 0 amappl6 120 236 0 233 1 0 1 1 0 8 0 amappl5 112 137 0 127 1 0 1 1 0 8 0 amappl4 104 341 0 320 1 0 1 1 0 8 0 amappl3 96 10218 0 10128 4 1 3 4 0 8 0 amappl2 88 2271 0 2191 3 1 2 3 0 8 0 amappl1 80 16970 0 16359 17 1 16 16 0 8 0 amappl 88 16078 0 15919 5 0 5 5 0 92 0 dma4096 4096 1 0 1 1 1 0 1 0 8 0 dma2048 2048 2 0 2 2 1 1 1 0 8 1 dma1024 1024 2 0 1 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 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 19 0 18 1 0 1 1 0 8 0 aobjpl 72 101 0 8 2 0 2 2 0 8 0 uaddrrnd 24 1955 0 1924 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 1955 0 1924 1 0 1 1 0 8 0 vmmpekpl 168 17444 0 17399 3 0 3 3 0 8 0 vmmpepl 168 130619 0 128598 135 21 114 117 0 357 16 vmsppl 488 1954 0 1924 6 1 5 5 0 8 0 rwobjpl 80 41428 0 35076 130 0 130 130 0 8 0 pdppl 4096 3918 0 3848 115 43 72 86 0 8 2 pvpl 32 21075 0 0 170 0 170 170 0 265 0 pmappl 256 1954 0 1924 3 0 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 332 0 83 8 0 8 8 0 8 0 ddb{1}> machine ddbcpu 0 Stopped at x86_ipi_db+0x27: addq $0x8,%rsp x86_ipi_db(ffffffff837b5ff0) 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(ffffffff8398d510) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:134 [inline] __mp_lock(ffffffff8398d510) at __mp_lock+0x192 sys/kern/kern_lock.c:165 intr_handler(ffff80002a208560,ffff800000069c00) at intr_handler+0xe9 sys/arch/amd64/amd64/intr.c:559 Xintr_ioapic_edge16_untramp() at Xintr_ioapic_edge16_untramp+0x18f __mp_lock(ffffffff8398d510) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:134 [inline] __mp_lock(ffffffff8398d510) at __mp_lock+0x192 sys/kern/kern_lock.c:165 __mp_acquire_count(ffffffff8398d510,1) at __mp_acquire_count+0x58 sys/kern/kern_lock.c:-1 sleep_finish(ffffffffffffffff,1) at sleep_finish+0x2d8 sys/kern/kern_synch.c:367 softclock_thread_run(ffffffff8379e828) at softclock_thread_run+0x79 sys/kern/kern_timeout.c:836 softclock_thread(ffff8000ffffecf8) at softclock_thread+0x10a sys/kern/kern_timeout.c:858 end trace frame: 0x0, count: 4 ddb{0}> trace x86_ipi_db(ffffffff837b5ff0) 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(ffffffff8398d510) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:134 [inline] __mp_lock(ffffffff8398d510) at __mp_lock+0x192 sys/kern/kern_lock.c:165 intr_handler(ffff80002a208560,ffff800000069c00) at intr_handler+0xe9 sys/arch/amd64/amd64/intr.c:559 Xintr_ioapic_edge16_untramp() at Xintr_ioapic_edge16_untramp+0x18f __mp_lock(ffffffff8398d510) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:134 [inline] __mp_lock(ffffffff8398d510) at __mp_lock+0x192 sys/kern/kern_lock.c:165 __mp_acquire_count(ffffffff8398d510,1) at __mp_acquire_count+0x58 sys/kern/kern_lock.c:-1 sleep_finish(ffffffffffffffff,1) at sleep_finish+0x2d8 sys/kern/kern_synch.c:367 softclock_thread_run(ffffffff8379e828) at softclock_thread_run+0x79 sys/kern/kern_timeout.c:836 softclock_thread(ffff8000ffffecf8) at softclock_thread+0x10a sys/kern/kern_timeout.c:858 end trace frame: 0x0, count: -11 ddb{0}> machine ddbcpu 1 Stopped at savectx+0xae: movl $0,%gs:0x688 savectx() at savectx+0xae end of kernel end trace frame: 0x9385d435c50, count: 14 ddb{1}> trace savectx() at savectx+0xae end of kernel end trace frame: 0x9385d435c50, count: -1