uvm_fault(0xfffffd8073a589b0, 0x0, 0, 1) -> e fatal page fault in supervisor mode trap type 6 code 0 rip ffffffff81eb4db8 cs 8 rflags 10207 cr2 0 cpl 0 rsp ffff800030c1eb50 gsbase 0xffff8000299edff0 kgsbase 0x0 panic: trap type 6, code=0, pc=ffffffff81eb4db8 Starting stack trace... panic(ffffffff833bcb76) at panic+0x1d0 sys/kern/subr_prf.c:229 kerntrap(ffff800030c1eaa0) at kerntrap+0x30b alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b dt_ioctl_record_stop(ffff80000161c000) at dt_ioctl_record_stop+0x108 sys/dev/dt/dt_dev.c:593 dtclose(11e5f,81,2000,ffff8000fffef240) at dtclose+0x109 dt_pcb_purge sys/dev/dt/dt_dev.c:-1 [inline] dtclose(11e5f,81,2000,ffff8000fffef240) at dtclose+0x109 sys/dev/dt/dt_dev.c:239 spec_close(ffff800030c1ec50) at spec_close+0x466 sys/kern/spec_vnops.c:-1 VOP_CLOSE(fffffd805b566d80,81,fffffd80097fb618,ffff8000fffef240) at VOP_CLOSE+0x132 sys/kern/vfs_vops.c:156 vn_closefile(fffffd806cc2c168,ffff8000fffef240) at vn_closefile+0x12b vn_close sys/kern/vfs_vnops.c:292 [inline] vn_closefile(fffffd806cc2c168,ffff8000fffef240) at vn_closefile+0x12b sys/kern/vfs_vnops.c:615 fdrop(fffffd806cc2c168,ffff8000fffef240) at fdrop+0x121 sys/kern/kern_descrip.c:1280 closef(fffffd806cc2c168,ffff8000fffef240) at closef+0x192 sys/kern/kern_descrip.c:1264 fdfree(ffff8000fffef240) at fdfree+0x116 sys/kern/kern_descrip.c:1195 exit1(ffff8000fffef240,0,0,1) at exit1+0x576 sys/kern/kern_exit.c:215 sys_exit(ffff8000fffef240,ffff800030c1efc0,ffff800030c1ef10) at sys_exit+0x1a sys/kern/kern_exit.c:-1 syscall(ffff800030c1efc0) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff800030c1efc0) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:748 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x754fda436d10, count: 242 End of stack trace. WARNING: SPL NOT LOWERED ON TRAP EXIT 4 0 Stopped at proc_trampoline+0xc7: movl $0,%gs:0x688 TID PID UID PRFLAGS PFLAGS CPU COMMAND *434898 11671 0 0 0 1 syz-executor 24142 66611 0 0 0 0 syz-executor proc_trampoline() at proc_trampoline+0xc7 end of kernel end trace frame: 0x77196a8aea50, 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(0xfffffd8073a589b0, 0x0, 0, 1) -> e ddb{1}> trace proc_trampoline() at proc_trampoline+0xc7 end of kernel end trace frame: 0x77196a8aea50, count: -1 ddb{1}> show registers rdi 0 rsi 0 rbp 0xffff80002a328290 rbx 0 rdx 0 rcx 0xffff8000fffeed10 rax 0x2a r8 0xffff80002a3281c0 r9 0x1 r10 0x5cf2c1598304acd2 r11 0x62cccc9d05ef9a9d r12 0 r13 0xffffffff82dcd3a8 Xdoreti+0x18 r14 0 r15 0 rip 0xffffffff822cd4c7 proc_trampoline+0xc7 cs 0x8 rflags 0x246 rsp 0xffff80002a328210 ss 0 proc_trampoline+0xc7: movl $0,%gs:0x688 ddb{1}> show proc PROC (syz-executor) tid=434898 pid=11671 tcnt=2 stat=onproc flags process=0 proc=0 runpri=86, usrpri=86, slppri=36, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff8000fffee7e0,0xffff8000fffee028 process=0xffff800030c2f518 user=0xffff80002a323000, vmspace=0xfffffd8073a583f8 estcpu=36, cpticks=1, pctcpu=0.0, user=0, sys=1, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND *11671 434898 38631 0 7 0 syz-executor 11671 109418 38631 0 3 0x4000080 fsleep syz-executor 54055 498623 71074 0 2 0 syz-executor 54055 158800 71074 0 3 0x4000080 fsleep syz-executor 54055 177245 71074 0 3 0x4000080 fsleep syz-executor 75897 179207 55577 0 2 0 syz-executor 75897 232344 55577 0 2 0x4000000 syz-executor 66611 24142 3100 0 7 0 syz-executor 66611 56181 3100 0 3 0x4000080 kqsel syz-executor 66611 342550 3100 0 3 0x4000080 kqsel syz-executor 66611 36684 3100 0 3 0x4000080 fsleep syz-executor 8990 238115 27272 0 3 0x3000 suspend syz-executor 8990 39247 27272 0 3 0x4081000 biowait syz-executor 8990 53416 27272 0 3 0x4081000 fltagain2 syz-executor 2712 314367 37017 0 3 0x82 nanoslp syz-executor 57062 269156 37017 0 2 0x2 syz-executor 37596 515979 37017 0 3 0x82 nanoslp syz-executor 3100 106387 37017 0 3 0x82 nanoslp syz-executor 38631 36598 37017 0 3 0x82 nanoslp syz-executor 55577 188230 37017 0 3 0x82 nanoslp syz-executor 41838 160686 0 0 3 0x14200 acct acct 69816 446168 0 0 3 0x14200 bored sosplice 27272 212142 37017 0 3 0x82 nanoslp syz-executor 71074 410338 37017 0 3 0x82 nanoslp syz-executor 37017 60314 34369 0 3 0x82 kqread syz-executor 34369 282762 28771 0 3 0x10008a sigsusp ksh 28771 60977 69336 0 3 0x98 kqread sshd-session 69336 407741 21482 0 3 0x92 kqread sshd-session 83889 253767 1 0 3 0x100083 ttyopn getty 21482 359339 1 0 3 0x88 kqread sshd 61824 315271 41458 74 3 0x1100092 bpf pflogd 41458 474430 1 0 3 0x80 sbwait pflogd 48267 305902 63383 73 3 0x1100090 kqread syslogd 63383 48947 1 0 3 0x100082 sbwait syslogd 78348 64636 1 0 3 0x100080 kqread resolvd 77509 212159 8012 77 3 0x100092 kqread dhcpleased 72306 96129 8012 77 3 0x100092 kqread dhcpleased 8012 245937 1 0 3 0x80 kqread dhcpleased 55463 335206 0 0 3 0x14200 bored smr 81761 185048 0 0 2 0x14200 zerothread 86247 452444 0 0 3 0x14200 aiodoned aiodoned 25913 416381 0 0 3 0x14200 syncer update 14259 127290 0 0 3 0x14200 cleaner cleaner 71839 414996 0 0 3 0x14200 kmmaplk reaper 41445 447213 0 0 3 0x14200 pgdaemon pagedaemon 14844 108909 0 0 3 0x14200 bored viomb 66446 59811 0 0 3 0x40014200 acpi0 acpi0 85722 177391 0 0 3 0x40014200 idle1 41298 392783 0 0 3 0x14200 bored softnet1 47594 429435 0 0 2 0x14200 softnet0 42932 458000 0 0 2 0x40014200 systqmp 16875 183759 0 0 3 0x14200 bored systq 42411 175284 0 0 3 0x14200 tmoslp softclockmp 1555 288998 0 0 3 0x40014200 tmoslp softclock 93559 63181 0 0 3 0x40014200 idle0 1 286921 0 0 3 0x82 wait init 0 0 -1 0 3 0x10010200 scheduler swapper ddb{1}> show all locks Process 75897 (syz-executor) thread 0xffff800037ff6560 (232344) exclusive rwlock kmmaplk r = 0 (0xffffffff8396a2e0) #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:5171 #3 uvm_unmap+0x7d sys/uvm/uvm_map.c:1792 #4 km_free+0x87 sys/uvm/uvm_km.c:831 #5 pipe_destroy+0x265 pipe_buffer_free sys/kern/sys_pipe.c:768 [inline] #5 pipe_destroy+0x265 sys/kern/sys_pipe.c:811 #6 pipe_close+0x43 sys/kern/sys_pipe.c:749 #7 fdrop+0x121 sys/kern/kern_descrip.c:1280 #8 dopipe+0x480 sys/kern/sys_pipe.c:224 #9 syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline] #9 syscall+0xbd4 sys/arch/amd64/amd64/trap.c:748 #10 Xsyscall+0x128 exclusive rwlock pipelk r = 0 (0xfffffd806c788ea8) #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 pipe_destroy+0x3b pipe_wakeup sys/kern/sys_pipe.c:-1 [inline] #2 pipe_destroy+0x3b sys/kern/sys_pipe.c:788 #3 pipe_close+0x43 sys/kern/sys_pipe.c:749 #4 fdrop+0x121 sys/kern/kern_descrip.c:1280 #5 dopipe+0x480 sys/kern/sys_pipe.c:224 #6 syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline] #6 syscall+0xbd4 sys/arch/amd64/amd64/trap.c:748 #7 Xsyscall+0x128 Process 8990 (syz-executor) thread 0xffff800037ffcd30 (39247) exclusive rrwlock inode r = 0 (0xfffffd805c939210) #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 57062 (syz-executor) thread 0xffff800037ffda28 (269156) exclusive rwlock vmmaplk r = 0 (0xfffffd8073a586e0) #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:5171 #3 uvmspace_fork+0x12b sys/uvm/uvm_map.c:3741 #4 process_new+0x577 sys/kern/kern_fork.c:281 #5 fork1+0x3f6 sys/kern/kern_fork.c:-1 #6 syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] #6 syscall+0xb17 sys/arch/amd64/amd64/trap.c:748 #7 Xsyscall+0x128 exclusive rwlock vmmaplk r = 0 (0xfffffd8073a588c8) #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:5171 #3 uvmspace_fork+0x44 sys/uvm/uvm_map.c:3732 #4 process_new+0x577 sys/kern/kern_fork.c:281 #5 fork1+0x3f6 sys/kern/kern_fork.c:-1 #6 syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] #6 syscall+0xb17 sys/arch/amd64/amd64/trap.c:748 #7 Xsyscall+0x128 ddb{1}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10210 11066K 12373K 166960K 13627 0 pcb 18 16K 18K 166960K 597 0 rtable 240 14K 15K 166960K 883 0 pf 36 18K 67486K 166960K 344 0 ifaddr 36 6K 8K 166960K 194 0 ifgroup 51 2K 2K 166960K 345 0 sysctl 4 1K 9K 166960K 36 0 counters 66 36K 38K 166960K 590 0 ioctlops 0 0K 5K 166960K 2083 0 iov 0 0K 32K 166960K 347 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1550 97K 98K 166960K 3381 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 9K 166960K 43 0 VM map 2 1K 1K 166960K 2 0 sem 27 10K 10K 166960K 212 0 dirhash 12 2K 3K 166960K 66 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 17 61K 240K 166960K 2512 0 sigio 0 0K 0K 166960K 73 0 proc 73 115K 164K 166960K 923 0 subproc 72 4K 4K 166960K 135 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 356 0 in_multi 74 5K 7K 166960K 275 0 ether_multi 1 0K 0K 166960K 33 0 mrt 1 0K 0K 166960K 13 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 97 440K 440K 166960K 97 0 exec 0 0K 1K 166960K 988 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 251 153K 167K 166960K 24246 0 UVM aobj 71 9K 9K 166960K 78 0 pinsyscall 42 84K 107K 166960K 3766 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 1K 166960K 144 0 NDP 11 0K 1K 166960K 147 0 temp 84 8656K 8909K 166960K 127394 0 kqueue 14 22K 30K 166960K 523 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 120 319 0 316 4 3 1 3 0 8 0 rtentry 176 249 0 161 6 0 6 6 0 8 0 unpcb 144 1848 0 1831 14 12 2 6 0 8 1 syncache 336 5 0 5 2 2 0 1 0 8 0 tcpqe 32 1 0 1 1 1 0 1 0 8 0 tcpcb 736 961 0 957 23 20 3 7 0 8 2 arp 136 44 0 23 1 0 1 1 0 8 0 inpcb 328 3019 0 3006 28 25 3 10 0 8 1 nd6 152 50 0 32 1 0 1 1 0 8 0 pkpcb 40 15 0 15 6 6 0 1 0 8 0 kcovpl 48 15 0 7 1 0 1 1 0 8 0 mppekey 1024 1 0 1 1 1 0 1 0 8 0 ppxss 1192 233 0 233 3 2 1 1 0 8 1 pppxif 1504 10 0 10 4 3 1 1 0 8 1 pfstscr 40 7 0 6 1 0 1 1 0 8 0 pffrag 232 72 0 67 1 0 1 1 0 482 0 pffrnode 88 49 0 44 1 0 1 1 0 8 0 pffrent 40 173 0 168 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 1 0 1 1 1 0 1 0 8 0 pfanchor 1288 2 0 0 1 0 1 1 0 8 0 pftag 88 3 0 0 1 0 1 1 0 8 0 pfstitem 24 94 0 76 1 0 1 1 0 8 0 pfstkey 128 105 0 89 2 0 2 2 0 8 0 pfstate 384 97 0 82 6 0 6 6 0 8 0 pfrule 1344 48 0 42 2 1 1 2 0 8 0 rttmr 136 2 0 2 2 2 0 1 0 8 0 art_heap8 4096 5 0 0 5 0 5 5 0 8 0 art_heap4 256 1094 0 730 37 13 24 29 0 8 0 art_table 40 1099 0 730 5 0 5 5 0 8 0 art_node 32 247 0 169 1 0 1 1 0 8 0 sysvmsgpl 40 16 0 10 1 0 1 1 0 8 0 semupl 112 3 0 3 2 2 0 1 0 8 0 semapl 112 208 0 183 1 0 1 1 0 8 0 shmpl 112 75 0 7 2 0 2 2 0 8 0 dirhash 1024 54 0 37 3 0 3 3 0 8 0 dino2pl 256 6153 0 4630 96 0 96 96 0 8 0 ffsino 296 6153 0 4630 118 0 118 118 0 8 0 nchpl 144 9534 0 7832 64 0 64 64 0 8 0 rtmask 32 32 0 32 6 5 1 1 0 8 1 vnodes 216 5926 0 0 330 0 330 330 0 8 0 namei 1024 34754 0 34754 1 0 1 1 0 8 1 percpumem 16 310 0 262 1 0 1 1 0 8 0 kstatmem 264 236 0 212 4 2 2 3 0 8 0 scsiplug 72 9 0 9 5 4 1 1 0 8 1 scxspl 216 70848 0 70847 17 15 2 8 1 8 1 plimitpl 152 722 0 704 1 0 1 1 0 8 0 sigapl 424 2767 0 2717 9 3 6 8 0 8 0 knotepl 120 560 0 0 17 0 17 17 0 8 0 kqueuepl 224 1240 0 1227 20 15 5 5 0 8 4 pipepl 344 479 0 449 12 6 6 9 0 8 3 fdescpl 528 2728 0 2697 3 0 3 3 0 8 0 filepl 160 20526 0 20300 28 12 16 18 0 8 4 lockfpl 104 1076 0 1074 3 2 1 2 0 8 0 lockfspl 48 463 0 461 1 0 1 1 0 8 0 sessionpl 144 31 0 22 1 0 1 1 0 8 0 pgrppl 48 69 0 52 1 0 1 1 0 8 0 ucredpl 104 2944 0 2930 1 0 1 1 0 8 0 zombiepl 144 3940 0 3937 1 0 1 1 0 8 0 processpl 1232 2767 0 2717 6 0 6 6 0 8 0 procpl 664 6939 0 6877 8 1 7 8 0 8 0 sosppl 168 14 0 14 6 5 1 1 0 8 1 sockpl 752 5286 0 5253 52 46 6 17 0 8 2 mcl64k 65536 7 0 0 1 0 1 1 0 8 0 mcl16k 16384 2 0 0 1 0 1 1 0 8 0 mcl12k 12288 1 0 0 1 0 1 1 0 8 0 mcl9k 9216 3 0 0 1 0 1 1 0 8 0 mcl8k 8192 3 0 0 1 0 1 1 0 8 0 mcl4k 4096 126 0 0 16 0 16 16 0 8 0 mcl2k2 2112 2 0 0 1 0 1 1 0 8 0 mcl2k 2048 88 0 0 10 1 9 10 0 8 1 mtagpl 96 6 0 0 1 0 1 1 0 8 0 mbufpl 256 1579 0 0 97 0 97 97 0 8 0 bufpl 280 28784 0 22647 439 0 439 439 0 8 0 anonpl 32 15614 0 0 127 1 126 126 0 246 0 amapchunkpl 152 82725 0 82048 53 23 30 32 0 158 0 amappl16 200 9451 0 9341 78 69 9 38 0 8 0 amappl15 192 6 0 6 1 1 0 1 0 8 0 amappl14 184 3 0 2 1 0 1 1 0 8 0 amappl13 176 520 0 518 1 0 1 1 0 8 0 amappl12 168 3132 0 3091 3 0 3 3 0 8 0 amappl11 160 3 0 3 1 1 0 1 0 8 0 amappl10 152 48 0 34 1 0 1 1 0 8 0 amappl9 144 258 0 257 2 1 1 1 0 8 0 amappl8 136 26 0 23 1 0 1 1 0 8 0 amappl7 128 113 0 111 1 0 1 1 0 8 0 amappl6 120 356 0 342 1 0 1 1 0 8 0 amappl5 112 76 0 65 1 0 1 1 0 8 0 amappl4 104 492 0 463 1 0 1 1 0 8 0 amappl3 96 15014 0 14920 4 1 3 3 0 8 0 amappl2 88 2834 0 2758 2 0 2 2 0 8 0 amappl1 80 19270 0 18676 15 0 15 15 0 8 0 amappl 88 22985 0 22813 5 0 5 5 0 92 0 uvmvnodes 80 5926 0 0 121 0 121 121 0 8 0 dma65536 65536 1 0 1 1 1 0 1 0 8 0 dma32768 32768 1 0 1 1 1 0 1 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 10 0 10 3 3 0 1 0 8 0 dma128 128 257 0 257 4 4 0 1 0 8 0 dma64 64 8 0 8 2 2 0 1 0 8 0 dma32 32 7 0 7 1 1 0 1 0 8 0 dma16 16 23 0 22 1 0 1 1 0 8 0 aobjpl 72 77 0 7 2 0 2 2 0 8 0 uaddrrnd 24 2728 0 2697 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 2728 0 2697 1 0 1 1 0 8 0 vmmpekpl 168 22229 0 22165 4 0 4 4 0 8 0 vmmpepl 168 176549 0 174555 135 35 100 116 0 357 0 vmsppl 488 2727 0 2696 6 1 5 5 0 8 0 rwobjpl 80 53218 0 46190 150 4 146 150 0 8 0 pdppl 4096 5463 0 5392 117 46 71 87 0 8 0 pvpl 32 23309 0 0 187 0 187 187 0 265 0 pmappl 256 2727 0 2696 3 0 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 421 0 89 10 0 10 10 0 8 0 ddb{1}> machine ddbcpu 0 Stopped at x86_ipi_db+0x27: addq $0x8,%rsp x86_ipi_db(ffffffff83873ff0) 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(ffffffff8388d4e0) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:134 [inline] __mp_lock(ffffffff8388d4e0) 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(ffffffff8388d4e0) at __mp_lock+0x199 __mp_lock_spin sys/kern/kern_lock.c:134 [inline] __mp_lock(ffffffff8388d4e0) at __mp_lock+0x199 sys/kern/kern_lock.c:165 intr_handler(ffff80003c43b240,ffff80000007aa80) at intr_handler+0xe9 sys/arch/amd64/amd64/intr.c:559 Xintr_ioapic_edge23_untramp() at Xintr_ioapic_edge23_untramp+0x18f end of kernel end trace frame: 0x75e624c30aa0, count: 5 ddb{0}> trace x86_ipi_db(ffffffff83873ff0) 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(ffffffff8388d4e0) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:134 [inline] __mp_lock(ffffffff8388d4e0) 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(ffffffff8388d4e0) at __mp_lock+0x199 __mp_lock_spin sys/kern/kern_lock.c:134 [inline] __mp_lock(ffffffff8388d4e0) at __mp_lock+0x199 sys/kern/kern_lock.c:165 intr_handler(ffff80003c43b240,ffff80000007aa80) at intr_handler+0xe9 sys/arch/amd64/amd64/intr.c:559 Xintr_ioapic_edge23_untramp() at Xintr_ioapic_edge23_untramp+0x18f end of kernel end trace frame: 0x75e624c30aa0, count: -10 ddb{0}> machine ddbcpu 1 Stopped at proc_trampoline+0xc7: movl $0,%gs:0x688 proc_trampoline() at proc_trampoline+0xc7 end of kernel end trace frame: 0x77196a8aea50, count: 14 ddb{1}> trace proc_trampoline() at proc_trampoline+0xc7 end of kernel end trace frame: 0x77196a8aea50, count: -1