uvm_fault(0xfffffd80678289b0, 0x0, 0, 1) -> e fatal page fault in supervisor mode trap type 6 code 0 rip ffffffff81afcf38 cs 8 rflags 10207 cr2 0 cpl 0 rsp ffff80003c474f40 gsbase 0xffff8000299edff0 kgsbase 0x0 panic: trap type 6, code=0, pc=ffffffff81afcf38 Starting stack trace... panic(ffffffff833a205a) at panic+0x1d0 sys/kern/subr_prf.c:229 kerntrap(ffff80003c474e90) at kerntrap+0x30b alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b dt_ioctl_record_stop(ffff80000147b000) at dt_ioctl_record_stop+0x108 sys/dev/dt/dt_dev.c:586 dtclose(11e5f,1,2000,ffff800039020800) at dtclose+0x109 dt_pcb_purge sys/dev/dt/dt_dev.c:-1 [inline] dtclose(11e5f,1,2000,ffff800039020800) at dtclose+0x109 sys/dev/dt/dt_dev.c:232 spec_close(ffff80003c475040) at spec_close+0x466 sys/kern/spec_vnops.c:-1 VOP_CLOSE(fffffd80732aedc8,1,fffffd80097fb680,ffff800039020800) at VOP_CLOSE+0x132 sys/kern/vfs_vops.c:156 vn_closefile(fffffd806bd230c0,ffff800039020800) at vn_closefile+0x12b vn_close sys/kern/vfs_vnops.c:292 [inline] vn_closefile(fffffd806bd230c0,ffff800039020800) at vn_closefile+0x12b sys/kern/vfs_vnops.c:615 fdrop(fffffd806bd230c0,ffff800039020800) at fdrop+0x121 sys/kern/kern_descrip.c:1280 closef(fffffd806bd230c0,ffff800039020800) at closef+0x192 sys/kern/kern_descrip.c:1264 fdfree(ffff800039020800) at fdfree+0x116 sys/kern/kern_descrip.c:1195 exit1(ffff800039020800,0,0,1) at exit1+0x576 sys/kern/kern_exit.c:215 sys_exit(ffff800039020800,ffff80003c4753b0,ffff80003c475300) at sys_exit+0x1a sys/kern/kern_exit.c:-1 syscall(ffff80003c4753b0) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003c4753b0) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:746 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7af7401a61c0, 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 * 68100 20710 0 0 0x4000000 1 syz-executor 15504 72072 0 0x14000 0x200 0 reaper proc_trampoline() at proc_trampoline+0xc7 end of kernel end trace frame: 0xbd18115e8c0, 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}> ddb{1}> set $lines = 0 ddb{1}> set $maxwidth = 0 ddb{1}> show panic *cpu1: uvm_fault(0xfffffd80678289b0, 0x0, 0, 1) -> e ddb{1}> trace proc_trampoline() at proc_trampoline+0xc7 end of kernel end trace frame: 0xbd18115e8c0, count: -1 ddb{1}> show registers rdi 0 rsi 0 rbp 0xffff80003c43f740 rbx 0 rdx 0 rcx 0xffff800039020d30 rax 0x2a r8 0xffff80003c43f670 r9 0x1 r10 0xd101e6fae6b6916f r11 0x961131083bc87127 r12 0 r13 0 r14 0 r15 0 rip 0xffffffff813db4c7 proc_trampoline+0xc7 cs 0x8 rflags 0x246 rsp 0xffff80003c43f6c0 ss 0 proc_trampoline+0xc7: movl $0,%gs:0x688 ddb{1}> show proc PROC (syz-executor) tid=68100 pid=20710 tcnt=4 stat=onproc flags process=0 proc=4000000 runpri=86, usrpri=86, slppri=32, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff800039020800,0xffff800039020578 process=0xffff800039026b70 user=0xffff80003c43a000, vmspace=0xfffffd8067828210 estcpu=36, cpticks=1, pctcpu=0.0, user=0, sys=1, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 20710 59207 81074 0 2 0 syz-executor 20710 363310 81074 0 3 0x4000080 lockf syz-executor *20710 68100 81074 0 7 0x4000000 syz-executor 20710 268052 81074 0 2 0x4000000 syz-executor 98883 18975 54197 0 2 0x2 syz-executor 60081 276884 0 0 3 0x14200 acct acct 47056 412199 54197 0 3 0x2 biowait syz-executor 60773 343776 0 0 3 0x14200 bored sosplice 4019 284710 54197 0 3 0x82 piperd syz-executor 59658 502284 54197 0 3 0x82 piperd syz-executor 17052 82961 54197 0 3 0x82 nanoslp syz-executor 76068 422125 54197 0 3 0x82 piperd syz-executor 81074 98596 54197 0 3 0x82 nanoslp syz-executor 54197 199225 81884 0 2 0x10000003 syz-executor 81884 114468 89540 0 3 0x10008a sigsusp ksh 89540 505612 30607 0 3 0x98 kqread sshd-session 30607 320018 35360 0 3 0x92 kqread sshd-session 71385 367696 1 0 3 0x100083 ttyin getty 35360 22553 1 0 3 0x88 kqread sshd 13375 373148 99873 74 3 0x1100092 bpf pflogd 99873 433905 1 0 3 0x80 sbwait pflogd 77853 322640 40343 73 3 0x1100090 kqread syslogd 40343 412451 1 0 3 0x100082 sbwait syslogd 75816 366963 1 0 3 0x100080 kqread resolvd 31456 195784 78414 77 3 0x100092 kqread dhcpleased 36531 205851 78414 77 3 0x100092 kqread dhcpleased 78414 397559 1 0 3 0x80 kqread dhcpleased 33716 207691 0 0 3 0x14200 bored smr 56465 409001 0 0 2 0x14200 zerothread 45822 398055 0 0 3 0x14200 aiodoned aiodoned 40169 513936 0 0 3 0x14200 syncer update 34938 205134 0 0 3 0x14200 cleaner cleaner 72072 15504 0 0 7 0x14200 reaper 18916 392612 0 0 3 0x14200 pgdaemon pagedaemon 53134 106709 0 0 3 0x14200 bored viomb 81866 134525 0 0 3 0x40014200 acpi0 acpi0 76507 290649 0 0 3 0x40014200 idle1 43799 95501 0 0 3 0x14200 bored softnet7 98910 353752 0 0 3 0x14200 bored softnet6 56013 9519 0 0 3 0x14200 bored softnet5 48425 187357 0 0 3 0x14200 bored softnet4 65903 475482 0 0 3 0x14200 bored softnet3 26927 360943 0 0 3 0x14200 bored softnet2 20849 254952 0 0 3 0x14200 bored softnet1 33270 434544 0 0 3 0x14200 netlock softnet0 14008 58268 0 0 2 0x40014200 systqmp 31449 13656 0 0 3 0x14200 bored systq 70511 488599 0 0 3 0x14200 tmoslp softclockmp 62572 319078 0 0 3 0x40014200 tmoslp softclock 99159 155259 0 0 3 0x40014200 idle0 1 512892 0 0 3 0x82 wait init 0 0 -1 0 3 0x10010200 scheduler swapper ddb{1}> show all locks CPU 0: exclusive mutex &vioq->viq_txmtx r = 0 (0xffff8000001a0d78) #0 witness_lock+0x5f1 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5f1 sys/kern/subr_witness.c:1160 #1 mtx_enter_try+0x1ad sys/kern/kern_lock.c:311 #2 mtx_enter+0x62 sys/kern/kern_lock.c:261 #3 vio_txeof+0x7a sys/dev/pv/if_vio.c:1690 #4 vio_tx_intr+0x57 sys/dev/pv/if_vio.c:1634 #5 vio_queue_intr+0x41 sys/dev/pv/if_vio.c:910 #6 intr_handler+0x125 sys/arch/amd64/amd64/intr.c:563 #7 Xintr_ioapic_edge26_untramp+0x18f #8 Xspllower+0x1d #9 pmap_tlb_shootrange+0x428 sys/arch/amd64/amd64/pmap.c:3303 #10 pmap_kremove+0x114 pmap_tlb_shootwait sys/arch/amd64/amd64/pmap.c:3422 [inline] #10 pmap_kremove+0x114 sys/arch/amd64/amd64/pmap.c:568 #11 km_free+0x359 sys/uvm/uvm_km.c:825 #12 uvm_uarea_free+0x4f sys/uvm/uvm_glue.c:304 #13 reaper+0x1aa sys/kern/kern_exit.c:493 #14 proc_trampoline+0x10 Process 20710 (syz-executor) thread 0xffff800039020568 (268052) exclusive rwlock fdlock r = 0 (0xffff8000390226a0) #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 doopenat+0x18e sys/kern/vfs_syscalls.c:1105 #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 47056 (syz-executor) thread 0xffff800039020fc8 (412199) exclusive rrwlock inode r = 0 (0xfffffd8068db6d98) #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 vget+0x2a2 sys/kern/vfs_subr.c:693 #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:746 #14 Xsyscall+0x128 exclusive rrwlock inode r = 0 (0xfffffd8068db6330) #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 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:746 #9 Xsyscall+0x128 ddb{1}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10234 11065K 11251K 166960K 12396 0 pcb 17 16K 18K 166960K 376 0 rtable 187 12K 13K 166960K 472 0 pf 39 18K 82K 166960K 249 0 ifaddr 35 6K 8K 166960K 123 0 ifgroup 59 2K 3K 166960K 207 0 sysctl 3 1K 9K 166960K 17 0 counters 70 37K 38K 166960K 278 0 ioctlops 0 0K 8K 166960K 1720 0 iov 0 0K 18K 166960K 80 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1364 86K 87K 166960K 2416 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 9K 166960K 25 0 VM map 2 1K 1K 166960K 2 0 sem 12 0K 0K 166960K 192 0 dirhash 12 2K 2K 166960K 39 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 11 37K 232K 166960K 1412 0 sigio 0 0K 0K 166960K 86 0 proc 72 115K 196K 166960K 744 0 subproc 63 3K 4K 166960K 180 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 212 0 in_multi 61 4K 7K 166960K 174 0 ether_multi 1 0K 0K 166960K 16 0 mrt 1 0K 0K 166960K 3 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 693 0 fusefs mount 1 32K 32K 166960K 1 0 pfkey data 0 0K 0K 166960K 3 0 tdb 3 0K 0K 166960K 3 0 VM swap 8 62K 64K 166960K 10 0 UVM amap 193 151K 175K 166960K 14476 0 UVM aobj 56 4K 4K 166960K 58 0 pinsyscall 37 74K 103K 166960K 2537 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 72 0 NDP 13 0K 2K 166960K 89 0 temp 78 8651K 8720K 166960K 79366 0 kqueue 13 20K 30K 166960K 293 0 SYN cache 2 8K 16K 166960K 3 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 120 118 0 115 1 0 1 1 0 8 0 rtentry 176 149 0 84 5 0 5 5 0 8 1 unpcb 144 1112 0 1095 8 7 1 6 0 8 0 syncache 336 9 0 9 5 5 0 1 0 8 0 tcpqe 32 3 0 3 3 3 0 1 0 8 0 tcpcb 736 538 0 532 15 13 2 7 0 8 1 arp 128 17 0 11 1 0 1 1 0 8 0 inpcb 328 1645 0 1636 14 12 2 7 0 8 0 nd6 144 28 0 16 1 0 1 1 0 8 0 pkpcb 40 18 0 18 4 3 1 1 0 8 1 kcovpl 48 20 0 13 1 0 1 1 0 8 0 ppxss 1192 90 0 90 4 3 1 1 0 8 1 pppxif 1504 7 0 7 3 2 1 1 0 8 1 pfstscr 40 2 0 2 1 1 0 1 0 8 0 pffrag 232 10 0 3 1 0 1 1 0 482 0 pffrnode 88 10 0 3 1 0 1 1 0 8 0 pffrent 40 14 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 pfanchor 1288 3 0 1 1 0 1 1 0 8 0 pftag 88 2 0 1 1 0 1 1 0 8 0 pfstitem 24 93 0 55 1 0 1 1 0 8 0 pfstkey 128 101 0 64 2 0 2 2 0 8 0 pfstate 384 97 0 59 6 0 6 6 0 8 0 pfrule 1344 33 0 27 2 1 1 2 0 8 0 art_heap8 4096 3 0 0 3 0 3 3 0 8 0 art_heap4 256 606 0 298 28 4 24 28 0 8 2 art_table 40 609 0 298 5 0 5 5 0 8 0 art_node 32 145 0 89 1 0 1 1 0 8 0 sysvmsgpl 40 25 0 13 3 2 1 1 0 8 0 semupl 112 2 0 2 1 1 0 1 0 8 0 semapl 112 189 0 179 1 0 1 1 0 8 0 shmpl 112 55 0 2 2 0 2 2 0 8 0 dirhash 1024 35 0 18 3 0 3 3 0 8 0 dino2pl 256 4038 0 2523 95 0 95 95 0 8 0 ffsino 296 4038 0 2523 117 0 117 117 0 8 0 nchpl 144 6037 0 4334 64 0 64 64 0 8 0 rtmask 32 13 0 13 5 5 0 1 0 8 0 uvmvnodes 80 4620 0 0 95 0 95 95 0 8 0 vnodes 216 4620 0 0 257 0 257 257 0 8 0 namei 1024 21206 0 21206 6 5 1 4 0 8 1 percpumem 16 154 0 104 1 0 1 1 0 8 0 kstatmem 264 144 0 112 5 2 3 3 0 8 0 acpiwqpl 32 1 0 1 1 0 1 1 1 8 1 scsiplug 72 7 0 7 2 2 0 1 0 8 0 scxspl 216 30482 0 30481 9 8 1 4 1 8 0 plimitpl 152 418 0 401 1 0 1 1 0 8 0 sigapl 424 1677 0 1627 7 0 7 7 0 8 0 knotepl 120 795 0 0 23 0 23 23 0 8 0 kqueuepl 224 576 0 567 7 4 3 3 0 8 2 pipepl 344 250 0 223 4 0 4 4 0 8 0 fdescpl 528 1647 0 1621 3 0 3 3 0 8 0 filepl 160 10968 0 10768 28 14 14 16 0 8 3 lockfpl 104 684 0 680 3 2 1 2 0 8 0 lockfspl 48 221 0 218 1 0 1 1 0 8 0 sessionpl 144 38 0 29 1 0 1 1 0 8 0 pgrppl 48 134 0 117 1 0 1 1 0 8 0 ucredpl 104 1739 0 1725 1 0 1 1 0 8 0 zombiepl 144 2316 0 2314 2 1 1 1 0 8 0 processpl 1232 1678 0 1627 5 0 5 5 0 8 0 procpl 664 3914 0 3860 8 1 7 7 0 8 0 sosppl 168 14 0 14 5 4 1 1 0 8 1 sockpl 752 2926 0 2897 28 23 5 17 0 8 1 mcl64k 65536 23 0 0 3 0 3 3 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 mcl8k 8192 5 0 0 1 0 1 1 0 8 0 mcl4k 4096 121 0 0 16 1 15 16 0 8 0 mcl2k 2048 29 0 0 4 0 4 4 0 8 0 mtagpl 96 4 0 0 1 0 1 1 0 8 0 mbufpl 256 268 0 0 15 0 15 15 0 8 0 bufpl 280 11660 0 5517 440 0 440 440 0 8 0 anonpl 32 10067 0 0 82 0 82 82 0 246 0 amapchunkpl 152 49170 0 48825 61 35 26 36 0 158 10 amappl16 200 5192 0 5163 38 25 13 22 0 8 8 amappl15 192 7 0 6 1 0 1 1 0 8 0 amappl14 184 123 0 111 1 0 1 1 0 8 0 amappl13 176 18 0 18 1 1 0 1 0 8 0 amappl12 168 2334 0 2308 3 1 2 2 0 8 0 amappl11 160 81 0 67 1 0 1 1 0 8 0 amappl10 152 3 0 3 1 1 0 1 0 8 0 amappl9 144 260 0 258 1 0 1 1 0 8 0 amappl8 136 21 0 19 1 0 1 1 0 8 0 amappl7 128 114 0 101 1 0 1 1 0 8 0 amappl6 120 219 0 215 1 0 1 1 0 8 0 amappl5 112 136 0 126 1 0 1 1 0 8 0 amappl4 104 319 0 297 1 0 1 1 0 8 0 amappl3 96 9775 0 9693 5 1 4 4 0 8 0 amappl2 88 701 0 638 2 0 2 2 0 8 0 amappl1 80 14386 0 13807 15 0 15 15 0 8 0 amappl 88 13529 0 13407 5 0 5 5 0 92 0 dma4096 4096 1 0 1 1 1 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 8 0 8 3 2 1 1 0 8 1 dma128 128 256 0 256 3 3 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 57 0 2 1 0 1 1 0 8 0 uaddrrnd 24 1646 0 1621 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 1646 0 1621 1 0 1 1 0 8 0 vmmpekpl 168 14825 0 14771 3 0 3 3 0 8 0 vmmpepl 168 109596 0 107916 123 15 108 108 0 357 14 vmsppl 488 1645 0 1621 6 1 5 5 0 8 0 rwobjpl 80 34895 0 29339 119 1 118 118 0 8 0 pdppl 4096 3300 0 3242 119 51 68 86 0 8 10 pvpl 32 18875 0 0 152 0 152 152 0 265 0 pmappl 256 1645 0 1621 3 0 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 323 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(ffffffff83781ff0) 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(ffffffff839777d8) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:134 [inline] __mp_lock(ffffffff839777d8) at __mp_lock+0x192 sys/kern/kern_lock.c:165 intr_handler(ffff80002a268020,ffff800000069c00) at intr_handler+0xe9 sys/arch/amd64/amd64/intr.c:559 Xintr_ioapic_edge16_untramp() at Xintr_ioapic_edge16_untramp+0x18f __mp_lock(ffffffff839777d8) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:134 [inline] __mp_lock(ffffffff839777d8) at __mp_lock+0x192 sys/kern/kern_lock.c:165 intr_handler(ffff80002a268180,ffff800000079a80) at intr_handler+0xe9 sys/arch/amd64/amd64/intr.c:559 Xintr_ioapic_edge23_untramp() at Xintr_ioapic_edge23_untramp+0x18f mtx_enter(ffffffff83834bc0) at mtx_enter+0x8a sys/kern/kern_lock.c:261 msleep_nsec(ffffffff83834bf8,ffffffff83834bc0,4,ffffffff8338560d,ffffffffffffffff) at msleep_nsec+0x2d3 sys/kern/kern_synch.c:209 reaper(ffff8000ffffc008) at reaper+0x13b sys/kern/kern_exit.c:477 end trace frame: 0x0, count: 3 ddb{0}> trace x86_ipi_db(ffffffff83781ff0) 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(ffffffff839777d8) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:134 [inline] __mp_lock(ffffffff839777d8) at __mp_lock+0x192 sys/kern/kern_lock.c:165 intr_handler(ffff80002a268020,ffff800000069c00) at intr_handler+0xe9 sys/arch/amd64/amd64/intr.c:559 Xintr_ioapic_edge16_untramp() at Xintr_ioapic_edge16_untramp+0x18f __mp_lock(ffffffff839777d8) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:134 [inline] __mp_lock(ffffffff839777d8) at __mp_lock+0x192 sys/kern/kern_lock.c:165 intr_handler(ffff80002a268180,ffff800000079a80) at intr_handler+0xe9 sys/arch/amd64/amd64/intr.c:559 Xintr_ioapic_edge23_untramp() at Xintr_ioapic_edge23_untramp+0x18f mtx_enter(ffffffff83834bc0) at mtx_enter+0x8a sys/kern/kern_lock.c:261 msleep_nsec(ffffffff83834bf8,ffffffff83834bc0,4,ffffffff8338560d,ffffffffffffffff) at msleep_nsec+0x2d3 sys/kern/kern_synch.c:209 reaper(ffff8000ffffc008) at reaper+0x13b sys/kern/kern_exit.c:477 end trace frame: 0x0, count: -12 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: 0xbd18115e8c0, count: 14 ddb{1}> trace proc_trampoline() at proc_trampoline+0xc7 end of kernel end trace frame: 0xbd18115e8c0, count: -1