uvm_fault(0xfffffd806bebe1f8, 0x0, 0, 1) -> e fatal page fault in supervisor mode trap type 6 code 0 rip ffffffff818e5b20 cs 8 rflags 10246 cr2 0 cpl 0 rsp ffff8000333eabb0 gsbase 0xffff8000299ddff0 kgsbase 0x0 panic: trap type 6, code=0, pc=ffffffff818e5b20 Starting stack trace... panic(ffffffff83333275) at panic+0x1d0 sys/kern/subr_prf.c:229 kerntrap(ffff8000333eab00) at kerntrap+0x29b sys/arch/amd64/amd64/trap.c:327 alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b dt_ioctl_record_stop(ffff800001480000) at dt_ioctl_record_stop+0xf0 sys/dev/dt/dt_dev.c:579 dtclose(11e5f,81,2000,ffff8000363fea60) at dtclose+0x105 dt_pcb_purge sys/dev/dt/dt_dev.c:-1 [inline] dtclose(11e5f,81,2000,ffff8000363fea60) at dtclose+0x105 sys/dev/dt/dt_dev.c:232 spec_close(ffff8000333eacb0) at spec_close+0x45f sys/kern/spec_vnops.c:-1 VOP_CLOSE(fffffd805ee1f030,81,fffffd807f7d35b0,ffff8000363fea60) at VOP_CLOSE+0x133 sys/kern/vfs_vops.c:156 vn_closefile(fffffd8064e73b40,ffff8000363fea60) at vn_closefile+0x12b vn_close sys/kern/vfs_vnops.c:292 [inline] vn_closefile(fffffd8064e73b40,ffff8000363fea60) at vn_closefile+0x12b sys/kern/vfs_vnops.c:615 fdrop(fffffd8064e73b40,ffff8000363fea60) at fdrop+0x126 sys/kern/kern_descrip.c:1265 closef(fffffd8064e73b40,ffff8000363fea60) at closef+0x192 sys/kern/kern_descrip.c:1249 fdfree(ffff8000363fea60) at fdfree+0x116 sys/kern/kern_descrip.c:1181 exit1(ffff8000363fea60,0,0,1) at exit1+0x58f sys/kern/kern_exit.c:214 sys_exit(ffff8000363fea60,ffff8000333eb020,ffff8000333eaf70) at sys_exit+0x1a sys/kern/kern_exit.c:-1 syscall(ffff8000333eb020) at syscall+0xb08 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff8000333eb020) at syscall+0xb08 sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7b76b47ea610, count: 242 End of stack trace. WARNING: SPL NOT LOWERED ON TRAP EXIT 4 0 Stopped at proc_trampoline+0xc7: movl $0,%gs:0x680 TID PID UID PRFLAGS PFLAGS CPU COMMAND 429302 69690 0 0 0 0 syz-executor * 45691 25573 0 0x2 0 1 syz-executor proc_trampoline() at proc_trampoline+0xc7 end of kernel end trace frame: 0x7c175cd85c40, 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(0xfffffd806bebe1f8, 0x0, 0, 1) -> e ddb{1}> trace proc_trampoline() at proc_trampoline+0xc7 end of kernel end trace frame: 0x7c175cd85c40, count: -1 ddb{1}> show registers rdi 0 rsi 0 rbp 0xffff80002a374240 rbx 0 rdx 0 rcx 0xffff80002a2b59b8 rax 0x2a r8 0xffff80002a374170 r9 0x1 r10 0x9a08d6d323fe2226 r11 0x4aa4ec969002c688 r12 0 r13 0 r14 0 r15 0 rip 0xffffffff81b3f4c7 proc_trampoline+0xc7 cs 0x8 rflags 0x246 rsp 0xffff80002a3741c0 ss 0x10 proc_trampoline+0xc7: movl $0,%gs:0x680 ddb{1}> show proc PROC (syz-executor) tid=45691 pid=25573 tcnt=1 stat=onproc flags process=2 proc=0 runpri=50, usrpri=50, slppri=17, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff80002a2b5208,0xffff8000ffffcf78 process=0xffff8000ffff4e00 user=0xffff80002a36f000, vmspace=0xfffffd806ec995a8 estcpu=36, cpticks=1, pctcpu=0.58, user=1, sys=126, intr=1 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 69690 429302 25573 0 7 0 syz-executor 72770 147692 18184 0 2 0 syz-executor 77656 307820 24178 0 2 0 syz-executor 49336 327959 88316 0 2 0 syz-executor 49336 78054 88316 0 2 0x4000000 syz-executor 49336 224 88316 0 2 0x4000000 syz-executor 81883 387896 21589 0 3 0x3000 suspend syz-executor 81883 261662 21589 0 3 0x4081000 inode syz-executor 81883 271325 21589 0 3 0x4081000 biowait syz-executor 81883 117093 21589 0 3 0x4081000 inode syz-executor 81883 338886 21589 0 3 0x4081000 inode syz-executor 48076 399014 0 0 3 0x14200 acct acct 84982 258361 0 0 3 0x14200 bored sosplice 81779 391625 54821 0 3 0x2 biowait syz-executor 21589 28617 54821 0 3 0x82 wait syz-executor 18184 7122 54821 0 3 0x82 nanoslp syz-executor *25573 45691 54821 0 7 0x2 syz-executor 24010 132933 54821 0 3 0x82 wait syz-executor 16454 2268 54821 0 3 0x82 nanoslp syz-executor 88316 461133 54821 0 3 0x82 nanoslp syz-executor 24178 230615 54821 0 3 0x82 nanoslp syz-executor 54821 248989 16587 0 3 0x82 kqread syz-executor 16587 113860 25481 0 3 0x10008a sigsusp ksh 25481 108905 82284 0 3 0x98 kqread sshd-session 82284 187789 23890 0 3 0x92 kqread sshd-session 67235 23965 1 0 3 0x100083 ttyin getty 23890 5547 1 0 3 0x88 kqread sshd 10884 364711 23012 74 3 0x1100092 bpf pflogd 23012 320896 1 0 3 0x80 sbwait pflogd 75228 297889 80645 73 3 0x1100090 kqread syslogd 80645 74679 1 0 3 0x100082 sbwait syslogd 61124 44960 1 0 3 0x100080 kqread resolvd 64531 382375 17579 77 3 0x100092 kqread dhcpleased 89221 146275 17579 77 3 0x100092 kqread dhcpleased 17579 331028 1 0 3 0x80 kqread dhcpleased 29537 221579 0 0 3 0x14200 bored smr 29561 135587 0 0 2 0x14200 zerothread 91375 389389 0 0 3 0x14200 aiodoned aiodoned 7757 405270 0 0 3 0x14200 syncer update 58266 22167 0 0 3 0x14200 cleaner cleaner 39239 183384 0 0 3 0x14200 reaper reaper 35372 149119 0 0 3 0x14200 pgdaemon pagedaemon 7837 201550 0 0 3 0x14200 bored viomb 66068 116106 0 0 3 0x40014200 acpi0 acpi0 53530 260360 0 0 3 0x40014200 idle1 84372 258607 0 0 3 0x14200 bored softnet3 18130 436424 0 0 3 0x14200 bored softnet2 50169 204475 0 0 3 0x14200 bored softnet1 7683 450780 0 0 3 0x14200 netlock softnet0 36420 473400 0 0 2 0x40014200 systqmp 61138 126251 0 0 3 0x14200 bored systq 23437 43417 0 0 3 0x14200 tmoslp softclockmp 6261 505514 0 0 3 0x40014200 tmoslp softclock 29602 47063 0 0 3 0x40014200 idle0 1 391102 0 0 3 0x82 wait init 0 0 -1 0 3 0x10010200 scheduler swapper ddb{1}> show all locks Process 81883 (syz-executor) thread 0xffff80003c41a7d8 (271325) exclusive rrwlock inode r = 0 (0xfffffd806de030b0) #0 witness_lock+0x5bb stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5bb sys/kern/subr_witness.c:1160 #1 rw_do_enter_write+0x3ea sys/kern/kern_rwlock.c:316 #2 rrw_enter+0xc6 sys/kern/kern_rwlock.c:616 #3 VOP_LOCK+0xa6 sys/kern/vfs_vops.c:524 #4 vn_lock+0xa4 sys/kern/vfs_vnops.c:570 #5 vn_write+0x190 sys/kern/vfs_vnops.c:405 #6 dofilewritev+0x23c sys/kern/sys_generic.c:380 #7 sys_write+0xa2 sys/kern/sys_generic.c:300 #8 syscall+0xbc6 mi_syscall sys/sys/syscall_mi.h:176 [inline] #8 syscall+0xbc6 sys/arch/amd64/amd64/trap.c:577 #9 Xsyscall+0x128 Process 81883 (syz-executor) thread 0xffff80003c41a2b8 (338886) exclusive rrwlock inode r = 0 (0xfffffd806de03890) #0 witness_lock+0x5bb stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5bb sys/kern/subr_witness.c:1160 #1 rw_do_enter_write+0x3ea sys/kern/kern_rwlock.c:316 #2 rrw_enter+0xc6 sys/kern/kern_rwlock.c:616 #3 VOP_LOCK+0xa6 sys/kern/vfs_vops.c:524 #4 vn_lock+0xa4 sys/kern/vfs_vnops.c:570 #5 vfs_lookup+0x109 sys/kern/vfs_lookup.c:418 #6 namei+0x7aa sys/kern/vfs_lookup.c:250 #7 sys_truncate+0x84 sys/kern/vfs_syscalls.c:2888 #8 syscall+0xb08 mi_syscall sys/sys/syscall_mi.h:176 [inline] #8 syscall+0xb08 sys/arch/amd64/amd64/trap.c:577 #9 Xsyscall+0x128 Process 81779 (syz-executor) thread 0xffff8000ffffd1f8 (391625) exclusive rrwlock inode r = 0 (0xfffffd806dd0e308) #0 witness_lock+0x5bb stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5bb sys/kern/subr_witness.c:1160 #1 rw_do_enter_write+0x3ea sys/kern/kern_rwlock.c:316 #2 rrw_enter+0xc6 sys/kern/kern_rwlock.c:616 #3 VOP_LOCK+0xa6 sys/kern/vfs_vops.c:524 #4 vn_lock+0xa4 sys/kern/vfs_vnops.c:570 #5 vget+0x2bd sys/kern/vfs_subr.c:694 #6 ufs_ihashget+0x185 sys/ufs/ufs/ufs_ihash.c:98 #7 ffs_vget+0x8c sys/ufs/ffs/ffs_vfsops.c:1201 #8 ufs_lookup+0x19f8 sys/ufs/ufs/ufs_lookup.c:478 #9 VOP_LOOKUP+0x6e sys/kern/vfs_vops.c:85 #10 vfs_lookup+0x8fa sys/kern/vfs_lookup.c:566 #11 namei+0x7aa sys/kern/vfs_lookup.c:250 #12 dounlinkat+0xc1 sys/kern/vfs_syscalls.c:1866 #13 syscall+0xb08 mi_syscall sys/sys/syscall_mi.h:176 [inline] #13 syscall+0xb08 sys/arch/amd64/amd64/trap.c:577 #14 Xsyscall+0x128 exclusive rrwlock inode r = 0 (0xfffffd806c5c4c20) #0 witness_lock+0x5bb stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5bb sys/kern/subr_witness.c:1160 #1 rw_do_enter_write+0x3ea sys/kern/kern_rwlock.c:316 #2 rrw_enter+0xc6 sys/kern/kern_rwlock.c:616 #3 VOP_LOCK+0xa6 sys/kern/vfs_vops.c:524 #4 vn_lock+0xa4 sys/kern/vfs_vnops.c:570 #5 vfs_lookup+0x109 sys/kern/vfs_lookup.c:418 #6 namei+0x7aa sys/kern/vfs_lookup.c:250 #7 dounlinkat+0xc1 sys/kern/vfs_syscalls.c:1866 #8 syscall+0xb08 mi_syscall sys/sys/syscall_mi.h:176 [inline] #8 syscall+0xb08 sys/arch/amd64/amd64/trap.c:577 #9 Xsyscall+0x128 ddb{1}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10217 11119K 11549K 166960K 12048 0 pcb 17 14K 15K 166960K 95 0 rtable 195 6K 7K 166960K 409 0 pf 34 17K 18K 166960K 68 0 ifaddr 38 6K 7K 166960K 59 0 ifgroup 55 2K 2K 166960K 85 0 sysctl 3 1K 1K 166960K 3 0 counters 64 36K 37K 166960K 92 0 ioctlops 0 0K 8K 166960K 1604 0 iov 0 0K 18K 166960K 37 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1430 90K 90K 166960K 2034 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 1K 166960K 22 0 dirhash 12 2K 2K 166960K 24 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 17 61K 89K 166960K 554 0 sigio 0 0K 0K 166960K 141 0 proc 72 91K 115K 166960K 566 0 subproc 72 4K 4K 166960K 74 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 40 0 in_multi 75 5K 7K 166960K 128 0 ether_multi 1 0K 0K 166960K 4 0 mrt 0 0K 0K 166960K 1 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 91 413K 413K 166960K 91 0 exec 0 0K 1K 166960K 533 0 fusefs mount 1 32K 32K 166960K 1 0 pfkey data 0 0K 0K 166960K 2 0 tdb 3 0K 0K 166960K 3 0 VM swap 8 62K 64K 166960K 10 0 UVM amap 218 159K 173K 166960K 6712 0 UVM aobj 4 2K 2K 166960K 4 0 pinsyscall 42 84K 100K 166960K 1635 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 19 0 NDP 12 0K 2K 166960K 39 0 temp 54 8686K 8807K 166960K 13677 0 kqueue 13 20K 26K 166960K 85 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 120 130 0 125 3 2 1 3 0 8 0 rtentry 176 128 0 41 7 1 6 6 0 8 0 unpcb 144 339 0 319 5 2 3 4 0 8 2 syncache 336 3 0 3 1 1 0 1 0 8 0 tcpcb 808 165 0 161 8 1 7 7 0 8 6 arp 128 19 0 3 1 0 1 1 0 8 0 inpcb 384 576 0 567 14 6 8 8 0 8 6 nd6 144 31 0 8 1 0 1 1 0 8 0 pkpcb 40 6 0 6 1 1 0 1 0 8 0 kcovpl 48 8 0 0 1 0 1 1 0 8 0 ppxss 1192 9 0 9 3 2 1 1 0 8 1 pppxif 1504 2 0 2 1 1 0 1 0 8 0 pffrag 232 6 0 0 1 0 1 1 0 482 0 pffrnode 88 6 0 0 1 0 1 1 0 8 0 pffrent 40 10 0 4 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 pfstitem 24 45 0 17 1 0 1 1 0 8 0 pfstkey 128 45 0 17 2 0 2 2 0 8 0 pfstate 384 45 0 17 5 0 5 5 0 8 0 pfrule 1344 21 0 16 2 1 1 2 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 533 0 183 30 3 27 29 0 8 3 art_table 32 534 0 183 4 0 4 4 0 8 0 art_node 16 127 0 49 1 0 1 1 0 8 0 sysvmsgpl 40 4 0 1 1 0 1 1 0 8 0 semapl 112 19 0 9 1 0 1 1 0 8 0 shmpl 112 1 0 0 1 0 1 1 0 8 0 dirhash 1024 25 0 8 3 0 3 3 0 8 0 dino2pl 256 2443 0 940 95 0 95 95 0 8 0 ffsino 288 2443 0 940 109 0 109 109 0 8 0 nchpl 144 3245 0 1556 63 0 63 63 0 8 0 rtmask 32 2 0 2 1 0 1 1 0 8 1 uvmvnodes 80 2942 0 0 61 0 61 61 0 8 0 vnodes 216 2942 0 0 164 0 164 164 0 8 0 namei 1024 11123 0 11122 4 3 1 2 0 8 0 percpumem 16 61 0 14 1 0 1 1 0 8 0 kstatmem 264 42 0 18 3 1 2 3 0 8 0 scsiplug 72 2 0 2 2 2 0 1 0 8 0 scxspl 216 11156 0 11154 11 8 3 8 1 8 2 plimitpl 152 84 0 64 1 0 1 1 0 8 0 sigapl 424 856 0 805 7 1 6 7 0 8 0 futexpl 64 6991 0 6991 1 0 1 1 0 8 1 knotepl 120 312 0 0 10 0 10 10 0 8 0 kqueuepl 224 283 0 274 6 1 5 5 0 8 4 pipepl 336 201 0 174 8 0 8 8 0 8 5 fdescpl 520 835 0 804 3 0 3 3 0 8 0 filepl 160 5663 0 5437 23 8 15 15 0 8 4 lockfpl 104 134 0 131 1 0 1 1 0 8 0 lockfspl 48 58 0 55 1 0 1 1 0 8 0 sessionpl 144 22 0 13 1 0 1 1 0 8 0 pgrppl 48 38 0 21 1 0 1 1 0 8 0 ucredpl 104 950 0 937 1 0 1 1 0 8 0 zombiepl 144 807 0 805 3 2 1 1 0 8 0 processpl 1192 856 0 805 5 0 5 5 0 8 0 procpl 656 1626 0 1569 6 0 6 6 0 8 0 srpgc 96 2 0 2 1 1 0 1 0 8 0 sosppl 168 1 0 1 1 0 1 1 0 8 1 sockpl 728 1060 0 1026 14 5 9 10 0 8 5 mcl64k 65536 3 0 0 1 0 1 1 0 8 0 mcl12k 12288 1 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 113 0 0 15 0 15 15 0 8 0 mcl2k 2048 20 0 0 3 0 3 3 0 8 0 mtagpl 96 80 0 0 2 0 2 2 0 8 0 mbufpl 256 249 0 0 16 0 16 16 0 8 0 bufpl 280 3802 0 124 263 0 263 263 0 8 0 anonpl 32 9543 0 0 77 0 77 77 0 246 0 amapchunkpl 152 21785 0 21359 40 15 25 30 0 158 4 amappl16 200 3247 0 3028 41 20 21 21 0 8 9 amappl15 192 12 0 12 2 2 0 1 0 8 0 amappl14 184 110 0 98 1 0 1 1 0 8 0 amappl13 176 5 0 5 1 1 0 1 0 8 0 amappl12 168 1469 0 1439 4 2 2 3 0 8 0 amappl11 160 51 0 37 1 0 1 1 0 8 0 amappl10 152 8 0 8 2 2 0 1 0 8 0 amappl9 144 322 0 322 1 1 0 1 0 8 0 amappl8 136 24 0 21 1 0 1 1 0 8 0 amappl7 128 140 0 128 1 0 1 1 0 8 0 amappl6 120 246 0 243 1 0 1 1 0 8 0 amappl5 112 125 0 114 1 0 1 1 0 8 0 amappl4 104 311 0 290 1 0 1 1 0 8 0 amappl3 96 4059 0 3964 4 0 4 4 0 8 0 amappl2 88 624 0 562 2 0 2 2 0 8 0 amappl1 80 9803 0 9201 14 1 13 14 0 8 0 amappl 88 5933 0 5789 6 1 5 5 0 92 0 dma65536 65536 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 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 19 0 18 1 0 1 1 0 8 0 aobjpl 72 3 0 0 1 0 1 1 0 8 0 uaddrrnd 24 835 0 804 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 835 0 804 1 0 1 1 0 8 0 vmmpekpl 168 8637 0 8598 3 0 3 3 0 8 0 vmmpepl 168 58491 0 56352 118 14 104 104 0 357 5 vmsppl 480 834 0 804 5 1 4 5 0 8 0 rwobjpl 72 20875 0 16835 80 3 77 77 0 8 3 pdppl 4096 1677 0 1608 95 24 71 83 0 8 2 pvpl 32 18370 0 0 148 0 148 148 0 265 0 pmappl 256 834 0 804 3 0 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 397 0 35 11 0 11 11 0 8 0 ddb{1}> machine ddbcpu 0 Stopped at x86_ipi_db+0x27: addq $0x8,%rsp x86_ipi_db(ffffffff83869ff0) 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(ffffffff8392b5e0) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:113 [inline] __mp_lock(ffffffff8392b5e0) at __mp_lock+0x192 sys/kern/kern_lock.c:144 softintr_dispatch(2) at softintr_dispatch+0x5b sys/arch/amd64/amd64/softintr.c:88 Xsofttty() at Xsofttty+0x27 __mp_lock(ffffffff8392b5e0) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:113 [inline] __mp_lock(ffffffff8392b5e0) at __mp_lock+0x192 sys/kern/kern_lock.c:144 intr_handler(ffff80002e7d9a70,ffff800000079f00) at intr_handler+0xe1 sys/arch/amd64/amd64/intr.c:553 Xintr_ioapic_edge23_untramp() at Xintr_ioapic_edge23_untramp+0x18f __mp_lock(ffffffff8392b5e0) at __mp_lock+0x19e __mp_lock_spin sys/kern/kern_lock.c:113 [inline] __mp_lock(ffffffff8392b5e0) at __mp_lock+0x19e sys/kern/kern_lock.c:144 syscall(ffff80002e7d9c40) at syscall+0xae6 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80002e7d9c40) at syscall+0xae6 sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7c175cd85cf0, count: 3 ddb{0}> trace x86_ipi_db(ffffffff83869ff0) 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(ffffffff8392b5e0) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:113 [inline] __mp_lock(ffffffff8392b5e0) at __mp_lock+0x192 sys/kern/kern_lock.c:144 softintr_dispatch(2) at softintr_dispatch+0x5b sys/arch/amd64/amd64/softintr.c:88 Xsofttty() at Xsofttty+0x27 __mp_lock(ffffffff8392b5e0) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:113 [inline] __mp_lock(ffffffff8392b5e0) at __mp_lock+0x192 sys/kern/kern_lock.c:144 intr_handler(ffff80002e7d9a70,ffff800000079f00) at intr_handler+0xe1 sys/arch/amd64/amd64/intr.c:553 Xintr_ioapic_edge23_untramp() at Xintr_ioapic_edge23_untramp+0x18f __mp_lock(ffffffff8392b5e0) at __mp_lock+0x19e __mp_lock_spin sys/kern/kern_lock.c:113 [inline] __mp_lock(ffffffff8392b5e0) at __mp_lock+0x19e sys/kern/kern_lock.c:144 syscall(ffff80002e7d9c40) at syscall+0xae6 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80002e7d9c40) at syscall+0xae6 sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7c175cd85cf0, count: -12 ddb{0}> machine ddbcpu 1 Stopped at proc_trampoline+0xc7: movl $0,%gs:0x680 proc_trampoline() at proc_trampoline+0xc7 end of kernel end trace frame: 0x7c175cd85c40, count: 14 ddb{1}> trace proc_trampoline() at proc_trampoline+0xc7 end of kernel end trace frame: 0x7c175cd85c40, count: -1