kernel: protection fault trap, code=0 Stopped at sys_semop+0x45b: movzwl 0(%rax),%r15d ddb{0}> ddb{0}> set $lines = 0 ddb{0}> set $maxwidth = 0 ddb{0}> show panic the kernel did not panic ddb{0}> trace sys_semop(ffff8000394cf9d8,ffff80003c5022c0,ffff80003c502210) at sys_semop+0x45b sys/kern/sysv_sem.c:615 syscall(ffff80003c5022c0) at syscall+0xb08 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003c5022c0) at syscall+0xb08 sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x704aff2fd50, count: -3 ddb{0}> show registers rdi 0 rsi 0 rbp 0xffff80003c5021e0 rbx 0 rdx 0 rcx 0xffff8000394cf9d8 rax 0xdeaf4152deaf4152 r8 0x7f7fffffc000 r9 0 r10 0xba9c14df98839f2 r11 0x4425eb9308d9fcdb r12 0xffff80000149e504 r13 0 r14 0xffff80003c5022c0 r15 0 rip 0xffffffff82fe591b sys_semop+0x45b cs 0x8 rflags 0x10246 __ALIGN_SIZE+0xf246 rsp 0xffff80003c5020c0 ss 0x10 sys_semop+0x45b: movzwl 0(%rax),%r15d ddb{0}> show proc PROC (syz-executor) tid=486282 pid=81729 tcnt=4 stat=onproc flags process=0 proc=4000000 runpri=80, usrpri=80, slppri=32, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff8000394ce558,0xffff8000394cfc78 process=0xffff80003c526240 user=0xffff80003c4fd000, vmspace=0xfffffd806beab738 estcpu=30, cpticks=0, pctcpu=0.0, user=0, sys=0, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND 96399 316121 19050 0 7 0 syz-executor 96399 335100 19050 0 2 0x4000000 syz-executor 81729 272941 9542 0 2 0 syz-executor *81729 486282 9542 0 7 0x4000000 syz-executor 81729 81702 9542 0 2 0x4000000 syz-executor 81729 276484 9542 0 2 0x4000000 syz-executor 27483 190585 7665 0 3 0x80 nanoslp syz-executor 27483 518936 7665 0 3 0x4000080 kqsel syz-executor 27483 370787 7665 0 3 0x4000080 fsleep syz-executor 73560 1889 0 0 3 0x14280 nfsidl nfsio 68529 292202 0 0 3 0x14280 nfsidl nfsio 76410 265737 0 0 3 0x14280 nfsidl nfsio 64026 110689 0 0 3 0x14280 nfsidl nfsio 60613 243194 0 0 3 0x14280 nfsidl nfsio 24341 300261 0 0 3 0x14280 nfsidl nfsio 88786 499790 0 0 3 0x14280 nfsidl nfsio 39014 218398 0 0 3 0x14280 nfsidl nfsio 23272 380379 0 0 3 0x14280 nfsidl nfsio 3415 500552 0 0 3 0x14280 nfsidl nfsio 94488 449415 0 0 3 0x14280 nfsidl nfsio 87391 487961 0 0 3 0x14280 nfsidl nfsio 53343 230340 0 0 3 0x14280 nfsidl nfsio 9262 281671 0 0 3 0x14280 nfsidl nfsio 93729 70348 0 0 3 0x14280 nfsidl nfsio 92566 2482 0 0 3 0x14280 nfsidl nfsio 53649 501882 0 0 3 0x14280 nfsidl nfsio 11504 75052 0 0 3 0x14280 nfsidl nfsio 26580 245115 0 0 3 0x14280 nfsidl nfsio 88594 78834 0 0 3 0x14280 nfsidl nfsio 76805 417022 31370 0 3 0x3800 suspend syz-executor 76805 103459 31370 0 4 0x4081800 syz-executor 70698 221894 0 0 3 0x14200 bored sosplice 65722 154940 22934 0 3 0x100082 sbwait arp 22934 12631 11170 0 3 0x10008a sigsusp sh 11170 207567 11999 0 3 0x82 wait syz-executor 56997 124167 11999 0 2 0x482 syz-executor 31370 303862 11999 0 3 0x82 wait syz-executor 27306 422766 11999 0 2 0x2 syz-executor 7665 6232 11999 0 2 0x482 syz-executor 19050 229852 11999 0 2 0x482 syz-executor 9542 233857 11999 0 3 0x82 nanoslp syz-executor 25837 266576 11999 0 2 0x2 syz-executor 11999 16647 6062 0 2 0x2 syz-executor 6062 79777 84378 0 3 0x10008a sigsusp ksh 84378 329175 51701 0 3 0x98 kqread sshd-session 51701 376117 78876 0 3 0x92 kqread sshd-session 58393 264968 1 0 3 0x100083 ttyopn getty 78876 445018 1 0 3 0x88 kqread sshd 69565 52258 7367 74 3 0x1100092 bpf pflogd 7367 141712 1 0 3 0x80 sbwait pflogd 11443 323960 91041 73 3 0x1100090 kqread syslogd 91041 458457 1 0 3 0x100082 sbwait syslogd 12138 284649 1 0 3 0x100080 kqread resolvd 66558 19053 93803 77 3 0x100092 kqread dhcpleased 69292 203389 93803 77 3 0x100092 kqread dhcpleased 93803 74650 1 0 3 0x80 kqread dhcpleased 47925 48420 0 0 3 0x14200 bored smr 46151 463442 0 0 2 0x14200 zerothread 25793 400428 0 0 3 0x14200 aiodoned aiodoned 90091 490903 0 0 3 0x14200 syncer update 43293 462381 0 0 3 0x14200 cleaner cleaner 19384 151995 0 0 3 0x14200 reaper reaper 45990 56549 0 0 3 0x14200 pgdaemon pagedaemon 65572 123150 0 0 3 0x14200 bored viomb 97820 284968 0 0 3 0x40014200 acpi0 acpi0 95495 276993 0 0 3 0x40014200 idle1 70199 218954 0 0 3 0x14200 bored softnet3 57585 247156 0 0 3 0x14200 bored softnet2 71146 158178 0 0 3 0x14200 bored softnet1 43613 465292 0 0 2 0x14200 softnet0 17037 333772 0 0 3 0x14200 bored systqmp 98727 296096 0 0 3 0x14200 bored systq 31178 113676 0 0 3 0x14200 tmoslp softclockmp 44565 467951 0 0 2 0x40014200 softclock 21659 491799 0 0 3 0x40014200 idle0 1 472840 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{0}> show all locks Process 96399 (syz-executor) thread 0xffff8000394cea78 (335100) exclusive rwlock vmmaplk r = 0 (0xfffffd806beab118) #0 witness_lock+0x5bb stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5bb sys/kern/subr_witness.c:1155 #1 rw_do_enter_write+0x3ea sys/kern/kern_rwlock.c:316 #2 vm_map_lock_ln+0x12e sys/uvm/uvm_map.c:5250 #3 uvmfault_lookup+0xe8 sys/uvm/uvm_fault.c:1858 #4 uvm_fault_check+0x987 uvmfault_amapcopy sys/uvm/uvm_fault.c:235 [inline] #4 uvm_fault_check+0x987 sys/uvm/uvm_fault.c:774 #5 uvm_fault+0x106 sys/uvm/uvm_fault.c:668 #6 upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:188 #7 usertrap+0x2d8 sys/arch/amd64/amd64/trap.c:436 #8 recall_trap+0x8 Process 81729 (syz-executor) thread 0xffff8000394cf9d8 (486282) exclusive kernel_lock &kernel_lock r = 0 (0xffffffff838f2bb0) #0 witness_lock+0x5bb stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5bb sys/kern/subr_witness.c:1155 #1 __mp_acquire_count+0x58 #2 mi_switch+0x4b7 sys/kern/sched_bsd.c:441 #3 yield+0x6a sys/kern/sched_bsd.c:320 #4 malloc+0xe5 sys/kern/kern_malloc.c:174 #5 sys_semop+0x234 sys/kern/sysv_sem.c:564 #6 syscall+0xb08 mi_syscall sys/sys/syscall_mi.h:176 [inline] #6 syscall+0xb08 sys/arch/amd64/amd64/trap.c:577 #7 Xsyscall+0x128 Process 81729 (syz-executor) thread 0xffff8000394cfc68 (81702) exclusive rwlock futex r = 0 (0xffffffff8385c338) #0 witness_lock+0x5bb stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5bb sys/kern/subr_witness.c:1155 #1 rw_do_enter_write+0x3ea sys/kern/kern_rwlock.c:316 #2 sys_futex+0x69 sys/kern/sys_futex.c:98 #3 syscall+0xbc6 mi_syscall sys/sys/syscall_mi.h:176 [inline] #3 syscall+0xbc6 sys/arch/amd64/amd64/trap.c:577 #4 Xsyscall+0x128 Process 27306 (syz-executor) thread 0xffff80002a39d728 (422766) exclusive rrwlock inode r = 0 (0xfffffd806f180520) #0 witness_lock+0x5bb stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5bb sys/kern/subr_witness.c:1155 #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 ufs_ihashins+0x4f sys/ufs/ufs/ufs_ihash.c:159 #5 ffs_vget+0x187 sys/ufs/ffs/ffs_vfsops.c:1230 #6 ffs_inode_alloc+0x283 sys/ufs/ffs/ffs_alloc.c:393 #7 ufs_mkdir+0x113 sys/ufs/ufs/ufs_vnops.c:1112 #8 VOP_MKDIR+0x102 sys/kern/vfs_vops.c:394 #9 domkdirat+0x179 sys/kern/vfs_syscalls.c:3111 #10 syscall+0xb08 mi_syscall sys/sys/syscall_mi.h:176 [inline] #10 syscall+0xb08 sys/arch/amd64/amd64/trap.c:577 #11 Xsyscall+0x128 exclusive rrwlock inode r = 0 (0xfffffd806c33b538) #0 witness_lock+0x5bb stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5bb sys/kern/subr_witness.c:1155 #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 domkdirat+0x8b sys/kern/vfs_syscalls.c:3096 #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 25837 (syz-executor) thread 0xffff80002a39cf78 (266576) exclusive rrwlock inode r = 0 (0xfffffd80619d1ed8) #0 witness_lock+0x5bb stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5bb sys/kern/subr_witness.c:1155 #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 ufs_ihashins+0x4f sys/ufs/ufs/ufs_ihash.c:159 #5 ffs_vget+0x187 sys/ufs/ffs/ffs_vfsops.c:1230 #6 ffs_inode_alloc+0x283 sys/ufs/ffs/ffs_alloc.c:393 #7 ufs_mkdir+0x113 sys/ufs/ufs/ufs_vnops.c:1112 #8 VOP_MKDIR+0x102 sys/kern/vfs_vops.c:394 #9 domkdirat+0x179 sys/kern/vfs_syscalls.c:3111 #10 syscall+0xb08 mi_syscall sys/sys/syscall_mi.h:176 [inline] #10 syscall+0xb08 sys/arch/amd64/amd64/trap.c:577 #11 Xsyscall+0x128 exclusive rrwlock inode r = 0 (0xfffffd807a585418) #0 witness_lock+0x5bb stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5bb sys/kern/subr_witness.c:1155 #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 domkdirat+0x8b sys/kern/vfs_syscalls.c:3096 #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{0}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10198 11036K 11361K 166960K 11736 0 pcb 17 15K 16K 166960K 114 0 rtable 195 7K 9K 166960K 387 0 pf 34 17K 22K 166960K 85 0 ifaddr 37 6K 7K 166960K 59 0 ifgroup 51 2K 2K 166960K 91 0 sysctl 2 1K 1K 166960K 2 0 counters 62 36K 36K 166960K 88 0 ioctlops 0 0K 4K 166960K 1573 0 iov 0 0K 18K 166960K 23 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1333 84K 84K 166960K 1572 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 5K 166960K 8 0 VM map 2 1K 1K 166960K 2 0 sem 12 0K 0K 166960K 15 0 dirhash 12 2K 2K 166960K 18 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 17 61K 97K 166960K 437 0 sigio 0 0K 0K 166960K 3 0 proc 72 91K 128K 166960K 568 0 subproc 72 4K 4K 166960K 72 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 36 0 in_multi 77 5K 6K 166960K 99 0 ether_multi 1 0K 0K 166960K 1 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 79 360K 360K 166960K 79 0 exec 0 0K 1K 166960K 417 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 223 72K 91K 166960K 5755 0 UVM aobj 21 2K 2K 166960K 23 0 pinsyscall 43 86K 109K 166960K 1506 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 12 0 NDP 11 0K 1K 166960K 36 0 temp 58 8639K 8764K 166960K 18597 0 kqueue 13 20K 28K 166960K 69 0 SYN cache 2 16K 16K 166960K 2 0 ddb{0}> show all pools Name Size Requests Fail Releases Pgreq Pgrel Npage Hiwat Minpg Maxpg Idle plcache 128 24 0 0 1 0 1 1 0 8 0 rtpcb 120 50 0 46 1 0 1 1 0 8 0 rtentry 112 123 0 38 4 0 4 4 0 8 0 unpcb 144 183 0 164 2 1 1 2 0 8 0 syncache 336 3 0 3 1 1 0 1 0 8 0 tcpcb 808 67 0 61 1 0 1 1 0 8 0 arp 120 21 0 5 1 0 1 1 0 8 0 inpcb 376 409 0 398 8 6 2 8 0 8 0 nd6 136 25 0 3 1 0 1 1 0 8 0 pkpcb 40 5 0 5 3 2 1 1 0 8 1 kcovpl 48 8 0 0 1 0 1 1 0 8 0 ppxss 1168 6 0 6 1 1 0 1 0 8 0 pffrag 232 4 0 2 1 0 1 1 0 482 0 pffrnode 88 4 0 2 1 0 1 1 0 8 0 pffrent 40 6 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 pfrktable 1344 6 0 2 1 0 1 1 0 8 0 pfanchor 1288 2 0 0 1 0 1 1 0 8 0 pfstitem 24 42 0 1 1 0 1 1 0 8 0 pfstkey 128 42 0 1 2 0 2 2 0 8 0 pfstate 376 42 0 1 5 0 5 5 0 8 0 pfrule 1344 23 0 17 2 1 1 2 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 504 0 136 27 3 24 27 0 8 0 art_table 32 505 0 136 4 0 4 4 0 8 0 art_node 16 121 0 45 1 0 1 1 0 8 0 sysvmsgpl 40 7 0 2 1 0 1 1 0 8 0 semupl 112 1 0 0 1 0 1 1 0 8 0 semapl 112 11 0 2 1 0 1 1 0 8 0 shmpl 112 20 0 2 1 0 1 1 0 8 0 dirhash 1024 21 0 4 3 0 3 3 0 8 0 dino2pl 256 2126 0 628 95 0 95 95 0 8 0 ffsino 280 2126 0 628 109 0 109 109 0 8 0 nchpl 144 2774 0 1095 63 0 63 63 0 8 0 uvmvnodes 80 2337 0 0 48 0 48 48 0 8 0 vnodes 216 2337 0 0 130 0 130 130 0 8 0 namei 1024 8956 0 8954 2 1 1 2 0 8 0 percpumem 16 58 0 13 1 0 1 1 0 8 0 pfiaddrpl 120 2 0 0 1 0 1 1 0 8 0 kstatmem 264 44 0 22 2 0 2 2 0 8 0 scsiplug 72 2 0 2 1 1 0 1 0 8 0 scxspl 216 8750 0 8750 4 3 1 2 1 8 1 plimitpl 152 105 0 87 1 0 1 1 0 8 0 sigapl 424 756 0 686 9 0 9 9 0 8 0 futexpl 64 4825 0 4823 1 0 1 1 0 8 0 knotepl 120 312 0 0 10 0 10 10 0 8 0 kqueuepl 216 140 0 130 3 2 1 3 0 8 0 pipepl 328 125 0 98 3 0 3 3 0 8 0 fdescpl 504 717 0 686 6 0 6 6 0 8 0 filepl 152 3464 0 3240 13 3 10 13 0 8 0 lockfpl 104 101 0 99 1 0 1 1 0 8 0 lockfspl 48 42 0 40 1 0 1 1 0 8 0 sessionpl 144 22 0 13 1 0 1 1 0 8 0 pgrppl 48 30 0 13 1 0 1 1 0 8 0 ucredpl 104 435 0 422 1 0 1 1 0 8 0 zombiepl 144 690 0 688 1 0 1 1 0 8 0 processpl 1168 756 0 686 6 0 6 6 0 8 0 procpl 656 1295 0 1218 8 0 8 8 0 8 0 srpgc 96 2 0 2 1 1 0 1 0 8 0 sockpl 688 654 0 620 9 5 4 9 0 8 0 mcl64k 65536 1 0 0 1 0 1 1 0 8 0 mcl8k 8192 5 0 0 1 0 1 1 0 8 0 mcl4k 4096 128 0 0 16 0 16 16 0 8 0 mcl2k 2048 29 0 0 4 0 4 4 0 8 0 mtagpl 96 10 0 0 1 0 1 1 0 8 0 mbufpl 256 218 0 0 14 0 14 14 0 8 0 bufpl 280 2993 0 131 205 0 205 205 0 8 0 anonpl 24 79491 0 76122 30 5 25 30 0 184 0 amapchunkpl 152 17173 0 16701 28 6 22 28 0 158 0 amappl16 200 635 0 604 7 4 3 6 0 8 0 amappl14 184 119 0 106 1 0 1 1 0 8 0 amappl13 176 2 0 2 1 1 0 1 0 8 0 amappl12 168 1345 0 1313 4 1 3 3 0 8 0 amappl11 160 48 0 34 1 0 1 1 0 8 0 amappl10 152 21 0 20 1 0 1 1 0 8 0 amappl9 144 253 0 253 1 1 0 1 0 8 0 amappl8 136 20 0 17 1 0 1 1 0 8 0 amappl7 128 103 0 89 1 0 1 1 0 8 0 amappl6 120 164 0 160 1 0 1 1 0 8 0 amappl5 112 135 0 126 1 0 1 1 0 8 0 amappl4 104 315 0 295 1 0 1 1 0 8 0 amappl3 96 3316 0 3206 4 0 4 4 0 8 0 amappl2 88 623 0 558 2 0 2 2 0 8 0 amappl1 80 8612 0 8017 15 1 14 15 0 8 0 amappl 88 5348 0 5186 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 dma512 512 1 0 1 1 1 0 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 22 0 2 1 0 1 1 0 8 0 uaddrrnd 24 717 0 686 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 717 0 686 1 0 1 1 0 8 0 vmmpekpl 168 7469 0 7428 3 0 3 3 0 8 0 vmmpepl 168 47923 0 46074 90 4 86 89 0 357 0 vmsppl 456 716 0 686 5 0 5 5 0 8 0 rwobjpl 64 16563 0 13238 54 0 54 54 0 8 0 pdppl 4096 1442 0 1372 104 30 74 88 0 8 4 pvpl 32 13215 0 0 109 2 107 107 0 265 0 pmappl 248 716 0 686 3 0 3 3 0 8 0 extentpl 40 55 0 38 1 0 1 1 0 8 0 phpool 112 287 0 39 8 0 8 8 0 8 0 ddb{0}> machine ddbcpu 0 Invalid cpu 0 ddb{0}> trace sys_semop(ffff8000394cf9d8,ffff80003c5022c0,ffff80003c502210) at sys_semop+0x45b sys/kern/sysv_sem.c:615 syscall(ffff80003c5022c0) at syscall+0xb08 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003c5022c0) at syscall+0xb08 sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x704aff2fd50, count: -3 ddb{0}> machine ddbcpu 1 Stopped at x86_ipi_db+0x27: addq $0x8,%rsp ddb{1}> trace x86_ipi_db(ffff800029aabff0) 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 end of kernel end trace frame: 0x700153051e50, count: -3