kernel: protection fault trap, code=0 Stopped at ktrops+0x4e: movq 0x8(%rbx),%r14 ddb{0}> ddb{0}> set $lines = 0 ddb{0}> set $maxwidth = 0 ddb{0}> show panic the kernel did not panic ddb{0}> trace ktrops(ffff8000211fdaa8,dead4110dead4110,0,80000008,fffffd80672509a0,fffffd807f7d76e8) at ktrops+0x4e ktrcanset sys/kern/kern_ktrace.c:700 [inline] ktrops(ffff8000211fdaa8,dead4110dead4110,0,80000008,fffffd80672509a0,fffffd807f7d76e8) at ktrops+0x4e sys/kern/kern_ktrace.c:543 doktrace(fffffd80672509a0,4,8,0,ffff8000211fdaa8) at doktrace+0x524 ktrsetchildren sys/kern/kern_ktrace.c:568 [inline] doktrace(fffffd80672509a0,4,8,0,ffff8000211fdaa8) at doktrace+0x524 sys/kern/kern_ktrace.c:490 sys_ktrace(ffff8000211fdaa8,ffff80002fe29850,ffff80002fe298a0) at sys_ktrace+0xd6 sys/kern/kern_ktrace.c:531 syscall(ffff80002fe29920) at syscall+0x5e2 mi_syscall sys/sys/syscall_mi.h:110 [inline] syscall(ffff80002fe29920) at syscall+0x5e2 sys/arch/amd64/amd64/trap.c:623 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x19a1d4fd260, count: -5 ddb{0}> show registers rdi 0xffff8000211fdaa8 rsi 0xdead4110dead4110 rbp 0xffff80002fe29640 rbx 0xdead4110dead4110 rdx 0 rcx 0xffff8000211fdaa8 rax 0xffffffff82c3aff0 cpu_info_full_primary+0x1ff0 r8 0xfffffd80672509a0 r9 0xfffffd807f7d76e8 r10 0xcc180db8dde657aa r11 0xa297a8c0cb618c1b r12 0xdead4110dead4110 r13 0xfffffd807f7d76e8 r14 0xffff8000211fdaa8 r15 0x80000008 __kernel_virt_to_phys+0x8 rip 0xffffffff825d02ce ktrops+0x4e cs 0x8 rflags 0x10246 __ALIGN_SIZE+0xf246 rsp 0xffff80002fe295c0 ss 0x10 ktrops+0x4e: movq 0x8(%rbx),%r14 ddb{0}> show proc PROC (syz-executor.7) tid=202876 pid=99136 tcnt=4 stat=onproc flags process=0 proc=4000000 runpri=17, usrpri=83, slppri=17, nice=20 wchan=0x0, wmesg=, ps_single=0x0 forw=0xffffffffffffffff, list=0xffff80002122dd38,0xffff800021294578 process=0xffff8000212a9508 user=0xffff80002fe24000, vmspace=0xfffffd80768b71f0 estcpu=36, cpticks=0, pctcpu=0.0, user=0, sys=0, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND 23143 446142 10831 0 2 0 syz-executor.4 23143 72962 10831 0 3 0x4000080 fsleep syz-executor.4 23143 82754 10831 0 3 0x4000080 fsleep syz-executor.4 99136 41326 70227 0 2 0 syz-executor.7 99136 38669 70227 0 3 0x4000080 fsleep syz-executor.7 *99136 202876 70227 0 7 0x4000000 syz-executor.7 99136 349979 70227 0 2 0x4000000 syz-executor.7 7070 94208 0 0 3 0x14280 nfsidl nfsio 53474 144433 0 0 3 0x14280 nfsidl nfsio 41429 246524 0 0 3 0x14280 nfsidl nfsio 73140 80404 0 0 3 0x14280 nfsidl nfsio 47038 391154 0 0 3 0x14280 nfsidl nfsio 51868 221017 0 0 3 0x14280 nfsidl nfsio 73289 305630 0 0 3 0x14280 nfsidl nfsio 35034 156020 0 0 3 0x14280 nfsidl nfsio 626 165811 0 0 3 0x14280 nfsidl nfsio 36200 112679 0 0 3 0x14280 nfsidl nfsio 96161 271229 0 0 3 0x14280 nfsidl nfsio 56283 212209 0 0 3 0x14280 nfsidl nfsio 65796 519484 0 0 3 0x14280 nfsidl nfsio 12417 519414 0 0 3 0x14280 nfsidl nfsio 64806 54510 0 0 3 0x14280 nfsidl nfsio 88801 250938 0 0 3 0x14280 nfsidl nfsio 57286 386356 0 0 3 0x14280 nfsidl nfsio 33853 202820 0 0 3 0x14280 nfsidl nfsio 60543 364382 0 0 3 0x14280 nfsidl nfsio 76529 189945 0 0 3 0x14280 nfsidl nfsio 10831 195425 63674 0 3 0x82 nanoslp syz-executor.4 70227 367060 63674 0 3 0x82 nanoslp syz-executor.7 9026 485143 32112 0 3 0x100082 netio arp 32112 292754 1 0 3 0x10008a sigsusp sh 52200 304402 63674 0 2 0x482 syz-executor.6 96719 280658 63674 0 3 0x82 nanoslp syz-executor.5 1670 489596 63674 0 2 0x2 syz-executor.3 97825 205230 63674 0 2 0x2 syz-executor.2 49396 509716 63674 0 3 0x82 nanoslp syz-executor.1 48927 36145 63674 0 2 0x2 syz-executor.0 63674 432612 69772 0 3 0x2000082 thrsleep syz-fuzzer 63674 36536 69772 0 3 0x6000082 nanoslp syz-fuzzer 63674 222037 69772 0 3 0x6000082 thrsleep syz-fuzzer 63674 302604 69772 0 3 0x6000082 wait syz-fuzzer 63674 214786 69772 0 3 0x6000082 wait syz-fuzzer 63674 434610 69772 0 3 0x6000082 wait syz-fuzzer 63674 498262 69772 0 3 0x6000082 wait syz-fuzzer 63674 326526 69772 0 3 0x6000082 thrsleep syz-fuzzer 63674 443783 69772 0 3 0x6000082 wait syz-fuzzer 63674 318580 69772 0 3 0x6000082 thrsleep syz-fuzzer 63674 383338 69772 0 3 0x6000082 wait syz-fuzzer 63674 443590 69772 0 3 0x6000082 wait syz-fuzzer 63674 420400 69772 0 3 0x6000082 thrsleep syz-fuzzer 63674 259785 69772 0 2 0x6000082 syz-fuzzer 63674 213214 69772 0 3 0x6000082 wait syz-fuzzer 63674 333150 69772 0 2 0x6000082 syz-fuzzer 69772 417267 9970 0 3 0x10008a sigsusp ksh 9970 38379 93553 0 2 0x9a sshd 44414 383727 1 0 3 0x100083 ttyin getty 93553 240508 1 0 3 0x88 kqread sshd 98621 482904 85163 74 3 0x1100092 bpf pflogd 85163 491043 1 0 3 0x80 netio pflogd 58067 266334 63615 73 3 0x1100090 kqread syslogd 63615 268894 1 0 3 0x100082 netio syslogd 48026 261119 1 0 3 0x100080 kqread resolvd 15988 173964 13660 77 3 0x100092 kqread dhcpleased 80925 332917 13660 77 3 0x100092 kqread dhcpleased 13660 292106 1 0 3 0x80 kqread dhcpleased 27170 307574 0 0 3 0x14200 bored smr 86882 450722 0 0 2 0x14200 zerothread 25494 181518 0 0 3 0x14200 aiodoned aiodoned 56536 238245 0 0 2 0x14600 update 22931 156914 0 0 3 0x14200 cleaner cleaner 88273 496501 0 0 7 0x14200 reaper 1857 243692 0 0 3 0x14200 pgdaemon pagedaemon 27003 519836 0 0 3 0x14200 bored viomb 92149 408269 0 0 3 0x40014200 acpi0 acpi0 38279 138658 0 0 3 0x40014200 idle1 86952 147288 0 0 3 0x14200 bored softnet3 32545 343166 0 0 3 0x14200 bored softnet2 15434 210242 0 0 3 0x14200 bored softnet1 50902 177194 0 0 3 0x14200 bored softnet0 50530 258906 0 0 3 0x14200 bored systqmp 66133 321514 0 0 3 0x14200 bored systq 85211 483361 0 0 3 0x14200 tmoslp softclockmp 36401 48489 0 0 2 0x40014200 softclock 31545 453814 0 0 3 0x40014200 idle0 1 506146 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{0}> show all locks Process 99136 (syz-executor.7) thread 0xffff8000211fdaa8 (202876) exclusive kernel_lock &kernel_lock r = 0 (0xffffffff82ca89c0) #0 witness_lock+0x447 #1 __mp_acquire_count+0x48 sys/kern/kern_lock.c:227 #2 mi_switch+0x46d sys/kern/sched_bsd.c:470 #3 sleep_finish+0x19b sys/kern/kern_synch.c:414 #4 biowait+0x91 sys/kern/vfs_bio.c:1278 #5 bwrite+0x21c sys/kern/vfs_bio.c:769 #6 ffs_update+0x281 sys/ufs/ffs/ffs_inode.c:113 #7 ffs_truncate+0xce7 #8 ufs_inactive+0x152 sys/ufs/ufs/ufs_inode.c:84 #9 VOP_INACTIVE+0xc5 sys/kern/vfs_vops.c:489 #10 vrele+0xd3 sys/kern/vfs_subr.c:827 #11 ktrsettrace+0xb7 sys/kern/kern_ktrace.c:122 #12 ktrops+0x1a8 sys/kern/kern_ktrace.c:546 #13 doktrace+0x524 ktrsetchildren sys/kern/kern_ktrace.c:568 [inline] #13 doktrace+0x524 sys/kern/kern_ktrace.c:490 #14 sys_ktrace+0xd6 sys/kern/kern_ktrace.c:531 #15 syscall+0x5e2 mi_syscall sys/sys/syscall_mi.h:110 [inline] #15 syscall+0x5e2 sys/arch/amd64/amd64/trap.c:623 #16 Xsyscall+0x128 Process 1670 (syz-executor.3) thread 0xffff8000211e9010 (489596) exclusive rrwlock inode r = 0 (0xfffffd805aaabd58) #0 witness_lock+0x447 #1 rw_enter+0x3c8 sys/kern/kern_rwlock.c:309 #2 rrw_enter+0x8c sys/kern/kern_rwlock.c:464 #3 VOP_LOCK+0x8b sys/kern/vfs_vops.c:518 #4 ufs_ihashins+0x46 sys/ufs/ufs/ufs_ihash.c:140 #5 ffs_vget+0x141 sys/ufs/ffs/ffs_vfsops.c:1343 #6 ffs_inode_alloc+0x1c2 sys/ufs/ffs/ffs_alloc.c:394 #7 ufs_mkdir+0xf8 sys/ufs/ufs/ufs_vnops.c:1149 #8 VOP_MKDIR+0xc3 sys/kern/vfs_vops.c:388 #9 domkdirat+0x125 sys/kern/vfs_syscalls.c:3073 #10 syscall+0x5e2 mi_syscall sys/sys/syscall_mi.h:110 [inline] #10 syscall+0x5e2 sys/arch/amd64/amd64/trap.c:623 #11 Xsyscall+0x128 exclusive rrwlock inode r = 0 (0xfffffd806c29a5f8) #0 witness_lock+0x447 #1 rw_enter+0x3c8 sys/kern/kern_rwlock.c:309 #2 rrw_enter+0x8c sys/kern/kern_rwlock.c:464 #3 VOP_LOCK+0x8b sys/kern/vfs_vops.c:518 #4 vn_lock+0x84 sys/kern/vfs_vnops.c:564 #5 vfs_lookup+0xd5 sys/kern/vfs_lookup.c:418 #6 namei+0x55a sys/kern/vfs_lookup.c:250 #7 domkdirat+0x79 sys/kern/vfs_syscalls.c:3058 #8 syscall+0x5e2 mi_syscall sys/sys/syscall_mi.h:110 [inline] #8 syscall+0x5e2 sys/arch/amd64/amd64/trap.c:623 #9 Xsyscall+0x128 Process 97825 (syz-executor.2) thread 0xffff8000211a37f0 (205230) exclusive rrwlock inode r = 0 (0xfffffd805aaabf78) #0 witness_lock+0x447 #1 rw_enter+0x3c8 sys/kern/kern_rwlock.c:309 #2 rrw_enter+0x8c sys/kern/kern_rwlock.c:464 #3 VOP_LOCK+0x8b sys/kern/vfs_vops.c:518 #4 ufs_ihashins+0x46 sys/ufs/ufs/ufs_ihash.c:140 #5 ffs_vget+0x141 sys/ufs/ffs/ffs_vfsops.c:1343 #6 ffs_inode_alloc+0x1c2 sys/ufs/ffs/ffs_alloc.c:394 #7 ufs_mkdir+0xf8 sys/ufs/ufs/ufs_vnops.c:1149 #8 VOP_MKDIR+0xc3 sys/kern/vfs_vops.c:388 #9 domkdirat+0x125 sys/kern/vfs_syscalls.c:3073 #10 syscall+0x5e2 mi_syscall sys/sys/syscall_mi.h:110 [inline] #10 syscall+0x5e2 sys/arch/amd64/amd64/trap.c:623 #11 Xsyscall+0x128 exclusive rrwlock inode r = 0 (0xfffffd806bbb36f8) #0 witness_lock+0x447 #1 rw_enter+0x3c8 sys/kern/kern_rwlock.c:309 #2 rrw_enter+0x8c sys/kern/kern_rwlock.c:464 #3 VOP_LOCK+0x8b sys/kern/vfs_vops.c:518 #4 vn_lock+0x84 sys/kern/vfs_vnops.c:564 #5 vfs_lookup+0xd5 sys/kern/vfs_lookup.c:418 #6 namei+0x55a sys/kern/vfs_lookup.c:250 #7 domkdirat+0x79 sys/kern/vfs_syscalls.c:3058 #8 syscall+0x5e2 mi_syscall sys/sys/syscall_mi.h:110 [inline] #8 syscall+0x5e2 sys/arch/amd64/amd64/trap.c:623 #9 Xsyscall+0x128 ddb{0}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10189 6495K 6760K 78643K 53980 0 pcb 13 14K 16K 78643K 1331 0 rtable 234 6K 6K 78643K 356 0 pf 32 9K 10K 78643K 45 0 ifaddr 45 15K 15K 78643K 49 0 ifgroup 55 2K 2K 78643K 59 0 sysctl 3 0K 0K 78643K 3 0 counters 60 35K 35K 78643K 62 0 ioctlops 0 0K 4K 78643K 97976 0 iov 0 0K 12K 78643K 3784 0 mount 1 1K 1K 78643K 1 0 log 0 0K 0K 78643K 4 0 vnodes 1424 89K 89K 78643K 21339 0 UFS quota 1 32K 32K 78643K 1 0 UFS mount 5 36K 36K 78643K 5 0 shm 2 1K 9K 78643K 762 0 VM map 2 1K 1K 78643K 2 0 sem 12 0K 0K 78643K 4853 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1697 195K 286K 78643K 12548 0 file desc 14 49K 93K 78643K 97014 0 sigio 0 0K 0K 78643K 2428 0 proc 68 91K 115K 78643K 548 0 subproc 117 7K 7K 78643K 117 0 NFS srvsock 1 0K 0K 78643K 1 0 NFS daemon 1 16K 16K 78643K 1 0 in_multi 99 7K 7K 78643K 100 0 ether_multi 1 0K 0K 78643K 1 0 ISOFS mount 1 32K 32K 78643K 1 0 MSDOSFS mount 1 16K 16K 78643K 1 0 ttys 25 122K 122K 78643K 25 0 exec 0 0K 1K 78643K 387 0 tdb 3 0K 0K 78643K 3 0 pagedep 1 8K 8K 78643K 1 0 inodedep 1 32K 32K 78643K 1 0 newblk 1 0K 0K 78643K 1 0 VM swap 8 62K 64K 78643K 10 0 UVM amap 343 84K 85K 78643K 863728 0 UVM aobj 131 11K 11K 78643K 132 0 memdesc 1 4K 4K 78643K 1 0 crypto data 1 1K 1K 78643K 1 0 NDP 12 0K 1K 78643K 29 0 temp 73 5920K 6048K 78643K 344204 0 kqueue 12 18K 31K 78643K 4384 0 SYN cache 2 16K 16K 78643K 2 0 ddb{0}> show all pools Name Size Requests Fail Releases Pgreq Pgrel Npage Hiwat Minpg Maxpg Idle plcache 128 22 0 0 1 0 1 1 0 8 0 rtpcb 120 34 0 30 1 0 1 1 0 8 0 rtentry 112 114 0 4 4 0 4 4 0 8 0 unpcb 144 32861 0 32846 135 134 1 10 0 8 0 syncache 312 4 0 4 1 1 0 1 0 8 0 tcpqe 32 121 0 121 1 1 0 1 0 8 0 tcpcb 808 3022 0 3018 32 31 1 11 0 8 0 arp 120 19 0 1 1 0 1 1 0 8 0 inpcb 368 8800 0 8793 102 95 7 10 0 8 6 nd6 136 24 0 0 1 0 1 1 0 8 0 kcovpl 48 9 0 0 1 0 1 1 0 8 0 pffrag 232 10 0 10 1 1 0 1 0 482 0 pffrnode 88 7 0 7 1 1 0 1 0 8 0 pffrent 40 175 0 175 1 1 0 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 34 0 32 1 0 1 1 0 8 0 pfstkey 128 34 0 32 1 0 1 1 0 8 0 pfstate 376 34 0 32 3 2 1 3 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 256 454 0 3 29 0 29 29 0 8 0 art_table 32 455 0 3 4 0 4 4 0 8 0 art_node 16 113 0 13 1 0 1 1 0 8 0 semapl 112 4851 0 4841 1 0 1 1 0 8 0 shmpl 112 129 0 1 4 0 4 4 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 107856 0 105744 133 0 133 133 0 8 0 ffsino 272 107856 0 105744 142 0 142 142 0 8 0 nchpl 144 230051 0 228392 63 0 63 63 0 8 0 uvmvnodes 80 5926 0 0 121 0 121 121 0 8 0 vnodes 216 5926 0 0 330 0 330 330 0 8 0 namei 1024 617367 0 617365 5 4 1 2 0 8 0 percpumem 16 44 0 1 1 0 1 1 0 8 0 kstatmem 264 26 0 2 2 0 2 2 0 8 0 scxspl 216 636757 0 636757 11 9 2 8 1 8 2 plimitpl 152 3292 0 3275 1 0 1 1 0 8 0 sigapl 424 97345 0 97277 9 1 8 8 0 8 0 futexpl 64 585942 0 585939 2 1 1 1 0 8 0 knotepl 120 126 0 0 4 0 4 4 0 8 0 kqueuepl 216 15778 0 15770 97 96 1 12 0 8 0 pipepl 320 116102 0 116071 574 565 9 23 0 8 6 fdescpl 496 97307 0 97280 5 0 5 5 0 8 0 filepl 152 554446 0 554155 690 672 18 29 0 8 6 lockfpl 104 10866 0 10864 18 17 1 2 0 8 0 lockfspl 48 3888 0 3886 1 0 1 1 0 8 0 sessionpl 144 25 0 7 1 0 1 1 0 8 0 pgrppl 48 1690 0 1672 1 0 1 1 0 8 0 ucredpl 104 1417 0 1405 1 0 1 1 0 8 0 zombiepl 144 97280 0 97277 2 1 1 1 0 8 0 processpl 1072 97345 0 97277 5 0 5 5 0 8 0 procpl 680 227252 0 227164 39 30 9 10 0 8 1 sockpl 488 41695 0 41669 694 682 12 35 0 8 8 mcl64k 65536 22 0 0 3 0 3 3 0 8 0 mcl16k 16384 17 0 0 3 0 3 3 0 8 0 mcl12k 12288 57 0 0 2 0 2 2 0 8 0 mcl9k 9216 33 0 0 2 0 2 2 0 8 0 mcl8k 8192 61 0 0 5 2 3 3 0 8 0 mcl4k 4096 137 0 0 9 6 3 9 0 8 0 mcl2k2 2112 25 0 0 2 0 2 2 0 8 0 mcl2k 2048 486 0 0 38 25 13 38 0 8 0 mtagpl 96 2 0 0 1 0 1 1 0 8 0 mbufpl 256 1821 0 0 22 13 9 20 0 8 0 bufpl 288 110367 0 104046 452 0 452 452 0 8 0 anonpl 24 6791996 0 6782996 109 49 60 80 0 186 0 amapchunkpl 152 2711759 0 2711024 211 177 34 36 0 158 3 amappl16 200 105495 0 105279 35 23 12 25 0 8 0 amappl15 192 39 0 39 1 1 0 1 0 8 0 amappl14 184 187 0 171 2 1 1 2 0 8 0 amappl13 176 64 0 64 1 1 0 1 0 8 0 amappl12 168 97973 0 97943 4 2 2 3 0 8 0 amappl11 160 55 0 41 1 0 1 1 0 8 0 amappl10 152 34 0 24 1 0 1 1 0 8 0 amappl9 144 293 0 291 1 0 1 1 0 8 0 amappl8 136 1721 0 1611 4 0 4 4 0 8 0 amappl7 128 236 0 210 2 0 2 2 0 8 0 amappl6 120 440 0 426 1 0 1 1 0 8 0 amappl5 112 1028 0 1016 1 0 1 1 0 8 0 amappl4 104 769 0 739 2 1 1 2 0 8 0 amappl3 96 543678 0 543592 4 1 3 3 0 8 0 amappl2 88 100727 0 100652 3 1 2 3 0 8 0 amappl1 80 335182 0 334609 23 10 13 23 0 8 0 amappl 88 863120 0 862922 6 0 6 6 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 dma256 256 6 0 6 1 1 0 1 0 8 0 dma128 128 253 0 253 1 1 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 72 131 0 1 3 0 3 3 0 8 0 uaddrrnd 24 97307 0 97279 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 97307 0 97279 1 0 1 1 0 8 0 vmmpekpl 168 1007069 0 1007009 6 2 4 5 0 8 0 vmmpepl 168 5217650 0 5215526 296 192 104 116 0 357 2 vmsppl 464 97306 0 97279 5 0 5 5 0 8 0 rwobjpl 56 1083176 0 1075735 114 8 106 109 0 8 0 pdppl 4096 194622 0 194558 2040 1966 74 84 0 8 10 pvpl 32 24297676 0 24282677 525 390 135 338 0 265 0 pmappl 248 97306 0 97279 3 0 3 3 0 8 0 extentpl 40 56 0 38 1 0 1 1 0 8 0 phpool 112 3062 0 2175 26 0 26 26 0 8 0 ddb{0}> machine ddbcpu 0 Invalid cpu 0 ddb{0}> trace ktrops(ffff8000211fdaa8,dead4110dead4110,0,80000008,fffffd80672509a0,fffffd807f7d76e8) at ktrops+0x4e ktrcanset sys/kern/kern_ktrace.c:700 [inline] ktrops(ffff8000211fdaa8,dead4110dead4110,0,80000008,fffffd80672509a0,fffffd807f7d76e8) at ktrops+0x4e sys/kern/kern_ktrace.c:543 doktrace(fffffd80672509a0,4,8,0,ffff8000211fdaa8) at doktrace+0x524 ktrsetchildren sys/kern/kern_ktrace.c:568 [inline] doktrace(fffffd80672509a0,4,8,0,ffff8000211fdaa8) at doktrace+0x524 sys/kern/kern_ktrace.c:490 sys_ktrace(ffff8000211fdaa8,ffff80002fe29850,ffff80002fe298a0) at sys_ktrace+0xd6 sys/kern/kern_ktrace.c:531 syscall(ffff80002fe29920) at syscall+0x5e2 mi_syscall sys/sys/syscall_mi.h:110 [inline] syscall(ffff80002fe29920) at syscall+0x5e2 sys/arch/amd64/amd64/trap.c:623 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x19a1d4fd260, count: -5 ddb{0}> machine ddbcpu 1 Stopped at x86_ipi_db+0x1e: addq $0x8,%rsp ddb{1}> trace x86_ipi_db(ffff800020d48ff0) at x86_ipi_db+0x1e sys/arch/amd64/amd64/db_interface.c:393 x86_ipi_handler() at x86_ipi_handler+0xb7 sys/arch/amd64/amd64/ipi.c:106 Xresume_lapic_ipi() at Xresume_lapic_ipi+0x27 __mp_lock(ffffffff82ca87b8) at __mp_lock+0x122 __mp_lock_spin sys/kern/kern_lock.c:116 [inline] __mp_lock(ffffffff82ca87b8) at __mp_lock+0x122 sys/kern/kern_lock.c:147 reaper(ffff8000211a2d50) at reaper+0x160 sys/kern/kern_exit.c:446 end trace frame: 0x0, count: -5