uvm_fault(0xfffffd8067bddcd8, 0x7, 0, 1) -> e kernel: page fault trap, code=0 Stopped at witness_checkorder+0x1ec: movl 0x8(%r14),%ebx TID PID UID PRFLAGS PFLAGS CPU COMMAND 171837 25319 0 0x14000 0x200 1 reaper witness_checkorder(fffffd806f0fb298,9,0) at witness_checkorder+0x1ec sys/kern/subr_witness.c:794 mtx_enter(fffffd806f0fb288) at mtx_enter+0x3e sys/kern/kern_lock.c:265 knote_remove(ffff800021274010,fffffd806f0fb288,fffffd806f0fb310,0,0) at knote_remove+0x20d sys/kern/kern_event.c:1881 knote_fdclose(ffff800021274010,0) at knote_fdclose+0xae sys/kern/kern_event.c:1934 fdfree(ffff800021274010) at fdfree+0xdf sys/kern/kern_descrip.c:1196 exit1(ffff800021274010,0,0,1) at exit1+0x3e4 sys/kern/kern_exit.c:206 sys_exit(ffff800021274010,ffff800022cdb990,ffff800022cdb9e0) at sys_exit+0x1a sys/kern/kern_exit.c:89 syscall(ffff800022cdba60) at syscall+0x5e2 mi_syscall sys/sys/syscall_mi.h:110 [inline] syscall(ffff800022cdba60) at syscall+0x5e2 sys/arch/amd64/amd64/trap.c:623 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x73c1d37210e0, count: 6 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{0}> ddb{0}> set $lines = 0 ddb{0}> set $maxwidth = 0 ddb{0}> show panic *cpu0: uvm_fault(0xfffffd8067bddcd8, 0x7, 0, 1) -> e ddb{0}> trace witness_checkorder(fffffd806f0fb298,9,0) at witness_checkorder+0x1ec sys/kern/subr_witness.c:794 mtx_enter(fffffd806f0fb288) at mtx_enter+0x3e sys/kern/kern_lock.c:265 knote_remove(ffff800021274010,fffffd806f0fb288,fffffd806f0fb310,0,0) at knote_remove+0x20d sys/kern/kern_event.c:1881 knote_fdclose(ffff800021274010,0) at knote_fdclose+0xae sys/kern/kern_event.c:1934 fdfree(ffff800021274010) at fdfree+0xdf sys/kern/kern_descrip.c:1196 exit1(ffff800021274010,0,0,1) at exit1+0x3e4 sys/kern/kern_exit.c:206 sys_exit(ffff800021274010,ffff800022cdb990,ffff800022cdb9e0) at sys_exit+0x1a sys/kern/kern_exit.c:89 syscall(ffff800022cdba60) at syscall+0x5e2 mi_syscall sys/sys/syscall_mi.h:110 [inline] syscall(ffff800022cdba60) at syscall+0x5e2 sys/arch/amd64/amd64/trap.c:623 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x73c1d37210e0, count: -9 ddb{0}> show registers rdi 0 rsi 0x20000 acpi_pdirpa+0xbe63 rbp 0xffff800022cdb730 rbx 0xe rdx 0 rcx 0xffff800021274010 rax 0xffffffff82c39ff0 cpu_info_full_primary+0x1ff0 r8 0x1 r9 0 r10 0xb52151fd30bb83e1 r11 0x6eef23a0dbd0ba21 r12 0 r13 0xfffffd806f0fb298 r14 0xffffffffffffffff r15 0xffff800021274010 rip 0xffffffff826c515c witness_checkorder+0x1ec cs 0x8 rflags 0x10246 __ALIGN_SIZE+0xf246 rsp 0xffff800022cdb680 ss 0x10 witness_checkorder+0x1ec: movl 0x8(%r14),%ebx ddb{0}> show proc PROC (syz-executor.1) pid=236908 stat=onproc flags process=1018 proc=2000 pri=0, usrpri=82, nice=20 forw=0xffffffffffffffff, list=0xffff8000211f4d60,0xffff8000211ef010 process=0xffff8000ffffa188 user=0xffff800022cd6000, vmspace=0xfffffd8067bddcd8 estcpu=32, cpticks=2, pctcpu=0.0 user=0, sys=0, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND 54940 422732 65300 32767 2 0x10 syz-executor.6 3205 114578 21084 32767 2 0x10 syz-executor.0 89025 470724 40317 32767 3 0x90 nanoslp syz-executor.2 89025 115680 40317 32767 3 0x4000090 ttyin syz-executor.2 89025 200983 40317 32767 3 0x4000090 fsleep syz-executor.2 8459 5891 22320 32767 3 0x90 nanoslp syz-executor.1 22320 506083 78661 0 3 0x82 wait syz-executor.1 57072 516085 35603 32767 2 0x10 syz-executor.5 35603 382425 78661 0 3 0x82 wait syz-executor.5 55657 432919 75168 32767 2 0x10 syz-executor.3 75168 74499 78661 0 3 0x82 wait syz-executor.3 99732 158115 41406 32767 2 0x10 syz-executor.4 41406 414785 78661 0 3 0x82 wait syz-executor.4 40317 403424 49105 32767 3 0x90 nanoslp syz-executor.2 49105 515790 78661 0 3 0x82 wait syz-executor.2 21084 396887 25904 32767 3 0x90 nanoslp syz-executor.0 25904 432534 78661 0 3 0x82 wait syz-executor.0 8860 217026 51947 32767 2 0x10 syz-executor.7 51947 423947 78661 0 3 0x82 wait syz-executor.7 26413 101481 0 0 3 0x14200 bored sosplice 65300 342391 83858 32767 2 0x10 syz-executor.6 83858 512423 78661 0 3 0x82 wait syz-executor.6 78661 373241 92161 0 3 0x2000082 thrsleep syz-fuzzer 78661 274574 92161 0 3 0x6000082 nanoslp syz-fuzzer 78661 91571 92161 0 3 0x6000082 thrsleep syz-fuzzer 78661 235286 92161 0 3 0x6000082 kqread syz-fuzzer 78661 190317 92161 0 3 0x6000082 wait syz-fuzzer 78661 434405 92161 0 3 0x6000082 thrsleep syz-fuzzer 78661 308411 92161 0 3 0x6000082 thrsleep syz-fuzzer 78661 238606 92161 0 3 0x6000082 wait syz-fuzzer 78661 237569 92161 0 3 0x6000082 wait syz-fuzzer 78661 190170 92161 0 3 0x6000082 wait syz-fuzzer 78661 132021 92161 0 3 0x6000082 thrsleep syz-fuzzer 78661 234603 92161 0 3 0x6000082 wait syz-fuzzer 78661 28254 92161 0 3 0x6000082 thrsleep syz-fuzzer 78661 53067 92161 0 3 0x6000082 wait syz-fuzzer 78661 426108 92161 0 3 0x6000082 wait syz-fuzzer 78661 310355 92161 0 3 0x6000082 wait syz-fuzzer 92161 233312 32135 0 3 0x10008a sigsusp ksh 32135 50750 20614 0 3 0x9a kqread sshd 99374 519360 1 0 3 0x100083 ttyin getty 20614 115540 1 0 3 0x88 kqread sshd 89299 255676 4681 73 3 0x1100090 kqread syslogd 4681 231859 1 0 3 0x100082 netio syslogd 79563 345997 1 0 3 0x100080 kqread resolvd 66288 195383 38881 77 3 0x100092 kqread dhcpleased 15295 481483 38881 77 3 0x100092 kqread dhcpleased 38881 397250 1 0 3 0x80 kqread dhcpleased 74167 3775 0 0 3 0x14200 bored smr 52655 86054 0 0 2 0x14200 zerothread 87470 390441 0 0 3 0x14200 aiodoned aiodoned 13800 353415 0 0 3 0x14200 syncer update 15939 201814 0 0 3 0x14200 cleaner cleaner 25319 171837 0 0 7 0x14200 reaper 52346 58910 0 0 3 0x14200 pgdaemon pagedaemon 80807 205882 0 0 3 0x14200 bored viomb 50688 508254 0 0 3 0x40014200 acpi0 acpi0 81187 495127 0 0 3 0x40014200 idle1 40261 56993 0 0 3 0x14200 bored softnet3 81272 402079 0 0 3 0x14200 bored softnet2 95573 485241 0 0 3 0x14200 bored softnet1 52375 276658 0 0 3 0x14200 bored softnet0 89554 184494 0 0 3 0x14200 bored systqmp 36747 396200 0 0 3 0x14200 bored systq 74762 69680 0 0 3 0x40014200 bored softclock 85645 441094 0 0 3 0x40014200 idle0 1 496990 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{0}> show all locks Process 55657 (syz-executor.3) thread 0xffff80002121a570 (432919) exclusive rrwlock inode r = 0 (0xfffffd80682e6c58) #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 (0xfffffd8079a0a5f0) #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 99732 (syz-executor.4) thread 0xffff8000211d8550 (158115) exclusive rrwlock inode r = 0 (0xfffffd80682e61b8) #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 vget+0x200 sys/kern/vfs_subr.c:676 #6 ufs_ihashget+0x121 sys/ufs/ufs/ufs_ihash.c:119 #7 ffs_vget+0x7c sys/ufs/ffs/ffs_vfsops.c:1314 #8 ufs_lookup+0x13ba sys/ufs/ufs/ufs_lookup.c:487 #9 VOP_LOOKUP+0x5c sys/kern/vfs_vops.c:85 #10 vfs_lookup+0x6e2 sys/kern/vfs_lookup.c:566 #11 namei+0x55a sys/kern/vfs_lookup.c:250 #12 dounlinkat+0x9d sys/kern/vfs_syscalls.c:1847 #13 syscall+0x5e2 mi_syscall sys/sys/syscall_mi.h:110 [inline] #13 syscall+0x5e2 sys/arch/amd64/amd64/trap.c:623 #14 Xsyscall+0x128 exclusive rrwlock inode r = 0 (0xfffffd806d7b6b48) #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 dounlinkat+0x9d sys/kern/vfs_syscalls.c:1847 #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 10205 6411K 6420K 78643K 11341 0 pcb 13 14K 18K 78643K 17 0 rtable 246 7K 7K 78643K 1737 0 pf 29 8K 8K 78643K 67 0 ifaddr 44 15K 15K 78643K 124 0 ifgroup 50 2K 2K 78643K 126 0 sysctl 2 0K 1K 78643K 5 0 counters 60 35K 35K 78643K 98 0 ioctlops 0 0K 2K 78643K 86 0 iov 0 0K 24K 78643K 1497 0 mount 1 1K 1K 78643K 1 0 log 0 0K 0K 78643K 4 0 vnodes 1279 80K 80K 78643K 3247 0 UFS quota 1 32K 32K 78643K 1 0 UFS mount 5 36K 36K 78643K 5 0 shm 2 1K 9K 78643K 224 0 VM map 2 1K 1K 78643K 2 0 sem 12 0K 0K 78643K 1524 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1697 195K 286K 78643K 12548 0 file desc 22 81K 113K 78643K 15376 0 sigio 0 0K 0K 78643K 222 0 proc 59 91K 103K 78643K 1839 0 subproc 104 6K 6K 78643K 351 0 NFS srvsock 1 0K 0K 78643K 1 0 NFS daemon 1 16K 16K 78643K 1 0 ip_moptions 0 0K 0K 78643K 8350 0 in_multi 99 7K 7K 78643K 432 0 ether_multi 1 0K 0K 78643K 19 0 mrt 1 0K 0K 78643K 1 0 ISOFS mount 1 32K 32K 78643K 1 0 MSDOSFS mount 1 16K 16K 78643K 1 0 ttys 169 758K 758K 78643K 169 0 exec 0 0K 1K 78643K 2577 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 455 93K 106K 78643K 152351 0 UVM aobj 131 6K 6K 78643K 158 0 memdesc 1 4K 4K 78643K 1 0 crypto data 1 1K 1K 78643K 1 0 ip6_options 7 0K 1K 78643K 2743 0 NDP 11 0K 2K 78643K 84 0 temp 74 5920K 6000K 78643K 39740 0 kqueue 12 18K 34K 78643K 1444 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 120 789 0 786 10 9 1 3 0 8 0 rtentry 112 344 0 228 4 0 4 4 0 8 0 unpcb 144 8175 0 8162 81 78 3 8 0 8 2 syncache 304 159 0 159 25 24 1 1 0 8 1 sackhl 24 1 0 1 1 1 0 1 0 8 0 tcpqe 32 561 0 561 22 22 0 2 0 8 0 tcpcb 808 22497 0 22462 291 280 11 29 0 8 7 arp 120 58 0 39 1 0 1 1 0 8 0 ipq 40 41 0 40 9 8 1 1 0 8 0 ipqe 40 363 0 360 9 8 1 1 0 8 0 inpcb 368 28231 0 28193 292 281 11 23 0 8 7 nd6 136 103 0 74 4 2 2 2 0 8 0 kcovpl 48 27 0 19 1 0 1 1 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 1339 0 872 32 2 30 30 0 8 0 art_table 32 1340 0 872 4 0 4 4 0 8 0 art_node 16 343 0 237 1 0 1 1 0 8 0 sysvmsgpl 40 30 0 10 1 0 1 1 0 8 0 semapl 112 1522 0 1512 1 0 1 1 0 8 0 shmpl 112 155 0 27 4 0 4 4 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 20351 0 18876 93 0 93 93 0 8 0 ffsino 272 20351 0 18876 99 0 99 99 0 8 0 nchpl 144 40796 0 39154 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 125468 0 125467 8 7 1 2 0 8 0 percpumem 16 62 0 19 1 0 1 1 0 8 0 kstatmem 264 60 0 38 2 0 2 2 0 8 0 scxspl 216 134045 0 134045 54 52 2 8 1 8 2 plimitpl 152 2489 0 2465 20 19 1 2 0 8 0 sigapl 424 15623 0 15572 7 0 7 7 0 8 0 futexpl 64 125730 0 125729 4 3 1 1 0 8 0 knotepl 120 1171 0 0 17 0 17 17 0 8 0 kqueuepl 216 3275 0 3267 63 62 1 5 0 8 0 pipepl 320 3641 0 3613 97 89 8 13 0 8 5 fdescpl 496 15605 0 15572 7 2 5 6 0 8 0 filepl 152 99036 0 98793 145 128 17 19 0 8 7 lockfpl 104 3153 0 3151 4 3 1 2 0 8 0 lockfspl 48 830 0 828 1 0 1 1 0 8 0 sessionpl 144 42 0 26 1 0 1 1 0 8 0 pgrppl 48 390 0 374 1 0 1 1 0 8 0 ucredpl 104 10938 0 10920 1 0 1 1 0 8 0 zombiepl 144 15573 0 15572 1 0 1 1 0 8 0 processpl 1072 15623 0 15572 4 0 4 4 0 8 0 procpl 680 42940 0 42871 28 21 7 8 0 8 0 sosppl 168 273 0 273 20 19 1 1 0 8 1 sockpl 488 37916 0 37862 619 603 16 34 0 8 8 mcl64k 65536 25 0 0 3 0 3 3 0 8 0 mcl16k 16384 89 0 0 10 5 5 10 0 8 0 mcl12k 12288 17 0 0 2 0 2 2 0 8 0 mcl9k 9216 17 0 0 2 0 2 2 0 8 0 mcl8k 8192 34 0 0 5 2 3 3 0 8 0 mcl4k 4096 65 0 0 4 0 4 4 0 8 0 mcl2k2 2112 12 0 0 1 0 1 1 0 8 0 mcl2k 2048 363 0 0 33 15 18 33 0 8 0 mtagpl 96 6 0 0 1 0 1 1 0 8 0 mbufpl 256 1584 0 0 61 0 61 61 0 8 0 bufpl 288 31007 0 24683 453 0 453 453 0 8 0 anonpl 24 1609190 0 1597927 230 136 94 100 0 186 0 amapchunkpl 152 480653 0 479833 122 84 38 48 0 158 0 amappl16 200 37395 0 37126 199 180 19 29 0 8 0 amappl15 192 14 0 14 1 1 0 1 0 8 0 amappl14 184 217 0 204 2 1 1 2 0 8 0 amappl13 176 25 0 24 2 1 1 1 0 8 0 amappl12 168 16524 0 16487 2 0 2 2 0 8 0 amappl11 160 60 0 49 1 0 1 1 0 8 0 amappl10 152 48 0 36 2 1 1 1 0 8 0 amappl9 144 284 0 284 15 14 1 1 0 8 1 amappl8 136 959 0 738 8 0 8 8 0 8 0 amappl7 128 147 0 133 2 0 2 2 0 8 0 amappl6 120 507 0 480 2 1 1 2 0 8 0 amappl5 112 553 0 545 1 0 1 1 0 8 0 amappl4 104 996 0 951 3 1 2 3 0 8 0 amappl3 96 94684 0 94601 14 11 3 4 0 8 0 amappl2 88 16602 0 16526 3 1 2 3 0 8 0 amappl1 80 63302 0 62779 23 11 12 22 0 8 0 amappl 88 151107 0 150863 7 0 7 7 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 72 157 0 27 3 0 3 3 0 8 0 uaddrrnd 24 15605 0 15572 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 15605 0 15572 1 0 1 1 0 8 0 vmmpekpl 168 125246 0 125186 5 1 4 4 0 8 0 vmmpepl 168 908656 0 906247 282 164 118 135 0 357 0 vmsppl 464 15604 0 15572 7 2 5 6 0 8 0 rwobjpl 56 233148 0 225663 119 9 110 110 0 8 0 pdppl 4096 31217 0 31144 489 408 81 89 0 8 8 pvpl 32 4474357 0 4457027 571 403 168 352 0 265 0 pmappl 248 15604 0 15572 4 1 3 3 0 8 0 extentpl 40 56 0 38 1 0 1 1 0 8 0 phpool 112 1908 0 1023 27 0 27 27 0 8 0 ddb{0}> machine ddbcpu 0 Invalid cpu 0 ddb{0}> trace witness_checkorder(fffffd806f0fb298,9,0) at witness_checkorder+0x1ec sys/kern/subr_witness.c:794 mtx_enter(fffffd806f0fb288) at mtx_enter+0x3e sys/kern/kern_lock.c:265 knote_remove(ffff800021274010,fffffd806f0fb288,fffffd806f0fb310,0,0) at knote_remove+0x20d sys/kern/kern_event.c:1881 knote_fdclose(ffff800021274010,0) at knote_fdclose+0xae sys/kern/kern_event.c:1934 fdfree(ffff800021274010) at fdfree+0xdf sys/kern/kern_descrip.c:1196 exit1(ffff800021274010,0,0,1) at exit1+0x3e4 sys/kern/kern_exit.c:206 sys_exit(ffff800021274010,ffff800022cdb990,ffff800022cdb9e0) at sys_exit+0x1a sys/kern/kern_exit.c:89 syscall(ffff800022cdba60) at syscall+0x5e2 mi_syscall sys/sys/syscall_mi.h:110 [inline] syscall(ffff800022cdba60) at syscall+0x5e2 sys/arch/amd64/amd64/trap.c:623 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x73c1d37210e0, count: -9 ddb{0}> machine ddbcpu 1 Stopped at x86_ipi_db+0x1e: addq $0x8,%rsp x86_ipi_db(ffff800020d58ff0) 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(ffffffff82c85668) at __mp_lock+0x122 __mp_lock_spin sys/kern/kern_lock.c:116 [inline] __mp_lock(ffffffff82c85668) at __mp_lock+0x122 sys/kern/kern_lock.c:147 reaper(ffff8000211b2ff8) at reaper+0x160 sys/kern/kern_exit.c:454 end trace frame: 0x0, count: 10 ddb{1}> trace x86_ipi_db(ffff800020d58ff0) 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(ffffffff82c85668) at __mp_lock+0x122 __mp_lock_spin sys/kern/kern_lock.c:116 [inline] __mp_lock(ffffffff82c85668) at __mp_lock+0x122 sys/kern/kern_lock.c:147 reaper(ffff8000211b2ff8) at reaper+0x160 sys/kern/kern_exit.c:454 end trace frame: 0x0, count: -5