panic: Caught invalid memory access at ffff800001b52ce2 size 2 op 0 Stopped at db_enter+0x17: popq %rbp TID PID UID PRFLAGS PFLAGS CPU COMMAND *310048 98971 0 0 0x4000000 0K syz-executor 153068 96198 0 0 0x4000001 1 syz-executor db_enter() at db_enter+0x17 sys/arch/amd64/amd64/db_interface.c:457 panic(ffffffff8463e8d1) at panic+0x270 sys/kern/subr_prf.c:198 __asan_load2_noabort(ffff800001b52ce2) at __asan_load2_noabort+0x107 knote_processfork(ffffffff85cbc640,a98) at knote_processfork+0x603 sys/kern/kern_event.c:2289 fork1(ffffffff85cbc2e0,f0,ffffffff814921c0,0,0,ffff80003bb7b660) at fork1+0x1225 sys/kern/kern_fork.c:511 kthread_create(ffffffff814921c0,0,ffffffff854413a0,ffffffff846dd6a0) at kthread_create+0xa8 sys/kern/kern_kthread.c:61 sys_acct(ffff80003bcc2568,ffff80003bb7ba30,ffff80003bb7b9a0) at sys_acct+0x35e acct_start sys/kern/kern_acct.c:300 [inline] sys_acct(ffff80003bcc2568,ffff80003bb7ba30,ffff80003bb7b9a0) at sys_acct+0x35e sys/kern/kern_acct.c:151 syscall(ffff80003bb7ba30) at syscall+0x1089 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003bb7ba30) at syscall+0x1089 sys/arch/amd64/amd64/trap.c:791 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x3be8938cb90, 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: Caught invalid memory access at ffff800001b52ce2 size 2 op 0 ddb{0}> show kasan KASAN: invalid read of 2 bytes at 0xffff800001b52ce2 from pc 0xffffffff82117a83 KASAN: first bad byte at 0xffff800001b52ce2 (+0); shadow 0xfd: pool use-after-free (or unallocated item) KASAN: 0xffff800001b52ce2 is 50 bytes inside the 120-byte item [0xffff800001b52cb0..0xffff800001b52d28) in pool 'knotepl' KASAN: allocated at: #0 pool_get+0x770 sys/kern/subr_pool.c:834 #1 kqueue_register+0x2f2 sys/kern/kern_event.c:1431 #2 sys_kevent+0x409 sys/kern/kern_event.c:1301 #3 syscall+0x1089 mi_syscall sys/sys/syscall_mi.h:176 [inline] #3 syscall+0x1089 sys/arch/amd64/amd64/trap.c:791 #4 Xsyscall+0x128 KASAN: freed at: #0 pool_put+0x79 sys/kern/subr_pool.c:1019 #1 kqueue_scan+0x1191 sys/kern/kern_event.c:1797 #2 sys_kevent+0x997 sys/kern/kern_event.c:1336 #3 syscall+0x1089 mi_syscall sys/sys/syscall_mi.h:176 [inline] #3 syscall+0x1089 sys/arch/amd64/amd64/trap.c:791 #4 Xsyscall+0x128 KASAN: pc: knote_processfork+0x603 KASAN: call trace: #0 __asan_load2_noabort+0xe6 kasan_shadow_check sys/kern/subr_kasan.c:-1 [inline] #0 __asan_load2_noabort+0xe6 sys/kern/subr_kasan.c:1097 #1 knote_processfork+0x603 sys/kern/kern_event.c:2289 #2 fork1+0x1225 sys/kern/kern_fork.c:511 #3 kthread_create+0xa8 sys/kern/kern_kthread.c:61 #4 sys_acct+0x35e acct_start sys/kern/kern_acct.c:300 [inline] #4 sys_acct+0x35e sys/kern/kern_acct.c:151 #5 syscall+0x1089 mi_syscall sys/sys/syscall_mi.h:176 [inline] #5 syscall+0x1089 sys/arch/amd64/amd64/trap.c:791 #6 Xsyscall+0x128 KASAN: shadow of 0xffff800001b52b80..0xffff800001b52e00 (1 cell = 8 bytes): 0xffff800001b52b80: 08 08 08 08 08 08 08 08 08 08 08 08 08 08 08 08 0xffff800001b52c00: 08 08 08 08 08 08 08 08 08 08 08 08 08 08 08 08 >0xffff800001b52c80: 08 08 08 08 08 08 fd fd fd fd fd fd[fd]fd fd fd 0xffff800001b52d00: fd fd fd fd fd fd fd fd fd fd fd fd fd fd fd fd 0xffff800001b52d80: fd fd fd fd fd fd fd fd fd fd fd fd fd fd fd fd KASAN: legend: 00 valid; 01..07 partial; fb malloc redzone; fc malloc freed; fd pool freed; fe kmem; fa global; f1..f4/f8 stack/scope ddb{0}> trace db_enter() at db_enter+0x17 sys/arch/amd64/amd64/db_interface.c:457 panic(ffffffff8463e8d1) at panic+0x270 sys/kern/subr_prf.c:198 __asan_load2_noabort(ffff800001b52ce2) at __asan_load2_noabort+0x107 knote_processfork(ffffffff85cbc640,a98) at knote_processfork+0x603 sys/kern/kern_event.c:2289 fork1(ffffffff85cbc2e0,f0,ffffffff814921c0,0,0,ffff80003bb7b660) at fork1+0x1225 sys/kern/kern_fork.c:511 kthread_create(ffffffff814921c0,0,ffffffff854413a0,ffffffff846dd6a0) at kthread_create+0xa8 sys/kern/kern_kthread.c:61 sys_acct(ffff80003bcc2568,ffff80003bb7ba30,ffff80003bb7b9a0) at sys_acct+0x35e acct_start sys/kern/kern_acct.c:300 [inline] sys_acct(ffff80003bcc2568,ffff80003bb7ba30,ffff80003bb7b9a0) at sys_acct+0x35e sys/kern/kern_acct.c:151 syscall(ffff80003bb7ba30) at syscall+0x1089 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003bb7ba30) at syscall+0x1089 sys/arch/amd64/amd64/trap.c:791 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x3be8938cb90, count: -9 ddb{0}> show registers rdi 0 rsi 0x1 rbp 0xffff80003bb7b210 rbx 0xffff80003bb7b280 rdx 0 rcx 0xffffffff85103ff0 cpu_info_full_primary+0x1ff0 rax 0 r8 0x101010101010101 r9 0x8080808080808080 r10 0xffff80003bb7aff8 r11 0xffffffff81a9ac60 x86_bus_space_io_read_1 r12 0xffffffff8463e8d1 .str.5+0x9b131 r13 0xffffffff85104c10 cpu_info_full_primary+0x2c10 r14 0xffffffff85104e0f cpu_info_full_primary+0x2e0f r15 0x1 rip 0xffffffff82f99727 db_enter+0x17 cs 0x8 rflags 0x246 rsp 0xffff80003bb7b210 ss 0x10 db_enter+0x17: popq %rbp ddb{0}> show proc PROC (syz-executor) tid=310048 pid=98971 tcnt=3 stat=onproc flags process=0 proc=4000000 runpri=50, usrpri=86, slppri=16, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff80003bcc2d30,0xffff8000298f4d18 process=0xffff80003bcc7048 user=0xffff80003bb70000, vmspace=0xffff800001c843f0 estcpu=36, cpticks=19, pctcpu=0.0, user=0, sys=19, intr=0 ddb{0}> ps PID TID PPID UID S PRLAGS PFLAGS WAIT COMMAND 2712 376412 0 0 2 0x14000 0x200 swapper 85539 362614 98349 0 2 0 0 syz-executor 85539 142847 98349 0 2 0 0x4000000 syz-executor 79428 199523 24361 0 2 0 0 syz-executor 79428 57088 24361 0 3 0 0x4000080 fsleep syz-executor 78884 62448 75626 0 2 0 0xc80 syz-executor 78884 103448 75626 0 3 0 0x4000080 fsleep syz-executor 78884 250035 75626 0 3 0 0x4000080 fsleep syz-executor 78884 508508 75626 0 3 0 0x4000080 fsleep syz-executor 78884 458502 75626 0 3 0 0x4000080 fsleep syz-executor 98971 251926 48802 0 2 0 0 syz-executor 98971 215025 48802 0 3 0 0x4000080 fsleep syz-executor *98971 310048 48802 0 7 0 0x4000000 syz-executor 2068 185975 31759 0 2 0 0 syz-executor 2068 194501 31759 0 3 0 0x4000080 sbwait syz-executor 95868 358631 559 0 2 0 0 syz-executor 65267 468907 70354 0 2 0x2 0 syz-executor 96198 208974 68020 0 2 0 0xc80 syz-executor 96198 153068 68020 0 7 0 0x4000001 syz-executor 96198 519079 68020 0 3 0 0x4000080 fsleep syz-executor 61189 423514 0 0 3 0x14000 0x280 nfsidl nfsio 93506 491498 0 0 3 0x14000 0x280 nfsidl nfsio 83366 383865 0 0 3 0x14000 0x280 nfsidl nfsio 65688 246168 0 0 3 0x14000 0x280 nfsidl nfsio 49279 367268 0 0 3 0x14000 0x280 nfsidl nfsio 50899 510498 0 0 3 0x14000 0x280 nfsidl nfsio 34723 117007 0 0 3 0x14000 0x280 nfsidl nfsio 59960 295889 0 0 3 0x14000 0x280 nfsidl nfsio 84554 474833 0 0 3 0x14000 0x280 nfsidl nfsio 23155 370476 0 0 3 0x14000 0x280 nfsidl nfsio 3047 419302 0 0 3 0x14000 0x280 nfsidl nfsio 84393 176250 0 0 3 0x14000 0x280 nfsidl nfsio 32890 177354 0 0 3 0x14000 0x280 nfsidl nfsio 25447 334585 0 0 3 0x14000 0x280 nfsidl nfsio 86437 436638 0 0 3 0x14000 0x280 nfsidl nfsio 65461 204914 0 0 3 0x14000 0x280 nfsidl nfsio 8380 425566 0 0 3 0x14000 0x280 nfsidl nfsio 85477 377212 0 0 3 0x14000 0x280 nfsidl nfsio 39107 209413 0 0 3 0x14000 0x280 nfsidl nfsio 14630 405641 0 0 3 0x14000 0x280 nfsidl nfsio 48802 480176 70354 0 2 0x2 0 syz-executor 98349 59897 70354 0 2 0x2 0xc80 syz-executor 24361 468172 70354 0 2 0x2 0xc80 syz-executor 75626 88443 70354 0 2 0x2 0xc80 syz-executor 68020 433341 70354 0 2 0x2 0xc80 syz-executor 31759 467630 70354 0 2 0x2 0xc80 syz-executor 559 75823 70354 0 2 0x2 0 syz-executor 70354 116918 7172 0 3 0x2 0x80 kqread syz-executor 7172 237973 69207 0 3 0x100002 0x88 sigsusp ksh 69207 18433 38720 0 3 0x10 0x88 kqread sshd-session 38720 473472 14577 0 3 0x12 0x80 kqread sshd-session 77253 20565 1 0 3 0x100003 0x80 ttyin getty 14577 492772 1 0 3 0 0x88 kqread sshd 7337 34686 74369 74 3 0x1100012 0x80 bpf pflogd 74369 338287 1 0 3 0 0x80 sbwait pflogd 50951 227700 95126 73 2 0x1100010 0x80 syslogd 95126 181152 1 0 3 0x100002 0x80 sbwait syslogd 82715 15328 1 0 3 0x100000 0x80 kqread resolvd 64279 223723 26012 77 3 0x100012 0x80 kqread dhcpleased 52417 122209 26012 77 3 0x100012 0x80 kqread dhcpleased 26012 427134 1 0 3 0 0x80 kqread dhcpleased 82492 327292 0 0 2 0x14000 0x200 smr 27621 267189 0 0 2 0x14000 0x200 zerothread 50469 524247 0 0 3 0x14000 0x200 aiodoned aiodoned 11059 115536 0 0 3 0x14000 0x200 syncer update 61258 401129 0 0 3 0x14000 0x200 cleaner cleaner 64854 259637 0 0 3 0x14000 0x200 reaper reaper 29221 114147 0 0 3 0x14000 0x200 pgdaemon pagedaemon 40913 497637 0 0 3 0x14000 0x200 bored viomb 71530 62688 0 0 3 0x14000 0x40000200 acpi0 acpi0 66289 210007 0 0 3 0x14000 0x40000200 idle1 42836 192126 0 0 3 0x14000 0x200 bored softnet1 47826 80759 0 0 3 0x14000 0x200 bored softnet0 63637 104070 0 0 3 0x14000 0x200 smrbar systqmp 9990 469998 0 0 3 0x14000 0x200 bored systq 95799 200057 0 0 2 0x14000 0x200 softclockmp 31106 273672 0 0 3 0x14000 0x40000200 tmoslp softclock 36865 97252 0 0 3 0x14000 0x40000200 idle0 1 208984 0 0 3 0x2 0x80 wait init 0 0 -1 0 3 0x10000 0x200 scheduler swapper ddb{0}> show all locks Process 98971 (syz-executor) thread 0xffff80003bcc2568 (310048) Process 63637 (systqmp) thread 0xffff800045ffe530 (104070) ddb{0}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 11061 12316K 12391K 166960K 12191 0 pcb 17 24K 24K 166960K 27 0 rtable 215 11K 13K 166960K 351 0 pf 35 22K 22K 166960K 48 0 ifaddr 40 11K 12K 166960K 46 0 ifgroup 56 2K 2K 166960K 60 0 sysctl 3 1K 13K 166960K 8 0 counters 70 42K 42K 166960K 72 0 ioctlops 0 0K 4K 166960K 1491 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1300 84K 84K 166960K 1413 0 UFS quota 1 36K 36K 166960K 1 0 UFS mount 5 44K 44K 166960K 5 0 shm 2 2K 6K 166960K 3 0 VM map 2 1K 1K 166960K 2 0 sem 4 0K 0K 166960K 5 0 dirhash 12 2K 2K 166960K 12 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 17 61K 97K 166960K 179 0 proc 70 128K 177K 166960K 567 0 subproc 65 8K 9K 166960K 74 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 20K 20K 166960K 1 0 ip_moptions 0 0K 0K 166960K 2 0 in_multi 88 6K 7K 166960K 99 0 ether_multi 1 0K 0K 166960K 1 0 mrt 0 0K 0K 166960K 5 0 ISOFS mount 1 36K 36K 166960K 1 0 MSDOSFS mount 1 20K 20K 166960K 1 0 ttys 67 465K 465K 166960K 67 0 exec 0 0K 2K 166960K 418 0 fusefs mount 1 36K 36K 166960K 1 0 tdb 3 1K 1K 166960K 3 0 VM swap 14 124K 124K 166960K 15 0 UVM amap 227 232K 257K 166960K 3536 0 UVM aobj 5 4K 4K 166960K 6 0 pinsyscall 1066 1732K 1732K 166960K 1338 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 2 0 NDP 12 0K 2K 166960K 29 0 temp 33 9166K 9194K 166960K 4080 0 kqueue 15 45K 53K 166960K 34 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 28 0 0 1 0 1 1 0 8 0 rtpcb 120 34 0 31 1 0 1 1 0 8 0 rtentry 176 111 0 12 5 0 5 5 0 8 0 unpcb 144 131 0 109 4 2 2 4 0 8 1 syncache 336 4 0 4 2 2 0 1 0 8 0 tcpcb 736 11 0 7 1 0 1 1 0 8 0 arp 136 18 0 2 1 0 1 1 0 8 0 inpcb 328 96 0 88 2 0 2 2 0 8 1 nd6 152 24 0 3 1 0 1 1 0 8 0 kcovpl 48 8 0 1 1 0 1 1 0 8 0 pffrag 232 2 0 1 1 0 1 1 0 482 0 pffrnode 88 2 0 1 1 0 1 1 0 8 0 pffrent 40 3 0 2 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 34 0 0 1 0 1 1 0 8 0 pfstkey 128 34 0 0 2 0 2 2 0 8 0 pfstate 448 34 0 0 4 0 4 4 0 8 0 pfrule 1360 22 0 17 2 1 1 2 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 452 0 0 29 0 29 29 0 8 0 art_table 40 453 0 0 5 0 5 5 0 8 0 art_node 32 111 0 12 1 0 1 1 0 8 0 semapl 72 3 0 1 1 0 1 1 0 8 0 shmpl 112 3 0 1 1 0 1 1 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 1642 0 174 92 0 92 92 0 8 0 ffsino 296 1642 0 174 114 0 114 114 0 8 0 nchpl 144 1893 0 191 64 0 64 64 0 8 0 vnodes 216 1758 0 0 98 0 98 98 0 8 0 namei 1024 6678 0 6678 3 2 1 2 0 8 1 percpumem 16 52 0 1 1 0 1 1 0 8 0 kstatmem 264 29 0 2 2 0 2 2 0 8 0 scxspl 216 6975 0 6975 4 3 1 3 1 8 1 plimitpl 152 37 0 20 1 0 1 1 0 8 0 sigapl 424 516 0 448 8 0 8 8 0 8 0 knotepl 120 93 0 0 3 0 3 3 0 8 0 kqueuepl 224 38 0 25 1 0 1 1 0 8 0 pipepl 344 137 0 110 3 0 3 3 0 8 0 fdescpl 528 479 0 448 3 0 3 3 0 8 0 filepl 160 1901 0 1683 13 3 10 13 0 8 0 lockfpl 104 19 0 16 1 0 1 1 0 8 0 lockfspl 48 11 0 8 1 0 1 1 0 8 0 sessionpl 144 24 0 15 1 0 1 1 0 8 0 pgrppl 48 33 0 16 1 0 1 1 0 8 0 ucredpl 104 221 0 208 1 0 1 1 0 8 0 zombiepl 144 448 0 448 2 1 1 1 0 8 1 processpl 1232 516 0 448 6 0 6 6 0 8 0 procpl 664 597 0 518 8 0 8 8 0 8 1 sockpl 752 261 0 228 10 5 5 10 0 8 1 mcl64k 65536 2 0 0 1 0 1 1 0 8 0 mcl12k 12288 1 0 0 1 0 1 1 0 8 0 mcl8k 8192 3 0 0 1 0 1 1 0 8 0 mcl4k 4096 128 0 0 16 0 16 16 0 8 0 mcl2k 2048 17 0 0 3 0 3 3 0 8 0 mextrefs 64 17 0 0 1 0 1 1 0 8 0 mtagpl 96 3 0 0 1 0 1 1 0 8 0 mbufpl 256 172 0 0 11 0 11 11 0 8 0 bufpl 272 2364 0 106 151 0 151 151 0 8 0 anonpl 32 3906 0 0 32 0 32 32 0 222 0 amapchunkpl 152 9794 0 9321 22 0 22 22 0 158 3 amappl16 200 2077 0 2057 7 4 3 5 0 8 1 amappl15 192 6 0 6 2 2 0 1 0 8 0 amappl14 184 449 0 448 1 0 1 1 0 8 0 amappl13 176 123 0 111 1 0 1 1 0 8 0 amappl12 168 733 0 704 2 0 2 2 0 8 0 amappl11 160 8 0 8 1 1 0 1 0 8 0 amappl10 152 79 0 65 1 0 1 1 0 8 0 amappl9 144 275 0 275 1 1 0 1 0 8 0 amappl8 136 96 0 94 1 0 1 1 0 8 0 amappl7 128 149 0 136 1 0 1 1 0 8 0 amappl6 120 157 0 156 1 0 1 1 0 8 0 amappl5 112 101 0 91 1 0 1 1 0 8 0 amappl4 104 299 0 277 1 0 1 1 0 8 0 amappl3 96 1649 0 1555 3 0 3 3 0 8 0 amappl2 88 589 0 514 2 0 2 2 0 8 0 amappl1 80 10602 0 9999 16 1 15 15 0 8 2 amappl 88 2810 0 2653 5 0 5 5 0 92 0 uvmvnodes 80 99 0 0 3 0 3 3 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 128 253 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 5 0 1 1 0 1 1 0 8 0 uaddrrnd 24 479 0 448 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 479 0 448 1 0 1 1 0 8 0 vmmpekpl 168 5971 0 5930 3 0 3 3 0 8 0 vmmpepl 168 40414 0 38523 90 2 88 88 0 357 5 vmsppl 488 478 0 448 5 0 5 5 0 8 1 rwobjpl 80 15283 0 14271 25 2 23 25 0 8 0 pdppl 4096 966 0 896 104 32 72 88 0 8 2 pvpl 32 11555 0 0 94 0 94 94 0 265 0 pmappl 256 478 0 448 3 0 3 3 0 8 0 extentpl 40 46 0 28 1 0 1 1 0 8 0 phpool 120 430 0 39 13 0 13 13 0 8 0 ddb{0}> machine ddbcpu 0 Invalid cpu 0 ddb{0}> trace db_enter() at db_enter+0x17 sys/arch/amd64/amd64/db_interface.c:457 panic(ffffffff8463e8d1) at panic+0x270 sys/kern/subr_prf.c:198 __asan_load2_noabort(ffff800001b52ce2) at __asan_load2_noabort+0x107 knote_processfork(ffffffff85cbc640,a98) at knote_processfork+0x603 sys/kern/kern_event.c:2289 fork1(ffffffff85cbc2e0,f0,ffffffff814921c0,0,0,ffff80003bb7b660) at fork1+0x1225 sys/kern/kern_fork.c:511 kthread_create(ffffffff814921c0,0,ffffffff854413a0,ffffffff846dd6a0) at kthread_create+0xa8 sys/kern/kern_kthread.c:61 sys_acct(ffff80003bcc2568,ffff80003bb7ba30,ffff80003bb7b9a0) at sys_acct+0x35e acct_start sys/kern/kern_acct.c:300 [inline] sys_acct(ffff80003bcc2568,ffff80003bb7ba30,ffff80003bb7b9a0) at sys_acct+0x35e sys/kern/kern_acct.c:151 syscall(ffff80003bb7ba30) at syscall+0x1089 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003bb7ba30) at syscall+0x1089 sys/arch/amd64/amd64/trap.c:791 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x3be8938cb90, count: -9 ddb{0}> machine ddbcpu 1 Stopped at x86_ipi_db+0x19: leave x86_ipi_db(ffff800028fe3ff0) at x86_ipi_db+0x19 sys/arch/amd64/amd64/db_interface.c:412 x86_ipi_handler() at x86_ipi_handler+0x112 sys/arch/amd64/amd64/ipi.c:106 Xresume_lapic_ipi() at Xresume_lapic_ipi+0x27 __mp_lock(ffffffff85d6bec0) at __mp_lock+0x272 __mp_lock_spin sys/kern/kern_lock.c:142 [inline] __mp_lock(ffffffff85d6bec0) at __mp_lock+0x272 sys/kern/kern_lock.c:173 ktrstruct(ffff80003bcc2800,ffffffff848ed2e0,ffff80003a31f180,20) at ktrstruct+0x13f sys/kern/kern_ktrace.c:314 sys_kevent(ffff80003bcc2800,ffff80003a31f4c0,ffff80003a31f420) at sys_kevent+0xacb sys/kern/kern_event.c:1343 syscall(ffff80003a31f4c0) at syscall+0x1089 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003a31f4c0) at syscall+0x1089 sys/arch/amd64/amd64/trap.c:791 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x52c14f70670, count: 7 ddb{1}> trace x86_ipi_db(ffff800028fe3ff0) at x86_ipi_db+0x19 sys/arch/amd64/amd64/db_interface.c:412 x86_ipi_handler() at x86_ipi_handler+0x112 sys/arch/amd64/amd64/ipi.c:106 Xresume_lapic_ipi() at Xresume_lapic_ipi+0x27 __mp_lock(ffffffff85d6bec0) at __mp_lock+0x272 __mp_lock_spin sys/kern/kern_lock.c:142 [inline] __mp_lock(ffffffff85d6bec0) at __mp_lock+0x272 sys/kern/kern_lock.c:173 ktrstruct(ffff80003bcc2800,ffffffff848ed2e0,ffff80003a31f180,20) at ktrstruct+0x13f sys/kern/kern_ktrace.c:314 sys_kevent(ffff80003bcc2800,ffff80003a31f4c0,ffff80003a31f420) at sys_kevent+0xacb sys/kern/kern_event.c:1343 syscall(ffff80003a31f4c0) at syscall+0x1089 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003a31f4c0) at syscall+0x1089 sys/arch/amd64/amd64/trap.c:791 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x52c14f70670, count: -8