panic: kernel diagnostic assertion "curproc->p_kd == NULL" failed: file "/syzkaller/managers/multicore/kernel/sys/dev/kcov.c", line 519 Stopped at db_enter+0x18: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND 436773 67176 0 0x2 0x4000000 1 syz-fuzzer *220442 34018 0 0x14000 0x200 0 softnet db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:398 panic(ffffffff823c5d16) at panic+0x15e sys/kern/subr_prf.c:218 __assert(ffffffff8242e558,ffffffff82428da8,207,ffffffff823ce69c) at __assert+0x2b sys/kern/subr_prf.c:162 kcov_remote_enter(0,ffff800020e00010) at kcov_remote_enter+0x155 sys/dev/kcov.c:519 taskq_thread(ffff80000002c000) at taskq_thread+0xd9 sys/kern/kern_task.c:447 end trace frame: 0x0, count: 10 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 kernel diagnostic assertion "curproc->p_kd == NULL" failed: file "/syzkaller/managers/multicore/kernel/sys/dev/kcov.c", line 519 ddb{0}> trace db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:398 panic(ffffffff823c5d16) at panic+0x15e sys/kern/subr_prf.c:218 __assert(ffffffff8242e558,ffffffff82428da8,207,ffffffff823ce69c) at __assert+0x2b sys/kern/subr_prf.c:162 kcov_remote_enter(0,ffff800020e00010) at kcov_remote_enter+0x155 sys/dev/kcov.c:519 taskq_thread(ffff80000002c000) at taskq_thread+0xd9 sys/kern/kern_task.c:447 end trace frame: 0x0, count: -5 ddb{0}> show registers rdi 0 rsi 0x1 rbp 0xffff800020db9370 rbx 0xffff800020db9380 rdx 0x8b rcx 0x2 rax 0x1 r8 0xffff800020db9330 r9 0xffffffff82281826 kprintf+0x146 r10 0x1 r11 0x39a124a08fb7e073 r12 0x3000000008 r13 0xffff800020db9420 r14 0x100 r15 0x1 rip 0xffffffff810d1058 db_enter+0x18 cs 0x8 rflags 0x246 rsp 0xffff800020db9360 ss 0x10 db_enter+0x18: addq $0x8,%rsp ddb{0}> show proc PROC (softnet) pid=220442 stat=onproc flags process=14000 proc=200 pri=32, usrpri=50, nice=20 forw=0xffffffffffffffff, list=0xffff800020d98000,0xffff800020d98500 process=0xffff800020d9abd0 user=0xffff800020db4000, vmspace=0xffffffff828dd1d0 estcpu=0, cpticks=2, pctcpu=0.0 user=0, sys=1, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND 35739 503501 0 0 3 0x14280 nfsidl nfsio 99807 225870 0 0 3 0x14280 nfsidl nfsio 37289 63215 0 0 3 0x14280 nfsidl nfsio 49705 444554 0 0 3 0x14280 nfsidl nfsio 31266 418317 0 0 3 0x14280 nfsidl nfsio 77117 498501 0 0 3 0x14280 nfsidl nfsio 20481 319844 0 0 3 0x14280 nfsidl nfsio 50220 384544 0 0 3 0x14280 nfsidl nfsio 56786 405662 0 0 3 0x14280 nfsidl nfsio 29131 516516 0 0 3 0x14280 nfsidl nfsio 67175 516082 0 0 3 0x14280 nfsidl nfsio 33841 173598 0 0 3 0x14280 nfsidl nfsio 61643 519087 0 0 3 0x14280 nfsidl nfsio 24369 161016 0 0 3 0x14280 nfsidl nfsio 50004 479732 0 0 3 0x14280 nfsidl nfsio 65371 312994 0 0 3 0x14280 nfsidl nfsio 40515 18060 0 0 3 0x14280 nfsidl nfsio 42031 63294 0 0 3 0x14280 nfsidl nfsio 13745 279611 0 0 3 0x14280 nfsidl nfsio 91429 149805 0 0 3 0x14280 nfsidl nfsio 14611 13136 1 0 3 0x100083 ttyin getty 4213 295589 0 0 3 0x14200 bored sosplice 29931 222711 67176 0 3 0x2 biowait syz-executor.1 67176 218385 42612 0 3 0x82 thrsleep syz-fuzzer 67176 295035 42612 0 3 0x4000082 nanosleep syz-fuzzer 67176 298502 42612 0 3 0x4000082 thrsleep syz-fuzzer 67176 75798 42612 0 3 0x4000082 thrsleep syz-fuzzer 67176 82137 42612 0 3 0x4000082 thrsleep syz-fuzzer 67176 119485 42612 0 3 0x4000082 thrsleep syz-fuzzer 67176 149925 42612 0 3 0x4000082 thrsleep syz-fuzzer 67176 436773 42612 0 7 0x4000002 syz-fuzzer 42612 138292 44687 0 3 0x10008a pause ksh 44687 295798 20417 0 3 0x92 select sshd 20417 62940 1 0 3 0x80 select sshd 75219 188046 17950 74 3 0x100092 bpf pflogd 17950 339220 1 0 3 0x80 netio pflogd 19898 382516 70599 73 3 0x100090 kqread syslogd 70599 90017 1 0 3 0x100082 netio syslogd 8880 416429 1 77 3 0x100090 poll dhclient 96598 117557 1 0 3 0x80 poll dhclient 85843 302473 0 0 3 0x14200 bored smr 93090 320378 0 0 3 0x14200 pgzero zerothread 32614 117650 0 0 3 0x14200 aiodoned aiodoned 84810 328165 0 0 3 0x14200 syncer update 49878 66945 0 0 3 0x14200 cleaner cleaner 73150 115159 0 0 3 0x14200 reaper reaper 5368 439020 0 0 3 0x14200 pgdaemon pagedaemon 71554 261983 0 0 3 0x14200 bored crynlk 82955 70660 0 0 3 0x14200 bored crypto 58962 254914 0 0 3 0x40014200 acpi0 acpi0 32889 453822 0 0 3 0x40014200 idle1 *34018 220442 0 0 7 0x14200 softnet 78978 1712 0 0 3 0x14200 bored systqmp 78957 31809 0 0 3 0x14200 bored systq 80725 263291 0 0 3 0x40014200 bored softclock 40615 8407 0 0 3 0x40014200 idle0 1 184438 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{0}> show all locks CPU 0: exclusive mutex /syzkaller/managers/multicore/kernel/sys/dev/kcov.c:92 r = 0 (0xffffffff826cd048) #0 witness_lock+0x4b0 stacktrace_save sys/sys/stacktrace.h:36 [inline] #0 witness_lock+0x4b0 sys/kern/subr_witness.c:1164 #1 mtx_enter_try+0x100 #2 mtx_enter+0x4b sys/kern/kern_lock.c:266 #3 kcov_remote_enter+0x62 kr_lookup sys/dev/kcov.c:674 [inline] #3 kcov_remote_enter+0x62 sys/dev/kcov.c:513 #4 taskq_thread+0xd9 sys/kern/kern_task.c:447 #5 proc_trampoline+0x1c Process 29931 (syz-executor.1) thread 0xffff800020ea1b40 (222711) exclusive rrwlock inode r = 0 (0xfffffd807a0a8f80) #0 witness_lock+0x4b0 stacktrace_save sys/sys/stacktrace.h:36 [inline] #0 witness_lock+0x4b0 sys/kern/subr_witness.c:1164 #1 rw_enter+0x446 sys/kern/kern_rwlock.c:311 #2 rrw_enter+0x88 sys/kern/kern_rwlock.c:462 #3 VOP_LOCK+0x4b sys/kern/vfs_vops.c:603 #4 vn_lock+0x6c sys/kern/vfs_vnops.c:575 #5 vget+0x1c6 sys/kern/vfs_subr.c:671 #6 ufs_ihashget+0x121 sys/ufs/ufs/ufs_ihash.c:119 #7 ffs_vget+0x6b sys/ufs/ffs/ffs_vfsops.c:1321 #8 ufs_lookup+0x151d sys/ufs/ufs/ufs_lookup.c:487 #9 VOP_LOOKUP+0x5b sys/kern/vfs_vops.c:90 #10 vfs_lookup+0x708 sys/kern/vfs_lookup.c:568 #11 namei+0x5f7 sys/kern/vfs_lookup.c:249 #12 dounlinkat+0x99 sys/kern/vfs_syscalls.c:1853 #13 syscall+0x4a1 mi_syscall sys/sys/syscall_mi.h:102 [inline] #13 syscall+0x4a1 sys/arch/amd64/amd64/trap.c:570 #14 Xsyscall+0x128 exclusive rrwlock inode r = 0 (0xfffffd806c81a6f8) #0 witness_lock+0x4b0 stacktrace_save sys/sys/stacktrace.h:36 [inline] #0 witness_lock+0x4b0 sys/kern/subr_witness.c:1164 #1 rw_enter+0x446 sys/kern/kern_rwlock.c:311 #2 rrw_enter+0x88 sys/kern/kern_rwlock.c:462 #3 VOP_LOCK+0x4b sys/kern/vfs_vops.c:603 #4 vn_lock+0x6c sys/kern/vfs_vnops.c:575 #5 vfs_lookup+0xe6 sys/kern/vfs_lookup.c:419 #6 namei+0x5f7 sys/kern/vfs_lookup.c:249 #7 dounlinkat+0x99 sys/kern/vfs_syscalls.c:1853 #8 syscall+0x4a1 mi_syscall sys/sys/syscall_mi.h:102 [inline] #8 syscall+0x4a1 sys/arch/amd64/amd64/trap.c:570 #9 Xsyscall+0x128 Process 34018 (softnet) thread 0xffff800020d98278 (220442) shared rwlock softnet r = 0 (0xffff80000002c070) #0 witness_lock+0x4b0 stacktrace_save sys/sys/stacktrace.h:36 [inline] #0 witness_lock+0x4b0 sys/kern/subr_witness.c:1164 #1 taskq_thread+0xcb sys/kern/kern_task.c:445 #2 proc_trampoline+0x1c exclusive mutex /syzkaller/managers/multicore/kernel/sys/dev/kcov.c:92 r = 0 (0xffffffff826cd048) #0 witness_lock+0x4b0 stacktrace_save sys/sys/stacktrace.h:36 [inline] #0 witness_lock+0x4b0 sys/kern/subr_witness.c:1164 #1 mtx_enter_try+0x100 #2 mtx_enter+0x4b sys/kern/kern_lock.c:266 #3 kcov_remote_enter+0x62 kr_lookup sys/dev/kcov.c:674 [inline] #3 kcov_remote_enter+0x62 sys/dev/kcov.c:513 #4 taskq_thread+0xd9 sys/kern/kern_task.c:447 #5 proc_trampoline+0x1c ddb{0}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 9536 6456K 7398K 78643K 15099 0 pcb 13 8K 8K 78643K 241 0 rtable 99 5K 6K 78643K 789 0 ifaddr 81 15K 16K 78643K 248 0 counters 45 34K 34K 78643K 97 0 ioctlops 0 0K 4K 78643K 1641 0 iov 0 0K 28K 78643K 175 0 mount 1 1K 1K 78643K 1 0 vnodes 1218 77K 77K 78643K 2750 0 UFS quota 1 32K 32K 78643K 1 0 UFS mount 5 36K 36K 78643K 5 0 shm 2 1K 9K 78643K 52 0 VM map 2 1K 1K 78643K 2 0 sem 12 0K 1K 78643K 369 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1824 197K 290K 78643K 13058 0 file desc 4 9K 25K 78643K 3856 0 sigio 0 0K 0K 78643K 57 0 proc 64 63K 95K 78643K 635 0 subproc 32 2K 2K 78643K 51 0 NFS srvsock 1 0K 0K 78643K 1 0 NFS daemon 1 16K 16K 78643K 1 0 ip_moptions 0 0K 0K 78643K 303 0 in_multi 22 1K 2K 78643K 297 0 ether_multi 1 0K 0K 78643K 50 0 mrt 0 0K 0K 78643K 18 0 ISOFS mount 1 32K 32K 78643K 1 0 MSDOSFS mount 1 16K 16K 78643K 1 0 ttys 55 254K 254K 78643K 55 0 exec 0 0K 2K 78643K 482 0 pagedep 1 8K 8K 78643K 1 0 inodedep 1 32K 32K 78643K 1 0 newblk 1 0K 0K 78643K 1 0 VM swap 7 26K 26K 78643K 7 0 UVM amap 161 91K 94K 78643K 9701 0 UVM aobj 118 8K 8K 78643K 130 0 memdesc 1 4K 4K 78643K 1 0 crypto data 1 1K 1K 78643K 1 0 ip6_options 0 0K 0K 78643K 201 0 NDP 15 0K 0K 78643K 64 0 temp 144 3967K 4031K 78643K 35554 0 kqueue 3 4K 10K 78643K 126 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 arp 64 9 0 5 1 0 1 1 0 8 0 plcache 128 20 0 0 1 0 1 1 0 8 0 rtpcb 96 120 0 118 1 0 1 1 0 8 0 rtentry 112 124 0 91 2 1 1 2 0 8 0 unpcb 120 1033 0 1023 1 0 1 1 0 8 0 syncache 272 54 0 54 8 8 0 1 0 8 0 tcpqe 32 15 0 15 3 3 0 1 0 8 0 tcpcb 592 708 0 699 14 12 2 6 0 8 1 inpcb 296 2199 0 2190 5 3 2 3 0 8 1 nd6 48 27 0 24 1 0 1 1 0 8 0 pkpcb 40 23 0 23 3 3 0 1 0 8 0 kcovpl 48 3 0 1 1 0 1 1 0 8 0 ppxss 1136 10 0 9 1 0 1 1 0 8 0 pffrag 232 26 0 26 4 4 0 1 0 482 0 pffrnode 88 26 0 26 4 4 0 1 0 8 0 pffrent 40 750 0 750 4 4 0 1 0 8 0 pfosfp 40 846 0 423 5 0 5 5 0 8 0 pfosfpen 112 1428 0 714 21 0 21 21 0 8 0 pfrktable 1344 61 0 58 1 0 1 1 0 8 0 pftag 88 11 0 10 2 1 1 1 0 8 0 pfstitem 24 116 0 77 1 0 1 1 0 8 0 pfstkey 112 116 0 77 2 0 2 2 0 8 0 pfstate 328 116 0 77 5 1 4 4 0 8 0 pfrule 1360 74 0 51 3 1 2 2 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 631 0 483 15 5 10 13 0 8 0 art_table 32 632 0 483 2 0 2 2 0 8 0 art_node 16 123 0 93 1 0 1 1 0 8 0 semapl 112 367 0 357 1 0 1 1 0 8 0 shmpl 112 127 0 12 4 0 4 4 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 6537 0 5134 90 1 89 89 0 8 0 ffsino 272 6537 0 5134 95 0 95 95 0 8 0 nchpl 144 11357 0 9768 60 0 60 60 0 8 0 uvmvnodes 72 5926 0 0 108 0 108 108 0 8 0 vnodes 208 5926 0 0 312 0 312 312 0 8 0 namei 1024 28614 0 28614 2 1 1 1 0 8 1 percpumem 16 59 0 26 1 0 1 1 0 8 0 vcpupl 1984 5 0 0 1 0 1 1 0 8 0 vmpool 560 5 0 0 1 0 1 1 0 8 0 pfiaddrpl 120 30 0 25 1 0 1 1 0 8 0 scsiplug 72 4 0 4 1 0 1 1 0 8 1 scxspl 200 33323 0 33322 9 8 1 7 0 8 0 plimitpl 152 279 0 271 1 0 1 1 0 8 0 sigapl 424 4090 0 4039 6 0 6 6 0 8 0 futexpl 56 29602 0 29602 2 1 1 1 0 8 1 knotepl 112 225 0 205 1 0 1 1 0 8 0 kqueuepl 152 1470 0 1461 1 0 1 1 0 8 0 pipepl 304 337 0 326 6 4 2 2 0 8 1 fdescpl 496 4054 0 4039 3 0 3 3 0 8 0 filepl 152 15084 0 14982 5 0 5 5 0 8 0 lockfpl 104 644 0 643 1 0 1 1 0 8 0 lockfspl 48 262 0 261 1 0 1 1 0 8 0 sessionpl 120 20 0 9 1 0 1 1 0 8 0 pgrppl 48 20 0 9 1 0 1 1 0 8 0 ucredpl 96 2370 0 2359 1 0 1 1 0 8 0 zombiepl 144 4040 0 4039 1 0 1 1 0 8 0 processpl 1008 4090 0 4039 7 0 7 7 0 8 0 procpl 632 8899 0 8841 6 0 6 6 0 8 0 sosppl 144 34 0 33 4 3 1 1 0 8 0 sockpl 400 3375 0 3354 9 6 3 5 0 8 0 mcl64k 65536 17 0 0 3 0 3 3 0 8 0 mcl16k 16384 3 0 0 1 0 1 1 0 8 0 mcl12k 12288 8 0 0 1 0 1 1 0 8 0 mcl9k 9216 6 0 0 1 0 1 1 0 8 0 mcl8k 8192 17 0 0 3 0 3 3 0 8 0 mcl4k 4096 17 0 0 3 0 3 3 0 8 0 mcl2k2 2112 3 0 0 1 0 1 1 0 8 0 mcl2k 2048 204 0 0 16 0 16 16 0 8 0 mtagpl 96 213 0 0 5 0 5 5 0 8 0 mbufpl 256 736 0 0 41 0 41 41 0 8 0 bufpl 280 9111 0 2855 447 0 447 447 0 8 0 anonpl 16 302226 0 295498 50 12 38 44 0 124 10 amapchunkpl 152 16546 0 16364 21 13 8 12 0 158 0 amappl16 192 12831 0 12589 27 12 15 25 0 8 2 amappl15 184 1 0 1 1 1 0 1 0 8 0 amappl14 176 719 0 714 1 0 1 1 0 8 0 amappl13 168 80 0 77 1 0 1 1 0 8 0 amappl12 160 1233 0 1227 1 0 1 1 0 8 0 amappl11 152 61 0 45 1 0 1 1 0 8 0 amappl10 144 1924 0 1920 1 0 1 1 0 8 0 amappl9 136 372 0 371 2 1 1 1 0 8 0 amappl8 128 198 0 134 3 0 3 3 0 8 0 amappl7 120 2176 0 2168 1 0 1 1 0 8 0 amappl6 112 130 0 114 1 0 1 1 0 8 0 amappl5 104 4129 0 4116 1 0 1 1 0 8 0 amappl4 96 321 0 291 1 0 1 1 0 8 0 amappl3 88 810 0 803 1 0 1 1 0 8 0 amappl2 80 28965 0 28900 3 1 2 3 0 8 0 amappl1 72 112194 0 111750 24 14 10 19 0 8 0 amappl 80 9201 0 9138 2 0 2 2 0 84 0 dma4096 4096 1 0 1 1 1 0 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 64 129 0 12 2 0 2 2 0 8 0 uaddrrnd 24 4059 0 4039 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 4059 0 4039 1 0 1 1 0 8 0 vmmpekpl 168 20889 0 20837 3 0 3 3 0 8 0 vmmpepl 168 499479 0 498111 99 23 76 81 0 357 7 vmsppl 368 4058 0 4039 2 0 2 2 0 8 0 pdppl 4096 8125 0 8083 6 0 6 6 0 8 0 pvpl 32 1309002 0 1299011 180 65 115 121 0 265 31 pmappl 232 4058 0 4039 3 1 2 2 0 8 0 extentpl 40 53 0 36 1 0 1 1 0 8 0 phpool 112 303 0 24 9 0 9 9 0 8 0 ddb{0}> machine ddbcpu 0 Invalid cpu 0 ddb{0}> trace db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:398 panic(ffffffff823c5d16) at panic+0x15e sys/kern/subr_prf.c:218 __assert(ffffffff8242e558,ffffffff82428da8,207,ffffffff823ce69c) at __assert+0x2b sys/kern/subr_prf.c:162 kcov_remote_enter(0,ffff800020e00010) at kcov_remote_enter+0x155 sys/dev/kcov.c:519 taskq_thread(ffff80000002c000) at taskq_thread+0xd9 sys/kern/kern_task.c:447 end trace frame: 0x0, count: -5 ddb{0}> machine ddbcpu 1 Stopped at x86_ipi_db+0x1a: addq $0x8,%rsp x86_ipi_db(ffff800020d80ff0) at x86_ipi_db+0x1a sys/arch/amd64/amd64/db_interface.c:352 x86_ipi_handler() at x86_ipi_handler+0xb7 sys/arch/amd64/amd64/ipi.c:106 Xresume_lapic_ipi() at Xresume_lapic_ipi+0x23 __mp_lock(ffffffff8287d618) at __mp_lock+0xa2 read_rflags machine/cpufunc.h:195 [inline] __mp_lock(ffffffff8287d618) at __mp_lock+0xa2 intr_disable machine/cpufunc.h:216 [inline] __mp_lock(ffffffff8287d618) at __mp_lock+0xa2 sys/kern/kern_lock.c:142 __mp_acquire_count(ffffffff8287d618,1) at __mp_acquire_count+0x4c sys/kern/kern_lock.c:227 tsleep(fffffd806e8a5c78,118,ffffffff8242319e,3) at tsleep+0x191 kqueue_sleep(fffffd806e8a5c78,ffff800020ea7c10) at kqueue_sleep+0x101 sys/kern/kern_event.c:885 kqueue_scan(fffffd806e8a5c78,40,c0001af638,ffff800020ea7c10,ffff800020ea7b10,ffff800020de64f8) at kqueue_scan+0x280 sys/kern/kern_event.c:932 sys_kevent(ffff800020de64f8,ffff800020ea7cd0,ffff800020ea7d20) at sys_kevent+0x405 sys/kern/kern_event.c:640 syscall(ffff800020ea7da0) at syscall+0x4a1 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff800020ea7da0) at syscall+0x4a1 sys/arch/amd64/amd64/trap.c:570 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xc0001afe38, count: 4 ddb{1}> trace x86_ipi_db(ffff800020d80ff0) at x86_ipi_db+0x1a sys/arch/amd64/amd64/db_interface.c:352 x86_ipi_handler() at x86_ipi_handler+0xb7 sys/arch/amd64/amd64/ipi.c:106 Xresume_lapic_ipi() at Xresume_lapic_ipi+0x23 __mp_lock(ffffffff8287d618) at __mp_lock+0xa2 read_rflags machine/cpufunc.h:195 [inline] __mp_lock(ffffffff8287d618) at __mp_lock+0xa2 intr_disable machine/cpufunc.h:216 [inline] __mp_lock(ffffffff8287d618) at __mp_lock+0xa2 sys/kern/kern_lock.c:142 __mp_acquire_count(ffffffff8287d618,1) at __mp_acquire_count+0x4c sys/kern/kern_lock.c:227 tsleep(fffffd806e8a5c78,118,ffffffff8242319e,3) at tsleep+0x191 kqueue_sleep(fffffd806e8a5c78,ffff800020ea7c10) at kqueue_sleep+0x101 sys/kern/kern_event.c:885 kqueue_scan(fffffd806e8a5c78,40,c0001af638,ffff800020ea7c10,ffff800020ea7b10,ffff800020de64f8) at kqueue_scan+0x280 sys/kern/kern_event.c:932 sys_kevent(ffff800020de64f8,ffff800020ea7cd0,ffff800020ea7d20) at sys_kevent+0x405 sys/kern/kern_event.c:640 syscall(ffff800020ea7da0) at syscall+0x4a1 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff800020ea7da0) at syscall+0x4a1 sys/arch/amd64/amd64/trap.c:570 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xc0001afe38, count: -11