kernel: protection fault trap, code=0 Stopped at witness_checkorder+0x1ec: movl 0x8(%r14),%ebx ddb{1}> ddb{1}> set $lines = 0 ddb{1}> set $maxwidth = 0 ddb{1}> show panic the kernel did not panic ddb{1}> trace witness_checkorder(fffffd806f1b9010,9,0) at witness_checkorder+0x1ec sys/kern/subr_witness.c:794 mtx_enter(fffffd806f1b9000) at mtx_enter+0x3e sys/kern/kern_lock.c:265 knote_remove(ffff800021269560,fffffd806f1b9000,fffffd806f1b9088,5,0) at knote_remove+0x20d sys/kern/kern_event.c:1881 knote_fdclose(ffff800021269560,5) at knote_fdclose+0xae sys/kern/kern_event.c:1934 fdfree(ffff800021269560) at fdfree+0xdf sys/kern/kern_descrip.c:1196 exit1(ffff800021269560,0,0,1) at exit1+0x3e4 sys/kern/kern_exit.c:206 sys_exit(ffff800021269560,ffff800028fa0f40,ffff800028fa0f90) at sys_exit+0x1a sys/kern/kern_exit.c:89 syscall(ffff800028fa1010) at syscall+0x5e2 mi_syscall sys/sys/syscall_mi.h:110 [inline] syscall(ffff800028fa1010) at syscall+0x5e2 sys/arch/amd64/amd64/trap.c:623 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x72b9dafd4090, count: -9 ddb{1}> show registers rdi 0 rsi 0x20000 acpi_pdirpa+0xbe63 rbp 0xffff800028fa0ce0 rbx 0xe rdx 0 rcx 0xffff800021269560 rax 0xffff800020d58ff0 r8 0x1 r9 0x1 r10 0x95583b3972660240 r11 0x323379eab2dfd86a r12 0 r13 0xfffffd806f1b9010 r14 0xfffeffff00010000 r15 0xffff800021269560 rip 0xffffffff81eeff1c witness_checkorder+0x1ec cs 0x8 rflags 0x10246 __ALIGN_SIZE+0xf246 rsp 0xffff800028fa0c30 ss 0x10 witness_checkorder+0x1ec: movl 0x8(%r14),%ebx ddb{1}> show proc PROC (syz-executor.0) pid=65267 stat=onproc flags process=1018 proc=2000 pri=0, usrpri=65, nice=20 forw=0xffffffffffffffff, list=0xffff8000212a2000,0xffff8000212a2ab0 process=0xffff800028fb0018 user=0xffff800028f9c000, vmspace=0xfffffd806a295020 estcpu=36, cpticks=1, pctcpu=0.0 user=0, sys=0, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 88158 34644 5135 32767 2 0x10 syz-executor.7 61702 430609 50466 32767 2 0x10 syz-executor.3 61702 17593 50466 32767 3 0x4000090 fsleep syz-executor.3 93166 426810 89060 32767 2 0x10 syz-executor.4 93166 53267 89060 32767 2 0x4000010 syz-executor.4 6209 407487 19904 32767 2 0x10 syz-executor.5 6209 422830 19904 32767 3 0x4000090 fsleep syz-executor.5 6209 90311 19904 32767 2 0x4000010 syz-executor.5 69745 70004 32435 32767 3 0x10 biowait syz-executor.2 5135 233603 97843 32767 3 0x90 nanoslp syz-executor.7 97843 261383 99361 0 3 0x82 wait syz-executor.7 19904 13580 51917 32767 3 0x90 nanoslp syz-executor.5 75278 455515 94112 32767 3 0x10 biowait syz-executor.6 51917 403365 99361 0 3 0x82 wait syz-executor.5 94112 141986 99361 0 3 0x82 wait syz-executor.6 89060 347067 98239 32767 2 0x10 syz-executor.4 98239 26655 99361 0 3 0x82 wait syz-executor.4 41021 222432 77981 32767 3 0x10 biowait syz-executor.1 32435 514698 99361 0 3 0x82 wait syz-executor.2 50466 159680 44554 32767 2 0x10 syz-executor.3 77981 9921 99361 0 3 0x82 wait syz-executor.1 44554 381828 99361 0 3 0x82 wait syz-executor.3 42508 520488 37757 32767 3 0x90 nanoslp syz-executor.0 37757 59312 99361 0 3 0x82 wait syz-executor.0 99361 82770 14326 0 3 0x2000082 wait syz-fuzzer 99361 29144 14326 0 3 0x6000082 nanoslp syz-fuzzer 99361 368104 14326 0 3 0x6000082 wait syz-fuzzer 99361 379854 14326 0 3 0x6000082 thrsleep syz-fuzzer 99361 60589 14326 0 3 0x6000082 wait syz-fuzzer 99361 441012 14326 0 3 0x6000082 wait syz-fuzzer 99361 408212 14326 0 3 0x6000082 wait syz-fuzzer 99361 445536 14326 0 3 0x6000082 wait syz-fuzzer 99361 13070 14326 0 3 0x6000082 thrsleep syz-fuzzer 99361 426509 14326 0 3 0x6000082 wait syz-fuzzer 99361 233285 14326 0 3 0x6000082 wait syz-fuzzer 99361 434485 14326 0 3 0x6000082 thrsleep syz-fuzzer 99361 228836 14326 0 3 0x6000082 thrsleep syz-fuzzer 99361 427940 14326 0 2 0x6000002 syz-fuzzer 99361 137260 14326 0 7 0x6000002 syz-fuzzer 14326 105538 93016 0 3 0x10008a sigsusp ksh 93016 53765 6547 0 3 0x9a kqread sshd 85527 495074 1 0 3 0x100083 ttyin getty 6547 440180 1 0 3 0x88 kqread sshd 99039 190974 1550 73 3 0x1100090 kqread syslogd 1550 128157 1 0 3 0x100082 netio syslogd 84946 497366 1 0 3 0x100080 kqread resolvd 13379 309266 88376 77 3 0x100092 kqread dhcpleased 96081 195825 88376 77 3 0x100092 kqread dhcpleased 88376 170022 1 0 3 0x80 kqread dhcpleased 45295 222069 0 0 3 0x14200 bored smr 39083 314450 0 0 2 0x14200 zerothread 12381 203472 0 0 3 0x14200 aiodoned aiodoned 79045 431647 0 0 3 0x14200 syncer update 22337 97834 0 0 3 0x14200 cleaner cleaner 78973 447559 0 0 2 0x14200 reaper 49631 402372 0 0 3 0x14200 pgdaemon pagedaemon 13345 393070 0 0 3 0x14200 bored viomb 51981 215962 0 0 3 0x40014200 acpi0 acpi0 33 316113 0 0 3 0x40014200 idle1 18168 275760 0 0 3 0x14200 bored softnet3 55789 137133 0 0 3 0x14200 bored softnet2 30981 193852 0 0 3 0x14200 bored softnet1 24636 479078 0 0 3 0x14200 bored softnet0 53742 131883 0 0 3 0x14200 bored systqmp 1193 151157 0 0 3 0x14200 bored systq 5723 72916 0 0 3 0x40014200 bored softclock 35324 445148 0 0 3 0x40014200 idle0 1 255093 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{1}> show all locks Process 69745 (syz-executor.2) thread 0xffff8000212a2ff0 (70004) exclusive rrwlock inode r = 0 (0xfffffd806c738d68) #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 (0xfffffd80671b8a30) #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 Process 75278 (syz-executor.6) thread 0xffff8000212a3d38 (455515) exclusive rrwlock inode r = 0 (0xfffffd806c738a38) #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 (0xfffffd80671b8c50) #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 Process 41021 (syz-executor.1) thread 0xffff800021269ab0 (222432) exclusive rrwlock inode r = 0 (0xfffffd806c7384e8) #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 (0xfffffd80671b8d60) #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{1}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10182 6408K 6420K 78643K 11260 0 pcb 13 8K 8K 78643K 13 0 rtable 234 6K 6K 78643K 350 0 pf 29 8K 8K 78643K 29 0 ifaddr 44 15K 15K 78643K 46 0 ifgroup 50 2K 2K 78643K 50 0 counters 60 35K 35K 78643K 60 0 ioctlops 0 0K 2K 78643K 63 0 iov 0 0K 0K 78643K 4 0 mount 1 1K 1K 78643K 1 0 log 0 0K 0K 78643K 4 0 vnodes 1278 80K 80K 78643K 1291 0 UFS quota 1 32K 32K 78643K 1 0 UFS mount 5 36K 36K 78643K 5 0 shm 2 1K 1K 78643K 2 0 VM map 2 1K 1K 78643K 2 0 sem 11 0K 0K 78643K 11 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1697 195K 286K 78643K 12548 0 file desc 23 85K 117K 78643K 224 0 sigio 0 0K 0K 78643K 4 0 proc 56 78K 115K 78643K 471 0 subproc 104 6K 6K 78643K 104 0 NFS srvsock 1 0K 0K 78643K 1 0 NFS daemon 1 16K 16K 78643K 1 0 ip_moptions 0 0K 0K 78643K 11 0 in_multi 99 7K 7K 78643K 99 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 37 175K 175K 78643K 37 0 exec 0 0K 1K 78643K 399 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 307 82K 87K 78643K 4227 0 UVM aobj 3 2K 2K 78643K 3 0 memdesc 1 4K 4K 78643K 1 0 crypto data 1 1K 1K 78643K 1 0 NDP 13 0K 2K 78643K 27 0 temp 45 5909K 5973K 78643K 4244 0 kqueue 12 18K 20K 78643K 27 0 SYN cache 2 16K 16K 78643K 2 0 ddb{1}> 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 36 0 33 1 0 1 1 0 8 0 rtentry 112 111 0 1 4 0 4 4 0 8 0 unpcb 144 206 0 189 6 0 6 6 0 8 5 syncache 304 4 0 4 1 1 0 1 0 8 0 tcpqe 32 289 0 289 2 1 1 1 0 8 1 tcpcb 808 38 0 30 1 0 1 1 0 8 0 arp 120 18 0 0 1 0 1 1 0 8 0 inpcb 368 152 0 140 4 0 4 4 0 8 2 nd6 136 24 0 0 1 0 1 1 0 8 0 kcovpl 48 8 0 0 1 0 1 1 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 453 0 0 29 0 29 29 0 8 0 art_table 32 454 0 0 4 0 4 4 0 8 0 art_node 16 110 0 10 1 0 1 1 0 8 0 sysvmsgpl 40 4 0 4 1 0 1 1 0 8 1 semupl 112 3 0 3 1 0 1 1 0 8 1 semapl 112 9 0 0 1 0 1 1 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 1579 0 141 90 0 90 90 0 8 0 ffsino 272 1579 0 141 96 0 96 96 0 8 0 nchpl 144 1959 0 281 63 0 63 63 0 8 0 uvmvnodes 80 1692 0 0 35 0 35 35 0 8 0 vnodes 216 1692 0 0 94 0 94 94 0 8 0 namei 1024 7130 0 7130 2 0 2 2 0 8 2 percpumem 16 43 0 0 1 0 1 1 0 8 0 kstatmem 264 22 0 0 2 0 2 2 0 8 0 scxspl 216 7045 0 7042 6 2 4 4 1 8 3 plimitpl 152 44 0 21 1 0 1 1 0 8 0 sigapl 424 521 0 470 7 0 7 7 0 8 0 futexpl 64 1113 0 1111 1 0 1 1 0 8 0 knotepl 120 104 0 0 4 0 4 4 0 8 0 kqueuepl 216 23 0 15 1 0 1 1 0 8 0 pipepl 320 147 0 119 3 0 3 3 0 8 0 fdescpl 496 504 0 470 7 1 6 6 0 8 1 filepl 152 2629 0 2387 17 0 17 17 0 8 7 lockfpl 104 23 0 21 1 0 1 1 0 8 0 lockfspl 48 12 0 10 1 0 1 1 0 8 0 sessionpl 144 23 0 7 1 0 1 1 0 8 0 pgrppl 48 27 0 11 1 0 1 1 0 8 0 ucredpl 104 105 0 87 1 0 1 1 0 8 0 zombiepl 144 471 0 470 1 0 1 1 0 8 0 processpl 1072 521 0 470 4 0 4 4 0 8 0 procpl 680 698 0 628 7 0 7 7 0 8 0 sockpl 488 394 0 362 20 0 20 20 0 8 15 mcl64k 65536 3 0 0 1 0 1 1 0 8 0 mcl16k 16384 1 0 0 1 0 1 1 0 8 0 mcl12k 12288 2 0 0 1 0 1 1 0 8 0 mcl8k 8192 8 0 0 1 0 1 1 0 8 0 mcl4k 4096 12 0 0 2 0 2 2 0 8 0 mcl2k2 2112 1 0 0 1 0 1 1 0 8 0 mcl2k 2048 243 0 0 31 0 31 31 0 8 0 mtagpl 96 2 0 0 1 0 1 1 0 8 0 mbufpl 256 245 0 0 16 0 16 16 0 8 0 bufpl 288 4371 0 146 302 0 302 302 0 8 0 anonpl 24 207871 0 197855 62 0 62 62 0 186 0 amapchunkpl 152 14312 0 13489 38 0 38 38 0 158 3 amappl16 200 5867 0 5632 14 0 14 14 0 8 1 amappl15 192 15 0 15 1 1 0 1 0 8 0 amappl14 184 148 0 136 2 0 2 2 0 8 1 amappl13 176 11 0 11 1 1 0 1 0 8 0 amappl12 168 1127 0 1092 2 0 2 2 0 8 0 amappl11 160 57 0 47 1 0 1 1 0 8 0 amappl10 152 38 0 28 1 0 1 1 0 8 0 amappl9 144 193 0 193 1 0 1 1 0 8 1 amappl8 136 163 0 121 2 0 2 2 0 8 0 amappl7 128 59 0 48 2 0 2 2 0 8 0 amappl6 120 229 0 211 2 0 2 2 0 8 1 amappl5 112 172 0 161 1 0 1 1 0 8 0 amappl4 104 593 0 554 3 0 3 3 0 8 1 amappl3 96 3156 0 3072 3 0 3 3 0 8 0 amappl2 88 728 0 659 3 0 3 3 0 8 1 amappl1 80 10031 0 9505 22 1 21 22 0 8 8 amappl 88 3739 0 3514 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 2 0 0 1 0 1 1 0 8 0 uaddrrnd 24 504 0 470 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 504 0 470 1 0 1 1 0 8 0 vmmpekpl 168 9866 0 9803 4 0 4 4 0 8 0 vmmpepl 168 52741 0 50556 111 0 111 111 0 357 13 vmsppl 464 503 0 470 7 1 6 6 0 8 1 rwobjpl 56 22343 0 19454 45 0 45 45 0 8 4 pdppl 4096 1016 0 940 112 24 88 92 0 8 12 pvpl 32 430362 0 414389 343 4 339 343 0 265 209 pmappl 248 503 0 470 4 1 3 3 0 8 0 extentpl 40 56 0 38 1 0 1 1 0 8 0 phpool 112 702 0 26 20 0 20 20 0 8 0 ddb{1}> machine ddbcpu 0 Stopped at x86_ipi_db+0x1e: addq $0x8,%rsp ddb{0}> trace x86_ipi_db(ffffffff82bfcff0) 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(ffffffff82d48c68) at __mp_lock+0x129 __mp_lock_spin sys/kern/kern_lock.c:116 [inline] __mp_lock(ffffffff82d48c68) at __mp_lock+0x129 sys/kern/kern_lock.c:147 intr_handler(ffff80002c9d1810,ffff80000027b500) at intr_handler+0x62 sys/arch/amd64/amd64/intr.c:532 Xintr_ioapic_edge25_untramp() at Xintr_ioapic_edge25_untramp+0x18f __mp_lock(ffffffff82d48c68) at __mp_lock+0x122 __mp_lock_spin sys/kern/kern_lock.c:116 [inline] __mp_lock(ffffffff82d48c68) at __mp_lock+0x122 sys/kern/kern_lock.c:147 intr_handler(ffff80002c9d1960,ffff80000007b080) at intr_handler+0x62 sys/arch/amd64/amd64/intr.c:532 Xintr_ioapic_edge23_untramp() at Xintr_ioapic_edge23_untramp+0x18f end of kernel end trace frame: 0xc000fd5e40, count: -9 ddb{0}> machine ddbcpu 1 Stopped at witness_checkorder+0x1ec: movl 0x8(%r14),%ebx ddb{1}> trace witness_checkorder(fffffd806f1b9010,9,0) at witness_checkorder+0x1ec sys/kern/subr_witness.c:794 mtx_enter(fffffd806f1b9000) at mtx_enter+0x3e sys/kern/kern_lock.c:265 knote_remove(ffff800021269560,fffffd806f1b9000,fffffd806f1b9088,5,0) at knote_remove+0x20d sys/kern/kern_event.c:1881 knote_fdclose(ffff800021269560,5) at knote_fdclose+0xae sys/kern/kern_event.c:1934 fdfree(ffff800021269560) at fdfree+0xdf sys/kern/kern_descrip.c:1196 exit1(ffff800021269560,0,0,1) at exit1+0x3e4 sys/kern/kern_exit.c:206 sys_exit(ffff800021269560,ffff800028fa0f40,ffff800028fa0f90) at sys_exit+0x1a sys/kern/kern_exit.c:89 syscall(ffff800028fa1010) at syscall+0x5e2 mi_syscall sys/sys/syscall_mi.h:110 [inline] syscall(ffff800028fa1010) at syscall+0x5e2 sys/arch/amd64/amd64/trap.c:623 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x72b9dafd4090, count: -9