witness: lock order reversal: 1st 0xffff8000fffea070 fdlock (&newfdp->fd_fd.fd_lock) 2nd 0xfffffd806e7b80f0 inode (&ip->i_lock) lock order [1] fdlock (&newfdp->fd_fd.fd_lock) -> [2] inode (&ip->i_lock) lock order data 0xffffffff8338ef30 -> 0xffffffff83381574 is missing lock order [2] inode (&ip->i_lock) -> [3] sbufrcv (&so->so_rcv.sb_lock) #0 rw_do_enter_write+0xba sys/kern/kern_rwlock.c:234 #1 sblock+0xb6 sys/kern/uipc_socket2.c:536 #2 soreceive+0x27d sys/kern/uipc_socket.c:878 #3 fifo_read+0x117 sys/miscfs/fifofs/fifo_vnops.c:264 #4 VOP_READ+0x101 sys/kern/vfs_vops.c:227 #5 vn_rdwr+0x15b sys/kern/vfs_vnops.c:-1 #6 vndsetcred+0xa1 sys/dev/vnd.c:685 #7 vndioctl+0xdfc sys/dev/vnd.c:486 #8 VOP_IOCTL+0xac sys/kern/vfs_vops.c:264 #9 vn_ioctl+0xf8 sys/kern/vfs_vnops.c:531 #10 sys_ioctl+0x674 sys/kern/sys_generic.c:-1 #11 syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline] #11 syscall+0xbd4 sys/arch/amd64/amd64/trap.c:775 #12 Xsyscall+0x128 lock order [3] sbufrcv (&so->so_rcv.sb_lock) -> [1] fdlock (&newfdp->fd_fd.fd_lock) #0 rw_do_enter_write+0xba sys/kern/kern_rwlock.c:234 #1 unp_externalize+0x3cf sys/kern/uipc_usrreq.c:1074 #2 soreceive+0xc24 sys/kern/uipc_socket.c:1017 #3 recvit+0x40b sys/kern/uipc_syscalls.c:1078 #4 sys_recvmsg+0x1bf sys/kern/uipc_syscalls.c:878 #5 syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline] #5 syscall+0xbd4 sys/arch/amd64/amd64/trap.c:775 #6 Xsyscall+0x128 Stopped at db_enter+0x25: addq $0x8,%rsp ddb{1}> ddb{1}> set $lines = 0 ddb{1}> set $maxwidth = 0 ddb{1}> show panic the kernel did not panic ddb{1}> trace db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 witness_checkorder(fffffd806e7b80f0,9,0) at witness_checkorder+0x10d1 sys/kern/subr_witness.c:-1 rw_do_enter_write(fffffd806e7b80d8,1) at rw_do_enter_write+0xba sys/kern/kern_rwlock.c:234 rrw_enter(fffffd806e7b80d8,1) at rrw_enter+0xc6 sys/kern/kern_rwlock.c:621 VOP_LOCK(fffffd806e7bb480,2001) at VOP_LOCK+0xbd sys/kern/vfs_vops.c:527 vn_lock(fffffd806e7bb480,2001) at vn_lock+0xa4 sys/kern/vfs_vnops.c:570 vn_closefile(fffffd806c742d70,ffff8000fffe8550) at vn_closefile+0x111 vn_close sys/kern/vfs_vnops.c:292 [inline] vn_closefile(fffffd806c742d70,ffff8000fffe8550) at vn_closefile+0x111 sys/kern/vfs_vnops.c:615 fdrop(fffffd806c742d70,ffff8000fffe8550) at fdrop+0x121 sys/kern/kern_descrip.c:1280 knote_drop(fffffd806c464180,ffff8000fffe8550) at knote_drop+0x1a1 sys/kern/kern_event.c:2296 knote_remove(ffff8000fffe8550,fffffd806f65f000,fffffd806f65f090,3,0) at knote_remove+0x215 sys/kern/kern_event.c:-1 knote_fdclose(ffff8000fffe8550,3) at knote_fdclose+0xf9 sys/kern/kern_event.c:2203 fdrelease(ffff8000fffe8550,3) at fdrelease+0xf9 sys/kern/kern_descrip.c:760 syscall(ffff80003c3ecc10) at syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003c3ecc10) at syscall+0xbd4 sys/arch/amd64/amd64/trap.c:775 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xcabb6a38560, count: -14 ddb{1}> show registers rdi 0 rsi 0x80000 acpi_pdirpa+0x6be71 rbp 0xffff80003c3ec6d0 rbx 0 rdx 0xffff800001587780 rcx 0xffff8000fffe8550 rax 0x7ffff acpi_pdirpa+0x6be70 r8 0xffff80003c3ec5b0 r9 0x8080808080808080 r10 0xa8eed8ddd248010c r11 0x732a98120c448587 r12 0xfffffd8003f4cd00 r13 0xfffffd8004739ac0 r14 0x3 r15 0xffffffff8341966f substchar+0x99b5 rip 0xffffffff8205cc95 db_enter+0x25 cs 0x8 rflags 0x246 rsp 0xffff80003c3ec6c0 ss 0x10 db_enter+0x25: addq $0x8,%rsp ddb{1}> show proc PROC (syz-executor) tid=209297 pid=99495 tcnt=2 stat=onproc flags process=0 proc=4000000 runpri=32, usrpri=50, slppri=32, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff8000fffe8fb0,0xffff8000fffe94f0 process=0xffff8000fffe5830 user=0xffff80003c3e7000, vmspace=0xfffffd806c96f7b8 estcpu=36, cpticks=0, pctcpu=0.0, user=0, sys=0, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 75758 86292 33711 0 2 0 syz-executor 99495 224553 79252 0 7 0 syz-executor *99495 209297 79252 0 7 0x4000000 syz-executor 66321 119075 64105 0 2 0 syz-executor 66321 98118 64105 0 3 0x4000080 ttyout syz-executor 66321 286497 64105 0 3 0x4000080 fsleep syz-executor 71990 181606 822 0 2 0 syz-executor 71990 55981 822 0 3 0x4000000 biowait syz-executor 71990 291783 822 0 3 0x4000000 inode syz-executor 71990 497803 822 0 3 0x4000000 inode syz-executor 61978 292528 23156 0 2 0x82000 syz-executor 61978 497738 23156 0 3 0x4002000 suspend syz-executor 61978 168279 23156 0 4 0x4082000 syz-executor 61978 425387 23156 0 4 0x4082000 syz-executor 82777 5715 31611 0 3 0x80 nanoslp syz-executor 82777 136494 31611 0 3 0x4000080 ttyin syz-executor 82777 189984 31611 0 3 0x4000080 fsleep syz-executor 19942 430216 78922 0 3 0x80 nanoslp syz-executor 19942 83412 78922 0 3 0x4000080 fsleep syz-executor 19942 329705 78922 0 3 0x4000080 ttyin syz-executor 19942 392579 78922 0 3 0x4000080 fsleep syz-executor 55480 193161 79845 0 2 0 syz-executor 55480 305375 79845 0 3 0x4000080 fsleep syz-executor 55480 49940 79845 0 3 0x4000080 fsleep syz-executor 55480 2461 79845 0 3 0x4000080 fsleep syz-executor 79252 308259 2517 0 3 0x82 nanoslp syz-executor 79845 315373 2517 0 3 0x82 nanoslp syz-executor 31611 427034 2517 0 3 0x82 nanoslp syz-executor 78922 290127 2517 0 3 0x82 nanoslp syz-executor 64105 211338 2517 0 3 0x82 nanoslp syz-executor 33711 255518 2517 0 3 0x82 nanoslp syz-executor 822 12957 2517 0 3 0x82 nanoslp syz-executor 23156 132543 2517 0 3 0x82 nanoslp syz-executor 2517 21479 13672 0 3 0x82 kqread syz-executor 13672 420352 99171 0 3 0x10008a sigsusp ksh 99171 419604 59317 0 3 0x98 kqread sshd-session 59317 207587 94656 0 3 0x92 kqread sshd-session 13824 113659 1 0 3 0x100083 ttyin getty 94656 205021 1 0 3 0x88 kqread sshd 87904 384921 52191 74 3 0x1100092 bpf pflogd 52191 479825 1 0 3 0x80 sbwait pflogd 47762 71043 48020 73 3 0x1100090 kqread syslogd 48020 429686 1 0 3 0x100082 sbwait syslogd 72942 135372 1 0 3 0x100080 kqread resolvd 46733 489167 97860 77 3 0x100092 kqread dhcpleased 70089 424090 97860 77 3 0x100092 kqread dhcpleased 97860 28121 1 0 3 0x80 kqread dhcpleased 86198 333435 0 0 3 0x14200 bored smr 31654 373027 0 0 2 0x14200 zerothread 43642 300948 0 0 3 0x14200 aiodoned aiodoned 11574 366249 0 0 3 0x14200 syncer update 57171 310889 0 0 3 0x14200 cleaner cleaner 14117 524101 0 0 3 0x14200 reaper reaper 61556 258930 0 0 3 0x14200 pgdaemon pagedaemon 22665 51450 0 0 3 0x14200 bored viomb 74042 30518 0 0 3 0x40014200 acpi0 acpi0 27828 365528 0 0 3 0x40014200 idle1 37643 58697 0 0 3 0x14200 bored softnet1 41815 258280 0 0 2 0x14200 softnet0 65578 487885 0 0 3 0x14200 bored systqmp 72945 491521 0 0 3 0x14200 bored systq 48067 309071 0 0 3 0x14200 tmoslp softclockmp 11003 116613 0 0 3 0x40014200 tmoslp softclock 81804 303852 0 0 3 0x40014200 idle0 1 330437 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{1}> show all locks Process 99495 (syz-executor) thread 0xffff8000fffe8550 (209297) exclusive kernel_lock &kernel_lock r = 0 (0xffffffff83934e80) #0 witness_lock+0x5f1 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5f1 sys/kern/subr_witness.c:1160 #1 vn_closefile+0x41 sys/kern/vfs_vnops.c:608 #2 fdrop+0x121 sys/kern/kern_descrip.c:1280 #3 knote_drop+0x1a1 sys/kern/kern_event.c:2296 #4 knote_remove+0x215 sys/kern/kern_event.c:-1 #5 knote_fdclose+0xf9 sys/kern/kern_event.c:2203 #6 fdrelease+0xf9 sys/kern/kern_descrip.c:760 #7 syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline] #7 syscall+0xbd4 sys/arch/amd64/amd64/trap.c:775 #8 Xsyscall+0x128 exclusive rwlock fdlock r = 0 (0xffff8000fffea070) #0 witness_lock+0x5f1 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5f1 sys/kern/subr_witness.c:1160 #1 rw_do_enter_write+0x419 sys/kern/kern_rwlock.c:320 #2 sys_close+0xd0 sys/kern/kern_descrip.c:778 #3 syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline] #3 syscall+0xbd4 sys/arch/amd64/amd64/trap.c:775 #4 Xsyscall+0x128 Process 71990 (syz-executor) thread 0xffff80002a261ca0 (55981) exclusive rrwlock inode r = 0 (0xfffffd8077dc1378) #0 witness_lock+0x5f1 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5f1 sys/kern/subr_witness.c:1160 #1 rw_do_enter_write+0x419 sys/kern/kern_rwlock.c:320 #2 rrw_enter+0xc6 sys/kern/kern_rwlock.c:621 #3 VOP_LOCK+0xbd sys/kern/vfs_vops.c:527 #4 vn_lock+0xa4 sys/kern/vfs_vnops.c:570 #5 vn_write+0x18f sys/kern/vfs_vnops.c:405 #6 dofilewritev+0x242 sys/kern/sys_generic.c:380 #7 sys_write+0xa2 sys/kern/sys_generic.c:300 #8 syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline] #8 syscall+0xbd4 sys/arch/amd64/amd64/trap.c:775 #9 Xsyscall+0x128 Process 71990 (syz-executor) thread 0xffff80002a2607e0 (291783) exclusive rrwlock inode r = 0 (0xfffffd806c4cf330) #0 witness_lock+0x5f1 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5f1 sys/kern/subr_witness.c:1160 #1 rw_do_enter_write+0x419 sys/kern/kern_rwlock.c:320 #2 rrw_enter+0xc6 sys/kern/kern_rwlock.c:621 #3 VOP_LOCK+0xbd sys/kern/vfs_vops.c:527 #4 vn_lock+0xa4 sys/kern/vfs_vnops.c:570 #5 vfs_lookup+0x11c sys/kern/vfs_lookup.c:-1 #6 namei+0x7ca sys/kern/vfs_lookup.c:250 #7 domknodat+0xb4 sys/kern/vfs_syscalls.c:1592 #8 syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] #8 syscall+0xb17 sys/arch/amd64/amd64/trap.c:775 #9 Xsyscall+0x128 ddb{1}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 11068 12182K 12255K 166960K 12233 0 pcb 18 13K 14K 166960K 77 0 rtable 253 9K 9K 166960K 386 0 pf 34 17K 19K 166960K 47 0 ifaddr 44 7K 8K 166960K 52 0 ifgroup 55 2K 2K 166960K 63 0 sysctl 3 1K 9K 166960K 7 0 counters 70 37K 37K 166960K 82 0 ioctlops 0 0K 4K 166960K 1477 0 iov 0 0K 20K 166960K 6 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1345 85K 85K 166960K 1424 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 1K 166960K 2 0 VM map 2 1K 1K 166960K 2 0 sem 3 0K 0K 166960K 4 0 dirhash 12 2K 2K 166960K 12 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 18 65K 97K 166960K 203 0 sigio 0 0K 0K 166960K 2 0 proc 71 115K 164K 166960K 536 0 subproc 72 4K 4K 166960K 72 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 10 0 in_multi 103 7K 7K 166960K 107 0 ether_multi 1 0K 0K 166960K 1 0 mrt 1 0K 0K 166960K 1 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 79 360K 360K 166960K 79 0 exec 0 0K 1K 166960K 393 0 fusefs mount 1 32K 32K 166960K 1 0 tdb 3 0K 0K 166960K 3 0 VM swap 8 62K 64K 166960K 10 0 UVM amap 263 168K 176K 166960K 3792 0 UVM aobj 4 2K 2K 166960K 4 0 pinsyscall 43 86K 106K 166960K 1367 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 6 0 NDP 12 0K 2K 166960K 32 0 temp 36 8666K 8731K 166960K 4658 0 kqueue 16 26K 26K 166960K 37 0 SYN cache 2 16K 16K 166960K 2 0 ddb{1}> show all pools Name Size Requests Fail Releases Pgreq Pgrel Npage Hiwat Minpg Maxpg Idle plcache 128 26 0 0 1 0 1 1 0 8 0 rtpcb 120 44 0 40 1 0 1 1 0 8 0 rtentry 176 114 0 1 6 0 6 6 0 8 0 unpcb 144 69 0 52 1 0 1 1 0 8 0 syncache 336 3 0 3 1 0 1 1 0 8 1 tcpcb 736 26 0 21 1 0 1 1 0 8 0 arp 136 19 0 0 1 0 1 1 0 8 0 inpcb 328 160 0 150 4 0 4 4 0 8 3 nd6 152 25 0 0 1 0 1 1 0 8 0 kcovpl 48 8 0 0 1 0 1 1 0 8 0 ppxss 1192 6 0 6 1 0 1 1 0 8 1 pffrag 232 1 0 0 1 0 1 1 0 482 0 pffrnode 88 1 0 0 1 0 1 1 0 8 0 pffrent 40 1 0 0 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 art_heap8 4096 2 0 0 2 0 2 2 0 8 0 art_heap4 256 460 0 6 29 0 29 29 0 8 0 art_table 40 462 0 6 5 0 5 5 0 8 0 art_node 32 114 0 12 1 0 1 1 0 8 0 sysvmsgpl 40 2 0 2 1 0 1 1 0 8 1 semapl 112 2 0 1 1 0 1 1 0 8 0 shmpl 112 1 0 0 1 0 1 1 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 1709 0 192 96 0 96 96 0 8 0 ffsino 296 1709 0 192 117 0 117 117 0 8 0 nchpl 144 1992 0 288 64 0 64 64 0 8 0 rtmask 32 1 0 1 1 0 1 1 0 8 1 vnodes 216 1824 0 0 102 0 102 102 0 8 0 namei 1024 6121 0 6118 1 0 1 1 0 8 0 percpumem 16 56 0 6 1 0 1 1 0 8 0 kstatmem 264 34 0 8 3 0 3 3 0 8 1 scxspl 216 7848 0 7847 10 2 8 8 1 8 7 plimitpl 152 167 0 146 1 0 1 1 0 8 0 sigapl 424 523 0 475 7 0 7 7 0 8 1 knotepl 120 290 0 0 9 0 9 9 0 8 0 kqueuepl 224 45 0 33 1 0 1 1 0 8 0 pipepl 344 123 0 96 3 0 3 3 0 8 0 fdescpl 528 507 0 475 3 0 3 3 0 8 0 filepl 160 2047 0 1809 11 0 11 11 0 8 0 lockfpl 104 31 0 27 1 0 1 1 0 8 0 lockfspl 48 17 0 13 1 0 1 1 0 8 0 sessionpl 144 22 0 13 1 0 1 1 0 8 0 pgrppl 48 30 0 13 1 0 1 1 0 8 0 ucredpl 104 192 0 178 1 0 1 1 0 8 0 zombiepl 144 475 0 475 1 0 1 1 0 8 1 processpl 1232 523 0 475 5 0 5 5 0 8 0 procpl 664 652 0 587 6 0 6 6 0 8 0 sockpl 752 278 0 247 7 0 7 7 0 8 3 mcl64k 65536 2 0 0 1 0 1 1 0 8 0 mcl8k 8192 1 0 0 1 0 1 1 0 8 0 mcl4k 4096 116 0 0 15 0 15 15 0 8 0 mcl2k 2048 23 0 0 3 0 3 3 0 8 0 mtagpl 96 3 0 0 1 0 1 1 0 8 0 mbufpl 256 157 0 0 10 0 10 10 0 8 0 bufpl 280 3647 0 131 252 0 252 252 0 8 0 anonpl 32 8420 0 0 68 0 68 68 0 246 0 amapchunkpl 152 10798 0 10232 24 0 24 24 0 158 0 amappl16 200 2497 0 2196 19 2 17 17 0 8 0 amappl15 192 6 0 6 1 1 0 1 0 8 0 amappl14 184 5 0 5 1 1 0 1 0 8 0 amappl13 176 437 0 436 1 0 1 1 0 8 0 amappl12 168 876 0 834 3 0 3 3 0 8 0 amappl11 160 8 0 7 1 0 1 1 0 8 0 amappl10 152 56 0 41 1 0 1 1 0 8 0 amappl9 144 250 0 250 1 1 0 1 0 8 0 amappl8 136 31 0 29 1 0 1 1 0 8 0 amappl7 128 81 0 80 1 0 1 1 0 8 0 amappl6 120 286 0 273 1 0 1 1 0 8 0 amappl5 112 80 0 70 1 0 1 1 0 8 0 amappl4 104 428 0 398 1 0 1 1 0 8 0 amappl3 96 1717 0 1613 4 1 3 3 0 8 0 amappl2 88 618 0 543 2 0 2 2 0 8 0 amappl1 80 9516 0 8925 14 0 14 14 0 8 1 amappl 88 3026 0 2841 5 0 5 5 0 92 0 uvmvnodes 80 101 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 3 0 0 1 0 1 1 0 8 0 uaddrrnd 24 507 0 475 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 507 0 475 1 0 1 1 0 8 0 vmmpekpl 168 5951 0 5919 2 0 2 2 0 8 0 vmmpepl 168 40735 0 38493 100 0 100 100 0 357 0 vmsppl 488 506 0 475 5 0 5 5 0 8 1 rwobjpl 80 15004 0 13678 28 0 28 28 0 8 0 pdppl 4096 1021 0 950 103 32 71 87 0 8 0 pvpl 32 15808 0 0 128 0 128 128 0 265 0 pmappl 256 506 0 475 3 0 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 272 0 34 8 0 8 8 0 8 0 ddb{1}> machine ddbcpu 0 Stopped at x86_ipi_db+0x27: addq $0x8,%rsp ddb{0}> trace x86_ipi_db(ffffffff8384eff0) at x86_ipi_db+0x27 sys/arch/amd64/amd64/db_interface.c:394 x86_ipi_handler() at x86_ipi_handler+0xd9 sys/arch/amd64/amd64/ipi.c:106 Xresume_lapic_ipi() at Xresume_lapic_ipi+0x27 __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0xf kd_curproc sys/dev/kcov.c:580 [inline] __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0xf sys/dev/kcov.c:153 intr_handler(ffff800035fc83d0,ffff800000079600) at intr_handler+0xe9 sys/arch/amd64/amd64/intr.c:560 Xintr_ioapic_edge16_untramp() at Xintr_ioapic_edge16_untramp+0x18f __mp_lock(ffffffff83934680) at __mp_lock+0x199 __mp_lock_spin sys/kern/kern_lock.c:142 [inline] __mp_lock(ffffffff83934680) at __mp_lock+0x199 sys/kern/kern_lock.c:173 intr_handler(ffff800035fc8530,ffff8000002a3480) at intr_handler+0xe9 sys/arch/amd64/amd64/intr.c:560 Xintr_ioapic_edge23_untramp() at Xintr_ioapic_edge23_untramp+0x18f end of kernel end trace frame: 0x71158b963fe0, count: -9 ddb{0}> machine ddbcpu 1 Stopped at db_enter+0x25: addq $0x8,%rsp ddb{1}> trace db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 witness_checkorder(fffffd806e7b80f0,9,0) at witness_checkorder+0x10d1 sys/kern/subr_witness.c:-1 rw_do_enter_write(fffffd806e7b80d8,1) at rw_do_enter_write+0xba sys/kern/kern_rwlock.c:234 rrw_enter(fffffd806e7b80d8,1) at rrw_enter+0xc6 sys/kern/kern_rwlock.c:621 VOP_LOCK(fffffd806e7bb480,2001) at VOP_LOCK+0xbd sys/kern/vfs_vops.c:527 vn_lock(fffffd806e7bb480,2001) at vn_lock+0xa4 sys/kern/vfs_vnops.c:570 vn_closefile(fffffd806c742d70,ffff8000fffe8550) at vn_closefile+0x111 vn_close sys/kern/vfs_vnops.c:292 [inline] vn_closefile(fffffd806c742d70,ffff8000fffe8550) at vn_closefile+0x111 sys/kern/vfs_vnops.c:615 fdrop(fffffd806c742d70,ffff8000fffe8550) at fdrop+0x121 sys/kern/kern_descrip.c:1280 knote_drop(fffffd806c464180,ffff8000fffe8550) at knote_drop+0x1a1 sys/kern/kern_event.c:2296 knote_remove(ffff8000fffe8550,fffffd806f65f000,fffffd806f65f090,3,0) at knote_remove+0x215 sys/kern/kern_event.c:-1 knote_fdclose(ffff8000fffe8550,3) at knote_fdclose+0xf9 sys/kern/kern_event.c:2203 fdrelease(ffff8000fffe8550,3) at fdrelease+0xf9 sys/kern/kern_descrip.c:760 syscall(ffff80003c3ecc10) at syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003c3ecc10) at syscall+0xbd4 sys/arch/amd64/amd64/trap.c:775 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xcabb6a38560, count: -14