witness: lock order reversal: 1st 0xffff8000ffff0ac0 fdlock (&newfdp->fd_fd.fd_lock) 2nd 0xfffffd806ff97e98 inode (&ip->i_lock) lock order [1] fdlock (&newfdp->fd_fd.fd_lock) -> [2] inode (&ip->i_lock) lock order data 0xffffffff8338a33b -> 0xffffffff8337ffd2 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:765 #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:765 #6 Xsyscall+0x128 Stopped at db_enter+0x25: addq $0x8,%rsp ddb{0}> ddb{0}> set $lines = 0 ddb{0}> set $maxwidth = 0 ddb{0}> show panic the kernel did not panic ddb{0}> trace db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 witness_checkorder(fffffd806ff97e98,9,0) at witness_checkorder+0x10b9 sys/kern/subr_witness.c:-1 rw_do_enter_write(fffffd806ff97e80,1) at rw_do_enter_write+0xba sys/kern/kern_rwlock.c:234 rrw_enter(fffffd806ff97e80,1) at rrw_enter+0xc6 sys/kern/kern_rwlock.c:621 VOP_LOCK(fffffd80700a6010,2001) at VOP_LOCK+0xa3 sys/kern/vfs_vops.c:527 vn_lock(fffffd80700a6010,2001) at vn_lock+0xa4 sys/kern/vfs_vnops.c:570 vn_closefile(fffffd806d38fde8,ffff800034bf8028) at vn_closefile+0x111 vn_close sys/kern/vfs_vnops.c:292 [inline] vn_closefile(fffffd806d38fde8,ffff800034bf8028) at vn_closefile+0x111 sys/kern/vfs_vnops.c:615 fdrop(fffffd806d38fde8,ffff800034bf8028) at fdrop+0x121 sys/kern/kern_descrip.c:1280 knote_remove(ffff800034bf8028,fffffd806f8d80e0,fffffd806f8d8170,3,0) at knote_remove+0x449 sys/kern/kern_event.c:2168 knote_fdclose(ffff800034bf8028,3) at knote_fdclose+0xf9 sys/kern/kern_event.c:2203 fdrelease(ffff800034bf8028,3) at fdrelease+0xf9 sys/kern/kern_descrip.c:760 syscall(ffff80003c45b560) at syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003c45b560) at syscall+0xbd4 sys/arch/amd64/amd64/trap.c:765 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xcb9c6c8d620, count: -13 ddb{0}> show registers rdi 0 rsi 0x80000 acpi_pdirpa+0x6be71 rbp 0xffff80003c45b070 rbx 0 rdx 0xffff8000014507c0 rcx 0xffff800034bf8028 rax 0x7ffff acpi_pdirpa+0x6be70 r8 0xffff80003c45af50 r9 0x8080808080808080 r10 0x70e479d451a7ea71 r11 0xba574d0be86c28d6 r12 0xfffffd8003f40d00 r13 0xfffffd800472d1b8 r14 0x3 r15 0xffffffff834145c3 substchar+0x7bc8 rip 0xffffffff82bb41e5 db_enter+0x25 cs 0x8 rflags 0x246 rsp 0xffff80003c45b060 ss 0x10 db_enter+0x25: addq $0x8,%rsp ddb{0}> show proc PROC (syz-executor) tid=518254 pid=38777 tcnt=4 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=0xffff800034bf82c0,0xffff800034bf02c8 process=0xffff8000fffe9830 user=0xffff80003c456000, vmspace=0xfffffd805fd279b0 estcpu=36, cpticks=0, pctcpu=0.0, user=0, sys=0, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND 12337 189796 57680 0 7 0 syz-executor 12337 28119 57680 0 3 0x4000080 fsleep syz-executor 6234 201471 51877 0 2 0 syz-executor 6234 331682 51877 0 3 0x4000080 fsleep syz-executor 46845 5659 69090 0 2 0 syz-executor 46845 399299 69090 0 3 0x4000080 fsleep syz-executor 61726 376765 27782 0 2 0 syz-executor 61726 441230 27782 0 3 0x4000000 biowait syz-executor 61726 204049 27782 0 3 0x4000000 inode syz-executor 61726 113575 27782 0 3 0x4000000 inode syz-executor 38777 141577 79092 0 2 0 syz-executor *38777 518254 79092 0 7 0x4000000 syz-executor 38777 495138 79092 0 3 0x4000080 fsleep syz-executor 38777 239532 79092 0 3 0x4000080 fsleep syz-executor 64621 368950 79181 0 3 0x80 nanoslp syz-executor 64621 103310 79181 0 3 0x4000080 lockf syz-executor 64621 192428 79181 0 3 0x4000080 lockf syz-executor 64621 27496 79181 0 3 0x4000080 fsleep syz-executor 30554 119708 4411 0 2 0 syz-executor 30554 88992 4411 0 3 0x4000080 lockf syz-executor 30554 251873 4411 0 3 0x4000080 fsleep syz-executor 8813 379668 0 0 3 0x14200 acct acct 19821 132751 29540 0 3 0x82 nanoslp syz-executor 51877 370264 29540 0 3 0x82 nanoslp syz-executor 69090 161068 29540 0 3 0x82 nanoslp syz-executor 57680 371457 29540 0 3 0x82 nanoslp syz-executor 4411 381705 29540 0 3 0x82 nanoslp syz-executor 79092 39909 29540 0 3 0x82 nanoslp syz-executor 27782 453555 29540 0 3 0x82 nanoslp syz-executor 79181 441031 29540 0 3 0x82 nanoslp syz-executor 29540 187366 3281 0 3 0x82 kqread syz-executor 3281 146064 64454 0 3 0x10008a sigsusp ksh 64454 516280 75759 0 3 0x98 kqread sshd-session 75759 503167 75112 0 3 0x92 kqread sshd-session 50152 168696 1 0 3 0x100083 ttyin getty 75112 400159 1 0 3 0x88 kqread sshd 478 283047 49979 74 3 0x1100092 bpf pflogd 49979 374360 1 0 3 0x80 sbwait pflogd 8545 459237 38353 73 3 0x1100090 kqread syslogd 38353 448052 1 0 3 0x100082 sbwait syslogd 52335 479495 1 0 3 0x100080 kqread resolvd 98399 31413 16078 77 3 0x100092 kqread dhcpleased 33505 371363 16078 77 3 0x100092 kqread dhcpleased 16078 166892 1 0 3 0x80 kqread dhcpleased 89981 41316 0 0 3 0x14200 bored smr 10276 437521 0 0 2 0x14200 zerothread 77240 491465 0 0 3 0x14200 aiodoned aiodoned 98663 82088 0 0 3 0x14200 syncer update 63681 60600 0 0 3 0x14200 cleaner cleaner 86140 445481 0 0 3 0x14200 reaper reaper 11972 480406 0 0 3 0x14200 pgdaemon pagedaemon 97097 18897 0 0 3 0x14200 bored viomb 47109 293824 0 0 3 0x40014200 acpi0 acpi0 97874 282635 0 0 3 0x40014200 idle1 40077 431488 0 0 3 0x14200 bored softnet1 67923 458360 0 0 3 0x14200 bored softnet0 70419 488765 0 0 3 0x14200 bored systqmp 70680 244694 0 0 3 0x14200 bored systq 41376 223132 0 0 3 0x14200 tmoslp softclockmp 26144 135226 0 0 3 0x40014200 tmoslp softclock 38987 389482 0 0 3 0x40014200 idle0 1 86783 0 0 3 0x82 wait init 0 0 -1 0 3 0x10010200 scheduler swapper ddb{0}> show all locks Process 12337 (syz-executor) thread 0xffff800034bf8a88 (189796) exclusive rwlock uobjlk r = 0 (0xfffffd806c99b5c8) #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 uvm_fault+0x1e5 sys/uvm/uvm_fault.c:655 #3 upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:192 #4 usertrap+0x42f sys/arch/amd64/amd64/trap.c:622 #5 recall_trap+0x8 shared rwlock vmmaplk r = 0 (0xfffffd805fd27310) #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_read+0x3e8 sys/kern/kern_rwlock.c:413 #2 uvmfault_lookup+0x122 sys/uvm/uvm_fault.c:1902 #3 uvm_fault_check+0x4f sys/uvm/uvm_fault.c:699 #4 uvm_fault+0x106 sys/uvm/uvm_fault.c:633 #5 upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:192 #6 usertrap+0x42f sys/arch/amd64/amd64/trap.c:622 #7 recall_trap+0x8 Process 61726 (syz-executor) thread 0xffff800034bf9780 (441230) exclusive rrwlock inode r = 0 (0xfffffd806cb078f8) #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+0xa3 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:765 #9 Xsyscall+0x128 Process 61726 (syz-executor) thread 0xffff800034bf8558 (204049) exclusive rrwlock inode r = 0 (0xfffffd806ea54790) #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+0xa3 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 sys_truncate+0x84 sys/kern/vfs_syscalls.c:2884 #8 syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] #8 syscall+0xb17 sys/arch/amd64/amd64/trap.c:765 #9 Xsyscall+0x128 Process 38777 (syz-executor) thread 0xffff800034bf8028 (518254) exclusive kernel_lock &kernel_lock r = 0 (0xffffffff83a0a408) #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_remove+0x449 sys/kern/kern_event.c:2168 #4 knote_fdclose+0xf9 sys/kern/kern_event.c:2203 #5 fdrelease+0xf9 sys/kern/kern_descrip.c:760 #6 syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline] #6 syscall+0xbd4 sys/arch/amd64/amd64/trap.c:765 #7 Xsyscall+0x128 exclusive rwlock fdlock r = 0 (0xffff8000ffff0ac0) #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:765 #4 Xsyscall+0x128 ddb{0}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10209 11028K 11262K 166960K 12018 0 pcb 17 12K 12K 166960K 114 0 rtable 156 7K 8K 166960K 484 0 pf 32 17K 19K 166960K 106 0 ifaddr 30 5K 7K 166960K 78 0 ifgroup 47 2K 2K 166960K 135 0 sysctl 1 1K 9K 166960K 5 0 counters 64 36K 37K 166960K 120 0 ioctlops 0 0K 4K 166960K 1568 0 iov 0 0K 12K 166960K 36 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1338 84K 84K 166960K 1892 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 5K 166960K 7 0 VM map 2 1K 1K 166960K 2 0 sem 6 0K 0K 166960K 8 0 dirhash 12 2K 2K 166960K 24 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 18 65K 110K 166960K 1363 0 sigio 0 0K 0K 166960K 17 0 proc 72 115K 147K 166960K 620 0 subproc 72 4K 4K 166960K 81 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 80 0 in_multi 54 3K 7K 166960K 140 0 ether_multi 1 0K 0K 166960K 11 0 mrt 1 0K 0K 166960K 10 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 115 519K 519K 166960K 115 0 exec 0 0K 1K 166960K 452 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 265 160K 179K 166960K 12779 0 UVM aobj 5 6K 6K 166960K 6 0 pinsyscall 43 86K 102K 166960K 2506 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 24 0 NDP 10 0K 2K 166960K 52 0 temp 46 8668K 8828K 166960K 29820 0 kqueue 14 22K 26K 166960K 166 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 26 0 0 1 0 1 1 0 8 0 rtpcb 120 60 0 57 1 0 1 1 0 8 0 rtentry 176 139 0 80 6 0 6 6 0 8 1 unpcb 144 315 0 296 1 0 1 1 0 8 0 syncache 336 3 0 3 1 1 0 1 0 8 0 tcpcb 736 87 0 83 1 0 1 1 0 8 0 arp 136 22 0 11 1 0 1 1 0 8 0 inpcb 328 390 0 383 1 0 1 1 0 8 0 nd6 152 30 0 17 1 0 1 1 0 8 0 pkpcb 40 1 0 1 1 1 0 1 0 8 0 kcovpl 48 9 0 1 1 0 1 1 0 8 0 ppxss 1192 13 0 13 2 1 1 1 0 8 1 pppxif 1504 2 0 2 1 0 1 1 0 8 1 pffrag 232 9 0 1 1 0 1 1 0 482 0 pffrnode 88 8 0 0 1 0 1 1 0 8 0 pffrent 40 12 0 4 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 pfrktable 1344 3 0 3 1 0 1 1 0 8 1 pfstitem 24 46 0 13 1 0 1 1 0 8 0 pfstkey 128 46 0 13 2 0 2 2 0 8 0 pfstate 448 46 0 13 5 0 5 5 0 8 1 pfrule 1344 25 0 20 2 1 1 2 0 8 0 art_heap8 4096 3 0 0 3 0 3 3 0 8 0 art_heap4 256 604 0 340 29 4 25 29 0 8 6 art_table 40 607 0 340 5 0 5 5 0 8 0 art_node 32 138 0 88 1 0 1 1 0 8 0 sysvmsgpl 40 11 0 4 1 0 1 1 0 8 0 semupl 112 1 0 1 1 1 0 1 0 8 0 semapl 112 5 0 1 1 0 1 1 0 8 0 dirhash 1024 25 0 8 3 0 3 3 0 8 0 dino2pl 256 3427 0 1918 95 0 95 95 0 8 0 ffsino 296 3427 0 1918 117 0 117 117 0 8 0 nchpl 144 4982 0 3279 64 0 64 64 0 8 0 rtmask 32 1 0 1 1 0 1 1 0 8 1 vnodes 216 3757 0 0 209 0 209 209 0 8 0 namei 1024 13183 0 13182 1 0 1 1 0 8 0 percpumem 16 75 0 28 1 0 1 1 0 8 0 vcpupl 3968 2 0 0 1 0 1 1 0 8 0 vmpool 840 3 0 1 1 0 1 1 0 8 0 kstatmem 264 72 0 48 3 1 2 3 0 8 0 scsiplug 72 7 0 7 1 0 1 1 0 8 1 scxspl 216 17274 0 17273 10 2 8 8 1 8 7 plimitpl 152 109 0 90 1 0 1 1 0 8 0 sigapl 424 1664 0 1615 7 1 6 7 0 8 0 knotepl 120 497 0 0 16 0 16 16 0 8 0 kqueuepl 224 165 0 154 1 0 1 1 0 8 0 pipepl 344 145 0 118 3 0 3 3 0 8 0 fdescpl 528 1646 0 1614 3 0 3 3 0 8 0 filepl 160 4723 0 4497 10 0 10 10 0 8 0 lockfpl 104 269 0 259 1 0 1 1 0 8 0 lockfspl 48 105 0 101 1 0 1 1 0 8 0 sessionpl 144 23 0 14 1 0 1 1 0 8 0 pgrppl 48 39 0 22 1 0 1 1 0 8 0 ucredpl 104 756 0 743 1 0 1 1 0 8 0 zombiepl 144 1616 0 1615 1 0 1 1 0 8 0 processpl 1232 1664 0 1615 5 0 5 5 0 8 0 procpl 664 3062 0 2999 6 0 6 6 0 8 0 sockpl 752 773 0 744 4 0 4 4 0 8 1 mcl64k 65536 18 0 0 3 0 3 3 0 8 0 mcl16k 16384 17 0 0 3 0 3 3 0 8 0 mcl12k 12288 18 0 0 2 0 2 2 0 8 0 mcl9k 9216 8 0 0 1 0 1 1 0 8 0 mcl8k 8192 13 0 0 2 0 2 2 0 8 0 mcl4k 4096 130 0 0 17 0 17 17 0 8 0 mcl2k2 2112 1 0 0 1 0 1 1 0 8 0 mcl2k 2048 30 0 0 4 0 4 4 0 8 0 mtagpl 96 11 0 0 1 0 1 1 0 8 0 mbufpl 256 1154 0 0 73 0 73 73 0 8 0 bufpl 280 5161 0 135 359 0 359 359 0 8 0 anonpl 32 7652 0 0 62 0 62 62 0 246 0 amapchunkpl 152 44307 0 43745 36 10 26 36 0 158 4 amappl16 200 4987 0 4920 20 8 12 15 0 8 7 amappl15 192 7 0 7 1 1 0 1 0 8 0 amappl14 184 5 0 5 1 1 0 1 0 8 0 amappl13 176 444 0 443 1 0 1 1 0 8 0 amappl12 168 2010 0 1967 3 0 3 3 0 8 0 amappl11 160 18 0 17 1 0 1 1 0 8 0 amappl10 152 50 0 36 1 0 1 1 0 8 0 amappl9 144 254 0 254 1 1 0 1 0 8 0 amappl8 136 30 0 28 1 0 1 1 0 8 0 amappl7 128 83 0 82 1 0 1 1 0 8 0 amappl6 120 282 0 269 1 0 1 1 0 8 0 amappl5 112 78 0 68 1 0 1 1 0 8 0 amappl4 104 428 0 399 1 0 1 1 0 8 0 amappl3 96 7821 0 7713 4 1 3 3 0 8 0 amappl2 88 1745 0 1669 2 0 2 2 0 8 0 amappl1 80 14296 0 13699 14 1 13 14 0 8 0 amappl 88 11954 0 11766 5 0 5 5 0 92 0 uvmvnodes 80 128 0 0 3 0 3 3 0 8 0 dma65536 65536 2 0 2 2 1 1 1 0 8 1 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 128 255 0 255 3 2 1 1 0 8 1 dma64 64 6 0 6 1 1 0 1 0 8 0 dma32 32 8 0 8 2 1 1 1 0 8 1 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 1646 0 1614 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 1646 0 1614 1 0 1 1 0 8 0 vmmpekpl 168 12349 0 12309 3 0 3 3 0 8 0 vmmpepl 168 105107 0 103066 97 2 95 97 0 357 6 vmsppl 488 1645 0 1614 6 2 4 5 0 8 0 rwobjpl 80 27559 0 26434 27 0 27 27 0 8 1 pdppl 4096 3305 0 3232 99 26 73 83 0 8 0 pvpl 32 15728 0 0 127 0 127 127 0 265 0 pmappl 256 1648 0 1615 3 0 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 347 0 34 9 0 9 9 0 8 0 ddb{0}> machine ddbcpu 0 Invalid cpu 0 ddb{0}> trace db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 witness_checkorder(fffffd806ff97e98,9,0) at witness_checkorder+0x10b9 sys/kern/subr_witness.c:-1 rw_do_enter_write(fffffd806ff97e80,1) at rw_do_enter_write+0xba sys/kern/kern_rwlock.c:234 rrw_enter(fffffd806ff97e80,1) at rrw_enter+0xc6 sys/kern/kern_rwlock.c:621 VOP_LOCK(fffffd80700a6010,2001) at VOP_LOCK+0xa3 sys/kern/vfs_vops.c:527 vn_lock(fffffd80700a6010,2001) at vn_lock+0xa4 sys/kern/vfs_vnops.c:570 vn_closefile(fffffd806d38fde8,ffff800034bf8028) at vn_closefile+0x111 vn_close sys/kern/vfs_vnops.c:292 [inline] vn_closefile(fffffd806d38fde8,ffff800034bf8028) at vn_closefile+0x111 sys/kern/vfs_vnops.c:615 fdrop(fffffd806d38fde8,ffff800034bf8028) at fdrop+0x121 sys/kern/kern_descrip.c:1280 knote_remove(ffff800034bf8028,fffffd806f8d80e0,fffffd806f8d8170,3,0) at knote_remove+0x449 sys/kern/kern_event.c:2168 knote_fdclose(ffff800034bf8028,3) at knote_fdclose+0xf9 sys/kern/kern_event.c:2203 fdrelease(ffff800034bf8028,3) at fdrelease+0xf9 sys/kern/kern_descrip.c:760 syscall(ffff80003c45b560) at syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003c45b560) at syscall+0xbd4 sys/arch/amd64/amd64/trap.c:765 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xcb9c6c8d620, count: -13 ddb{0}> machine ddbcpu 1 Stopped at x86_ipi_db+0x27: addq $0x8,%rsp ddb{1}> trace x86_ipi_db(ffff8000299edff0) 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 __mp_lock(ffffffff83a0a200) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:134 [inline] __mp_lock(ffffffff83a0a200) at __mp_lock+0x192 sys/kern/kern_lock.c:165 uvm_fault(fffffd805fd27210,34baac49000,0,2) at uvm_fault+0x1ea sys/uvm/uvm_fault.c:656 upageflttrap(ffff80002fbdc900,34baac49ff0) at upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:192 usertrap(ffff80002fbdc900) at usertrap+0x42f sys/arch/amd64/amd64/trap.c:622 recall_trap() at recall_trap+0x8 end of kernel end trace frame: 0x74073166c3a0, count: -8