login: witness: lock order reversal: 1st 0xffff800010fd66c8 sbufrcv (&so->so_rcv.sb_lock) 2nd 0xfffffd806b878a78 inode (&ip->i_lock) lock order [1] sbufrcv (&so->so_rcv.sb_lock) -> [2] inode (&ip->i_lock) lock order data 0xffffffff834385bd -> 0xffffffff833a5512 is missing lock order [2] inode (&ip->i_lock) -> [1] sbufrcv (&so->so_rcv.sb_lock) #0 rw_do_enter_write+0xb7 sys/kern/kern_rwlock.c:233 #1 sblock+0xb7 sys/kern/uipc_socket2.c:536 #2 soreceive+0x28e sys/kern/uipc_socket.c:882 #3 fifo_read+0x11a sys/miscfs/fifofs/fifo_vnops.c:264 #4 VOP_READ+0x102 sys/kern/vfs_vops.c:227 #5 vn_rdwr+0x15b #6 vndsetcred+0xa1 sys/dev/vnd.c:684 #7 vndioctl+0xe6c sys/dev/vnd.c:485 #8 VOP_IOCTL+0xac sys/kern/vfs_vops.c:264 #9 vn_ioctl+0xf8 sys/kern/vfs_vnops.c:531 #10 sys_ioctl+0x5c3 #11 syscall+0xbc6 mi_syscall sys/sys/syscall_mi.h:176 [inline] #11 syscall+0xbc6 sys/arch/amd64/amd64/trap.c:577 #12 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(fffffd806b878a78,9,0) at witness_checkorder+0x1047 rw_do_enter_write(fffffd806b878a60,1) at rw_do_enter_write+0xb7 sys/kern/kern_rwlock.c:233 rrw_enter(fffffd806b878a60,1) at rrw_enter+0xc6 sys/kern/kern_rwlock.c:616 VOP_LOCK(fffffd805f226708,2001) at VOP_LOCK+0xa6 sys/kern/vfs_vops.c:524 vn_lock(fffffd805f226708,2001) at vn_lock+0xa4 sys/kern/vfs_vnops.c:570 vfs_getcwd_common(fffffd805f226708,fffffd805f226708,0,0,200,0,a6d5853c8003ed67) at vfs_getcwd_common+0xd1 sys/kern/vfs_getcwd.c:287 vn_isunder(fffffd805f226708,fffffd805f226708,ffff80003c4d62b8) at vn_isunder+0x56 sys/kern/vfs_vnops.c:694 unp_externalize(fffffd806cad3200,33,0) at unp_externalize+0x286 sys/kern/uipc_usrreq.c:1086 soreceive(ffff800010fd65e8,ffff80003c4e3588,ffff80003c4e3538,0,ffff80003c4e3578,ffff80003c4e36fc,520c008d381a7512) at soreceive+0xc73 sys/kern/uipc_socket.c:1021 recvit(ffff80003c4d62b8,4,ffff80003c4e36d0,0,ffff80003c4e3780) at recvit+0x40a sys/kern/uipc_syscalls.c:1072 sys_recvmsg(ffff80003c4d62b8,ffff80003c4e3830,ffff80003c4e3780) at sys_recvmsg+0x1bf sys/kern/uipc_syscalls.c:872 syscall(ffff80003c4e3830) at syscall+0xbc6 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003c4e3830) at syscall+0xbc6 sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xe92239e5770, count: -14 ddb{1}> show registers rdi 0 rsi 0x80000 acpi_pdirpa+0x6be71 rbp 0xffff80003c4e3010 rbx 0xfffffd800470e2b8 rdx 0xffff800001438c00 rcx 0xffff80003c4d62b8 rax 0x7ffff acpi_pdirpa+0x6be70 r8 0xffff80003c4e2ef0 r9 0x8080808080808080 r10 0x98ea111693834948 r11 0x30a92ba0422c5f30 r12 0 r13 0xfffffd8003f24f00 r14 0x3 r15 0xffffffff rip 0xffffffff810240e5 db_enter+0x25 cs 0x8 rflags 0x246 rsp 0xffff80003c4e3000 ss 0x10 db_enter+0x25: addq $0x8,%rsp ddb{1}> show proc PROC (syz-executor) tid=385465 pid=88881 tcnt=2 stat=onproc flags process=1000000 proc=4000000 runpri=32, usrpri=50, slppri=32, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff80003c4d6a68,0xffffffff839eb828 process=0xffff8000ffff44b8 user=0xffff80003c4de000, vmspace=0xfffffd806beaeac8 estcpu=36, cpticks=0, pctcpu=0.0, user=0, sys=0, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 88881 247183 79006 0 7 0x1000000 syz-executor *88881 385465 79006 0 7 0x5000000 syz-executor 79224 374845 58747 0 3 0x3000 suspend syz-executor 79224 463138 58747 0 3 0x4081000 smrbar syz-executor 9623 118684 86852 0 3 0x80 nanoslp syz-executor 9623 320911 86852 0 3 0x4000080 netcon syz-executor 9623 213732 86852 0 3 0x4000080 fsleep syz-executor 98498 235760 35738 0 3 0x80 nanoslp syz-executor 98498 102599 35738 0 2 0x4000000 syz-executor 98498 166865 35738 0 3 0x4000080 fsleep syz-executor 12510 101396 67682 0 3 0x80 nanoslp syz-executor 12510 82281 67682 0 3 0x4000000 biowait syz-executor 55038 404442 55599 0 3 0x80 nanoslp syz-executor 55038 150863 55599 0 3 0x4000080 sbwait syz-executor 55038 59722 55599 0 3 0x4000080 fsleep syz-executor 97076 135360 75139 0 3 0x80 nanoslp syz-executor 97076 6173 75139 0 3 0x4000080 kqsel syz-executor 97076 127684 75139 0 3 0x4000080 fsleep syz-executor 70483 137100 39038 0 3 0x80 nanoslp syz-executor 70483 227524 39038 0 3 0x4000080 msgwait syz-executor 70483 255958 39038 0 3 0x4000080 fsleep syz-executor 33452 174172 1 0 3 0x100083 ttyin getty 21564 38589 0 0 3 0x14200 bored sosplice 86852 430771 41681 0 3 0x82 nanoslp syz-executor 67682 81651 41681 0 3 0x82 nanoslp syz-executor 58747 386871 41681 0 3 0x82 nanoslp syz-executor 35738 24182 41681 0 3 0x82 nanoslp syz-executor 39038 299466 41681 0 3 0x82 nanoslp syz-executor 55599 523587 41681 0 3 0x82 nanoslp syz-executor 75139 482209 41681 0 3 0x82 nanoslp syz-executor 79006 492093 41681 0 3 0x82 nanoslp syz-executor 41681 91509 26958 0 3 0x82 kqread syz-executor 26958 195215 13591 0 3 0x10008a sigsusp ksh 13591 329110 85820 0 3 0x98 kqread sshd-session 85820 58646 87336 0 3 0x92 kqread sshd-session 87336 179877 1 0 3 0x88 kqread sshd 37402 394133 41935 74 3 0x1100092 bpf pflogd 41935 307304 1 0 3 0x80 sbwait pflogd 20804 271765 18395 73 3 0x1100090 kqread syslogd 18395 468102 1 0 3 0x100082 sbwait syslogd 85859 118286 1 0 3 0x100080 kqread resolvd 66914 100520 45185 77 3 0x100092 kqread dhcpleased 23436 98608 45185 77 3 0x100092 kqread dhcpleased 45185 374101 1 0 3 0x80 kqread dhcpleased 17261 294655 0 0 3 0x14200 bored smr 83748 283812 0 0 3 0x14200 pgzero zerothread 22879 285096 0 0 3 0x14200 aiodoned aiodoned 8115 316105 0 0 3 0x14200 syncer update 63912 508261 0 0 3 0x14200 cleaner cleaner 229 295859 0 0 3 0x14200 reaper reaper 1714 57201 0 0 3 0x14200 pgdaemon pagedaemon 33617 400597 0 0 3 0x14200 bored viomb 70400 307050 0 0 3 0x40014200 acpi0 acpi0 11976 371215 0 0 3 0x40014200 idle1 64813 442747 0 0 3 0x14200 bored softnet3 34731 405004 0 0 3 0x14200 bored softnet2 68625 376486 0 0 3 0x14200 bored softnet1 35119 88260 0 0 2 0x14200 softnet0 62858 295514 0 0 3 0x14200 bored systqmp 4573 395542 0 0 3 0x14200 syncxs systq 27415 292657 0 0 3 0x14200 tmoslp softclockmp 41230 274038 0 0 3 0x40014200 tmoslp softclock 65474 135235 0 0 3 0x40014200 idle0 1 279119 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{1}> show all locks Process 88881 (syz-executor) thread 0xffff80003c4d62b8 (385465) exclusive kernel_lock &kernel_lock r = 0 (0xffffffff83906af8) #0 witness_lock+0x5bb stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5bb sys/kern/subr_witness.c:1155 #1 unp_externalize+0x14e #2 soreceive+0xc73 sys/kern/uipc_socket.c:1021 #3 recvit+0x40a sys/kern/uipc_syscalls.c:1072 #4 sys_recvmsg+0x1bf sys/kern/uipc_syscalls.c:872 #5 syscall+0xbc6 mi_syscall sys/sys/syscall_mi.h:176 [inline] #5 syscall+0xbc6 sys/arch/amd64/amd64/trap.c:577 #6 Xsyscall+0x128 exclusive rwlock sbufrcv r = 0 (0xffff800010fd66c8) #0 witness_lock+0x5bb stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5bb sys/kern/subr_witness.c:1155 #1 rw_do_enter_write+0x3ea sys/kern/kern_rwlock.c:316 #2 sblock+0xb7 sys/kern/uipc_socket2.c:536 #3 soreceive+0x28e sys/kern/uipc_socket.c:882 #4 recvit+0x40a sys/kern/uipc_syscalls.c:1072 #5 sys_recvmsg+0x1bf sys/kern/uipc_syscalls.c:872 #6 syscall+0xbc6 mi_syscall sys/sys/syscall_mi.h:176 [inline] #6 syscall+0xbc6 sys/arch/amd64/amd64/trap.c:577 #7 Xsyscall+0x128 Process 79224 (syz-executor) thread 0xffff8000ffffd490 (463138) exclusive rwlock clonelk r = 0 (0xffffffff837eadd8) #0 witness_lock+0x5bb stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5bb sys/kern/subr_witness.c:1155 #1 rw_do_enter_write+0x3ea sys/kern/kern_rwlock.c:316 #2 if_clone_destroy+0x67 #3 ifioctl+0x5c5 #4 sys_ioctl+0x5c3 #5 syscall+0xbc6 mi_syscall sys/sys/syscall_mi.h:176 [inline] #5 syscall+0xbc6 sys/arch/amd64/amd64/trap.c:577 #6 Xsyscall+0x128 Process 12510 (syz-executor) thread 0xffff80002a346f80 (82281) exclusive rrwlock inode r = 0 (0xfffffd806bd950e0) #0 witness_lock+0x5bb stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5bb sys/kern/subr_witness.c:1155 #1 rw_do_enter_write+0x3ea sys/kern/kern_rwlock.c:316 #2 rrw_enter+0xc6 sys/kern/kern_rwlock.c:616 #3 VOP_LOCK+0xa6 sys/kern/vfs_vops.c:524 #4 vn_lock+0xa4 sys/kern/vfs_vnops.c:570 #5 vn_write+0x190 sys/kern/vfs_vnops.c:405 #6 dofilewritev+0x23c sys/kern/sys_generic.c:380 #7 sys_write+0xa2 sys/kern/sys_generic.c:300 #8 syscall+0xbc6 mi_syscall sys/sys/syscall_mi.h:176 [inline] #8 syscall+0xbc6 sys/arch/amd64/amd64/trap.c:577 #9 Xsyscall+0x128 Process 4573 (systq) thread 0xffff8000ffffe520 (395542) shared rwlock systq r = 0 (0xffffffff83883070) #0 witness_lock+0x5bb stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5bb sys/kern/subr_witness.c:1155 #1 taskq_thread+0x12a sys/kern/kern_task.c:442 #2 proc_trampoline+0x10 ddb{1}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10206 11159K 12529K 166960K 12440 0 pcb 18 15K 17K 166960K 184 0 rtable 236 7K 8K 166960K 433 0 pf 35 17K 20K 166960K 124 0 ifaddr 42 7K 9K 166960K 80 0 ifgroup 51 2K 2K 166960K 130 0 sysctl 4 1K 1K 166960K 4 0 counters 62 36K 37K 166960K 122 0 ioctlops 0 0K 4K 166960K 1591 0 iov 1 4K 22K 166960K 49 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1457 92K 92K 166960K 2083 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 5K 166960K 14 0 VM map 2 1K 1K 166960K 2 0 sem 12 10K 10K 166960K 26 0 dirhash 12 2K 3K 166960K 33 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 18 65K 93K 166960K 793 0 sigio 1 0K 0K 166960K 9 0 proc 72 91K 140K 166960K 610 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 76 0 in_multi 91 6K 7K 166960K 128 0 ether_multi 1 0K 0K 166960K 6 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 490 0 fusefs mount 1 32K 32K 166960K 1 0 pfkey data 0 0K 0K 166960K 2 0 tdb 3 0K 0K 166960K 3 0 VM swap 8 62K 64K 166960K 10 0 UVM amap 251 73K 88K 166960K 8949 0 UVM aobj 16 2K 4K 166960K 19 0 pinsyscall 43 86K 104K 166960K 1888 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 34 0 NDP 11 0K 2K 166960K 49 0 temp 79 8648K 8770K 166960K 33500 0 kqueue 19 29K 31K 166960K 156 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 vscsiccb 40 1 0 0 1 0 1 1 0 8 0 plcache 128 24 0 0 1 0 1 1 0 8 0 rtpcb 120 85 0 82 1 0 1 1 0 8 0 rtentry 112 135 0 28 4 0 4 4 0 8 0 unpcb 144 682 0 654 8 4 4 6 0 8 2 syncache 336 5 0 5 1 1 0 1 0 8 0 tcpqe 32 3 0 3 1 1 0 1 0 8 0 tcpcb 808 237 0 227 8 6 2 8 0 8 0 arp 120 24 0 4 1 0 1 1 0 8 0 inpcb 376 910 0 834 18 10 8 13 0 8 0 nd6 136 26 0 4 1 0 1 1 0 8 0 pkpcb 40 5 0 5 1 0 1 1 0 8 1 kcovpl 48 8 0 0 1 0 1 1 0 8 0 mppekey 1024 1 0 1 1 0 1 1 0 8 1 ppxss 1168 17 0 17 1 0 1 1 0 8 1 pppxif 1472 7 0 7 2 1 1 1 0 8 1 pfstscr 40 8 0 8 1 0 1 1 0 8 1 pffrag 232 3 0 2 1 0 1 1 0 482 0 pffrnode 88 3 0 2 1 0 1 1 0 8 0 pffrent 40 9 0 8 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 67 0 14 1 0 1 1 0 8 0 pfstkey 128 86 0 33 2 0 2 2 0 8 0 pfstate 376 74 0 23 6 0 6 6 0 8 0 pfrule 1344 37 0 32 2 1 1 2 0 8 0 art_heap8 4096 2 0 0 2 0 2 2 0 8 0 art_heap4 256 499 0 85 30 0 30 30 0 8 1 art_table 32 501 0 85 4 0 4 4 0 8 0 art_node 16 132 0 40 1 0 1 1 0 8 0 sysvmsgpl 40 26 0 15 1 0 1 1 0 8 0 semapl 112 21 0 11 1 0 1 1 0 8 0 shmpl 112 16 0 3 1 0 1 1 0 8 0 dirhash 1024 31 0 14 3 0 3 3 0 8 0 dino2pl 256 2932 0 1425 95 0 95 95 0 8 0 ffsino 280 2932 0 1425 109 0 109 109 0 8 0 nchpl 144 4080 0 2387 63 0 63 63 0 8 0 uvmvnodes 80 3450 0 0 71 0 71 71 0 8 0 vnodes 216 3450 0 0 192 0 192 192 0 8 0 namei 1024 13279 0 13279 1 0 1 1 0 8 1 percpumem 16 75 0 30 1 0 1 1 0 8 0 kstatmem 264 66 0 44 2 0 2 2 0 8 0 scxspl 216 12766 0 12764 10 9 1 8 1 8 0 plimitpl 152 134 0 114 1 0 1 1 0 8 0 sigapl 424 1096 0 1045 7 1 6 7 0 8 0 futexpl 64 10331 0 10326 1 0 1 1 0 8 0 knotepl 120 554 0 0 17 0 17 17 0 8 0 kqueuepl 216 316 0 301 5 4 1 5 0 8 0 pipepl 328 212 0 185 5 0 5 5 0 8 2 fdescpl 504 1077 0 1045 5 0 5 5 0 8 0 filepl 152 6619 0 6314 19 6 13 18 0 8 1 lockfpl 104 199 0 196 1 0 1 1 0 8 0 lockfspl 48 86 0 83 1 0 1 1 0 8 0 sessionpl 144 25 0 16 1 0 1 1 0 8 0 pgrppl 48 41 0 24 1 0 1 1 0 8 0 ucredpl 104 936 0 923 1 0 1 1 0 8 0 zombiepl 144 1046 0 1045 1 0 1 1 0 8 0 processpl 1176 1096 0 1045 5 0 5 5 0 8 0 procpl 656 2202 0 2138 7 1 6 7 0 8 0 srpgc 96 4 0 4 1 0 1 1 0 8 1 sosppl 168 3 0 3 1 1 0 1 0 8 0 sockpl 688 1690 0 1583 22 12 10 16 0 8 0 mcl64k 65536 3 0 0 1 0 1 1 0 8 0 mcl9k 9216 1 0 0 1 0 1 1 0 8 0 mcl8k 8192 2 0 0 1 0 1 1 0 8 0 mcl4k 4096 135 0 0 17 0 17 17 0 8 0 mcl2k2 2112 2 0 0 1 0 1 1 0 8 0 mcl2k 2048 25 0 0 4 0 4 4 0 8 0 mtagpl 96 52 0 0 2 0 2 2 0 8 0 mbufpl 256 238 0 0 15 0 15 15 0 8 0 bufpl 280 3870 0 131 268 0 268 268 0 8 0 anonpl 24 151275 0 145157 58 8 50 57 0 184 12 amapchunkpl 152 29397 0 28753 36 4 32 35 0 158 6 amappl16 200 2701 0 2579 20 11 9 17 0 8 1 amappl15 192 28 0 28 1 1 0 1 0 8 0 amappl14 184 115 0 103 1 0 1 1 0 8 0 amappl13 176 4 0 4 1 1 0 1 0 8 0 amappl12 168 1720 0 1688 3 1 2 2 0 8 0 amappl11 160 64 0 49 1 0 1 1 0 8 0 amappl10 152 3 0 3 1 1 0 1 0 8 0 amappl9 144 254 0 254 1 1 0 1 0 8 0 amappl8 136 35 0 32 1 0 1 1 0 8 0 amappl7 128 111 0 98 1 0 1 1 0 8 0 amappl6 120 172 0 168 1 0 1 1 0 8 0 amappl5 112 123 0 113 1 0 1 1 0 8 0 amappl4 104 320 0 300 1 0 1 1 0 8 0 amappl3 96 5696 0 5568 4 0 4 4 0 8 0 amappl2 88 658 0 595 2 0 2 2 0 8 0 amappl1 80 10152 0 9568 14 1 13 14 0 8 0 amappl 88 8525 0 8329 5 0 5 5 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 128 254 0 253 2 1 1 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 18 0 3 1 0 1 1 0 8 0 uaddrrnd 24 1077 0 1045 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 1077 0 1045 1 0 1 1 0 8 0 vmmpekpl 168 10138 0 10102 3 0 3 3 0 8 0 vmmpepl 168 70414 0 68361 97 7 90 97 0 357 0 vmsppl 456 1076 0 1045 5 1 4 5 0 8 0 rwobjpl 64 23836 0 19303 75 1 74 74 0 8 0 pdppl 4096 2161 0 2090 103 32 71 85 0 8 0 pvpl 32 15622 0 0 129 3 126 127 0 265 0 pmappl 248 1076 0 1045 3 0 3 3 0 8 0 extentpl 40 55 0 38 1 0 1 1 0 8 0 phpool 112 291 0 41 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(ffffffff8383aff0) 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(ffffffff839068f0) at __mp_lock+0x199 __mp_lock_spin sys/kern/kern_lock.c:113 [inline] __mp_lock(ffffffff839068f0) at __mp_lock+0x199 sys/kern/kern_lock.c:144 intr_handler(ffff800033caa710,ffff800000069c00) at intr_handler+0xe1 sys/arch/amd64/amd64/intr.c:553 Xintr_ioapic_edge16_untramp() at Xintr_ioapic_edge16_untramp+0x18f __mp_lock(ffffffff839068f0) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:113 [inline] __mp_lock(ffffffff839068f0) at __mp_lock+0x192 sys/kern/kern_lock.c:144 intr_handler(ffff800033caa870,ffff800000079f00) at intr_handler+0xe1 sys/arch/amd64/amd64/intr.c:553 Xintr_ioapic_edge23_untramp() at Xintr_ioapic_edge23_untramp+0x18f end of kernel end trace frame: 0x75723f01f340, 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(fffffd806b878a78,9,0) at witness_checkorder+0x1047 rw_do_enter_write(fffffd806b878a60,1) at rw_do_enter_write+0xb7 sys/kern/kern_rwlock.c:233 rrw_enter(fffffd806b878a60,1) at rrw_enter+0xc6 sys/kern/kern_rwlock.c:616 VOP_LOCK(fffffd805f226708,2001) at VOP_LOCK+0xa6 sys/kern/vfs_vops.c:524 vn_lock(fffffd805f226708,2001) at vn_lock+0xa4 sys/kern/vfs_vnops.c:570 vfs_getcwd_common(fffffd805f226708,fffffd805f226708,0,0,200,0,a6d5853c8003ed67) at vfs_getcwd_common+0xd1 sys/kern/vfs_getcwd.c:287 vn_isunder(fffffd805f226708,fffffd805f226708,ffff80003c4d62b8) at vn_isunder+0x56 sys/kern/vfs_vnops.c:694 unp_externalize(fffffd806cad3200,33,0) at unp_externalize+0x286 sys/kern/uipc_usrreq.c:1086 soreceive(ffff800010fd65e8,ffff80003c4e3588,ffff80003c4e3538,0,ffff80003c4e3578,ffff80003c4e36fc,520c008d381a7512) at soreceive+0xc73 sys/kern/uipc_socket.c:1021 recvit(ffff80003c4d62b8,4,ffff80003c4e36d0,0,ffff80003c4e3780) at recvit+0x40a sys/kern/uipc_syscalls.c:1072 sys_recvmsg(ffff80003c4d62b8,ffff80003c4e3830,ffff80003c4e3780) at sys_recvmsg+0x1bf sys/kern/uipc_syscalls.c:872 syscall(ffff80003c4e3830) at syscall+0xbc6 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003c4e3830) at syscall+0xbc6 sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xe92239e5770, count: -14