witness: lock order reversal: 1st 0xffff8000014c6ad8 sbufsnd (&so->so_snd.sb_lock) 2nd 0xfffffd806e1596e0 inode (&ip->i_lock) lock order [1] sbufsnd (&so->so_snd.sb_lock) -> [2] inode (&ip->i_lock) lock order data 0xffffffff833d32bf -> 0xffffffff8334590b 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:870 #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+0xdfb 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:746 #12 Xsyscall+0x128 lock order [3] sbufrcv (&so->so_rcv.sb_lock) -> [1] sbufsnd (&so->so_snd.sb_lock) #0 rw_do_enter_write+0xba sys/kern/kern_rwlock.c:234 #1 sblock+0xb6 sys/kern/uipc_socket2.c:536 #2 sosplice+0x3e1 sys/kern/uipc_socket.c:1347 #3 sys_setsockopt+0x2ba sys/kern/uipc_syscalls.c:1227 #4 syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline] #4 syscall+0xbd4 sys/arch/amd64/amd64/trap.c:746 #5 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(fffffd806e1596e0,9,0) at witness_checkorder+0x10b9 sys/kern/subr_witness.c:-1 rw_do_enter_write(fffffd806e1596c8,1) at rw_do_enter_write+0xba sys/kern/kern_rwlock.c:234 rrw_enter(fffffd806e1596c8,1) at rrw_enter+0xc6 sys/kern/kern_rwlock.c:621 VOP_LOCK(fffffd806b729a28,2001) at VOP_LOCK+0xa3 sys/kern/vfs_vops.c:527 vn_lock(fffffd806b729a28,2001) at vn_lock+0xa4 sys/kern/vfs_vnops.c:570 vfs_lookup(ffff80003c428b30) at vfs_lookup+0x11c sys/kern/vfs_lookup.c:-1 namei(ffff80003c428b30) at namei+0x7ca sys/kern/vfs_lookup.c:250 unp_connect(ffff8000014c68f0,fffffd806cfe6c00,ffff80003c437258) at unp_connect+0x29d sys/kern/uipc_usrreq.c:872 uipc_dgram_send(ffff8000014c68f0,fffffd8069e44c00,fffffd806cfe6c00,0) at uipc_dgram_send+0x163 sys/kern/uipc_usrreq.c:609 sosend(ffff8000014c68f0,fffffd806cfe6c00,ffff80003c428db8,0,0,e) at sosend+0x804 sys/kern/uipc_socket.c:-1 sendit(ffff80003c437258,5,ffff80003c428f38,e,ffff80003c428ff0) at sendit+0x5a5 sys/kern/uipc_syscalls.c:785 sys_sendmsg(ffff80003c437258,ffff80003c4290a0,ffff80003c428ff0) at sys_sendmsg+0x246 sys/kern/uipc_syscalls.c:603 syscall(ffff80003c4290a0) at syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003c4290a0) at syscall+0xbd4 sys/arch/amd64/amd64/trap.c:746 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x1899020d5a0, count: -15 ddb{1}> show registers rdi 0 rsi 0x80000 acpi_pdirpa+0x6be71 rbp 0xffff80003c4287b0 rbx 0 rdx 0xffff800001482e40 rcx 0xffff80003c437258 rax 0x7ffff acpi_pdirpa+0x6be70 r8 0xffff80003c428690 r9 0x8080808080808080 r10 0xe2aa34264f64e220 r11 0x23f762c7f18645a3 r12 0xfffffd8003eff680 r13 0xfffffd80046e6470 r14 0x3 r15 0xffffffff833e2b64 substchar+0xf1da rip 0xffffffff831577a5 db_enter+0x25 cs 0x8 rflags 0x246 rsp 0xffff80003c4287a0 ss 0x10 db_enter+0x25: addq $0x8,%rsp ddb{1}> show proc PROC (syz-executor) tid=80951 pid=65740 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=0xffff80003c437788,0xffffffff83917b08 process=0xffff80003c41c9c8 user=0xffff80003c424000, vmspace=0xfffffd806b7cd020 estcpu=36, cpticks=0, pctcpu=0.0, user=0, sys=0, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 65740 238506 86095 0 2 0 syz-executor *65740 80951 86095 0 7 0x4000000 syz-executor 97494 278794 22068 0 2 0 syz-executor 28810 299562 53361 0 7 0 syz-executor 28810 520699 53361 0 2 0x4000000 syz-executor 87741 275124 79269 60928 2 0x10 syz-executor 87741 213463 79269 60928 2 0x4000010 syz-executor 46613 133719 59729 0 2 0 syz-executor 46613 310974 59729 0 3 0x4000080 netacc syz-executor 46613 455851 59729 0 3 0x4000080 fsleep syz-executor 46613 246411 59729 0 3 0x4000080 fsleep syz-executor 46613 332190 59729 0 3 0x4000080 fsleep syz-executor 91250 21922 8602 0 2 0 syz-executor 91250 232226 8602 0 3 0x4000080 sbwait syz-executor 91250 164297 8602 0 3 0x4000080 ttyout syz-executor 91250 384336 8602 0 3 0x4000080 fsleep syz-executor 91250 88066 8602 0 3 0x4000080 fsleep syz-executor 47341 226876 0 0 3 0x14200 bored sosplice 98729 65240 0 0 3 0x14280 nfsidl nfsio 24564 516973 0 0 3 0x14280 nfsidl nfsio 16634 45565 0 0 3 0x14280 nfsidl nfsio 97505 412855 0 0 3 0x14280 nfsidl nfsio 65177 314362 0 0 3 0x14280 nfsidl nfsio 31721 279373 0 0 3 0x14280 nfsidl nfsio 37398 394141 0 0 3 0x14280 nfsidl nfsio 84421 41191 0 0 3 0x14280 nfsidl nfsio 67672 151013 0 0 3 0x14280 nfsidl nfsio 9415 293133 0 0 3 0x14280 nfsidl nfsio 53051 426217 0 0 3 0x14280 nfsidl nfsio 51168 72209 0 0 3 0x14280 nfsidl nfsio 7010 32698 0 0 3 0x14280 nfsidl nfsio 6117 202978 0 0 3 0x14280 nfsidl nfsio 65014 79768 0 0 3 0x14280 nfsidl nfsio 615 8444 0 0 3 0x14280 nfsidl nfsio 72204 259274 0 0 3 0x14280 nfsidl nfsio 72203 281476 0 0 3 0x14280 nfsidl nfsio 31912 108328 0 0 3 0x14280 nfsidl nfsio 38616 79569 0 0 3 0x14280 nfsidl nfsio 86095 18903 36465 0 3 0x82 nanoslp syz-executor 53361 210817 36465 0 3 0x82 nanoslp syz-executor 8602 261619 36465 0 3 0x82 nanoslp syz-executor 22068 180681 36465 0 2 0x2 syz-executor 20543 4488 36465 0 3 0x82 nanoslp syz-executor 79269 196617 36465 0 3 0x82 nanoslp syz-executor 59729 3824 36465 0 3 0x82 nanoslp syz-executor 8880 328250 36465 0 3 0x82 wait syz-executor 36465 254344 48992 0 3 0x82 kqread syz-executor 48992 79922 15431 0 3 0x10008a sigsusp ksh 15431 21486 73736 0 3 0x98 kqread sshd-session 73736 200077 26995 0 3 0x92 kqread sshd-session 72315 115282 1 0 3 0x100083 ttyin getty 26995 56845 1 0 3 0x88 kqread sshd 80499 410410 4887 74 3 0x1100092 bpf pflogd 4887 292522 1 0 3 0x80 sbwait pflogd 8785 277491 38324 73 3 0x1100090 kqread syslogd 38324 308840 1 0 3 0x100082 sbwait syslogd 76888 83220 1 0 3 0x100080 kqread resolvd 23258 499906 91508 77 3 0x100092 kqread dhcpleased 87800 53843 91508 77 3 0x100092 kqread dhcpleased 91508 265414 1 0 3 0x80 kqread dhcpleased 77249 210353 0 0 3 0x14200 bored smr 80653 174234 0 0 2 0x14200 zerothread 83675 468607 0 0 3 0x14200 aiodoned aiodoned 55250 116350 0 0 3 0x14200 syncer update 64505 69052 0 0 3 0x14200 cleaner cleaner 62414 391179 0 0 3 0x14200 reaper reaper 88363 331494 0 0 3 0x14200 pgdaemon pagedaemon 87581 349431 0 0 3 0x14200 bored viomb 8801 223861 0 0 3 0x40014200 acpi0 acpi0 94383 194898 0 0 3 0x40014200 idle1 54956 178977 0 0 3 0x14200 bored softnet1 51679 423155 0 0 2 0x14200 softnet0 34964 60464 0 0 3 0x14200 bored systqmp 68069 43875 0 0 3 0x14200 bored systq 44181 68990 0 0 3 0x14200 tmoslp softclockmp 95488 171440 0 0 3 0x40014200 tmoslp softclock 10091 461358 0 0 3 0x40014200 idle0 1 298572 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{1}> show all locks Process 65740 (syz-executor) thread 0xffff80003c437258 (80951) exclusive kernel_lock &kernel_lock r = 0 (0xffffffff83915fc0) #0 witness_lock+0x5f1 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5f1 sys/kern/subr_witness.c:1160 #1 unp_connect+0x28c sys/kern/uipc_usrreq.c:872 #2 uipc_dgram_send+0x163 sys/kern/uipc_usrreq.c:609 #3 sosend+0x804 sys/kern/uipc_socket.c:-1 #4 sendit+0x5a5 sys/kern/uipc_syscalls.c:785 #5 sys_sendmsg+0x246 sys/kern/uipc_syscalls.c:603 #6 syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline] #6 syscall+0xbd4 sys/arch/amd64/amd64/trap.c:746 #7 Xsyscall+0x128 exclusive rwlock sbufsnd r = 0 (0xffff8000014c6ad8) #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 sblock+0xb6 sys/kern/uipc_socket2.c:536 #3 sosend+0x2e9 sys/kern/uipc_socket.c:631 #4 sendit+0x5a5 sys/kern/uipc_syscalls.c:785 #5 sys_sendmsg+0x246 sys/kern/uipc_syscalls.c:603 #6 syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline] #6 syscall+0xbd4 sys/arch/amd64/amd64/trap.c:746 #7 Xsyscall+0x128 Process 91250 (syz-executor) thread 0xffff80003b80cd18 (232226) exclusive rrwlock inode r = 0 (0xfffffd806c009c68) #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 vget+0x2a2 sys/kern/vfs_subr.c:693 #6 cache_lookup+0x351 sys/kern/vfs_cache.c:222 #7 ufs_lookup+0x1e3 sys/ufs/ufs/ufs_lookup.c:160 #8 VOP_LOOKUP+0x6e sys/kern/vfs_vops.c:85 #9 vfs_lookup+0x93a sys/kern/vfs_lookup.c:566 #10 namei+0x7ca sys/kern/vfs_lookup.c:250 #11 vn_open+0x15a sys/kern/vfs_vnops.c:140 #12 vndioctl+0xc42 sys/dev/vnd.c:458 #13 VOP_IOCTL+0xac sys/kern/vfs_vops.c:264 #14 vn_ioctl+0xf8 sys/kern/vfs_vnops.c:531 #15 sys_ioctl+0x674 sys/kern/sys_generic.c:-1 #16 syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline] #16 syscall+0xbd4 sys/arch/amd64/amd64/trap.c:746 #17 Xsyscall+0x128 ddb{1}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10199 11025K 11301K 166960K 11402 0 pcb 17 13K 13K 166960K 49 0 rtable 211 6K 6K 166960K 267 0 pf 36 17K 18K 166960K 63 0 ifaddr 44 7K 8K 166960K 58 0 ifgroup 57 2K 2K 166960K 79 0 sysctl 3 1K 9K 166960K 7 0 counters 74 37K 37K 166960K 100 0 ioctlops 0 0K 4K 166960K 1499 0 iov 0 0K 16K 166960K 8 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1340 84K 85K 166960K 1461 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 5K 166960K 3 0 VM map 2 1K 1K 166960K 2 0 sem 5 0K 0K 166960K 5 0 dirhash 12 2K 2K 166960K 12 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 18 65K 93K 166960K 234 0 sigio 0 0K 0K 166960K 2 0 proc 72 115K 164K 166960K 534 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 5 0 in_multi 99 7K 7K 166960K 103 0 ether_multi 1 0K 0K 166960K 1 0 mrt 0 0K 0K 166960K 1 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 73 334K 334K 166960K 73 0 exec 0 0K 1K 166960K 375 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 241 168K 177K 166960K 3772 0 UVM aobj 4 2K 4K 166960K 5 0 pinsyscall 43 86K 102K 166960K 1312 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 12 0 NDP 13 0K 2K 166960K 36 0 temp 43 8643K 8709K 166960K 5208 0 kqueue 15 24K 28K 166960K 49 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 37 0 34 1 0 1 1 0 8 0 rtentry 176 99 0 4 5 0 5 5 0 8 0 unpcb 144 86 0 62 2 0 2 2 0 8 0 syncache 336 3 0 3 1 1 0 1 0 8 0 tcpcb 736 28 0 23 1 0 1 1 0 8 0 arp 136 10 0 0 1 0 1 1 0 8 0 inpcb 328 175 0 165 4 0 4 4 0 8 2 nd6 152 17 0 0 1 0 1 1 0 8 0 kcovpl 48 8 0 0 1 0 1 1 0 8 0 ppxss 1192 13 0 10 1 0 1 1 0 8 0 pppxif 1504 4 0 4 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 pfstitem 24 22 0 0 1 0 1 1 0 8 0 pfstkey 128 22 0 0 1 0 1 1 0 8 0 pfstate 384 22 0 0 3 0 3 3 0 8 0 pfrule 1344 21 0 16 2 1 1 2 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 451 0 12 28 0 28 28 0 8 0 art_table 40 452 0 12 5 0 5 5 0 8 0 art_node 32 99 0 14 1 0 1 1 0 8 0 semapl 112 3 0 0 1 0 1 1 0 8 0 shmpl 112 2 0 1 1 0 1 1 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 1778 0 261 95 0 95 95 0 8 0 ffsino 296 1778 0 261 117 0 117 117 0 8 0 nchpl 144 2100 0 409 63 0 63 63 0 8 0 rtmask 32 2 0 2 1 0 1 1 0 8 1 uvmvnodes 80 1894 0 0 39 0 39 39 0 8 0 vnodes 216 1894 0 0 106 0 106 106 0 8 0 namei 1024 6502 0 6501 2 0 2 2 0 8 1 percpumem 16 65 0 13 1 0 1 1 0 8 0 kstatmem 264 42 0 14 3 0 3 3 0 8 0 scsiplug 72 3 0 3 1 0 1 1 0 8 1 scxspl 216 7119 0 7119 2 1 1 2 1 8 1 plimitpl 152 43 0 24 1 0 1 1 0 8 0 sigapl 424 551 0 482 8 0 8 8 0 8 0 knotepl 120 68 0 0 3 0 3 3 0 8 0 kqueuepl 224 64 0 52 1 0 1 1 0 8 0 pipepl 344 111 0 84 3 0 3 3 0 8 0 fdescpl 528 514 0 482 3 0 3 3 0 8 0 filepl 160 2159 0 1922 12 0 12 12 0 8 1 lockfpl 104 36 0 33 1 0 1 1 0 8 0 lockfspl 48 18 0 15 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 104 273 0 258 1 0 1 1 0 8 0 zombiepl 144 484 0 482 1 0 1 1 0 8 0 processpl 1232 551 0 482 6 0 6 6 0 8 0 procpl 664 739 0 659 8 0 8 8 0 8 1 sosppl 168 2 0 2 1 0 1 1 0 8 1 sockpl 752 302 0 265 8 0 8 8 0 8 2 mcl64k 65536 4 0 0 1 0 1 1 0 8 0 mcl8k 8192 2 0 0 1 0 1 1 0 8 0 mcl4k 4096 145 0 0 18 0 18 18 0 8 0 mcl2k 2048 29 0 0 4 0 4 4 0 8 0 mtagpl 96 3 0 0 1 0 1 1 0 8 0 mbufpl 256 540 0 0 34 0 34 34 0 8 0 bufpl 280 3066 0 122 211 0 211 211 0 8 0 anonpl 32 5578 0 0 45 0 45 45 0 246 0 amapchunkpl 152 11462 0 10961 31 3 28 28 0 158 5 amappl16 200 1381 0 1356 4 2 2 4 0 8 0 amappl15 192 8 0 8 1 1 0 1 0 8 0 amappl14 184 112 0 100 1 0 1 1 0 8 0 amappl13 176 6 0 5 1 0 1 1 0 8 0 amappl12 168 1155 0 1123 4 1 3 3 0 8 1 amappl11 160 50 0 36 1 0 1 1 0 8 0 amappl10 152 4 0 3 1 0 1 1 0 8 0 amappl9 144 288 0 288 1 1 0 1 0 8 0 amappl8 136 21 0 19 1 0 1 1 0 8 0 amappl7 128 117 0 105 1 0 1 1 0 8 0 amappl6 120 172 0 169 1 0 1 1 0 8 0 amappl5 112 117 0 107 1 0 1 1 0 8 0 amappl4 104 306 0 287 1 0 1 1 0 8 0 amappl3 96 1801 0 1702 4 1 3 3 0 8 0 amappl2 88 734 0 658 2 0 2 2 0 8 0 amappl1 80 8598 0 7998 14 0 14 14 0 8 1 amappl 88 3095 0 2927 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 0 254 2 1 1 1 0 8 1 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 4 0 1 1 0 1 1 0 8 0 uaddrrnd 24 514 0 482 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 514 0 482 1 0 1 1 0 8 0 vmmpekpl 168 5852 0 5817 2 0 2 2 0 8 0 vmmpepl 168 38502 0 36493 90 0 90 90 0 357 0 vmsppl 488 513 0 482 5 0 5 5 0 8 1 rwobjpl 80 14671 0 11847 59 0 59 59 0 8 0 pdppl 4096 1036 0 964 96 24 72 86 0 8 0 pvpl 32 13708 0 0 112 1 111 111 0 265 0 pmappl 256 513 0 482 3 0 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 291 0 27 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(ffffffff837efff0) 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(ffffffff83915db8) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:134 [inline] __mp_lock(ffffffff83915db8) at __mp_lock+0x192 sys/kern/kern_lock.c:165 softintr_dispatch(0) at softintr_dispatch+0x125 sys/kern/kern_softintr.c:83 dosoftint(0) at dosoftint+0x54 sys/arch/amd64/amd64/intr.c:847 Xsoftclock() at Xsoftclock+0x27 end of kernel end trace frame: 0x74fbc8f65470, count: -7 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(fffffd806e1596e0,9,0) at witness_checkorder+0x10b9 sys/kern/subr_witness.c:-1 rw_do_enter_write(fffffd806e1596c8,1) at rw_do_enter_write+0xba sys/kern/kern_rwlock.c:234 rrw_enter(fffffd806e1596c8,1) at rrw_enter+0xc6 sys/kern/kern_rwlock.c:621 VOP_LOCK(fffffd806b729a28,2001) at VOP_LOCK+0xa3 sys/kern/vfs_vops.c:527 vn_lock(fffffd806b729a28,2001) at vn_lock+0xa4 sys/kern/vfs_vnops.c:570 vfs_lookup(ffff80003c428b30) at vfs_lookup+0x11c sys/kern/vfs_lookup.c:-1 namei(ffff80003c428b30) at namei+0x7ca sys/kern/vfs_lookup.c:250 unp_connect(ffff8000014c68f0,fffffd806cfe6c00,ffff80003c437258) at unp_connect+0x29d sys/kern/uipc_usrreq.c:872 uipc_dgram_send(ffff8000014c68f0,fffffd8069e44c00,fffffd806cfe6c00,0) at uipc_dgram_send+0x163 sys/kern/uipc_usrreq.c:609 sosend(ffff8000014c68f0,fffffd806cfe6c00,ffff80003c428db8,0,0,e) at sosend+0x804 sys/kern/uipc_socket.c:-1 sendit(ffff80003c437258,5,ffff80003c428f38,e,ffff80003c428ff0) at sendit+0x5a5 sys/kern/uipc_syscalls.c:785 sys_sendmsg(ffff80003c437258,ffff80003c4290a0,ffff80003c428ff0) at sys_sendmsg+0x246 sys/kern/uipc_syscalls.c:603 syscall(ffff80003c4290a0) at syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003c4290a0) at syscall+0xbd4 sys/arch/amd64/amd64/trap.c:746 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x1899020d5a0, count: -15