witness: lock order reversal: 1st 0xffff8000013ec460 sbufsnd (&so->so_snd.sb_lock) 2nd 0xfffffd80722721b0 inode (&ip->i_lock) lock order [1] sbufsnd (&so->so_snd.sb_lock) -> [2] inode (&ip->i_lock) lock order data 0xffffffff830be9a1 -> 0xffffffff8306b4aa is missing lock order [2] inode (&ip->i_lock) -> [3] sbufrcv (&so->so_rcv.sb_lock) #0 rw_enter+0x122 #1 sblock+0xb7 sys/kern/uipc_socket2.c:549 #2 soreceive+0x295 sys/kern/uipc_socket.c:945 #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+0xf6 sys/kern/vfs_vnops.c:525 #10 sys_ioctl+0x67c #11 syscall+0xbb6 mi_syscall sys/sys/syscall_mi.h:178 [inline] #11 syscall+0xbb6 sys/arch/amd64/amd64/trap.c:577 #12 Xsyscall+0x128 lock order [3] sbufrcv (&so->so_rcv.sb_lock) -> [1] sbufsnd (&so->so_snd.sb_lock) #0 rw_enter+0x122 #1 sblock+0xb7 sys/kern/uipc_socket2.c:549 #2 sosplice+0x3f4 sys/kern/uipc_socket.c:1454 #3 sys_setsockopt+0x2ba sys/kern/uipc_syscalls.c:1228 #4 syscall+0xbb6 mi_syscall sys/sys/syscall_mi.h:178 [inline] #4 syscall+0xbb6 sys/arch/amd64/amd64/trap.c:577 #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:437 witness_checkorder(fffffd80722721b0,9,0) at witness_checkorder+0x1047 rw_enter(fffffd80722721a0,1) at rw_enter+0x122 rrw_enter(fffffd80722721a0,1) at rrw_enter+0xbe sys/kern/kern_rwlock.c:464 VOP_LOCK(fffffd807be62708,2001) at VOP_LOCK+0xa6 sys/kern/vfs_vops.c:524 vn_lock(fffffd807be62708,2001) at vn_lock+0xa4 sys/kern/vfs_vnops.c:564 vfs_lookup(ffff80002a0e4528) at vfs_lookup+0x109 sys/kern/vfs_lookup.c:418 namei(ffff80002a0e4528) at namei+0x7aa sys/kern/vfs_lookup.c:250 unp_connect(ffff8000013ec2b8,fffffd806bd78100,ffff8000fffee548) at unp_connect+0x27d sys/kern/uipc_usrreq.c:868 uipc_dgram_send(ffff8000013ec2b8,fffffd805ee01900,fffffd806bd78100,0) at uipc_dgram_send+0x131 sys/kern/uipc_usrreq.c:607 sosend(ffff8000013ec2b8,fffffd806bd78100,ffff80002a0e47b8,0,0,0) at sosend+0xa40 sendit(ffff8000fffee548,5,ffff80002a0e4930,0,ffff80002a0e49f0) at sendit+0x721 sys/kern/uipc_syscalls.c:786 sys_sendmsg(ffff8000fffee548,ffff80002a0e4aa0,ffff80002a0e49f0) at sys_sendmsg+0x246 sys/kern/uipc_syscalls.c:604 syscall(ffff80002a0e4aa0) at syscall+0xbb6 mi_syscall sys/sys/syscall_mi.h:178 [inline] syscall(ffff80002a0e4aa0) at syscall+0xbb6 sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x1a40d3c3b50, count: -15 ddb{1}> show registers rdi 0 rsi 0x40000 acpi_pdirpa+0x2be71 rbp 0xffff80002a0e4180 rbx 0xfffffd80042c2828 rdx 0xffff8000012909c0 rcx 0xffff8000fffee548 rax 0x3ffff acpi_pdirpa+0x2be70 r8 0xffff80002a0e4060 r9 0x8080808080808080 r10 0xde059ed6c7906264 r11 0x610e5c7ea704b5c2 r12 0 r13 0xfffffd8003adae00 r14 0x3 r15 0xffffffff rip 0xffffffff81610e15 db_enter+0x25 cs 0x8 rflags 0x246 rsp 0xffff80002a0e4170 ss 0x10 db_enter+0x25: addq $0x8,%rsp ddb{1}> show proc PROC (syz-executor) tid=332908 pid=11178 tcnt=3 stat=onproc flags process=10 proc=4000000 runpri=32, usrpri=83, slppri=32, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff8000fffef478,0xffff8000fffee2d0 process=0xffff8000ffff1fb8 user=0xffff80002a0df000, vmspace=0xfffffd806bef08e0 estcpu=33, cpticks=0, pctcpu=0.0, user=0, sys=0, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 80329 370333 22011 0 7 0 syz-executor 80329 125053 22011 0 2 0x4000000 syz-executor 2631 457804 15956 0 2 0 syz-executor 2631 30595 15956 0 3 0x4000080 fsleep syz-executor 2631 254242 15956 0 3 0x4000080 fsleep syz-executor 2631 307723 15956 0 3 0x4000080 fsleep syz-executor 28575 32809 26832 0 2 0 syz-executor 28575 488046 26832 0 3 0x4000080 fsleep syz-executor 11178 414081 82845 0 2 0x10 syz-executor *11178 332908 82845 0 7 0x4000010 syz-executor 11178 243354 82845 0 3 0x4000090 fsleep syz-executor 58314 375261 39108 0 2 0 syz-executor 58314 34838 39108 0 3 0x4000080 wsevent_read syz-executor 58314 169496 39108 0 3 0x4000080 wsevent_read syz-executor 58314 491419 39108 0 2 0x4000000 syz-executor 91606 309543 56903 0 3 0x80 nanoslp syz-executor 91606 441128 56903 0 3 0x4000080 fsleep syz-executor 91606 51651 56903 0 3 0x4000080 sbwait syz-executor 48542 294438 46420 0 3 0x80 nanoslp syz-executor 48542 137157 46420 0 3 0x4000080 ttyout syz-executor 48542 342233 46420 0 3 0x4000080 fsleep syz-executor 94374 102078 0 0 3 0x14280 nfsidl nfsio 44858 8980 0 0 3 0x14280 nfsidl nfsio 55488 41785 0 0 3 0x14280 nfsidl nfsio 17537 174252 0 0 3 0x14280 nfsidl nfsio 63603 265918 0 0 3 0x14280 nfsidl nfsio 94406 420330 0 0 3 0x14280 nfsidl nfsio 60758 258414 0 0 3 0x14280 nfsidl nfsio 3680 194924 0 0 3 0x14280 nfsidl nfsio 82369 52382 0 0 3 0x14280 nfsidl nfsio 91196 184854 0 0 3 0x14280 nfsidl nfsio 70736 138849 0 0 3 0x14280 nfsidl nfsio 99353 205362 0 0 3 0x14280 nfsidl nfsio 13854 509873 0 0 3 0x14280 nfsidl nfsio 96207 59406 0 0 3 0x14280 nfsidl nfsio 88137 204254 0 0 3 0x14280 nfsidl nfsio 6294 470883 0 0 3 0x14280 nfsidl nfsio 86418 113429 0 0 3 0x14280 nfsidl nfsio 4432 315304 0 0 3 0x14280 nfsidl nfsio 7906 349925 0 0 3 0x14280 nfsidl nfsio 30011 78752 0 0 3 0x14280 nfsidl nfsio 39108 331297 65237 0 3 0x82 nanoslp syz-executor 44238 296721 1 0 3 0x100083 ttyin getty 87628 241678 0 0 3 0x14200 bored sosplice 47378 193515 57590 0 3 0x100082 sbwait ndp 57590 331924 67221 0 3 0x10008a sigsusp sh 56903 142100 65237 0 3 0x82 nanoslp syz-executor 15956 382537 65237 0 3 0x82 nanoslp syz-executor 26832 404603 65237 0 3 0x82 nanoslp syz-executor 46420 340462 65237 0 3 0x82 nanoslp syz-executor 82845 401270 65237 0 3 0x82 nanoslp syz-executor 22011 113288 65237 0 3 0x82 nanoslp syz-executor 67221 169688 65237 0 3 0x82 wait syz-executor 65237 6149 95197 0 3 0x82 kqread syz-executor 95197 314767 34004 0 3 0x10008a sigsusp ksh 34004 512484 32879 0 3 0x98 kqread sshd-session 32879 274348 94925 0 3 0x92 kqread sshd-session 94925 301101 1 0 3 0x88 kqread sshd 79165 87774 32122 74 3 0x1100092 bpf pflogd 32122 247640 1 0 3 0x80 sbwait pflogd 24366 153116 81617 73 3 0x1100090 kqread syslogd 81617 340040 1 0 3 0x100082 sbwait syslogd 58395 496252 1 0 3 0x100080 kqread resolvd 14104 323028 34649 77 3 0x100092 kqread dhcpleased 69665 9240 34649 77 3 0x100092 kqread dhcpleased 34649 212595 1 0 3 0x80 kqread dhcpleased 10773 467676 0 0 3 0x14200 bored smr 42803 305908 0 0 2 0x14200 zerothread 70939 184077 0 0 3 0x14200 aiodoned aiodoned 32987 419370 0 0 3 0x14200 syncer update 75720 480387 0 0 3 0x14200 cleaner cleaner 74755 197843 0 0 3 0x14200 reaper reaper 77070 293767 0 0 3 0x14200 pgdaemon pagedaemon 38636 354898 0 0 3 0x14200 bored viomb 3989 448725 0 0 3 0x40014200 acpi0 acpi0 27854 422977 0 0 3 0x40014200 idle1 92466 224893 0 0 3 0x14200 bored softnet3 37621 415048 0 0 3 0x14200 bored softnet2 35622 215219 0 0 3 0x14200 bored softnet1 69807 470146 0 0 3 0x14200 bored softnet0 82742 86463 0 0 3 0x14200 bored systqmp 38241 521904 0 0 3 0x14200 bored systq 36204 358139 0 0 3 0x14200 tmoslp softclockmp 94675 497129 0 0 3 0x40014200 tmoslp softclock 66097 243235 0 0 3 0x40014200 idle0 1 24223 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{1}> show all locks Process 11178 (syz-executor) thread 0xffff8000fffee548 (332908) exclusive kernel_lock &kernel_lock r = 0 (0xffffffff8359d538) #0 witness_lock+0x5bb stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5bb sys/kern/subr_witness.c:1155 #1 unp_connect+0x26c sys/kern/uipc_usrreq.c:868 #2 uipc_dgram_send+0x131 sys/kern/uipc_usrreq.c:607 #3 sosend+0xa40 #4 sendit+0x721 sys/kern/uipc_syscalls.c:786 #5 sys_sendmsg+0x246 sys/kern/uipc_syscalls.c:604 #6 syscall+0xbb6 mi_syscall sys/sys/syscall_mi.h:178 [inline] #6 syscall+0xbb6 sys/arch/amd64/amd64/trap.c:577 #7 Xsyscall+0x128 exclusive rwlock sbufsnd r = 0 (0xffff8000013ec460) #0 witness_lock+0x5bb stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5bb sys/kern/subr_witness.c:1155 #1 rw_enter+0x41b sys/kern/kern_rwlock.c:309 #2 sblock+0xb7 sys/kern/uipc_socket2.c:549 #3 sosend+0x2ff sys/kern/uipc_socket.c:681 #4 sendit+0x721 sys/kern/uipc_syscalls.c:786 #5 sys_sendmsg+0x246 sys/kern/uipc_syscalls.c:604 #6 syscall+0xbb6 mi_syscall sys/sys/syscall_mi.h:178 [inline] #6 syscall+0xbb6 sys/arch/amd64/amd64/trap.c:577 #7 Xsyscall+0x128 ddb{1}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10229 11263K 11582K 166960K 12956 0 pcb 17 18K 23K 166960K 431 0 rtable 173 5K 7K 166960K 476 0 pf 34 17K 20K 166960K 102 0 ifaddr 35 6K 8K 166960K 79 0 ifgroup 54 2K 2K 166960K 121 0 sysctl 4 1K 1K 166960K 4 0 counters 62 36K 36K 166960K 108 0 ioctlops 0 0K 4K 166960K 1565 0 iov 1 2K 16K 166960K 151 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1423 89K 90K 166960K 2366 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 16K 20K 166960K 27 0 VM map 2 1K 1K 166960K 2 0 sem 22 16K 26K 166960K 37 0 dirhash 12 2K 3K 166960K 45 0 ACPI 1690 195K 286K 166960K 12468 0 file desc 19 69K 93K 166960K 1287 0 sigio 0 0K 0K 166960K 86 0 proc 72 91K 140K 166960K 690 0 subproc 104 6K 6K 166960K 117 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 134 0 in_multi 76 5K 7K 166960K 161 0 ether_multi 1 0K 0K 166960K 7 0 mrt 0 0K 0K 166960K 3 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 241 1076K 1076K 166960K 241 0 exec 0 0K 1K 166960K 597 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 262 74K 87K 166960K 13853 0 UVM aobj 78 7K 7K 166960K 82 0 pinsyscall 45 90K 110K 166960K 2416 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 126 0 NDP 11 0K 2K 166960K 56 0 temp 77 6828K 6924K 166960K 38012 0 kqueue 13 20K 28K 166960K 218 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 24 0 0 1 0 1 1 0 8 0 rtpcb 120 107 0 103 1 0 1 1 0 8 0 rtentry 112 149 0 71 4 0 4 4 0 8 0 unpcb 144 1118 0 1029 10 6 4 6 0 8 0 syncache 336 10 0 10 3 2 1 1 0 8 1 tcpqe 32 2 0 2 1 0 1 1 0 8 1 tcpcb 808 589 0 580 27 19 8 14 0 8 7 arp 120 27 0 11 1 0 1 1 0 8 0 inpcb 336 1763 0 1748 35 28 7 13 0 8 5 nd6 136 33 0 13 1 0 1 1 0 8 0 pkpcb 40 1 0 1 1 0 1 1 0 8 1 kcovpl 48 9 0 1 1 0 1 1 0 8 0 ppxss 1168 15 0 15 4 3 1 1 0 8 1 pffrag 232 7 0 2 1 0 1 1 0 482 0 pffrnode 88 7 0 2 1 0 1 1 0 8 0 pffrent 40 12 0 7 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 pftag 88 2 0 0 1 0 1 1 0 8 0 pfstitem 24 109 0 31 1 0 1 1 0 8 0 pfstkey 128 109 0 31 3 0 3 3 0 8 0 pfstate 376 109 0 31 8 0 8 8 0 8 0 pfrule 1344 24 0 17 2 0 2 2 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 626 0 262 30 2 28 30 0 8 1 art_table 32 627 0 262 4 0 4 4 0 8 0 art_node 16 147 0 78 1 0 1 1 0 8 0 sysvmsgpl 40 4 0 0 1 0 1 1 0 8 0 semupl 112 3 0 3 2 2 0 1 0 8 0 semapl 112 30 0 10 1 0 1 1 0 8 0 shmpl 112 79 0 4 3 0 3 3 0 8 0 dirhash 1024 39 0 22 3 0 3 3 0 8 0 dino2pl 256 3648 0 2155 95 0 95 95 0 8 0 ffsino 272 3648 0 2155 101 0 101 101 0 8 0 nchpl 144 5463 0 3775 63 0 63 63 0 8 0 uvmvnodes 80 4386 0 0 90 0 90 90 0 8 0 vnodes 216 4386 0 0 244 0 244 244 0 8 0 namei 1024 18941 0 18940 2 1 1 1 0 8 0 percpumem 16 68 0 23 1 0 1 1 0 8 0 kstatmem 264 68 0 46 2 0 2 2 0 8 0 scsiplug 72 7 0 7 2 1 1 1 0 8 1 scxspl 216 17685 0 17685 10 8 2 7 1 8 2 plimitpl 152 251 0 234 1 0 1 1 0 8 0 sigapl 424 1612 0 1540 9 0 9 9 0 8 0 futexpl 64 18413 0 18406 1 0 1 1 0 8 0 knotepl 120 550 0 0 17 0 17 17 0 8 0 kqueuepl 216 436 0 427 5 4 1 3 0 8 0 pipepl 320 218 0 191 3 0 3 3 0 8 0 fdescpl 496 1572 0 1539 5 0 5 5 0 8 0 filepl 152 10540 0 10219 29 13 16 16 0 8 3 lockfpl 104 423 0 421 1 0 1 1 0 8 0 lockfspl 48 156 0 154 1 0 1 1 0 8 0 sessionpl 144 30 0 21 1 0 1 1 0 8 0 pgrppl 48 51 0 34 1 0 1 1 0 8 0 ucredpl 104 1655 0 1641 1 0 1 1 0 8 0 zombiepl 144 1684 0 1684 2 1 1 1 0 8 1 processpl 1160 1612 0 1540 6 0 6 6 0 8 0 procpl 648 3615 0 3529 8 0 8 8 0 8 0 srpgc 96 4 0 4 2 1 1 1 0 8 1 sosppl 168 10 0 10 2 2 0 1 0 8 0 sockpl 664 3002 0 2896 43 29 14 15 0 8 5 mcl64k 65536 4 0 0 1 0 1 1 0 8 0 mcl12k 12288 1 0 0 1 0 1 1 0 8 0 mcl9k 9216 2 0 0 1 0 1 1 0 8 0 mcl8k 8192 8 0 0 1 0 1 1 0 8 0 mcl4k 4096 136 0 0 17 0 17 17 0 8 0 mcl2k 2048 27 0 0 4 0 4 4 0 8 0 mtagpl 96 82 0 0 2 0 2 2 0 8 0 mbufpl 256 307 0 0 19 0 19 19 0 8 0 bufpl 280 5267 0 103 369 0 369 369 0 8 0 anonpl 24 269046 0 263417 85 26 59 59 0 185 1 amapchunkpl 152 45219 0 44568 39 9 30 34 0 158 3 amappl16 200 6906 0 6849 37 21 16 16 0 8 6 amappl15 192 4 0 4 1 1 0 1 0 8 0 amappl14 184 126 0 113 1 0 1 1 0 8 0 amappl13 176 8 0 8 3 3 0 1 0 8 0 amappl12 168 2240 0 2206 4 2 2 3 0 8 0 amappl11 160 59 0 44 1 0 1 1 0 8 0 amappl10 152 23 0 22 3 2 1 1 0 8 0 amappl9 144 151 0 150 1 0 1 1 0 8 0 amappl8 136 24 0 21 1 0 1 1 0 8 0 amappl7 128 117 0 104 1 0 1 1 0 8 0 amappl6 120 175 0 172 1 0 1 1 0 8 0 amappl5 112 145 0 133 1 0 1 1 0 8 0 amappl4 104 334 0 315 1 0 1 1 0 8 0 amappl3 96 8392 0 8284 3 0 3 3 0 8 0 amappl2 88 1905 0 1815 3 0 3 3 0 8 0 amappl1 80 12537 0 11939 15 1 14 15 0 8 0 amappl 88 13344 0 13147 5 0 5 5 0 92 0 dma4096 4096 2 0 2 2 2 0 1 0 8 0 dma2048 2048 1 0 1 1 0 1 1 0 8 1 dma1024 1024 1 0 0 1 0 1 1 0 8 0 dma512 512 1 0 1 1 1 0 1 0 8 0 dma256 256 6 0 6 1 1 0 1 0 8 0 dma128 128 255 0 255 2 2 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 19 0 18 1 0 1 1 0 8 0 aobjpl 72 81 0 4 2 0 2 2 0 8 0 uaddrrnd 24 1572 0 1539 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 1572 0 1539 1 0 1 1 0 8 0 vmmpekpl 168 14068 0 14026 3 0 3 3 0 8 0 vmmpepl 168 104516 0 102512 119 21 98 98 0 357 5 vmsppl 448 1571 0 1539 6 1 5 5 0 8 0 rwobjpl 56 35345 0 29847 81 3 78 78 0 8 0 pdppl 4096 3151 0 3078 111 38 73 85 0 8 0 pvpl 32 17007 0 0 138 1 137 137 0 265 0 pmappl 248 1571 0 1539 3 0 3 3 0 8 0 extentpl 40 55 0 38 1 0 1 1 0 8 0 phpool 112 466 0 98 11 0 11 11 0 8 0 ddb{1}> machine ddbcpu 0 Stopped at x86_ipi_db+0x27: addq $0x8,%rsp ddb{0}> trace x86_ipi_db(ffffffff8349fff0) at x86_ipi_db+0x27 sys/arch/amd64/amd64/db_interface.c:393 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(ffffffff8359d330) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:113 [inline] __mp_lock(ffffffff8359d330) at __mp_lock+0x192 sys/kern/kern_lock.c:144 intr_handler(ffff8000371ea100,ffff800000069c00) at intr_handler+0xe1 sys/arch/amd64/amd64/intr.c:553 Xintr_ioapic_edge16_untramp() at Xintr_ioapic_edge16_untramp+0x18f __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x33 kd_curproc sys/dev/kcov.c:585 [inline] __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x33 sys/dev/kcov.c:153 __mp_lock(ffffffff8359d330) at __mp_lock+0x1a3 __mp_lock_spin sys/kern/kern_lock.c:113 [inline] __mp_lock(ffffffff8359d330) at __mp_lock+0x1a3 sys/kern/kern_lock.c:144 intr_handler(ffff8000371ea270,ffff800000079e00) at intr_handler+0xe1 sys/arch/amd64/amd64/intr.c:553 Xintr_ioapic_edge25_untramp() at Xintr_ioapic_edge25_untramp+0x18f __mp_lock(ffffffff8359d330) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:113 [inline] __mp_lock(ffffffff8359d330) at __mp_lock+0x192 sys/kern/kern_lock.c:144 softintr_dispatch(0) at softintr_dispatch+0x5b sys/arch/amd64/amd64/softintr.c:88 Xsoftclock() at Xsoftclock+0x27 end of kernel end trace frame: 0x719c5f9fe9f0, count: -13 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:437 witness_checkorder(fffffd80722721b0,9,0) at witness_checkorder+0x1047 rw_enter(fffffd80722721a0,1) at rw_enter+0x122 rrw_enter(fffffd80722721a0,1) at rrw_enter+0xbe sys/kern/kern_rwlock.c:464 VOP_LOCK(fffffd807be62708,2001) at VOP_LOCK+0xa6 sys/kern/vfs_vops.c:524 vn_lock(fffffd807be62708,2001) at vn_lock+0xa4 sys/kern/vfs_vnops.c:564 vfs_lookup(ffff80002a0e4528) at vfs_lookup+0x109 sys/kern/vfs_lookup.c:418 namei(ffff80002a0e4528) at namei+0x7aa sys/kern/vfs_lookup.c:250 unp_connect(ffff8000013ec2b8,fffffd806bd78100,ffff8000fffee548) at unp_connect+0x27d sys/kern/uipc_usrreq.c:868 uipc_dgram_send(ffff8000013ec2b8,fffffd805ee01900,fffffd806bd78100,0) at uipc_dgram_send+0x131 sys/kern/uipc_usrreq.c:607 sosend(ffff8000013ec2b8,fffffd806bd78100,ffff80002a0e47b8,0,0,0) at sosend+0xa40 sendit(ffff8000fffee548,5,ffff80002a0e4930,0,ffff80002a0e49f0) at sendit+0x721 sys/kern/uipc_syscalls.c:786 sys_sendmsg(ffff8000fffee548,ffff80002a0e4aa0,ffff80002a0e49f0) at sys_sendmsg+0x246 sys/kern/uipc_syscalls.c:604 syscall(ffff80002a0e4aa0) at syscall+0xbb6 mi_syscall sys/sys/syscall_mi.h:178 [inline] syscall(ffff80002a0e4aa0) at syscall+0xbb6 sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x1a40d3c3b50, count: -15