witness: lock order reversal: 1st 0xffff8000012f49a8 sbufsnd (&so->so_snd.sb_lock) 2nd 0xfffffd8061466d68 inode (&ip->i_lock) lock order [1] sbufsnd (&so->so_snd.sb_lock) -> [2] inode (&ip->i_lock) lock order data 0xffffffff830a027e -> 0xffffffff8304f7ef 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+0x298 sys/kern/uipc_socket.c:877 #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:179 [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+0x3e3 sys/kern/uipc_socket.c:1386 #3 sys_setsockopt+0x2ba sys/kern/uipc_syscalls.c:1231 #4 syscall+0xbb6 mi_syscall sys/sys/syscall_mi.h:179 [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(fffffd8061466d68,9,0) at witness_checkorder+0x1024 rw_enter(fffffd8061466d58,1) at rw_enter+0x122 rrw_enter(fffffd8061466d58,1) at rrw_enter+0xbe sys/kern/kern_rwlock.c:464 VOP_LOCK(fffffd806896a1b8,2001) at VOP_LOCK+0xa6 sys/kern/vfs_vops.c:524 vn_lock(fffffd806896a1b8,2001) at vn_lock+0xa4 sys/kern/vfs_vnops.c:564 vfs_lookup(ffff8000371c1978) at vfs_lookup+0x109 sys/kern/vfs_lookup.c:418 namei(ffff8000371c1978) at namei+0x7aa sys/kern/vfs_lookup.c:250 unp_connect(ffff8000012f4800,fffffd806aadb000,ffff800030979720) at unp_connect+0x27d sys/kern/uipc_usrreq.c:862 uipc_dgram_send(ffff8000012f4800,fffffd806cd6c300,fffffd806aadb000,0) at uipc_dgram_send+0x131 sys/kern/uipc_usrreq.c:601 sosend(ffff8000012f4800,fffffd806aadb000,ffff8000371c1c08,0,0,0) at sosend+0xa43 sendit(ffff800030979720,3,ffff8000371c1d80,0,ffff8000371c1e40) at sendit+0x721 sys/kern/uipc_syscalls.c:786 sys_sendmsg(ffff800030979720,ffff8000371c1ef0,ffff8000371c1e40) at sys_sendmsg+0x246 sys/kern/uipc_syscalls.c:604 syscall(ffff8000371c1ef0) at syscall+0xbb6 mi_syscall sys/sys/syscall_mi.h:179 [inline] syscall(ffff8000371c1ef0) at syscall+0xbb6 sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x36d2d004a40, count: -15 ddb{1}> show registers rdi 0 rsi 0x40000 acpi_pdirpa+0x2be71 rbp 0xffff8000371c15d0 rbx 0xffffffff83061629 pp_r600_decoded_lanes+0x34594 rdx 0xffff8000011ac1c0 rcx 0xffff800030979720 rax 0x3ffff acpi_pdirpa+0x2be70 r8 0xffff8000371c14b0 r9 0x8080808080808080 r10 0x10db86579fdb1524 r11 0x1e2fa02ea02c7d70 r12 0xfffffd800429fd78 r13 0xfffffd8003ab7dc0 r14 0x3 r15 0xffffffff rip 0xffffffff816cefe5 db_enter+0x25 cs 0x8 rflags 0x246 rsp 0xffff8000371c15c0 ss 0x10 db_enter+0x25: addq $0x8,%rsp ddb{1}> show proc PROC (syz-executor) tid=210934 pid=99522 tcnt=2 stat=onproc flags process=8000000 proc=4000000 runpri=32, usrpri=50, slppri=32, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff800030978a78,0xffff800036f982c0 process=0xffff8000372ab1a8 user=0xffff8000371bc000, vmspace=0xfffffd807a25ba68 estcpu=36, cpticks=0, pctcpu=0.0, user=0, sys=0, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 89040 295738 89706 0 2 0x8000000 syz-executor 12760 417116 28614 0 7 0x8000000 syz-executor 12760 44393 28614 0 2 0xc000000 syz-executor 99522 128313 7123 0 2 0x8000000 syz-executor *99522 210934 7123 0 7 0xc000000 syz-executor 74799 109311 86911 -1 3 0x8000090 nanoslp syz-executor 74799 8084 86911 -1 3 0xc000090 netacc syz-executor 74799 357860 86911 -1 3 0xc000090 fsleep syz-executor 54254 339918 79127 0 3 0x8000080 nanoslp syz-executor 54254 373642 79127 0 3 0xc000080 pppxread syz-executor 54254 501613 79127 0 3 0xc000080 fsleep syz-executor 86911 44054 34355 0 3 0x8000082 nanoslp syz-executor 20683 195013 1 0 3 0x18100083 ttyin getty 26948 424773 34355 0 3 0x8000002 biowait syz-executor 85610 235245 34355 0 3 0x8000082 wait syz-executor 89706 198219 34355 0 3 0x8000082 nanoslp syz-executor 7123 325427 34355 0 3 0x8000082 nanoslp syz-executor 17366 285161 34355 0 3 0x8000082 wait syz-executor 28614 398941 34355 0 3 0x8000082 nanoslp syz-executor 79127 315070 34355 0 3 0x8000082 nanoslp syz-executor 18561 131541 0 0 3 0x14200 bored sosplice 34355 291188 44308 0 3 0x8000082 kqread syz-executor 44308 329165 42712 0 3 0x810008a sigsusp ksh 42712 469435 13654 0 3 0x18000098 kqread sshd-session 13654 519618 73093 0 3 0x18000092 kqread sshd-session 73093 423117 1 0 3 0x18000088 kqread sshd 52629 371963 64125 74 3 0x19100092 bpf pflogd 64125 21103 1 0 3 0x18000080 sbwait pflogd 21087 35139 2405 73 3 0x19100090 kqread syslogd 2405 132103 1 0 3 0x18100082 sbwait syslogd 7852 415631 1 0 3 0x18100080 kqread resolvd 24741 320827 46893 77 3 0x18100092 kqread dhcpleased 50789 406888 46893 77 3 0x18100092 kqread dhcpleased 46893 132460 1 0 3 0x18000080 kqread dhcpleased 19783 166841 0 0 3 0x14200 bored smr 22987 78373 0 0 3 0x14200 pgzero zerothread 60656 264610 0 0 3 0x14200 aiodoned aiodoned 5319 394529 0 0 3 0x14200 syncer update 23840 390250 0 0 3 0x14200 cleaner cleaner 3578 207805 0 0 3 0x14200 reaper reaper 3333 257451 0 0 3 0x14200 pgdaemon pagedaemon 93984 322139 0 0 3 0x14200 bored viomb 44976 434417 0 0 3 0x40014200 acpi0 acpi0 51593 306835 0 0 3 0x40014200 idle1 59166 278796 0 0 3 0x14200 bored softnet3 22972 299110 0 0 3 0x14200 bored softnet2 27474 300934 0 0 3 0x14200 bored softnet1 12882 512658 0 0 3 0x14200 bored softnet0 10372 209059 0 0 3 0x14200 bored systqmp 58414 424913 0 0 3 0x14200 bored systq 16769 168899 0 0 3 0x14200 tmoslp softclockmp 14051 443874 0 0 3 0x40014200 tmoslp softclock 50813 346923 0 0 3 0x40014200 idle0 1 116759 0 0 3 0x8080082 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{1}> show all locks Process 99522 (syz-executor) thread 0xffff800030979720 (210934) exclusive kernel_lock &kernel_lock r = 0 (0xffffffff834f5130) #0 witness_lock+0x5b8 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5b8 sys/kern/subr_witness.c:1151 #1 unp_connect+0x26c sys/kern/uipc_usrreq.c:862 #2 uipc_dgram_send+0x131 sys/kern/uipc_usrreq.c:601 #3 sosend+0xa43 #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:179 [inline] #6 syscall+0xbb6 sys/arch/amd64/amd64/trap.c:577 #7 Xsyscall+0x128 exclusive rwlock sbufsnd r = 0 (0xffff8000012f49a8) #0 witness_lock+0x5b8 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5b8 sys/kern/subr_witness.c:1151 #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:611 #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:179 [inline] #6 syscall+0xbb6 sys/arch/amd64/amd64/trap.c:577 #7 Xsyscall+0x128 Process 26948 (syz-executor) thread 0xffff8000371d0a60 (424773) exclusive rrwlock inode r = 0 (0xfffffd806a3030a8) #0 witness_lock+0x5b8 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5b8 sys/kern/subr_witness.c:1151 #1 rw_enter+0x41b sys/kern/kern_rwlock.c:309 #2 rrw_enter+0xbe sys/kern/kern_rwlock.c:464 #3 VOP_LOCK+0xa6 sys/kern/vfs_vops.c:524 #4 ufs_ihashins+0x4f sys/ufs/ufs/ufs_ihash.c:120 #5 ffs_vget+0x187 sys/ufs/ffs/ffs_vfsops.c:1230 #6 ffs_inode_alloc+0x283 sys/ufs/ffs/ffs_alloc.c:393 #7 ufs_mkdir+0x113 sys/ufs/ufs/ufs_vnops.c:1112 #8 VOP_MKDIR+0x102 sys/kern/vfs_vops.c:394 #9 domkdirat+0x179 sys/kern/vfs_syscalls.c:3104 #10 syscall+0xaf8 mi_syscall sys/sys/syscall_mi.h:179 [inline] #10 syscall+0xaf8 sys/arch/amd64/amd64/trap.c:577 #11 Xsyscall+0x128 exclusive rrwlock inode r = 0 (0xfffffd806a303c58) #0 witness_lock+0x5b8 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5b8 sys/kern/subr_witness.c:1151 #1 rw_enter+0x41b sys/kern/kern_rwlock.c:309 #2 rrw_enter+0xbe sys/kern/kern_rwlock.c:464 #3 VOP_LOCK+0xa6 sys/kern/vfs_vops.c:524 #4 vn_lock+0xa4 sys/kern/vfs_vnops.c:564 #5 vfs_lookup+0x109 sys/kern/vfs_lookup.c:418 #6 namei+0x7aa sys/kern/vfs_lookup.c:250 #7 domkdirat+0x8b sys/kern/vfs_syscalls.c:3089 #8 syscall+0xaf8 mi_syscall sys/sys/syscall_mi.h:179 [inline] #8 syscall+0xaf8 sys/arch/amd64/amd64/trap.c:577 #9 Xsyscall+0x128 ddb{1}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10239 10252K 10705K 166960K 17316 0 pcb 17 18K 20K 166960K 890 0 rtable 215 8K 9K 166960K 3426 0 pf 36 10K 10K 166960K 291 0 ifaddr 46 17K 17K 166960K 445 0 ifgroup 63 2K 2K 166960K 501 0 sysctl 4 1K 1K 166960K 4 0 counters 68 36K 37K 166960K 302 0 ioctlops 0 0K 4K 166960K 1742 0 iov 0 0K 24K 166960K 176 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1437 90K 91K 166960K 5360 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 10K 14K 166960K 73 0 VM map 2 1K 1K 166960K 2 0 sem 12 0K 0K 166960K 583 0 dirhash 15 2K 3K 166960K 69 0 ACPI 1697 195K 286K 166960K 12548 0 file desc 17 61K 97K 166960K 4724 0 sigio 0 0K 0K 166960K 115 0 proc 70 91K 140K 166960K 3222 0 subproc 104 6K 7K 166960K 1222 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 515 0 in_multi 89 6K 7K 166960K 1144 0 ether_multi 1 0K 0K 166960K 32 0 mrt 1 0K 0K 166960K 9 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 265 1182K 1182K 166960K 265 0 exec 0 0K 1K 166960K 1801 0 pfkey data 0 0K 0K 166960K 4 0 tdb 3 0K 0K 166960K 3 0 VM swap 8 62K 64K 166960K 10 0 UVM amap 242 101K 116K 166960K 40013 0 UVM aobj 141 8K 8K 166960K 197 0 pinsyscall 42 84K 106K 166960K 8060 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 1K 166960K 347 0 NDP 16 0K 2K 166960K 320 0 temp 75 6816K 14752K 166960K 129023 0 kqueue 13 20K 30K 166960K 507 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 120 688 0 685 5 2 3 3 0 8 2 rtentry 112 1223 0 1129 5 2 3 4 0 8 0 unpcb 144 4110 0 4092 32 28 4 6 0 8 3 syncache 336 3 0 3 1 1 0 1 0 8 0 tcpcb 808 1314 0 1307 34 30 4 8 0 8 3 arp 120 224 0 207 1 0 1 1 0 8 0 inpcb 384 5334 0 5323 97 89 8 18 0 8 6 nd6 136 320 0 296 3 2 1 2 0 8 0 pkpcb 40 7 0 7 6 5 1 1 0 8 1 kcovpl 48 94 0 86 1 0 1 1 0 8 0 ppxss 1168 21 0 21 9 8 1 1 0 8 1 pffrag 232 130 0 111 2 0 2 2 0 482 0 pffrnode 88 92 0 73 1 0 1 1 0 8 0 pffrent 40 349 0 330 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 24 469 0 376 1 0 1 1 0 8 0 pfstkey 128 469 0 376 5 1 4 4 0 8 0 pfstate 376 469 0 376 12 2 10 10 0 8 0 pfrule 1344 21 0 16 2 1 1 2 0 8 0 art_heap8 4096 2 0 0 2 0 2 2 0 8 0 art_heap4 256 4461 0 4042 38 11 27 30 0 8 0 art_table 32 4463 0 4042 4 0 4 4 0 8 0 art_node 16 1175 0 1090 1 0 1 1 0 8 0 sysvmsgpl 40 15 0 8 1 0 1 1 0 8 0 semapl 112 581 0 571 1 0 1 1 0 8 0 shmpl 112 194 0 56 4 0 4 4 0 8 0 dirhash 1024 56 0 37 3 0 3 3 0 8 0 dino2pl 256 7774 0 6103 105 0 105 105 0 8 0 ffsino 272 7774 0 6103 112 0 112 112 0 8 0 nchpl 144 13100 0 12379 66 38 28 66 0 8 0 uvmvnodes 80 6883 0 0 141 0 141 141 0 8 0 vnodes 216 6883 0 0 383 0 383 383 0 8 0 namei 1024 55656 0 55654 6 5 1 2 0 8 0 percpumem 16 165 0 117 1 0 1 1 0 8 0 vcpupl 3904 7 0 1 1 0 1 1 0 8 0 vmpool 696 17 0 11 1 0 1 1 0 8 0 kstatmem 264 262 0 234 4 1 3 3 0 8 0 scsiplug 72 4 0 4 4 4 0 1 0 8 0 scxspl 216 75858 0 75857 29 28 1 8 1 8 0 plimitpl 152 1204 0 1186 1 0 1 1 0 8 0 sigapl 424 4884 0 4834 10 1 9 9 0 8 2 futexpl 64 69675 0 69673 8 7 1 1 0 8 0 knotepl 120 799 0 0 17 0 17 17 0 8 0 kqueuepl 216 1429 0 1420 22 19 3 5 0 8 2 pipepl 320 832 0 804 10 7 3 6 0 8 0 fdescpl 496 4842 0 4811 7 2 5 6 0 8 0 filepl 152 34523 0 34265 80 64 16 22 0 8 5 lockfpl 104 1774 0 1771 2 1 1 2 0 8 0 lockfspl 48 594 0 591 1 0 1 1 0 8 0 sessionpl 144 118 0 109 1 0 1 1 0 8 0 pgrppl 48 241 0 224 1 0 1 1 0 8 0 ucredpl 104 5826 0 5812 1 0 1 1 0 8 0 zombiepl 144 4836 0 4834 1 0 1 1 0 8 0 processpl 1152 4884 0 4834 6 0 6 6 0 8 1 procpl 648 9884 0 9828 12 4 8 8 0 8 1 srpgc 96 18 0 18 8 7 1 1 0 8 1 sosppl 168 8 0 8 5 5 0 1 0 8 0 sockpl 664 10181 0 10149 122 111 11 26 0 8 7 mcl64k 65536 17 0 0 3 0 3 3 0 8 0 mcl16k 16384 17 0 0 3 0 3 3 0 8 0 mcl12k 12288 13 0 0 2 0 2 2 0 8 0 mcl9k 9216 16 0 0 2 0 2 2 0 8 0 mcl8k 8192 17 0 0 3 0 3 3 0 8 0 mcl4k 4096 17 0 0 3 0 3 3 0 8 0 mcl2k2 2112 2 0 0 1 0 1 1 0 8 0 mcl2k 2048 342 0 0 33 1 32 33 0 8 0 mtagpl 96 168 0 0 4 1 3 4 0 8 0 mbufpl 256 698 0 0 27 0 27 27 0 8 0 bufpl 280 14481 0 7597 492 0 492 492 0 8 0 anonpl 24 595109 0 589875 118 71 47 53 0 185 8 amapchunkpl 152 128731 0 128190 87 60 27 32 0 158 2 amappl16 200 10434 0 10373 88 77 11 15 0 8 5 amappl15 192 22 0 22 1 1 0 1 0 8 0 amappl14 184 303 0 291 1 0 1 1 0 8 0 amappl13 176 12 0 12 1 1 0 1 0 8 0 amappl12 168 6864 0 6834 4 2 2 3 0 8 0 amappl11 160 56 0 42 1 0 1 1 0 8 0 amappl10 152 15 0 15 1 1 0 1 0 8 0 amappl9 144 122 0 122 1 1 0 1 0 8 0 amappl8 136 52 0 49 1 0 1 1 0 8 0 amappl7 128 302 0 289 1 0 1 1 0 8 0 amappl6 120 1025 0 1023 1 0 1 1 0 8 0 amappl5 112 495 0 483 1 0 1 1 0 8 0 amappl4 104 639 0 616 1 0 1 1 0 8 0 amappl3 96 26851 0 26742 4 0 4 4 0 8 0 amappl2 88 1876 0 1810 2 0 2 2 0 8 0 amappl1 80 27022 0 26439 15 2 13 15 0 8 0 amappl 88 38788 0 38612 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 128 253 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 72 196 0 56 3 0 3 3 0 8 0 uaddrrnd 24 4859 0 4822 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 4859 0 4822 1 0 1 1 0 8 0 vmmpekpl 168 37444 0 37388 4 0 4 4 0 8 0 vmmpepl 168 290013 0 288075 152 55 97 97 0 357 8 vmsppl 440 4858 0 4822 8 3 5 5 0 8 0 rwobjpl 56 79654 0 71642 122 5 117 117 0 8 3 pdppl 4096 9725 0 9650 295 216 79 87 0 8 4 pvpl 32 29096 0 0 233 1 232 233 0 265 0 pmappl 248 4858 0 4822 3 0 3 3 0 8 0 extentpl 40 56 0 38 1 0 1 1 0 8 0 phpool 112 680 0 274 12 0 12 12 0 8 0 ddb{1}> machine ddbcpu 0 Stopped at x86_ipi_db+0x27: addq $0x8,%rsp ddb{0}> trace x86_ipi_db(ffffffff8343eff0) 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(ffffffff834f4f28) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:113 [inline] __mp_lock(ffffffff834f4f28) at __mp_lock+0x192 sys/kern/kern_lock.c:144 intr_handler(ffff80002a12e8e0,ffff800000069c00) at intr_handler+0xe1 sys/arch/amd64/amd64/intr.c:553 Xintr_ioapic_edge16_untramp() at Xintr_ioapic_edge16_untramp+0x18f __mp_lock(ffffffff834f4f28) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:113 [inline] __mp_lock(ffffffff834f4f28) at __mp_lock+0x192 sys/kern/kern_lock.c:144 intr_handler(ffff80002a12ea40,ffff80000006c000) at intr_handler+0xe1 sys/arch/amd64/amd64/intr.c:553 Xintr_ioapic_edge25_untramp() at Xintr_ioapic_edge25_untramp+0x18f __mp_lock(ffffffff834f4f28) at __mp_lock+0x199 __mp_lock_spin sys/kern/kern_lock.c:113 [inline] __mp_lock(ffffffff834f4f28) at __mp_lock+0x199 sys/kern/kern_lock.c:144 intr_handler(ffff80002a12eba0,ffff80000006bc00) 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: 0x7ef97443fbc0, count: -12 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(fffffd8061466d68,9,0) at witness_checkorder+0x1024 rw_enter(fffffd8061466d58,1) at rw_enter+0x122 rrw_enter(fffffd8061466d58,1) at rrw_enter+0xbe sys/kern/kern_rwlock.c:464 VOP_LOCK(fffffd806896a1b8,2001) at VOP_LOCK+0xa6 sys/kern/vfs_vops.c:524 vn_lock(fffffd806896a1b8,2001) at vn_lock+0xa4 sys/kern/vfs_vnops.c:564 vfs_lookup(ffff8000371c1978) at vfs_lookup+0x109 sys/kern/vfs_lookup.c:418 namei(ffff8000371c1978) at namei+0x7aa sys/kern/vfs_lookup.c:250 unp_connect(ffff8000012f4800,fffffd806aadb000,ffff800030979720) at unp_connect+0x27d sys/kern/uipc_usrreq.c:862 uipc_dgram_send(ffff8000012f4800,fffffd806cd6c300,fffffd806aadb000,0) at uipc_dgram_send+0x131 sys/kern/uipc_usrreq.c:601 sosend(ffff8000012f4800,fffffd806aadb000,ffff8000371c1c08,0,0,0) at sosend+0xa43 sendit(ffff800030979720,3,ffff8000371c1d80,0,ffff8000371c1e40) at sendit+0x721 sys/kern/uipc_syscalls.c:786 sys_sendmsg(ffff800030979720,ffff8000371c1ef0,ffff8000371c1e40) at sys_sendmsg+0x246 sys/kern/uipc_syscalls.c:604 syscall(ffff8000371c1ef0) at syscall+0xbb6 mi_syscall sys/sys/syscall_mi.h:179 [inline] syscall(ffff8000371c1ef0) at syscall+0xbb6 sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x36d2d004a40, count: -15