login: witness: lock order reversal: 1st 0xffff800001302eb8 sbufsnd (&so->so_snd.sb_lock) 2nd 0xfffffd806f1eb3d0 inode (&ip->i_lock) lock order [1] sbufsnd (&so->so_snd.sb_lock) -> [2] inode (&ip->i_lock) lock order data 0xffffffff830beb84 -> 0xffffffff83071f68 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(fffffd806f1eb3d0,9,0) at witness_checkorder+0x1047 rw_enter(fffffd806f1eb3c0,1) at rw_enter+0x122 rrw_enter(fffffd806f1eb3c0,1) at rrw_enter+0xbe sys/kern/kern_rwlock.c:464 VOP_LOCK(fffffd80663aa5e8,2001) at VOP_LOCK+0xa6 sys/kern/vfs_vops.c:524 vn_lock(fffffd80663aa5e8,2001) at vn_lock+0xa4 sys/kern/vfs_vnops.c:564 vfs_lookup(ffff8000371f6d88) at vfs_lookup+0x109 sys/kern/vfs_lookup.c:418 namei(ffff8000371f6d88) at namei+0x7aa sys/kern/vfs_lookup.c:250 unp_connect(ffff800001302d10,fffffd806cb2a500,ffff800032f9ca48) at unp_connect+0x27d sys/kern/uipc_usrreq.c:868 uipc_dgram_send(ffff800001302d10,fffffd807eb7db00,fffffd806cb2a500,0) at uipc_dgram_send+0x131 sys/kern/uipc_usrreq.c:607 sosend(ffff800001302d10,fffffd806cb2a500,ffff8000371f7018,0,0,8) at sosend+0xa40 sendit(ffff800032f9ca48,4,ffff8000371f7190,8,ffff8000371f7250) at sendit+0x721 sys/kern/uipc_syscalls.c:786 sys_sendmsg(ffff800032f9ca48,ffff8000371f7300,ffff8000371f7250) at sys_sendmsg+0x246 sys/kern/uipc_syscalls.c:604 syscall(ffff8000371f7300) at syscall+0xbb6 mi_syscall sys/sys/syscall_mi.h:178 [inline] syscall(ffff8000371f7300) at syscall+0xbb6 sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x665d41756b0, count: -15 ddb{1}> show registers rdi 0 rsi 0x40000 acpi_pdirpa+0x2be71 rbp 0xffff8000371f69e0 rbx 0xfffffd80042c88a0 rdx 0xffff8000012b8900 rcx 0xffff800032f9ca48 rax 0x3ffff acpi_pdirpa+0x2be70 r8 0xffff8000371f68c0 r9 0x8080808080808080 r10 0x3cac5d4e19e0c074 r11 0xcfa6dc7563daf037 r12 0 r13 0xfffffd8003adfe00 r14 0x3 r15 0xffffffff rip 0xffffffff812ecd15 db_enter+0x25 cs 0x8 rflags 0x246 rsp 0xffff8000371f69d0 ss 0x10 db_enter+0x25: addq $0x8,%rsp ddb{1}> show proc PROC (syz-executor) tid=391294 pid=88510 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=0xffff800032f9d978,0xffffffff83509350 process=0xffff8000371d0db8 user=0xffff8000371f2000, vmspace=0xfffffd8069b411e8 estcpu=36, cpticks=0, pctcpu=0.0, user=0, sys=0, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 88510 21158 11082 0 7 0 syz-executor *88510 391294 11082 0 7 0x4000000 syz-executor 53808 278178 34015 0 2 0 syz-executor 53808 248659 34015 0 3 0x4000080 fsleep syz-executor 61077 403834 24919 0 2 0 syz-executor 61077 176823 24919 0 3 0x4000080 lockf syz-executor 61077 493519 24919 0 3 0x4000080 kqread syz-executor 61077 114755 24919 0 3 0x4000080 kqread syz-executor 32028 407754 32314 0 3 0x1000090 nanoslp syz-executor 32028 315331 32314 0 3 0x5000090 sbwait syz-executor 32028 252734 32314 0 3 0x5000090 fsleep syz-executor 32028 380912 32314 0 3 0x5000090 fsleep syz-executor 86065 51382 61317 0 3 0x80 nanoslp syz-executor 86065 211186 61317 0 3 0x4000080 pipewr syz-executor 86065 4455 61317 0 3 0x4000080 pipewr syz-executor 86065 423050 61317 0 3 0x4000080 fsleep syz-executor 24919 519938 83744 0 3 0x82 nanoslp syz-executor 42529 376077 1 0 3 0x100083 ttyin getty 38001 400627 0 0 3 0x14200 bored sosplice 11082 202050 83744 0 3 0x82 nanoslp syz-executor 15264 150976 83744 0 3 0x2 biowait syz-executor 30018 389696 83744 0 2 0x2 syz-executor 34015 88466 83744 0 3 0x82 nanoslp syz-executor 93487 307628 83744 0 3 0x82 nanoslp syz-executor 32314 203863 83744 0 3 0x82 nanoslp syz-executor 61317 71845 83744 0 3 0x82 nanoslp syz-executor 83744 226452 66327 0 2 0x2 syz-executor 66327 324814 72313 0 3 0x10008a sigsusp ksh 72313 79780 19381 0 3 0x98 kqread sshd-session 19381 211720 56707 0 3 0x92 kqread sshd-session 56707 418494 1 0 3 0x88 kqread sshd 45101 309761 33845 74 3 0x1100092 bpf pflogd 33845 25017 1 0 3 0x80 sbwait pflogd 24347 160363 4705 73 3 0x1100090 kqread syslogd 4705 321968 1 0 3 0x100082 sbwait syslogd 75621 204 1 0 3 0x100080 kqread resolvd 84896 317936 98086 77 3 0x100092 kqread dhcpleased 72608 202515 98086 77 3 0x100092 kqread dhcpleased 98086 208710 1 0 3 0x80 kqread dhcpleased 93139 303653 0 0 3 0x14200 bored smr 7021 186867 0 0 2 0x14200 zerothread 22343 511549 0 0 3 0x14200 aiodoned aiodoned 4385 77778 0 0 3 0x14200 syncer update 46957 243287 0 0 3 0x14200 cleaner cleaner 45883 208390 0 0 3 0x14200 reaper reaper 13408 475635 0 0 3 0x14200 pgdaemon pagedaemon 57515 13230 0 0 3 0x14200 bored viomb 71137 107276 0 0 3 0x40014200 acpi0 acpi0 19438 470725 0 0 3 0x40014200 idle1 21326 333715 0 0 3 0x14200 bored softnet3 808 73477 0 0 3 0x14200 bored softnet2 29464 458376 0 0 3 0x14200 bored softnet1 90737 94612 0 0 3 0x14200 bored softnet0 22772 7657 0 0 3 0x14200 bored systqmp 49705 294188 0 0 3 0x14200 bored systq 2247 483075 0 0 3 0x14200 tmoslp softclockmp 76549 152706 0 0 3 0x40014200 tmoslp softclock 92407 34876 0 0 3 0x40014200 idle0 1 180310 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{1}> show all locks Process 88510 (syz-executor) thread 0xffff800032f9ca48 (391294) exclusive kernel_lock &kernel_lock r = 0 (0xffffffff836258d8) #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 (0xffff800001302eb8) #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 Process 15264 (syz-executor) thread 0xffff8000ffff6cc8 (150976) exclusive rrwlock inode r = 0 (0xfffffd8079d39920) #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 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:169 #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:3099 #10 syscall+0xaf8 mi_syscall sys/sys/syscall_mi.h:178 [inline] #10 syscall+0xaf8 sys/arch/amd64/amd64/trap.c:577 #11 Xsyscall+0x128 exclusive rrwlock inode r = 0 (0xfffffd806ca592b8) #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 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:3084 #8 syscall+0xaf8 mi_syscall sys/sys/syscall_mi.h:178 [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 10207 11150K 11584K 166960K 11731 0 pcb 17 14K 16K 166960K 146 0 rtable 213 6K 6K 166960K 428 0 pf 35 17K 19K 166960K 57 0 ifaddr 39 6K 7K 166960K 56 0 ifgroup 58 2K 2K 166960K 71 0 sysctl 3 0K 0K 166960K 3 0 counters 64 36K 36K 166960K 72 0 ioctlops 0 0K 4K 166960K 1502 0 iov 0 0K 16K 166960K 23 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1434 90K 90K 166960K 1805 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 12 0K 0K 166960K 17 0 dirhash 12 2K 2K 166960K 15 0 ACPI 1690 195K 286K 166960K 12468 0 file desc 16 57K 93K 166960K 474 0 sigio 0 0K 0K 166960K 5 0 proc 72 91K 115K 166960K 622 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 33 0 in_multi 84 6K 7K 166960K 129 0 ether_multi 1 0K 0K 166960K 2 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 79 360K 360K 166960K 79 0 exec 0 0K 1K 166960K 413 0 fusefs mount 1 32K 32K 166960K 1 0 pfkey data 0 0K 0K 166960K 1 0 tdb 3 0K 0K 166960K 3 0 VM swap 8 62K 64K 166960K 10 0 UVM amap 236 72K 76K 166960K 6112 0 UVM aobj 18 4K 4K 166960K 19 0 pinsyscall 41 82K 104K 166960K 1583 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 21 0 NDP 14 0K 2K 166960K 36 0 temp 56 6822K 6887K 166960K 13625 0 kqueue 15 24K 28K 166960K 64 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 120 120 0 117 3 0 3 3 0 8 2 rtentry 112 136 0 38 4 0 4 4 0 8 0 unpcb 144 296 0 276 4 0 4 4 0 8 3 syncache 336 3 0 3 2 2 0 1 0 8 0 tcpcb 808 87 0 82 1 0 1 1 0 8 0 arp 120 23 0 6 1 0 1 1 0 8 0 inpcb 336 468 0 458 7 0 7 7 0 8 5 nd6 136 29 0 10 1 0 1 1 0 8 0 pkpcb 40 3 0 3 1 0 1 1 0 8 1 kcovpl 48 9 0 1 1 0 1 1 0 8 0 ppxss 1168 2 0 2 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 2 0 1 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 36 0 0 1 0 1 1 0 8 0 pfstkey 128 36 0 0 2 0 2 2 0 8 0 pfstate 376 36 0 0 4 0 4 4 0 8 0 pfrule 1344 22 0 16 2 0 2 2 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 545 0 151 30 0 30 30 0 8 5 art_table 32 546 0 151 4 0 4 4 0 8 0 art_node 16 134 0 46 1 0 1 1 0 8 0 sysvmsgpl 40 5 0 2 1 0 1 1 0 8 0 semapl 112 15 0 5 1 0 1 1 0 8 0 shmpl 112 16 0 1 1 0 1 1 0 8 0 dirhash 1024 19 0 2 3 0 3 3 0 8 0 dino2pl 256 2268 0 764 95 0 95 95 0 8 0 ffsino 272 2268 0 764 102 0 102 102 0 8 0 nchpl 144 2936 0 1245 63 0 63 63 0 8 0 uvmvnodes 80 2588 0 0 53 0 53 53 0 8 0 vnodes 216 2588 0 0 144 0 144 144 0 8 0 namei 1024 9941 0 9939 2 0 2 2 0 8 1 percpumem 16 50 0 4 1 0 1 1 0 8 0 kstatmem 264 32 0 8 2 0 2 2 0 8 0 scxspl 216 8047 0 8046 3 2 1 2 1 8 0 plimitpl 152 129 0 112 1 0 1 1 0 8 0 sigapl 424 775 0 726 8 1 7 7 0 8 1 futexpl 64 5212 0 5208 1 0 1 1 0 8 0 knotepl 120 519 0 0 16 0 16 16 0 8 0 kqueuepl 216 104 0 93 2 0 2 2 0 8 1 pipepl 320 141 0 113 3 0 3 3 0 8 0 fdescpl 496 756 0 726 5 0 5 5 0 8 0 filepl 152 4205 0 3942 16 0 16 16 0 8 4 lockfpl 104 130 0 126 1 0 1 1 0 8 0 lockfspl 48 60 0 57 1 0 1 1 0 8 0 sessionpl 144 24 0 15 1 0 1 1 0 8 0 pgrppl 48 36 0 19 1 0 1 1 0 8 0 ucredpl 104 813 0 799 1 0 1 1 0 8 0 zombiepl 144 727 0 726 1 0 1 1 0 8 0 processpl 1160 775 0 726 5 0 5 5 0 8 1 procpl 648 1328 0 1268 7 1 6 6 0 8 0 srpgc 96 2 0 2 1 0 1 1 0 8 1 sosppl 168 9 0 9 1 0 1 1 0 8 1 sockpl 664 893 0 860 9 0 9 9 0 8 5 mcl64k 65536 2 0 0 1 0 1 1 0 8 0 mcl16k 16384 4 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 155 0 0 20 0 20 20 0 8 0 mcl2k 2048 23 0 0 3 0 3 3 0 8 0 mtagpl 96 11 0 0 1 0 1 1 0 8 0 mbufpl 256 170 0 0 11 0 11 11 0 8 0 bufpl 280 4839 0 99 339 0 339 339 0 8 0 anonpl 24 235855 0 232248 47 0 47 47 0 185 16 amapchunkpl 152 20753 0 20252 28 0 28 28 0 158 6 amappl16 200 6962 0 6937 23 8 15 15 0 8 11 amappl15 192 17 0 17 1 1 0 1 0 8 0 amappl14 184 123 0 111 1 0 1 1 0 8 0 amappl13 176 17 0 17 1 1 0 1 0 8 0 amappl12 168 1423 0 1393 3 1 2 2 0 8 0 amappl11 160 64 0 50 1 0 1 1 0 8 0 amappl10 152 13 0 13 1 1 0 1 0 8 0 amappl9 144 127 0 127 1 1 0 1 0 8 0 amappl8 136 29 0 26 1 0 1 1 0 8 0 amappl7 128 117 0 105 1 0 1 1 0 8 0 amappl6 120 184 0 181 1 0 1 1 0 8 0 amappl5 112 145 0 133 1 0 1 1 0 8 0 amappl4 104 326 0 307 1 0 1 1 0 8 0 amappl3 96 3764 0 3667 3 0 3 3 0 8 0 amappl2 88 1036 0 951 3 0 3 3 0 8 1 amappl1 80 8614 0 8053 14 0 14 14 0 8 1 amappl 88 5709 0 5535 5 0 5 5 0 92 0 dma65536 65536 1 0 1 1 0 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 128 253 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 18 0 1 1 0 1 1 0 8 0 uaddrrnd 24 756 0 726 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 756 0 726 1 0 1 1 0 8 0 vmmpekpl 168 7420 0 7382 3 0 3 3 0 8 0 vmmpepl 168 56879 0 55054 94 0 94 94 0 357 5 vmsppl 448 755 0 726 6 1 5 5 0 8 1 rwobjpl 56 23961 0 20424 52 0 52 52 0 8 2 pdppl 4096 1519 0 1452 101 28 73 85 0 8 6 pvpl 32 14234 0 0 115 0 115 115 0 265 0 pmappl 248 755 0 726 3 0 3 3 0 8 0 extentpl 40 55 0 38 1 0 1 1 0 8 0 phpool 112 392 0 33 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(ffffffff8348eff0) 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(ffffffff836256d0) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:113 [inline] __mp_lock(ffffffff836256d0) at __mp_lock+0x192 sys/kern/kern_lock.c:144 intr_handler(ffff80002a0e1e60,ffff800000069c00) at intr_handler+0xe1 sys/arch/amd64/amd64/intr.c:553 Xintr_ioapic_edge16_untramp() at Xintr_ioapic_edge16_untramp+0x18f __mp_lock(ffffffff836256d0) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:113 [inline] __mp_lock(ffffffff836256d0) at __mp_lock+0x192 sys/kern/kern_lock.c:144 intr_handler(ffff80002a0e1fc0,ffff800000079e00) at intr_handler+0xe1 sys/arch/amd64/amd64/intr.c:553 Xintr_ioapic_edge25_untramp() at Xintr_ioapic_edge25_untramp+0x18f __mp_lock(ffffffff836256d0) at __mp_lock+0x199 __mp_lock_spin sys/kern/kern_lock.c:113 [inline] __mp_lock(ffffffff836256d0) at __mp_lock+0x199 sys/kern/kern_lock.c:144 intr_handler(ffff80002a0e2120,ffff800000079f80) at intr_handler+0xe1 sys/arch/amd64/amd64/intr.c:553 Xintr_ioapic_edge23_untramp() at Xintr_ioapic_edge23_untramp+0x18f __mp_lock(ffffffff836256d0) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:113 [inline] __mp_lock(ffffffff836256d0) 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: 0x722ce5fabab0, count: -15 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(fffffd806f1eb3d0,9,0) at witness_checkorder+0x1047 rw_enter(fffffd806f1eb3c0,1) at rw_enter+0x122 rrw_enter(fffffd806f1eb3c0,1) at rrw_enter+0xbe sys/kern/kern_rwlock.c:464 VOP_LOCK(fffffd80663aa5e8,2001) at VOP_LOCK+0xa6 sys/kern/vfs_vops.c:524 vn_lock(fffffd80663aa5e8,2001) at vn_lock+0xa4 sys/kern/vfs_vnops.c:564 vfs_lookup(ffff8000371f6d88) at vfs_lookup+0x109 sys/kern/vfs_lookup.c:418 namei(ffff8000371f6d88) at namei+0x7aa sys/kern/vfs_lookup.c:250 unp_connect(ffff800001302d10,fffffd806cb2a500,ffff800032f9ca48) at unp_connect+0x27d sys/kern/uipc_usrreq.c:868 uipc_dgram_send(ffff800001302d10,fffffd807eb7db00,fffffd806cb2a500,0) at uipc_dgram_send+0x131 sys/kern/uipc_usrreq.c:607 sosend(ffff800001302d10,fffffd806cb2a500,ffff8000371f7018,0,0,8) at sosend+0xa40 sendit(ffff800032f9ca48,4,ffff8000371f7190,8,ffff8000371f7250) at sendit+0x721 sys/kern/uipc_syscalls.c:786 sys_sendmsg(ffff800032f9ca48,ffff8000371f7300,ffff8000371f7250) at sys_sendmsg+0x246 sys/kern/uipc_syscalls.c:604 syscall(ffff8000371f7300) at syscall+0xbb6 mi_syscall sys/sys/syscall_mi.h:178 [inline] syscall(ffff8000371f7300) at syscall+0xbb6 sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x665d41756b0, count: -15