witness: lock order reversal: 1st 0xffff800010fca7c8 sbufsnd (&so->so_snd.sb_lock) 2nd 0xfffffd807b1d09a0 inode (&ip->i_lock) lock order [1] sbufsnd (&so->so_snd.sb_lock) -> [2] inode (&ip->i_lock) lock order data 0xffffffff833fd222 -> 0xffffffff833a5512 is missing lock order [2] inode (&ip->i_lock) -> [3] 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 lock order [3] sbufrcv (&so->so_rcv.sb_lock) -> [1] sbufsnd (&so->so_snd.sb_lock) #0 rw_do_enter_write+0xb7 sys/kern/kern_rwlock.c:233 #1 sblock+0xb7 sys/kern/uipc_socket2.c:536 #2 sosplice+0x40d sys/kern/uipc_socket.c:1364 #3 sys_setsockopt+0x2ba sys/kern/uipc_syscalls.c:1221 #4 syscall+0xbc6 mi_syscall sys/sys/syscall_mi.h:176 [inline] #4 syscall+0xbc6 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:438 witness_checkorder(fffffd807b1d09a0,9,0) at witness_checkorder+0x1047 rw_do_enter_write(fffffd807b1d0988,1) at rw_do_enter_write+0xb7 sys/kern/kern_rwlock.c:233 rrw_enter(fffffd807b1d0988,1) at rrw_enter+0xc6 sys/kern/kern_rwlock.c:616 VOP_LOCK(fffffd805e0602c8,2001) at VOP_LOCK+0xa6 sys/kern/vfs_vops.c:524 vn_lock(fffffd805e0602c8,2001) at vn_lock+0xa4 sys/kern/vfs_vnops.c:570 vfs_lookup(ffff800034cb9df8) at vfs_lookup+0x109 sys/kern/vfs_lookup.c:418 namei(ffff800034cb9df8) at namei+0x7aa sys/kern/vfs_lookup.c:250 unp_connect(ffff800010fca608,fffffd805e7c0d00,ffff8000350a4030) at unp_connect+0x27d sys/kern/uipc_usrreq.c:868 uipc_dgram_send(ffff800010fca608,fffffd806be6d700,fffffd805e7c0d00,0) at uipc_dgram_send+0x131 sys/kern/uipc_usrreq.c:607 sosend(ffff800010fca608,fffffd805e7c0d00,ffff800034cba078,0,0,8) at sosend+0x804 sendit(ffff8000350a4030,3,ffff800034cba1f0,8,ffff800034cba2b0) at sendit+0x721 sys/kern/uipc_syscalls.c:779 sys_sendmsg(ffff8000350a4030,ffff800034cba360,ffff800034cba2b0) at sys_sendmsg+0x246 sys/kern/uipc_syscalls.c:597 syscall(ffff800034cba360) at syscall+0xbc6 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff800034cba360) at syscall+0xbc6 sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x412358c2810, count: -15 ddb{1}> show registers rdi 0 rsi 0x80000 acpi_pdirpa+0x6be71 rbp 0xffff800034cb9a70 rbx 0xfffffd800470ce88 rdx 0xffff8000014df980 rcx 0xffff8000350a4030 rax 0x7ffff acpi_pdirpa+0x6be70 r8 0xffff800034cb9950 r9 0x8080808080808080 r10 0x47f8de4d4d939864 r11 0xb3025df971573f40 r12 0 r13 0xfffffd8003f24f00 r14 0x3 r15 0xffffffff rip 0xffffffff810240e5 db_enter+0x25 cs 0x8 rflags 0x246 rsp 0xffff800034cb9a60 ss 0x10 db_enter+0x25: addq $0x8,%rsp ddb{1}> show proc PROC (syz-executor) tid=3191 pid=7923 tcnt=2 stat=onproc flags process=0 proc=4000000 runpri=32, usrpri=86, slppri=32, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff8000350a47e0,0xffff8000350a5c70 process=0xffff8000ffff2048 user=0xffff800034cb5000, vmspace=0xfffffd806bea9018 estcpu=36, cpticks=0, pctcpu=0.0, user=0, sys=0, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 27351 330744 44581 0 7 0 syz-executor 90849 203410 83295 0 2 0 syz-executor 90849 213831 83295 0 3 0x4000080 fsleep syz-executor 90849 423213 83295 0 3 0x4000080 fsleep syz-executor 7923 516626 48623 0 2 0 syz-executor * 7923 3191 48623 0 7 0x4000000 syz-executor 5814 370740 1 0 3 0x82 nanoslp getty 22098 328159 610 0 2 0 syz-executor 22098 102254 610 0 3 0x4000080 pipewr syz-executor 22098 457543 610 0 3 0x4000080 fsleep syz-executor 22098 260402 610 0 3 0x4000080 fsleep syz-executor 22098 333124 610 0 3 0x4000080 fsleep syz-executor 91615 53889 49134 0 3 0x80 nanoslp syz-executor 91615 309481 49134 0 3 0x4000080 fsleep syz-executor 91615 261575 49134 0 3 0x4000080 pipewr syz-executor 41434 352230 92454 0 2 0 syz-executor 41434 293001 92454 0 3 0x4000080 ttyout syz-executor 41434 111185 92454 0 3 0x4000080 fsleep syz-executor 610 450522 44237 0 3 0x82 nanoslp syz-executor 48623 394106 44237 0 3 0x82 nanoslp syz-executor 56625 223349 0 0 3 0x14200 bored sosplice 53095 502064 44237 0 3 0x2 biowait syz-executor 92454 43636 44237 0 3 0x82 nanoslp syz-executor 99426 385192 44237 0 3 0x82 wait syz-executor 44581 76404 44237 0 3 0x82 nanoslp syz-executor 83295 317436 44237 0 3 0x82 nanoslp syz-executor 49134 249690 44237 0 2 0x2 syz-executor 44237 241692 24789 0 3 0x82 kqread syz-executor 24789 57654 47375 0 3 0x10008a sigsusp ksh 47375 111689 31416 0 3 0x98 kqread sshd-session 31416 372003 19111 0 3 0x92 kqread sshd-session 19111 509097 1 0 3 0x88 kqread sshd 10747 192538 82338 74 3 0x1100092 bpf pflogd 82338 486514 1 0 3 0x80 sbwait pflogd 66269 502287 72998 73 3 0x1100090 kqread syslogd 72998 156161 1 0 3 0x100082 sbwait syslogd 96199 78737 1 0 3 0x100080 kqread resolvd 18413 99322 29085 77 3 0x100092 kqread dhcpleased 39563 511139 29085 77 3 0x100092 kqread dhcpleased 29085 147399 1 0 3 0x80 kqread dhcpleased 96541 343812 0 0 3 0x14200 bored smr 77993 54425 0 0 2 0x14200 zerothread 49828 370226 0 0 3 0x14200 aiodoned aiodoned 95683 377723 0 0 3 0x14200 syncer update 45170 204761 0 0 3 0x14200 cleaner cleaner 96468 390128 0 0 3 0x14200 reaper reaper 52379 181100 0 0 3 0x14200 pgdaemon pagedaemon 8772 111392 0 0 3 0x14200 bored viomb 89864 391505 0 0 3 0x40014200 acpi0 acpi0 36738 420707 0 0 3 0x40014200 idle1 21950 78141 0 0 3 0x14200 bored softnet3 67204 224288 0 0 3 0x14200 bored softnet2 5903 74977 0 0 3 0x14200 bored softnet1 38803 346712 0 0 2 0x14200 softnet0 81057 159219 0 0 3 0x14200 bored systqmp 68133 28243 0 0 3 0x14200 bored systq 29992 431061 0 0 3 0x14200 tmoslp softclockmp 50133 185010 0 0 3 0x40014200 tmoslp softclock 11766 185824 0 0 3 0x40014200 idle0 1 176489 0 0 3 0x82 wait init 0 0 -1 0 3 0x10010200 scheduler swapper ddb{1}> show all locks Process 7923 (syz-executor) thread 0xffff8000350a4030 (3191) 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_connect+0x26c sys/kern/uipc_usrreq.c:868 #2 uipc_dgram_send+0x131 sys/kern/uipc_usrreq.c:607 #3 sosend+0x804 #4 sendit+0x721 sys/kern/uipc_syscalls.c:779 #5 sys_sendmsg+0x246 sys/kern/uipc_syscalls.c:597 #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 exclusive rwlock sbufsnd r = 0 (0xffff800010fca7c8) #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 sosend+0x2e2 sys/kern/uipc_socket.c:631 #4 sendit+0x721 sys/kern/uipc_syscalls.c:779 #5 sys_sendmsg+0x246 sys/kern/uipc_syscalls.c:597 #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 53095 (syz-executor) thread 0xffff80002a2f8a48 (502064) exclusive rrwlock inode r = 0 (0xfffffd806b8cb730) #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 ufs_ihashins+0x4f sys/ufs/ufs/ufs_ihash.c:159 #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:3117 #10 syscall+0xb08 mi_syscall sys/sys/syscall_mi.h:176 [inline] #10 syscall+0xb08 sys/arch/amd64/amd64/trap.c:577 #11 Xsyscall+0x128 exclusive rrwlock inode r = 0 (0xfffffd806cafa1f0) #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 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:3102 #8 syscall+0xb08 mi_syscall sys/sys/syscall_mi.h:176 [inline] #8 syscall+0xb08 sys/arch/amd64/amd64/trap.c:577 #9 Xsyscall+0x128 ddb{1}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10206 11102K 11405K 166960K 13039 0 pcb 17 16K 18K 166960K 362 0 rtable 193 11K 11K 166960K 630 0 pf 46 20K 28K 166960K 166 0 ifaddr 37 6K 8K 166960K 115 0 ifgroup 53 2K 2K 166960K 189 0 sysctl 3 1K 1K 166960K 3 0 counters 64 36K 37K 166960K 184 0 ioctlops 0 0K 4K 166960K 1666 0 iov 0 0K 16K 166960K 77 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1389 87K 88K 166960K 2741 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 5K 166960K 19 0 VM map 2 1K 1K 166960K 2 0 sem 12 0K 0K 166960K 94 0 dirhash 12 2K 2K 166960K 39 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 17 61K 106K 166960K 1511 0 sigio 0 0K 0K 166960K 22 0 proc 72 91K 128K 166960K 813 0 subproc 72 4K 4K 166960K 99 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 208 0 in_multi 74 5K 7K 166960K 199 0 ether_multi 1 0K 0K 166960K 9 0 mrt 1 0K 0K 166960K 3 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 649 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 236 77K 87K 166960K 15706 0 UVM aobj 36 2K 4K 166960K 42 0 pinsyscall 42 84K 106K 166960K 2810 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 73 0 NDP 12 0K 2K 166960K 71 0 temp 78 8648K 8904K 166960K 50497 0 kqueue 14 22K 30K 166960K 284 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 120 257 0 254 4 3 1 3 0 8 0 rtentry 112 191 0 115 4 0 4 4 0 8 0 unpcb 144 1240 0 1222 11 8 3 6 0 8 2 syncache 336 23 0 23 4 3 1 1 0 8 1 tcpqe 32 6 0 6 3 2 1 1 0 8 1 tcpcb 808 397 0 385 5 3 2 5 0 8 0 arp 120 30 0 19 1 0 1 1 0 8 0 inpcb 376 1666 0 1651 25 16 9 12 0 8 7 nd6 136 34 0 18 1 0 1 1 0 8 0 pkpcb 40 9 0 9 4 3 1 1 0 8 1 kcovpl 48 11 0 3 1 0 1 1 0 8 0 ppxss 1168 38 0 37 1 0 1 1 0 8 0 pppxif 1472 13 0 13 2 1 1 1 0 8 1 pffrag 232 10 0 1 1 0 1 1 0 482 0 pffrnode 88 9 0 1 1 0 1 1 0 8 0 pffrent 40 16 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 pfrktable 1344 5 0 1 1 0 1 1 0 8 0 pfanchor 1288 2 0 1 1 0 1 1 0 8 0 pftag 88 4 0 0 1 0 1 1 0 8 0 pfstitem 24 93 0 28 1 0 1 1 0 8 0 pfstkey 128 95 0 31 3 0 3 3 0 8 0 pfstate 376 93 0 29 7 0 7 7 0 8 0 pfrule 1344 28 0 18 2 0 2 2 0 8 0 art_heap8 4096 4 0 0 4 0 4 4 0 8 0 art_heap4 256 758 0 398 32 5 27 32 0 8 2 art_table 32 762 0 398 5 1 4 5 0 8 0 art_node 16 183 0 119 1 0 1 1 0 8 0 sysvmsgpl 40 3 0 2 1 0 1 1 0 8 0 semupl 112 65 0 65 1 1 0 1 0 8 0 semapl 112 92 0 82 1 0 1 1 0 8 0 shmpl 112 39 0 6 1 0 1 1 0 8 0 dirhash 1024 35 0 18 3 0 3 3 0 8 0 dino2pl 256 4383 0 2877 95 0 95 95 0 8 0 ffsino 280 4383 0 2877 109 0 109 109 0 8 0 nchpl 144 6504 0 4805 64 0 64 64 0 8 0 rtmask 32 7 0 7 2 2 0 1 0 8 0 uvmvnodes 80 5082 0 0 104 0 104 104 0 8 0 vnodes 216 5082 0 0 283 0 283 283 0 8 0 namei 1024 22252 0 22250 3 2 1 2 0 8 0 percpumem 16 106 0 60 1 0 1 1 0 8 0 pfiaddrpl 120 1 0 0 1 0 1 1 0 8 0 kstatmem 264 98 0 74 2 0 2 2 0 8 0 scsiplug 72 5 0 5 3 3 0 1 0 8 0 scxspl 216 20795 0 20794 12 9 3 8 1 8 2 plimitpl 152 279 0 259 1 0 1 1 0 8 0 sigapl 424 1835 0 1785 7 0 7 7 0 8 0 futexpl 64 21091 0 21084 1 0 1 1 0 8 0 knotepl 120 823 0 0 25 0 25 25 0 8 0 kqueuepl 216 564 0 554 6 4 2 3 0 8 1 pipepl 328 250 0 221 3 0 3 3 0 8 0 fdescpl 504 1813 0 1782 6 1 5 6 0 8 0 filepl 152 11961 0 11729 24 9 15 17 0 8 4 lockfpl 104 421 0 419 1 0 1 1 0 8 0 lockfspl 48 177 0 175 1 0 1 1 0 8 0 sessionpl 144 46 0 38 1 0 1 1 0 8 0 pgrppl 48 78 0 62 1 0 1 1 0 8 0 ucredpl 104 2375 0 2362 1 0 1 1 0 8 0 zombiepl 144 1786 0 1785 1 0 1 1 0 8 0 processpl 1176 1835 0 1785 5 0 5 5 0 8 0 procpl 656 4041 0 3980 7 0 7 7 0 8 1 srpgc 96 12 0 12 4 3 1 1 0 8 1 sosppl 168 9 0 9 3 3 0 1 0 8 0 sockpl 688 3314 0 3278 38 25 13 21 0 8 8 mcl64k 65536 6 0 0 1 0 1 1 0 8 0 mcl16k 16384 1 0 0 1 0 1 1 0 8 0 mcl12k 12288 1 0 0 1 0 1 1 0 8 0 mcl9k 9216 1 0 0 1 0 1 1 0 8 0 mcl8k 8192 5 0 0 1 0 1 1 0 8 0 mcl4k 4096 108 0 0 14 0 14 14 0 8 0 mcl2k 2048 20 0 0 3 0 3 3 0 8 0 mtagpl 96 61 0 0 2 0 2 2 0 8 0 mbufpl 256 212 0 0 13 0 13 13 0 8 0 bufpl 280 7262 0 1108 440 0 440 440 0 8 0 anonpl 24 260759 0 255665 85 28 57 72 0 184 17 amapchunkpl 152 51411 0 50832 43 14 29 29 0 158 3 amappl16 200 5472 0 5415 55 39 16 27 0 8 11 amappl15 192 5 0 4 1 0 1 1 0 8 0 amappl14 184 166 0 153 1 0 1 1 0 8 0 amappl13 176 10 0 9 1 0 1 1 0 8 0 amappl12 168 2546 0 2515 4 1 3 3 0 8 1 amappl11 160 53 0 39 1 0 1 1 0 8 0 amappl10 152 128 0 128 1 1 0 1 0 8 0 amappl9 144 249 0 249 1 1 0 1 0 8 0 amappl8 136 51 0 47 1 0 1 1 0 8 0 amappl7 128 157 0 144 1 0 1 1 0 8 0 amappl6 120 230 0 227 1 0 1 1 0 8 0 amappl5 112 140 0 130 1 0 1 1 0 8 0 amappl4 104 417 0 398 1 0 1 1 0 8 0 amappl3 96 10337 0 10223 5 1 4 4 0 8 0 amappl2 88 902 0 841 2 0 2 2 0 8 0 amappl1 80 17126 0 16554 17 3 14 17 0 8 0 amappl 88 15104 0 14924 5 0 5 5 0 92 0 dma65536 65536 1 0 1 1 1 0 1 0 8 0 dma16384 16384 1 0 1 1 1 0 1 0 8 0 dma8192 8192 1 0 1 1 1 0 1 0 8 0 dma4096 4096 1 0 1 1 1 0 1 0 8 0 dma1024 1024 2 0 1 1 0 1 1 0 8 0 dma256 256 7 0 7 2 2 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 41 0 6 1 0 1 1 0 8 0 uaddrrnd 24 1813 0 1782 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 1813 0 1782 1 0 1 1 0 8 0 vmmpekpl 168 17443 0 17392 3 0 3 3 0 8 0 vmmpepl 168 120348 0 118443 120 23 97 105 0 357 5 vmsppl 456 1812 0 1782 5 0 5 5 0 8 0 rwobjpl 64 39949 0 33860 103 2 101 101 0 8 2 pdppl 4096 3633 0 3564 133 60 73 87 0 8 4 pvpl 32 19377 0 0 158 1 157 157 0 265 0 pmappl 248 1812 0 1782 3 0 3 3 0 8 0 extentpl 40 55 0 38 1 0 1 1 0 8 0 phpool 112 326 0 80 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+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(ffff80003b0cdfe0,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(ffff80003b0ce140,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: 0x739a49022b40, 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(fffffd807b1d09a0,9,0) at witness_checkorder+0x1047 rw_do_enter_write(fffffd807b1d0988,1) at rw_do_enter_write+0xb7 sys/kern/kern_rwlock.c:233 rrw_enter(fffffd807b1d0988,1) at rrw_enter+0xc6 sys/kern/kern_rwlock.c:616 VOP_LOCK(fffffd805e0602c8,2001) at VOP_LOCK+0xa6 sys/kern/vfs_vops.c:524 vn_lock(fffffd805e0602c8,2001) at vn_lock+0xa4 sys/kern/vfs_vnops.c:570 vfs_lookup(ffff800034cb9df8) at vfs_lookup+0x109 sys/kern/vfs_lookup.c:418 namei(ffff800034cb9df8) at namei+0x7aa sys/kern/vfs_lookup.c:250 unp_connect(ffff800010fca608,fffffd805e7c0d00,ffff8000350a4030) at unp_connect+0x27d sys/kern/uipc_usrreq.c:868 uipc_dgram_send(ffff800010fca608,fffffd806be6d700,fffffd805e7c0d00,0) at uipc_dgram_send+0x131 sys/kern/uipc_usrreq.c:607 sosend(ffff800010fca608,fffffd805e7c0d00,ffff800034cba078,0,0,8) at sosend+0x804 sendit(ffff8000350a4030,3,ffff800034cba1f0,8,ffff800034cba2b0) at sendit+0x721 sys/kern/uipc_syscalls.c:779 sys_sendmsg(ffff8000350a4030,ffff800034cba360,ffff800034cba2b0) at sys_sendmsg+0x246 sys/kern/uipc_syscalls.c:597 syscall(ffff800034cba360) at syscall+0xbc6 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff800034cba360) at syscall+0xbc6 sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x412358c2810, count: -15