witness: lock order reversal: 1st 0xffff8000014a8200 sbufsnd (&so->so_snd.sb_lock) 2nd 0xfffffd800c0b5b50 inode (&ip->i_lock) lock order [1] sbufsnd (&so->so_snd.sb_lock) -> [2] inode (&ip->i_lock) lock order data 0xffffffff833f0cbb -> 0xffffffff833676f0 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:878 #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:765 #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+0x312 sys/kern/uipc_socket.c:1335 #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:765 #5 Xsyscall+0x128 Stopped at db_enter+0x25: addq $0x8,%rsp ddb{0}> ddb{0}> set $lines = 0 ddb{0}> set $maxwidth = 0 ddb{0}> show panic the kernel did not panic ddb{0}> trace db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 witness_checkorder(fffffd800c0b5b50,9,0) at witness_checkorder+0x10b9 sys/kern/subr_witness.c:-1 rw_do_enter_write(fffffd800c0b5b38,1) at rw_do_enter_write+0xba sys/kern/kern_rwlock.c:234 rrw_enter(fffffd800c0b5b38,1) at rrw_enter+0xc6 sys/kern/kern_rwlock.c:621 VOP_LOCK(fffffd806c129ea0,2001) at VOP_LOCK+0xa3 sys/kern/vfs_vops.c:527 vn_lock(fffffd806c129ea0,2001) at vn_lock+0xa4 sys/kern/vfs_vnops.c:570 vfs_lookup(ffff80003b00e6c0) at vfs_lookup+0x11c sys/kern/vfs_lookup.c:-1 namei(ffff80003b00e6c0) at namei+0x7ca sys/kern/vfs_lookup.c:250 unp_connect(ffff8000014a8018,fffffd807ed02300,ffff80002a28e2b0) at unp_connect+0x29d sys/kern/uipc_usrreq.c:872 uipc_dgram_send(ffff8000014a8018,fffffd8060217100,fffffd807ed02300,0) at uipc_dgram_send+0x163 sys/kern/uipc_usrreq.c:609 sosend(ffff8000014a8018,fffffd807ed02300,ffff80003b00e948,0,0,e) at sosend+0x804 sys/kern/uipc_socket.c:-1 sendit(ffff80002a28e2b0,6,ffff80003b00eac8,e,ffff80003b00eb80) at sendit+0x5a5 sys/kern/uipc_syscalls.c:785 sys_sendmsg(ffff80002a28e2b0,ffff80003b00ec30,ffff80003b00eb80) at sys_sendmsg+0x246 sys/kern/uipc_syscalls.c:603 syscall(ffff80003b00ec30) at syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003b00ec30) at syscall+0xbd4 sys/arch/amd64/amd64/trap.c:765 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xa9fc0ad480, count: -15 ddb{0}> show registers rdi 0 rsi 0x80000 acpi_pdirpa+0x6be71 rbp 0xffff80003b00e340 rbx 0 rdx 0xffff8000014fce40 rcx 0xffff80002a28e2b0 rax 0x7ffff acpi_pdirpa+0x6be70 r8 0xffff80003b00e220 r9 0x8080808080808080 r10 0x87fbd5ead7d00c5c r11 0x267dd77e3585c769 r12 0xfffffd8003f2c680 r13 0xfffffd8004714818 r14 0x3 r15 0xffffffff834049f1 substchar+0xa39c rip 0xffffffff81027c95 db_enter+0x25 cs 0x8 rflags 0x246 rsp 0xffff80003b00e330 ss 0x10 db_enter+0x25: addq $0x8,%rsp ddb{0}> show proc PROC (syz-executor) tid=376356 pid=15176 tcnt=2 stat=onproc flags process=10 proc=4000000 runpri=32, usrpri=81, slppri=32, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff800038bfe2c0,0xffff800038bff4f8 process=0xffff80003c4e6b78 user=0xffff80003b009000, vmspace=0xfffffd80605c45e0 estcpu=31, cpticks=0, pctcpu=0.0, user=0, sys=0, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND 90946 334998 18890 0 2 0 syz-executor 90946 215218 18890 0 3 0x4000080 fsleep syz-executor 90946 28600 18890 0 2 0x4000000 syz-executor 49275 264604 91949 0 2 0 syz-executor 49275 439060 91949 0 2 0x4000000 syz-executor 15176 275555 5699 60929 2 0x10 syz-executor *15176 376356 5699 60929 7 0x4000010 syz-executor 42789 3041 94898 0 2 0x10 syz-executor 42789 337484 94898 0 3 0x4000090 bell syz-executor 42789 108215 94898 0 3 0x4000090 rest syz-executor 52633 172254 0 0 3 0x14280 nfsidl nfsio 33548 192525 0 0 3 0x14280 nfsidl nfsio 84675 355977 0 0 3 0x14280 nfsidl nfsio 69739 293283 0 0 3 0x14280 nfsidl nfsio 49681 328597 0 0 3 0x14280 nfsidl nfsio 82789 253936 0 0 3 0x14280 nfsidl nfsio 30247 194923 0 0 3 0x14280 nfsidl nfsio 76177 127051 0 0 3 0x14280 nfsidl nfsio 74812 120371 0 0 3 0x14280 nfsidl nfsio 13959 253179 0 0 3 0x14280 nfsidl nfsio 77502 428437 0 0 3 0x14280 nfsidl nfsio 81511 357121 0 0 3 0x14280 nfsidl nfsio 28152 511365 0 0 3 0x14280 nfsidl nfsio 34320 203736 0 0 3 0x14280 nfsidl nfsio 45540 520291 0 0 3 0x14280 nfsidl nfsio 21599 434533 0 0 3 0x14280 nfsidl nfsio 34190 3156 0 0 3 0x14280 nfsidl nfsio 89542 30180 0 0 3 0x14280 nfsidl nfsio 12811 133379 0 0 3 0x14280 nfsidl nfsio 28285 31365 0 0 3 0x14280 nfsidl nfsio 5699 513732 43992 0 3 0x82 nanoslp syz-executor 68190 507083 0 0 3 0x14200 acct acct 18890 234122 43992 0 3 0x82 nanoslp syz-executor 66580 483454 43992 0 3 0x2 biowait syz-executor 88784 428412 43992 0 3 0x82 wait syz-executor 98675 19949 43992 0 7 0x3 syz-executor 91949 150900 43992 0 3 0x82 nanoslp syz-executor 38933 66882 43992 0 3 0x82 wait syz-executor 94898 481286 43992 0 3 0x82 nanoslp syz-executor 43992 424551 32275 0 3 0x82 kqread syz-executor 32275 172510 85234 0 3 0x10008a sigsusp ksh 85234 77664 22799 0 3 0x98 kqread sshd-session 22799 280030 23963 0 3 0x92 kqread sshd-session 95524 337419 1 0 3 0x100083 ttyopn getty 23963 417712 1 0 3 0x88 kqread sshd 23880 283205 7512 74 3 0x1100092 bpf pflogd 7512 199925 1 0 3 0x80 sbwait pflogd 78189 492693 37096 73 3 0x1100090 kqread syslogd 37096 393011 1 0 3 0x100082 sbwait syslogd 14115 132990 1 0 3 0x100080 kqread resolvd 79197 3266 32388 77 3 0x100092 kqread dhcpleased 59958 423368 32388 77 3 0x100092 kqread dhcpleased 32388 48013 1 0 3 0x80 kqread dhcpleased 8574 214088 0 0 3 0x14200 bored smr 60890 344214 0 0 2 0x14200 zerothread 818 69006 0 0 3 0x14200 aiodoned aiodoned 94116 249439 0 0 3 0x14200 syncer update 39762 47400 0 0 3 0x14200 cleaner cleaner 57246 298012 0 0 3 0x14200 reaper reaper 99829 521547 0 0 3 0x14200 pgdaemon pagedaemon 47170 222014 0 0 3 0x14200 bored viomb 74496 201933 0 0 3 0x40014200 acpi0 acpi0 43272 519169 0 0 3 0x40014200 idle1 10825 1677 0 0 3 0x14200 bored softnet1 16104 298428 0 0 3 0x14200 bored softnet0 10248 437075 0 0 3 0x14200 bored systqmp 96538 298316 0 0 3 0x14200 bored systq 36852 365603 0 0 3 0x14200 tmoslp softclockmp 93003 129651 0 0 3 0x40014200 tmoslp softclock 62249 122696 0 0 3 0x40014200 idle0 1 152831 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{0}> show all locks Process 15176 (syz-executor) thread 0xffff80002a28e2b0 (376356) exclusive kernel_lock &kernel_lock r = 0 (0xffffffff8389d228) #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:765 #7 Xsyscall+0x128 exclusive rwlock sbufsnd r = 0 (0xffff8000014a8200) #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:639 #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:765 #7 Xsyscall+0x128 Process 66580 (syz-executor) thread 0xffff80002a28ea78 (483454) exclusive rrwlock inode r = 0 (0xfffffd800c0b57d8) #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:687 #6 ufs_ihashget+0x185 sys/ufs/ufs/ufs_ihash.c:98 #7 ffs_vget+0x8c sys/ufs/ffs/ffs_vfsops.c:1203 #8 ufs_lookup+0x1a36 sys/ufs/ufs/ufs_lookup.c:478 #9 VOP_LOOKUP+0x6e sys/kern/vfs_vops.c:85 #10 vfs_lookup+0x93a sys/kern/vfs_lookup.c:566 #11 namei+0x7ca sys/kern/vfs_lookup.c:250 #12 dounlinkat+0xc1 sys/kern/vfs_syscalls.c:1868 #13 syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] #13 syscall+0xb17 sys/arch/amd64/amd64/trap.c:765 #14 Xsyscall+0x128 exclusive rrwlock inode r = 0 (0xfffffd806c822578) #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 vfs_lookup+0x11c sys/kern/vfs_lookup.c:-1 #6 namei+0x7ca sys/kern/vfs_lookup.c:250 #7 dounlinkat+0xc1 sys/kern/vfs_syscalls.c:1868 #8 syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] #8 syscall+0xb17 sys/arch/amd64/amd64/trap.c:765 #9 Xsyscall+0x128 ddb{0}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10200 11031K 11388K 166960K 11862 0 pcb 17 12K 13K 166960K 97 0 rtable 229 9K 9K 166960K 432 0 pf 39 18K 81K 166960K 94 0 ifaddr 42 7K 7K 166960K 71 0 ifgroup 55 2K 2K 166960K 102 0 sysctl 3 1K 9K 166960K 9 0 counters 68 36K 37K 166960K 180 0 ioctlops 0 0K 4K 166960K 1561 0 iov 0 0K 12K 166960K 25 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1405 88K 89K 166960K 1737 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 9K 166960K 6 0 VM map 2 1K 1K 166960K 2 0 sem 10 0K 0K 166960K 13 0 dirhash 12 2K 2K 166960K 18 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 16 57K 232K 166960K 468 0 sigio 1 0K 0K 166960K 5 0 proc 72 115K 196K 166960K 591 0 subproc 72 4K 4K 166960K 81 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 60 0 in_multi 98 7K 7K 166960K 133 0 ether_multi 1 0K 0K 166960K 8 0 mrt 2 0K 0K 166960K 6 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 430 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 232 167K 187K 166960K 5827 0 UVM aobj 14 4K 4K 166960K 15 0 pinsyscall 41 82K 106K 166960K 1605 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 17 0 NDP 12 0K 2K 166960K 48 0 temp 49 8652K 8717K 166960K 19518 0 kqueue 14 22K 28K 166960K 90 0 SYN cache 2 16K 16K 166960K 2 0 ddb{0}> 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 59 0 55 1 0 1 1 0 8 0 rtentry 176 129 0 31 5 0 5 5 0 8 0 unpcb 144 204 0 184 1 0 1 1 0 8 0 syncache 336 3 0 3 1 1 0 1 0 8 0 tcpcb 736 74 0 70 1 0 1 1 0 8 0 arp 136 20 0 2 1 0 1 1 0 8 0 inpcb 328 325 0 317 3 0 3 3 0 8 1 nd6 152 28 0 3 1 0 1 1 0 8 0 pkpcb 40 3 0 2 1 0 1 1 0 8 0 kcovpl 48 9 0 1 1 0 1 1 0 8 0 ppxss 1192 51 0 51 1 0 1 1 0 8 1 pppxif 1504 2 0 2 1 0 1 1 0 8 1 pfstscr 40 2 0 1 1 0 1 1 0 8 0 pffrag 232 6 0 3 1 0 1 1 0 482 0 pffrnode 88 6 0 3 1 0 1 1 0 8 0 pffrent 40 11 0 8 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 3 0 1 1 0 1 1 0 8 0 pfanchor 1288 1 0 0 1 0 1 1 0 8 0 pfstitem 24 42 0 1 1 0 1 1 0 8 0 pfstkey 128 44 0 3 2 0 2 2 0 8 0 pfstate 384 42 0 2 4 0 4 4 0 8 0 pfrule 1344 24 0 18 2 1 1 2 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 569 0 127 30 1 29 30 0 8 1 art_table 40 570 0 127 5 0 5 5 0 8 0 art_node 32 129 0 41 1 0 1 1 0 8 0 sysvmsgpl 40 9 0 6 1 0 1 1 0 8 0 semapl 112 11 0 3 1 0 1 1 0 8 0 shmpl 112 12 0 1 1 0 1 1 0 8 0 dirhash 1024 21 0 4 3 0 3 3 0 8 0 dino2pl 256 2242 0 729 96 0 96 96 0 8 0 ffsino 296 2242 0 729 118 0 118 118 0 8 0 nchpl 144 2890 0 1191 64 0 64 64 0 8 0 rtmask 32 2 0 2 1 1 0 1 0 8 0 vnodes 216 2518 0 0 140 0 140 140 0 8 0 namei 1024 9296 0 9295 2 1 1 2 0 8 0 percpumem 16 105 0 56 1 0 1 1 0 8 0 pfiaddrpl 120 1 0 0 1 0 1 1 0 8 0 kstatmem 264 60 0 34 3 0 3 3 0 8 1 scsiplug 72 3 0 3 1 0 1 1 0 8 1 scxspl 216 12097 0 12096 6 4 2 4 1 8 1 plimitpl 152 90 0 73 1 0 1 1 0 8 0 sigapl 424 782 0 715 9 1 8 8 0 8 0 knotepl 120 534 0 0 17 0 17 17 0 8 0 kqueuepl 224 130 0 120 1 0 1 1 0 8 0 pipepl 344 151 0 124 3 0 3 3 0 8 0 fdescpl 528 745 0 715 3 0 3 3 0 8 0 filepl 160 3831 0 3603 13 0 13 13 0 8 2 lockfpl 104 264 0 262 2 0 2 2 0 8 1 lockfspl 48 123 0 121 1 0 1 1 0 8 0 sessionpl 144 23 0 14 1 0 1 1 0 8 0 pgrppl 48 38 0 21 1 0 1 1 0 8 0 ucredpl 104 696 0 681 1 0 1 1 0 8 0 zombiepl 144 717 0 715 1 0 1 1 0 8 0 processpl 1232 782 0 715 6 0 6 6 0 8 0 procpl 664 1315 0 1242 8 0 8 8 0 8 1 sosppl 176 4 0 4 1 0 1 1 0 8 1 sockpl 752 599 0 566 7 0 7 7 0 8 3 mcl64k 65536 2 0 0 1 0 1 1 0 8 0 mcl8k 8192 2 0 0 1 0 1 1 0 8 0 mcl4k 4096 111 0 0 14 0 14 14 0 8 0 mcl2k 2048 31 0 0 4 0 4 4 0 8 0 mtagpl 96 1 0 0 1 0 1 1 0 8 0 mbufpl 256 193 0 0 13 0 13 13 0 8 0 bufpl 280 4736 0 134 329 0 329 329 0 8 0 anonpl 32 9549 0 0 77 0 77 77 0 246 0 amapchunkpl 152 19173 0 18731 36 4 32 36 0 158 12 amappl16 200 2985 0 2955 21 6 15 16 0 8 8 amappl15 192 6 0 6 1 1 0 1 0 8 0 amappl14 184 2 0 2 1 1 0 1 0 8 0 amappl13 176 438 0 437 1 0 1 1 0 8 0 amappl12 168 1105 0 1064 3 0 3 3 0 8 0 amappl11 160 6 0 6 1 1 0 1 0 8 0 amappl10 152 49 0 35 1 0 1 1 0 8 0 amappl9 144 254 0 254 1 1 0 1 0 8 0 amappl8 136 43 0 40 1 0 1 1 0 8 0 amappl7 128 87 0 86 1 0 1 1 0 8 0 amappl6 120 295 0 282 1 0 1 1 0 8 0 amappl5 112 86 0 76 1 0 1 1 0 8 0 amappl4 104 424 0 393 1 0 1 1 0 8 0 amappl3 96 3079 0 2996 4 1 3 3 0 8 0 amappl2 88 847 0 773 2 0 2 2 0 8 0 amappl1 80 10370 0 9794 14 1 13 14 0 8 0 amappl 88 5027 0 4874 5 0 5 5 0 92 0 uvmvnodes 80 2518 0 0 52 0 52 52 0 8 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 14 0 1 1 0 1 1 0 8 0 uaddrrnd 24 745 0 715 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 745 0 715 1 0 1 1 0 8 0 vmmpekpl 168 7686 0 7645 2 0 2 2 0 8 0 vmmpepl 168 54387 0 52547 97 0 97 97 0 357 4 vmsppl 488 744 0 715 6 1 5 5 0 8 0 rwobjpl 80 20123 0 16698 77 1 76 76 0 8 0 pdppl 4096 1498 0 1430 102 30 72 86 0 8 4 pvpl 32 17941 0 0 146 1 145 145 0 265 0 pmappl 256 744 0 715 3 0 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 275 0 35 8 0 8 8 0 8 0 ddb{0}> machine ddbcpu 0 Invalid cpu 0 ddb{0}> trace db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 witness_checkorder(fffffd800c0b5b50,9,0) at witness_checkorder+0x10b9 sys/kern/subr_witness.c:-1 rw_do_enter_write(fffffd800c0b5b38,1) at rw_do_enter_write+0xba sys/kern/kern_rwlock.c:234 rrw_enter(fffffd800c0b5b38,1) at rrw_enter+0xc6 sys/kern/kern_rwlock.c:621 VOP_LOCK(fffffd806c129ea0,2001) at VOP_LOCK+0xa3 sys/kern/vfs_vops.c:527 vn_lock(fffffd806c129ea0,2001) at vn_lock+0xa4 sys/kern/vfs_vnops.c:570 vfs_lookup(ffff80003b00e6c0) at vfs_lookup+0x11c sys/kern/vfs_lookup.c:-1 namei(ffff80003b00e6c0) at namei+0x7ca sys/kern/vfs_lookup.c:250 unp_connect(ffff8000014a8018,fffffd807ed02300,ffff80002a28e2b0) at unp_connect+0x29d sys/kern/uipc_usrreq.c:872 uipc_dgram_send(ffff8000014a8018,fffffd8060217100,fffffd807ed02300,0) at uipc_dgram_send+0x163 sys/kern/uipc_usrreq.c:609 sosend(ffff8000014a8018,fffffd807ed02300,ffff80003b00e948,0,0,e) at sosend+0x804 sys/kern/uipc_socket.c:-1 sendit(ffff80002a28e2b0,6,ffff80003b00eac8,e,ffff80003b00eb80) at sendit+0x5a5 sys/kern/uipc_syscalls.c:785 sys_sendmsg(ffff80002a28e2b0,ffff80003b00ec30,ffff80003b00eb80) at sys_sendmsg+0x246 sys/kern/uipc_syscalls.c:603 syscall(ffff80003b00ec30) at syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003b00ec30) at syscall+0xbd4 sys/arch/amd64/amd64/trap.c:765 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xa9fc0ad480, count: -15 ddb{0}> machine ddbcpu 1 Stopped at x86_ipi_db+0x27: addq $0x8,%rsp ddb{1}> trace x86_ipi_db(ffff8000299edff0) 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(ffffffff8389d020) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:134 [inline] __mp_lock(ffffffff8389d020) at __mp_lock+0x192 sys/kern/kern_lock.c:165 ktrsyscall(ffff80002a28f4d8,6,8,ffff80002a378bf0) at ktrsyscall+0x2c7 ktrwrite sys/kern/kern_ktrace.c:-1 [inline] ktrsyscall(ffff80002a28f4d8,6,8,ffff80002a378bf0) at ktrsyscall+0x2c7 sys/kern/kern_ktrace.c:183 syscall(ffff80002a378bf0) at syscall+0x304 mi_syscall sys/sys/syscall_mi.h:154 [inline] syscall(ffff80002a378bf0) at syscall+0x304 sys/arch/amd64/amd64/trap.c:765 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x74bea6fca2a0, count: -7