witness: lock order reversal: 1st 0xffff8000014e19f8 sbufsnd (&so->so_snd.sb_lock) 2nd 0xfffffd806ffe47e0 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{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(fffffd806ffe47e0,9,0) at witness_checkorder+0x10b9 sys/kern/subr_witness.c:-1 rw_do_enter_write(fffffd806ffe47c8,1) at rw_do_enter_write+0xba sys/kern/kern_rwlock.c:234 rrw_enter(fffffd806ffe47c8,1) at rrw_enter+0xc6 sys/kern/kern_rwlock.c:621 VOP_LOCK(fffffd806fceab50,2001) at VOP_LOCK+0xa3 sys/kern/vfs_vops.c:527 vn_lock(fffffd806fceab50,2001) at vn_lock+0xa4 sys/kern/vfs_vnops.c:570 vfs_lookup(ffff800035fe6c90) at vfs_lookup+0x11c sys/kern/vfs_lookup.c:-1 namei(ffff800035fe6c90) at namei+0x7ca sys/kern/vfs_lookup.c:250 unp_connect(ffff8000014e1810,fffffd8077aab600,ffff8000fffeea78) at unp_connect+0x29d sys/kern/uipc_usrreq.c:872 uipc_dgram_send(ffff8000014e1810,fffffd805f996900,fffffd8077aab600,0) at uipc_dgram_send+0x163 sys/kern/uipc_usrreq.c:609 sosend(ffff8000014e1810,fffffd8077aab600,ffff800035fe6f18,0,0,e) at sosend+0x804 sys/kern/uipc_socket.c:-1 sendit(ffff8000fffeea78,7,ffff800035fe7098,e,ffff800035fe7150) at sendit+0x5a5 sys/kern/uipc_syscalls.c:785 sys_sendmsg(ffff8000fffeea78,ffff800035fe7200,ffff800035fe7150) at sys_sendmsg+0x246 sys/kern/uipc_syscalls.c:603 syscall(ffff800035fe7200) at syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff800035fe7200) at syscall+0xbd4 sys/arch/amd64/amd64/trap.c:765 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xa3519dff5b0, count: -15 ddb{1}> show registers rdi 0 rsi 0x80000 acpi_pdirpa+0x6be71 rbp 0xffff800035fe6910 rbx 0 rdx 0xffff800001449140 rcx 0xffff8000fffeea78 rax 0x7ffff acpi_pdirpa+0x6be70 r8 0xffff800035fe67f0 r9 0x8080808080808080 r10 0xe01493052e4942b6 r11 0x68632a0fdc6091b r12 0xfffffd8003f2c680 r13 0xfffffd8004713cf0 r14 0x3 r15 0xffffffff834049f1 substchar+0xa39c rip 0xffffffff81027c95 db_enter+0x25 cs 0x8 rflags 0x246 rsp 0xffff800035fe6900 ss 0x10 db_enter+0x25: addq $0x8,%rsp ddb{1}> show proc PROC (syz-executor) tid=106654 pid=54873 tcnt=3 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=0xffff8000fffee548,0xffffffff839ef390 process=0xffff80003c424e90 user=0xffff800035fe2000, vmspace=0xfffffd800eedc208 estcpu=36, cpticks=1, pctcpu=0.0, user=0, sys=1, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 8230 387555 44014 0 3 0x80 nanoslp syz-executor 8230 310491 44014 0 3 0x4000080 ttyout syz-executor 8230 117567 44014 0 3 0x4000080 fsleep syz-executor 54873 395165 19420 0 2 0 syz-executor 54873 344965 19420 0 3 0x4000080 kqsel syz-executor *54873 106654 19420 0 7 0x4000000 syz-executor 37502 148471 31506 60929 3 0x90 nanoslp syz-executor 37502 198627 31506 60929 3 0x4000090 msgwait syz-executor 37502 355474 31506 60929 3 0x4000090 fsleep syz-executor 51620 65095 9493 0 3 0x3000 suspend syz-executor 51620 24040 9493 0 3 0x4081000 biowait syz-executor 51620 417053 9493 0 3 0x4081000 inode syz-executor 51620 235144 9493 0 3 0x4081000 inode syz-executor 26674 460768 3118 0 3 0x80 nanoslp syz-executor 26674 332332 3118 0 3 0x4000080 sbwait syz-executor 26674 275943 3118 0 3 0x4000080 fsleep syz-executor 8031 10773 10676 0 3 0x80 nanoslp syz-executor 8031 456030 10676 0 3 0x4000080 sbwait syz-executor 8031 182395 10676 0 3 0x4000080 fsleep syz-executor 65839 472235 0 0 3 0x14200 acct acct 3118 305272 10697 0 3 0x82 nanoslp syz-executor 10676 245608 10697 0 3 0x82 nanoslp syz-executor 44014 480271 10697 0 3 0x82 nanoslp syz-executor 20143 329238 10697 0 3 0x82 nanoslp syz-executor 19420 135927 10697 0 3 0x82 nanoslp syz-executor 56921 218032 10697 0 3 0x82 nanoslp syz-executor 31506 395817 10697 0 3 0x82 nanoslp syz-executor 9493 416019 10697 0 3 0x82 nanoslp syz-executor 10697 55272 86068 0 3 0x82 kqread syz-executor 86068 14500 30944 0 3 0x10008a sigsusp ksh 30944 414609 81712 0 3 0x98 kqread sshd-session 81712 165344 46571 0 3 0x92 kqread sshd-session 51417 197707 1 0 3 0x100083 ttyin getty 46571 471550 1 0 3 0x88 kqread sshd 15382 188351 85282 74 3 0x1100092 bpf pflogd 85282 100849 1 0 3 0x80 sbwait pflogd 13728 402137 26680 73 3 0x1100090 kqread syslogd 26680 294425 1 0 3 0x100082 sbwait syslogd 10846 68829 1 0 3 0x100080 kqread resolvd 4227 38506 77697 77 3 0x100092 kqread dhcpleased 44926 167281 77697 77 3 0x100092 kqread dhcpleased 77697 316045 1 0 3 0x80 kqread dhcpleased 81844 234579 0 0 3 0x14200 bored smr 47400 216875 0 0 3 0x14200 pgzero zerothread 11320 57157 0 0 3 0x14200 aiodoned aiodoned 74755 79260 0 0 3 0x14200 syncer update 84681 117349 0 0 3 0x14200 cleaner cleaner 50995 25836 0 0 3 0x14200 reaper reaper 3167 83450 0 0 3 0x14200 pgdaemon pagedaemon 71412 419177 0 0 3 0x14200 bored viomb 99925 475611 0 0 3 0x40014200 acpi0 acpi0 61162 399530 0 0 3 0x40014200 idle1 13726 268850 0 0 3 0x14200 bored softnet1 48414 371790 0 0 2 0x14200 softnet0 35213 79048 0 0 3 0x14200 bored systqmp 78942 448917 0 0 3 0x14200 bored systq 9292 146875 0 0 3 0x14200 tmoslp softclockmp 48156 84018 0 0 3 0x40014200 tmoslp softclock 75440 274362 0 0 3 0x40014200 idle0 1 215726 0 0 3 0x82 wait init 0 0 -1 0 3 0x10010200 scheduler swapper ddb{1}> show all locks Process 54873 (syz-executor) thread 0xffff8000fffeea78 (106654) 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 (0xffff8000014e19f8) #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 51620 (syz-executor) thread 0xffff80003c4522c0 (24040) exclusive rrwlock inode r = 0 (0xfffffd806ffe4da8) #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 vn_write+0x18f sys/kern/vfs_vnops.c:405 #6 dofilewritev+0x242 sys/kern/sys_generic.c:380 #7 sys_write+0xa2 sys/kern/sys_generic.c:300 #8 syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline] #8 syscall+0xbd4 sys/arch/amd64/amd64/trap.c:765 #9 Xsyscall+0x128 Process 51620 (syz-executor) thread 0xffff80003b0022b8 (417053) exclusive rrwlock inode r = 0 (0xfffffd806ffe4218) #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 vn_open+0x15a sys/kern/vfs_vnops.c:140 #8 doopenat+0x35b sys/kern/vfs_syscalls.c:1138 #9 syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline] #9 syscall+0xbd4 sys/arch/amd64/amd64/trap.c:765 #10 Xsyscall+0x128 ddb{1}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10221 11031K 11366K 166960K 11973 0 pcb 18 12K 12K 166960K 85 0 rtable 243 9K 10K 166960K 482 0 pf 37 18K 82K 166960K 91 0 ifaddr 45 8K 8K 166960K 71 0 ifgroup 55 2K 2K 166960K 105 0 sysctl 3 1K 9K 166960K 8 0 counters 68 36K 38K 166960K 126 0 ioctlops 0 0K 4K 166960K 1611 0 iov 2 18K 32K 166960K 25 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1407 89K 89K 166960K 1734 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 2K 10K 166960K 10 0 VM map 2 1K 1K 166960K 2 0 sem 11 0K 0K 166960K 17 0 dirhash 12 2K 2K 166960K 21 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 17 61K 240K 166960K 502 0 sigio 0 0K 0K 166960K 5 0 proc 72 115K 164K 166960K 575 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 57 0 in_multi 99 7K 7K 166960K 127 0 ether_multi 1 0K 0K 166960K 7 0 mrt 2 0K 0K 166960K 11 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 217 970K 970K 166960K 217 0 exec 0 0K 1K 166960K 431 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 257 157K 166K 166960K 6479 0 UVM aobj 6 4K 4K 166960K 7 0 pinsyscall 42 84K 104K 166960K 1694 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 26 0 NDP 12 0K 2K 166960K 48 0 temp 49 8653K 8725K 166960K 26344 0 kqueue 15 24K 30K 166960K 97 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 26 0 0 1 0 1 1 0 8 0 rtpcb 120 64 0 61 1 0 1 1 0 8 0 rtentry 176 133 0 29 6 0 6 6 0 8 0 unpcb 144 724 0 700 9 0 9 9 0 8 7 syncache 336 7 0 7 1 0 1 1 0 8 1 tcpqe 32 1 0 1 1 1 0 1 0 8 0 tcpcb 736 202 0 196 7 4 3 7 0 8 2 arp 136 21 0 2 1 0 1 1 0 8 0 inpcb 328 508 0 495 8 3 5 7 0 8 2 nd6 152 29 0 3 1 0 1 1 0 8 0 pkpcb 40 5 0 5 1 0 1 1 0 8 1 kcovpl 48 9 0 1 1 0 1 1 0 8 0 ppxss 1192 24 0 24 1 0 1 1 0 8 1 pfstscr 40 2 0 2 1 0 1 1 0 8 1 pffrag 232 5 0 0 1 0 1 1 0 482 0 pffrnode 88 5 0 0 1 0 1 1 0 8 0 pffrent 40 14 0 9 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 23 0 1 1 0 1 1 0 8 0 pfstkey 128 24 0 2 1 0 1 1 0 8 0 pfstate 384 24 0 2 3 0 3 3 0 8 0 pfrule 1344 26 0 18 2 1 1 2 0 8 0 rttmr 136 3 0 3 1 0 1 1 0 8 1 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 636 0 184 31 0 31 31 0 8 2 art_table 40 637 0 184 5 0 5 5 0 8 0 art_node 32 132 0 40 1 0 1 1 0 8 0 sysvmsgpl 40 4 0 3 2 1 1 1 0 8 0 semapl 112 14 0 5 1 0 1 1 0 8 0 shmpl 112 4 0 1 1 0 1 1 0 8 0 dirhash 1024 23 0 6 3 0 3 3 0 8 0 dino2pl 256 2255 0 740 96 0 96 96 0 8 0 ffsino 296 2255 0 740 119 1 118 118 0 8 0 nchpl 144 2877 0 1172 64 0 64 64 0 8 0 rtmask 32 9 0 9 2 1 1 1 0 8 1 vnodes 216 2556 0 0 142 0 142 142 0 8 0 namei 1024 9762 0 9759 2 0 2 2 0 8 1 percpumem 16 78 0 29 1 0 1 1 0 8 0 kstatmem 264 62 0 36 3 0 3 3 0 8 1 scsiplug 72 1 0 1 1 0 1 1 0 8 1 scxspl 216 12843 0 12842 8 2 6 6 1 8 5 plimitpl 152 154 0 135 1 0 1 1 0 8 0 sigapl 424 812 0 763 7 1 6 7 0 8 0 knotepl 120 309 0 0 10 0 10 10 0 8 0 kqueuepl 224 188 0 176 3 0 3 3 0 8 2 pipepl 344 147 0 120 3 0 3 3 0 8 0 fdescpl 528 794 0 763 3 0 3 3 0 8 0 filepl 160 4525 0 4293 18 0 18 18 0 8 4 lockfpl 104 501 0 499 3 1 2 2 0 8 1 lockfspl 48 111 0 109 1 0 1 1 0 8 0 sessionpl 144 26 0 17 1 0 1 1 0 8 0 pgrppl 48 39 0 22 1 0 1 1 0 8 0 ucredpl 104 548 0 534 1 0 1 1 0 8 0 zombiepl 144 766 0 763 1 0 1 1 0 8 0 processpl 1232 812 0 763 5 0 5 5 0 8 0 procpl 664 1426 0 1364 6 0 6 6 0 8 0 sockpl 752 1311 0 1271 24 12 12 24 0 8 6 mcl64k 65536 17 0 0 3 0 3 3 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 mcl8k 8192 2 0 0 1 0 1 1 0 8 0 mcl4k 4096 123 0 0 16 0 16 16 0 8 0 mcl2k 2048 22 0 0 3 0 3 3 0 8 0 mtagpl 96 4 0 0 1 0 1 1 0 8 0 mbufpl 256 193 0 0 13 0 13 13 0 8 0 bufpl 280 4737 0 166 327 0 327 327 0 8 0 anonpl 32 9659 0 0 79 1 78 78 0 246 0 amapchunkpl 152 20709 0 19980 34 1 33 34 0 158 4 amappl16 200 2633 0 2548 15 2 13 14 0 8 8 amappl15 192 7 0 7 1 1 0 1 0 8 0 amappl14 184 1 0 1 1 1 0 1 0 8 0 amappl13 176 470 0 469 1 0 1 1 0 8 0 amappl12 168 1212 0 1169 3 0 3 3 0 8 0 amappl11 160 4 0 4 2 1 1 1 0 8 1 amappl10 152 64 0 50 1 0 1 1 0 8 0 amappl9 144 249 0 249 1 1 0 1 0 8 0 amappl8 136 42 0 39 1 0 1 1 0 8 0 amappl7 128 94 0 92 1 0 1 1 0 8 0 amappl6 120 308 0 295 1 0 1 1 0 8 0 amappl5 112 87 0 76 1 0 1 1 0 8 0 amappl4 104 452 0 422 1 0 1 1 0 8 0 amappl3 96 3429 0 3329 4 1 3 3 0 8 0 amappl2 88 935 0 858 2 0 2 2 0 8 0 amappl1 80 11482 0 10884 14 0 14 14 0 8 0 amappl 88 5619 0 5437 5 0 5 5 0 92 0 uvmvnodes 80 2556 0 0 53 0 53 53 0 8 0 dma65536 65536 1 0 1 1 1 0 1 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 6 0 1 1 0 1 1 0 8 0 uaddrrnd 24 794 0 762 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 794 0 762 1 0 1 1 0 8 0 vmmpekpl 168 8407 0 8369 3 0 3 3 0 8 1 vmmpepl 168 58780 0 56732 98 0 98 98 0 357 6 vmsppl 488 793 0 762 5 0 5 5 0 8 0 rwobjpl 80 21435 0 17872 73 0 73 73 0 8 0 pdppl 4096 1596 0 1524 108 34 74 86 0 8 2 pvpl 32 16887 0 0 138 1 137 137 0 265 0 pmappl 256 793 0 762 3 0 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 293 0 41 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(ffffffff83877ff0) 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 intr_handler(ffff800030bd5670,ffff80000006ac00) at intr_handler+0xe9 sys/arch/amd64/amd64/intr.c:559 Xintr_ioapic_edge16_untramp() at Xintr_ioapic_edge16_untramp+0x18f __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x2c kd_curproc sys/dev/kcov.c:584 [inline] __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x2c sys/dev/kcov.c:153 __mp_lock(ffffffff8389d020) at __mp_lock+0x1a3 __mp_lock_spin sys/kern/kern_lock.c:134 [inline] __mp_lock(ffffffff8389d020) at __mp_lock+0x1a3 sys/kern/kern_lock.c:165 intr_handler(ffff800030bd57e0,ffff80000007aa80) at intr_handler+0xe9 sys/arch/amd64/amd64/intr.c:559 Xintr_ioapic_edge23_untramp() at Xintr_ioapic_edge23_untramp+0x18f Xspllower() at Xspllower+0x1d pmap_do_remove(fffffd806c009b00,f8c0d33a000,f8c0d346000,0) at pmap_do_remove+0x89f sys/arch/amd64/amd64/pmap.c:1939 uvm_unmap_kill_entry_withlock(fffffd800eedc020,fffffd805fea68d0,0) at uvm_unmap_kill_entry_withlock+0x269 sys/uvm/uvm_map.c:1863 uvm_map_teardown(fffffd800eedc020) at uvm_map_teardown+0x117 uvm_map_addr_RBT_LEFT sys/uvm/uvm_map.h:-1 [inline] uvm_map_teardown(fffffd800eedc020) at uvm_map_teardown+0x117 sys/uvm/uvm_map.c:2486 exit1(ffff80003b002a80,0,0,1) at exit1+0x6fc sys/kern/kern_exit.c:260 sys_exit(ffff80003b002a80,ffff800030bd5c10,ffff800030bd5b60) at sys_exit+0x1a sys/kern/kern_exit.c:-1 syscall(ffff800030bd5c10) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff800030bd5c10) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:765 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7184d76dada0, count: -18 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(fffffd806ffe47e0,9,0) at witness_checkorder+0x10b9 sys/kern/subr_witness.c:-1 rw_do_enter_write(fffffd806ffe47c8,1) at rw_do_enter_write+0xba sys/kern/kern_rwlock.c:234 rrw_enter(fffffd806ffe47c8,1) at rrw_enter+0xc6 sys/kern/kern_rwlock.c:621 VOP_LOCK(fffffd806fceab50,2001) at VOP_LOCK+0xa3 sys/kern/vfs_vops.c:527 vn_lock(fffffd806fceab50,2001) at vn_lock+0xa4 sys/kern/vfs_vnops.c:570 vfs_lookup(ffff800035fe6c90) at vfs_lookup+0x11c sys/kern/vfs_lookup.c:-1 namei(ffff800035fe6c90) at namei+0x7ca sys/kern/vfs_lookup.c:250 unp_connect(ffff8000014e1810,fffffd8077aab600,ffff8000fffeea78) at unp_connect+0x29d sys/kern/uipc_usrreq.c:872 uipc_dgram_send(ffff8000014e1810,fffffd805f996900,fffffd8077aab600,0) at uipc_dgram_send+0x163 sys/kern/uipc_usrreq.c:609 sosend(ffff8000014e1810,fffffd8077aab600,ffff800035fe6f18,0,0,e) at sosend+0x804 sys/kern/uipc_socket.c:-1 sendit(ffff8000fffeea78,7,ffff800035fe7098,e,ffff800035fe7150) at sendit+0x5a5 sys/kern/uipc_syscalls.c:785 sys_sendmsg(ffff8000fffeea78,ffff800035fe7200,ffff800035fe7150) at sys_sendmsg+0x246 sys/kern/uipc_syscalls.c:603 syscall(ffff800035fe7200) at syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff800035fe7200) at syscall+0xbd4 sys/arch/amd64/amd64/trap.c:765 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xa3519dff5b0, count: -15