login: witness: lock order reversal: 1st 0xffff80000151e8c8 sbufsnd (&so->so_snd.sb_lock) 2nd 0xfffffd806e2869e8 inode (&ip->i_lock) lock order [1] sbufsnd (&so->so_snd.sb_lock) -> [2] inode (&ip->i_lock) lock order data 0xffffffff833d32bf -> 0xffffffff8334590b 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:870 #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:746 #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+0x3e1 sys/kern/uipc_socket.c:1347 #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:746 #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(fffffd806e2869e8,9,0) at witness_checkorder+0x10b9 sys/kern/subr_witness.c:-1 rw_do_enter_write(fffffd806e2869d0,1) at rw_do_enter_write+0xba sys/kern/kern_rwlock.c:234 rrw_enter(fffffd806e2869d0,1) at rrw_enter+0xc6 sys/kern/kern_rwlock.c:621 VOP_LOCK(fffffd80704becb0,2001) at VOP_LOCK+0xa3 sys/kern/vfs_vops.c:527 vn_lock(fffffd80704becb0,2001) at vn_lock+0xa4 sys/kern/vfs_vnops.c:570 vfs_lookup(ffff8000303d5270) at vfs_lookup+0x11c sys/kern/vfs_lookup.c:-1 namei(ffff8000303d5270) at namei+0x7ca sys/kern/vfs_lookup.c:250 unp_connect(ffff80000151e6e0,fffffd8066359900,ffff8000307d6038) at unp_connect+0x29d sys/kern/uipc_usrreq.c:872 uipc_dgram_send(ffff80000151e6e0,fffffd80666a5500,fffffd8066359900,0) at uipc_dgram_send+0x163 sys/kern/uipc_usrreq.c:609 sosend(ffff80000151e6e0,fffffd8066359900,ffff8000303d54f8,0,0,e) at sosend+0x804 sys/kern/uipc_socket.c:-1 sendit(ffff8000307d6038,3,ffff8000303d5678,e,ffff8000303d5730) at sendit+0x5a5 sys/kern/uipc_syscalls.c:785 sys_sendmsg(ffff8000307d6038,ffff8000303d57e0,ffff8000303d5730) at sys_sendmsg+0x246 sys/kern/uipc_syscalls.c:603 syscall(ffff8000303d57e0) at syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff8000303d57e0) at syscall+0xbd4 sys/arch/amd64/amd64/trap.c:746 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xc7f61e2ee00, count: -15 ddb{0}> show registers rdi 0 rsi 0x80000 acpi_pdirpa+0x6be71 rbp 0xffff8000303d4ef0 rbx 0 rdx 0xffff80000145d6c0 rcx 0xffff8000307d6038 rax 0x7ffff acpi_pdirpa+0x6be70 r8 0xffff8000303d4dd0 r9 0x8080808080808080 r10 0xefa013757be03824 r11 0xee2f5f1e663614e3 r12 0xfffffd8003eff680 r13 0xfffffd80046e79b0 r14 0x3 r15 0xffffffff833e2b64 substchar+0xf1da rip 0xffffffff831577a5 db_enter+0x25 cs 0x8 rflags 0x246 rsp 0xffff8000303d4ee0 ss 0x10 db_enter+0x25: addq $0x8,%rsp ddb{0}> show proc PROC (syz-executor) tid=250914 pid=86500 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=0xffff8000307d7260,0xffffffff83917b08 process=0xffff80003c418e90 user=0xffff8000303d0000, vmspace=0xfffffd800d779020 estcpu=36, cpticks=0, pctcpu=0.0, user=0, sys=0, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND 86500 368058 10593 0 2 0 syz-executor *86500 250914 10593 0 7 0x4000000 syz-executor 89399 193173 31860 0 2 0 syz-executor 89399 431877 31860 0 2 0x4000000 syz-executor 25864 211191 14339 60929 2 0x10 syz-executor 25864 419013 14339 60929 3 0x4000090 fsleep syz-executor 25864 22574 14339 60929 3 0x4000090 fsleep syz-executor 34082 143314 69495 0 3 0x80 nanoslp syz-executor 34082 297564 69495 0 3 0x4000080 sbwait syz-executor 34082 85867 69495 0 3 0x4000080 fsleep syz-executor 45757 146716 0 0 3 0x14200 acct acct 43743 333386 18757 0 3 0x82 nanoslp syz-executor 22110 187632 18757 0 3 0x82 wait syz-executor 69495 434859 18757 0 3 0x82 nanoslp syz-executor 31860 497586 18757 0 3 0x82 nanoslp syz-executor 38863 379229 1 0 3 0x100083 ttyin getty 38537 178794 0 0 3 0x14200 bored sosplice 94830 298273 0 0 3 0x14280 nfsidl nfsio 51849 254312 0 0 3 0x14280 nfsidl nfsio 24386 196816 0 0 3 0x14280 nfsidl nfsio 38917 221171 0 0 3 0x14280 nfsidl nfsio 77740 420676 0 0 3 0x14280 nfsidl nfsio 47051 347155 0 0 3 0x14280 nfsidl nfsio 69629 472535 0 0 3 0x14280 nfsidl nfsio 48505 305082 0 0 3 0x14280 nfsidl nfsio 11914 99095 0 0 3 0x14280 nfsidl nfsio 31253 45234 0 0 3 0x14280 nfsidl nfsio 66179 269588 0 0 3 0x14280 nfsidl nfsio 90569 437334 0 0 3 0x14280 nfsidl nfsio 14664 517690 0 0 3 0x14280 nfsidl nfsio 52550 331221 0 0 3 0x14280 nfsidl nfsio 41288 467308 0 0 3 0x14280 nfsidl nfsio 59983 342209 0 0 3 0x14280 nfsidl nfsio 67148 332022 0 0 3 0x14280 nfsidl nfsio 67269 442911 0 0 3 0x14280 nfsidl nfsio 17631 185231 0 0 3 0x14280 nfsidl nfsio 75883 507752 0 0 3 0x14280 nfsidl nfsio 10593 31783 18757 0 3 0x82 nanoslp syz-executor 77545 38412 18757 0 3 0x82 wait syz-executor 64358 419877 18757 0 3 0x82 piperd syz-executor 14339 500258 18757 0 3 0x82 nanoslp syz-executor 18757 91746 45474 0 2 0x2 syz-executor 45474 414270 86223 0 3 0x10008a sigsusp ksh 86223 191243 91108 0 3 0x98 kqread sshd-session 91108 293209 72757 0 3 0x92 kqread sshd-session 72757 459211 1 0 3 0x88 kqread sshd 67060 323592 33210 74 3 0x1100092 bpf pflogd 33210 44058 1 0 3 0x80 sbwait pflogd 14442 273438 1486 73 3 0x1100090 kqread syslogd 1486 141706 1 0 3 0x100082 sbwait syslogd 40867 279749 1 0 3 0x100080 kqread resolvd 27133 172913 15672 77 3 0x100092 kqread dhcpleased 7361 283203 15672 77 3 0x100092 kqread dhcpleased 15672 396743 1 0 3 0x80 kqread dhcpleased 5556 50776 0 0 3 0x14200 bored smr 33416 136207 0 0 2 0x14200 zerothread 86448 385432 0 0 3 0x14200 aiodoned aiodoned 65473 305180 0 0 3 0x14200 syncer update 29123 370889 0 0 3 0x14200 cleaner cleaner 11116 302792 0 0 3 0x14200 reaper reaper 14711 210977 0 0 3 0x14200 pgdaemon pagedaemon 54137 394802 0 0 3 0x14200 bored viomb 47633 168717 0 0 3 0x40014200 acpi0 acpi0 9076 160551 0 0 7 0x40014200 idle1 12778 268205 0 0 3 0x14200 bored softnet1 31497 122768 0 0 3 0x14200 bored softnet0 68365 158878 0 0 3 0x14200 bored systqmp 68594 261730 0 0 3 0x14200 bored systq 713 66097 0 0 3 0x14200 tmoslp softclockmp 87285 210213 0 0 3 0x40014200 tmoslp softclock 85295 433236 0 0 3 0x40014200 idle0 1 149044 0 0 3 0x80082 wait init 0 0 -1 0 3 0x10010200 scheduler swapper ddb{0}> show all locks Process 86500 (syz-executor) thread 0xffff8000307d6038 (250914) exclusive kernel_lock &kernel_lock r = 0 (0xffffffff83915fc0) #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:746 #7 Xsyscall+0x128 exclusive rwlock sbufsnd r = 0 (0xffff80000151e8c8) #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:631 #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:746 #7 Xsyscall+0x128 ddb{0}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10236 11051K 11500K 166960K 14544 0 pcb 17 16K 30K 166960K 635 0 rtable 187 10K 11K 166960K 630 0 pf 39 18K 20K 166960K 190 0 ifaddr 36 6K 8K 166960K 133 0 ifgroup 59 2K 2K 166960K 206 0 sysctl 3 1K 9K 166960K 22 0 counters 70 37K 37K 166960K 256 0 ioctlops 0 0K 4K 166960K 1940 0 iov 0 0K 20K 166960K 233 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1427 90K 90K 166960K 3462 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 9K 166960K 35 0 VM map 2 1K 1K 166960K 2 0 sem 21 3K 3K 166960K 51 0 dirhash 12 2K 3K 166960K 60 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 17 61K 93K 166960K 2025 0 sigio 2 0K 0K 166960K 41 0 proc 74 131K 164K 166960K 889 0 subproc 72 4K 4K 166960K 118 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 230 0 in_multi 63 4K 7K 166960K 230 0 ether_multi 1 0K 0K 166960K 15 0 mrt 1 0K 0K 166960K 20 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 247 1102K 1102K 166960K 247 0 exec 0 0K 1K 166960K 660 0 fusefs mount 1 32K 32K 166960K 1 0 pfkey data 0 0K 0K 166960K 3 0 tdb 3 0K 0K 166960K 3 0 VM swap 8 62K 64K 166960K 10 0 UVM amap 256 168K 178K 166960K 19675 0 UVM aobj 16 2K 2K 166960K 16 0 pinsyscall 42 84K 101K 166960K 3276 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 106 0 NDP 13 0K 2K 166960K 97 0 temp 79 8656K 8912K 166960K 89140 0 kqueue 14 22K 33K 166960K 357 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 120 313 0 310 6 4 2 3 0 8 1 rtentry 176 190 0 119 5 0 5 5 0 8 0 unpcb 144 1810 0 1788 10 5 5 6 0 8 4 syncache 336 11 0 11 1 1 0 1 0 8 0 tcpqe 32 4 0 4 2 2 0 1 0 8 0 tcpcb 736 782 0 773 9 4 5 7 0 8 3 arp 136 27 0 17 1 0 1 1 0 8 0 ipq 40 1 0 1 1 1 0 1 0 8 0 ipqe 40 3 0 3 1 1 0 1 0 8 0 inpcb 328 2479 0 2466 16 9 7 13 0 8 5 nd6 152 34 0 18 1 0 1 1 0 8 0 pkpcb 40 13 0 13 3 2 1 1 0 8 1 kcovpl 48 13 0 5 1 0 1 1 0 8 0 mppekey 1024 1 0 1 1 1 0 1 0 8 0 ppxss 1192 81 0 81 1 0 1 1 0 8 1 pppxif 1504 4 0 4 2 1 1 1 0 8 1 pfstscr 40 3 0 2 2 1 1 1 0 8 0 pffrag 232 10 0 4 1 0 1 1 0 482 0 pffrnode 88 10 0 4 1 0 1 1 0 8 0 pffrent 40 56 0 50 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 1 0 1 1 1 0 1 0 8 0 pfstitem 24 107 0 26 1 0 1 1 0 8 0 pfstkey 128 108 0 27 3 0 3 3 0 8 0 pfstate 384 107 0 27 9 0 9 9 0 8 0 pfrule 1344 27 0 21 2 1 1 2 0 8 0 rttmr 136 2 0 2 2 2 0 1 0 8 0 art_heap8 4096 3 0 0 3 0 3 3 0 8 0 art_heap4 256 880 0 573 29 7 22 29 0 8 0 art_table 40 883 0 573 5 0 5 5 0 8 0 art_node 32 190 0 132 1 0 1 1 0 8 0 sysvmsgpl 40 19 0 14 1 0 1 1 0 8 0 semupl 112 6 0 6 1 1 0 1 0 8 0 semapl 112 40 0 21 1 0 1 1 0 8 0 shmpl 112 13 0 0 1 0 1 1 0 8 0 dirhash 1024 50 0 33 3 0 3 3 0 8 0 dino2pl 256 5152 0 3642 96 0 96 96 0 8 0 ffsino 296 5152 0 3642 118 0 118 118 0 8 0 nchpl 144 7886 0 6179 64 0 64 64 0 8 0 rtmask 32 21 0 21 1 0 1 1 0 8 1 uvmvnodes 80 5926 0 0 121 0 121 121 0 8 0 vnodes 216 5926 0 0 330 0 330 330 0 8 0 namei 1024 29601 0 29600 2 1 1 2 0 8 0 percpumem 16 143 0 93 1 0 1 1 0 8 0 kstatmem 264 144 0 114 3 0 3 3 0 8 0 acpiwqpl 32 1 0 1 1 0 1 1 1 8 1 scsiplug 72 9 0 9 2 1 1 1 0 8 1 scxspl 216 38851 0 38851 11 8 3 8 1 8 3 plimitpl 152 547 0 528 1 0 1 1 0 8 0 sigapl 424 2348 0 2279 8 0 8 8 0 8 0 knotepl 120 547 0 0 17 0 17 17 0 8 0 kqueuepl 224 937 0 925 10 5 5 5 0 8 3 pipepl 344 483 0 454 9 6 3 9 0 8 0 fdescpl 528 2305 0 2274 3 0 3 3 0 8 0 filepl 160 17220 0 16984 21 3 18 19 0 8 6 lockfpl 104 1317 0 1315 2 1 1 2 0 8 0 lockfspl 48 503 0 501 1 0 1 1 0 8 0 sessionpl 144 34 0 25 1 0 1 1 0 8 0 pgrppl 48 67 0 50 1 0 1 1 0 8 0 ucredpl 104 2630 0 2615 1 0 1 1 0 8 0 zombiepl 144 2282 0 2279 1 0 1 1 0 8 0 processpl 1232 2348 0 2279 6 0 6 6 0 8 0 procpl 664 5378 0 5303 8 0 8 8 0 8 0 sosppl 168 11 0 11 3 2 1 1 0 8 1 sockpl 752 4739 0 4701 44 32 12 20 0 8 7 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 mcl9k 9216 2 0 0 1 0 1 1 0 8 0 mcl8k 8192 3 0 0 1 0 1 1 0 8 0 mcl4k 4096 111 0 0 14 0 14 14 0 8 0 mcl2k 2048 69 0 0 9 1 8 8 0 8 0 mtagpl 96 14 0 0 1 0 1 1 0 8 0 mbufpl 256 1967 0 0 123 0 123 123 0 8 0 bufpl 280 17267 0 11124 439 0 439 439 0 8 0 anonpl 32 11511 0 0 93 0 93 93 0 246 0 amapchunkpl 152 68162 0 67619 35 8 27 31 0 158 3 amappl16 200 8104 0 8069 33 18 15 24 0 8 7 amappl15 192 4 0 4 2 2 0 1 0 8 0 amappl14 184 134 0 122 1 0 1 1 0 8 0 amappl13 176 7 0 6 1 0 1 1 0 8 0 amappl12 168 3042 0 3010 3 1 2 2 0 8 0 amappl11 160 51 0 37 1 0 1 1 0 8 0 amappl10 152 4 0 4 1 1 0 1 0 8 0 amappl9 144 255 0 255 1 1 0 1 0 8 0 amappl8 136 23 0 20 1 0 1 1 0 8 0 amappl7 128 123 0 110 1 0 1 1 0 8 0 amappl6 120 259 0 255 1 0 1 1 0 8 0 amappl5 112 159 0 149 1 0 1 1 0 8 0 amappl4 104 329 0 309 1 0 1 1 0 8 0 amappl3 96 12024 0 11913 4 1 3 3 0 8 0 amappl2 88 2598 0 2516 2 0 2 2 0 8 0 amappl1 80 17656 0 17057 15 0 15 15 0 8 0 amappl 88 18584 0 18402 5 0 5 5 0 92 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 6 0 6 1 1 0 1 0 8 0 dma128 128 258 0 258 4 3 1 1 0 8 1 dma64 64 7 0 7 2 1 1 1 0 8 1 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 15 0 0 1 0 1 1 0 8 0 uaddrrnd 24 2305 0 2274 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 2305 0 2274 1 0 1 1 0 8 0 vmmpekpl 168 19916 0 19864 3 0 3 3 0 8 0 vmmpepl 168 148802 0 146778 107 5 102 107 0 357 7 vmsppl 488 2304 0 2274 5 0 5 5 0 8 0 rwobjpl 80 45506 0 38591 146 0 146 146 0 8 4 pdppl 4096 4618 0 4548 110 38 72 86 0 8 2 pvpl 32 18749 0 0 153 2 151 151 0 265 0 pmappl 256 2304 0 2274 3 0 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 411 0 55 11 0 11 11 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(fffffd806e2869e8,9,0) at witness_checkorder+0x10b9 sys/kern/subr_witness.c:-1 rw_do_enter_write(fffffd806e2869d0,1) at rw_do_enter_write+0xba sys/kern/kern_rwlock.c:234 rrw_enter(fffffd806e2869d0,1) at rrw_enter+0xc6 sys/kern/kern_rwlock.c:621 VOP_LOCK(fffffd80704becb0,2001) at VOP_LOCK+0xa3 sys/kern/vfs_vops.c:527 vn_lock(fffffd80704becb0,2001) at vn_lock+0xa4 sys/kern/vfs_vnops.c:570 vfs_lookup(ffff8000303d5270) at vfs_lookup+0x11c sys/kern/vfs_lookup.c:-1 namei(ffff8000303d5270) at namei+0x7ca sys/kern/vfs_lookup.c:250 unp_connect(ffff80000151e6e0,fffffd8066359900,ffff8000307d6038) at unp_connect+0x29d sys/kern/uipc_usrreq.c:872 uipc_dgram_send(ffff80000151e6e0,fffffd80666a5500,fffffd8066359900,0) at uipc_dgram_send+0x163 sys/kern/uipc_usrreq.c:609 sosend(ffff80000151e6e0,fffffd8066359900,ffff8000303d54f8,0,0,e) at sosend+0x804 sys/kern/uipc_socket.c:-1 sendit(ffff8000307d6038,3,ffff8000303d5678,e,ffff8000303d5730) at sendit+0x5a5 sys/kern/uipc_syscalls.c:785 sys_sendmsg(ffff8000307d6038,ffff8000303d57e0,ffff8000303d5730) at sys_sendmsg+0x246 sys/kern/uipc_syscalls.c:603 syscall(ffff8000303d57e0) at syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff8000303d57e0) at syscall+0xbd4 sys/arch/amd64/amd64/trap.c:746 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xc7f61e2ee00, 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 acpicpu_idle() at acpicpu_idle+0x457 sys/dev/acpi/acpicpu_x86.c:1224 sched_idle(ffff8000299edff0) at sched_idle+0x391 sys/kern/kern_sched.c:191 end trace frame: 0x0, count: -5