witness: lock order reversal: 1st 0xffff8000014c4488 sbufrcv (&so->so_rcv.sb_lock) 2nd 0xfffffd806c652580 inode (&ip->i_lock) lock order [1] sbufrcv (&so->so_rcv.sb_lock) -> [2] inode (&ip->i_lock) lock order data 0xffffffff83326dc0 -> 0xffffffff833759dd is missing lock order [2] inode (&ip->i_lock) -> [1] 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+0xdf9 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 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(fffffd806c652580,9,0) at witness_checkorder+0x10d1 sys/kern/subr_witness.c:-1 rw_do_enter_write(fffffd806c652568,1) at rw_do_enter_write+0xba sys/kern/kern_rwlock.c:234 rrw_enter(fffffd806c652568,1) at rrw_enter+0xc6 sys/kern/kern_rwlock.c:621 VOP_LOCK(fffffd80613b6118,2001) at VOP_LOCK+0xbd sys/kern/vfs_vops.c:527 vn_lock(fffffd80613b6118,2001) at vn_lock+0xa4 sys/kern/vfs_vnops.c:570 vfs_getcwd_common(fffffd80613b6118,fffffd80613b6c10,0,0,200,0,298722589d808e3) at vfs_getcwd_common+0xd1 sys/kern/vfs_getcwd.c:287 vn_isunder(fffffd80613b6118,fffffd80613b6c10,ffff80003b00d780) at vn_isunder+0x56 sys/kern/vfs_vnops.c:694 unp_externalize(fffffd806c523400,33,0) at unp_externalize+0x26f sys/kern/uipc_usrreq.c:1090 soreceive(ffff8000014c4398,ffff80003b01ee78,ffff80003b01ee28,0,ffff80003b01ee60,ffff80003b01efec,e0c2c75c2695deba) at soreceive+0xc24 sys/kern/uipc_socket.c:1017 recvit(ffff80003b00d780,5,ffff80003b01efc0,0,ffff80003b01f070) at recvit+0x40b sys/kern/uipc_syscalls.c:1078 sys_recvmsg(ffff80003b00d780,ffff80003b01f120,ffff80003b01f070) at sys_recvmsg+0x1bf sys/kern/uipc_syscalls.c:878 syscall(ffff80003b01f120) at syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003b01f120) at syscall+0xbd4 sys/arch/amd64/amd64/trap.c:765 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x690de52de30, count: -14 ddb{0}> show registers rdi 0 rsi 0x80000 acpi_pdirpa+0x6be71 rbp 0xffff80003b01e900 rbx 0 rdx 0xffff800001451140 rcx 0xffff80003b00d780 rax 0x7ffff acpi_pdirpa+0x6be70 r8 0xffff80003b01e7e0 r9 0x8080808080808080 r10 0x5a303d7ff4afa49e r11 0x610524a41eb8ee7 r12 0xfffffd8003f41840 r13 0xfffffd8004729570 r14 0x3 r15 0xffffffff8340ae0e substchar+0x3fb2 rip 0xffffffff82f02855 db_enter+0x25 cs 0x8 rflags 0x246 rsp 0xffff80003b01e8f0 ss 0x10 db_enter+0x25: addq $0x8,%rsp ddb{0}> show proc PROC (syz-executor) tid=91968 pid=91951 tcnt=2 stat=onproc flags process=1000000 proc=4000000 runpri=32, usrpri=86, slppri=32, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff80003b00da18,0xffff80003b00cfc8 process=0xffff80002a3cc4e8 user=0xffff80003b01a000, vmspace=0xfffffd806c8f13f8 estcpu=36, cpticks=0, pctcpu=0.0, user=0, sys=0, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND 91951 449841 72433 0 2 0x1000000 syz-executor *91951 91968 72433 0 7 0x5000000 syz-executor 14015 260076 87619 0 2 0 syz-executor 14015 443961 87619 0 3 0x4000080 fsleep syz-executor 49373 400563 72294 0 3 0x80 nanoslp syz-executor 49373 177759 72294 0 3 0x4000080 kqsel syz-executor 49373 364245 72294 0 3 0x4000080 kqsel syz-executor 49373 126385 72294 0 3 0x4000080 fsleep syz-executor 65987 426430 52188 0 3 0x80 nanoslp syz-executor 65987 58080 52188 0 3 0x4000080 ttyin syz-executor 65987 394530 52188 0 3 0x4000080 fsleep syz-executor 65987 491951 52188 0 3 0x4000080 fsleep syz-executor 71706 50567 25317 -1 3 0x90 nanoslp syz-executor 71706 173659 25317 -1 3 0x4000090 sbwait syz-executor 71706 129294 25317 -1 3 0x4000010 sbufrcv syz-executor 71706 202394 25317 -1 3 0x4000090 fsleep syz-executor 71706 206659 25317 -1 3 0x4000090 fsleep syz-executor 27484 74699 98241 0 3 0x80 nanoslp syz-executor 27484 86829 98241 0 3 0x4000080 piperd syz-executor 27484 332765 98241 0 3 0x4000080 fsleep syz-executor 52188 162118 53263 0 3 0x82 nanoslp syz-executor 15099 39966 0 0 3 0x14200 acct acct 74372 204353 1 0 3 0x100083 ttyin getty 52240 259349 53263 0 3 0x82 nanoslp syz-executor 25317 515886 53263 0 3 0x82 nanoslp syz-executor 72433 329351 53263 0 3 0x82 nanoslp syz-executor 98241 114399 53263 0 3 0x82 nanoslp syz-executor 72294 430251 53263 0 3 0x82 nanoslp syz-executor 87619 363315 53263 0 3 0x82 nanoslp syz-executor 97141 358364 53263 0 3 0x82 nanoslp syz-executor 53263 328954 25587 0 3 0x82 kqread syz-executor 25587 423913 6015 0 3 0x10008a sigsusp ksh 6015 406112 25218 0 3 0x98 kqread sshd-session 25218 319274 90300 0 3 0x92 kqread sshd-session 90300 367043 1 0 3 0x88 kqread sshd 70918 442123 97923 74 3 0x1100092 bpf pflogd 97923 366135 1 0 3 0x80 sbwait pflogd 18220 59353 77901 73 3 0x1100090 kqread syslogd 77901 470903 1 0 3 0x100082 sbwait syslogd 13205 244797 1 0 3 0x100080 kqread resolvd 87166 234280 33197 77 3 0x100092 kqread dhcpleased 34972 18686 33197 77 3 0x100092 kqread dhcpleased 33197 103563 1 0 3 0x80 kqread dhcpleased 77265 491432 0 0 3 0x14200 bored smr 24710 186664 0 0 3 0x14200 pgzero zerothread 23797 382945 0 0 3 0x14200 aiodoned aiodoned 40127 319134 0 0 3 0x14200 syncer update 61137 70626 0 0 3 0x14200 cleaner cleaner 1392 320647 0 0 2 0x14200 reaper 51147 501142 0 0 3 0x14200 pgdaemon pagedaemon 38095 102974 0 0 3 0x14200 bored viomb 98590 508835 0 0 3 0x40014200 acpi0 acpi0 11974 137764 0 0 3 0x40014200 idle1 34014 291825 0 0 3 0x14200 bored softnet1 11485 192936 0 0 3 0x14200 bored softnet0 20101 423316 0 0 3 0x14200 smrbar systqmp 42352 60566 0 0 3 0x14200 bored systq 17755 415388 0 0 3 0x14200 tmoslp softclockmp 70072 481186 0 0 3 0x40014200 tmoslp softclock 40825 160822 0 0 3 0x40014200 idle0 1 153996 0 0 3 0x82 wait init 0 0 -1 0 3 0x10010200 scheduler swapper ddb{0}> show all locks Process 91951 (syz-executor) thread 0xffff80003b00d780 (91968) exclusive kernel_lock &kernel_lock r = 0 (0xffffffff83933048) #0 witness_lock+0x5f1 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5f1 sys/kern/subr_witness.c:1160 #1 unp_externalize+0x155 sys/kern/uipc_usrreq.c:-1 #2 soreceive+0xc24 sys/kern/uipc_socket.c:1017 #3 recvit+0x40b sys/kern/uipc_syscalls.c:1078 #4 sys_recvmsg+0x1bf sys/kern/uipc_syscalls.c:878 #5 syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline] #5 syscall+0xbd4 sys/arch/amd64/amd64/trap.c:765 #6 Xsyscall+0x128 exclusive rwlock sbufrcv r = 0 (0xffff8000014c4488) #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 soreceive+0x27d sys/kern/uipc_socket.c:878 #4 recvit+0x40b sys/kern/uipc_syscalls.c:1078 #5 sys_recvmsg+0x1bf sys/kern/uipc_syscalls.c:878 #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 71706 (syz-executor) thread 0xffff8000fffef4d8 (173659) exclusive rwlock sbufrcv r = 0 (0xffff8000014c6d50) #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 soreceive+0x27d sys/kern/uipc_socket.c:878 #4 recvit+0x40b sys/kern/uipc_syscalls.c:1078 #5 sys_recvmmsg+0x410 sys/kern/uipc_syscalls.c:969 #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 20101 (systqmp) thread 0xffff8000ffffe530 (423316) shared rwlock systqmp r = 0 (0xffffffff8387e3e8) #0 witness_lock+0x5f1 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5f1 sys/kern/subr_witness.c:1160 #1 taskq_thread+0x12a sys/kern/kern_task.c:442 #2 proc_trampoline+0x10 ddb{0}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10214 11226K 11357K 166960K 12061 0 pcb 18 16K 21K 166960K 355 0 rtable 218 10K 10K 166960K 468 0 pf 41 19K 22K 166960K 112 0 ifaddr 40 6K 7K 166960K 72 0 ifgroup 53 2K 2K 166960K 102 0 sysctl 4 1K 9K 166960K 11 0 counters 68 36K 37K 166960K 128 0 ioctlops 0 0K 4K 166960K 1733 0 iov 2 16K 16K 166960K 25 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1414 89K 89K 166960K 1872 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 9 0K 0K 166960K 79 0 dirhash 12 2K 2K 166960K 15 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 17 61K 89K 166960K 679 0 sigio 0 0K 0K 166960K 10 0 proc 72 115K 164K 166960K 603 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 100 0 in_multi 84 6K 7K 166960K 138 0 ether_multi 1 0K 0K 166960K 7 0 mrt 3 0K 0K 166960K 10 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 91 413K 413K 166960K 91 0 exec 0 0K 1K 166960K 493 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 258 159K 176K 166960K 8020 0 UVM aobj 16 8K 10K 166960K 18 0 pinsyscall 42 84K 107K 166960K 1838 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 37 0 NDP 12 0K 2K 166960K 47 0 temp 57 8662K 8728K 166960K 14169 0 kqueue 13 20K 29K 166960K 130 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 74 0 70 1 0 1 1 0 8 0 rtentry 176 138 0 49 5 0 5 5 0 8 0 unpcb 144 520 0 490 7 5 2 4 0 8 0 syncache 336 4 0 4 2 1 1 1 0 8 1 tcpqe 32 10 0 10 1 1 0 1 0 8 0 tcpcb 736 187 0 182 7 3 4 4 0 8 3 arp 136 21 0 4 1 0 1 1 0 8 0 inpcb 328 748 0 736 14 10 4 12 0 8 2 nd6 152 31 0 10 1 0 1 1 0 8 0 pkpcb 40 4 0 4 1 0 1 1 0 8 1 kcovpl 48 9 0 1 1 0 1 1 0 8 0 mppekey 1024 1 0 1 1 1 0 1 0 8 0 ppxss 1192 25 0 24 3 2 1 1 0 8 0 pppxif 1504 1 0 1 1 1 0 1 0 8 0 pfstscr 40 13 0 12 1 0 1 1 0 8 0 pffrag 232 8 0 6 1 0 1 1 0 482 0 pffrnode 88 8 0 6 1 0 1 1 0 8 0 pffrent 40 14 0 12 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 2 0 0 1 0 1 1 0 8 0 pfanchor 1288 2 0 0 1 0 1 1 0 8 0 pftag 88 1 0 0 1 0 1 1 0 8 0 pfstitem 24 64 0 29 1 0 1 1 0 8 0 pfstkey 128 75 0 27 2 0 2 2 0 8 0 pfstate 448 62 0 28 5 0 5 5 0 8 1 pfrule 1344 29 0 22 2 1 1 2 0 8 0 rttmr 136 2 0 2 1 1 0 1 0 8 0 art_heap8 4096 2 0 0 2 0 2 2 0 8 0 art_heap4 256 637 0 253 31 4 27 31 0 8 2 art_table 40 639 0 253 5 0 5 5 0 8 0 art_node 32 137 0 53 1 0 1 1 0 8 0 sysvmsgpl 40 5 0 3 1 0 1 1 0 8 0 semupl 112 2 0 2 1 1 0 1 0 8 0 semapl 112 76 0 69 1 0 1 1 0 8 0 shmpl 112 11 0 1 1 0 1 1 0 8 0 dirhash 1024 19 0 2 3 0 3 3 0 8 0 dino2pl 256 2552 0 1044 95 0 95 95 0 8 0 ffsino 296 2552 0 1044 117 0 117 117 0 8 0 nchpl 144 3521 0 1816 64 0 64 64 0 8 0 rtmask 32 4 0 4 2 1 1 1 0 8 1 vnodes 216 2970 0 0 165 0 165 165 0 8 0 namei 1024 11415 0 11415 1 0 1 1 0 8 1 percpumem 16 79 0 30 1 0 1 1 0 8 0 vcpupl 3968 4 0 1 1 0 1 1 0 8 0 vmpool 840 4 0 1 1 0 1 1 0 8 0 kstatmem 264 60 0 34 3 1 2 3 0 8 0 scsiplug 72 3 0 3 2 1 1 1 0 8 1 scxspl 216 12981 0 12981 11 8 3 8 1 8 3 plimitpl 152 123 0 101 1 0 1 1 0 8 0 sigapl 424 989 0 940 7 1 6 7 0 8 0 knotepl 120 486 0 0 15 0 15 15 0 8 0 kqueuepl 224 206 0 195 2 1 1 2 0 8 0 pipepl 344 155 0 126 3 0 3 3 0 8 0 fdescpl 528 971 0 940 3 0 3 3 0 8 0 filepl 160 5442 0 5192 24 11 13 18 0 8 2 lockfpl 104 188 0 185 1 0 1 1 0 8 0 lockfspl 48 87 0 84 1 0 1 1 0 8 0 sessionpl 144 25 0 16 1 0 1 1 0 8 0 pgrppl 48 41 0 24 1 0 1 1 0 8 0 ucredpl 104 750 0 736 1 0 1 1 0 8 0 zombiepl 144 942 0 940 2 1 1 1 0 8 0 processpl 1232 989 0 940 5 1 4 5 0 8 0 procpl 664 1972 0 1908 6 0 6 6 0 8 0 sosppl 176 3 0 3 1 1 0 1 0 8 0 sockpl 752 1434 0 1388 24 17 7 17 0 8 2 mcl64k 65536 3 0 0 1 0 1 1 0 8 0 mcl16k 16384 3 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 2 0 0 1 0 1 1 0 8 0 mcl4k 4096 131 0 0 17 0 17 17 0 8 0 mcl2k 2048 27 0 0 4 0 4 4 0 8 0 mtagpl 96 11 0 0 1 0 1 1 0 8 0 mbufpl 256 176 0 0 11 0 11 11 0 8 0 bufpl 280 4501 0 130 313 0 313 313 0 8 0 anonpl 32 7545 0 0 61 0 61 61 0 246 0 amapchunkpl 152 26011 0 25469 40 13 27 40 0 158 5 amappl16 200 2285 0 2251 6 2 4 5 0 8 0 amappl15 192 5 0 5 1 1 0 1 0 8 0 amappl14 184 4 0 4 1 1 0 1 0 8 0 amappl13 176 438 0 436 1 0 1 1 0 8 0 amappl12 168 1338 0 1296 3 0 3 3 0 8 0 amappl11 160 19 0 19 2 2 0 1 0 8 0 amappl10 152 49 0 35 1 0 1 1 0 8 0 amappl9 144 317 0 317 1 1 0 1 0 8 0 amappl8 136 25 0 23 1 0 1 1 0 8 0 amappl7 128 112 0 111 1 0 1 1 0 8 0 amappl6 120 288 0 275 1 0 1 1 0 8 0 amappl5 112 70 0 60 1 0 1 1 0 8 0 amappl4 104 421 0 390 1 0 1 1 0 8 0 amappl3 96 4409 0 4307 4 1 3 3 0 8 0 amappl2 88 1092 0 1015 2 0 2 2 0 8 0 amappl1 80 11675 0 11085 16 2 14 15 0 8 0 amappl 88 7175 0 6994 5 0 5 5 0 92 0 uvmvnodes 80 125 0 0 3 0 3 3 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 7 0 7 2 2 0 1 0 8 0 dma32 32 8 0 8 2 2 0 1 0 8 0 dma16 16 18 0 17 1 0 1 1 0 8 0 aobjpl 72 17 0 2 1 0 1 1 0 8 0 uaddrrnd 24 971 0 940 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 971 0 940 1 0 1 1 0 8 0 vmmpekpl 168 9574 0 9531 3 0 3 3 0 8 0 vmmpepl 168 67332 0 65375 95 4 91 91 0 357 3 vmsppl 488 970 0 939 6 1 5 5 0 8 0 rwobjpl 80 19874 0 18782 27 3 24 26 0 8 0 pdppl 4096 1958 0 1883 105 30 75 84 0 8 0 pvpl 32 13895 0 0 114 1 113 113 0 265 0 pmappl 256 974 0 940 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{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(fffffd806c652580,9,0) at witness_checkorder+0x10d1 sys/kern/subr_witness.c:-1 rw_do_enter_write(fffffd806c652568,1) at rw_do_enter_write+0xba sys/kern/kern_rwlock.c:234 rrw_enter(fffffd806c652568,1) at rrw_enter+0xc6 sys/kern/kern_rwlock.c:621 VOP_LOCK(fffffd80613b6118,2001) at VOP_LOCK+0xbd sys/kern/vfs_vops.c:527 vn_lock(fffffd80613b6118,2001) at vn_lock+0xa4 sys/kern/vfs_vnops.c:570 vfs_getcwd_common(fffffd80613b6118,fffffd80613b6c10,0,0,200,0,298722589d808e3) at vfs_getcwd_common+0xd1 sys/kern/vfs_getcwd.c:287 vn_isunder(fffffd80613b6118,fffffd80613b6c10,ffff80003b00d780) at vn_isunder+0x56 sys/kern/vfs_vnops.c:694 unp_externalize(fffffd806c523400,33,0) at unp_externalize+0x26f sys/kern/uipc_usrreq.c:1090 soreceive(ffff8000014c4398,ffff80003b01ee78,ffff80003b01ee28,0,ffff80003b01ee60,ffff80003b01efec,e0c2c75c2695deba) at soreceive+0xc24 sys/kern/uipc_socket.c:1017 recvit(ffff80003b00d780,5,ffff80003b01efc0,0,ffff80003b01f070) at recvit+0x40b sys/kern/uipc_syscalls.c:1078 sys_recvmsg(ffff80003b00d780,ffff80003b01f120,ffff80003b01f070) at sys_recvmsg+0x1bf sys/kern/uipc_syscalls.c:878 syscall(ffff80003b01f120) at syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003b01f120) at syscall+0xbd4 sys/arch/amd64/amd64/trap.c:765 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x690de52de30, count: -14 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(ffffffff83932e40) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:142 [inline] __mp_lock(ffffffff83932e40) at __mp_lock+0x192 sys/kern/kern_lock.c:173 exit1(ffff80003b00cfb8,0,0,1) at exit1+0x701 sys/kern/kern_exit.c:260 sys_exit(ffff80003b00cfb8,ffff80003c455c10,ffff80003c455b60) at sys_exit+0x1a sys/kern/kern_exit.c:-1 syscall(ffff80003c455c10) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003c455c10) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:765 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x74ef11f5bea0, count: -8