panic: acquiring blockable sleep lock with spinlock or critical section held (kernel_lock) &kernel_lock Stopped at db_enter+0x18: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND 268561 41893 0 0 0 1 syz-executor.3 *297404 41893 0 0 0x4000000 0 syz-executor.3 db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:440 panic(ffffffff825a56b6) at panic+0x177 sys/kern/subr_prf.c:202 witness_checkorder(ffffffff82b47030,9,0) at witness_checkorder+0x116d sys/kern/subr_witness.c:833 __mp_lock(ffffffff82b46e28) at __mp_lock+0xa1 read_rflags machine/cpufunc.h:195 [inline] __mp_lock(ffffffff82b46e28) at __mp_lock+0xa1 intr_disable machine/cpufunc.h:216 [inline] __mp_lock(ffffffff82b46e28) at __mp_lock+0xa1 sys/kern/kern_lock.c:142 selwakeup(fffffd8077c23310) at selwakeup+0x16 klist_empty sys/sys/event.h:361 [inline] selwakeup(fffffd8077c23310) at selwakeup+0x16 sys/kern/sys_generic.c:885 sorwakeup(fffffd8077c231f8) at sorwakeup+0xc9 sys/kern/uipc_socket.c:1699 udp_sbappend(fffffd806f684270,fffffd8067c2c200,fffffd80671aa5b0,0,14,fffffd80671aa5c4,67cfad0090c80da1,0) at udp_sbappend+0x3b1 sys/netinet/udp_usrreq.c:638 udp_input(ffff80002b12dd68,ffff80002b12dd74,11,2) at udp_input+0xbcb sys/netinet/udp_usrreq.c:427 ip_deliver(ffff80002b12dd68,ffff80002b12dd74,11,2) at ip_deliver+0x322 sys/netinet/ip_input.c:657 ip_ours(ffff80002b12dd68,ffff80002b12dd74,ffff8000246bb000,0) at ip_ours+0x3ba sys/netinet/ip_input.c:616 ip_input_if(ffff80002b12dd68,ffff80002b12dd74,4,0,ffff800000689000) at ip_input_if+0x2a1 ipv4_input(ffff800000689000,fffffd80671aa500) at ipv4_input+0x48 sys/netinet/ip_input.c:242 if_input_local(ffff800000689000,fffffd80671aa500,2) at if_input_local+0x10e sys/net/if.c:774 ip_output(fffffd80671aa600,0,fffffd806f684de0,0,0,fffffd806f684d68,e208c024ee8180e7) at ip_output+0xb05 ip_mloopback sys/netinet/ip_output.c:1791 [inline] ip_output(fffffd80671aa600,0,fffffd806f684de0,0,0,fffffd806f684d68,e208c024ee8180e7) at ip_output+0xb05 sys/netinet/ip_output.c:332 end trace frame: 0xffff80002b12dfe0, count: 0 https://www.openbsd.org/ddb.html describes the minimum info required in bug reports. Insufficient info makes it difficult to find and fix bugs. ddb{0}> ddb{0}> set $lines = 0 ddb{0}> set $maxwidth = 0 ddb{0}> show panic *cpu0: acquiring blockable sleep lock with spinlock or critical section held (kernel_lock) &kernel_lock ddb{0}> trace db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:440 panic(ffffffff825a56b6) at panic+0x177 sys/kern/subr_prf.c:202 witness_checkorder(ffffffff82b47030,9,0) at witness_checkorder+0x116d sys/kern/subr_witness.c:833 __mp_lock(ffffffff82b46e28) at __mp_lock+0xa1 read_rflags machine/cpufunc.h:195 [inline] __mp_lock(ffffffff82b46e28) at __mp_lock+0xa1 intr_disable machine/cpufunc.h:216 [inline] __mp_lock(ffffffff82b46e28) at __mp_lock+0xa1 sys/kern/kern_lock.c:142 selwakeup(fffffd8077c23310) at selwakeup+0x16 klist_empty sys/sys/event.h:361 [inline] selwakeup(fffffd8077c23310) at selwakeup+0x16 sys/kern/sys_generic.c:885 sorwakeup(fffffd8077c231f8) at sorwakeup+0xc9 sys/kern/uipc_socket.c:1699 udp_sbappend(fffffd806f684270,fffffd8067c2c200,fffffd80671aa5b0,0,14,fffffd80671aa5c4,67cfad0090c80da1,0) at udp_sbappend+0x3b1 sys/netinet/udp_usrreq.c:638 udp_input(ffff80002b12dd68,ffff80002b12dd74,11,2) at udp_input+0xbcb sys/netinet/udp_usrreq.c:427 ip_deliver(ffff80002b12dd68,ffff80002b12dd74,11,2) at ip_deliver+0x322 sys/netinet/ip_input.c:657 ip_ours(ffff80002b12dd68,ffff80002b12dd74,ffff8000246bb000,0) at ip_ours+0x3ba sys/netinet/ip_input.c:616 ip_input_if(ffff80002b12dd68,ffff80002b12dd74,4,0,ffff800000689000) at ip_input_if+0x2a1 ipv4_input(ffff800000689000,fffffd80671aa500) at ipv4_input+0x48 sys/netinet/ip_input.c:242 if_input_local(ffff800000689000,fffffd80671aa500,2) at if_input_local+0x10e sys/net/if.c:774 ip_output(fffffd80671aa600,0,fffffd806f684de0,0,0,fffffd806f684d68,e208c024ee8180e7) at ip_output+0xb05 ip_mloopback sys/netinet/ip_output.c:1791 [inline] ip_output(fffffd80671aa600,0,fffffd806f684de0,0,0,fffffd806f684d68,e208c024ee8180e7) at ip_output+0xb05 sys/netinet/ip_output.c:332 udp_output(fffffd806f684d68,fffffd80671aa600,0,0) at udp_output+0x58d sys/netinet/udp_usrreq.c:1011 sosend(fffffd8077c23d38,0,ffff80002b12e178,0,0,0) at sosend+0x632 sys/kern/uipc_socket.c:582 dofilewritev(ffff8000260dc2a8,4,ffff80002b12e178,0,ffff80002b12e270) at dofilewritev+0x19c sys/kern/sys_generic.c:381 sys_write(ffff8000260dc2a8,ffff80002b12e218,ffff80002b12e270) at sys_write+0x83 sys/kern/sys_generic.c:301 syscall(ffff80002b12e2e0) at syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff80002b12e2e0) at syscall+0x489 sys/arch/amd64/amd64/trap.c:585 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x492fa06bc70, count: -20 ddb{0}> show registers rdi 0 rsi 0x1 rbp 0xffff80002b12d7a0 rbx 0xffffffff8294ebff cpu_info_full_primary+0x2bff rdx 0xffff800000bdfe00 rcx 0 rax 0xffff8000260dc2a8 r8 0x101010101010101 r9 0x8080808080808080 r10 0xb2c629d71defe3e5 r11 0x82f3c33cabc85342 r12 0xffffffff8294ea00 cpu_info_full_primary+0x2a00 r13 0 r14 0 r15 0x1 rip 0xffffffff81f18858 db_enter+0x18 cs 0x8 rflags 0x246 rsp 0xffff80002b12d790 ss 0x10 db_enter+0x18: addq $0x8,%rsp ddb{0}> show proc PROC (syz-executor.3) pid=297404 stat=onproc flags process=0 proc=4000000 pri=32, usrpri=78, nice=20 forw=0xffffffffffffffff, list=0xffff8000260dd268,0xffffffff82b44c30 process=0xffff8000ffff2580 user=0xffff80002b129000, vmspace=0xfffffd806a876b90 estcpu=36, cpticks=1, pctcpu=0.0 user=0, sys=1, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND 41893 268561 12043 0 7 0 syz-executor.3 *41893 297404 12043 0 7 0x4000000 syz-executor.3 26530 261174 8010 0 2 0 syz-executor.4 18375 198141 20312 0 2 0 syz-executor.7 18375 227721 20312 0 3 0x4000080 fsleep syz-executor.7 77342 124063 13787 0 2 0 syz-executor.5 77342 305273 13787 0 3 0x4000080 bell syz-executor.5 83011 3617 36974 0 2 0 syz-executor.0 83011 471546 36974 0 3 0x4000080 fsleep syz-executor.0 54191 51357 2468 0 2 0 syz-executor.1 54191 388444 2468 0 3 0x4000080 fsleep syz-executor.1 20312 465782 26313 0 3 0x82 nanoslp syz-executor.7 13787 183999 26313 0 3 0x82 nanoslp syz-executor.5 37222 410640 26313 0 3 0x82 nanoslp syz-executor.6 8010 329795 26313 0 3 0x82 nanoslp syz-executor.4 12043 216624 26313 0 3 0x82 nanoslp syz-executor.3 23150 267526 26313 0 3 0x82 nanoslp syz-executor.2 2468 265133 26313 0 3 0x82 nanoslp syz-executor.1 36974 338562 26313 0 3 0x82 nanoslp syz-executor.0 26313 280629 35240 0 3 0x82 thrsleep syz-fuzzer 26313 99653 35240 0 3 0x4000082 nanoslp syz-fuzzer 26313 352840 35240 0 3 0x4000082 thrsleep syz-fuzzer 26313 98633 35240 0 3 0x4000082 thrsleep syz-fuzzer 26313 1136 35240 0 3 0x4000082 kqread syz-fuzzer 26313 198363 35240 0 3 0x4000082 thrsleep syz-fuzzer 26313 431578 35240 0 3 0x4000082 thrsleep syz-fuzzer 26313 206699 35240 0 3 0x4000082 nanoslp syz-fuzzer 26313 33851 35240 0 3 0x4000082 thrsleep syz-fuzzer 35240 57937 89396 0 3 0x10008a sigsusp ksh 89396 465218 29030 0 3 0x9a kqread sshd 87951 167233 1 0 3 0x100083 ttyin getty 29030 260010 1 0 3 0x88 kqread sshd 54937 228292 62368 74 3 0x1100092 bpf pflogd 62368 258962 1 0 3 0x80 netio pflogd 31549 489726 68506 73 3 0x1100090 kqread syslogd 68506 502289 1 0 3 0x100082 netio syslogd 9345 88510 1 0 3 0x100080 kqread resolvd 16394 434259 62339 77 3 0x100092 kqread dhcpleased 99875 379582 62339 77 3 0x100092 kqread dhcpleased 62339 487472 1 0 3 0x80 kqread dhcpleased 6576 29471 0 0 3 0x14200 bored smr 67419 268378 0 0 2 0x14200 zerothread 56067 105965 0 0 3 0x14200 aiodoned aiodoned 81774 189879 0 0 3 0x14200 syncer update 59855 220535 0 0 3 0x14200 cleaner cleaner 47973 261560 0 0 3 0x14200 reaper reaper 63061 351602 0 0 3 0x14200 pgdaemon pagedaemon 12634 275339 0 0 3 0x14200 bored viomb 94846 60478 0 0 3 0x40014200 acpi0 acpi0 18830 228766 0 0 3 0x40014200 idle1 30157 25920 0 0 3 0x14200 bored softnet 58919 451751 0 0 3 0x14200 bored systqmp 6245 277847 0 0 3 0x14200 bored systq 45212 461120 0 0 3 0x40014200 bored softclock 56966 82429 0 0 3 0x40014200 idle0 1 183637 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{0}> show all locks CPU 0: exclusive mutex &table->inpt_mtx r = 0 (0xffffffff82a88990) #0 witness_lock+0x44d #1 mtx_enter_try+0x100 #2 mtx_enter+0x4b sys/kern/kern_lock.c:266 #3 udp_input+0x7b0 #4 ip_deliver+0x322 sys/netinet/ip_input.c:657 #5 ip_ours+0x3ba sys/netinet/ip_input.c:616 #6 ip_input_if+0x2a1 #7 ipv4_input+0x48 sys/netinet/ip_input.c:242 #8 if_input_local+0x10e sys/net/if.c:774 #9 ip_output+0xb05 ip_mloopback sys/netinet/ip_output.c:1791 [inline] #9 ip_output+0xb05 sys/netinet/ip_output.c:332 #10 udp_output+0x58d sys/netinet/udp_usrreq.c:1011 #11 sosend+0x632 sys/kern/uipc_socket.c:582 #12 dofilewritev+0x19c sys/kern/sys_generic.c:381 #13 sys_write+0x83 sys/kern/sys_generic.c:301 #14 syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline] #14 syscall+0x489 sys/arch/amd64/amd64/trap.c:585 #15 Xsyscall+0x128 Process 41893 (syz-executor.3) thread 0xffff8000260dc2a8 (297404) exclusive rwlock netlock r = 0 (0xffffffff828f7720) #0 witness_lock+0x44d #1 solock+0x86 sys/kern/uipc_socket2.c:295 #2 sosend+0x517 sys/kern/uipc_socket.c:570 #3 dofilewritev+0x19c sys/kern/sys_generic.c:381 #4 sys_write+0x83 sys/kern/sys_generic.c:301 #5 syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline] #5 syscall+0x489 sys/arch/amd64/amd64/trap.c:585 #6 Xsyscall+0x128 exclusive mutex &table->inpt_mtx r = 0 (0xffffffff82a88990) #0 witness_lock+0x44d #1 mtx_enter_try+0x100 #2 mtx_enter+0x4b sys/kern/kern_lock.c:266 #3 udp_input+0x7b0 #4 ip_deliver+0x322 sys/netinet/ip_input.c:657 #5 ip_ours+0x3ba sys/netinet/ip_input.c:616 #6 ip_input_if+0x2a1 #7 ipv4_input+0x48 sys/netinet/ip_input.c:242 #8 if_input_local+0x10e sys/net/if.c:774 #9 ip_output+0xb05 ip_mloopback sys/netinet/ip_output.c:1791 [inline] #9 ip_output+0xb05 sys/netinet/ip_output.c:332 #10 udp_output+0x58d sys/netinet/udp_usrreq.c:1011 #11 sosend+0x632 sys/kern/uipc_socket.c:582 #12 dofilewritev+0x19c sys/kern/sys_generic.c:381 #13 sys_write+0x83 sys/kern/sys_generic.c:301 #14 syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline] #14 syscall+0x489 sys/arch/amd64/amd64/trap.c:585 #15 Xsyscall+0x128 ddb{0}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10191 6613K 7386K 78643K 11619 0 pcb 13 8K 8K 78643K 13 0 rtable 240 6K 7K 78643K 354 0 ifaddr 91 18K 18K 78643K 116 0 counters 58 35K 35K 78643K 66 0 ioctlops 0 0K 4K 78643K 1487 0 iov 0 0K 0K 78643K 19 0 mount 1 1K 1K 78643K 1 0 log 0 0K 0K 78643K 5 0 vnodes 1277 80K 80K 78643K 1376 0 UFS quota 1 32K 32K 78643K 1 0 UFS mount 5 36K 36K 78643K 5 0 shm 2 1K 33K 78643K 30 0 VM map 2 1K 1K 78643K 2 0 sem 12 0K 0K 78643K 43 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1697 195K 286K 78643K 12548 0 file desc 17 61K 89K 78643K 390 0 proc 69 87K 111K 78643K 508 0 subproc 104 6K 6K 78643K 104 0 NFS srvsock 1 0K 0K 78643K 1 0 NFS daemon 1 16K 16K 78643K 1 0 in_multi 99 6K 6K 78643K 99 0 ether_multi 1 0K 0K 78643K 1 0 ISOFS mount 1 32K 32K 78643K 1 0 MSDOSFS mount 1 16K 16K 78643K 1 0 ttys 43 201K 201K 78643K 43 0 exec 0 0K 2K 78643K 644 0 tdb 3 0K 0K 78643K 3 0 pagedep 1 8K 8K 78643K 1 0 inodedep 1 32K 32K 78643K 1 0 newblk 1 0K 0K 78643K 1 0 VM swap 7 26K 26K 78643K 7 0 UVM amap 285 76K 76K 78643K 6253 0 UVM aobj 31 2K 2K 78643K 31 0 memdesc 1 4K 4K 78643K 1 0 crypto data 1 1K 1K 78643K 1 0 ip6_options 0 0K 0K 78643K 10 0 NDP 13 0K 2K 78643K 33 0 temp 94 4697K 4761K 78643K 4981 0 kqueue 12 18K 18K 78643K 22 0 SYN cache 2 16K 16K 78643K 2 0 ddb{0}> show all pools Name Size Requests Fail Releases Pgreq Pgrel Npage Hiwat Minpg Maxpg Idle plcache 128 22 0 0 1 0 1 1 0 8 0 rtpcb 120 33 0 30 1 0 1 1 0 8 0 rtentry 112 112 0 1 4 0 4 4 0 8 0 unpcb 136 123 0 108 1 0 1 1 0 8 0 syncache 296 4 0 4 1 1 0 1 0 8 0 tcpcb 736 116 0 99 7 0 7 7 0 8 5 arp 120 19 0 0 1 0 1 1 0 8 0 inpcb 312 350 0 339 4 0 4 4 0 8 3 nd6 48 24 0 0 1 0 1 1 0 8 0 kcovpl 48 8 0 0 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 49 0 0 1 0 1 1 0 8 0 pfstkey 112 49 0 0 2 0 2 2 0 8 0 pfstate 320 49 0 0 5 0 5 5 0 8 0 pfrule 1360 21 0 16 2 1 1 2 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 454 0 0 29 0 29 29 0 8 0 art_table 32 455 0 0 4 0 4 4 0 8 0 art_node 16 111 0 10 1 0 1 1 0 8 0 semapl 112 41 0 31 1 0 1 1 0 8 0 shmpl 112 28 0 0 1 0 1 1 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 1806 0 370 91 0 91 91 0 8 1 ffsino 272 1806 0 370 97 0 97 97 0 8 1 nchpl 144 2357 0 686 63 0 63 63 0 8 0 uvmvnodes 80 2003 0 0 41 0 41 41 0 8 0 vnodes 224 2003 0 0 118 0 118 118 0 8 0 namei 1024 7491 0 7491 2 1 1 2 0 8 1 percpumem 16 45 0 4 1 0 1 1 0 8 0 scxspl 216 7084 0 7084 2 1 1 2 0 8 1 plimitpl 152 36 0 21 1 0 1 1 0 8 0 sigapl 424 693 0 648 6 0 6 6 0 8 0 futexpl 64 2501 0 2498 1 0 1 1 0 8 0 knotepl 120 102 0 0 4 0 4 4 0 8 0 kqueuepl 216 37 0 29 1 0 1 1 0 8 0 pipepl 336 129 0 101 3 0 3 3 0 8 0 fdescpl 496 679 0 649 5 0 5 5 0 8 1 filepl 152 2578 0 2334 11 0 11 11 0 8 1 lockfpl 104 82 0 80 1 0 1 1 0 8 0 lockfspl 48 42 0 40 1 0 1 1 0 8 0 sessionpl 144 24 0 7 1 0 1 1 0 8 0 pgrppl 48 24 0 7 1 0 1 1 0 8 0 ucredpl 96 186 0 174 1 0 1 1 0 8 0 zombiepl 144 650 0 648 1 0 1 1 0 8 0 processpl 1064 693 0 648 4 0 4 4 0 8 0 procpl 672 1007 0 949 7 0 7 7 0 8 2 sockpl 480 525 0 496 8 0 8 8 0 8 4 mcl64k 65536 4 0 0 1 0 1 1 0 8 0 mcl12k 12288 1 0 0 1 0 1 1 0 8 0 mcl8k 8192 12 0 0 2 0 2 2 0 8 0 mcl4k 4096 3 0 0 1 0 1 1 0 8 0 mcl2k 2048 120 0 0 14 0 14 14 0 8 0 mtagpl 96 76 0 0 2 0 2 2 0 8 0 mbufpl 256 351 0 0 22 0 22 22 0 8 0 bufpl 288 3935 0 146 271 0 271 271 0 8 0 anonpl 24 127363 0 119123 58 3 55 55 0 186 0 amapchunkpl 152 13672 0 13039 28 0 28 28 0 158 2 amappl16 200 809 0 676 9 1 8 8 0 8 0 amappl15 192 96 0 90 1 0 1 1 0 8 0 amappl14 184 33 0 29 1 0 1 1 0 8 0 amappl13 176 82 0 80 1 0 1 1 0 8 0 amappl12 168 84 0 77 1 0 1 1 0 8 0 amappl11 160 133 0 115 1 0 1 1 0 8 0 amappl10 152 31 0 26 1 0 1 1 0 8 0 amappl9 144 489 0 482 1 0 1 1 0 8 0 amappl8 136 661 0 614 2 0 2 2 0 8 0 amappl7 128 186 0 171 1 0 1 1 0 8 0 amappl6 120 290 0 266 2 1 1 2 0 8 0 amappl5 112 517 0 498 1 0 1 1 0 8 0 amappl4 104 944 0 916 2 1 1 2 0 8 0 amappl3 96 216 0 201 1 0 1 1 0 8 0 amappl2 88 610 0 565 3 1 2 3 0 8 0 amappl1 80 15158 0 14561 19 5 14 19 0 8 0 amappl 88 5791 0 5561 6 0 6 6 0 92 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 30 0 0 1 0 1 1 0 8 0 uaddrrnd 24 679 0 649 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 679 0 649 1 0 1 1 0 8 0 vmmpekpl 168 9160 0 9120 3 0 3 3 0 8 0 vmmpepl 168 61722 0 59611 99 0 99 99 0 357 5 vmsppl 368 678 0 649 4 0 4 4 0 8 1 rwobjpl 56 17818 0 14694 45 0 45 45 0 8 0 pdppl 4096 1365 0 1298 101 32 69 81 0 8 2 pvpl 32 363559 0 350880 263 4 259 262 0 265 155 pmappl 248 678 0 649 3 0 3 3 0 8 1 extentpl 40 58 0 38 1 0 1 1 0 8 0 phpool 112 658 0 36 18 0 18 18 0 8 0 ddb{0}> machine ddbcpu 0 Invalid cpu 0 ddb{0}> trace db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:440 panic(ffffffff825a56b6) at panic+0x177 sys/kern/subr_prf.c:202 witness_checkorder(ffffffff82b47030,9,0) at witness_checkorder+0x116d sys/kern/subr_witness.c:833 __mp_lock(ffffffff82b46e28) at __mp_lock+0xa1 read_rflags machine/cpufunc.h:195 [inline] __mp_lock(ffffffff82b46e28) at __mp_lock+0xa1 intr_disable machine/cpufunc.h:216 [inline] __mp_lock(ffffffff82b46e28) at __mp_lock+0xa1 sys/kern/kern_lock.c:142 selwakeup(fffffd8077c23310) at selwakeup+0x16 klist_empty sys/sys/event.h:361 [inline] selwakeup(fffffd8077c23310) at selwakeup+0x16 sys/kern/sys_generic.c:885 sorwakeup(fffffd8077c231f8) at sorwakeup+0xc9 sys/kern/uipc_socket.c:1699 udp_sbappend(fffffd806f684270,fffffd8067c2c200,fffffd80671aa5b0,0,14,fffffd80671aa5c4,67cfad0090c80da1,0) at udp_sbappend+0x3b1 sys/netinet/udp_usrreq.c:638 udp_input(ffff80002b12dd68,ffff80002b12dd74,11,2) at udp_input+0xbcb sys/netinet/udp_usrreq.c:427 ip_deliver(ffff80002b12dd68,ffff80002b12dd74,11,2) at ip_deliver+0x322 sys/netinet/ip_input.c:657 ip_ours(ffff80002b12dd68,ffff80002b12dd74,ffff8000246bb000,0) at ip_ours+0x3ba sys/netinet/ip_input.c:616 ip_input_if(ffff80002b12dd68,ffff80002b12dd74,4,0,ffff800000689000) at ip_input_if+0x2a1 ipv4_input(ffff800000689000,fffffd80671aa500) at ipv4_input+0x48 sys/netinet/ip_input.c:242 if_input_local(ffff800000689000,fffffd80671aa500,2) at if_input_local+0x10e sys/net/if.c:774 ip_output(fffffd80671aa600,0,fffffd806f684de0,0,0,fffffd806f684d68,e208c024ee8180e7) at ip_output+0xb05 ip_mloopback sys/netinet/ip_output.c:1791 [inline] ip_output(fffffd80671aa600,0,fffffd806f684de0,0,0,fffffd806f684d68,e208c024ee8180e7) at ip_output+0xb05 sys/netinet/ip_output.c:332 udp_output(fffffd806f684d68,fffffd80671aa600,0,0) at udp_output+0x58d sys/netinet/udp_usrreq.c:1011 sosend(fffffd8077c23d38,0,ffff80002b12e178,0,0,0) at sosend+0x632 sys/kern/uipc_socket.c:582 dofilewritev(ffff8000260dc2a8,4,ffff80002b12e178,0,ffff80002b12e270) at dofilewritev+0x19c sys/kern/sys_generic.c:381 sys_write(ffff8000260dc2a8,ffff80002b12e218,ffff80002b12e270) at sys_write+0x83 sys/kern/sys_generic.c:301 syscall(ffff80002b12e2e0) at syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff80002b12e2e0) at syscall+0x489 sys/arch/amd64/amd64/trap.c:585 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x492fa06bc70, count: -20 ddb{0}> machine ddbcpu 1 Stopped at x86_ipi_db+0x1a: addq $0x8,%rsp x86_ipi_db(ffff800020ce8ff0) at x86_ipi_db+0x1a sys/arch/amd64/amd64/db_interface.c:393 x86_ipi_handler() at x86_ipi_handler+0xb7 sys/arch/amd64/amd64/ipi.c:106 Xresume_lapic_ipi() at Xresume_lapic_ipi+0x23 end of kernel end trace frame: 0x7f7ffffe78e0, count: 12 ddb{1}> trace x86_ipi_db(ffff800020ce8ff0) at x86_ipi_db+0x1a sys/arch/amd64/amd64/db_interface.c:393 x86_ipi_handler() at x86_ipi_handler+0xb7 sys/arch/amd64/amd64/ipi.c:106 Xresume_lapic_ipi() at Xresume_lapic_ipi+0x23 end of kernel end trace frame: 0x7f7ffffe78e0, count: -3