login: 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 281652 52564 32767 0x10 0 1 syz-executor.0 * 74075 52564 32767 0x10 0x4000000 0 syz-executor.0 db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:440 panic(ffffffff8259e057) at panic+0x177 sys/kern/subr_prf.c:202 witness_checkorder(ffffffff82a712b0,9,0) at witness_checkorder+0x116d sys/kern/subr_witness.c:833 __mp_lock(ffffffff82a710a8) at __mp_lock+0xa1 read_rflags machine/cpufunc.h:195 [inline] __mp_lock(ffffffff82a710a8) at __mp_lock+0xa1 intr_disable machine/cpufunc.h:216 [inline] __mp_lock(ffffffff82a710a8) at __mp_lock+0xa1 sys/kern/kern_lock.c:142 selwakeup(fffffd806a95e318) at selwakeup+0x16 klist_empty sys/sys/event.h:361 [inline] selwakeup(fffffd806a95e318) at selwakeup+0x16 sys/kern/sys_generic.c:885 sorwakeup(fffffd806a95e200) at sorwakeup+0xc9 sys/kern/uipc_socket.c:1699 udp_sbappend(fffffd806c7ad758,fffffd8068770800,fffffd805e22e5b0,0,14,fffffd805e22e5c4,3c39568e343ddffd,0) at udp_sbappend+0x3b1 sys/netinet/udp_usrreq.c:638 udp_input(ffff8000278fc9f8,ffff8000278fca04,11,2) at udp_input+0xbcb sys/netinet/udp_usrreq.c:427 ip_deliver(ffff8000278fc9f8,ffff8000278fca04,11,2) at ip_deliver+0x322 sys/netinet/ip_input.c:657 ip_ours(ffff8000278fc9f8,ffff8000278fca04,ffff80002c951000,0) at ip_ours+0x3ba sys/netinet/ip_input.c:616 ip_input_if(ffff8000278fc9f8,ffff8000278fca04,4,0,ffff800000689000) at ip_input_if+0x2a1 ipv4_input(ffff800000689000,fffffd805e22e500) at ipv4_input+0x48 sys/netinet/ip_input.c:242 if_input_local(ffff800000689000,fffffd805e22e500,2) at if_input_local+0x10e sys/net/if.c:774 ip_output(fffffd80794a1100,0,fffffd806c7ad2f0,0,0,fffffd806c7ad278,67d4e5c9361c6903) at ip_output+0xb05 ip_mloopback sys/netinet/ip_output.c:1791 [inline] ip_output(fffffd80794a1100,0,fffffd806c7ad2f0,0,0,fffffd806c7ad278,67d4e5c9361c6903) at ip_output+0xb05 sys/netinet/ip_output.c:332 end trace frame: 0xffff8000278fcc70, 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(ffffffff8259e057) at panic+0x177 sys/kern/subr_prf.c:202 witness_checkorder(ffffffff82a712b0,9,0) at witness_checkorder+0x116d sys/kern/subr_witness.c:833 __mp_lock(ffffffff82a710a8) at __mp_lock+0xa1 read_rflags machine/cpufunc.h:195 [inline] __mp_lock(ffffffff82a710a8) at __mp_lock+0xa1 intr_disable machine/cpufunc.h:216 [inline] __mp_lock(ffffffff82a710a8) at __mp_lock+0xa1 sys/kern/kern_lock.c:142 selwakeup(fffffd806a95e318) at selwakeup+0x16 klist_empty sys/sys/event.h:361 [inline] selwakeup(fffffd806a95e318) at selwakeup+0x16 sys/kern/sys_generic.c:885 sorwakeup(fffffd806a95e200) at sorwakeup+0xc9 sys/kern/uipc_socket.c:1699 udp_sbappend(fffffd806c7ad758,fffffd8068770800,fffffd805e22e5b0,0,14,fffffd805e22e5c4,3c39568e343ddffd,0) at udp_sbappend+0x3b1 sys/netinet/udp_usrreq.c:638 udp_input(ffff8000278fc9f8,ffff8000278fca04,11,2) at udp_input+0xbcb sys/netinet/udp_usrreq.c:427 ip_deliver(ffff8000278fc9f8,ffff8000278fca04,11,2) at ip_deliver+0x322 sys/netinet/ip_input.c:657 ip_ours(ffff8000278fc9f8,ffff8000278fca04,ffff80002c951000,0) at ip_ours+0x3ba sys/netinet/ip_input.c:616 ip_input_if(ffff8000278fc9f8,ffff8000278fca04,4,0,ffff800000689000) at ip_input_if+0x2a1 ipv4_input(ffff800000689000,fffffd805e22e500) at ipv4_input+0x48 sys/netinet/ip_input.c:242 if_input_local(ffff800000689000,fffffd805e22e500,2) at if_input_local+0x10e sys/net/if.c:774 ip_output(fffffd80794a1100,0,fffffd806c7ad2f0,0,0,fffffd806c7ad278,67d4e5c9361c6903) at ip_output+0xb05 ip_mloopback sys/netinet/ip_output.c:1791 [inline] ip_output(fffffd80794a1100,0,fffffd806c7ad2f0,0,0,fffffd806c7ad278,67d4e5c9361c6903) at ip_output+0xb05 sys/netinet/ip_output.c:332 udp_output(fffffd806c7ad278,fffffd80794a1100,0,0) at udp_output+0x58d sys/netinet/udp_usrreq.c:1011 sosend(fffffd806a95e3e0,0,ffff8000278fce08,0,0,0) at sosend+0x632 sys/kern/uipc_socket.c:582 dofilewritev(ffff80002120cd20,4,ffff8000278fce08,0,ffff8000278fcf00) at dofilewritev+0x19c sys/kern/sys_generic.c:381 sys_write(ffff80002120cd20,ffff8000278fcea8,ffff8000278fcf00) at sys_write+0x83 sys/kern/sys_generic.c:301 syscall(ffff8000278fcf70) at syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff8000278fcf70) at syscall+0x489 sys/arch/amd64/amd64/trap.c:585 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x89e06383880, count: -20 ddb{0}> show registers rdi 0 rsi 0x1 rbp 0xffff8000278fc430 rbx 0xffffffff8290cbff cpu_info_full_primary+0x2bff rdx 0xffff800000bca640 rcx 0 rax 0xffff80002120cd20 r8 0x101010101010101 r9 0x8080808080808080 r10 0x14700776d0441655 r11 0x582941fb389a755a r12 0xffffffff8290ca00 cpu_info_full_primary+0x2a00 r13 0 r14 0 r15 0x1 rip 0xffffffff81faa128 db_enter+0x18 cs 0x8 rflags 0x246 rsp 0xffff8000278fc420 ss 0x10 db_enter+0x18: addq $0x8,%rsp ddb{0}> show proc PROC (syz-executor.0) pid=74075 stat=onproc flags process=10 proc=4000000 pri=32, usrpri=55, nice=20 forw=0xffffffffffffffff, list=0xffff80002120c540,0xffffffff82a80ad8 process=0xffff8000ffff1910 user=0xffff8000278f8000, vmspace=0xfffffd8069fd4b90 estcpu=36, cpticks=2, pctcpu=0.0 user=0, sys=1, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND 52564 281652 6978 32767 7 0x10 syz-executor.0 *52564 74075 6978 32767 7 0x4000010 syz-executor.0 6978 297523 38414 32767 3 0x90 nanoslp syz-executor.0 38414 477717 38151 0 3 0x82 wait syz-executor.0 74434 309863 84823 32767 3 0x90 piperd syz-executor.6 3797 257327 42790 32767 3 0x90 piperd syz-executor.4 84823 311643 38151 0 3 0x82 wait syz-executor.6 42790 474228 38151 0 3 0x82 wait syz-executor.4 75272 484707 0 0 3 0x14200 bored sosplice 27797 336065 96390 32767 3 0x90 piperd syz-executor.1 94829 48219 4834 32767 3 0x90 piperd syz-executor.7 4286 45586 25537 32767 3 0x90 piperd syz-executor.5 6382 365155 47515 32767 3 0x90 piperd syz-executor.3 4834 234639 38151 0 3 0x82 wait syz-executor.7 25537 103204 38151 0 3 0x82 wait syz-executor.5 47515 504240 38151 0 3 0x82 wait syz-executor.3 86055 484583 68016 32767 3 0x90 nanoslp syz-executor.2 68016 185619 38151 0 3 0x82 wait syz-executor.2 96390 123723 38151 0 3 0x82 wait syz-executor.1 38151 61792 35483 0 3 0x82 thrsleep syz-fuzzer 38151 238358 35483 0 3 0x4000082 thrsleep syz-fuzzer 38151 314455 35483 0 3 0x4000082 thrsleep syz-fuzzer 38151 75794 35483 0 3 0x4000082 thrsleep syz-fuzzer 38151 153817 35483 0 3 0x4000082 thrsleep syz-fuzzer 38151 30820 35483 0 3 0x4000082 thrsleep syz-fuzzer 38151 336503 35483 0 3 0x4000082 kqread syz-fuzzer 38151 339658 35483 0 3 0x4000082 thrsleep syz-fuzzer 38151 350218 35483 0 3 0x4000082 thrsleep syz-fuzzer 35483 418654 43754 0 3 0x10008a sigsusp ksh 43754 371936 35210 0 3 0x9a kqread sshd 38427 440734 1 0 3 0x100083 ttyin getty 35210 298181 1 0 3 0x88 kqread sshd 1602 500522 26241 73 3 0x1100090 kqread syslogd 26241 381542 1 0 3 0x100082 netio syslogd 77995 474384 1 0 3 0x100080 kqread resolvd 47289 298295 38658 77 3 0x100092 kqread dhcpleased 50908 369071 38658 77 3 0x100092 kqread dhcpleased 38658 157308 1 0 3 0x80 kqread dhcpleased 77652 361273 0 0 3 0x14200 bored smr 39177 386757 0 0 3 0x14200 pgzero zerothread 48175 278822 0 0 3 0x14200 aiodoned aiodoned 56116 164155 0 0 3 0x14200 syncer update 59791 436069 0 0 3 0x14200 cleaner cleaner 38238 13629 0 0 3 0x14200 reaper reaper 34834 493582 0 0 3 0x14200 pgdaemon pagedaemon 52082 286077 0 0 3 0x14200 bored viomb 16432 340503 0 0 3 0x40014200 acpi0 acpi0 18997 299846 0 0 3 0x40014200 idle1 96673 158082 0 0 3 0x14200 bored softnet 64790 474897 0 0 3 0x14200 bored systqmp 3057 393707 0 0 3 0x14200 bored systq 12123 252582 0 0 3 0x40014200 bored softclock 25776 250068 0 0 3 0x40014200 idle0 1 248014 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 (0xffffffff82a7d788) #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 52564 (syz-executor.0) thread 0xffff80002120cd20 (74075) exclusive rwlock netlock r = 0 (0xffffffff829a2bd0) #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 (0xffffffff82a7d788) #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 10175 6407K 6419K 78643K 11283 0 pcb 13 8K 8K 78643K 13 0 rtable 238 6K 7K 78643K 528 0 ifaddr 81 17K 17K 78643K 125 0 counters 56 35K 35K 78643K 68 0 ioctlops 0 0K 2K 78643K 39 0 iov 0 0K 2K 78643K 7 0 mount 1 1K 1K 78643K 1 0 log 0 0K 0K 78643K 5 0 vnodes 1270 79K 79K 78643K 1361 0 UFS quota 1 32K 32K 78643K 1 0 UFS mount 5 36K 36K 78643K 5 0 shm 2 1K 5K 78643K 6 0 VM map 2 1K 1K 78643K 2 0 sem 12 0K 0K 78643K 18 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1697 195K 286K 78643K 12548 0 file desc 20 73K 125K 78643K 480 0 proc 56 74K 111K 78643K 661 0 subproc 104 6K 6K 78643K 182 0 NFS srvsock 1 0K 0K 78643K 1 0 NFS daemon 1 16K 16K 78643K 1 0 ip_moptions 0 0K 0K 78643K 75 0 in_multi 99 6K 6K 78643K 165 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 67 307K 307K 78643K 67 0 exec 0 0K 2K 78643K 801 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 253 77K 79K 78643K 6457 0 UVM aobj 3 2K 2K 78643K 3 0 memdesc 1 4K 4K 78643K 1 0 crypto data 1 1K 1K 78643K 1 0 ip6_options 0 0K 0K 78643K 29 0 NDP 13 0K 2K 78643K 45 0 temp 85 4701K 4765K 78643K 5480 0 kqueue 12 18K 20K 78643K 34 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 49 0 46 1 0 1 1 0 8 0 rtentry 112 177 0 67 4 0 4 4 0 8 0 unpcb 136 115 0 102 1 0 1 1 0 8 0 syncache 296 29 0 29 2 1 1 1 0 8 1 tcpqe 32 22 0 22 2 1 1 1 0 8 1 tcpcb 736 125 0 115 4 0 4 4 0 8 1 arp 120 30 0 12 1 0 1 1 0 8 0 ipq 40 1 0 0 1 0 1 1 0 8 0 ipqe 40 4 0 3 1 0 1 1 0 8 0 inpcb 312 270 0 255 2 0 2 2 0 8 0 nd6 48 42 0 18 1 0 1 1 0 8 0 kcovpl 48 14 0 6 1 0 1 1 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 719 0 264 29 0 29 29 0 8 0 art_table 32 720 0 264 4 0 4 4 0 8 0 art_node 16 176 0 76 1 0 1 1 0 8 0 semapl 112 16 0 6 1 0 1 1 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 1778 0 350 90 0 90 90 0 8 0 ffsino 272 1778 0 350 96 0 96 96 0 8 0 nchpl 144 2371 0 752 62 0 62 62 0 8 0 uvmvnodes 80 1969 0 0 41 0 41 41 0 8 0 vnodes 224 1969 0 0 116 0 116 116 0 8 0 namei 1024 8045 0 8045 2 1 1 2 0 8 1 percpumem 16 46 0 6 1 0 1 1 0 8 0 scxspl 216 7342 0 7342 9 7 2 8 0 8 2 plimitpl 152 62 0 40 1 0 1 1 0 8 0 sigapl 424 741 0 695 7 1 6 7 0 8 0 futexpl 64 2118 0 2118 1 0 1 1 0 8 1 knotepl 120 108 0 0 4 0 4 4 0 8 0 kqueuepl 216 44 0 36 1 0 1 1 0 8 0 pipepl 336 175 0 147 3 0 3 3 0 8 0 fdescpl 496 726 0 695 7 2 5 6 0 8 0 filepl 152 2517 0 2280 10 0 10 10 0 8 0 lockfpl 104 14 0 12 1 0 1 1 0 8 0 lockfspl 48 8 0 6 1 0 1 1 0 8 0 sessionpl 144 29 0 13 1 0 1 1 0 8 0 pgrppl 48 29 0 13 1 0 1 1 0 8 0 ucredpl 96 244 0 226 1 0 1 1 0 8 0 zombiepl 144 696 0 695 1 0 1 1 0 8 0 processpl 1064 741 0 695 5 1 4 4 0 8 0 procpl 672 1059 0 1004 7 1 6 7 0 8 1 sosppl 168 11 0 11 1 0 1 1 0 8 1 sockpl 480 434 0 403 6 0 6 6 0 8 1 mcl64k 65536 5 0 0 1 0 1 1 0 8 0 mcl16k 16384 4 0 0 1 0 1 1 0 8 0 mcl12k 12288 3 0 0 1 0 1 1 0 8 0 mcl8k 8192 2 0 0 1 0 1 1 0 8 0 mcl4k 4096 9 0 0 2 0 2 2 0 8 0 mcl2k2 2112 1 0 0 1 0 1 1 0 8 0 mcl2k 2048 121 0 0 14 0 14 14 0 8 0 mtagpl 96 3 0 0 1 0 1 1 0 8 0 mbufpl 256 429 0 0 26 0 26 26 0 8 0 bufpl 288 3932 0 147 271 0 271 271 0 8 0 anonpl 24 138333 0 131364 66 4 62 62 0 186 9 amapchunkpl 152 14217 0 13663 30 2 28 29 0 158 4 amappl16 200 1313 0 1185 15 1 14 14 0 8 6 amappl15 192 120 0 111 1 0 1 1 0 8 0 amappl14 184 30 0 24 1 0 1 1 0 8 0 amappl13 176 118 0 116 1 0 1 1 0 8 0 amappl12 168 61 0 57 1 0 1 1 0 8 0 amappl11 160 123 0 112 1 0 1 1 0 8 0 amappl10 152 42 0 39 1 0 1 1 0 8 0 amappl9 144 490 0 486 1 0 1 1 0 8 0 amappl8 136 820 0 775 2 0 2 2 0 8 0 amappl7 128 304 0 287 1 0 1 1 0 8 0 amappl6 120 251 0 225 2 1 1 2 0 8 0 amappl5 112 370 0 351 1 0 1 1 0 8 0 amappl4 104 1045 0 1017 2 0 2 2 0 8 0 amappl3 96 243 0 229 1 0 1 1 0 8 0 amappl2 88 595 0 550 3 1 2 3 0 8 0 amappl1 80 15825 0 15245 18 4 14 18 0 8 0 amappl 88 5965 0 5768 7 1 6 7 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 2 0 0 1 0 1 1 0 8 0 uaddrrnd 24 726 0 695 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 726 0 695 1 0 1 1 0 8 0 vmmpekpl 168 9755 0 9704 3 0 3 3 0 8 0 vmmpepl 168 67534 0 65520 112 0 112 112 0 357 18 vmsppl 368 725 0 695 4 0 4 4 0 8 0 rwobjpl 56 18919 0 15949 44 1 43 43 0 8 0 pdppl 4096 1459 0 1390 125 50 75 95 0 8 6 pvpl 32 390090 0 378437 259 21 238 259 0 265 127 pmappl 248 725 0 695 4 1 3 3 0 8 0 extentpl 40 58 0 38 1 0 1 1 0 8 0 phpool 112 678 0 53 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(ffffffff8259e057) at panic+0x177 sys/kern/subr_prf.c:202 witness_checkorder(ffffffff82a712b0,9,0) at witness_checkorder+0x116d sys/kern/subr_witness.c:833 __mp_lock(ffffffff82a710a8) at __mp_lock+0xa1 read_rflags machine/cpufunc.h:195 [inline] __mp_lock(ffffffff82a710a8) at __mp_lock+0xa1 intr_disable machine/cpufunc.h:216 [inline] __mp_lock(ffffffff82a710a8) at __mp_lock+0xa1 sys/kern/kern_lock.c:142 selwakeup(fffffd806a95e318) at selwakeup+0x16 klist_empty sys/sys/event.h:361 [inline] selwakeup(fffffd806a95e318) at selwakeup+0x16 sys/kern/sys_generic.c:885 sorwakeup(fffffd806a95e200) at sorwakeup+0xc9 sys/kern/uipc_socket.c:1699 udp_sbappend(fffffd806c7ad758,fffffd8068770800,fffffd805e22e5b0,0,14,fffffd805e22e5c4,3c39568e343ddffd,0) at udp_sbappend+0x3b1 sys/netinet/udp_usrreq.c:638 udp_input(ffff8000278fc9f8,ffff8000278fca04,11,2) at udp_input+0xbcb sys/netinet/udp_usrreq.c:427 ip_deliver(ffff8000278fc9f8,ffff8000278fca04,11,2) at ip_deliver+0x322 sys/netinet/ip_input.c:657 ip_ours(ffff8000278fc9f8,ffff8000278fca04,ffff80002c951000,0) at ip_ours+0x3ba sys/netinet/ip_input.c:616 ip_input_if(ffff8000278fc9f8,ffff8000278fca04,4,0,ffff800000689000) at ip_input_if+0x2a1 ipv4_input(ffff800000689000,fffffd805e22e500) at ipv4_input+0x48 sys/netinet/ip_input.c:242 if_input_local(ffff800000689000,fffffd805e22e500,2) at if_input_local+0x10e sys/net/if.c:774 ip_output(fffffd80794a1100,0,fffffd806c7ad2f0,0,0,fffffd806c7ad278,67d4e5c9361c6903) at ip_output+0xb05 ip_mloopback sys/netinet/ip_output.c:1791 [inline] ip_output(fffffd80794a1100,0,fffffd806c7ad2f0,0,0,fffffd806c7ad278,67d4e5c9361c6903) at ip_output+0xb05 sys/netinet/ip_output.c:332 udp_output(fffffd806c7ad278,fffffd80794a1100,0,0) at udp_output+0x58d sys/netinet/udp_usrreq.c:1011 sosend(fffffd806a95e3e0,0,ffff8000278fce08,0,0,0) at sosend+0x632 sys/kern/uipc_socket.c:582 dofilewritev(ffff80002120cd20,4,ffff8000278fce08,0,ffff8000278fcf00) at dofilewritev+0x19c sys/kern/sys_generic.c:381 sys_write(ffff80002120cd20,ffff8000278fcea8,ffff8000278fcf00) at sys_write+0x83 sys/kern/sys_generic.c:301 syscall(ffff8000278fcf70) at syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff8000278fcf70) at syscall+0x489 sys/arch/amd64/amd64/trap.c:585 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x89e06383880, 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: 0x7f7ffffec810, 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: 0x7f7ffffec810, count: -3