panic: receive 3: so 0xfffffd806863c4b0, so_type 3, m 0xfffffd805a923500, m_type 0 Stopped at db_enter+0x18: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND *415057 49340 0 0 0 0 dhclient db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:398 panic(ffffffff821ba7ea) at panic+0x15c sys/kern/subr_prf.c:207 soreceive(fffffd806863c4b0,0,ffff80001d772478,0,0,ffff80001d772384) at soreceive+0x16e7 soo_read(fffffd80687f35a0,ffff80001d772478,0) at soo_read+0x53 sys/kern/sys_socket.c:70 dofilereadv(ffff80001d7394e8,6,ffff80001d772478,0,ffff80001d772560) at dofilereadv+0x1a1 sys/kern/sys_generic.c:237 sys_read(ffff80001d7394e8,ffff80001d772510,ffff80001d772560) at sys_read+0x83 sys/kern/sys_generic.c:157 syscall(ffff80001d7725e0) at syscall+0x507 sys/arch/amd64/amd64/trap.c:570 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f7ffffdd110, count: 7 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> ddb> set $lines = 0 ddb> set $maxwidth = 0 ddb> show panic receive 3: so 0xfffffd806863c4b0, so_type 3, m 0xfffffd805a923500, m_type 0 ddb> trace db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:398 panic(ffffffff821ba7ea) at panic+0x15c sys/kern/subr_prf.c:207 soreceive(fffffd806863c4b0,0,ffff80001d772478,0,0,ffff80001d772384) at soreceive+0x16e7 soo_read(fffffd80687f35a0,ffff80001d772478,0) at soo_read+0x53 sys/kern/sys_socket.c:70 dofilereadv(ffff80001d7394e8,6,ffff80001d772478,0,ffff80001d772560) at dofilereadv+0x1a1 sys/kern/sys_generic.c:237 sys_read(ffff80001d7394e8,ffff80001d772510,ffff80001d772560) at sys_read+0x83 sys/kern/sys_generic.c:157 syscall(ffff80001d7725e0) at syscall+0x507 sys/arch/amd64/amd64/trap.c:570 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f7ffffdd110, count: -8 ddb> show registers rdi 0 rsi 0x1 rbp 0xffff80001d7721c0 rbx 0xffff80001d772270 rdx 0x2 rcx 0x1 rax 0x1 r8 0xffff80001d772180 r9 0x1 r10 0x9b07c919a5801dee r11 0x4e2ba8a3c75da889 r12 0x3000000008 r13 0xffff80001d7721d0 r14 0x100 r15 0x1 rip 0xffffffff817fd778 db_enter+0x18 cs 0x8 rflags 0x246 rsp 0xffff80001d7721b0 ss 0x10 db_enter+0x18: addq $0x8,%rsp ddb> show proc PROC (dhclient) pid=415057 stat=onproc flags process=0 proc=0 pri=24, usrpri=50, nice=20 forw=0xffffffffffffffff, list=0xffff80001d73a118,0xffff80001d739768 process=0xffff8000ffffa740 user=0xffff80001d76d000, vmspace=0xfffffd806bc09110 estcpu=0, cpticks=0, pctcpu=0.0 user=0, sys=0, intr=0 ddb> ps PID TID PPID UID S FLAGS WAIT COMMAND 65900 428287 40515 0 3 0x82 wait syz-execprog 65900 519394 40515 0 3 0x4000082 thrsleep syz-execprog 65900 262819 40515 0 3 0x4000082 thrsleep syz-execprog 65900 523455 40515 0 3 0x4000082 thrsleep syz-execprog 65900 27081 40515 0 3 0x4000082 thrsleep syz-execprog 65900 460504 40515 0 3 0x4000082 kqread syz-execprog 65900 350346 40515 0 3 0x4000082 thrsleep syz-execprog 65900 330542 40515 0 3 0x4000082 thrsleep syz-execprog 40515 78070 62793 0 3 0x10008a pause ksh 62793 435767 18564 0 3 0x92 select sshd 99463 369751 1 0 3 0x100083 ttyin getty 18564 521453 1 0 3 0x80 select sshd 16243 109067 21730 73 3 0x100090 kqread syslogd 21730 426155 1 0 3 0x100082 netio syslogd 78484 504417 1 77 2 0x100010 dhclient *49340 415057 1 0 7 0 dhclient 12103 282682 0 0 3 0x14200 bored smr 5998 269574 0 0 3 0x14200 pgzero zerothread 86706 48711 0 0 3 0x14200 aiodoned aiodoned 82845 190236 0 0 3 0x14200 syncer update 61651 91134 0 0 3 0x14200 cleaner cleaner 32307 53362 0 0 3 0x14200 reaper reaper 51288 20906 0 0 3 0x14200 pgdaemon pagedaemon 16058 501438 0 0 3 0x14200 bored crynlk 65821 121659 0 0 3 0x14200 bored crypto 31656 29641 0 0 3 0x40014200 acpi0 acpi0 20442 134143 0 0 2 0x14200 softnet 58145 265676 0 0 2 0x14200 systqmp 54983 228716 0 0 3 0x14200 bored systq 56444 360406 0 0 3 0x40014200 bored softclock 80816 439694 0 0 3 0x40014200 idle0 1 55134 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb> show all locks No such command ddb> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 9441 6321K 6321K 78643K 10540 0 pcb 13 8K 8K 78643K 13 0 rtable 61 1K 2K 78643K 155 0 ifaddr 24 7K 9K 78643K 33 0 counters 19 16K 16K 78643K 20 0 ioctlops 0 0K 2K 78643K 14 0 mount 1 1K 1K 78643K 1 0 vnodes 1182 74K 74K 78643K 1187 0 UFS quota 1 32K 32K 78643K 1 0 UFS mount 5 36K 36K 78643K 5 0 shm 2 1K 1K 78643K 2 0 VM map 2 0K 0K 78643K 2 0 sem 2 0K 0K 78643K 2 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1794 195K 288K 78643K 12646 0 file desc 2 4K 12K 78643K 18 0 proc 47 38K 54K 78643K 318 0 NFS srvsock 1 0K 0K 78643K 1 0 NFS daemon 1 16K 16K 78643K 1 0 in_multi 11 0K 1K 78643K 22 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 19 95K 95K 78643K 19 0 exec 0 0K 1K 78643K 171 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 67 11K 12K 78643K 836 0 UVM aobj 2 2K 2K 78643K 2 0 memdesc 1 4K 4K 78643K 1 0 crypto data 1 1K 1K 78643K 1 0 NDP 3 0K 0K 78643K 6 0 temp 18 3029K 3093K 78643K 1622 0 kqueue 3 4K 4K 78643K 3 0 SYN cache 2 16K 16K 78643K 2 0 ddb> show all pools Name Size Requests Fail Releases Pgreq Pgrel Npage Hiwat Minpg Maxpg Idle arp 64 4 0 2 1 0 1 1 0 8 0 rtpcb 80 17 0 15 1 0 1 1 0 8 0 rtentry 112 34 0 12 1 0 1 1 0 8 0 unpcb 120 27 0 19 1 0 1 1 0 8 0 syncache 264 5 0 5 1 0 1 1 0 8 1 tcpcb 544 8 0 5 1 0 1 1 0 8 0 inpcb 280 27 0 21 1 0 1 1 0 8 0 nd6 48 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 256 144 0 0 9 0 9 9 0 8 0 art_table 32 145 0 0 2 0 2 2 0 8 0 art_node 16 33 0 3 1 0 1 1 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 1415 0 22 88 0 88 88 0 8 0 ffsino 240 1415 0 22 82 0 82 82 0 8 0 nchpl 144 1631 0 39 60 0 60 60 0 8 1 uvmvnodes 72 1424 0 0 26 0 26 26 0 8 0 vnodes 208 1424 0 0 75 0 75 75 0 8 0 namei 1024 3915 0 3915 1 0 1 1 0 8 1 scxspl 192 3671 0 3671 1 0 1 1 0 8 1 plimitpl 152 14 0 8 1 0 1 1 0 8 0 sigapl 424 212 0 186 4 0 4 4 0 8 0 knotepl 112 47 0 38 1 0 1 1 0 8 0 kqueuepl 144 2 0 0 1 0 1 1 0 8 0 pipelkpl 16 70 0 64 1 0 1 1 0 8 0 pipepl 120 140 0 129 1 0 1 1 0 8 0 fdescpl 432 198 0 186 2 0 2 2 0 8 0 filepl 120 973 0 922 2 0 2 2 0 8 0 lockfpl 104 5 0 4 1 0 1 1 0 8 0 lockfspl 48 3 0 2 1 0 1 1 0 8 0 sessionpl 112 18 0 9 1 0 1 1 0 8 0 pgrppl 48 18 0 9 1 0 1 1 0 8 0 ucredpl 96 57 0 50 1 0 1 1 0 8 0 zombiepl 144 187 0 186 1 0 1 1 0 8 0 processpl 920 212 0 186 4 0 4 4 0 8 0 procpl 624 219 0 186 3 0 3 3 0 8 0 sockpl 400 71 0 55 2 0 2 2 0 8 0 mcl4k 4096 10 0 10 1 0 1 1 0 8 1 mcl2k 2048 5470 0 5442 6 2 4 6 0 8 0 mtagpl 80 2 0 2 1 1 0 1 0 8 0 mbufpl 256 9598 0 9521 8 1 7 7 0 8 0 bufpl 280 2890 0 125 198 0 198 198 0 8 0 anonpl 16 20222 0 18754 13 2 11 11 0 107 3 amapchunkpl 152 808 0 749 4 0 4 4 0 158 0 amappl16 192 129 0 101 2 0 2 2 0 8 0 amappl15 184 1 0 0 1 0 1 1 0 8 0 amappl14 176 27 0 22 1 0 1 1 0 8 0 amappl13 168 19 0 18 1 0 1 1 0 8 0 amappl12 160 9 0 5 1 0 1 1 0 8 0 amappl11 152 44 0 35 1 0 1 1 0 8 0 amappl10 144 12 0 9 1 0 1 1 0 8 0 amappl9 136 202 0 200 1 0 1 1 0 8 0 amappl8 128 241 0 234 1 0 1 1 0 8 0 amappl7 120 102 0 91 1 0 1 1 0 8 0 amappl6 112 29 0 26 1 0 1 1 0 8 0 amappl5 104 168 0 158 1 0 1 1 0 8 0 amappl4 96 424 0 402 1 0 1 1 0 8 0 amappl3 88 109 0 103 1 0 1 1 0 8 0 amappl2 80 804 0 748 2 0 2 2 0 8 0 amappl1 72 13622 0 13230 23 6 17 17 0 8 8 amappl 80 418 0 393 1 0 1 1 0 84 0 dma4096 4096 1 0 1 1 1 0 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 64 1 0 0 1 0 1 1 0 8 0 uaddrrnd 24 198 0 186 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 198 0 186 1 0 1 1 0 8 0 vmmpekpl 168 6150 0 6131 1 0 1 1 0 8 0 vmmpepl 168 29134 0 28294 75 6 69 69 0 357 30 vmsppl 272 197 0 186 1 0 1 1 0 8 0 pdppl 4096 402 0 372 5 0 5 5 0 8 0 pvpl 32 104706 0 101008 102 0 102 102 0 265 70 pmappl 200 197 0 186 1 0 1 1 0 8 0 extentpl 40 46 0 29 1 0 1 1 0 8 0 phpool 112 213 0 5 6 0 6 6 0 8 0 ddb> machine ddbcpu 0 No such command ddb> trace db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:398 panic(ffffffff821ba7ea) at panic+0x15c sys/kern/subr_prf.c:207 soreceive(fffffd806863c4b0,0,ffff80001d772478,0,0,ffff80001d772384) at soreceive+0x16e7 soo_read(fffffd80687f35a0,ffff80001d772478,0) at soo_read+0x53 sys/kern/sys_socket.c:70 dofilereadv(ffff80001d7394e8,6,ffff80001d772478,0,ffff80001d772560) at dofilereadv+0x1a1 sys/kern/sys_generic.c:237 sys_read(ffff80001d7394e8,ffff80001d772510,ffff80001d772560) at sys_read+0x83 sys/kern/sys_generic.c:157 syscall(ffff80001d7725e0) at syscall+0x507 sys/arch/amd64/amd64/trap.c:570 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f7ffffdd110, count: -8 ddb> machine ddbcpu 1 No such command ddb> trace db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:398 panic(ffffffff821ba7ea) at panic+0x15c sys/kern/subr_prf.c:207 soreceive(fffffd806863c4b0,0,ffff80001d772478,0,0,ffff80001d772384) at soreceive+0x16e7 soo_read(fffffd80687f35a0,ffff80001d772478,0) at soo_read+0x53 sys/kern/sys_socket.c:70 dofilereadv(ffff80001d7394e8,6,ffff80001d772478,0,ffff80001d772560) at dofilereadv+0x1a1 sys/kern/sys_generic.c:237 sys_read(ffff80001d7394e8,ffff80001d772510,ffff80001d772560) at sys_read+0x83 sys/kern/sys_generic.c:157 syscall(ffff80001d7725e0) at syscall+0x507 sys/arch/amd64/amd64/trap.c:570 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f7ffffdd110, count: -8 ddb>