panic: receive 3: so 0xfffffd805e558000, so_type 3, m 0xfffffd805a06f500, m_type 0 Stopped at db_enter+0x18: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND *274543 86406 0 0 0 0 dhclient db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:398 panic(ffffffff82191c3e) at panic+0x15c sys/kern/subr_prf.c:207 soreceive(fffffd805e558000,0,ffff80001d382c38,0,0,ffff80001d382b44) at soreceive+0x16e7 soo_read(fffffd80653fb870,ffff80001d382c38,0) at soo_read+0x53 sys/kern/sys_socket.c:70 dofilereadv(ffff80001d349758,6,ffff80001d382c38,0,ffff80001d382d20) at dofilereadv+0x1a1 sys/kern/sys_generic.c:236 sys_read(ffff80001d349758,ffff80001d382cd0,ffff80001d382d20) at sys_read+0x83 sys/kern/sys_generic.c:156 syscall(ffff80001d382da0) at syscall+0x507 sys/arch/amd64/amd64/trap.c:570 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f7ffffe6ee0, 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 0xfffffd805e558000, so_type 3, m 0xfffffd805a06f500, m_type 0 ddb> trace db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:398 panic(ffffffff82191c3e) at panic+0x15c sys/kern/subr_prf.c:207 soreceive(fffffd805e558000,0,ffff80001d382c38,0,0,ffff80001d382b44) at soreceive+0x16e7 soo_read(fffffd80653fb870,ffff80001d382c38,0) at soo_read+0x53 sys/kern/sys_socket.c:70 dofilereadv(ffff80001d349758,6,ffff80001d382c38,0,ffff80001d382d20) at dofilereadv+0x1a1 sys/kern/sys_generic.c:236 sys_read(ffff80001d349758,ffff80001d382cd0,ffff80001d382d20) at sys_read+0x83 sys/kern/sys_generic.c:156 syscall(ffff80001d382da0) at syscall+0x507 sys/arch/amd64/amd64/trap.c:570 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f7ffffe6ee0, count: -8 ddb> show registers rdi 0 rsi 0x1 rbp 0xffff80001d382980 rbx 0xffff80001d382a30 rdx 0x2 rcx 0x1 rax 0x1 r8 0xffff80001d382940 r9 0x1 r10 0x2a213ac47b8a86c9 r11 0xb82683251f6fee76 r12 0x3000000008 r13 0xffff80001d382990 r14 0x100 r15 0x1 rip 0xffffffff815fb778 db_enter+0x18 cs 0x8 rflags 0x246 rsp 0xffff80001d382970 ss 0x10 db_enter+0x18: addq $0x8,%rsp ddb> show proc PROC (dhclient) pid=274543 stat=onproc flags process=0 proc=0 pri=24, usrpri=50, nice=20 forw=0xffffffffffffffff, list=0xffff80001d34a118,0xffff80001d3499d8 process=0xffff8000ffffa010 user=0xffff80001d37d000, vmspace=0xfffffd806bc09440 estcpu=0, cpticks=0, pctcpu=0.0 user=0, sys=0, intr=0 ddb> ps PID TID PPID UID S FLAGS WAIT COMMAND 57127 523053 99440 0 3 0x82 thrsleep syz-execprog 57127 37336 99440 0 3 0x4000082 thrsleep syz-execprog 57127 302620 99440 0 3 0x4000082 thrsleep syz-execprog 57127 270283 99440 0 3 0x4000082 thrsleep syz-execprog 57127 80224 99440 0 3 0x4000082 wait syz-execprog 57127 231247 99440 0 3 0x4000082 kqread syz-execprog 57127 37187 99440 0 3 0x4000082 thrsleep syz-execprog 99440 72332 35771 0 3 0x10008a pause ksh 35771 257470 74619 0 3 0x92 select sshd 10401 350693 1 0 3 0x100083 ttyin getty 74619 457551 1 0 3 0x80 select sshd 71236 127094 13544 73 3 0x100090 kqread syslogd 13544 307210 1 0 3 0x100082 netio syslogd 21851 196171 1 77 2 0x100010 dhclient *86406 274543 1 0 7 0 dhclient 50348 167079 0 0 3 0x14200 pgzero zerothread 83064 416068 0 0 3 0x14200 aiodoned aiodoned 77548 491259 0 0 3 0x14200 syncer update 48551 253230 0 0 3 0x14200 cleaner cleaner 27125 411676 0 0 3 0x14200 reaper reaper 78708 155710 0 0 3 0x14200 pgdaemon pagedaemon 45367 397970 0 0 3 0x14200 bored crynlk 12650 444473 0 0 3 0x14200 bored crypto 51477 163588 0 0 3 0x40014200 acpi0 acpi0 74426 370879 0 0 2 0x14200 softnet 93191 24908 0 0 2 0x14200 systqmp 27411 9454 0 0 3 0x14200 bored systq 20669 333265 0 0 3 0x40014200 bored softclock 51917 119369 0 0 3 0x40014200 idle0 2987 133873 0 0 3 0x14200 bored smr 1 107554 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 9440 6321K 6321K 78643K 10539 0 pcb 13 8K 8K 78643K 13 0 rtable 63 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 1180 74K 74K 78643K 1185 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 72 11K 12K 78643K 858 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 3001K 3065K 78643K 1690 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 11 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 1 0 1 0 8 0 tcpqe 32 3 0 3 1 1 0 1 0 8 0 tcpcb 544 8 0 2 1 0 1 1 0 8 0 inpcb 280 27 0 18 1 0 1 1 0 8 0 nd6 48 2 0 2 1 0 1 1 0 8 1 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 168 0 0 11 0 11 11 0 8 0 art_table 32 169 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 dino1pl 128 1415 0 20 46 0 46 46 0 8 1 ffsino 240 1415 0 20 83 0 83 83 0 8 0 nchpl 144 1640 0 38 60 0 60 60 0 8 0 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 3864 0 3864 1 0 1 1 0 8 1 scxspl 192 4353 0 4353 1 0 1 1 0 8 1 plimitpl 152 14 0 8 1 0 1 1 0 8 0 sigapl 432 197 0 186 2 0 2 2 0 8 0 knotepl 112 39 0 30 1 0 1 1 0 8 0 kqueuepl 104 2 0 0 1 0 1 1 0 8 0 pipelkpl 16 67 0 61 1 0 1 1 0 8 0 pipepl 120 134 0 123 1 0 1 1 0 8 0 fdescpl 432 198 0 186 2 0 2 2 0 8 0 filepl 120 998 0 947 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 47 0 40 1 0 1 1 0 8 0 zombiepl 144 187 0 186 1 0 1 1 0 8 0 processpl 896 212 0 186 4 0 4 4 0 8 0 procpl 624 218 0 186 3 0 3 3 0 8 0 sockpl 400 71 0 52 3 0 3 3 0 8 0 mcl4k 4096 10 0 10 1 1 0 1 0 8 0 mcl2k 2048 5641 0 5613 7 3 4 7 0 8 0 mtagpl 80 2 0 2 1 1 0 1 0 8 0 mbufpl 256 9999 0 9922 8 1 7 7 0 8 0 bufpl 280 3717 0 183 253 0 253 253 0 8 0 anonpl 16 20480 0 19015 15 2 13 13 0 107 6 amapchunkpl 152 763 0 702 5 0 5 5 0 158 2 amappl16 192 75 0 51 2 0 2 2 0 8 0 amappl15 184 50 0 46 1 0 1 1 0 8 0 amappl14 176 26 0 22 1 0 1 1 0 8 0 amappl12 160 1 0 0 1 0 1 1 0 8 0 amappl11 152 52 0 38 1 0 1 1 0 8 0 amappl10 144 7 0 6 1 0 1 1 0 8 0 amappl9 136 193 0 191 1 0 1 1 0 8 0 amappl8 128 82 0 73 1 0 1 1 0 8 0 amappl7 120 87 0 78 1 0 1 1 0 8 0 amappl6 112 59 0 54 1 0 1 1 0 8 0 amappl5 104 535 0 526 1 0 1 1 0 8 0 amappl4 96 424 0 400 1 0 1 1 0 8 0 amappl3 88 124 0 117 1 0 1 1 0 8 0 amappl2 80 832 0 773 3 0 3 3 0 8 1 amappl1 72 13902 0 13505 26 8 18 20 0 8 8 amappl 80 419 0 394 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 6034 0 6014 1 0 1 1 0 8 0 vmmpepl 168 29943 0 29075 84 6 78 78 0 357 37 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 104117 0 100392 113 0 113 113 0 265 81 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 112 130 0 7 4 0 4 4 0 8 0 ddb>