panic: receive 3: so 0xfffffd805e4ea000, so_type 3, m 0xfffffd805c13a900, m_type 0 Stopped at db_enter+0x18: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND * 83372 57297 0 0 0 0 dhclient db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:398 panic(ffffffff8218cb67) at panic+0x15c sys/kern/subr_prf.c:207 soreceive(fffffd805e4ea000,0,ffff80001d3767e8,0,0,ffff80001d3766f4) at soreceive+0x16e7 soo_read(fffffd80619f6168,ffff80001d3767e8,0) at soo_read+0x53 sys/kern/sys_socket.c:70 dofilereadv(ffff8000ffff8ed8,6,ffff80001d3767e8,0,ffff80001d3768d0) at dofilereadv+0x1a2 sys/kern/sys_generic.c:236 sys_read(ffff8000ffff8ed8,ffff80001d376880,ffff80001d3768d0) at sys_read+0x83 sys/kern/sys_generic.c:156 syscall(ffff80001d376950) at syscall+0x507 sys/arch/amd64/amd64/trap.c:555 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f7fffff8d50, 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 0xfffffd805e4ea000, so_type 3, m 0xfffffd805c13a900, m_type 0 ddb> trace db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:398 panic(ffffffff8218cb67) at panic+0x15c sys/kern/subr_prf.c:207 soreceive(fffffd805e4ea000,0,ffff80001d3767e8,0,0,ffff80001d3766f4) at soreceive+0x16e7 soo_read(fffffd80619f6168,ffff80001d3767e8,0) at soo_read+0x53 sys/kern/sys_socket.c:70 dofilereadv(ffff8000ffff8ed8,6,ffff80001d3767e8,0,ffff80001d3768d0) at dofilereadv+0x1a2 sys/kern/sys_generic.c:236 sys_read(ffff8000ffff8ed8,ffff80001d376880,ffff80001d3768d0) at sys_read+0x83 sys/kern/sys_generic.c:156 syscall(ffff80001d376950) at syscall+0x507 sys/arch/amd64/amd64/trap.c:555 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f7fffff8d50, count: -8 ddb> show registers rdi 0 rsi 0x1 rbp 0xffff80001d376530 rbx 0xffff80001d3765e0 rdx 0x2 rcx 0x1 rax 0x1 r8 0xffff80001d3764f0 r9 0x1 r10 0xfed50ee9806732ea r11 0x4b341b761c97159e r12 0x3000000008 r13 0xffff80001d376540 r14 0x100 r15 0x1 rip 0xffffffff82063a78 db_enter+0x18 cs 0x8 rflags 0x246 rsp 0xffff80001d376520 ss 0x10 db_enter+0x18: addq $0x8,%rsp ddb> show proc PROC (dhclient) pid=83372 stat=onproc flags process=0 proc=0 pri=50, usrpri=50, nice=20 forw=0xffffffffffffffff, list=0xffff8000ffff8008,0xffff8000ffff93d8 process=0xffff8000ffff6a48 user=0xffff80001d371000, vmspace=0xfffffd806bc11220 estcpu=0, cpticks=1, pctcpu=0.0 user=0, sys=1, intr=0 ddb> ps PID TID PPID UID S FLAGS WAIT COMMAND 73747 222467 26309 0 3 0x82 thrsleep syz-execprog 73747 101069 26309 0 3 0x4000082 nanosleep syz-execprog 73747 362623 26309 0 3 0x4000082 thrsleep syz-execprog 73747 367649 26309 0 3 0x4000082 thrsleep syz-execprog 73747 1186 26309 0 3 0x4000082 wait syz-execprog 73747 256574 26309 0 3 0x4000082 thrsleep syz-execprog 73747 513830 26309 0 3 0x4000082 thrsleep syz-execprog 26309 216107 29475 0 3 0x10008a pause ksh 29475 142578 33122 0 3 0x92 select sshd 27131 53400 1 0 3 0x100083 ttyin getty 33122 52912 1 0 3 0x80 select sshd 31882 521442 97084 73 3 0x100090 kqread syslogd 97084 368626 1 0 3 0x100082 netio syslogd 80099 279560 1 77 2 0x100010 dhclient *57297 83372 1 0 7 0 dhclient 30041 190268 0 0 3 0x14200 pgzero zerothread 26343 51550 0 0 3 0x14200 aiodoned aiodoned 99779 333582 0 0 3 0x14200 syncer update 93237 51224 0 0 3 0x14200 cleaner cleaner 50389 189450 0 0 3 0x14200 reaper reaper 64175 30641 0 0 3 0x14200 pgdaemon pagedaemon 15774 138890 0 0 3 0x14200 bored crynlk 44677 40367 0 0 3 0x14200 bored crypto 11433 119914 0 0 3 0x40014200 acpi0 acpi0 86145 36343 0 0 2 0x14200 softnet 91204 150221 0 0 2 0x14200 systqmp 67235 7788 0 0 3 0x14200 bored systq 56139 69184 0 0 3 0x40014200 bored softclock 95012 431268 0 0 3 0x40014200 idle0 19309 270521 0 0 3 0x14200 bored smr 1 410019 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 157 0 ifaddr 24 7K 9K 78643K 33 0 counters 19 16K 16K 78643K 19 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 18 79K 79K 78643K 18 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 73 11K 12K 78643K 861 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 22 3013K 3077K 78643K 3059 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 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 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 256 167 0 0 11 0 11 11 0 8 0 art_table 32 168 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 3999 0 3999 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 28 1 0 1 1 0 8 0 kqueuepl 104 2 0 0 1 0 1 1 0 8 0 pipepl 128 134 0 122 1 0 1 1 0 8 0 fdescpl 424 198 0 186 2 0 2 2 0 8 0 filepl 120 998 0 946 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 872 212 0 186 4 0 4 4 0 8 0 procpl 632 218 0 186 3 0 3 3 0 8 0 sockpl 384 71 0 55 2 0 2 2 0 8 0 mcl4k 4096 10 0 10 1 0 1 1 0 8 1 mcl2k 2048 5482 0 5448 8 3 5 8 0 8 0 mtagpl 80 2 0 2 1 1 0 1 0 8 0 mbufpl 256 9511 0 9423 9 2 7 7 0 8 0 bufpl 280 5845 0 1326 323 0 323 323 0 8 0 anonpl 16 20312 0 18840 14 1 13 13 0 107 6 amapchunkpl 152 744 0 685 5 0 5 5 0 158 2 amappl16 192 85 0 61 2 0 2 2 0 8 0 amappl15 184 50 0 46 1 0 1 1 0 8 0 amappl14 176 21 0 18 1 0 1 1 0 8 0 amappl12 160 8 0 4 1 0 1 1 0 8 0 amappl11 152 49 0 37 1 0 1 1 0 8 0 amappl10 144 10 0 10 1 0 1 1 0 8 1 amappl9 136 390 0 387 1 0 1 1 0 8 0 amappl8 128 84 0 75 1 0 1 1 0 8 0 amappl7 120 85 0 76 1 0 1 1 0 8 0 amappl6 112 65 0 59 1 0 1 1 0 8 0 amappl5 104 138 0 129 1 0 1 1 0 8 0 amappl4 96 423 0 399 1 0 1 1 0 8 0 amappl3 88 124 0 117 1 0 1 1 0 8 0 amappl2 80 851 0 794 3 0 3 3 0 8 1 amappl1 72 13349 0 12953 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 6057 0 6042 1 0 1 1 0 8 0 vmmpepl 168 29435 0 28573 83 5 78 78 0 357 38 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 103499 0 99792 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 112 126 0 7 4 0 4 4 0 8 0 ddb>