panic: receive 3: so 0xfffffd8061089000, so_type 3, m 0xfffffd805a9f7400, m_type 0 Stopped at db_enter+0x18: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND *492541 63550 0 0 0 0 dhclient db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:398 panic(ffffffff821b4228) at panic+0x15c sys/kern/subr_prf.c:207 soreceive(fffffd8061089000,0,ffff80001d372078,0,0,ffff80001d371f84) at soreceive+0x16e7 soo_read(fffffd80611f1258,ffff80001d372078,0) at soo_read+0x53 sys/kern/sys_socket.c:70 dofilereadv(ffff80001d339008,6,ffff80001d372078,0,ffff80001d372160) at dofilereadv+0x1a1 sys/kern/sys_generic.c:237 sys_read(ffff80001d339008,ffff80001d372110,ffff80001d372160) at sys_read+0x83 sys/kern/sys_generic.c:157 syscall(ffff80001d3721e0) at syscall+0x507 sys/arch/amd64/amd64/trap.c:570 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f7ffffe88f0, 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 0xfffffd8061089000, so_type 3, m 0xfffffd805a9f7400, m_type 0 ddb> trace db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:398 panic(ffffffff821b4228) at panic+0x15c sys/kern/subr_prf.c:207 soreceive(fffffd8061089000,0,ffff80001d372078,0,0,ffff80001d371f84) at soreceive+0x16e7 soo_read(fffffd80611f1258,ffff80001d372078,0) at soo_read+0x53 sys/kern/sys_socket.c:70 dofilereadv(ffff80001d339008,6,ffff80001d372078,0,ffff80001d372160) at dofilereadv+0x1a1 sys/kern/sys_generic.c:237 sys_read(ffff80001d339008,ffff80001d372110,ffff80001d372160) at sys_read+0x83 sys/kern/sys_generic.c:157 syscall(ffff80001d3721e0) at syscall+0x507 sys/arch/amd64/amd64/trap.c:570 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f7ffffe88f0, count: -8 ddb> show registers rdi 0 rsi 0x1 rbp 0xffff80001d371dc0 rbx 0xffff80001d371e70 rdx 0x2 rcx 0x1 rax 0x1 r8 0xffff80001d371d80 r9 0x1 r10 0x1e967d074e04a40e r11 0xc445d06fc5c596be r12 0x3000000008 r13 0xffff80001d371dd0 r14 0x100 r15 0x1 rip 0xffffffff81a40ae8 db_enter+0x18 cs 0x8 rflags 0x246 rsp 0xffff80001d371db0 ss 0x10 db_enter+0x18: addq $0x8,%rsp ddb> show proc PROC (dhclient) pid=492541 stat=onproc flags process=0 proc=0 pri=24, usrpri=50, nice=20 forw=0xffffffffffffffff, list=0xffff80001d33a5f8,0xffff80001d339288 process=0xffff8000ffffaa90 user=0xffff80001d36d000, vmspace=0xfffffd806bc0a330 estcpu=0, cpticks=0, pctcpu=0.0 user=0, sys=0, intr=0 ddb> ps PID TID PPID UID S FLAGS WAIT COMMAND 57921 333256 23621 0 3 0x82 wait syz-execprog 57921 314817 23621 0 3 0x4000082 thrsleep syz-execprog 57921 502136 23621 0 3 0x4000082 thrsleep syz-execprog 57921 478688 23621 0 3 0x4000082 thrsleep syz-execprog 57921 166654 23621 0 3 0x4000082 thrsleep syz-execprog 57921 258353 23621 0 3 0x4000082 kqread syz-execprog 57921 269971 23621 0 3 0x4000082 thrsleep syz-execprog 23621 473631 69695 0 3 0x10008a pause ksh 69695 88060 35775 0 3 0x92 select sshd 33515 502439 1 0 3 0x100083 ttyin getty 35775 233836 1 0 3 0x80 select sshd 22803 492290 75200 73 3 0x100090 kqread syslogd 75200 220027 1 0 3 0x100082 netio syslogd 88753 103558 1 77 2 0x100010 dhclient *63550 492541 1 0 7 0 dhclient 54572 470304 0 0 3 0x14200 bored smr 53125 266947 0 0 3 0x14200 pgzero zerothread 24937 492779 0 0 3 0x14200 aiodoned aiodoned 87980 473592 0 0 3 0x14200 syncer update 61974 107863 0 0 3 0x14200 cleaner cleaner 19644 2996 0 0 3 0x14200 reaper reaper 26542 352574 0 0 3 0x14200 pgdaemon pagedaemon 57142 389007 0 0 3 0x14200 bored crynlk 70116 259529 0 0 3 0x14200 bored crypto 94097 419316 0 0 3 0x40014200 acpi0 acpi0 88220 319132 0 0 2 0x14200 softnet 18829 294626 0 0 2 0x14200 systqmp 58428 360855 0 0 3 0x14200 bored systq 25879 169628 0 0 3 0x40014200 bored softclock 54845 300679 0 0 3 0x40014200 idle0 1 40909 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 68 11K 12K 78643K 838 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 3009K 3073K 78643K 1666 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 dino1pl 128 1414 0 20 45 0 45 45 0 8 0 ffsino 240 1414 0 20 83 0 83 83 0 8 1 nchpl 144 1639 0 38 60 0 60 60 0 8 0 uvmvnodes 72 1423 0 0 26 0 26 26 0 8 0 vnodes 208 1423 0 0 75 0 75 75 0 8 0 namei 1024 3833 0 3833 1 0 1 1 0 8 1 scxspl 192 4356 0 4356 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 39 0 30 1 0 1 1 0 8 0 kqueuepl 144 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 120 964 0 913 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 55 2 0 2 2 0 8 0 mcl4k 4096 10 0 10 1 0 1 1 0 8 1 mcl2k 2048 5511 0 5480 7 2 5 7 0 8 0 mtagpl 80 2 0 2 1 1 0 1 0 8 0 mbufpl 256 9626 0 9549 9 2 7 7 0 8 0 bufpl 280 3648 0 161 250 0 250 250 0 8 0 anonpl 16 20367 0 18927 14 1 13 13 0 107 6 amapchunkpl 152 703 0 642 5 0 5 5 0 158 2 amappl16 192 127 0 100 2 0 2 2 0 8 0 amappl15 184 3 0 1 1 0 1 1 0 8 0 amappl14 176 3 0 1 2 1 1 1 0 8 0 amappl13 168 26 0 24 1 0 1 1 0 8 0 amappl12 160 13 0 10 2 1 1 1 0 8 0 amappl11 152 62 0 50 1 0 1 1 0 8 0 amappl10 144 14 0 10 1 0 1 1 0 8 0 amappl9 136 191 0 189 1 0 1 1 0 8 0 amappl8 128 233 0 227 1 0 1 1 0 8 0 amappl7 120 102 0 93 1 0 1 1 0 8 0 amappl6 112 21 0 18 1 0 1 1 0 8 0 amappl5 104 198 0 189 1 0 1 1 0 8 0 amappl4 96 442 0 417 1 0 1 1 0 8 0 amappl3 88 112 0 106 1 0 1 1 0 8 0 amappl2 80 833 0 780 3 0 3 3 0 8 1 amappl1 72 13565 0 13176 26 8 18 20 0 8 8 amappl 80 420 0 395 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 6025 0 6005 2 0 2 2 0 8 1 vmmpepl 168 29128 0 28291 85 8 77 77 0 357 39 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 103387 0 99715 113 0 113 113 0 265 82 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 112 128 0 6 4 0 4 4 0 8 0 ddb>