panic: receive 3: so 0xfffffd8065d45190, so_type 3, m 0xfffffd805a795400, m_type 0 Stopped at db_enter+0x18: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND *363956 43085 0 0 0 0 dhclient db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:398 panic(ffffffff823a43bf) at panic+0x15c sys/kern/subr_prf.c:207 soreceive(fffffd8065d45190,0,ffff80001d6e21f8,0,0,ffff80001d6e2104) at soreceive+0x16e7 soo_read(fffffd8065ff9690,ffff80001d6e21f8,0) at soo_read+0x53 sys/kern/sys_socket.c:70 dofilereadv(ffff80001d6a94e8,6,ffff80001d6e21f8,0,ffff80001d6e22e0) at dofilereadv+0x1a1 sys/kern/sys_generic.c:237 sys_read(ffff80001d6a94e8,ffff80001d6e2290,ffff80001d6e22e0) at sys_read+0x83 sys/kern/sys_generic.c:157 syscall(ffff80001d6e2360) at syscall+0x507 sys/arch/amd64/amd64/trap.c:570 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f7fffff0e50, 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 0xfffffd8065d45190, so_type 3, m 0xfffffd805a795400, m_type 0 ddb> trace db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:398 panic(ffffffff823a43bf) at panic+0x15c sys/kern/subr_prf.c:207 soreceive(fffffd8065d45190,0,ffff80001d6e21f8,0,0,ffff80001d6e2104) at soreceive+0x16e7 soo_read(fffffd8065ff9690,ffff80001d6e21f8,0) at soo_read+0x53 sys/kern/sys_socket.c:70 dofilereadv(ffff80001d6a94e8,6,ffff80001d6e21f8,0,ffff80001d6e22e0) at dofilereadv+0x1a1 sys/kern/sys_generic.c:237 sys_read(ffff80001d6a94e8,ffff80001d6e2290,ffff80001d6e22e0) at sys_read+0x83 sys/kern/sys_generic.c:157 syscall(ffff80001d6e2360) at syscall+0x507 sys/arch/amd64/amd64/trap.c:570 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f7fffff0e50, count: -8 ddb> show registers rdi 0 rsi 0x1 rbp 0xffff80001d6e1f40 rbx 0xffff80001d6e1ff0 rdx 0x2 rcx 0 rax 0x1 r8 0xffffffff822e7d3f kprintf+0x15f r9 0x1 r10 0x2 r11 0x8f8826e373c6af6 r12 0x3000000008 r13 0xffff80001d6e1f50 r14 0x100 r15 0x1 rip 0xffffffff81b9cc28 db_enter+0x18 cs 0x8 rflags 0x246 rsp 0xffff80001d6e1f30 ss 0x10 db_enter+0x18: addq $0x8,%rsp ddb> show proc PROC (dhclient) pid=363956 stat=onproc flags process=0 proc=0 pri=24, usrpri=50, nice=20 forw=0xffffffffffffffff, list=0xffff80001d6aa5f8,0xffff80001d6a9768 process=0xffff8000ffffa010 user=0xffff80001d6dd000, vmspace=0xfffffd806bc0a220 estcpu=0, cpticks=0, pctcpu=0.0 user=0, sys=0, intr=0 ddb> ps PID TID PPID UID S FLAGS WAIT COMMAND 21779 299124 90510 0 3 0x82 wait syz-execprog 21779 492158 90510 0 3 0x4000082 thrsleep syz-execprog 21779 500075 90510 0 3 0x4000082 thrsleep syz-execprog 21779 166535 90510 0 3 0x4000082 thrsleep syz-execprog 21779 228141 90510 0 3 0x4000082 thrsleep syz-execprog 21779 49381 90510 0 3 0x4000082 kqread syz-execprog 21779 313757 90510 0 3 0x4000082 thrsleep syz-execprog 21779 94859 90510 0 3 0x4000082 thrsleep syz-execprog 90510 14955 92283 0 3 0x10008a pause ksh 92283 302243 82491 0 3 0x92 select sshd 34543 326640 1 0 3 0x100083 ttyin getty 82491 142603 1 0 3 0x80 select sshd 47402 465903 91977 73 3 0x100090 kqread syslogd 91977 204813 1 0 3 0x100082 netio syslogd 65504 187894 1 77 2 0x100010 dhclient *43085 363956 1 0 7 0 dhclient 74438 496335 0 0 3 0x14200 bored smr 73411 280124 0 0 3 0x14200 pgzero zerothread 62603 386546 0 0 3 0x14200 aiodoned aiodoned 93301 278355 0 0 3 0x14200 syncer update 20539 343002 0 0 3 0x14200 cleaner cleaner 74945 54354 0 0 3 0x14200 reaper reaper 31701 221491 0 0 3 0x14200 pgdaemon pagedaemon 48689 409244 0 0 3 0x14200 bored crynlk 10897 279690 0 0 3 0x14200 bored crypto 91634 62490 0 0 3 0x40014200 acpi0 acpi0 69026 35606 0 0 2 0x14200 softnet 82083 357129 0 0 2 0x14200 systqmp 93735 138864 0 0 3 0x14200 bored systq 97758 423286 0 0 3 0x40014200 bored softclock 15832 109455 0 0 3 0x40014200 idle0 1 74713 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 9442 6321K 6321K 78643K 10543 0 pcb 13 8K 8K 78643K 13 0 rtable 61 1K 2K 78643K 156 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 1809 195K 288K 78643K 12938 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 837 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 3837K 3901K 78643K 1624 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 296 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 1633 0 39 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 3939 0 3939 1 0 1 1 0 8 1 scxspl 192 4204 0 4204 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 120 979 0 928 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 5521 0 5493 6 2 4 6 0 8 0 mtagpl 96 2 0 2 1 1 0 1 0 8 0 mbufpl 256 9664 0 9590 8 1 7 7 0 8 0 bufpl 280 2959 0 126 203 0 203 203 0 8 0 anonpl 16 20336 0 18850 14 2 12 12 0 107 4 amapchunkpl 152 727 0 667 4 0 4 4 0 158 1 amappl16 192 119 0 91 2 0 2 2 0 8 0 amappl15 184 9 0 7 1 0 1 1 0 8 0 amappl14 176 26 0 23 1 0 1 1 0 8 0 amappl13 168 21 0 19 1 0 1 1 0 8 0 amappl12 160 8 0 5 2 1 1 1 0 8 0 amappl11 152 44 0 34 1 0 1 1 0 8 0 amappl10 144 16 0 12 1 0 1 1 0 8 0 amappl9 136 207 0 206 1 0 1 1 0 8 0 amappl8 128 237 0 230 1 0 1 1 0 8 0 amappl7 120 102 0 91 1 0 1 1 0 8 0 amappl6 112 23 0 20 2 1 1 1 0 8 0 amappl5 104 158 0 149 1 0 1 1 0 8 0 amappl4 96 426 0 402 1 0 1 1 0 8 0 amappl3 88 107 0 101 1 0 1 1 0 8 0 amappl2 80 812 0 757 2 0 2 2 0 8 0 amappl1 72 13673 0 13274 23 6 17 17 0 8 7 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 6124 0 6104 2 0 2 2 0 8 0 vmmpepl 168 29032 0 28185 79 10 69 69 0 357 28 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 105002 0 101287 102 0 102 102 0 265 70 pmappl 200 197 0 186 1 0 1 1 0 8 0 extentpl 40 53 0 36 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(ffffffff823a43bf) at panic+0x15c sys/kern/subr_prf.c:207 soreceive(fffffd8065d45190,0,ffff80001d6e21f8,0,0,ffff80001d6e2104) at soreceive+0x16e7 soo_read(fffffd8065ff9690,ffff80001d6e21f8,0) at soo_read+0x53 sys/kern/sys_socket.c:70 dofilereadv(ffff80001d6a94e8,6,ffff80001d6e21f8,0,ffff80001d6e22e0) at dofilereadv+0x1a1 sys/kern/sys_generic.c:237 sys_read(ffff80001d6a94e8,ffff80001d6e2290,ffff80001d6e22e0) at sys_read+0x83 sys/kern/sys_generic.c:157 syscall(ffff80001d6e2360) at syscall+0x507 sys/arch/amd64/amd64/trap.c:570 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f7fffff0e50, 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(ffffffff823a43bf) at panic+0x15c sys/kern/subr_prf.c:207 soreceive(fffffd8065d45190,0,ffff80001d6e21f8,0,0,ffff80001d6e2104) at soreceive+0x16e7 soo_read(fffffd8065ff9690,ffff80001d6e21f8,0) at soo_read+0x53 sys/kern/sys_socket.c:70 dofilereadv(ffff80001d6a94e8,6,ffff80001d6e21f8,0,ffff80001d6e22e0) at dofilereadv+0x1a1 sys/kern/sys_generic.c:237 sys_read(ffff80001d6a94e8,ffff80001d6e2290,ffff80001d6e22e0) at sys_read+0x83 sys/kern/sys_generic.c:157 syscall(ffff80001d6e2360) at syscall+0x507 sys/arch/amd64/amd64/trap.c:570 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f7fffff0e50, count: -8 ddb>