panic: receive 1a: so 0xfffffd806297c190, so_type 3, m 0xfffffd805bf80700, m_type 0 Stopped at db_enter+0x18: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND *375001 85285 0 0 0 0 dhclient db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:398 panic(ffffffff823c8bea) at panic+0x15c sys/kern/subr_prf.c:207 soreceive(fffffd806297c190,0,ffff80001d6e23c8,0,0,ffff80001d6e22d4) at soreceive+0x170a sys/kern/uipc_socket.c:983 soo_read(fffffd805eab67f8,ffff80001d6e23c8,0) at soo_read+0x53 sys/kern/sys_socket.c:70 dofilereadv(ffff80001d6a94e8,6,ffff80001d6e23c8,0,ffff80001d6e24b0) at dofilereadv+0x1a1 sys/kern/sys_generic.c:237 sys_read(ffff80001d6a94e8,ffff80001d6e2460,ffff80001d6e24b0) at sys_read+0x83 sys/kern/sys_generic.c:157 syscall(ffff80001d6e2530) at syscall+0x507 sys/arch/amd64/amd64/trap.c:570 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f7ffffd6480, 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 1a: so 0xfffffd806297c190, so_type 3, m 0xfffffd805bf80700, m_type 0 ddb> trace db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:398 panic(ffffffff823c8bea) at panic+0x15c sys/kern/subr_prf.c:207 soreceive(fffffd806297c190,0,ffff80001d6e23c8,0,0,ffff80001d6e22d4) at soreceive+0x170a sys/kern/uipc_socket.c:983 soo_read(fffffd805eab67f8,ffff80001d6e23c8,0) at soo_read+0x53 sys/kern/sys_socket.c:70 dofilereadv(ffff80001d6a94e8,6,ffff80001d6e23c8,0,ffff80001d6e24b0) at dofilereadv+0x1a1 sys/kern/sys_generic.c:237 sys_read(ffff80001d6a94e8,ffff80001d6e2460,ffff80001d6e24b0) at sys_read+0x83 sys/kern/sys_generic.c:157 syscall(ffff80001d6e2530) at syscall+0x507 sys/arch/amd64/amd64/trap.c:570 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f7ffffd6480, count: -8 ddb> show registers rdi 0 rsi 0x1 rbp 0xffff80001d6e2110 rbx 0xffff80001d6e21c0 rdx 0x2 rcx 0 rax 0x1 r8 0xffffffff8203df2f kprintf+0x15f r9 0x1 r10 0x2 r11 0x8aef56954728e1ed r12 0x3000000008 r13 0xffff80001d6e2120 r14 0x100 r15 0x1 rip 0xffffffff81fb0608 db_enter+0x18 cs 0x8 rflags 0x246 rsp 0xffff80001d6e2100 ss 0x10 db_enter+0x18: addq $0x8,%rsp ddb> show proc PROC (dhclient) pid=375001 stat=onproc flags process=0 proc=0 pri=24, usrpri=50, nice=20 forw=0xffffffffffffffff, list=0xffff80001d6aa388,0xffff80001d6a9768 process=0xffff8000ffffa010 user=0xffff80001d6dd000, vmspace=0xfffffd806bc09000 estcpu=0, cpticks=0, pctcpu=0.0 user=0, sys=0, intr=0 ddb> ps PID TID PPID UID S FLAGS WAIT COMMAND 43283 333945 94381 0 3 0x82 wait syz-execprog 43283 45816 94381 0 3 0x4000082 thrsleep syz-execprog 43283 473333 94381 0 3 0x4000082 thrsleep syz-execprog 43283 107893 94381 0 3 0x4000082 thrsleep syz-execprog 43283 388482 94381 0 3 0x4000082 kqread syz-execprog 43283 433624 94381 0 3 0x4000082 thrsleep syz-execprog 43283 159727 94381 0 3 0x4000082 thrsleep syz-execprog 94381 483510 19940 0 3 0x10008a pause ksh 19940 156899 73855 0 3 0x92 select sshd 8133 157481 1 0 3 0x100083 ttyin getty 73855 218743 1 0 3 0x80 select sshd 33631 52893 77744 73 3 0x100090 kqread syslogd 77744 133173 1 0 3 0x100082 netio syslogd 29663 63826 1 77 2 0x100010 dhclient *85285 375001 1 0 7 0 dhclient 86507 177081 0 0 3 0x14200 bored smr 31443 288405 0 0 3 0x14200 pgzero zerothread 82316 145 0 0 3 0x14200 aiodoned aiodoned 82857 254747 0 0 3 0x14200 syncer update 56375 443394 0 0 3 0x14200 cleaner cleaner 50881 149119 0 0 3 0x14200 reaper reaper 91133 423128 0 0 3 0x14200 pgdaemon pagedaemon 8687 292026 0 0 3 0x14200 bored crynlk 18669 82488 0 0 3 0x14200 bored crypto 22101 298896 0 0 3 0x40014200 acpi0 acpi0 12648 237766 0 0 2 0x14200 softnet 52462 408983 0 0 2 0x14200 systqmp 23335 12243 0 0 3 0x14200 bored systq 281 484991 0 0 3 0x40014200 bored softclock 8211 160822 0 0 3 0x40014200 idle0 1 308257 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 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 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 67 11K 12K 78643K 842 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 3845K 3909K 78643K 1625 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 2 1 1 1 0 8 1 tcpqe 32 1 0 1 1 1 0 1 0 8 0 tcpcb 544 8 0 4 1 0 1 1 0 8 0 inpcb 296 27 0 20 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 256 145 0 0 10 0 10 10 0 8 0 art_table 32 146 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 1634 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 3941 0 3941 2 1 1 1 0 8 1 scxspl 192 4433 0 4433 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 2 1 1 1 0 8 0 pipepl 120 140 0 129 2 1 1 1 0 8 0 fdescpl 432 198 0 186 2 0 2 2 0 8 0 filepl 120 980 0 929 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 2 1 1 1 0 8 0 processpl 920 212 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 54 2 0 2 2 0 8 0 mcl4k 4096 10 0 10 2 1 1 1 0 8 1 mcl2k 2048 5561 0 5533 6 2 4 6 0 8 0 mtagpl 96 2 0 2 1 1 0 1 0 8 0 mbufpl 256 9790 0 9709 7 0 7 7 0 8 0 bufpl 280 2960 0 125 203 0 203 203 0 8 0 anonpl 16 20480 0 18991 14 2 12 12 0 107 4 amapchunkpl 152 815 0 755 4 0 4 4 0 158 1 amappl16 192 129 0 103 2 0 2 2 0 8 0 amappl15 184 9 0 7 1 0 1 1 0 8 0 amappl14 176 25 0 22 1 0 1 1 0 8 0 amappl13 168 22 0 20 2 1 1 1 0 8 0 amappl12 160 12 0 8 2 1 1 1 0 8 0 amappl11 152 41 0 32 1 0 1 1 0 8 0 amappl10 144 14 0 10 1 0 1 1 0 8 0 amappl9 136 168 0 167 1 0 1 1 0 8 0 amappl8 128 241 0 233 1 0 1 1 0 8 0 amappl7 120 104 0 92 1 0 1 1 0 8 0 amappl6 112 21 0 18 2 1 1 1 0 8 0 amappl5 104 248 0 238 1 0 1 1 0 8 0 amappl4 96 426 0 404 1 0 1 1 0 8 0 amappl3 88 107 0 102 1 0 1 1 0 8 0 amappl2 80 804 0 750 3 1 2 2 0 8 0 amappl1 72 13580 0 13192 25 8 17 17 0 8 9 amappl 80 422 0 397 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 6120 0 6098 2 0 2 2 0 8 0 vmmpepl 168 29199 0 28366 82 13 69 69 0 357 31 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 104922 0 101207 105 3 102 102 0 265 69 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 112 215 0 6 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(ffffffff823c8bea) at panic+0x15c sys/kern/subr_prf.c:207 soreceive(fffffd806297c190,0,ffff80001d6e23c8,0,0,ffff80001d6e22d4) at soreceive+0x170a sys/kern/uipc_socket.c:983 soo_read(fffffd805eab67f8,ffff80001d6e23c8,0) at soo_read+0x53 sys/kern/sys_socket.c:70 dofilereadv(ffff80001d6a94e8,6,ffff80001d6e23c8,0,ffff80001d6e24b0) at dofilereadv+0x1a1 sys/kern/sys_generic.c:237 sys_read(ffff80001d6a94e8,ffff80001d6e2460,ffff80001d6e24b0) at sys_read+0x83 sys/kern/sys_generic.c:157 syscall(ffff80001d6e2530) at syscall+0x507 sys/arch/amd64/amd64/trap.c:570 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f7ffffd6480, 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(ffffffff823c8bea) at panic+0x15c sys/kern/subr_prf.c:207 soreceive(fffffd806297c190,0,ffff80001d6e23c8,0,0,ffff80001d6e22d4) at soreceive+0x170a sys/kern/uipc_socket.c:983 soo_read(fffffd805eab67f8,ffff80001d6e23c8,0) at soo_read+0x53 sys/kern/sys_socket.c:70 dofilereadv(ffff80001d6a94e8,6,ffff80001d6e23c8,0,ffff80001d6e24b0) at dofilereadv+0x1a1 sys/kern/sys_generic.c:237 sys_read(ffff80001d6a94e8,ffff80001d6e2460,ffff80001d6e24b0) at sys_read+0x83 sys/kern/sys_generic.c:157 syscall(ffff80001d6e2530) at syscall+0x507 sys/arch/amd64/amd64/trap.c:570 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f7ffffd6480, count: -8 ddb>