panic: receive 1a: so 0xfffffd805e564000, so_type 3, m 0xfffffd805e4e9100, m_type 0 Stopped at db_enter+0x18: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND * 7785 53007 0 0 0 0 dhclient db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:398 panic(ffffffff821b7268) at panic+0x15c sys/kern/subr_prf.c:207 soreceive(fffffd805e564000,0,ffff80001d372af8,0,0,ffff80001d372a04) at soreceive+0x170a sys/kern/uipc_socket.c:977 soo_read(fffffd80611f01e0,ffff80001d372af8,0) at soo_read+0x53 sys/kern/sys_socket.c:70 dofilereadv(ffff80001d339008,6,ffff80001d372af8,0,ffff80001d372be0) at dofilereadv+0x1a1 sys/kern/sys_generic.c:237 sys_read(ffff80001d339008,ffff80001d372b90,ffff80001d372be0) at sys_read+0x83 sys/kern/sys_generic.c:157 syscall(ffff80001d372c60) at syscall+0x507 sys/arch/amd64/amd64/trap.c:570 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f7fffff0550, 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 0xfffffd805e564000, so_type 3, m 0xfffffd805e4e9100, m_type 0 ddb> trace db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:398 panic(ffffffff821b7268) at panic+0x15c sys/kern/subr_prf.c:207 soreceive(fffffd805e564000,0,ffff80001d372af8,0,0,ffff80001d372a04) at soreceive+0x170a sys/kern/uipc_socket.c:977 soo_read(fffffd80611f01e0,ffff80001d372af8,0) at soo_read+0x53 sys/kern/sys_socket.c:70 dofilereadv(ffff80001d339008,6,ffff80001d372af8,0,ffff80001d372be0) at dofilereadv+0x1a1 sys/kern/sys_generic.c:237 sys_read(ffff80001d339008,ffff80001d372b90,ffff80001d372be0) at sys_read+0x83 sys/kern/sys_generic.c:157 syscall(ffff80001d372c60) at syscall+0x507 sys/arch/amd64/amd64/trap.c:570 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f7fffff0550, count: -8 ddb> show registers rdi 0 rsi 0x1 rbp 0xffff80001d372840 rbx 0xffff80001d3728f0 rdx 0x2 rcx 0x1 rax 0x1 r8 0xffff80001d372800 r9 0x1 r10 0xbdfb72a5c3884cb1 r11 0x63506d64e484a8a8 r12 0x3000000008 r13 0xffff80001d372850 r14 0x100 r15 0x1 rip 0xffffffff8202c998 db_enter+0x18 cs 0x8 rflags 0x246 rsp 0xffff80001d372830 ss 0x10 db_enter+0x18: addq $0x8,%rsp ddb> show proc PROC (dhclient) pid=7785 stat=onproc flags process=0 proc=0 pri=24, usrpri=50, nice=20 forw=0xffffffffffffffff, list=0xffff80001d33a118,0xffff80001d339288 process=0xffff8000ffffa390 user=0xffff80001d36d000, vmspace=0xfffffd806bc09220 estcpu=0, cpticks=0, pctcpu=0.0 user=0, sys=0, intr=0 ddb> ps PID TID PPID UID S FLAGS WAIT COMMAND 56034 275638 45931 0 3 0x82 thrsleep syz-execprog 56034 472802 45931 0 3 0x4000082 thrsleep syz-execprog 56034 410739 45931 0 3 0x4000082 wait syz-execprog 56034 125470 45931 0 3 0x4000082 thrsleep syz-execprog 56034 52029 45931 0 3 0x4000082 thrsleep syz-execprog 56034 159480 45931 0 3 0x4000082 kqread syz-execprog 56034 129428 45931 0 3 0x4000082 thrsleep syz-execprog 45931 125712 46740 0 3 0x10008a pause ksh 46740 402862 93782 0 3 0x92 select sshd 53957 311909 1 0 3 0x100083 ttyin getty 93782 260807 1 0 3 0x80 select sshd 91586 455304 48927 73 3 0x100090 kqread syslogd 48927 432083 1 0 3 0x100082 netio syslogd 73851 267537 1 77 2 0x100010 dhclient *53007 7785 1 0 7 0 dhclient 46719 231524 0 0 3 0x14200 pgzero zerothread 92556 173847 0 0 3 0x14200 aiodoned aiodoned 30827 212949 0 0 3 0x14200 syncer update 37845 342033 0 0 3 0x14200 cleaner cleaner 79292 484700 0 0 3 0x14200 reaper reaper 77181 432087 0 0 3 0x14200 pgdaemon pagedaemon 46405 196636 0 0 3 0x14200 bored crynlk 95674 19911 0 0 3 0x14200 bored crypto 31781 365308 0 0 3 0x40014200 acpi0 acpi0 8713 333493 0 0 2 0x14200 softnet 70993 12059 0 0 2 0x14200 systqmp 592 405374 0 0 3 0x14200 bored systq 62307 405433 0 0 3 0x40014200 bored softclock 82618 111990 0 0 3 0x40014200 idle0 25430 483826 0 0 3 0x14200 bored smr 1 378340 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 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 70 11K 12K 78643K 850 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 3013K 3077K 78643K 1668 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 4361 0 4361 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 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 5506 0 5476 7 2 5 7 0 8 0 mtagpl 80 2 0 2 1 1 0 1 0 8 0 mbufpl 256 9576 0 9492 9 2 7 7 0 8 0 bufpl 280 3648 0 161 250 0 250 250 0 8 0 anonpl 16 20461 0 19009 15 2 13 13 0 107 6 amapchunkpl 152 750 0 689 5 0 5 5 0 158 2 amappl16 192 140 0 112 2 0 2 2 0 8 0 amappl15 184 2 0 0 1 0 1 1 0 8 0 amappl14 176 5 0 4 2 1 1 1 0 8 0 amappl13 168 18 0 17 1 0 1 1 0 8 0 amappl12 160 12 0 10 1 0 1 1 0 8 0 amappl11 152 57 0 45 1 0 1 1 0 8 0 amappl10 144 14 0 9 1 0 1 1 0 8 0 amappl9 136 204 0 202 1 0 1 1 0 8 0 amappl8 128 234 0 228 1 0 1 1 0 8 0 amappl7 120 103 0 94 1 0 1 1 0 8 0 amappl6 112 25 0 21 1 0 1 1 0 8 0 amappl5 104 171 0 161 1 0 1 1 0 8 0 amappl4 96 445 0 420 1 0 1 1 0 8 0 amappl3 88 114 0 107 1 0 1 1 0 8 0 amappl2 80 835 0 783 4 1 3 3 0 8 1 amappl1 72 13516 0 13124 27 10 17 20 0 8 8 amappl 80 427 0 402 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 6039 0 6018 1 0 1 1 0 8 0 vmmpepl 168 29102 0 28263 87 10 77 77 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 103538 0 99854 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 112 128 0 6 4 0 4 4 0 8 0 ddb>