panic: receive 1a: so 0xfffffd805e5534b0, so_type 3, m 0xfffffd805c849f00, m_type 0 Stopped at db_enter+0x18: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND * 40113 85771 0 0 0 0 dhclient db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:398 panic(ffffffff8219db7f) at panic+0x15c sys/kern/subr_prf.c:207 soreceive(fffffd805e5534b0,0,ffff80001d3824b8,0,0,ffff80001d3823c4) at soreceive+0x170a sys/kern/uipc_socket.c:977 soo_read(fffffd806648b258,ffff80001d3824b8,0) at soo_read+0x53 sys/kern/sys_socket.c:70 dofilereadv(ffff80001d349758,6,ffff80001d3824b8,0,ffff80001d3825a0) at dofilereadv+0x1a1 sys/kern/sys_generic.c:236 sys_read(ffff80001d349758,ffff80001d382550,ffff80001d3825a0) at sys_read+0x83 sys/kern/sys_generic.c:156 syscall(ffff80001d382620) at syscall+0x507 sys/arch/amd64/amd64/trap.c:570 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f7ffffebe20, 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 0xfffffd805e5534b0, so_type 3, m 0xfffffd805c849f00, m_type 0 ddb> trace db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:398 panic(ffffffff8219db7f) at panic+0x15c sys/kern/subr_prf.c:207 soreceive(fffffd805e5534b0,0,ffff80001d3824b8,0,0,ffff80001d3823c4) at soreceive+0x170a sys/kern/uipc_socket.c:977 soo_read(fffffd806648b258,ffff80001d3824b8,0) at soo_read+0x53 sys/kern/sys_socket.c:70 dofilereadv(ffff80001d349758,6,ffff80001d3824b8,0,ffff80001d3825a0) at dofilereadv+0x1a1 sys/kern/sys_generic.c:236 sys_read(ffff80001d349758,ffff80001d382550,ffff80001d3825a0) at sys_read+0x83 sys/kern/sys_generic.c:156 syscall(ffff80001d382620) at syscall+0x507 sys/arch/amd64/amd64/trap.c:570 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f7ffffebe20, count: -8 ddb> show registers rdi 0 rsi 0x1 rbp 0xffff80001d382200 rbx 0xffff80001d3822b0 rdx 0x2 rcx 0x1 rax 0x1 r8 0xffff80001d3821c0 r9 0x1 r10 0xdbfc6dda8b605d3f r11 0x79c8b71322089458 r12 0x3000000008 r13 0xffff80001d382210 r14 0x100 r15 0x1 rip 0xffffffff81ee4878 db_enter+0x18 cs 0x8 rflags 0x246 rsp 0xffff80001d3821f0 ss 0x10 db_enter+0x18: addq $0x8,%rsp ddb> show proc PROC (dhclient) pid=40113 stat=onproc flags process=0 proc=0 pri=24, usrpri=50, nice=20 forw=0xffffffffffffffff, list=0xffff80001d34a5f8,0xffff80001d3494f8 process=0xffff8000ffffa710 user=0xffff80001d37d000, vmspace=0xfffffd806bc09330 estcpu=0, cpticks=0, pctcpu=0.0 user=0, sys=0, intr=0 ddb> ps PID TID PPID UID S FLAGS WAIT COMMAND 23322 411668 70647 0 3 0x82 thrsleep syz-execprog 23322 271891 70647 0 3 0x4000082 thrsleep syz-execprog 23322 418395 70647 0 3 0x4000082 thrsleep syz-execprog 23322 410310 70647 0 3 0x4000082 thrsleep syz-execprog 23322 293642 70647 0 3 0x4000082 wait syz-execprog 23322 411096 70647 0 3 0x4000082 kqread syz-execprog 23322 208879 70647 0 3 0x4000082 thrsleep syz-execprog 70647 162580 16287 0 3 0x10008a pause ksh 16287 300371 88487 0 3 0x92 select sshd 13239 300937 1 0 3 0x100083 ttyin getty 88487 289841 1 0 3 0x80 select sshd 63029 275573 3757 73 3 0x100090 kqread syslogd 3757 495080 1 0 3 0x100082 netio syslogd 68193 227598 1 77 2 0x100010 dhclient *85771 40113 1 0 7 0 dhclient 75157 118879 0 0 3 0x14200 pgzero zerothread 35118 71030 0 0 3 0x14200 aiodoned aiodoned 96777 56647 0 0 3 0x14200 syncer update 52652 174147 0 0 3 0x14200 cleaner cleaner 53483 184235 0 0 3 0x14200 reaper reaper 441 367912 0 0 3 0x14200 pgdaemon pagedaemon 6771 413065 0 0 3 0x14200 bored crynlk 61279 147398 0 0 3 0x14200 bored crypto 77051 308397 0 0 3 0x40014200 acpi0 acpi0 40111 201472 0 0 2 0x14200 softnet 44039 136302 0 0 2 0x14200 systqmp 56988 452828 0 0 3 0x14200 bored systq 78295 313481 0 0 3 0x40014200 bored softclock 18583 36577 0 0 3 0x40014200 idle0 31428 229039 0 0 3 0x14200 bored smr 1 517903 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 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 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 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 77 11K 12K 78643K 864 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 3001K 3065K 78643K 1690 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 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 256 168 0 0 11 0 11 11 0 8 0 art_table 32 169 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 4353 0 4353 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 104 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 120 998 0 947 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 5505 0 5470 8 3 5 8 0 8 0 mtagpl 80 2 0 2 1 1 0 1 0 8 0 mbufpl 256 9547 0 9467 9 2 7 7 0 8 0 bufpl 280 3714 0 179 253 0 253 253 0 8 0 anonpl 16 20467 0 18993 14 1 13 13 0 107 6 amapchunkpl 152 714 0 653 5 0 5 5 0 158 2 amappl16 192 74 0 49 2 0 2 2 0 8 0 amappl15 184 50 0 46 1 0 1 1 0 8 0 amappl14 176 23 0 18 1 0 1 1 0 8 0 amappl12 160 10 0 7 1 0 1 1 0 8 0 amappl11 152 44 0 33 1 0 1 1 0 8 0 amappl10 144 12 0 11 1 0 1 1 0 8 0 amappl9 136 386 0 384 1 0 1 1 0 8 0 amappl8 128 84 0 73 1 0 1 1 0 8 0 amappl7 120 88 0 78 1 0 1 1 0 8 0 amappl6 112 65 0 60 1 0 1 1 0 8 0 amappl5 104 145 0 136 1 0 1 1 0 8 0 amappl4 96 425 0 402 1 0 1 1 0 8 0 amappl3 88 124 0 116 1 0 1 1 0 8 0 amappl2 80 837 0 779 3 0 3 3 0 8 1 amappl1 72 13638 0 13229 25 7 18 20 0 8 8 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 6043 0 6023 1 0 1 1 0 8 0 vmmpepl 168 29485 0 28604 82 3 79 79 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 104084 0 100356 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 112 131 0 7 4 0 4 4 0 8 0 ddb>