panic: receive 1a: so 0xfffffd805e56d000, so_type 3, m 0xfffffd8061118700, m_type 0 Stopped at db_enter+0x18: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND *219091 69790 0 0 0 0 dhclient db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:398 panic(ffffffff821b762a) at panic+0x15c sys/kern/subr_prf.c:207 soreceive(fffffd805e56d000,0,ffff80001d3722e8,0,0,ffff80001d3721f4) at soreceive+0x170a sys/kern/uipc_socket.c:977 soo_read(fffffd8060880618,ffff80001d3722e8,0) at soo_read+0x53 sys/kern/sys_socket.c:70 dofilereadv(ffff80001d339758,6,ffff80001d3722e8,0,ffff80001d3723d0) at dofilereadv+0x1a1 sys/kern/sys_generic.c:237 sys_read(ffff80001d339758,ffff80001d372380,ffff80001d3723d0) at sys_read+0x83 sys/kern/sys_generic.c:157 syscall(ffff80001d372450) at syscall+0x507 sys/arch/amd64/amd64/trap.c:570 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f7ffffc6490, 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 0xfffffd805e56d000, so_type 3, m 0xfffffd8061118700, m_type 0 ddb> trace db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:398 panic(ffffffff821b762a) at panic+0x15c sys/kern/subr_prf.c:207 soreceive(fffffd805e56d000,0,ffff80001d3722e8,0,0,ffff80001d3721f4) at soreceive+0x170a sys/kern/uipc_socket.c:977 soo_read(fffffd8060880618,ffff80001d3722e8,0) at soo_read+0x53 sys/kern/sys_socket.c:70 dofilereadv(ffff80001d339758,6,ffff80001d3722e8,0,ffff80001d3723d0) at dofilereadv+0x1a1 sys/kern/sys_generic.c:237 sys_read(ffff80001d339758,ffff80001d372380,ffff80001d3723d0) at sys_read+0x83 sys/kern/sys_generic.c:157 syscall(ffff80001d372450) at syscall+0x507 sys/arch/amd64/amd64/trap.c:570 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f7ffffc6490, count: -8 ddb> show registers rdi 0 rsi 0x1 rbp 0xffff80001d372030 rbx 0xffff80001d3720e0 rdx 0x2 rcx 0x1 rax 0x1 r8 0xffff80001d371ff0 r9 0x1 r10 0xa4fee87107f5fddd r11 0x94c59dc6d25f8f2f r12 0x3000000008 r13 0xffff80001d372040 r14 0x100 r15 0x1 rip 0xffffffff81704528 db_enter+0x18 cs 0x8 rflags 0x246 rsp 0xffff80001d372020 ss 0x10 db_enter+0x18: addq $0x8,%rsp ddb> show proc PROC (dhclient) pid=219091 stat=onproc flags process=0 proc=0 pri=24, usrpri=50, nice=20 forw=0xffffffffffffffff, list=0xffff80001d33a388,0xffff80001d339c48 process=0xffff8000ffffa390 user=0xffff80001d36d000, 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 64050 207689 91529 0 3 0x82 thrsleep syz-execprog 64050 44284 91529 0 3 0x4000082 thrsleep syz-execprog 64050 133876 91529 0 3 0x4000082 thrsleep syz-execprog 64050 440019 91529 0 3 0x4000082 thrsleep syz-execprog 64050 255008 91529 0 3 0x4000082 wait syz-execprog 64050 178661 91529 0 3 0x4000082 kqread syz-execprog 64050 405532 91529 0 3 0x4000082 thrsleep syz-execprog 91529 90027 27350 0 3 0x10008a pause ksh 27350 272901 38438 0 3 0x92 select sshd 24563 407340 1 0 3 0x100083 ttyin getty 38438 278509 1 0 3 0x80 select sshd 16481 56695 95805 73 3 0x100090 kqread syslogd 95805 348525 1 0 3 0x100082 netio syslogd 66881 7171 1 77 2 0x100010 dhclient *69790 219091 1 0 7 0 dhclient 64071 480610 0 0 3 0x14200 pgzero zerothread 524 282975 0 0 3 0x14200 aiodoned aiodoned 43963 32779 0 0 3 0x14200 syncer update 41505 324527 0 0 3 0x14200 cleaner cleaner 3339 179557 0 0 3 0x14200 reaper reaper 74299 209191 0 0 3 0x14200 pgdaemon pagedaemon 26269 489514 0 0 3 0x14200 bored crynlk 85274 521451 0 0 3 0x14200 bored crypto 53126 271523 0 0 3 0x40014200 acpi0 acpi0 52093 84079 0 0 2 0x14200 softnet 42893 199230 0 0 2 0x14200 systqmp 7719 470414 0 0 3 0x14200 bored systq 82080 297429 0 0 3 0x40014200 bored softclock 13726 339669 0 0 3 0x40014200 idle0 10510 396383 0 0 3 0x14200 bored smr 1 295839 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 68 11K 11K 78643K 840 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 1667 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 256 145 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 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 4364 0 4364 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 5511 0 5478 8 3 5 8 0 8 0 mtagpl 80 2 0 2 1 1 0 1 0 8 0 mbufpl 256 9592 0 9505 10 3 7 7 0 8 0 bufpl 280 3649 0 161 250 0 250 250 0 8 0 anonpl 16 20255 0 18810 15 2 13 13 0 107 7 amapchunkpl 152 714 0 653 5 0 5 5 0 158 1 amappl16 192 128 0 103 2 0 2 2 0 8 0 amappl15 184 3 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 7 0 4 1 0 1 1 0 8 0 amappl11 152 58 0 46 1 0 1 1 0 8 0 amappl10 144 10 0 7 1 0 1 1 0 8 0 amappl9 136 206 0 204 1 0 1 1 0 8 0 amappl8 128 232 0 225 1 0 1 1 0 8 0 amappl7 120 104 0 94 1 0 1 1 0 8 0 amappl6 112 25 0 22 1 0 1 1 0 8 0 amappl5 104 168 0 159 1 0 1 1 0 8 0 amappl4 96 444 0 417 1 0 1 1 0 8 0 amappl3 88 112 0 106 1 0 1 1 0 8 0 amappl2 80 834 0 781 3 0 3 3 0 8 1 amappl1 72 13602 0 13219 28 12 16 20 0 8 8 amappl 80 419 0 394 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 6032 0 6012 1 0 1 1 0 8 0 vmmpepl 168 28955 0 28125 84 8 76 76 0 357 37 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 103363 0 99681 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 8 4 0 4 4 0 8 0 ddb>