panic(ffffffff8218f7a4) at panic+0x15c sys/kern/subr_prf.c:207 soreceive(fffffd805e4d7480,0,ffff80001d37e798,0,0,ffff80001d37e6a4) at soreceive+0x16e7 soo_read(fffffd8066c0f438,ffff80001d37e798,0) at soo_read+0x53 sys/kern/sys_socket.c:70 dofilereadv(ffff8000ffff8c60,6,ffff80001d37e798,0,ffff80001d37e880) at dofilereadv+0x1a2 sys/kern/sys_generic.c:236 sys_read(ffff8000ffff8c60,ffff80001d37e830,ffff80001d37e880) at sys_read+0x83 sys/kern/sys_generic.c:156 syscall(ffff80001d37e900) at syscall+0x507 sys/arch/amd64/amd64/trap.c:555 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f7ffffd27c0, 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 0xfffffd805e4d7480, so_type 3, m 0xfffffd8056dc9a00, m_type 0 ddb> trace db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:398 panic(ffffffff8218f7a4) at panic+0x15c sys/kern/subr_prf.c:207 soreceive(fffffd805e4d7480,0,ffff80001d37e798,0,0,ffff80001d37e6a4) at soreceive+0x16e7 soo_read(fffffd8066c0f438,ffff80001d37e798,0) at soo_read+0x53 sys/kern/sys_socket.c:70 dofilereadv(ffff8000ffff8c60,6,ffff80001d37e798,0,ffff80001d37e880) at dofilereadv+0x1a2 sys/kern/sys_generic.c:236 sys_read(ffff8000ffff8c60,ffff80001d37e830,ffff80001d37e880) at sys_read+0x83 sys/kern/sys_generic.c:156 syscall(ffff80001d37e900) at syscall+0x507 sys/arch/amd64/amd64/trap.c:555 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f7ffffd27c0, count: -8 ddb> show registers rdi 0 rsi 0x1 rbp 0xffff80001d37e4e0 rbx 0xffff80001d37e590 rdx 0x2 rcx 0 rax 0 r8 0xffff80001d37e4a0 r9 0x1 r10 0 r11 0x2120c5c64b921da5 r12 0x3000000008 r13 0xffff80001d37e4f0 r14 0x100 r15 0x1 rip 0xffffffff81afe868 db_enter+0x18 cs 0x8 rflags 0x246 rsp 0xffff80001d37e4d0 ss 0x10 db_enter+0x18: addq $0x8,%rsp ddb> show proc PROC (dhclient) pid=88839 stat=onproc flags process=0 proc=0 pri=53, usrpri=53, nice=20 forw=0xffffffffffffffff, list=0xffff8000ffff8770,0xffff8000ffff8ee8 process=0xffff8000ffff6370 user=0xffff80001d379000, vmspace=0xfffffd806bc0a550 estcpu=3, cpticks=12, pctcpu=0.0 user=0, sys=11, intr=1 ddb> ps PID TID PPID UID S FLAGS WAIT COMMAND 76179 500852 87885 0 2 0 syz-executor.1 76179 19074 87885 0 2 0x4000000 syz-executor.1 21834 209435 76169 0 2 0 syz-executor.0 21834 330170 76169 0 2 0x4000000 syz-executor.0 62821 341121 0 0 3 0x14200 bored sosplice 76169 165309 50605 0 2 0x482 syz-executor.0 87885 379634 50605 0 2 0x482 syz-executor.1 50605 170541 71451 0 3 0x82 thrsleep syz-fuzzer 50605 54838 71451 0 3 0x4000082 thrsleep syz-fuzzer 50605 417832 71451 0 3 0x4000082 kqread syz-fuzzer 50605 304968 71451 0 3 0x4000082 thrsleep syz-fuzzer 50605 18740 71451 0 3 0x4000082 thrsleep syz-fuzzer 50605 249753 71451 0 3 0x4000082 thrsleep syz-fuzzer 50605 75853 71451 0 3 0x4000082 thrsleep syz-fuzzer 50605 174978 71451 0 3 0x4000082 thrsleep syz-fuzzer 71451 300677 94181 0 3 0x10008a pause ksh 94181 18492 83852 0 3 0x92 select sshd 65175 184183 1 0 3 0x100083 ttyin getty 83852 352050 1 0 3 0x80 select sshd 84589 108381 7981 73 3 0x100090 kqread syslogd 7981 507535 1 0 3 0x100082 netio syslogd 41944 471642 1 77 2 0x100010 dhclient *11947 88839 1 0 7 0 dhclient 12213 505057 0 0 2 0x14200 zerothread 84012 497325 0 0 3 0x14200 aiodoned aiodoned 93351 365111 0 0 3 0x14200 syncer update 11876 333489 0 0 3 0x14200 cleaner cleaner 95200 184518 0 0 3 0x14200 reaper reaper 35532 371929 0 0 3 0x14200 pgdaemon pagedaemon 81078 299130 0 0 3 0x14200 bored crynlk 31263 225938 0 0 3 0x14200 bored crypto 44450 291988 0 0 3 0x40014200 acpi0 acpi0 22601 12028 0 0 2 0x14200 softnet 82890 306500 0 0 3 0x14200 bored systqmp 79604 72006 0 0 3 0x14200 bored systq 88223 154918 0 0 2 0x40014200 softclock 84373 494557 0 0 3 0x40014200 idle0 614 414652 0 0 3 0x14200 bored smr 1 67966 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 9506 6354K 6821K 78643K 11296 0 pcb 13 8K 8K 78643K 56 0 rtable 107 4K 4K 78643K 302 0 ifaddr 82 15K 15K 78643K 106 0 counters 19 16K 16K 78643K 19 0 ioctlops 0 0K 2K 78643K 31 0 iov 0 0K 16K 78643K 49 0 mount 1 1K 1K 78643K 1 0 vnodes 1224 77K 77K 78643K 1443 0 UFS quota 1 32K 32K 78643K 1 0 UFS mount 5 36K 36K 78643K 5 0 shm 2 1K 5K 78643K 8 0 VM map 2 0K 0K 78643K 2 0 sem 12 1K 1K 78643K 74 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1794 195K 288K 78643K 12646 0 file desc 6 17K 25K 78643K 287 0 sigio 0 0K 0K 78643K 24 0 proc 50 38K 54K 78643K 379 0 subproc 32 2K 2K 78643K 34 0 NFS srvsock 1 0K 0K 78643K 1 0 NFS daemon 1 16K 16K 78643K 1 0 ip_moptions 0 0K 0K 78643K 14 0 in_multi 60 3K 3K 78643K 107 0 ether_multi 1 0K 0K 78643K 5 0 mrt 0 0K 0K 78643K 9 0 ISOFS mount 1 32K 32K 78643K 1 0 MSDOSFS mount 1 16K 16K 78643K 1 0 ttys 61 281K 281K 78643K 61 0 exec 0 0K 1K 78643K 207 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 128 91K 91K 78643K 1561 0 UVM aobj 25 2K 2K 78643K 25 0 memdesc 1 4K 4K 78643K 1 0 crypto data 1 1K 1K 78643K 1 0 ip6_options 0 0K 0K 78643K 18 0 NDP 14 0K 0K 78643K 22 0 temp 116 3001K 3069K 78643K 16413 0 kqueue 3 4K 10K 78643K 28 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 7 0 0 1 0 1 1 0 8 0 rtpcb 80 69 0 67 1 0 1 1 0 8 0 rtentry 112 67 0 25 2 0 2 2 0 8 0 unpcb 120 189 0 180 1 0 1 1 0 8 0 syncache 264 6 0 6 2 2 0 1 0 8 0 tcpqe 32 74 0 74 2 2 0 1 0 8 0 tcpcb 544 97 0 93 2 0 2 2 0 8 1 ipq 40 1 0 1 1 1 0 1 0 8 0 ipqe 40 45 0 45 1 1 0 1 0 8 0 inpcb 280 857 0 848 4 1 3 3 0 8 2 rttmr 72 4 0 4 1 0 1 1 0 8 1 nd6 48 8 0 6 1 0 1 1 0 8 0 pkpcb 40 4 0 4 1 1 0 1 0 8 0 ppxss 1128 2 0 1 2 1 1 1 0 8 0 art_heap8 4096 2 0 0 2 0 2 2 0 8 0 art_heap4 256 316 0 126 14 0 14 14 0 8 2 art_table 32 318 0 126 2 0 2 2 0 8 0 art_node 16 66 0 26 1 0 1 1 0 8 0 sysvmsgpl 40 12 0 10 2 1 1 1 0 8 0 semupl 112 2 0 2 1 1 0 1 0 8 0 semapl 112 70 0 60 1 0 1 1 0 8 0 shmpl 112 23 0 0 1 0 1 1 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino1pl 128 1807 0 406 46 0 46 46 0 8 0 ffsino 240 1807 0 406 83 0 83 83 0 8 0 nchpl 144 2390 0 777 60 0 60 60 0 8 0 uvmvnodes 72 2018 0 0 37 0 37 37 0 8 0 vnodes 208 2018 0 0 107 0 107 107 0 8 0 namei 1024 6445 0 6444 1 0 1 1 0 8 0 vcpupl 1984 7 0 0 1 0 1 1 0 8 0 vmpool 528 7 0 0 1 0 1 1 0 8 0 scxspl 192 6798 0 6798 1 0 1 1 0 8 1 plimitpl 152 36 0 29 1 0 1 1 0 8 0 sigapl 432 458 0 444 2 0 2 2 0 8 0 futexpl 56 7855 0 7855 1 0 1 1 0 8 1 knotepl 112 83 0 64 1 0 1 1 0 8 0 kqueuepl 104 83 0 81 1 0 1 1 0 8 0 pipepl 112 382 0 363 1 0 1 1 0 8 0 fdescpl 432 459 0 444 2 0 2 2 0 8 0 filepl 120 3610 0 3513 5 0 5 5 0 8 2 lockfpl 104 109 0 107 1 0 1 1 0 8 0 lockfspl 48 38 0 36 1 0 1 1 0 8 0 sessionpl 112 17 0 7 1 0 1 1 0 8 0 pgrppl 48 17 0 7 1 0 1 1 0 8 0 ucredpl 96 331 0 324 1 0 1 1 0 8 0 zombiepl 144 444 0 444 1 0 1 1 0 8 1 processpl 864 474 0 444 4 0 4 4 0 8 0 procpl 632 832 0 793 4 0 4 4 0 8 0 sosppl 128 7 0 7 2 2 0 1 0 8 0 sockpl 384 1125 0 1107 8 1 7 7 0 8 4 mcl64k 65536 26 0 26 1 0 1 1 0 8 1 mcl16k 16384 11 0 11 1 0 1 1 0 8 1 mcl12k 12288 13 0 13 1 0 1 1 0 8 1 mcl9k 9216 11 0 11 1 0 1 1 0 8 1 mcl8k 8192 30 0 30 1 0 1 1 0 8 1 mcl4k 4096 80 0 80 2 1 1 1 0 8 1 mcl2k2 2112 1 0 1 1 1 0 1 0 8 0 mcl2k 2048 59925 0 59878 16 9 7 14 0 8 0 mtagpl 80 25 0 2 2 1 1 1 0 8 0 mbufpl 256 98661 0 98456 25 3 22 23 0 8 6 bufpl 280 8294 0 1949 454 0 454 454 0 8 0 anonpl 16 62251 0 46980 82 9 73 75 0 107 11 amapchunkpl 152 2278 0 2127 16 8 8 16 0 158 1 amappl16 192 2318 0 1488 47 2 45 47 0 8 3 amappl15 184 176 0 170 1 0 1 1 0 8 0 amappl14 176 25 0 24 1 0 1 1 0 8 0 amappl13 168 1 0 1 1 1 0 1 0 8 0 amappl12 160 18 0 16 2 1 1 1 0 8 0 amappl11 152 50 0 39 1 0 1 1 0 8 0 amappl10 144 146 0 142 1 0 1 1 0 8 0 amappl9 136 553 0 550 1 0 1 1 0 8 0 amappl8 128 115 0 93 1 0 1 1 0 8 0 amappl7 120 225 0 213 1 0 1 1 0 8 0 amappl6 112 56 0 50 1 0 1 1 0 8 0 amappl5 104 165 0 153 1 0 1 1 0 8 0 amappl4 96 677 0 647 1 0 1 1 0 8 0 amappl3 88 130 0 122 1 0 1 1 0 8 0 amappl2 80 3038 0 2959 3 1 2 3 0 8 0 amappl1 72 17842 0 17417 24 14 10 20 0 8 0 amappl 80 1072 0 1019 2 0 2 2 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 24 0 0 1 0 1 1 0 8 0 uaddrrnd 24 466 0 444 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 466 0 444 1 0 1 1 0 8 0 vmmpekpl 168 7100 0 7074 2 0 2 2 0 8 0 vmmpepl 168 61729 0 59676 138 20 118 135 0 357 28 vmsppl 272 465 0 444 3 1 2 2 0 8 0 pdppl 4096 938 0 895 7 1 6 6 0 8 0 pvpl 32 219343 0 201190 242 17 225 241 0 265 78 pmappl 200 465 0 444 2 0 2 2 0 8 0 extentpl 40 46 0 29 1 0 1 1 0 8 0 phpool 112 163 0 17 5 0 5 5 0 8 0