panic(ffffffff8219c820) at panic+0x15c sys/kern/subr_prf.c:207 soreceive(fffffd805e55a4b0,0,ffff80001d381f18,0,0,ffff80001d381e24) at soreceive+0x170a sys/kern/uipc_socket.c:977 soo_read(fffffd806670d708,ffff80001d381f18,0) at soo_read+0x53 sys/kern/sys_socket.c:70 dofilereadv(ffff80001d349008,6,ffff80001d381f18,0,ffff80001d382000) at dofilereadv+0x1a2 sys/kern/sys_generic.c:236 sys_read(ffff80001d349008,ffff80001d381fb0,ffff80001d382000) at sys_read+0x83 sys/kern/sys_generic.c:156 syscall(ffff80001d382080) at syscall+0x507 sys/arch/amd64/amd64/trap.c:570 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f7fffffa2e0, 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 0xfffffd805e55a4b0, so_type 3, m 0xfffffd805a440200, m_type 0 ddb> trace db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:398 panic(ffffffff8219c820) at panic+0x15c sys/kern/subr_prf.c:207 soreceive(fffffd805e55a4b0,0,ffff80001d381f18,0,0,ffff80001d381e24) at soreceive+0x170a sys/kern/uipc_socket.c:977 soo_read(fffffd806670d708,ffff80001d381f18,0) at soo_read+0x53 sys/kern/sys_socket.c:70 dofilereadv(ffff80001d349008,6,ffff80001d381f18,0,ffff80001d382000) at dofilereadv+0x1a2 sys/kern/sys_generic.c:236 sys_read(ffff80001d349008,ffff80001d381fb0,ffff80001d382000) at sys_read+0x83 sys/kern/sys_generic.c:156 syscall(ffff80001d382080) at syscall+0x507 sys/arch/amd64/amd64/trap.c:570 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f7fffffa2e0, count: -8 ddb> show registers rdi 0 rsi 0x1 rbp 0xffff80001d381c60 rbx 0xffff80001d381d10 rdx 0x2 rcx 0 rax 0 r8 0xffff80001d381c20 r9 0x1 r10 0 r11 0xcd7e02555594f61d r12 0x3000000008 r13 0xffff80001d381c70 r14 0x100 r15 0x1 rip 0xffffffff81edc2b8 db_enter+0x18 cs 0x8 rflags 0x246 rsp 0xffff80001d381c50 ss 0x10 db_enter+0x18: addq $0x8,%rsp ddb> show proc PROC (dhclient) pid=136474 stat=onproc flags process=0 proc=0 pri=53, usrpri=53, nice=20 forw=0xffffffffffffffff, list=0xffff80001d349ea8,0xffff80001d349288 process=0xffff8000ffffa390 user=0xffff80001d37d000, vmspace=0xfffffd806bc09880 estcpu=3, cpticks=13, pctcpu=0.0 user=0, sys=13, intr=0 ddb> ps PID TID PPID UID S FLAGS WAIT COMMAND 34644 474902 4779 0 2 0 syz-executor.1 34644 69490 4779 0 3 0x4000000 smrbar syz-executor.1 12809 59636 0 0 3 0x14200 bored sosplice 29228 393234 67471 0 2 0x2 syz-executor.0 4779 475080 67471 0 2 0x482 syz-executor.1 67471 452019 29100 0 3 0x82 thrsleep syz-fuzzer 67471 260120 29100 0 2 0x4000482 syz-fuzzer 67471 424787 29100 0 3 0x4000082 thrsleep syz-fuzzer 67471 402611 29100 0 3 0x4000082 thrsleep syz-fuzzer 67471 492366 29100 0 3 0x4000082 kqread syz-fuzzer 67471 6066 29100 0 3 0x4000082 thrsleep syz-fuzzer 67471 104067 29100 0 3 0x4000082 thrsleep syz-fuzzer 67471 208906 29100 0 2 0x4000482 syz-fuzzer 29100 211322 22848 0 3 0x10008a pause ksh 22848 22277 99224 0 3 0x92 select sshd 54978 515733 1 0 3 0x100083 ttyin getty 99224 271579 1 0 3 0x80 select sshd 30883 156590 93934 73 3 0x100090 kqread syslogd 93934 120216 1 0 3 0x100082 netio syslogd 69376 182650 1 77 2 0x100010 dhclient * 8037 136474 1 0 7 0 dhclient 26571 322400 0 0 2 0x14200 zerothread 41814 115934 0 0 3 0x14200 aiodoned aiodoned 87627 208669 0 0 3 0x14200 syncer update 80480 490644 0 0 3 0x14200 cleaner cleaner 96607 470456 0 0 3 0x14200 reaper reaper 26549 464809 0 0 3 0x14200 pgdaemon pagedaemon 42528 449048 0 0 3 0x14200 bored crynlk 54156 184275 0 0 3 0x14200 bored crypto 3290 118275 0 0 3 0x40014200 acpi0 acpi0 11106 345470 0 0 2 0x14200 softnet 81071 78806 0 0 3 0x14200 bored systqmp 90813 45555 0 0 3 0x14200 bored systq 43423 187041 0 0 2 0x40014200 softclock 96560 160174 0 0 3 0x40014200 idle0 58302 523332 0 0 2 0x14200 smr 1 191363 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 9478 6343K 6972K 78643K 12049 0 pcb 13 8K 8K 78643K 57 0 rtable 113 3K 3K 78643K 248 0 ifaddr 62 13K 13K 78643K 73 0 counters 22 16K 16K 78643K 22 0 ioctlops 0 0K 2K 78643K 21 0 iov 0 0K 16K 78643K 33 0 mount 1 1K 1K 78643K 1 0 vnodes 1221 77K 77K 78643K 1790 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 39 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1794 195K 288K 78643K 12646 0 file desc 5 13K 25K 78643K 458 0 sigio 0 0K 0K 78643K 4 0 proc 50 38K 54K 78643K 385 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 26 0 in_multi 46 2K 2K 78643K 67 0 ether_multi 1 0K 0K 78643K 9 0 mrt 0 0K 0K 78643K 5 0 ISOFS mount 1 32K 32K 78643K 1 0 MSDOSFS mount 1 16K 16K 78643K 1 0 ttys 49 228K 228K 78643K 49 0 exec 0 0K 1K 78643K 193 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 107 21K 22K 78643K 1949 0 UVM aobj 19 2K 2K 78643K 19 0 memdesc 1 4K 4K 78643K 1 0 crypto data 1 1K 1K 78643K 1 0 ip6_options 0 0K 0K 78643K 41 0 NDP 9 0K 0K 78643K 13 0 temp 119 3014K 3078K 78643K 7513 0 kqueue 3 4K 14K 78643K 19 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 10 0 2 1 0 1 1 0 8 0 rtpcb 80 31 0 29 1 0 1 1 0 8 0 rtentry 112 59 0 11 2 0 2 2 0 8 0 unpcb 120 221 0 213 1 0 1 1 0 8 0 syncache 264 10 0 10 4 3 1 1 0 8 1 tcpcb 544 90 0 86 1 0 1 1 0 8 0 ipq 40 2 0 2 1 0 1 1 0 8 1 ipqe 40 4 0 4 1 0 1 1 0 8 1 inpcb 280 246 0 237 2 1 1 2 0 8 0 rttmr 72 2 0 2 2 2 0 1 0 8 0 nd6 48 4 0 0 1 0 1 1 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 251 0 28 16 2 14 16 0 8 0 art_table 32 252 0 28 2 0 2 2 0 8 0 art_node 16 56 0 12 1 0 1 1 0 8 0 sysvmsgpl 40 86 0 46 1 0 1 1 0 8 0 semapl 112 37 0 27 1 0 1 1 0 8 0 shmpl 112 17 0 0 1 0 1 1 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino1pl 128 2125 0 725 46 0 46 46 0 8 0 ffsino 240 2125 0 725 83 0 83 83 0 8 0 nchpl 144 3114 0 1501 60 0 60 60 0 8 0 uvmvnodes 72 2605 0 0 48 0 48 48 0 8 0 vnodes 208 2605 0 0 138 0 138 138 0 8 0 namei 1024 8328 0 8328 1 0 1 1 0 8 1 scxspl 192 8080 0 8080 1 0 1 1 0 8 1 plimitpl 152 32 0 25 1 0 1 1 0 8 0 sigapl 432 629 0 616 2 0 2 2 0 8 0 futexpl 56 8771 0 8771 1 0 1 1 0 8 1 knotepl 112 72 0 53 1 0 1 1 0 8 0 kqueuepl 104 54 0 52 1 0 1 1 0 8 0 pipelkpl 16 113 0 103 1 0 1 1 0 8 0 pipepl 120 226 0 207 1 0 1 1 0 8 0 fdescpl 432 630 0 616 2 0 2 2 0 8 0 filepl 120 3826 0 3731 5 1 4 5 0 8 1 lockfpl 104 102 0 101 1 0 1 1 0 8 0 lockfspl 48 34 0 33 1 0 1 1 0 8 0 sessionpl 112 17 0 7 1 0 1 1 0 8 0 pgrppl 48 21 0 11 1 0 1 1 0 8 0 ucredpl 96 316 0 308 1 0 1 1 0 8 0 zombiepl 144 616 0 616 1 0 1 1 0 8 1 processpl 896 645 0 616 4 0 4 4 0 8 0 procpl 624 1258 0 1221 4 0 4 4 0 8 1 sosppl 128 2 0 2 1 1 0 1 0 8 0 sockpl 400 499 0 482 6 2 4 4 0 8 2 mcl64k 65536 17 0 17 3 2 1 1 0 8 1 mcl16k 16384 2 0 2 2 2 0 1 0 8 0 mcl12k 12288 8 0 8 3 2 1 1 0 8 1 mcl9k 9216 3 0 3 2 1 1 1 0 8 1 mcl8k 8192 13 0 13 2 1 1 1 0 8 1 mcl4k 4096 42 0 42 2 1 1 1 0 8 1 mcl2k2 2112 1 0 1 1 1 0 1 0 8 0 mcl2k 2048 64957 0 64914 20 13 7 16 0 8 1 mtagpl 80 13 0 2 2 1 1 1 0 8 0 mbufpl 256 105009 0 104868 15 5 10 10 0 8 0 bufpl 280 4674 0 181 321 0 321 321 0 8 0 anonpl 16 62599 0 46017 69 1 68 68 0 107 0 amapchunkpl 152 2662 0 2530 10 4 6 10 0 158 0 amappl16 192 2755 0 1847 47 1 46 47 0 8 0 amappl15 184 50 0 46 1 0 1 1 0 8 0 amappl14 176 26 0 24 1 0 1 1 0 8 0 amappl12 160 158 0 156 2 1 1 1 0 8 0 amappl11 152 324 0 310 1 0 1 1 0 8 0 amappl10 144 14 0 12 1 0 1 1 0 8 0 amappl9 136 563 0 559 1 0 1 1 0 8 0 amappl8 128 112 0 89 1 0 1 1 0 8 0 amappl7 120 89 0 79 1 0 1 1 0 8 0 amappl6 112 324 0 318 1 0 1 1 0 8 0 amappl5 104 297 0 286 1 0 1 1 0 8 0 amappl4 96 688 0 661 1 0 1 1 0 8 0 amappl3 88 317 0 309 1 0 1 1 0 8 0 amappl2 80 4251 0 4183 3 1 2 3 0 8 0 amappl1 72 20345 0 19926 26 16 10 20 0 8 0 amappl 80 1474 0 1433 4 3 1 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 18 0 0 1 0 1 1 0 8 0 uaddrrnd 24 630 0 616 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 630 0 616 1 0 1 1 0 8 0 vmmpekpl 168 7694 0 7669 2 0 2 2 0 8 0 vmmpepl 168 80271 0 78270 116 23 93 108 0 357 5 vmsppl 272 629 0 616 2 1 1 2 0 8 0 pdppl 4096 1266 0 1232 6 1 5 6 0 8 0 pvpl 32 199789 0 180182 169 7 162 166 0 265 2 pmappl 200 629 0 616 1 0 1 1 0 8 0 extentpl 40 46 0 29 1 0 1 1 0 8 0 phpool 112 169 0 32 5 0 5 5 0 8 0