̃̃panic: receive 3: so 0xffffff0036f0bc00, so_type 1, m 0xffffff0038116d00, m_type 6 Stopped at db_enter+0xa: popq %rbp TID PID UID PRFLAGS PFLAGS CPU COMMAND * 67422 26524 0 0 0x4000000 0 syz-executor0 db_enter() at db_enter+0xa sys/arch/amd64/amd64/db_interface.c:399 panic() at panic+0x147 sys/kern/subr_prf.c:208 soreceive(0,ffffff0036f0bc00,ffff800014afd0a0,1112,ffff800014afd130,842) at soreceive+0x1288 sys/kern/uipc_socket.c:933 recvit(ffff800014afd160,ffff800014afd268,ffff800014afd250,ffff8000ffffc710,0) at recvit+0x28c sys/kern/uipc_syscalls.c:822 sys_recvmsg(ffff800014afd2f0,ffff8000ffffc710,ffff800014a16628) at sys_recvmsg+0x120 sys/kern/uipc_syscalls.c:758 syscall(0) at syscall+0x3e4 Xsyscall(6,0,ffffffffffffffc1,0,3,7580e4c3010) at Xsyscall+0x128 end of kernel end trace frame: 0x75ae9ce3db0, count: 8 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> show panic receive 3: so 0xffffff0036f0bc00, so_type 1, m 0xffffff0038116d00, m_type 6 ddb> trace db_enter() at db_enter+0xa sys/arch/amd64/amd64/db_interface.c:399 panic() at panic+0x147 sys/kern/subr_prf.c:208 soreceive(0,ffffff0036f0bc00,ffff800014afd0a0,1112,ffff800014afd130,842) at soreceive+0x1288 sys/kern/uipc_socket.c:933 recvit(ffff800014afd160,ffff800014afd268,ffff800014afd250,ffff8000ffffc710,0) at recvit+0x28c sys/kern/uipc_syscalls.c:822 sys_recvmsg(ffff800014afd2f0,ffff8000ffffc710,ffff800014a16628) at sys_recvmsg+0x120 sys/kern/uipc_syscalls.c:758 syscall(0) at syscall+0x3e4 Xsyscall(6,0,ffffffffffffffc1,0,3,7580e4c3010) at Xsyscall+0x128 end of kernel end trace frame: 0x75ae9ce3db0, count: -7 ddb> show registers rdi 0xffffffff81e142a0 kprintf_mutex rsi 0xffffffff81b0d869 db_enter+0x9 rbp 0xffff800014afcef0 rbx 0xffff800014afcf90 rdx 0xffff8000014cc000 rcx 0x2353 __ALIGN_SIZE+0x1353 rax 0xffff8000014cc000 r8 0xffff800014afcec0 r9 0 r10 0xffff800014afcd78 r11 0xffffffff81923d20 x86_bus_space_io_read_1 r12 0x3000000008 r13 0xffff800014afcf00 r14 0x100 r15 0xffffffff81bc5de3 cmd0646_9_tim_udma+0x925d rip 0xffffffff81b0d86a db_enter+0xa cs 0x8 rflags 0x206 rsp 0xffff800014afcef0 ss 0x10 db_enter+0xa: popq %rbp ddb> show proc PROC (syz-executor0) pid=67422 stat=onproc flags process=0 proc=4000000 pri=24, usrpri=67, nice=20 forw=0xffffffffffffffff, list=0xffff800014a332d0,0xffff8000ffffd080 process=0xffff800014a16628 user=0xffff800014af8000, vmspace=0xffffff003f12ca50 estcpu=17, cpticks=0, pctcpu=0.0 user=0, sys=0, intr=0 ddb> ps PID TID PPID UID S FLAGS WAIT COMMAND 26524 113914 77271 0 2 0 syz-executor0 *26524 67422 77271 0 7 0x4000000 syz-executor0 26524 458326 77271 0 3 0x4000080 netlck syz-executor0 26524 284250 77271 0 3 0x4000080 fsleep syz-executor0 26524 31738 77271 0 3 0x4000080 netlck syz-executor0 26524 236907 77271 0 2 0x4000000 syz-executor0 19902 357836 1 0 3 0x82 nanosleep getty 26260 77617 0 0 3 0x14200 bored sosplice 77271 244584 28141 0 3 0x82 nanosleep syz-executor0 10437 368259 28141 0 2 0x2 syz-executor1 28141 9289 31768 0 3 0x82 thrsleep syz-fuzzer 28141 329132 31768 0 3 0x4000082 nanosleep syz-fuzzer 28141 319192 31768 0 3 0x4000082 thrsleep syz-fuzzer 28141 26370 31768 0 3 0x4000082 thrsleep syz-fuzzer 28141 499700 31768 0 3 0x4000082 thrsleep syz-fuzzer 28141 415335 31768 0 3 0x4000082 thrsleep syz-fuzzer 28141 435072 31768 0 3 0x4000082 kqread syz-fuzzer 31768 340791 99297 0 3 0x10008a pause ksh 99297 247824 88485 0 3 0x92 select sshd 88485 270847 1 0 3 0x80 select sshd 99014 468930 23582 73 3 0x100090 kqread syslogd 23582 45003 1 0 3 0x100082 netio syslogd 71678 308016 1 77 3 0x100090 poll dhclient 73360 440419 1 0 3 0x80 poll dhclient 97060 509779 0 0 2 0x14200 zerothread 79893 236676 0 0 3 0x14200 aiodoned aiodoned 24400 406989 0 0 3 0x14200 syncer update 79576 160922 0 0 3 0x14200 cleaner cleaner 42249 450512 0 0 3 0x14200 reaper reaper 72423 381542 0 0 3 0x14200 pgdaemon pagedaemon 98490 188025 0 0 3 0x14200 bored crynlk 31855 369028 0 0 3 0x14200 bored crypto 42264 109406 0 0 3 0x40014200 acpi0 acpi0 12372 478930 0 0 2 0x14200 softnet 31718 407969 0 0 3 0x14200 bored systqmp 5395 212240 0 0 3 0x14200 bored systq 47954 473988 0 0 3 0x40014200 bored softclock 14881 248045 0 0 3 0x40014200 idle0 1 436203 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper