panic: receive 3: so 0xffffff0007155a80, so_type 1, m 0xffffff003e96a800, m_type 6 Stopped at db_enter+0xa: popq %rbp TID PID UID PRFLAGS PFLAGS CPU COMMAND * 8155 19529 0 0 0x4000000 0 syz-executor1 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,ffffff0007155a80,ffff800014ae1f30,35,ffff800014ae1fc0,840) at soreceive+0x1288 sys/kern/uipc_socket.c:933 recvit(ffff800014ae1ff0,ffff800014ae20f8,ffff800014ae20e0,ffff8000ffffd2c8,0) at recvit+0x28c sys/kern/uipc_syscalls.c:822 sys_recvmsg(ffff800014ae2180,ffff8000ffffd2c8,ffff800014a16300) at sys_recvmsg+0x120 sys/kern/uipc_syscalls.c:758 syscall(0) at syscall+0x3e4 Xsyscall(6,0,ffffffffffffffc1,0,3,a0be1417010) at Xsyscall+0x128 end of kernel end trace frame: 0xa0eaaee0120, 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 0xffffff0007155a80, so_type 1, m 0xffffff003e96a800, 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,ffffff0007155a80,ffff800014ae1f30,35,ffff800014ae1fc0,840) at soreceive+0x1288 sys/kern/uipc_socket.c:933 recvit(ffff800014ae1ff0,ffff800014ae20f8,ffff800014ae20e0,ffff8000ffffd2c8,0) at recvit+0x28c sys/kern/uipc_syscalls.c:822 sys_recvmsg(ffff800014ae2180,ffff8000ffffd2c8,ffff800014a16300) at sys_recvmsg+0x120 sys/kern/uipc_syscalls.c:758 syscall(0) at syscall+0x3e4 Xsyscall(6,0,ffffffffffffffc1,0,3,a0be1417010) at Xsyscall+0x128 end of kernel end trace frame: 0xa0eaaee0120, count: -7 ddb> show registers rdi 0xffffffff81e23fa0 kprintf_mutex rsi 0xffffffff810ca2b9 db_enter+0x9 rbp 0xffff800014ae1d80 rbx 0xffff800014ae1e20 rdx 0xffff800000acb000 rcx 0x2637 __ALIGN_SIZE+0x1637 rax 0xffff800000acb000 r8 0xffff800014ae1d50 r9 0 r10 0x9f5175d9edf70adf r11 0xffffffff81101be0 x86_bus_space_io_read_1 r12 0x3000000008 r13 0xffff800014ae1d90 r14 0x100 r15 0xffffffff81bbfbba cmd0646_9_tim_udma+0x530d rip 0xffffffff810ca2ba db_enter+0xa cs 0x8 rflags 0x202 rsp 0xffff800014ae1d80 ss 0x10 db_enter+0xa: popq %rbp ddb> show proc PROC (syz-executor1) pid=8155 stat=onproc flags process=0 proc=4000000 pri=24, usrpri=81, nice=20 forw=0xffffffffffffffff, list=0xffff8000ffffd778,0xffff8000ffffc4c8 process=0xffff800014a16300 user=0xffff800014add000, vmspace=0xffffff003f12c318 estcpu=31, cpticks=0, pctcpu=0.0 user=0, sys=0, intr=0 ddb> ps PID TID PPID UID S FLAGS WAIT COMMAND 19529 302410 3343 0 2 0 syz-executor1 *19529 8155 3343 0 7 0x4000000 syz-executor1 19529 205375 3343 0 3 0x4000080 netlck syz-executor1 19529 254028 3343 0 2 0x4000000 syz-executor1 38211 352652 1 0 3 0x100083 ttyin getty 2138 139975 0 0 3 0x14200 bored sosplice 98880 377561 23705 0 3 0x82 piperd syz-executor0 3343 6674 23705 0 3 0x82 nanosleep syz-executor1 23705 357854 71947 0 3 0x82 thrsleep syz-fuzzer 23705 170682 71947 0 3 0x4000082 thrsleep syz-fuzzer 23705 211536 71947 0 3 0x4000082 thrsleep syz-fuzzer 23705 396901 71947 0 3 0x4000082 kqread syz-fuzzer 23705 38695 71947 0 3 0x4000082 thrsleep syz-fuzzer 23705 499369 71947 0 3 0x4000082 thrsleep syz-fuzzer 23705 57736 71947 0 3 0x4000082 thrsleep syz-fuzzer 71947 257649 76389 0 3 0x10008a pause ksh 76389 142362 53134 0 3 0x92 select sshd 53134 211313 1 0 3 0x80 select sshd 28643 272744 83294 73 3 0x100090 kqread syslogd 83294 28654 1 0 3 0x100082 netio syslogd 20932 347769 1 77 3 0x100090 poll dhclient 54319 427985 1 0 3 0x80 poll dhclient 40130 145494 0 0 3 0x14200 pgzero zerothread 56712 432286 0 0 3 0x14200 aiodoned aiodoned 83201 283957 0 0 3 0x14200 syncer update 34726 30674 0 0 3 0x14200 cleaner cleaner 69152 465899 0 0 3 0x14200 reaper reaper 45683 301872 0 0 3 0x14200 pgdaemon pagedaemon 48585 194019 0 0 3 0x14200 bored crynlk 6356 32212 0 0 3 0x14200 bored crypto 81994 156741 0 0 3 0x40014200 acpi0 acpi0 87343 75927 0 0 3 0x14200 bored softnet 66370 48900 0 0 3 0x14200 bored systqmp 84811 295051 0 0 3 0x14200 bored systq 35317 186663 0 0 3 0x40014200 bored softclock 80034 50342 0 0 3 0x40014200 idle0 1 324296 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper