panic: receive 3: so 0xffffff007e8a4490, so_type 1, m 0xffffff007ea4eb00, m_type 6 Stopped at db_enter+0xa: popq %rbp TID PID UID PRFLAGS PFLAGS CPU COMMAND 92547 74118 65534 0x10 0 0 syz-executor0 * 48537 74118 65534 0x10 0x4000000 1K 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,ffffff007e8a4490,ffff8000211895a0,21e5,ffff800021189630,ffffff007e8a4490) at soreceive+0x12d8 sys/kern/uipc_socket.c:933 recvit(ffff800021189660,ffff800021189768,ffff800021189750,ffff8000210a2bd0,0) at recvit+0x28d sys/kern/uipc_syscalls.c:822 sys_recvmsg(1b0,ffff8000210a2bd0,1) at sys_recvmsg+0x120 sys/kern/uipc_syscalls.c:758 syscall(0) at syscall+0x489 mi_syscall sys/sys/syscall_mi.h:99 [inline] syscall(0) at syscall+0x489 sys/arch/amd64/amd64/trap.c:583 Xsyscall(6,0,ffffffffffffffc1,0,3,d95fb748010) at Xsyscall+0x128 end of kernel end trace frame: 0xd9812b29920, 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{1}> ddb{1}> set $lines = 0 ddb{1}> show panic receive 3: so 0xffffff007e8a4490, so_type 1, m 0xffffff007ea4eb00, m_type 6 ddb{1}> 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,ffffff007e8a4490,ffff8000211895a0,21e5,ffff800021189630,ffffff007e8a4490) at soreceive+0x12d8 sys/kern/uipc_socket.c:933 recvit(ffff800021189660,ffff800021189768,ffff800021189750,ffff8000210a2bd0,0) at recvit+0x28d sys/kern/uipc_syscalls.c:822 sys_recvmsg(1b0,ffff8000210a2bd0,1) at sys_recvmsg+0x120 sys/kern/uipc_syscalls.c:758 syscall(0) at syscall+0x489 mi_syscall sys/sys/syscall_mi.h:99 [inline] syscall(0) at syscall+0x489 sys/arch/amd64/amd64/trap.c:583 Xsyscall(6,0,ffffffffffffffc1,0,3,d95fb748010) at Xsyscall+0x128 end of kernel end trace frame: 0xd9812b29920, count: -7 ddb{1}> show registers rdi 0xffffffff81e53b20 kprintf_mutex rsi 0xffffffff817b5c89 db_enter+0x9 rbp 0xffff8000211893f0 rbx 0xffff800021189490 rdx 0xffff800003adf000 rcx 0x28c7 __ALIGN_SIZE+0x18c7 rax 0xffff800003adf000 r8 0xffff8000211893c0 r9 0x1 r10 0 r11 0xffffffff81a1a540 x86_bus_space_io_read_1 r12 0x3000000008 r13 0xffff800021189400 r14 0x100 r15 0xffffffff81bdbae3 cmd0646_9_tim_udma+0x5d66 rip 0xffffffff817b5c8a db_enter+0xa cs 0x8 rflags 0x202 rsp 0xffff8000211893f0 ss 0x10 db_enter+0xa: popq %rbp ddb{1}> show proc PROC (syz-executor0) pid=48537 stat=onproc flags process=10 proc=4000000 pri=24, usrpri=74, nice=20 forw=0xffffffffffffffff, list=0xffff8000210a2270,0xffff8000210a24d8 process=0xffff8000210ca990 user=0xffff800021184000, vmspace=0xffffff0065907e78 estcpu=24, cpticks=1, pctcpu=0.0 user=0, sys=1, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 74118 92547 65419 65534 7 0x10 syz-executor0 *74118 48537 65419 65534 7 0x4000010 syz-executor0 74118 75813 65419 65534 2 0x4000010 syz-executor0 56835 147274 44378 65534 3 0x90 piperd syz-executor1 44378 167386 73050 0 3 0x82 wait syz-executor1 65419 328551 65443 65534 3 0x90 nanosleep syz-executor0 65443 266123 73050 0 3 0x82 wait syz-executor0 99548 190852 0 0 3 0x14200 bored sosplice 73050 48069 19821 0 3 0x82 thrsleep syz-fuzzer 73050 407334 19821 0 3 0x4000082 thrsleep syz-fuzzer 73050 289835 19821 0 3 0x4000082 thrsleep syz-fuzzer 73050 288625 19821 0 3 0x4000082 kqread syz-fuzzer 73050 165036 19821 0 3 0x4000082 thrsleep syz-fuzzer 73050 168031 19821 0 3 0x4000082 thrsleep syz-fuzzer 73050 463283 19821 0 3 0x4000082 thrsleep syz-fuzzer 73050 330163 19821 0 3 0x4000082 thrsleep syz-fuzzer 73050 147568 19821 0 3 0x4000082 thrsleep syz-fuzzer 73050 253256 19821 0 3 0x4000082 thrsleep syz-fuzzer 19821 14146 13269 0 3 0x10008a pause ksh 13269 78736 9005 0 3 0x92 select sshd 6137 224184 1 0 3 0x100083 ttyin getty 9005 14895 1 0 3 0x80 select sshd 37901 490676 9518 73 3 0x100090 kqread syslogd 9518 415382 1 0 3 0x100082 netio syslogd 70817 293959 1 77 3 0x100090 poll dhclient 36355 242865 1 0 3 0x80 poll dhclient 94420 204862 0 0 3 0x14200 pgzero zerothread 78768 394783 0 0 3 0x14200 aiodoned aiodoned 86779 385904 0 0 3 0x14200 syncer update 48855 382260 0 0 3 0x14200 cleaner cleaner 87017 33783 0 0 3 0x14200 reaper reaper 87512 73235 0 0 3 0x14200 pgdaemon pagedaemon 54699 222310 0 0 3 0x14200 bored crynlk 2649 87326 0 0 3 0x14200 bored crypto 19943 63247 0 0 3 0x40014200 acpi0 acpi0 31958 519168 0 0 3 0x40014200 idle1 21402 226355 0 0 3 0x14200 bored softnet 89757 247584 0 0 3 0x14200 bored systqmp 80015 162482 0 0 3 0x14200 bored systq 32109 67316 0 0 3 0x40014200 bored softclock 55964 23456 0 0 3 0x40014200 idle0 1 271633 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper