panic: receive 3: so 0xffffff00698ca378, so_type 1, m 0xffffff006ee81d00, m_type 6 Stopped at db_enter+0xa: popq %rbp TID PID UID PRFLAGS PFLAGS CPU COMMAND 238809 65968 65534 0x10 0 0 syz-executor1 *172858 65968 65534 0x10 0x4000000 1K 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,ffffff00698ca378,ffff8000211cdbd0,8,ffff8000211cdc60,ffffff00698ca378) at soreceive+0x12d8 sys/kern/uipc_socket.c:933 recvit(ffff8000211cdc90,ffff8000211cdd98,ffff8000211cdd80,ffff800021084260,0) at recvit+0x28d sys/kern/uipc_syscalls.c:822 sys_recvmsg(1b0,ffff800021084260,1) 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,ffffffffffffffc1,0,3,9283fea010) at Xsyscall+0x128 end of kernel end trace frame: 0x94a8445f30, 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 0xffffff00698ca378, so_type 1, m 0xffffff006ee81d00, 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,ffffff00698ca378,ffff8000211cdbd0,8,ffff8000211cdc60,ffffff00698ca378) at soreceive+0x12d8 sys/kern/uipc_socket.c:933 recvit(ffff8000211cdc90,ffff8000211cdd98,ffff8000211cdd80,ffff800021084260,0) at recvit+0x28d sys/kern/uipc_syscalls.c:822 sys_recvmsg(1b0,ffff800021084260,1) 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,ffffffffffffffc1,0,3,9283fea010) at Xsyscall+0x128 end of kernel end trace frame: 0x94a8445f30, count: -7 ddb{1}> show registers rdi 0xffffffff81e53648 kprintf_mutex rsi 0xffffffff81711a99 db_enter+0x9 rbp 0xffff8000211cda20 rbx 0xffff8000211cdac0 rdx 0xffff800000ad6000 rcx 0x2953 __ALIGN_SIZE+0x1953 rax 0xffff800000ad6000 r8 0xffff8000211cd9f0 r9 0x1 r10 0 r11 0xffffffff811c6fd0 x86_bus_space_io_read_1 r12 0x3000000008 r13 0xffff8000211cda30 r14 0x100 r15 0xffffffff81bdb0e7 cmd0646_9_tim_udma+0x27ed rip 0xffffffff81711a9a db_enter+0xa cs 0x8 rflags 0x206 rsp 0xffff8000211cda20 ss 0x10 db_enter+0xa: popq %rbp ddb{1}> show proc PROC (syz-executor1) pid=172858 stat=onproc flags process=10 proc=4000000 pri=24, usrpri=77, nice=20 forw=0xffffffffffffffff, list=0xffff800021084bc0,0xffff800021084018 process=0xffff8000210b6990 user=0xffff8000211c8000, vmspace=0xffffff00727ba118 estcpu=27, cpticks=1, pctcpu=0.0 user=0, sys=1, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 65968 238809 22896 65534 7 0x10 syz-executor1 *65968 172858 22896 65534 7 0x4000010 syz-executor1 65968 43540 22896 65534 3 0x4000090 netlck syz-executor1 65968 361226 22896 65534 2 0x4000010 syz-executor1 65968 419376 22896 65534 2 0x4000010 syz-executor1 22896 100928 51104 65534 3 0x90 nanosleep syz-executor1 51104 469953 15583 0 3 0x82 wait syz-executor1 88753 12348 64318 65534 3 0x90 piperd syz-executor0 64318 516683 15583 0 3 0x82 wait syz-executor0 25829 337380 0 0 3 0x14200 bored sosplice 15583 496190 55967 0 3 0x82 thrsleep syz-fuzzer 15583 51245 55967 0 3 0x4000082 thrsleep syz-fuzzer 15583 270159 55967 0 3 0x4000082 thrsleep syz-fuzzer 15583 358198 55967 0 3 0x4000082 thrsleep syz-fuzzer 15583 374372 55967 0 3 0x4000082 thrsleep syz-fuzzer 15583 168615 55967 0 3 0x4000082 thrsleep syz-fuzzer 15583 378441 55967 0 3 0x4000082 thrsleep syz-fuzzer 15583 77067 55967 0 3 0x4000082 thrsleep syz-fuzzer 15583 191109 55967 0 3 0x4000082 kqread syz-fuzzer 15583 116228 55967 0 3 0x4000082 thrsleep syz-fuzzer 15583 459299 55967 0 3 0x4000082 thrsleep syz-fuzzer 15583 307837 55967 0 3 0x4000082 thrsleep syz-fuzzer 55967 492365 1697 0 3 0x10008a pause ksh 1697 300644 96392 0 3 0x92 select sshd 35872 451546 1 0 3 0x100083 ttyin getty 96392 129962 1 0 3 0x80 select sshd 34159 81555 48517 73 3 0x100090 kqread syslogd 48517 298904 1 0 3 0x100082 netio syslogd 8927 461314 1 77 3 0x100090 poll dhclient 61623 47896 1 0 3 0x80 poll dhclient 55116 71120 0 0 3 0x14200 pgzero zerothread 11607 485595 0 0 3 0x14200 aiodoned aiodoned 89344 307336 0 0 3 0x14200 syncer update 95101 32337 0 0 3 0x14200 cleaner cleaner 32766 141126 0 0 3 0x14200 reaper reaper 99850 333034 0 0 3 0x14200 pgdaemon pagedaemon 64162 393624 0 0 3 0x14200 bored crynlk 8737 273448 0 0 3 0x14200 bored crypto 75990 49431 0 0 3 0x40014200 acpi0 acpi0 50852 296332 0 0 3 0x40014200 idle1 99218 90956 0 0 3 0x14200 bored softnet 23604 500412 0 0 3 0x14200 bored systqmp 57954 380919 0 0 3 0x14200 bored systq 64745 67984 0 0 3 0x40014200 bored softclock 10824 486525 0 0 3 0x40014200 idle0 1 10195 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper