panic: pool_do_get: fdescpl free list modified: page 0xfffffd8067ff9000; item addr 0xfffffd8067ff9da0; offset 0x48=0xdeafbeaf Stopped at db_enter+0x1c: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND *337742 37169 0 0x2 0 0K syz-executor.5 223233 42356 0 0x14000 0x200 1 reaper db_enter() at db_enter+0x1c sys/arch/amd64/amd64/db_interface.c:437 panic(ffffffff828e7339) at panic+0x17b sys/kern/subr_prf.c:198 pool_do_get(ffffffff82e61578,9,ffff800033f46398) at pool_do_get+0x484 sys/kern/subr_pool.c:739 pool_get(ffffffff82e61578,9) at pool_get+0xed sys/kern/subr_pool.c:582 fdcopy(ffff8000fffe4d80) at fdcopy+0x48 fdinit sys/kern/kern_descrip.c:1067 [inline] fdcopy(ffff8000fffe4d80) at fdcopy+0x48 sys/kern/kern_descrip.c:1106 process_new(ffff8000306d42a0,ffff8000fffe4d80,1) at process_new+0x390 sys/kern/kern_fork.c:273 fork1(ffff8000306d4548,1,ffffffff8263d530,0,ffff800033f465f0,0) at fork1+0x318 sys/kern/kern_fork.c:399 syscall(ffff800033f466a0) at syscall+0x5f0 mi_syscall sys/sys/syscall_mi.h:183 [inline] syscall(ffff800033f466a0) at syscall+0x5f0 sys/arch/amd64/amd64/trap.c:591 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7321f6d047c0, count: 6 https://www.openbsd.org/ddb.html describes the minimum info required in bug reports. Insufficient info makes it difficult to find and fix bugs.