r0 = syz_open_procfs$namespace(0x0, &(0x7f0000000080)='ns/mnt\x00')
newfstatat(0xffffffffffffff9c, 0x0, &(0x7f0000000080)={0x0, 0x0, 0x0, 0x0, <r1=>0x0}, 0x1000)
setresuid(0x0, r1, 0x0)
open_by_handle_at(r0, &(0x7f0000000240)=ANY=[@ANYBLOB="1c000000f100000001"], 0x0)