tkill(0x0, 0x0)
ptrace(0xffffffffffffffff, 0x0)
wait4(0x0, 0x0, 0x0, 0x0)
r0 = add_key$keyring(&(0x7f0000000500), &(0x7f0000000540)={'syz', 0x1}, 0x0, 0x0, 0xffffffffffffffff)
keyctl$restrict_keyring(0xa, r0, &(0x7f0000000040)='dns_resolver\x00', &(0x7f0000000800)='\x00')