Re: [PATCH net] bpf: don't indicate success when copy_from_user fails
From: David Miller <davem@davemloft.net>
Date: 2017-07-29 21:29:29
From: Daniel Borkmann <daniel@iogearbox.net> Date: Thu, 27 Jul 2017 21:02:46 +0200
err in bpf_prog_get_info_by_fd() still holds 0 at that time from prior
check_uarg_tail_zero() check. Explicitly return -EFAULT instead, so
user space can be notified of buggy behavior.
Fixes: 1e2709769086 ("bpf: Add BPF_OBJ_GET_INFO_BY_FD")
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>Applied, thanks.