Re: [PATCH] bpf_prog_offload_info_fill: replace bitwise AND by logical AND

On Wed, 12 Feb 2020 20:32:27 +0100, Johannes Krude wrote:

This if guards whether user-space wants a copy of the offload-jited
bytecode and whether this bytecode exists. By erroneously doing a bitwise
AND instead of a logical AND on user- and kernel-space buffer-size can lead
to no data being copied to user-space especially when user-space size is a
power of two and bigger then the kernel-space buffer.

Signed-off-by: Johannes Krude <redacted>

Thank you for the fix, in the future please provide a Fixes tag and
include the tree name in the PATCH tag, e.g. [PATCH bpf], or [PATCH net]
etc.

Fixes: fcfb126defda ("bpf: add new jited info fields in bpf_dev_offload and bpf_prog_info")

Acked-by: Jakub Kicinski <kuba@kernel.org>