From: Jakub Kicinski <kuba@kernel.org>
To: Johannes Krude <johannes@krude.de>
Cc: bpf@vger.kernel.org, netdev@vger.kernel.org,
linux-kernel@vger.kernel.org,
"David S. Miller" <davem@davemloft.net>,
trivial@kernel.org
Subject: Re: [PATCH] bpf_prog_offload_info_fill: replace bitwise AND by logical AND
Date: Wed, 12 Feb 2020 19:38:29 -0800 [thread overview]
Message-ID: <20200212193829.00ddefc0@cakuba.hsd1.ca.comcast.net> (raw)
In-Reply-To: <20200212193227.GA3769@phlox.h.transitiv.net>
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 <johannes@krude.de>
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>
next prev parent reply other threads:[~2020-02-13 3:38 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-02-12 19:32 [PATCH] bpf_prog_offload_info_fill: replace bitwise AND by logical AND Johannes Krude
2020-02-13 3:38 ` Jakub Kicinski [this message]
2020-02-17 15:56 ` Daniel Borkmann
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