From: Leon Romanovsky <leon@kernel•org>
To: Jakob Koschel <jkl820.git@gmail•com>
Cc: Boris Pismenny <borisp@nvidia•com>,
Saeed Mahameed <saeedm@nvidia•com>,
"David S. Miller" <davem@davemloft•net>,
Eric Dumazet <edumazet@google•com>,
Jakub Kicinski <kuba@kernel•org>, Paolo Abeni <pabeni@redhat•com>,
netdev@vger•kernel.org, linux-rdma@vger•kernel.org,
linux-kernel@vger•kernel.org,
Pietro Borrello <borrello@diag•uniroma1.it>,
Cristiano Giuffrida <c.giuffrida@vu•nl>,
"Bos, H.J." <h.j.bos@vu•nl>
Subject: Re: [PATCH net-next] net/mlx5e: avoid usage of list iterator after loop
Date: Tue, 14 Mar 2023 15:27:05 +0200 [thread overview]
Message-ID: <20230314132705.GE36557@unreal> (raw)
In-Reply-To: <20230301-net-mlx5e-avoid-iter-after-loop-v1-1-064c0e9b1505@gmail.com>
On Mon, Mar 13, 2023 at 04:26:02PM +0100, Jakob Koschel wrote:
> If potentially no valid element is found, 'priv_rx' would contain an
> invalid pointer past the iterator loop. To ensure 'priv_rx' is always
> valid, we only set it if the correct element was found. That allows
> adding a WARN_ON() in case the code works incorrectly, exposing
> currently undetectable potential bugs.
>
> Additionally, Linus proposed to avoid any use of the list iterator
> variable after the loop, in the attempt to move the list iterator
> variable declaration into the macro to avoid any potential misuse after
> the loop [1].
>
> Link: https://lore.kernel.org/all/CAHk-=wgRr_D8CB-D9Kg-c=EHreAsk5SqXPwr9Y7k9sA6cWXJ6w@mail.gmail.com/ [1]
> Signed-off-by: Jakob Koschel <jkl820.git@gmail•com>
> ---
> drivers/net/ethernet/mellanox/mlx5/core/en_accel/ktls_rx.c | 11 +++++++----
> 1 file changed, 7 insertions(+), 4 deletions(-)
>
Thanks,
Reviewed-by: Leon Romanovsky <leonro@nvidia•com>
next prev parent reply other threads:[~2023-03-14 13:30 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-03-13 15:26 [PATCH net-next] net/mlx5e: avoid usage of list iterator after loop Jakob Koschel
2023-03-14 13:27 ` Leon Romanovsky [this message]
2023-03-21 20:49 ` Saeed Mahameed
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