From: Ben Greear <greearb@candelatech.com>
To: "Gustavo A. R. Silva" <gustavo@embeddedor.com>,
Kalle Valo <kvalo@codeaurora.org>,
"David S. Miller" <davem@davemloft.net>
Cc: ath10k@lists.infradead.org, linux-wireless@vger.kernel.org,
netdev@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: Re: [PATCH] ath10k: htt_rx: Fix signedness bug in ath10k_update_per_peer_tx_stats
Date: Fri, 5 Oct 2018 12:09:50 -0700 [thread overview]
Message-ID: <3a55bec6-d20d-f500-e741-b228a86b7117@candelatech.com> (raw)
In-Reply-To: <20181005184245.GA11700@embeddedor.com>
On 10/05/2018 11:42 AM, Gustavo A. R. Silva wrote:
> Currently, the error handling for the call to function
> ath10k_get_legacy_rate_idx() doesn't work because
> *rate_idx* is of type u8 (8 bits, unsigned), which
> makes it impossible for it to hold a value less
> than 0.
>
> Fix this by changing the type of variable *rate_idx*
> to s8 (8 bits, signed).
There are more than 127 rates, are you sure this is doing
what you want?
Thanks,
Ben
>
> Addresses-Coverity-ID: 1473914 ("Unsigned compared against 0")
> Fixes: 0189dbd71cbd ("ath10k: get the legacy rate index to update the txrate table")
> Signed-off-by: Gustavo A. R. Silva <gustavo@embeddedor.com>
> ---
> drivers/net/wireless/ath/ath10k/htt_rx.c | 3 ++-
> 1 file changed, 2 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/net/wireless/ath/ath10k/htt_rx.c b/drivers/net/wireless/ath/ath10k/htt_rx.c
> index f240525..edd0e74 100644
> --- a/drivers/net/wireless/ath/ath10k/htt_rx.c
> +++ b/drivers/net/wireless/ath/ath10k/htt_rx.c
> @@ -2753,7 +2753,8 @@ ath10k_update_per_peer_tx_stats(struct ath10k *ar,
> struct ath10k_per_peer_tx_stats *peer_stats)
> {
> struct ath10k_sta *arsta = (struct ath10k_sta *)sta->drv_priv;
> - u8 rate = 0, rate_idx = 0, sgi;
> + u8 rate = 0, sgi;
> + s8 rate_idx = 0;
> struct rate_info txrate;
>
> lockdep_assert_held(&ar->data_lock);
>
--
Ben Greear <greearb@candelatech.com>
Candela Technologies Inc http://www.candelatech.com
next prev parent reply other threads:[~2018-10-05 19:09 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-10-05 18:42 [PATCH] ath10k: htt_rx: Fix signedness bug in ath10k_update_per_peer_tx_stats Gustavo A. R. Silva
2018-10-05 19:09 ` Ben Greear [this message]
2018-10-05 19:14 ` Gustavo A. R. Silva
2018-10-05 19:15 ` Gustavo A. R. Silva
2018-10-08 6:38 ` Anilkumar Kolli
2018-10-09 19:19 ` Gustavo A. R. Silva
2018-10-13 17:23 ` Kalle Valo
[not found] ` <20181013172330.1CC8E60BFE@smtp.codeaurora.org>
2018-10-13 18:26 ` Gustavo A. R. Silva
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