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mwifiex: correct histogram data with appropriate index

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[ Upstream commit 30bfce0b63 ]

Correct snr/nr/rssi data index to avoid possible buffer underflow.

Signed-off-by: Xinming Hu <huxm@marvell.com>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
Signed-off-by: Sasha Levin <alexander.levin@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Xinming Hu
2018-05-18 15:38:54 +08:00
committed by Greg Kroah-Hartman
parent f14629f347
commit db6872750d
1 changed files with 5 additions and 3 deletions
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8
drivers/net/wireless/marvell/mwifiex/util.c
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@@ -723,12 +723,14 @@ void mwifiex_hist_data_set(struct mwifiex_private *priv, u8 rx_rate, s8 snr,
s8 nflr)
{
struct mwifiex_histogram_data *phist_data = priv->hist_data;
s8 nf = -nflr;
s8 rssi = snr - nflr;
atomic_inc(&phist_data->num_samples);
atomic_inc(&phist_data->rx_rate[rx_rate]);
atomic_inc(&phist_data->snr[snr]);
atomic_inc(&phist_data->noise_flr[128 + nflr]);
atomic_inc(&phist_data->sig_str[nflr - snr]);
atomic_inc(&phist_data->snr[snr + 128]);
atomic_inc(&phist_data->noise_flr[nf + 128]);
atomic_inc(&phist_data->sig_str[rssi + 128]);
}
/* function to reset histogram data during init/reset */