diff options
| author | Dan Carpenter <dan.carpenter@oracle.com> | 2019-04-04 11:44:23 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2019-05-31 06:47:22 -0700 |
| commit | 0e4c9c7561ecfcb3b40f9eca63831ed2471ece8c (patch) | |
| tree | b03cd0a4efdd2fc6888c7d466e6cca2833c92675 /drivers/net/wireless/marvell | |
| parent | 0d7325abe29ba50dc9822b1bc6bc9e47586504d6 (diff) | |
mwifiex: prevent an array overflow
[ Upstream commit b4c35c17227fe437ded17ce683a6927845f8c4a4 ]
The "rate_index" is only used as an index into the phist_data->rx_rate[]
array in the mwifiex_hist_data_set() function. That array has
MWIFIEX_MAX_AC_RX_RATES (74) elements and it's used to generate some
debugfs information. The "rate_index" variable comes from the network
skb->data[] and it is a u8 so it's in the 0-255 range. We need to cap
it to prevent an array overflow.
Fixes: cbf6e05527a7 ("mwifiex: add rx histogram statistics support")
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Diffstat (limited to 'drivers/net/wireless/marvell')
| -rw-r--r-- | drivers/net/wireless/marvell/mwifiex/cfp.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/drivers/net/wireless/marvell/mwifiex/cfp.c b/drivers/net/wireless/marvell/mwifiex/cfp.c index bfe84e55df77..f1522fb1c1e8 100644 --- a/drivers/net/wireless/marvell/mwifiex/cfp.c +++ b/drivers/net/wireless/marvell/mwifiex/cfp.c @@ -531,5 +531,8 @@ u8 mwifiex_adjust_data_rate(struct mwifiex_private *priv, rate_index = (rx_rate > MWIFIEX_RATE_INDEX_OFDM0) ? rx_rate - 1 : rx_rate; + if (rate_index >= MWIFIEX_MAX_AC_RX_RATES) + rate_index = MWIFIEX_MAX_AC_RX_RATES - 1; + return rate_index; } |