[PATCH][next] ath10k: fix out of bound read on array ath10k_rates

[PATCH][next] ath10k: fix out of bound read on array ath10k_rates

[Colin King]

From: Colin Ian King <colin.king@canonical.com>

An out-of-bounds read on array ath10k_rates is occurring because
the maximum number of elements is currently based on the size of
the array and not the number of elements in the array. Fix this
by using ARRAY_SIZE instead of sizeof.

Detected by CoverityScan, CID#1473918 ("Out-of-bounds read")

Fixes: f279294e9ee2 ("ath10k: add support for configuring management packet rate")
Signed-off-by: Colin Ian King <colin.king@canonical.com>
---
 drivers/net/wireless/ath/ath10k/mac.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/net/wireless/ath/ath10k/mac.c b/drivers/net/wireless/ath/ath10k/mac.c
index 3933dd96da55..3564676e74e3 100644
--- a/drivers/net/wireless/ath/ath10k/mac.c
+++ b/drivers/net/wireless/ath/ath10k/mac.c
@@ -164,7 +164,7 @@ static int ath10k_mac_get_rate_hw_value(int bitrate)
 	if (ath10k_mac_bitrate_is_cck(bitrate))
 		hw_value_prefix = WMI_RATE_PREAMBLE_CCK << 6;
 
-	for (i = 0; i < sizeof(ath10k_rates); i++) {
+	for (i = 0; i < ARRAY_SIZE(ath10k_rates); i++) {
 		if (ath10k_rates[i].bitrate == bitrate)
 			return hw_value_prefix | ath10k_rates[i].hw_value;
 	}
-- 
2.17.1

Re: [PATCH][next] ath10k: fix out of bound read on array ath10k_rates

[Kalle Valo]

Colin King <colin.king@canonical.com> wrote:

> From: Colin Ian King <colin.king@canonical.com>
> 
> An out-of-bounds read on array ath10k_rates is occurring because
> the maximum number of elements is currently based on the size of
> the array and not the number of elements in the array. Fix this
> by using ARRAY_SIZE instead of sizeof.
> 
> Detected by CoverityScan, CID#1473918 ("Out-of-bounds read")
> 
> Fixes: f279294e9ee2 ("ath10k: add support for configuring management packet rate")
> Signed-off-by: Colin Ian King <colin.king@canonical.com>

This is already fixed in ath-next.

error: patch failed: drivers/net/wireless/ath/ath10k/mac.c:164
error: drivers/net/wireless/ath/ath10k/mac.c: patch does not apply
stg import: Diff does not apply cleanly

Patch set to Rejected.

-- 
https://patchwork.kernel.org/patch/10628815/

https://wireless.wiki.kernel.org/en/developers/documentation/submittingpatches