This is a note to let you know that I've just added the patch titled
wifi: mwifiex: Fix the size of a memory allocation in mwifiex_ret_802_11_scan()
to the 4.19-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
wifi-mwifiex-fix-the-size-of-a-memory-allocation-in-.patch
and it can be found in the queue-4.19 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit d6fb7a006f008102f2c65907ae4ba8fed02b5d0b
Author: Christophe JAILLET <christophe.jaillet@xxxxxxxxxx>
Date: Sat May 6 15:53:15 2023 +0200
wifi: mwifiex: Fix the size of a memory allocation in mwifiex_ret_802_11_scan()
[ Upstream commit d9aef04fcfa81ee4fb2804a21a3712b7bbd936af ]
The type of "mwifiex_adapter->nd_info" is "struct cfg80211_wowlan_nd_info",
not "struct cfg80211_wowlan_nd_match".
Use struct_size() to ease the computation of the needed size.
The current code over-allocates some memory, so is safe.
But it wastes 32 bytes.
Fixes: 7d7f07d8c5d3 ("mwifiex: add wowlan net-detect support")
Signed-off-by: Christophe JAILLET <christophe.jaillet@xxxxxxxxxx>
Reviewed-by: Simon Horman <simon.horman@xxxxxxxxxxxx>
Signed-off-by: Kalle Valo <kvalo@xxxxxxxxxx>
Link: https://lore.kernel.org/r/7a6074fb056d2181e058a3cc6048d8155c20aec7.1683371982.git.christophe.jaillet@xxxxxxxxxx
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
diff --git a/drivers/net/wireless/marvell/mwifiex/scan.c b/drivers/net/wireless/marvell/mwifiex/scan.c
index c9f6cd2919699..4f0e78ae3dbd0 100644
--- a/drivers/net/wireless/marvell/mwifiex/scan.c
+++ b/drivers/net/wireless/marvell/mwifiex/scan.c
@@ -2208,9 +2208,9 @@ int mwifiex_ret_802_11_scan(struct mwifiex_private *priv,
if (nd_config) {
adapter->nd_info =
- kzalloc(sizeof(struct cfg80211_wowlan_nd_match) +
- sizeof(struct cfg80211_wowlan_nd_match *) *
- scan_rsp->number_of_sets, GFP_ATOMIC);
+ kzalloc(struct_size(adapter->nd_info, matches,
+ scan_rsp->number_of_sets),
+ GFP_ATOMIC);
if (adapter->nd_info)
adapter->nd_info->n_matches = scan_rsp->number_of_sets;
