6.6-stable review patch. If anyone has any objections, please let me know.
------------------
From: Jozef Hopko <jozef.hopko@xxxxxxxxxx>
[ Upstream commit 39ab8fff623053a50951b659e5f6b72343d7d78c ]
Commit 205c50306acf ("wifi: wilc1000: fix RCU usage in connect path")
made sure that the IEs data was manipulated under the relevant RCU section.
Unfortunately, while doing so, the commit brought a faulty implicit cast
from int to u8 on the ies_len variable, making the parsing fail to be
performed correctly if the IEs block is larger than 255 bytes. This failure
can be observed with Access Points appending a lot of IEs TLVs in their
beacon frames (reproduced with a Pixel phone acting as an Access Point,
which brough 273 bytes of IE data in my testing environment).
Fix IEs parsing by removing this undesired implicit cast.
Fixes: 205c50306acf ("wifi: wilc1000: fix RCU usage in connect path")
Signed-off-by: Jozef Hopko <jozef.hopko@xxxxxxxxxx>
Signed-off-by: Alexis Lothoré <alexis.lothore@xxxxxxxxxxx>
Acked-by: Ajay Singh <ajay.kathat@xxxxxxxxxxxxx>
Signed-off-by: Kalle Valo <kvalo@xxxxxxxxxx>
Link: https://patch.msgid.link/20240701-wilc_fix_ies_data-v1-1-7486cbacf98a@xxxxxxxxxxx
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
---
drivers/net/wireless/microchip/wilc1000/hif.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/drivers/net/wireless/microchip/wilc1000/hif.c b/drivers/net/wireless/microchip/wilc1000/hif.c
index e202013e6f2fe..e4bb3ea6e2267 100644
--- a/drivers/net/wireless/microchip/wilc1000/hif.c
+++ b/drivers/net/wireless/microchip/wilc1000/hif.c
@@ -379,7 +379,8 @@ void *wilc_parse_join_bss_param(struct cfg80211_bss *bss,
struct ieee80211_p2p_noa_attr noa_attr;
const struct cfg80211_bss_ies *ies;
struct wilc_join_bss_param *param;
- u8 rates_len = 0, ies_len;
+ u8 rates_len = 0;
+ int ies_len;
int ret;
param = kzalloc(sizeof(*param), GFP_KERNEL);
--
2.43.0
