diff options
| author | Ali Tariq <alitariq45892@gmail.com> | 2025-12-25 11:54:29 +0000 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2026-02-16 10:13:34 +0100 |
| commit | 9a0f3fa6ecd0c9c32dbc367a57482bbf7c7d25bf (patch) | |
| tree | 43d5b6be0a636bdc34403c73aad2c230053550f7 | |
| parent | 73cee890adafa2c219bb865356e08e7f82423fe5 (diff) | |
wifi: rtl8xxxu: fix slab-out-of-bounds in rtl8xxxu_sta_add
commit 86c946bcc00f6390ef65e9614ae60a9377e454f8 upstream.
The driver does not set hw->sta_data_size, which causes mac80211 to
allocate insufficient space for driver private station data in
__sta_info_alloc(). When rtl8xxxu_sta_add() accesses members of
struct rtl8xxxu_sta_info through sta->drv_priv, this results in a
slab-out-of-bounds write.
KASAN report on RISC-V (VisionFive 2) with RTL8192EU adapter:
BUG: KASAN: slab-out-of-bounds in rtl8xxxu_sta_add+0x31c/0x346
Write of size 8 at addr ffffffd6d3e9ae88 by task kworker/u16:0/12
Set hw->sta_data_size to sizeof(struct rtl8xxxu_sta_info) during
probe, similar to how hw->vif_data_size is configured. This ensures
mac80211 allocates sufficient space for the driver's per-station
private data.
Tested on StarFive VisionFive 2 v1.2A board.
Fixes: eef55f1545c9 ("wifi: rtl8xxxu: support multiple interfaces in {add,remove}_interface()")
Cc: stable@vger.kernel.org
Signed-off-by: Ali Tariq <alitariq45892@gmail.com>
Reviewed-by: Ping-Ke Shih <pkshih@realtek.com>
Signed-off-by: Ping-Ke Shih <pkshih@realtek.com>
Link: https://patch.msgid.link/20251225115430.13011-1-alitariq45892@gmail.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -rw-r--r-- | drivers/net/wireless/realtek/rtl8xxxu/core.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/drivers/net/wireless/realtek/rtl8xxxu/core.c b/drivers/net/wireless/realtek/rtl8xxxu/core.c index c06ad064f37c..f9a527f6a175 100644 --- a/drivers/net/wireless/realtek/rtl8xxxu/core.c +++ b/drivers/net/wireless/realtek/rtl8xxxu/core.c @@ -7826,6 +7826,7 @@ static int rtl8xxxu_probe(struct usb_interface *interface, goto err_set_intfdata; hw->vif_data_size = sizeof(struct rtl8xxxu_vif); + hw->sta_data_size = sizeof(struct rtl8xxxu_sta_info); hw->wiphy->max_scan_ssids = 1; hw->wiphy->max_scan_ie_len = IEEE80211_MAX_DATA_LEN; |