diff options
| author | Dan Carpenter <dan.carpenter@oracle.com> | 2021-09-30 15:26:04 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2021-10-05 12:35:30 +0200 |
| commit | 37f12202c5d28291ba5f83ce229771447ce9148f (patch) | |
| tree | 8886efd5ad1616b153c11f9f2a240aed9dabc57d /drivers | |
| parent | 7ff4034e910fe00a90d985f0d05bacf60c162f02 (diff) | |
| download | linux-stable-37f12202c5d28291ba5f83ce229771447ce9148f.tar.gz linux-stable-37f12202c5d28291ba5f83ce229771447ce9148f.tar.bz2 linux-stable-37f12202c5d28291ba5f83ce229771447ce9148f.zip | |
staging: r8188eu: prevent array underflow in rtw_hal_update_ra_mask()
The problem is that "mac_id" is a u32 so this check for underflow does
not work when "mac_id" is zero. In that situation, "mac_id - 1" is
UINT_MAX instead of -1 so the condition is true. It leads to an
array underflow on the next line.
Fixes: 8cd574e6af54 ("staging: r8188eu: introduce new hal dir for RTL8188eu driver")
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Link: https://lore.kernel.org/r/20210930122604.GB10068@kili
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/staging/r8188eu/hal/hal_intf.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/staging/r8188eu/hal/hal_intf.c b/drivers/staging/r8188eu/hal/hal_intf.c index a6d589e89aeb..f27eba72d646 100644 --- a/drivers/staging/r8188eu/hal/hal_intf.c +++ b/drivers/staging/r8188eu/hal/hal_intf.c @@ -248,7 +248,7 @@ void rtw_hal_update_ra_mask(struct adapter *adapt, u32 mac_id, u8 rssi_level) #ifdef CONFIG_88EU_AP_MODE struct sta_info *psta = NULL; struct sta_priv *pstapriv = &adapt->stapriv; - if ((mac_id - 1) > 0) + if (mac_id >= 2) psta = pstapriv->sta_aid[(mac_id - 1) - 1]; if (psta) add_RATid(adapt, psta, 0);/* todo: based on rssi_level*/ |