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authorLarry Finger <Larry.Finger@lwfinger.net>2020-02-10 12:02:32 -0600
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2020-02-10 10:32:38 -0800
commit4ddf8ab8d15ddbc52eefb44eb64e38466ce1f70f (patch)
tree9180a3cb6b64e8538e5c5dbbdd533b4219f17ab4 /drivers/staging/rtl8188eu
parentac33597c0c0d1d819dccfe001bcd0acef7107e7c (diff)
staging: rtl8188eu: Fix potential overuse of kernel memory
In routine wpa_supplicant_ioctl(), the user-controlled p->length is checked to be at least the size of struct ieee_param size, but the code does not detect the case where p->length is greater than the size of the struct, thus a malicious user could be wasting kernel memory. Fixes commit a2c60d42d97c ("Add files for new driver - part 16"). Reported by: Pietro Oliva <pietroliva@gmail.com> Cc: Pietro Oliva <pietroliva@gmail.com> Cc: Stable <stable@vger.kernel.org> Fixes commit a2c60d42d97c ("Add files for new driver - part 16"). Signed-off-by: Larry Finger <Larry.Finger@lwfinger.net> Link: https://lore.kernel.org/r/20200210180235.21691-4-Larry.Finger@lwfinger.net Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/staging/rtl8188eu')
-rw-r--r--drivers/staging/rtl8188eu/os_dep/ioctl_linux.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/staging/rtl8188eu/os_dep/ioctl_linux.c b/drivers/staging/rtl8188eu/os_dep/ioctl_linux.c
index 7d21f5799640..acca3ae8b254 100644
--- a/drivers/staging/rtl8188eu/os_dep/ioctl_linux.c
+++ b/drivers/staging/rtl8188eu/os_dep/ioctl_linux.c
@@ -2009,7 +2009,7 @@ static int wpa_supplicant_ioctl(struct net_device *dev, struct iw_point *p)
struct ieee_param *param;
uint ret = 0;
- if (p->length < sizeof(struct ieee_param) || !p->pointer) {
+ if (!p->pointer || p->length != sizeof(struct ieee_param)) {
ret = -EINVAL;
goto out;
}