redonkable
/
alistair23-linux
1
0
Fork 0
Code Releases Activity

staging: rtl8723bs: Fix potential overuse of kernel memory 

commit 23954cb078 upstream.

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 554c0a3abf ("staging: Add rtl8723bs sdio wifi driver").

Reported by: Pietro Oliva <pietroliva@gmail.com>
Cc: Pietro Oliva <pietroliva@gmail.com>
Cc: Stable <stable@vger.kernel.org>
Fixes: 554c0a3abf ("staging: Add rtl8723bs sdio wifi driver").
Signed-off-by: Larry Finger <Larry.Finger@lwfinger.net>
Link: https://lore.kernel.org/r/20200210180235.21691-5-Larry.Finger@lwfinger.net
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
5.4-rM2-2.2.x-imx-squashed
Larry Finger 2020-02-10 12:02:33 -06:00 committed by Greg Kroah-Hartman
parent 4113e08e75
commit 3b8edaada1
1 changed files with 1 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
drivers/staging/rtl8723bs/os_dep/ioctl_linux.c
View File

@ -3379,7 +3379,7 @@ static int wpa_supplicant_ioctl(struct net_device *dev, struct iw_point *p)
/* down(&ieee->wx_sem); */
if (p->length < sizeof(struct ieee_param) || !p->pointer) {
if (!p->pointer || p->length != sizeof(struct ieee_param)) {
ret = -EINVAL;
goto out;
}