tree 106731a72f6505e8f9a21ca9059022a59e791df0
parent e4770de3ae41816338bd791da09cd8fc01b7e49a
author Larry Finger <Larry.Finger@lwfinger.net> 1581357753 -0600
committer Greg Kroah-Hartman <gregkh@linuxfoundation.org> 1582904328 +0100

staging: rtl8723bs: Fix potential overuse of kernel memory

commit 23954cb078febfc63a755301fe77e06bccdb4d2a 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 554c0a3abf216 ("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: 554c0a3abf216 ("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>