diff options
| author | Larry Finger <Larry.Finger@lwfinger.net> | 2020-02-10 12:02:33 -0600 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2020-02-28 17:22:17 +0100 |
| commit | 3b8edaada13e08493161fa6e871a31152b5efb2b (patch) | |
| tree | 4b70bed21e126859710b564f589863a3bf9cac7e /drivers | |
| parent | 4113e08e75d3d3c6e326ab799d116f95e3685bb7 (diff) | |
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>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/staging/rtl8723bs/os_dep/ioctl_linux.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/staging/rtl8723bs/os_dep/ioctl_linux.c b/drivers/staging/rtl8723bs/os_dep/ioctl_linux.c index 82cc385358b41..d8d44fd9a92f4 100644 --- a/drivers/staging/rtl8723bs/os_dep/ioctl_linux.c +++ b/drivers/staging/rtl8723bs/os_dep/ioctl_linux.c @@ -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; } |