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| author | Larry Finger <Larry.Finger@lwfinger.net> | 2020-02-10 21:02:32 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2020-02-10 21:32:38 +0300 |
| commit | 4ddf8ab8d15ddbc52eefb44eb64e38466ce1f70f (patch) | |
| tree | 9180a3cb6b64e8538e5c5dbbdd533b4219f17ab4 /drivers/staging | |
| parent | ac33597c0c0d1d819dccfe001bcd0acef7107e7c (diff) | |
| download | linux-4ddf8ab8d15ddbc52eefb44eb64e38466ce1f70f.tar.xz | |
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')
| -rw-r--r-- | drivers/staging/rtl8188eu/os_dep/ioctl_linux.c | 2 |
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; } |