diff options
| author | Oliver Neukum <oneukum@suse.com> | 2022-02-17 16:10:44 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2022-03-02 13:47:50 +0300 |
| commit | 9f2d614779906f3d8ad4fb882c5b3e5ad6150bbe (patch) | |
| tree | f6592d04c262504fa18700b6c14b7a31ad58d660 | |
| parent | 0726fca0b6cc26a9ee6b0a0ac8984b8be0c62fb8 (diff) | |
| download | linux-9f2d614779906f3d8ad4fb882c5b3e5ad6150bbe.tar.xz | |
sr9700: sanity check for packet length
commit e9da0b56fe27206b49f39805f7dcda8a89379062 upstream.
A malicious device can leak heap data to user space
providing bogus frame lengths. Introduce a sanity check.
Signed-off-by: Oliver Neukum <oneukum@suse.com>
Reviewed-by: Grant Grundler <grundler@chromium.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -rw-r--r-- | drivers/net/usb/sr9700.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/net/usb/sr9700.c b/drivers/net/usb/sr9700.c index 6516a37893e2..0c50f24671da 100644 --- a/drivers/net/usb/sr9700.c +++ b/drivers/net/usb/sr9700.c @@ -410,7 +410,7 @@ static int sr9700_rx_fixup(struct usbnet *dev, struct sk_buff *skb) /* ignore the CRC length */ len = (skb->data[1] | (skb->data[2] << 8)) - 4; - if (len > ETH_FRAME_LEN) + if (len > ETH_FRAME_LEN || len > skb->len) return 0; /* the last packet of current skb */ |