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| author | Oliver Neukum <oneukum@suse.com> | 2022-02-17 14:10:44 +0100 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2022-03-02 11:38:10 +0100 |
| commit | dde5ddf02a47487dd6efcc7077307f1d4e1ba337 (patch) | |
| tree | b3cb3d6c9e61fb5d3b906b597b92956de59b9d1e /drivers/net | |
| parent | 13584c63745b6a7f7fc151c2c675bd1297b9e2be (diff) | |
| download | linux-stable-dde5ddf02a47487dd6efcc7077307f1d4e1ba337.tar.gz linux-stable-dde5ddf02a47487dd6efcc7077307f1d4e1ba337.tar.bz2 linux-stable-dde5ddf02a47487dd6efcc7077307f1d4e1ba337.zip | |
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>
Diffstat (limited to 'drivers/net')
| -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 6ac232e52bf7..83640628c47d 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 */ |