lisa/android_kernel_xiaomi_sm8350
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

UPSTREAM: sr9700: sanity check for packet length

Browse Source 
[ Upstream commit e9da0b56fe27206b49f39805f7dcda8a89379062 ]

A malicious device can leak heap data to user space
providing bogus frame lengths. Introduce a sanity check.

Bug: 225469258
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: Lee Jones <lee.jones@linaro.org>
Change-Id: I2f17bd57b5c4228d0420f716527316a878a34efd
(cherry picked from commit e7f39d0aa294f998ddd55c5becb5e9601912da0d)
This commit is contained in:
Oliver Neukum 2022-02-17 14:10:44 +01:00 committed by Lee Jones
parent ea62106bb8
commit 55f3c6361f
1 changed files with 1 additions and 1 deletions

2
drivers/net/usb/sr9700.c
View File

@ -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 */