net: usb: smsc75xx: Limit packet length to skb->len

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[ Upstream commit d8b2283189 ]

Packet length retrieved from skb data may be larger than
the actual socket buffer length (up to 9026 bytes). In such
case the cloned skb passed up the network stack will leak
kernel memory contents.

Fixes: d0cad87170 ("smsc75xx: SMSC LAN75xx USB gigabit ethernet adapter driver")
Signed-off-by: Szymon Heidrich <szymon.heidrich@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Sasha Levin <sashal@kernel.org>

...

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Szymon Heidrich 2023-03-13 23:00:45 +01:00 • committed by Greg Kroah-Hartman

parent c9ca225715

commit 8ee5df9c03

1 changed files with 2 additions and 1 deletions

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drivers/net/usb/smsc75xx.c

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