4.19-stable review patch. If anyone has any objections, please let me know.
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From: Dan Carpenter dan.carpenter@oracle.com
[ Upstream commit 3348ef6a6a126706d6a73ed40c18d8033df72783 ]
If recvlength is less than MESSAGE_HEADER_LEN (4) we would end up corrupting memory.
Fixes: c305a19a0d0a ("libertas_tf: usb specific functions") Signed-off-by: Dan Carpenter dan.carpenter@oracle.com Signed-off-by: Kalle Valo kvalo@codeaurora.org Signed-off-by: Sasha Levin sashal@kernel.org Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- drivers/net/wireless/marvell/libertas_tf/if_usb.c | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-)
--- a/drivers/net/wireless/marvell/libertas_tf/if_usb.c +++ b/drivers/net/wireless/marvell/libertas_tf/if_usb.c @@ -605,9 +605,10 @@ static inline void process_cmdrequest(in { unsigned long flags;
- if (recvlength > LBS_CMD_BUFFER_SIZE) { + if (recvlength < MESSAGE_HEADER_LEN || + recvlength > LBS_CMD_BUFFER_SIZE) { lbtf_deb_usbd(&cardp->udev->dev, - "The receive buffer is too large\n"); + "The receive buffer is invalid: %d\n", recvlength); kfree_skb(skb); return; }