tree 5d11e5ff1d358db10e02ffaa583dc462ad0835a2
parent e25d5dbcffae62c9a7fa03517dfa4b8e67670e3d
author Dan Carpenter <dan.carpenter@oracle.com> 1583331871 +0300
committer David S. Miller <davem@davemloft.net> 1583472762 -0800

net: nfc: fix bounds checking bugs on "pipe"

This is similar to commit 674d9de02aa7 ("NFC: Fix possible memory
corruption when handling SHDLC I-Frame commands") and commit d7ee81ad09f0
("NFC: nci: Add some bounds checking in nci_hci_cmd_received()") which
added range checks on "pipe".

The "pipe" variable comes skb->data[0] in nfc_hci_msg_rx_work().
It's in the 0-255 range.  We're using it as the array index into the
hdev->pipes[] array which has NFC_HCI_MAX_PIPES (128) members.

Fixes: 118278f20aa8 ("NFC: hci: Add pipes table to reference them with a tuple {gate, host}")
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: David S. Miller <davem@davemloft.net>