nvme-tcp: fix potential memory corruption in nvme_tcp_recv_pdu()

Vulnerability Description

In the Linux kernel, the following vulnerability has been resolved: nvme-tcp: fix potential memory corruption in nvme_tcp_recv_pdu() nvme_tcp_recv_pdu() doesn't check the validity of the header length. When header digests are enabled, a target might send a packet with an invalid header length (e.g. 255), causing nvme_tcp_verify_hdgst() to access memory outside the allocated area and cause memory corruptions by overwriting it with the calculated digest. Fix this by rejecting packets with an unexpected header length.

References

• https://git.kernel.org/stable/c/9fbc953d6b38bc824392e01850f0aeee3b348722
• https://git.kernel.org/stable/c/22b06c89aa6b2d1ecb8aea72edfb9d53af8d5126
• https://git.kernel.org/stable/c/ad95bab0cd28ed77c2c0d0b6e76e03e031391064