tree 49c0a9a8eaf6ec2c1dc548f0e68fcc2c2f8ed91b
parent b2a20fd0725e8b259c528820033e29fdb3724549
author Jakub Kicinski <jakub.kicinski@netronome.com> 1556238909 -0700
committer David S. Miller <davem@davemloft.net> 1556410639 -0400

net/tls: don't copy negative amounts of data in reencrypt

There is no guarantee the record starts before the skb frags.
If we don't check for this condition copy amount will get
negative, leading to reads and writes to random memory locations.
Familiar hilarity ensues.

Fixes: 4799ac81e52a ("tls: Add rx inline crypto offload")
Signed-off-by: Jakub Kicinski <jakub.kicinski@netronome.com>
Reviewed-by: John Hurley <john.hurley@netronome.com>
Signed-off-by: David S. Miller <davem@davemloft.net>