tree bf400027c33a83030519e00b0c391e61e29a5566
parent 435c556cde6096c2035207a5dceef1d99da51d01
author Eric Dumazet <edumazet@google.com> 1467046313 +0200
committer David S. Miller <davem@davemloft.net> 1467360175 -0400

tcp: md5: use kmalloc() backed scratch areas

Some arches have virtually mapped kernel stacks, or will soon have.

tcp_md5_hash_header() uses an automatic variable to copy tcp header
before mangling th->check and calling crypto function, which might
be problematic on such arches.

David says that using percpu storage is also problematic on non SMP
builds.

Just use kmalloc() to allocate scratch areas.

Signed-off-by: Eric Dumazet <edumazet@google.com>
Reported-by: Andy Lutomirski <luto@amacapital.net>
Signed-off-by: David S. Miller <davem@davemloft.net>