tree 5b7f7db5bad034ee1d5e4dd98a39c7e4d7a62267
parent f19ded524fd8de25d068ec6bdb4a90a52c77e294
author Martijn Coenen <maco@android.com> 1562670563 +0200
committer Todd Kjos <tkjos@google.com> 1572895945 -0800

BACKPORT: binder: Set end of SG buffer area properly.

In case the target node requests a security context, the
extra_buffers_size is increased with the size of the security context.
But, that size is not available for use by regular scatter-gather
buffers; make sure the ending of that buffer is marked correctly.

Bug: 136210786
Acked-by: Todd Kjos <tkjos@google.com>
Fixes: ec74136ded79 ("binder: create node flag to request sender's security context")
Signed-off-by: Martijn Coenen <maco@android.com>
Cc: stable@vger.kernel.org # 5.1+
Link: https://lore.kernel.org/r/20190709110923.220736-1-maco@android.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
(cherry picked from commit a56587065094fd96eb4c2b5ad65571daad32156d)