tree 801d79540e6ca2c9746c6d4fc27881a91124e53b
parent b8c0e15469bab732065e64f7dffadab0b7103990
author Daniel Rosenberg <drosen@google.com> 1535670586 -0700
committer Greg Kroah-Hartman <gregkh@linuxfoundation.org> 1536132011 +0200

staging: android: ion: check for kref overflow

This patch is against 4.9. It does not apply to master due to a large
rework of ion in 4.12 which removed the affected functions altogther.
4c23cbff073f3b9b ("staging: android: ion: Remove import interface")

Userspace can cause the kref to handles to increment
arbitrarily high. Ensure it does not overflow.

Signed-off-by: Daniel Rosenberg <drosen@google.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>