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[ Upstream commit 146180c052a00172f4dc08eaade836fd02f61fb5 ] The "DIV_ROUND_UP(size, PAGE_SIZE)" operation can overflow if "size" is more than ULLONG_MAX - PAGE_SIZE. Link: http://lkml.kernel.org/r/20170322111950.GA11279@mwanda Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com> Cc: Jorgen Hansen <jhansen@vmware.com> Cc: Masahiro Yamada <yamada.masahiro@socionext.com> Cc: Michal Hocko <mhocko@suse.com> Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org> Signed-off-by: Sasha Levin <alexander.levin@microsoft.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>