Commit 8286d6b1 authored Feb 22, 2017 by Vlad Tsyrklevich Committed by David Teigland Aug 07, 2017

dlm: Fix kernel memory disclosure



Clear the 'unused' field and the uninitialized padding in 'lksb' to
avoid leaking memory to userland in copy_result_to_user().

Signed-off-by: Vlad Tsyrklevich <vlad@tsyrklevich.net>
Signed-off-by: David Teigland <teigland@redhat.com>

parent aae4e7a8

fs/dlm/user.c

+2 −0

Original line number	Diff line number	Diff line
		@@ -123,6 +123,8 @@ static void compat_input(struct dlm_write_request *kb,
		static void compat_output(struct dlm_lock_result *res,
		struct dlm_lock_result32 *res32)
		{
		memset(res32, 0, sizeof(*res32));

		res32->version[0] = res->version[0];
		res32->version[1] = res->version[1];
		res32->version[2] = res->version[2];