Commit 2ca4c92f authored by Alasdair G Kergon's avatar Alasdair G Kergon
Browse files

dm ioctl: prevent empty message 



Detect invalid empty messages in core dm instead of requiring every target to
check this.

Signed-off-by: default avatarAlasdair G Kergon <agk@redhat.com>
parent 13c87583

drivers/md/dm-ioctl.c

+5 −0
Original line number Diff line number Diff line
@@ -1402,6 +1402,11 @@ static int target_message(struct dm_ioctl *param, size_t param_size) 
		goto out;

	}



	if (!argc) {

		DMWARN("Empty message received.");

		goto out;

	}



	table = dm_get_live_table(md);

	if (!table)

		goto out_argv;