dm: eliminate potential source of excessive kernel log noise

There wasn't ever a real need to log an error in the kernel log for ioctls issued with insufficient permissions. Simply return an error and if an admin/user is sufficiently motivated they can enable DM's dynamic debugging to see an explanation for why the ioctls were disallowed. Reported-by: Nir Soffer <[email protected]> Fixes: e980f62 ("dm: don't allow ioctls to targets that don't map to whole devices") Signed-off-by: Mike Snitzer <[email protected]>
sm00th · Jan 8, 2021 · 0378c62 · 0378c62
1 parent fcc4233
commit 0378c62
Showing 1 changed file with 1 addition and 1 deletion.
diff --git a/drivers/md/dm.c b/drivers/md/dm.c
@@ -562,7 +562,7 @@ static int dm_blk_ioctl(struct block_device *bdev, fmode_t mode,
 		 * subset of the parent bdev; require extra privileges.
 		 */
 		if (!capable(CAP_SYS_RAWIO)) {
-			DMWARN_LIMIT(
+			DMDEBUG_LIMIT(
 	"%s: sending ioctl %x to DM device without required privilege.",
 				current->comm, cmd);
 			r = -ENOIOCTLCMD;