diff mbox series

[5.4,71/76] dm: eliminate potential source of excessive kernel log noise

Message ID 20210118113344.360994758@linuxfoundation.org
State Superseded
Headers show
Series None | expand

Commit Message

gregkh@linuxfoundation.org Jan. 18, 2021, 11:35 a.m. UTC 
From: Mike Snitzer <snitzer@redhat.com>

commit 0378c625afe80eb3f212adae42cc33c9f6f31abf upstream.

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 <nsoffer@redhat.com>
Fixes: e980f62353c6 ("dm: don't allow ioctls to targets that don't map to whole devices")
Signed-off-by: Mike Snitzer <snitzer@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
 drivers/md/dm.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
diff mbox series

Patch

--- a/drivers/md/dm.c
+++ b/drivers/md/dm.c
@@ -548,7 +548,7 @@  static int dm_blk_ioctl(struct block_dev
 		 * 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;