[PATCH 2/2] zloop: check for spurious options passed to remove

[Christoph Hellwig <hch@lst.de>]

Zloop uses a command option parser for all control commands,
but most options are only valid for adding a new device.  Check
for incorrectly specified options in the remove handler.

Fixes: eb0570c7df23 ("block: new zoned loop block device driver")
Signed-off-by: Christoph Hellwig <hch@lst.de>
---
 drivers/block/zloop.c | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/drivers/block/zloop.c b/drivers/block/zloop.c
index 56e54d9791f1..51c043342127 100644
--- a/drivers/block/zloop.c
+++ b/drivers/block/zloop.c
@@ -1174,7 +1174,12 @@ static int zloop_ctl_remove(struct zloop_options *opts)
 	int ret;
 
 	if (!(opts->mask & ZLOOP_OPT_ID)) {
-		pr_err("No ID specified\n");
+		pr_err("No ID specified for remove\n");
+		return -EINVAL;
+	}
+
+	if (opts->mask & ~ZLOOP_OPT_ID) {
+		pr_err("Invalid option specified for remove\n");
 		return -EINVAL;
 	}
 
-- 
2.47.3