staging: most: avoid null pointer dereference when iface is null

In the case where the pointer iface is null then the reporting of this error will dereference iface when printing an error message causing which is not ideal. Since the majority of callers to most_register_interface report an error when -EINVAL is returned a simple fix is to just remove the error message, I doubt it will be missed. Addresses-Coverity: ("Dereference after null check") Fixes: 57562a7 ("Staging: most: add MOST driver's core module") Signed-off-by: Colin Ian King <[email protected]> Link: https://lore.kernel.org/r/[email protected] Signed-off-by: Greg Kroah-Hartman <[email protected]>
niw · Jun 25, 2020 · e4463e4 · e4463e4
1 parent 75d0bf8
commit e4463e4
Showing 1 changed file with 1 addition and 3 deletions.
diff --git a/drivers/most/core.c b/drivers/most/core.c
@@ -1283,10 +1283,8 @@ int most_register_interface(struct most_interface *iface)
 	struct most_channel *c;
 
 	if (!iface || !iface->enqueue || !iface->configure ||
-	    !iface->poison_channel || (iface->num_channels > MAX_CHANNELS)) {
-		dev_err(iface->dev, "Bad interface or channel overflow\n");
+	    !iface->poison_channel || (iface->num_channels > MAX_CHANNELS))
 		return -EINVAL;
-	}
 
 	id = ida_simple_get(&mdev_id, 0, 0, GFP_KERNEL);
 	if (id < 0) {