rss_set_prep_indir() compares the new indirection table against the
current one to determine whether any update is needed. The memcmp
call passes data->indir_size as the length argument, but indir_size
is the number of u32 entries, not the byte count.

Fixes: c0ae03588bbb ("ethtool: rss: initial RSS_SET (indirection table handling)")
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
---
CC: andrew@lunn.ch
CC: gal@nvidia.com
---
 net/ethtool/rss.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/net/ethtool/rss.c b/net/ethtool/rss.c
index a16ee1e8e640..458a4a7907e4 100644
--- a/net/ethtool/rss.c
+++ b/net/ethtool/rss.c

@@ -686,7 +686,7 @@ rss_set_prep_indir(struct net_device *dev, struct genl_info *info,
 				ethtool_rxfh_indir_default(i, num_rx_rings);
 	}
 
-	*mod |= memcmp(rxfh->indir, data->indir_table, data->indir_size);
+	*mod |= memcmp(rxfh->indir, data->indir_table, alloc_size);
 
 	return user_size;
 

-- 
2.54.0