net: ethtool: reject unsupported RSS input xfrm values

RXFH input_xfrm currently has three supported values: 0 (clear all), symmetric_xor and NO_CHANGE. Reject any other value sent from user-space. Fixes: 13e5934 ("net: ethtool: add support for symmetric-xor RSS hash") Suggested-by: Jakub Kicinski <[email protected]> Signed-off-by: Ahmed Zaki <[email protected]> Link: https://lore.kernel.org/r/[email protected] Signed-off-by: Jakub Kicinski <[email protected]>
chewitt · Jan 6, 2024 · 948f97f · 948f97f
1 parent 2114e83
commit 948f97f
Showing 1 changed file with 3 additions and 0 deletions.
diff --git a/net/ethtool/ioctl.c b/net/ethtool/ioctl.c
@@ -1302,6 +1302,9 @@ static noinline_for_stack int ethtool_set_rxfh(struct net_device *dev,
 	if (rxfh.rss_context && !ops->cap_rss_ctx_supported)
 		return -EOPNOTSUPP;
 	/* Check input data transformation capabilities */
+	if (rxfh.input_xfrm && rxfh.input_xfrm != RXH_XFRM_SYM_XOR &&
+	    rxfh.input_xfrm != RXH_XFRM_NO_CHANGE)
+		return -EINVAL;
 	if ((rxfh.input_xfrm & RXH_XFRM_SYM_XOR) &&
 	    !ops->cap_rss_sym_xor_supported)
 		return -EOPNOTSUPP;