net: ethtool: correct MAX attribute value for stats

JIRA: https://issues.redhat.com/browse/RHEL-46358
Upstream Status: net.git commit 52f7960

commit 52f7960
Author: Jakub Kicinski <kuba@kernel.org>
Date:   Thu Jun 8 09:23:44 2023 -0700

    net: ethtool: correct MAX attribute value for stats

    When compiling YNL generated code compiler complains about
    array-initializer-out-of-bounds. Turns out the MAX value
    for STATS_GRP uses the value for STATS.

    This may lead to random corruptions in user space (kernel
    itself doesn't use this value as it never parses stats).

    Fixes: f09ea6f ("ethtool: add a new command for reading standard stats")
    Signed-off-by: Jakub Kicinski <kuba@kernel.org>
    Reviewed-by: David Ahern <dsahern@kernel.org>
    Signed-off-by: David S. Miller <davem@davemloft.net>

Signed-off-by: Davide Caratti <dcaratti@redhat.com>

Author: dcaratti

include/uapi/linux/ethtool_netlink.h

@@ -783,7 +783,7 @@ enum {
 
 	/* add new constants above here */
 	__ETHTOOL_A_STATS_GRP_CNT,
-	ETHTOOL_A_STATS_GRP_MAX = (__ETHTOOL_A_STATS_CNT - 1)
+	ETHTOOL_A_STATS_GRP_MAX = (__ETHTOOL_A_STATS_GRP_CNT - 1)
 };
 
 enum {