From 1752fcd4045b4b33fd80b8018848d739043e805a Mon Sep 17 00:00:00 2001 From: Xiaomeng Tong Date: Mon, 28 Mar 2022 11:24:31 +0800 Subject: net: dsa: bcm_sf2_cfp: fix an incorrect NULL check on list iterator [ Upstream commit 6da69b1da130e7d96766042750cd9f902e890eba ] The bug is here: return rule; The list iterator value 'rule' will *always* be set and non-NULL by list_for_each_entry(), so it is incorrect to assume that the iterator value will be NULL if the list is empty or no element is found. To fix the bug, return 'rule' when found, otherwise return NULL. Fixes: ae7a5aff783c7 ("net: dsa: bcm_sf2: Keep copy of inserted rules") Reviewed-by: Vladimir Oltean Reviewed-by: Florian Fainelli Signed-off-by: Xiaomeng Tong Link: https://lore.kernel.org/r/20220328032431.22538-1-xiam0nd.tong@gmail.com Signed-off-by: Jakub Kicinski Signed-off-by: Sasha Levin --- drivers/net/dsa/bcm_sf2_cfp.c | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) (limited to 'drivers/net/dsa/bcm_sf2_cfp.c') diff --git a/drivers/net/dsa/bcm_sf2_cfp.c b/drivers/net/dsa/bcm_sf2_cfp.c index d82cee5d9202..cbf44fc7d03a 100644 --- a/drivers/net/dsa/bcm_sf2_cfp.c +++ b/drivers/net/dsa/bcm_sf2_cfp.c @@ -567,14 +567,14 @@ static void bcm_sf2_cfp_slice_ipv6(struct bcm_sf2_priv *priv, static struct cfp_rule *bcm_sf2_cfp_rule_find(struct bcm_sf2_priv *priv, int port, u32 location) { - struct cfp_rule *rule = NULL; + struct cfp_rule *rule; list_for_each_entry(rule, &priv->cfp.rules_list, next) { if (rule->port == port && rule->fs.location == location) - break; + return rule; } - return rule; + return NULL; } static int bcm_sf2_cfp_rule_cmp(struct bcm_sf2_priv *priv, int port, -- cgit v1.2.3