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authorTom Rix <trix@redhat.com>2022-03-05 10:13:46 -0800
committerDavid S. Miller <davem@davemloft.net>2022-03-07 12:26:53 +0000
commit57d29a2935c9aab0aaef6264bf6a58aad3859e7c (patch)
tree14dd865f56e08c9e7d6aa5ea9c15d841c004cb18 /net/core
parentcd5169841c49dab75ecc3b20b3bd1100395b6909 (diff)
net: rtnetlink: fix error handling in rtnl_fill_statsinfo()
The clang static analyzer reports this issue rtnetlink.c:5481:2: warning: Undefined or garbage value returned to caller return err; ^~~~~~~~~~ There is a function level err variable, in the list_for_each_entry_rcu block there is a shadow err. Remove the shadow. In the same block, the call to nla_nest_start_noflag() can fail without setting an err. Set the err to -EMSGSIZE. Fixes: 216e690631f5 ("net: rtnetlink: rtnl_fill_statsinfo(): Permit non-EMSGSIZE error returns") Signed-off-by: Tom Rix <trix@redhat.com> Reviewed-by: Ido Schimmel <idosch@nvidia.com> Reviewed-by: Petr Machata <petrm@nvidia.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/core')
-rw-r--r--net/core/rtnetlink.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/net/core/rtnetlink.c b/net/core/rtnetlink.c
index a66b6761b88b..a759f9e0a847 100644
--- a/net/core/rtnetlink.c
+++ b/net/core/rtnetlink.c
@@ -5440,12 +5440,12 @@ static int rtnl_fill_statsinfo(struct sk_buff *skb, struct net_device *dev,
list_for_each_entry_rcu(af_ops, &rtnl_af_ops, list) {
if (af_ops->fill_stats_af) {
struct nlattr *af;
- int err;
af = nla_nest_start_noflag(skb,
af_ops->family);
if (!af) {
rcu_read_unlock();
+ err = -EMSGSIZE;
goto nla_put_failure;
}
err = af_ops->fill_stats_af(skb, dev);