netfilter: nf_tables: bogus ENOENT when destroying element which does not exist

[ Upstream commit a7d5a955bfa854ac6b0c53aaf933394b4e6139e4 ]

destroy element command bogusly reports ENOENT in case a set element
does not exist. ENOENT errors are skipped, however, err is still set
and propagated to userspace.

 # nft destroy element ip raw BLACKLIST { 1.2.3.4 }
 Error: Could not process rule: No such file or directory
 destroy element ip raw BLACKLIST { 1.2.3.4 }
 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

Fixes: f80a612dd77c ("netfilter: nf_tables: add support to destroy operation")
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>

diff --git a/net/netfilter/nf_tables_api.c b/net/netfilter/nf_tables_api.c
index 3bf428a..3807c6c 100644 (file)
--- a/net/netfilter/nf_tables_api.c
+++ b/net/netfilter/nf_tables_api.c
@@ -7205,10 +7205,11 @@ static int nf_tables_delsetelem(struct sk_buff *skb,
 
                if (err < 0) {
                        NL_SET_BAD_ATTR(extack, attr);
-                       break;
+                       return err;
                }
        }
-       return err;
+
+       return 0;
 }
 
 /*