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Miller" , Eric Dumazet , Jakub Kicinski , Paolo Abeni , Cosmin Ratiu , Mark Bloch , Vlad Dogaru , netdev@vger.kernel.org, linux-rdma@vger.kernel.org, linux-kernel@vger.kernel.org, kernel-janitors@vger.kernel.org Subject: [PATCH v2 net] net/mlx5: HWS, Add error checking to hws_bwc_rule_complex_hash_node_get() Message-ID: Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Disposition: inline X-Mailer: git-send-email haha only kidding Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" Check for if ida_alloc() or rhashtable_lookup_get_insert_fast() fails. Fixes: 17e0accac577 ("net/mlx5: HWS, support complex matchers") Signed-off-by: Dan Carpenter Reviewed-by: Yevgeny Kliteynik --- v2: Add error checking for ida_alloc() and add cleanup. .../mlx5/core/steering/hws/bwc_complex.c | 19 +++++++++++++++++-- 1 file changed, 17 insertions(+), 2 deletions(-) diff --git a/drivers/net/ethernet/mellanox/mlx5/core/steering/hws/bwc_compl= ex.c b/drivers/net/ethernet/mellanox/mlx5/core/steering/hws/bwc_complex.c index 70768953a4f6..ca7501c57468 100644 --- a/drivers/net/ethernet/mellanox/mlx5/core/steering/hws/bwc_complex.c +++ b/drivers/net/ethernet/mellanox/mlx5/core/steering/hws/bwc_complex.c @@ -1070,7 +1070,7 @@ hws_bwc_rule_complex_hash_node_get(struct mlx5hws_bwc= _rule *bwc_rule, struct mlx5hws_bwc_matcher *bwc_matcher =3D bwc_rule->bwc_matcher; struct mlx5hws_bwc_complex_rule_hash_node *node, *old_node; struct rhashtable *refcount_hash; - int i; + int ret, i; =20 bwc_rule->complex_hash_node =3D NULL; =20 @@ -1078,7 +1078,11 @@ hws_bwc_rule_complex_hash_node_get(struct mlx5hws_bw= c_rule *bwc_rule, if (unlikely(!node)) return -ENOMEM; =20 - node->tag =3D ida_alloc(&bwc_matcher->complex->metadata_ida, GFP_KERNEL); + ret =3D ida_alloc(&bwc_matcher->complex->metadata_ida, GFP_KERNEL); + if (ret < 0) + goto err_free_node; + node->tag =3D ret; + refcount_set(&node->refcount, 1); =20 /* Clear match buffer - turn off all the unrelated fields @@ -1094,6 +1098,11 @@ hws_bwc_rule_complex_hash_node_get(struct mlx5hws_bw= c_rule *bwc_rule, old_node =3D rhashtable_lookup_get_insert_fast(refcount_hash, &node->hash_node, hws_refcount_hash); + if (IS_ERR(old_node)) { + ret =3D PTR_ERR(old_node); + goto err_free_ida; + } + if (old_node) { /* Rule with the same tag already exists - update refcount */ refcount_inc(&old_node->refcount); @@ -1112,6 +1121,12 @@ hws_bwc_rule_complex_hash_node_get(struct mlx5hws_bw= c_rule *bwc_rule, =20 bwc_rule->complex_hash_node =3D node; return 0; + +err_free_ida: + ida_free(&bwc_matcher->complex->metadata_ida, node->tag); +err_free_node: + kfree(node); + return ret; } =20 static void --=20 2.47.2