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Miller" , Eric Dumazet , Jakub Kicinski , Paolo Abeni , , , Subject: [PATCH] mlxsw_spectrum_router: add check for return value of 'mlxsw_sp_rif_find_by_dev' Date: Fri, 17 Feb 2023 17:09:39 +0300 Message-ID: <20230217140939.487978-1-n.petrova@fintech.ru> X-Mailer: git-send-email 2.34.1 MIME-Version: 1.0 X-Originating-IP: [10.0.253.125] X-ClientProxiedBy: Ex16-01.fintech.ru (10.0.10.18) To Ex16-01.fintech.ru (10.0.10.18) X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00,SPF_HELO_NONE, SPF_PASS autolearn=ham autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org X-getmail-retrieved-from-mailbox: =?utf-8?q?INBOX?= X-GMAIL-THRID: =?utf-8?q?1758087819199390454?= X-GMAIL-MSGID: =?utf-8?q?1758087819199390454?= Pointer 'rif' that contains the return value of 'mlxsw_sp_rif_find_by_dev' is checked for NULL to avoid possible undefined behavior below caused by dereference in 'mlxsw_sp_rif_destroy'. Found by Linux Verification Center (linuxtesting.org) with SVACE. Fixes: e4f3c1c17b6d ("mlxsw: spectrum_router: Implement common RIF core") Signed-off-by: Natalia Petrova --- drivers/net/ethernet/mellanox/mlxsw/spectrum_router.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/drivers/net/ethernet/mellanox/mlxsw/spectrum_router.c b/drivers/net/ethernet/mellanox/mlxsw/spectrum_router.c index 2c4443c6b964..4f41b83d7c9e 100644 --- a/drivers/net/ethernet/mellanox/mlxsw/spectrum_router.c +++ b/drivers/net/ethernet/mellanox/mlxsw/spectrum_router.c @@ -8658,7 +8658,8 @@ static int mlxsw_sp_inetaddr_bridge_event(struct mlxsw_sp *mlxsw_sp, break; case NETDEV_DOWN: rif = mlxsw_sp_rif_find_by_dev(mlxsw_sp, l3_dev); - mlxsw_sp_rif_destroy(rif); + if (rif) + mlxsw_sp_rif_destroy(rif); break; }