| Message ID | 20210818155210.14522-1-tim.gardner@canonical.com |
|---|---|
| State | New |
| Headers | show |
| Series | [linux-next] net/mlx5: Bridge, fix uninitialized variable in mlx5_esw_bridge_port_changeupper() | expand |
On Wed 18 Aug 2021 at 18:52, Tim Gardner <tim.gardner@canonical.com> wrote: > A recent change removed code that initialized the return code variable 'err'. It > is now possible for mlx5_esw_bridge_port_changeupper() to return an error code > using this uninitialized variable. Fix it by initializing to 0. > > Addresses-Coverity: ("Uninitialized scalar variable (UNINIT)") > > Cc: Saeed Mahameed <saeedm@nvidia.com> > Cc: Leon Romanovsky <leon@kernel.org> > Cc: "David S. Miller" <davem@davemloft.net> > Cc: Jakub Kicinski <kuba@kernel.org> > Cc: Vlad Buslov <vladbu@nvidia.com> > Cc: Jianbo Liu <jianbol@nvidia.com> > Cc: Mark Bloch <mbloch@nvidia.com> > Cc: Roi Dayan <roid@nvidia.com> > Cc: Vladimir Oltean <vladimir.oltean@nxp.com> > Cc: netdev@vger.kernel.org > Cc: linux-rdma@vger.kernel.org > Cc: linux-kernel@vger.kernel.org > Signed-off-by: Tim Gardner <tim.gardner@canonical.com> > --- Tim, thanks for fixing this! Saeed, this is the second similar issue that I mentioned in my reply to Colin. Again, I've already submitted same patch internally and this one is as good as mine. Reviewed-by: Vlad Buslov <vladbu@nvidia.com> [...]
On Wed, 2021-08-18 at 19:47 +0300, Vlad Buslov wrote: > On Wed 18 Aug 2021 at 18:52, Tim Gardner <tim.gardner@canonical.com> > wrote: > > A recent change removed code that initialized the return code > > variable 'err'. It > > is now possible for mlx5_esw_bridge_port_changeupper() to return an > > error code > > using this uninitialized variable. Fix it by initializing to 0. > > > > Addresses-Coverity: ("Uninitialized scalar variable (UNINIT)") > > > > Cc: Saeed Mahameed <saeedm@nvidia.com> > > Cc: Leon Romanovsky <leon@kernel.org> > > Cc: "David S. Miller" <davem@davemloft.net> > > Cc: Jakub Kicinski <kuba@kernel.org> > > Cc: Vlad Buslov <vladbu@nvidia.com> > > Cc: Jianbo Liu <jianbol@nvidia.com> > > Cc: Mark Bloch <mbloch@nvidia.com> > > Cc: Roi Dayan <roid@nvidia.com> > > Cc: Vladimir Oltean <vladimir.oltean@nxp.com> > > Cc: netdev@vger.kernel.org > > Cc: linux-rdma@vger.kernel.org > > Cc: linux-kernel@vger.kernel.org Just wondering, do we really need 12 inline CCs for fixing a poor coverity? > > Signed-off-by: Tim Gardner <tim.gardner@canonical.com> > > --- > > Tim, thanks for fixing this! > > Saeed, this is the second similar issue that I mentioned in my reply > to > Colin. Again, I've already submitted same patch internally and this > one > is as good as mine. I don't mind both patches are perfect. > > Reviewed-by: Vlad Buslov <vladbu@nvidia.com> > > [...] > >
diff --git a/drivers/net/ethernet/mellanox/mlx5/core/en/rep/bridge.c b/drivers/net/ethernet/mellanox/mlx5/core/en/rep/bridge.c index 0c38c2e319be..c6435c69b7c4 100644 --- a/drivers/net/ethernet/mellanox/mlx5/core/en/rep/bridge.c +++ b/drivers/net/ethernet/mellanox/mlx5/core/en/rep/bridge.c @@ -137,7 +137,7 @@ static int mlx5_esw_bridge_port_changeupper(struct notifier_block *nb, void *ptr u16 vport_num, esw_owner_vhca_id; struct netlink_ext_ack *extack; int ifindex = upper->ifindex; - int err; + int err = 0; if (!netif_is_bridge_master(upper)) return 0;
A recent change removed code that initialized the return code variable 'err'. It is now possible for mlx5_esw_bridge_port_changeupper() to return an error code using this uninitialized variable. Fix it by initializing to 0. Addresses-Coverity: ("Uninitialized scalar variable (UNINIT)") Cc: Saeed Mahameed <saeedm@nvidia.com> Cc: Leon Romanovsky <leon@kernel.org> Cc: "David S. Miller" <davem@davemloft.net> Cc: Jakub Kicinski <kuba@kernel.org> Cc: Vlad Buslov <vladbu@nvidia.com> Cc: Jianbo Liu <jianbol@nvidia.com> Cc: Mark Bloch <mbloch@nvidia.com> Cc: Roi Dayan <roid@nvidia.com> Cc: Vladimir Oltean <vladimir.oltean@nxp.com> Cc: netdev@vger.kernel.org Cc: linux-rdma@vger.kernel.org Cc: linux-kernel@vger.kernel.org Signed-off-by: Tim Gardner <tim.gardner@canonical.com> --- drivers/net/ethernet/mellanox/mlx5/core/en/rep/bridge.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)