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net: liquidio: Add missing null pointer checks
The functions send_rx_ctrl_cmd() in both liquidio/lio_main.c and liquidio/lio_vf_main.c do not check if the call to octeon_alloc_soft_command() fails and returns a null pointer. Both functions also return void so errors are not propagated back to the caller. Fix these issues by updating both instances of send_rx_ctrl_cmd() to return an integer rather than void, and have them return -ENOMEM if an allocation failure occurs. Also update all callers of send_rx_ctrl_cmd() so that they now check the return value. Cc: David S. Miller <davem@davemloft.net> Signed-off-by: Tom Seewald <tseewald@gmail.com> Link: https://lore.kernel.org/r/20210503115736.2104747-66-gregkh@linuxfoundation.org Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Tom Seewald
Greg Kroah-Hartman
parent
4fd798a5a8
commit
dbc97bfd39
2 changed files with 40 additions and 15 deletions
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@ -1153,7 +1153,7 @@ static void octeon_destroy_resources(struct octeon_device *oct)
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* @lio: per-network private data
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* @start_stop: whether to start or stop
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*/
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static void send_rx_ctrl_cmd(struct lio *lio, int start_stop)
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static int send_rx_ctrl_cmd(struct lio *lio, int start_stop)
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{
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struct octeon_soft_command *sc;
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union octnet_cmd *ncmd;
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@ -1161,11 +1161,16 @@ static void send_rx_ctrl_cmd(struct lio *lio, int start_stop)
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int retval;
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if (oct->props[lio->ifidx].rx_on == start_stop)
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return;
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return 0;
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sc = (struct octeon_soft_command *)
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octeon_alloc_soft_command(oct, OCTNET_CMD_SIZE,
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16, 0);
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if (!sc) {
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netif_info(lio, rx_err, lio->netdev,
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"Failed to allocate octeon_soft_command struct\n");
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return -ENOMEM;
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}
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ncmd = (union octnet_cmd *)sc->virtdptr;
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@ -1187,18 +1192,19 @@ static void send_rx_ctrl_cmd(struct lio *lio, int start_stop)
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if (retval == IQ_SEND_FAILED) {
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netif_info(lio, rx_err, lio->netdev, "Failed to send RX Control message\n");
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octeon_free_soft_command(oct, sc);
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return;
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} else {
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/* Sleep on a wait queue till the cond flag indicates that the
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* response arrived or timed-out.
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*/
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retval = wait_for_sc_completion_timeout(oct, sc, 0);
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if (retval)
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return;
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return retval;
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oct->props[lio->ifidx].rx_on = start_stop;
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WRITE_ONCE(sc->caller_is_done, true);
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}
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return retval;
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}
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/**
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@ -1773,6 +1779,7 @@ static int liquidio_open(struct net_device *netdev)
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struct octeon_device_priv *oct_priv =
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(struct octeon_device_priv *)oct->priv;
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struct napi_struct *napi, *n;
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int ret = 0;
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if (oct->props[lio->ifidx].napi_enabled == 0) {
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tasklet_disable(&oct_priv->droq_tasklet);
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@ -1808,7 +1815,9 @@ static int liquidio_open(struct net_device *netdev)
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netif_info(lio, ifup, lio->netdev, "Interface Open, ready for traffic\n");
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/* tell Octeon to start forwarding packets to host */
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send_rx_ctrl_cmd(lio, 1);
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ret = send_rx_ctrl_cmd(lio, 1);
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if (ret)
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return ret;
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/* start periodical statistics fetch */
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INIT_DELAYED_WORK(&lio->stats_wk.work, lio_fetch_stats);
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@ -1819,7 +1828,7 @@ static int liquidio_open(struct net_device *netdev)
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dev_info(&oct->pci_dev->dev, "%s interface is opened\n",
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netdev->name);
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return 0;
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return ret;
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}
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/**
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@ -1833,6 +1842,7 @@ static int liquidio_stop(struct net_device *netdev)
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struct octeon_device_priv *oct_priv =
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(struct octeon_device_priv *)oct->priv;
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struct napi_struct *napi, *n;
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int ret = 0;
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ifstate_reset(lio, LIO_IFSTATE_RUNNING);
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@ -1849,7 +1859,9 @@ static int liquidio_stop(struct net_device *netdev)
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lio->link_changes++;
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/* Tell Octeon that nic interface is down. */
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send_rx_ctrl_cmd(lio, 0);
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ret = send_rx_ctrl_cmd(lio, 0);
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if (ret)
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return ret;
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if (OCTEON_CN23XX_PF(oct)) {
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if (!oct->msix_on)
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@ -1884,7 +1896,7 @@ static int liquidio_stop(struct net_device *netdev)
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dev_info(&oct->pci_dev->dev, "%s interface is stopped\n", netdev->name);
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return 0;
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return ret;
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}
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/**
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@ -595,7 +595,7 @@ static void octeon_destroy_resources(struct octeon_device *oct)
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* @lio: per-network private data
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* @start_stop: whether to start or stop
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*/
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static void send_rx_ctrl_cmd(struct lio *lio, int start_stop)
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static int send_rx_ctrl_cmd(struct lio *lio, int start_stop)
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{
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struct octeon_device *oct = (struct octeon_device *)lio->oct_dev;
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struct octeon_soft_command *sc;
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@ -603,11 +603,16 @@ static void send_rx_ctrl_cmd(struct lio *lio, int start_stop)
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int retval;
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if (oct->props[lio->ifidx].rx_on == start_stop)
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return;
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return 0;
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sc = (struct octeon_soft_command *)
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octeon_alloc_soft_command(oct, OCTNET_CMD_SIZE,
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16, 0);
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if (!sc) {
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netif_info(lio, rx_err, lio->netdev,
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"Failed to allocate octeon_soft_command struct\n");
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return -ENOMEM;
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}
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ncmd = (union octnet_cmd *)sc->virtdptr;
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@ -635,11 +640,13 @@ static void send_rx_ctrl_cmd(struct lio *lio, int start_stop)
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*/
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retval = wait_for_sc_completion_timeout(oct, sc, 0);
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if (retval)
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return;
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return retval;
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oct->props[lio->ifidx].rx_on = start_stop;
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WRITE_ONCE(sc->caller_is_done, true);
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}
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return retval;
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}
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/**
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@ -906,6 +913,7 @@ static int liquidio_open(struct net_device *netdev)
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struct octeon_device_priv *oct_priv =
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(struct octeon_device_priv *)oct->priv;
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struct napi_struct *napi, *n;
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int ret = 0;
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if (!oct->props[lio->ifidx].napi_enabled) {
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tasklet_disable(&oct_priv->droq_tasklet);
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@ -932,11 +940,13 @@ static int liquidio_open(struct net_device *netdev)
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(LIQUIDIO_NDEV_STATS_POLL_TIME_MS));
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/* tell Octeon to start forwarding packets to host */
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send_rx_ctrl_cmd(lio, 1);
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ret = send_rx_ctrl_cmd(lio, 1);
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if (ret)
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return ret;
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dev_info(&oct->pci_dev->dev, "%s interface is opened\n", netdev->name);
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return 0;
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return ret;
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}
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/**
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@ -950,9 +960,12 @@ static int liquidio_stop(struct net_device *netdev)
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struct octeon_device_priv *oct_priv =
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(struct octeon_device_priv *)oct->priv;
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struct napi_struct *napi, *n;
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int ret = 0;
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/* tell Octeon to stop forwarding packets to host */
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send_rx_ctrl_cmd(lio, 0);
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ret = send_rx_ctrl_cmd(lio, 0);
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if (ret)
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return ret;
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netif_info(lio, ifdown, lio->netdev, "Stopping interface!\n");
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/* Inform that netif carrier is down */
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@ -986,7 +999,7 @@ static int liquidio_stop(struct net_device *netdev)
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dev_info(&oct->pci_dev->dev, "%s interface is stopped\n", netdev->name);
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return 0;
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return ret;
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}
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/**
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