can: af_can: can_pernet_init(): add missing error handling for kzalloc returning...

This patch adds the missing check and error handling for out-of-memory
situations, when kzalloc cannot allocate memory.

Fixes: cb5635a36776 ("can: complete initial namespace support")
Acked-by: Oliver Hartkopp <socketcan@hartkopp.net>
Cc: linux-stable <stable@vger.kernel.org>
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>

diff --git a/net/can/af_can.c b/net/can/af_can.c
index eb1ad74b40f43dff47b12d6139a76f6e77226fa8..ecd5c703d11e85c32eaee87321af56da03e7e07d 100644 (file)
--- a/net/can/af_can.c
+++ b/net/can/af_can.c
@@ -875,9 +875,14 @@ static int can_pernet_init(struct net *net)
        spin_lock_init(&net->can.can_rcvlists_lock);
        net->can.can_rx_alldev_list =
                kzalloc(sizeof(struct dev_rcv_lists), GFP_KERNEL);
-
+       if (!net->can.can_rx_alldev_list)
+               goto out;
        net->can.can_stats = kzalloc(sizeof(struct s_stats), GFP_KERNEL);
+       if (!net->can.can_stats)
+               goto out_free_alldev_list;
        net->can.can_pstats = kzalloc(sizeof(struct s_pstats), GFP_KERNEL);
+       if (!net->can.can_pstats)
+               goto out_free_can_stats;
 
        if (IS_ENABLED(CONFIG_PROC_FS)) {
                /* the statistics are updated every second (timer triggered) */
@@ -892,6 +897,13 @@ static int can_pernet_init(struct net *net)
        }
 
        return 0;
+
+ out_free_can_stats:
+       kfree(net->can.can_stats);
+ out_free_alldev_list:
+       kfree(net->can.can_rx_alldev_list);
+ out:
+       return -ENOMEM;
 }
 
 static void can_pernet_exit(struct net *net)