net/can: single_open_net needs to be paired with single_release_net

Otherwise we will leak a reference to the network namespace.
Signed-off-by: Christoph Hellwig <hch@lst.de>

net/can/bcm.c

@@ -249,7 +249,7 @@ static const struct file_operations bcm_proc_fops = {
 	.open		= bcm_proc_open,
 	.read		= seq_read,
 	.llseek		= seq_lseek,
-	.release	= single_release,
+	.release	= single_release_net,
 };
 #endif /* CONFIG_PROC_FS */
 

net/can/proc.c

@@ -279,7 +279,7 @@ static const struct file_operations can_stats_proc_fops = {
 	.open		= can_stats_proc_open,
 	.read		= seq_read,
 	.llseek		= seq_lseek,
-	.release	= single_release,
+	.release	= single_release_net,
 };
 
 static int can_reset_stats_proc_show(struct seq_file *m, void *v)
@@ -449,7 +449,7 @@ static const struct file_operations can_rcvlist_sff_proc_fops = {
 	.open		= can_rcvlist_sff_proc_open,
 	.read		= seq_read,
 	.llseek		= seq_lseek,
-	.release	= single_release,
+	.release	= single_release_net,
 };
 
 
@@ -492,7 +492,7 @@ static const struct file_operations can_rcvlist_eff_proc_fops = {
 	.open		= can_rcvlist_eff_proc_open,
 	.read		= seq_read,
 	.llseek		= seq_lseek,
-	.release	= single_release,
+	.release	= single_release_net,
 };
 
 /*