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authorSven Eckelmann <sven@narfation.org>2012-08-20 23:37:26 +0200
committerAntonio Quartulli <ordex@autistici.org>2012-10-29 09:42:36 +0100
commitbd5b80d51a6c4a68f7d4b9b92c495329f47e53d4 (patch)
tree8650acb5b824f001651186e1357f4b7666437330 /net/batman-adv/icmp_socket.c
parent8e7c15d6b5468f0dcdd887db1e5df88e629c00d6 (diff)
downloadblackbird-op-linux-bd5b80d51a6c4a68f7d4b9b92c495329f47e53d4.tar.gz
blackbird-op-linux-bd5b80d51a6c4a68f7d4b9b92c495329f47e53d4.zip
batman-adv: Check return value of try_module_get
New operations should not be started when they need an increased module reference counter and try_module_get failed. This patch addresses Coverity #712284: Unchecked return value Signed-off-by: Sven Eckelmann <sven@narfation.org> Signed-off-by: Antonio Quartulli <ordex@autistici.org>
Diffstat (limited to 'net/batman-adv/icmp_socket.c')
-rw-r--r--net/batman-adv/icmp_socket.c12
1 files changed, 8 insertions, 4 deletions
diff --git a/net/batman-adv/icmp_socket.c b/net/batman-adv/icmp_socket.c
index bde3cf747507..5874c0e84846 100644
--- a/net/batman-adv/icmp_socket.c
+++ b/net/batman-adv/icmp_socket.c
@@ -42,12 +42,16 @@ static int batadv_socket_open(struct inode *inode, struct file *file)
unsigned int i;
struct batadv_socket_client *socket_client;
+ if (!try_module_get(THIS_MODULE))
+ return -EBUSY;
+
nonseekable_open(inode, file);
socket_client = kmalloc(sizeof(*socket_client), GFP_KERNEL);
-
- if (!socket_client)
+ if (!socket_client) {
+ module_put(THIS_MODULE);
return -ENOMEM;
+ }
for (i = 0; i < ARRAY_SIZE(batadv_socket_client_hash); i++) {
if (!batadv_socket_client_hash[i]) {
@@ -59,6 +63,7 @@ static int batadv_socket_open(struct inode *inode, struct file *file)
if (i == ARRAY_SIZE(batadv_socket_client_hash)) {
pr_err("Error - can't add another packet client: maximum number of clients reached\n");
kfree(socket_client);
+ module_put(THIS_MODULE);
return -EXFULL;
}
@@ -71,7 +76,6 @@ static int batadv_socket_open(struct inode *inode, struct file *file)
file->private_data = socket_client;
- batadv_inc_module_count();
return 0;
}
@@ -96,7 +100,7 @@ static int batadv_socket_release(struct inode *inode, struct file *file)
spin_unlock_bh(&socket_client->lock);
kfree(socket_client);
- batadv_dec_module_count();
+ module_put(THIS_MODULE);
return 0;
}
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