sock_init_data() attaches the allocated sk object to the provided sock
object. If ieee802154_create() fails later, the allocated sk object is
freed, but the dangling pointer remains in the provided sock object, which
may allow use-after-free.
Clear the sk pointer in the sock object on error.
Signed-off-by: Ignat Korchagin <ignat@xxxxxxxxxxxxxx>
Reviewed-by: Miquel Raynal <miquel.raynal@xxxxxxxxxxx>
---
net/ieee802154/socket.c | 12 +++++++-----
1 file changed, 7 insertions(+), 5 deletions(-)
diff --git a/net/ieee802154/socket.c b/net/ieee802154/socket.c
index 990a83455dcf..18d267921bb5 100644
--- a/net/ieee802154/socket.c
+++ b/net/ieee802154/socket.c
@@ -1043,19 +1043,21 @@ static int ieee802154_create(struct net *net, struct socket *sock,
if (sk->sk_prot->hash) {
rc = sk->sk_prot->hash(sk);
- if (rc) {
- sk_common_release(sk);
- goto out;
- }
+ if (rc)
+ goto out_sk_release;
}
if (sk->sk_prot->init) {
rc = sk->sk_prot->init(sk);
if (rc)
- sk_common_release(sk);
+ goto out_sk_release;
}
out:
return rc;
+out_sk_release:
+ sk_common_release(sk);
+ sock->sk = NULL;
+ goto out;
}
static const struct net_proto_family ieee802154_family_ops = {
--
2.39.5
