From: Kuniyuki Iwashima kuniyu@amazon.com
commit 6431b0f6ff1633ae598667e4cdd93830074a03e8 upstream.
After commit d38afeec26ed ("tcp/udp: Call inet6_destroy_sock() in IPv6 sk->sk_destruct()."), we call inet6_destroy_sock() in sk->sk_destruct() by setting inet6_sock_destruct() to it to make sure we do not leak inet6-specific resources.
SCTP sets its own sk->sk_destruct() in the sctp_init_sock(), and SCTPv6 socket reuses it as the init function.
To call inet6_sock_destruct() from SCTPv6 sk->sk_destruct(), we set sctp_v6_destruct_sock() in a new init function.
Signed-off-by: Kuniyuki Iwashima kuniyu@amazon.com Signed-off-by: David S. Miller davem@davemloft.net Signed-off-by: Ziyang Xuan william.xuanziyang@huawei.com Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- net/sctp/socket.c | 29 +++++++++++++++++++++-------- 1 file changed, 21 insertions(+), 8 deletions(-)
--- a/net/sctp/socket.c +++ b/net/sctp/socket.c @@ -4497,13 +4497,17 @@ static void sctp_destroy_sock(struct soc }
/* Triggered when there are no references on the socket anymore */ -static void sctp_destruct_sock(struct sock *sk) +static void sctp_destruct_common(struct sock *sk) { struct sctp_sock *sp = sctp_sk(sk);
/* Free up the HMAC transform. */ crypto_free_shash(sp->hmac); +}
+static void sctp_destruct_sock(struct sock *sk) +{ + sctp_destruct_common(sk); inet_sock_destruct(sk); }
@@ -8134,7 +8138,7 @@ void sctp_copy_sock(struct sock *newsk, newsk->sk_reuse = sk->sk_reuse;
newsk->sk_shutdown = sk->sk_shutdown; - newsk->sk_destruct = sctp_destruct_sock; + newsk->sk_destruct = sk->sk_destruct; newsk->sk_family = sk->sk_family; newsk->sk_protocol = IPPROTO_SCTP; newsk->sk_backlog_rcv = sk->sk_prot->backlog_rcv; @@ -8351,11 +8355,20 @@ struct proto sctp_prot = {
#if IS_ENABLED(CONFIG_IPV6)
-#include <net/transp_v6.h> -static void sctp_v6_destroy_sock(struct sock *sk) +static void sctp_v6_destruct_sock(struct sock *sk) +{ + sctp_destruct_common(sk); + inet6_sock_destruct(sk); +} + +static int sctp_v6_init_sock(struct sock *sk) { - sctp_destroy_sock(sk); - inet6_destroy_sock(sk); + int ret = sctp_init_sock(sk); + + if (!ret) + sk->sk_destruct = sctp_v6_destruct_sock; + + return ret; }
struct proto sctpv6_prot = { @@ -8365,8 +8378,8 @@ struct proto sctpv6_prot = { .disconnect = sctp_disconnect, .accept = sctp_accept, .ioctl = sctp_ioctl, - .init = sctp_init_sock, - .destroy = sctp_v6_destroy_sock, + .init = sctp_v6_init_sock, + .destroy = sctp_destroy_sock, .shutdown = sctp_shutdown, .setsockopt = sctp_setsockopt, .getsockopt = sctp_getsockopt,