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sctp: Call inet6_destroy_sock() via sk->sk_destruct(). 

commit 6431b0f6ff upstream.

After commit d38afeec26 ("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>
This commit is contained in:
Kuniyuki Iwashima 2022-10-19 15:36:01 -07:00 committed by Greg Kroah-Hartman
parent a530b33fe9
commit a09b9383b7
1 changed files with 21 additions and 8 deletions
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29
net/sctp/socket.c
View File

@ -5102,13 +5102,17 @@ static void sctp_destroy_sock(struct sock *sk)
}
/* 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);
}
@ -9431,7 +9435,7 @@ void sctp_copy_sock(struct sock *newsk, struct sock *sk,
sctp_sk(newsk)->reuse = sp->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;
@ -9666,11 +9670,20 @@ 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_destroy_sock(sk);
inet6_destroy_sock(sk);
sctp_destruct_common(sk);
inet6_sock_destruct(sk);
}
static int sctp_v6_init_sock(struct sock *sk)
{
int ret = sctp_init_sock(sk);
if (!ret)
sk->sk_destruct = sctp_v6_destruct_sock;
return ret;
}
struct proto sctpv6_prot = {
@ -9680,8 +9693,8 @@ 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,