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sctp: sctp_sock_migrate() returns error if sctp_bind_addr_dup() fails

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It should fail to create the new sk if sctp_bind_addr_dup() fails
when accepting or peeloff an association.

Signed-off-by: Xin Long <lucien.xin@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Xin Long 2019-03-03 17:54:53 +08:00 committed by David S. Miller
parent ad6c9986bc
commit 89664c6236
1 changed files with 24 additions and 10 deletions
repo.diff.show_diff_stats Download patch file Download diff file Expand all files Collapse all files

34
net/sctp/socket.c
View file

@ -102,9 +102,9 @@ static int sctp_send_asconf(struct sctp_association *asoc,
struct sctp_chunk *chunk); struct sctp_chunk *chunk);
static int sctp_do_bind(struct sock *, union sctp_addr *, int); static int sctp_do_bind(struct sock *, union sctp_addr *, int);
static int sctp_autobind(struct sock *sk); static int sctp_autobind(struct sock *sk);
static void sctp_sock_migrate(struct sock *oldsk, struct sock *newsk, static int sctp_sock_migrate(struct sock *oldsk, struct sock *newsk,
struct sctp_association *assoc, struct sctp_association *assoc,
enum sctp_socket_type type); enum sctp_socket_type type);
static unsigned long sctp_memory_pressure; static unsigned long sctp_memory_pressure;
static atomic_long_t sctp_memory_allocated; static atomic_long_t sctp_memory_allocated;
@ -4891,7 +4891,11 @@ static struct sock *sctp_accept(struct sock *sk, int flags, int *err, bool kern)
/* Populate the fields of the newsk from the oldsk and migrate the /* Populate the fields of the newsk from the oldsk and migrate the
* asoc to the newsk. * asoc to the newsk.
*/ */
sctp_sock_migrate(sk, newsk, asoc, SCTP_SOCKET_TCP); error = sctp_sock_migrate(sk, newsk, asoc, SCTP_SOCKET_TCP);
if (error) {
sk_common_release(newsk);
newsk = NULL;
}
out: out:
release_sock(sk); release_sock(sk);
@ -5639,7 +5643,12 @@ int sctp_do_peeloff(struct sock *sk, sctp_assoc_t id, struct socket **sockp)
/* Populate the fields of the newsk from the oldsk and migrate the /* Populate the fields of the newsk from the oldsk and migrate the
* asoc to the newsk. * asoc to the newsk.
*/ */
sctp_sock_migrate(sk, sock->sk, asoc, SCTP_SOCKET_UDP_HIGH_BANDWIDTH); err = sctp_sock_migrate(sk, sock->sk, asoc,
SCTP_SOCKET_UDP_HIGH_BANDWIDTH);
if (err) {
sock_release(sock);
sock = NULL;
}
*sockp = sock; *sockp = sock;
@ -9171,9 +9180,9 @@ static inline void sctp_copy_descendant(struct sock *sk_to,
/* Populate the fields of the newsk from the oldsk and migrate the assoc /* Populate the fields of the newsk from the oldsk and migrate the assoc
* and its messages to the newsk. * and its messages to the newsk.
*/ */
static void sctp_sock_migrate(struct sock *oldsk, struct sock *newsk, static int sctp_sock_migrate(struct sock *oldsk, struct sock *newsk,
struct sctp_association *assoc, struct sctp_association *assoc,
enum sctp_socket_type type) enum sctp_socket_type type)
{ {
struct sctp_sock *oldsp = sctp_sk(oldsk); struct sctp_sock *oldsp = sctp_sk(oldsk);
struct sctp_sock *newsp = sctp_sk(newsk); struct sctp_sock *newsp = sctp_sk(newsk);
@ -9182,6 +9191,7 @@ static void sctp_sock_migrate(struct sock *oldsk, struct sock *newsk,
struct sk_buff *skb, *tmp; struct sk_buff *skb, *tmp;
struct sctp_ulpevent *event; struct sctp_ulpevent *event;
struct sctp_bind_hashbucket *head; struct sctp_bind_hashbucket *head;
int err;
/* Migrate socket buffer sizes and all the socket level options to the /* Migrate socket buffer sizes and all the socket level options to the
* new socket. * new socket.
@ -9210,8 +9220,10 @@ static void sctp_sock_migrate(struct sock *oldsk, struct sock *newsk,
/* Copy the bind_addr list from the original endpoint to the new /* Copy the bind_addr list from the original endpoint to the new
* endpoint so that we can handle restarts properly * endpoint so that we can handle restarts properly
*/ */
sctp_bind_addr_dup(&newsp->ep->base.bind_addr, err = sctp_bind_addr_dup(&newsp->ep->base.bind_addr,
&oldsp->ep->base.bind_addr, GFP_KERNEL); &oldsp->ep->base.bind_addr, GFP_KERNEL);
if (err)
return err;
/* Move any messages in the old socket's receive queue that are for the /* Move any messages in the old socket's receive queue that are for the
* peeled off association to the new socket's receive queue. * peeled off association to the new socket's receive queue.
@ -9296,6 +9308,8 @@ static void sctp_sock_migrate(struct sock *oldsk, struct sock *newsk,
} }
release_sock(newsk); release_sock(newsk);
return 0;
} }