Donate to e Foundation | Murena handsets with /e/OS | Own a part of Murena! Learn more

Commit 7f1b0ea4 authored by Ursula Braun's avatar Ursula Braun Committed by David S. Miller
Browse files

af_iucv: block writing if msg limit is exceeded 



When polling on an AF_IUCV socket, writing should be blocked if the
number of pending messages exceeds a defined limit.

Signed-off-by: default avatarUrsula Braun <ursula.braun@de.ibm.com>
Signed-off-by: default avatarFrank Blaschka <frank.blaschka@de.ibm.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 7d316b94

net/iucv/af_iucv.c

+1 −1
Original line number Original line Diff line number Diff line
@@ -1490,7 +1490,7 @@ unsigned int iucv_sock_poll(struct file *file, struct socket *sock, 
	if (sk->sk_state == IUCV_DISCONN)

	if (sk->sk_state == IUCV_DISCONN)

		mask |= POLLIN;

		mask |= POLLIN;





	if (sock_writeable(sk))

	if (sock_writeable(sk) && iucv_below_msglim(sk))

		mask |= POLLOUT | POLLWRNORM | POLLWRBAND;

		mask |= POLLOUT | POLLWRNORM | POLLWRBAND;

	else

	else

		set_bit(SOCK_ASYNC_NOSPACE, &sk->sk_socket->flags);

		set_bit(SOCK_ASYNC_NOSPACE, &sk->sk_socket->flags);