From: Tetsuo Handa penguin-kernel@I-love.SAKURA.ne.jp
[ Upstream commit a4b5cc9e10803ecba64a7d54c0f47e4564b4a980 ]
I confirmed that the problem fixed by commit 2a63866c8b51a3f7 ("tipc: fix shutdown() of connectionless socket") also applies to stream socket.
---------- #include <sys/socket.h> #include <unistd.h> #include <sys/wait.h>
int main(int argc, char *argv[]) { int fds[2] = { -1, -1 }; socketpair(PF_TIPC, SOCK_STREAM /* or SOCK_DGRAM */, 0, fds); if (fork() == 0) _exit(read(fds[0], NULL, 1)); shutdown(fds[0], SHUT_RDWR); /* This must make read() return. */ wait(NULL); /* To be woken up by _exit(). */ return 0; } ----------
Since shutdown(SHUT_RDWR) should affect all processes sharing that socket, unconditionally setting sk->sk_shutdown to SHUTDOWN_MASK will be the right behavior.
Signed-off-by: Tetsuo Handa penguin-kernel@I-love.SAKURA.ne.jp Acked-by: Ying Xue ying.xue@windriver.com Signed-off-by: David S. Miller davem@davemloft.net Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- net/tipc/socket.c | 5 +---- 1 file changed, 1 insertion(+), 4 deletions(-)
--- a/net/tipc/socket.c +++ b/net/tipc/socket.c @@ -2773,10 +2773,7 @@ static int tipc_shutdown(struct socket *
trace_tipc_sk_shutdown(sk, NULL, TIPC_DUMP_ALL, " "); __tipc_shutdown(sock, TIPC_CONN_SHUTDOWN); - if (tipc_sk_type_connectionless(sk)) - sk->sk_shutdown = SHUTDOWN_MASK; - else - sk->sk_shutdown = SEND_SHUTDOWN; + sk->sk_shutdown = SHUTDOWN_MASK;
if (sk->sk_state == TIPC_DISCONNECTING) { /* Discard any unreceived messages */