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authorTrond Myklebust <trond.myklebust@hammerspace.com>2022-04-03 22:58:11 +0300
committerTrond Myklebust <trond.myklebust@hammerspace.com>2022-04-07 23:19:47 +0300
commitf00432063db1a0db484e85193eccc6845435b80e (patch)
treea0e0a9341d7355b4b840521190b24f08e4d15ecd /net/sunrpc/xprt.c
parent830f1111d90e8770fcfad8bd5628e8ae6fecec06 (diff)
downloadlinux-f00432063db1a0db484e85193eccc6845435b80e.tar.xz
SUNRPC: Ensure we flush any closed sockets before xs_xprt_free()
We must ensure that all sockets are closed before we call xprt_free() and release the reference to the net namespace. The problem is that calling fput() will defer closing the socket until delayed_fput() gets called. Let's fix the situation by allowing rpciod and the transport teardown code (which runs on the system wq) to call __fput_sync(), and directly close the socket. Reported-by: Felix Fu <foyjog@gmail.com> Acked-by: Al Viro <viro@zeniv.linux.org.uk> Fixes: a73881c96d73 ("SUNRPC: Fix an Oops in udp_poll()") Cc: stable@vger.kernel.org # 5.1.x: 3be232f11a3c: SUNRPC: Prevent immediate close+reconnect Cc: stable@vger.kernel.org # 5.1.x: 89f42494f92f: SUNRPC: Don't call connect() more than once on a TCP socket Cc: stable@vger.kernel.org # 5.1.x Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>
Diffstat (limited to 'net/sunrpc/xprt.c')
-rw-r--r--net/sunrpc/xprt.c7
1 files changed, 1 insertions, 6 deletions
diff --git a/net/sunrpc/xprt.c b/net/sunrpc/xprt.c
index 73344ffb2692..ad62eba540a4 100644
--- a/net/sunrpc/xprt.c
+++ b/net/sunrpc/xprt.c
@@ -930,12 +930,7 @@ void xprt_connect(struct rpc_task *task)
if (!xprt_lock_write(xprt, task))
return;
- if (test_and_clear_bit(XPRT_CLOSE_WAIT, &xprt->state)) {
- trace_xprt_disconnect_cleanup(xprt);
- xprt->ops->close(xprt);
- }
-
- if (!xprt_connected(xprt)) {
+ if (!xprt_connected(xprt) && !test_bit(XPRT_CLOSE_WAIT, &xprt->state)) {
task->tk_rqstp->rq_connect_cookie = xprt->connect_cookie;
rpc_sleep_on_timeout(&xprt->pending, task, NULL,
xprt_request_timeout(task->tk_rqstp));