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Message-ID: <168333403089.7813.511134747683134976.stgit@oracle-102.nfsv4bat.org> Date: Fri, 05 May 2023 20:47:13 -0400 From: Chuck Lever <cel@...nel.org> To: kernel-tls-handshake@...ts.linux.dev Cc: netdev@...r.kernel.org, dan.carpenter@...aro.org Subject: [PATCH v2 5/6] net/handshake: Unpin sock->file if a handshake is cancelled From: Chuck Lever <chuck.lever@...cle.com> If user space never calls DONE, sock->file's reference count remains elevated. Enable sock->file to be freed eventually in this case. Reported-by: Jakub Kacinski <kuba@...nel.org> Fixes: 3b3009ea8abb ("net/handshake: Create a NETLINK service for handling handshake requests") Signed-off-by: Chuck Lever <chuck.lever@...cle.com> --- net/handshake/handshake.h | 1 + net/handshake/request.c | 4 ++++ 2 files changed, 5 insertions(+) diff --git a/net/handshake/handshake.h b/net/handshake/handshake.h index 4dac965c99df..8aeaadca844f 100644 --- a/net/handshake/handshake.h +++ b/net/handshake/handshake.h @@ -31,6 +31,7 @@ struct handshake_req { struct list_head hr_list; struct rhash_head hr_rhash; unsigned long hr_flags; + struct file *hr_file; const struct handshake_proto *hr_proto; struct sock *hr_sk; void (*hr_odestruct)(struct sock *sk); diff --git a/net/handshake/request.c b/net/handshake/request.c index 94d5cef3e048..d78d41abb3d9 100644 --- a/net/handshake/request.c +++ b/net/handshake/request.c @@ -239,6 +239,7 @@ int handshake_req_submit(struct socket *sock, struct handshake_req *req, } req->hr_odestruct = req->hr_sk->sk_destruct; req->hr_sk->sk_destruct = handshake_sk_destruct; + req->hr_file = sock->file; ret = -EOPNOTSUPP; net = sock_net(req->hr_sk); @@ -334,6 +335,9 @@ bool handshake_req_cancel(struct sock *sk) return false; } + /* Request accepted and waiting for DONE */ + fput(req->hr_file); + out_true: trace_handshake_cancel(net, req, sk);
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