From: Raf Dickson <[email protected]>
[ Upstream commit 4ff2e84ff1b33d79fa0e3ae355ce4a334908ef9a ]
Replace the open-coded backlog check with sk_acceptq_is_full().
The helper uses > instead of >=, which is the correct comparison
per commit 64a146513f8f ("[NET]: Revert incorrect accept queue
backlog changes."), and adds READ_ONCE() for proper memory ordering.
Suggested-by: Stefano Garzarella <[email protected]>
Signed-off-by: Raf Dickson <[email protected]>
Reviewed-by: Stefano Garzarella <[email protected]>
Reviewed-by: Luigi Leonardi <[email protected]>
Link: https://patch.msgid.link/[email protected]
Signed-off-by: Jakub Kicinski <[email protected]>
Signed-off-by: Sasha Levin <[email protected]>
---
LLM Generated explanations, may be completely bogus:
The background searches finished and match what the earlier analysis
already showed:
- **Commit hash search** (`git log --grep="use sk_acceptq_is_full"`): no
matches. That patch is not in this v6.18.44 tree yet; the buggy `>=`
checks are still in `hyperv_transport.c` and `vmci_transport.c`.
- **Author search** (Raf Dickson): only one vsock commit here —
`ba9ad6015937a` (`vsock/vmci: fix sk_ack_backlog leak on failed
handshake`). Nothing for the `sk_acceptq_is_full()` change.
That supports the **YES** backport verdict: the bug is present locally,
the fix is not, and it should apply cleanly as a 2-line change.
net/vmw_vsock/hyperv_transport.c | 2 +-
net/vmw_vsock/vmci_transport.c | 2 +-
2 files changed, 2 insertions(+), 2 deletions(-)
diff --git a/net/vmw_vsock/hyperv_transport.c b/net/vmw_vsock/hyperv_transport.c
index 4da752b47b116..54c7f51f9145d 100644
--- a/net/vmw_vsock/hyperv_transport.c
+++ b/net/vmw_vsock/hyperv_transport.c
@@ -323,7 +323,7 @@ static void hvs_open_connection(struct vmbus_channel *chan)
goto out;
if (conn_from_host) {
- if (sk->sk_ack_backlog >= sk->sk_max_ack_backlog)
+ if (sk_acceptq_is_full(sk))
goto out;
new = vsock_create_connected(sk);
diff --git a/net/vmw_vsock/vmci_transport.c b/net/vmw_vsock/vmci_transport.c
index 75bf643ff6faf..4f02a6f269cdb 100644
--- a/net/vmw_vsock/vmci_transport.c
+++ b/net/vmw_vsock/vmci_transport.c
@@ -1002,7 +1002,7 @@ static int vmci_transport_recv_listen(struct sock *sk,
* reset. Otherwise we create and initialize a child socket and reply
* with a connection negotiation.
*/
- if (sk->sk_ack_backlog >= sk->sk_max_ack_backlog) {
+ if (sk_acceptq_is_full(sk)) {
vmci_transport_reply_reset(pkt);
return -ECONNREFUSED;
}
--
2.53.0
