From: David Howells Date: Wed, 24 Jun 2026 16:38:18 +0000 (+0100) Subject: rxrpc: Fix rxrpc_rotate_tx_rotate() to check there's something to rotate X-Git-Url: http://git.ipfire.org/gitweb/?a=commitdiff_plain;h=a5462da5a349fc7f17ad5ebd899380260d03e7ed;p=thirdparty%2Fkernel%2Fstable.git rxrpc: Fix rxrpc_rotate_tx_rotate() to check there's something to rotate Fix rxrpc_rotate_tx_rotate() to check that there's something in the transmission buffer to be rotated before it attempts to rotate anything. Fixes: b341a0263b1b ("rxrpc: Implement progressive transmission queue struct") Link: https://sashiko.dev/#/patchset/20260618134802.2477777-1-dhowells%40redhat.com Signed-off-by: David Howells cc: Marc Dionne cc: Jeffrey Altman cc: Simon Horman cc: linux-afs@lists.infradead.org cc: stable@kernel.org Link: https://patch.msgid.link/20260624163819.3017002-12-dhowells@redhat.com Signed-off-by: Jakub Kicinski --- diff --git a/net/rxrpc/input.c b/net/rxrpc/input.c index 9bd0f1b92463..73cafe6bfa9f 100644 --- a/net/rxrpc/input.c +++ b/net/rxrpc/input.c @@ -237,6 +237,9 @@ static bool rxrpc_rotate_tx_window(struct rxrpc_call *call, rxrpc_seq_t to, call->acks_lowest_nak = to; } + if (after(seq, to)) + return false; + /* We may have a left over fully-consumed buffer at the front that we * couldn't drop before (rotate_and_keep below). */