From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id C4A13233722; Mon, 13 Apr 2026 16:31:33 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1776097893; cv=none; b=RyZDWHXoOgecLTdYjDYJ4L2GxgjkYFwol59f2xrw88ndDoyiV0VDhljS6kJSMNtRiNwVlVoNbg549hfNE63S8sbJzt7eyEXqD5XU9KERpRVuOsryry1B9BI8XONbBOeF7JJYeLjah6uqN7GHDZcwdA4tqWIsBNINvLGYf/w8bFw= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1776097893; c=relaxed/simple; bh=B5B6UE3iQ0pFLUIA1uHfqWjp1qxDNDrtU2MDd3MISKM=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=fopLeJy8twHJi9TVzZKUGTGW0h/Wc/SlPPWRsR3UWCctB0lkeF2l4pk91R0Pq8I9QqvRmsRbjoq5vr5JL4TGzW89LYzv4PEwnxO9jQEnWtB+McerFE6rCdRyK4qAFSPxhOGgRtDOBjB3GJIrIub78Ms38iKs8axriYqiCt5Hh7M= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=tC6kFzdh; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b="tC6kFzdh" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 5AB49C2BCB3; Mon, 13 Apr 2026 16:31:33 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1776097893; bh=B5B6UE3iQ0pFLUIA1uHfqWjp1qxDNDrtU2MDd3MISKM=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=tC6kFzdhnv9PSihtrAO37bm6CDDpJsweJwHzGzbVvhRJFI1CimbagyWfEPsXTgcVx EthVjwaN5P2GJWc+UdTc1xmOFh+8zwHDgeYkTyi17C99ul8zZYuVDGVp08b8OC/cc5 tmARiFiiU6E3v0G8Cg7BpOVLrmxkJm5Up60Joy/0= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Sabrina Dubroca , Simon Horman , Steffen Klassert , Sasha Levin Subject: [PATCH 5.15 314/570] esp: fix skb leak with espintcp and async crypto Date: Mon, 13 Apr 2026 17:57:25 +0200 Message-ID: <20260413155842.258457440@linuxfoundation.org> X-Mailer: git-send-email 2.53.0 In-Reply-To: <20260413155830.386096114@linuxfoundation.org> References: <20260413155830.386096114@linuxfoundation.org> User-Agent: quilt/0.69 X-stable: review X-Patchwork-Hint: ignore Precedence: bulk X-Mailing-List: patches@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit 5.15-stable review patch. If anyone has any objections, please let me know. ------------------ From: Sabrina Dubroca [ Upstream commit 0c0eef8ccd2413b0a10eb6bbd3442333b1e64dd2 ] When the TX queue for espintcp is full, esp_output_tail_tcp will return an error and not free the skb, because with synchronous crypto, the common xfrm output code will drop the packet for us. With async crypto (esp_output_done), we need to drop the skb when esp_output_tail_tcp returns an error. Fixes: e27cca96cd68 ("xfrm: add espintcp (RFC 8229)") Signed-off-by: Sabrina Dubroca Reviewed-by: Simon Horman Signed-off-by: Steffen Klassert Signed-off-by: Sasha Levin --- net/ipv4/esp4.c | 9 ++++++--- net/ipv6/esp6.c | 9 ++++++--- 2 files changed, 12 insertions(+), 6 deletions(-) diff --git a/net/ipv4/esp4.c b/net/ipv4/esp4.c index 272b64fd09eed..c69cee3feff00 100644 --- a/net/ipv4/esp4.c +++ b/net/ipv4/esp4.c @@ -275,10 +275,13 @@ static void esp_output_done(struct crypto_async_request *base, int err) xfrm_dev_resume(skb); } else { if (!err && - x->encap && x->encap->encap_type == TCP_ENCAP_ESPINTCP) - esp_output_tail_tcp(x, skb); - else + x->encap && x->encap->encap_type == TCP_ENCAP_ESPINTCP) { + err = esp_output_tail_tcp(x, skb); + if (err != -EINPROGRESS) + kfree_skb(skb); + } else { xfrm_output_resume(skb_to_full_sk(skb), skb, err); + } } } diff --git a/net/ipv6/esp6.c b/net/ipv6/esp6.c index 57e48dd905a48..e87f3f8f06818 100644 --- a/net/ipv6/esp6.c +++ b/net/ipv6/esp6.c @@ -312,10 +312,13 @@ static void esp_output_done(struct crypto_async_request *base, int err) xfrm_dev_resume(skb); } else { if (!err && - x->encap && x->encap->encap_type == TCP_ENCAP_ESPINTCP) - esp_output_tail_tcp(x, skb); - else + x->encap && x->encap->encap_type == TCP_ENCAP_ESPINTCP) { + err = esp_output_tail_tcp(x, skb); + if (err != -EINPROGRESS) + kfree_skb(skb); + } else { xfrm_output_resume(skb_to_full_sk(skb), skb, err); + } } } -- 2.51.0