From nobody Tue Oct 7 01:59:01 2025 Received: from us-smtp-delivery-124.mimecast.com (us-smtp-delivery-124.mimecast.com [170.10.133.124]) (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 7D7032F49EF for ; Wed, 16 Jul 2025 11:53:46 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=170.10.133.124 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1752666828; cv=none; b=TlzOqo5Oriw6kI2CWHTEySbaoTlqMLqmTokP5Rx+ubNMDE29OgYYbLAM1raNfdqk/4Zlyq321BdJ34mkCtQDm8E/0afq4vDuUIn4s0BxZ74mnKWXnRbES1ABJ3DMM9csPRjP/qKuf5T9NwtOkZzJ2+PdlTx3jmRSmpzN/UsPDHs= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1752666828; c=relaxed/simple; bh=VqkAKQ06zuDBxT1InigwkYWey8fIft48GLNxeyinELw=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=ARnbjTkUUtBCPVMiZhKbg9asT9ri4rk5h/UhPaHPKBsSwUGyPxbq+pVJB1s13meVuukB0OqQ8l6fDRHgd1uKphrEKY8ZVO7Zl3ImXGiXnjt9TeXMMHDB7ERUPYwweWYFr5ngTSMvUMXmeg8SEHDJg2JwBheYATEMyx/aSoboyK4= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=redhat.com; spf=pass smtp.mailfrom=redhat.com; dkim=pass (1024-bit key) header.d=redhat.com header.i=@redhat.com header.b=QTf3AhTW; arc=none smtp.client-ip=170.10.133.124 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=redhat.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=redhat.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=redhat.com header.i=@redhat.com header.b="QTf3AhTW" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1752666825; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=SAficW741eLddPXCBV20kWATJLxNZFQgJW7lDxysDlw=; b=QTf3AhTWqBeDLdVjgChcyhqGC7Ofw/pHn+mKstEmitL8ZlO55/pmLj1+AZp9AVCIOzeS+G c0RMvsHdz1naK+Z70e+rs5/AXYvSpb6oDaSewA0HEs6Kq+wqMz4IC/BrFg2QHnELbYJWJA 9KUp2Xb0u9z8NjHKljzE3MJ2HxCX1oY= Received: from mx-prod-mc-06.mail-002.prod.us-west-2.aws.redhat.com (ec2-35-165-154-97.us-west-2.compute.amazonaws.com [35.165.154.97]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.3, cipher=TLS_AES_256_GCM_SHA384) id us-mta-400-9ovwdBxtMwCuI_sE_bpvEg-1; Wed, 16 Jul 2025 07:53:39 -0400 X-MC-Unique: 9ovwdBxtMwCuI_sE_bpvEg-1 X-Mimecast-MFC-AGG-ID: 9ovwdBxtMwCuI_sE_bpvEg_1752666817 Received: from mx-prod-int-08.mail-002.prod.us-west-2.aws.redhat.com (mx-prod-int-08.mail-002.prod.us-west-2.aws.redhat.com [10.30.177.111]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits) server-digest SHA256) (No client certificate requested) by mx-prod-mc-06.mail-002.prod.us-west-2.aws.redhat.com (Postfix) with ESMTPS id 7EFE81800291; Wed, 16 Jul 2025 11:53:36 +0000 (UTC) Received: from warthog.procyon.org.com (unknown [10.42.28.2]) by mx-prod-int-08.mail-002.prod.us-west-2.aws.redhat.com (Postfix) with ESMTP id 395D11800D82; Wed, 16 Jul 2025 11:53:32 +0000 (UTC) From: David Howells To: netdev@vger.kernel.org Cc: David Howells , Marc Dionne , Jakub Kicinski , "David S. Miller" , Eric Dumazet , Paolo Abeni , linux-afs@lists.infradead.org, linux-kernel@vger.kernel.org, Jeffrey Altman , "Junvyyang, Tencent Zhuque Lab" , LePremierHomme , Linus Torvalds , Simon Horman , stable@vger.kernel.org Subject: [PATCH net 4/5] rxrpc: Fix transmission of an abort in response to an abort Date: Wed, 16 Jul 2025 12:53:03 +0100 Message-ID: <20250716115307.3572606-5-dhowells@redhat.com> In-Reply-To: <20250716115307.3572606-1-dhowells@redhat.com> References: <20250716115307.3572606-1-dhowells@redhat.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-Scanned-By: MIMEDefang 3.4.1 on 10.30.177.111 Content-Type: text/plain; charset="utf-8" Under some circumstances, such as when a server socket is closing, ABORT packets will be generated in response to incoming packets. Unfortunately, this also may include generating aborts in response to incoming aborts - which may cause a cycle. It appears this may be made possible by giving the client a multicast address. Fix this such that rxrpc_reject_packet() will refuse to generate aborts in response to aborts. Fixes: 248f219cb8bc ("rxrpc: Rewrite the data and ack handling code") Signed-off-by: David Howells Reviewed-by: Jeffrey Altman cc: Marc Dionne cc: Junvyyang, Tencent Zhuque Lab cc: LePremierHomme cc: Linus Torvalds cc: Jakub Kicinski cc: Paolo Abeni cc: "David S. Miller" cc: Eric Dumazet cc: Simon Horman cc: linux-afs@lists.infradead.org cc: netdev@vger.kernel.org cc: stable@vger.kernel.org --- net/rxrpc/output.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/net/rxrpc/output.c b/net/rxrpc/output.c index ef7b3096c95e..17c33b5cf7dd 100644 --- a/net/rxrpc/output.c +++ b/net/rxrpc/output.c @@ -814,6 +814,9 @@ void rxrpc_reject_packet(struct rxrpc_local *local, str= uct sk_buff *skb) __be32 code; int ret, ioc; =20 + if (sp->hdr.type =3D=3D RXRPC_PACKET_TYPE_ABORT) + return; /* Never abort an abort. */ + rxrpc_see_skb(skb, rxrpc_skb_see_reject); =20 iov[0].iov_base =3D &whdr;