From nobody Wed Dec 17 01:44:30 2025 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 48D1BC4167B for ; Thu, 7 Dec 2023 21:26:18 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S235545AbjLGV0I (ORCPT ); Thu, 7 Dec 2023 16:26:08 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:43524 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S235372AbjLGVY4 (ORCPT ); Thu, 7 Dec 2023 16:24:56 -0500 Received: from us-smtp-delivery-124.mimecast.com (us-smtp-delivery-124.mimecast.com [170.10.129.124]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id A967B1FF1 for ; Thu, 7 Dec 2023 13:23:34 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1701984209; 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=i1NCs1wijkp9oudHg0v3ZW2pY0xP/Retx1SxWP1fmpE=; b=GHfSIc9SUFqyhKLfo7XtAG+IZKjNbZuLzh24e8BlrSqgYM+LkOTLmr4Q5GpGpaYpbZDssq 4i/W+llN8hIYItn9kOqv4OQvAxrH+gYp0rVkHoI3jRO3loNGr5Dg9B9nVND8nh8N1ogHae rTDd0UCiOlmrj7sKd9znT9nei5dIzm0= Received: from mimecast-mx02.redhat.com (mimecast-mx02.redhat.com [66.187.233.88]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.3, cipher=TLS_AES_256_GCM_SHA384) id us-mta-613-_pwwI_YRN4GTpksMjMzvlA-1; Thu, 07 Dec 2023 16:23:25 -0500 X-MC-Unique: _pwwI_YRN4GTpksMjMzvlA-1 Received: from smtp.corp.redhat.com (int-mx04.intmail.prod.int.rdu2.redhat.com [10.11.54.4]) (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 mimecast-mx02.redhat.com (Postfix) with ESMTPS id 6D04410B9340; Thu, 7 Dec 2023 21:23:24 +0000 (UTC) Received: from warthog.procyon.org.com (unknown [10.42.28.161]) by smtp.corp.redhat.com (Postfix) with ESMTP id C4FB72026D66; Thu, 7 Dec 2023 21:23:21 +0000 (UTC) From: David Howells To: Jeff Layton , Steve French Cc: David Howells , Matthew Wilcox , Marc Dionne , Paulo Alcantara , Shyam Prasad N , Tom Talpey , Dominique Martinet , Eric Van Hensbergen , Ilya Dryomov , Christian Brauner , linux-cachefs@redhat.com, linux-afs@lists.infradead.org, linux-cifs@vger.kernel.org, linux-nfs@vger.kernel.org, ceph-devel@vger.kernel.org, v9fs@lists.linux.dev, linux-fsdevel@vger.kernel.org, linux-mm@kvack.org, netdev@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH v3 21/59] netfs: Make netfs_put_request() handle a NULL pointer Date: Thu, 7 Dec 2023 21:21:28 +0000 Message-ID: <20231207212206.1379128-22-dhowells@redhat.com> In-Reply-To: <20231207212206.1379128-1-dhowells@redhat.com> References: <20231207212206.1379128-1-dhowells@redhat.com> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-Scanned-By: MIMEDefang 3.4.1 on 10.11.54.4 Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Type: text/plain; charset="utf-8" Make netfs_put_request() just return if given a NULL request pointer. Signed-off-by: David Howells cc: Jeff Layton cc: linux-cachefs@redhat.com cc: linux-fsdevel@vger.kernel.org cc: linux-mm@kvack.org --- fs/netfs/objects.c | 23 +++++++++++++---------- 1 file changed, 13 insertions(+), 10 deletions(-) diff --git a/fs/netfs/objects.c b/fs/netfs/objects.c index 7ef804e8915c..3ce6313cc5f9 100644 --- a/fs/netfs/objects.c +++ b/fs/netfs/objects.c @@ -109,19 +109,22 @@ static void netfs_free_request(struct work_struct *wo= rk) void netfs_put_request(struct netfs_io_request *rreq, bool was_async, enum netfs_rreq_ref_trace what) { - unsigned int debug_id =3D rreq->debug_id; + unsigned int debug_id; bool dead; int r; =20 - dead =3D __refcount_dec_and_test(&rreq->ref, &r); - trace_netfs_rreq_ref(debug_id, r - 1, what); - if (dead) { - if (was_async) { - rreq->work.func =3D netfs_free_request; - if (!queue_work(system_unbound_wq, &rreq->work)) - BUG(); - } else { - netfs_free_request(&rreq->work); + if (rreq) { + debug_id =3D rreq->debug_id; + dead =3D __refcount_dec_and_test(&rreq->ref, &r); + trace_netfs_rreq_ref(debug_id, r - 1, what); + if (dead) { + if (was_async) { + rreq->work.func =3D netfs_free_request; + if (!queue_work(system_unbound_wq, &rreq->work)) + BUG(); + } else { + netfs_free_request(&rreq->work); + } } } }