From patchwork Mon Jan 22 12:38:38 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: David Howells X-Patchwork-Id: 764687 Received: from us-smtp-delivery-124.mimecast.com (us-smtp-delivery-124.mimecast.com [170.10.129.124]) (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 8C1D43D571 for ; Mon, 22 Jan 2024 12:39:09 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=170.10.129.124 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1705927151; cv=none; b=br9DAFX8ND0mKJjjKHODO5B0/C15Jwn8hznmwaoNApImJr4XBptz7ohniPtQaF1qH7L949PbE3ZEdSBwNhednl07+ZsedAGxO00jU8X282hoMU/iCH0stkm26oA5Nl1wGFrDx6DPhX3md7nA5MBAns7YEll/S163+ZyArAuJpGE= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1705927151; c=relaxed/simple; bh=Qn7dd9HK9v0F1KFFIftRsyM5xQPDc6YGUH7hJwsGprs=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=XK3F9Beecx/awG9UyH/lVox90bQUCP99GfE2CTZ00nhg4ySoP25BdFywwP+d1X+fcQ597/WASaeqqZ2A8cuHI2+O5/qNolN+xAOq7wZMcXbgAytYc4fUphjVL7tYYmPCK4HhQ9YP6VIZcHPHTj3EKovgyqF8KBPxMoHig/zSLOs= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none 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=TEvMj8HX; arc=none smtp.client-ip=170.10.129.124 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none 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="TEvMj8HX" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1705927148; 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=dTDK7i2Q4hPQnzfb2SdByLYJyeMyokMSiVdAUDeKcK0=; b=TEvMj8HXj/L8//b6jjhQO5Lbs7kyxFqCc5qECJqWXGxL10zzuuUU+3B/Ga7z9lT4CRKvks nxeOlk5zuO/oGMqv709sTMLETlJ9Hr6j1xjaQfX2riK1IGp28eHnlH5iGEzI1b6LmtBGEa m28t4p8ApP/i8JOkN8ibU49yF9Tgc9g= 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-413-_plndR-FP8mhZbkTFUOBNw-1; Mon, 22 Jan 2024 07:39:05 -0500 X-MC-Unique: _plndR-FP8mhZbkTFUOBNw-1 Received: from smtp.corp.redhat.com (int-mx07.intmail.prod.int.rdu2.redhat.com [10.11.54.7]) (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 DC08E1064DA3; Mon, 22 Jan 2024 12:39:04 +0000 (UTC) Received: from warthog.procyon.org.com (unknown [10.42.28.67]) by smtp.corp.redhat.com (Postfix) with ESMTP id 0D2471C060B1; Mon, 22 Jan 2024 12:39:02 +0000 (UTC) From: David Howells To: Christian Brauner Cc: David Howells , Jeff Layton , Matthew Wilcox , netfs@lists.linux.dev, 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-erofs@lists.ozlabs.org, linux-fsdevel@vger.kernel.org, linux-mm@kvack.org, linux-kernel@vger.kernel.org, Dan Carpenter Subject: [PATCH 05/10] netfs: Fix a NULL vs IS_ERR() check in netfs_perform_write() Date: Mon, 22 Jan 2024 12:38:38 +0000 Message-ID: <20240122123845.3822570-6-dhowells@redhat.com> In-Reply-To: <20240122123845.3822570-1-dhowells@redhat.com> References: <20240122123845.3822570-1-dhowells@redhat.com> Precedence: bulk X-Mailing-List: ceph-devel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Scanned-By: MIMEDefang 3.4.1 on 10.11.54.7 From: Dan Carpenter The netfs_grab_folio_for_write() function doesn't return NULL, it returns error pointers. Update the check accordingly. Fixes: c38f4e96e605 ("netfs: Provide func to copy data to pagecache for buffered write") Signed-off-by: Dan Carpenter Signed-off-by: David Howells Link: https://lore.kernel.org/r/29fb1310-8e2d-47ba-b68d-40354eb7b896@moroto.mountain/ --- fs/netfs/buffered_write.c | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-) diff --git a/fs/netfs/buffered_write.c b/fs/netfs/buffered_write.c index e7f9ba6fb16b..a3059b3168fd 100644 --- a/fs/netfs/buffered_write.c +++ b/fs/netfs/buffered_write.c @@ -221,10 +221,11 @@ ssize_t netfs_perform_write(struct kiocb *iocb, struct iov_iter *iter, if (unlikely(fault_in_iov_iter_readable(iter, part) == part)) break; - ret = -ENOMEM; folio = netfs_grab_folio_for_write(mapping, pos, part); - if (!folio) + if (IS_ERR(folio)) { + ret = PTR_ERR(folio); break; + } flen = folio_size(folio); offset = pos & (flen - 1);