From mboxrd@z Thu Jan 1 00:00:00 1970 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 4EE943D75A8 for ; Mon, 27 Apr 2026 15:47:59 +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=1777304880; cv=none; b=KiDqWjVWam5WHIIGv1zjl+bNl2vJjD7WK3sQBthkmMErdjeyq2w+XgbkZUsiTZvyb398tzcGnP1IpLVyN86eUpKiMCtZE50bJYETRPeqlLSScQO6kMvYSd3ouEHtjLOfEJ8EIXc6/hasn8tw9iVOORW47ys2dge+Ng6ck6TP5QE= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1777304880; c=relaxed/simple; bh=5QREYDZ853cnryQHJ1yTlusLm/biu/XfvMWK4YdBhBs=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version:content-type; b=Oqmjrv1fPtgfOgDg5iqQtqvWQCJiFS1vb1Oae5F2FPwR1tWDSNCmZDZV+GF8aCR4S2tVAyDfx1LNKH9RYqJsdFT4/kyHcJ0ahFdclVSjyzsV5i8wFZEzogEL2WkP7ZBryFFsuSGK7veCBIbQf+K1xLplk9iwiyC0foxRgMyGL8U= 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=M5VGV+OJ; arc=none smtp.client-ip=170.10.129.124 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="M5VGV+OJ" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1777304878; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=HZzlSw2rTGIAd1QOD9s2kRLtq32SYiSJ31hk3o8bXSQ=; b=M5VGV+OJPJ0ahE0jBMLMqqQiM10W/zXT2C8Zd2xtPJjkXQlQwo1q6Kp7ku+y1v79xSOGAn 38CvACYWl3Q/RW6hGyTZyG3K4LEmi3ELNRGsV6mpEfUOyX49WMmt9cIlhOdczANPtOkdTm O809OdmLtwcpikJFotbXaaT2AQY8QzY= Received: from mx-prod-mc-05.mail-002.prod.us-west-2.aws.redhat.com (ec2-54-186-198-63.us-west-2.compute.amazonaws.com [54.186.198.63]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.3, cipher=TLS_AES_256_GCM_SHA384) id us-mta-311-ca3hdlebOF6rWEa76BVDRA-1; Mon, 27 Apr 2026 11:47:56 -0400 X-MC-Unique: ca3hdlebOF6rWEa76BVDRA-1 X-Mimecast-MFC-AGG-ID: ca3hdlebOF6rWEa76BVDRA_1777304875 Received: from mx-prod-int-01.mail-002.prod.us-west-2.aws.redhat.com (mx-prod-int-01.mail-002.prod.us-west-2.aws.redhat.com [10.30.177.4]) (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 mx-prod-mc-05.mail-002.prod.us-west-2.aws.redhat.com (Postfix) with ESMTPS id 4EFF119560B0; Mon, 27 Apr 2026 15:47:55 +0000 (UTC) Received: from warthog.procyon.org.com (unknown [10.44.32.126]) by mx-prod-int-01.mail-002.prod.us-west-2.aws.redhat.com (Postfix) with ESMTP id 53946300070A; Mon, 27 Apr 2026 15:47:52 +0000 (UTC) From: David Howells To: Christian Brauner Cc: David Howells , Paulo Alcantara , netfs@lists.linux.dev, linux-afs@lists.infradead.org, linux-cifs@vger.kernel.org, ceph-devel@vger.kernel.org, linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org, Matthew Wilcox Subject: [PATCH v4 15/22] netfs: Fix leak of request in netfs_write_begin() error handling Date: Mon, 27 Apr 2026 16:46:30 +0100 Message-ID: <20260427154639.180684-16-dhowells@redhat.com> In-Reply-To: <20260427154639.180684-1-dhowells@redhat.com> References: <20260427154639.180684-1-dhowells@redhat.com> Precedence: bulk X-Mailing-List: netfs@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Scanned-By: MIMEDefang 3.4.1 on 10.30.177.4 X-Mimecast-MFC-PROC-ID: ChXwmL3V9dyG-mR3eXzsK5-Cg_I4VZQ6H-eO_m5aMR4_1777304875 X-Mimecast-Originator: redhat.com Content-Transfer-Encoding: 8bit content-type: text/plain; charset="US-ASCII"; x-default=true Fix netfs_write_begin() to not leak our ref on the request in the event that we get an error from netfs_wait_for_read(). Fixes: 4090b31422a6 ("netfs: Add a function to consolidate beginning a read") Closes: https://sashiko.dev/#/patchset/20260414082004.3756080-1-dhowells%40redhat.com Signed-off-by: David Howells cc: Paulo Alcantara cc: Matthew Wilcox cc: netfs@lists.linux.dev cc: linux-fsdevel@vger.kernel.org --- fs/netfs/buffered_read.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/fs/netfs/buffered_read.c b/fs/netfs/buffered_read.c index a406b5ac120a..71ab81b3f609 100644 --- a/fs/netfs/buffered_read.c +++ b/fs/netfs/buffered_read.c @@ -692,9 +692,9 @@ int netfs_write_begin(struct netfs_inode *ctx, netfs_read_to_pagecache(rreq, NULL); ret = netfs_wait_for_read(rreq); + netfs_put_request(rreq, netfs_rreq_trace_put_return); if (ret < 0) goto error; - netfs_put_request(rreq, netfs_rreq_trace_put_return); have_folio: ret = folio_wait_private_2_killable(folio);