From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from us-smtp-delivery-124.mimecast.com (us-smtp-delivery-124.mimecast.com [170.10.133.124]) (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 BF6AC47ECE1 for ; Tue, 28 Apr 2026 13:19:37 +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=1777382379; cv=none; b=tG2PI1tsx93/ijTxum64iFipBhlC/jMtWVNmmgeIgjDTN6DEOs2dVwldlqXyf3E/OCzKqCLRiQYUShfbqPZkUgXIkiR4R5CmnourFOL+GoXbb2Tvz5Mxw1lvarENQMPeHyrjqKLmBOqM/6JA3hFAfHuK61IHlNHp5S9G6V0TULI= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1777382379; c=relaxed/simple; bh=JmXP+QXfysKowXIq/+dNx74WhS6n5x7XmBRvcwsYGOE=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=iNv1pH3dp+CclRFkSH8OlKs76uP//YY6ZmBSAakzlR8ZtUzNsPyYh8U4DFAbPhT+8xk7QgapVZ9D6Tz8E2xYi0Cs3NCtx8FmQRQAkWvo38as0hcDnHQwjowk0cquOiwJVE2n847lAy8maostp3njhGL3CzKj9d4/J0bI1QxtAyo= 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=PtAElIaR; 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="PtAElIaR" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1777382376; 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=NVdup9Yb9JycCAuf4DYfAvqCMMZy27DYqgj2TZFqU1c=; b=PtAElIaR1Y7QKy/CJGDv6ZzYIyOaua9jKUg/OFvQ4IW1vA2Ge5fqMTIs1dyvBzrVyBOGhD tTdw0YGMvJ6CrSQ0GowcOgfG5p3ZHHzlcHrRqjJgKRFkANrD9VyMPXEyyFQmBhvvvlS/hI wKWv2Eqrmhu63jpfvSMTZoRBA5+s5sU= 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-652-MMscdLOhOGKsXqAJlrHUMw-1; Tue, 28 Apr 2026 09:19:31 -0400 X-MC-Unique: MMscdLOhOGKsXqAJlrHUMw-1 X-Mimecast-MFC-AGG-ID: MMscdLOhOGKsXqAJlrHUMw_1777382369 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-05.mail-002.prod.us-west-2.aws.redhat.com (Postfix) with ESMTPS id A1A041955E9C; Tue, 28 Apr 2026 13:19:29 +0000 (UTC) Received: from warthog.procyon.org.com (unknown [10.44.32.126]) by mx-prod-int-08.mail-002.prod.us-west-2.aws.redhat.com (Postfix) with ESMTP id A608B180047F; Tue, 28 Apr 2026 13:19:26 +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 v5 18/24] netfs: Fix leak of request in netfs_write_begin() error handling Date: Tue, 28 Apr 2026 14:17:48 +0100 Message-ID: <20260428131756.922303-19-dhowells@redhat.com> In-Reply-To: <20260428131756.922303-1-dhowells@redhat.com> References: <20260428131756.922303-1-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: 8bit X-Scanned-By: MIMEDefang 3.4.1 on 10.30.177.111 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 18c8e00626c9..db279124d450 100644 --- a/fs/netfs/buffered_read.c +++ b/fs/netfs/buffered_read.c @@ -687,9 +687,9 @@ 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);