From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1760275AbaGOWYV (ORCPT ); Tue, 15 Jul 2014 18:24:21 -0400 Received: from youngberry.canonical.com ([91.189.89.112]:53989 "EHLO youngberry.canonical.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752111AbaGOVcR (ORCPT ); Tue, 15 Jul 2014 17:32:17 -0400 From: Kamal Mostafa To: linux-kernel@vger.kernel.org, stable@vger.kernel.org, kernel-team@lists.ubuntu.com Cc: Chris Mason , Kamal Mostafa Subject: [PATCH 3.13 112/198] Btrfs: fix double free in find_lock_delalloc_range Date: Tue, 15 Jul 2014 14:29:42 -0700 Message-Id: <1405459868-15089-113-git-send-email-kamal@canonical.com> X-Mailer: git-send-email 1.9.1 In-Reply-To: <1405459868-15089-1-git-send-email-kamal@canonical.com> References: <1405459868-15089-1-git-send-email-kamal@canonical.com> X-Extended-Stable: 3.13 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org 3.13.11.5 -stable review patch. If anyone has any objections, please let me know. ------------------ From: Chris Mason commit 7d78874273463a784759916fc3e0b4e2eb141c70 upstream. We need to NULL the cached_state after freeing it, otherwise we might free it again if find_delalloc_range doesn't find anything. Signed-off-by: Chris Mason Signed-off-by: Kamal Mostafa --- fs/btrfs/extent_io.c | 1 + 1 file changed, 1 insertion(+) diff --git a/fs/btrfs/extent_io.c b/fs/btrfs/extent_io.c index ff43802..809bbe1 100644 --- a/fs/btrfs/extent_io.c +++ b/fs/btrfs/extent_io.c @@ -1644,6 +1644,7 @@ again: * shortening the size of the delalloc range we're searching */ free_extent_state(cached_state); + cached_state = NULL; if (!loops) { max_bytes = PAGE_CACHE_SIZE; loops = 1; -- 1.9.1