From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([2001:4830:134:3::10]:50564) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1XFoAG-000544-RK for qemu-devel@nongnu.org; Fri, 08 Aug 2014 13:41:21 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1XFoAB-00078s-NN for qemu-devel@nongnu.org; Fri, 08 Aug 2014 13:41:16 -0400 Received: from mx1.redhat.com ([209.132.183.28]:21608) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1XFoAB-00078f-6g for qemu-devel@nongnu.org; Fri, 08 Aug 2014 13:41:11 -0400 Received: from int-mx10.intmail.prod.int.phx2.redhat.com (int-mx10.intmail.prod.int.phx2.redhat.com [10.5.11.23]) by mx1.redhat.com (8.14.4/8.14.4) with ESMTP id s78Hf9s5021021 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK) for ; Fri, 8 Aug 2014 13:41:10 -0400 From: Kevin Wolf Date: Fri, 8 Aug 2014 19:39:48 +0200 Message-Id: <1407519603-6635-48-git-send-email-kwolf@redhat.com> In-Reply-To: <1407519603-6635-1-git-send-email-kwolf@redhat.com> References: <1407519603-6635-1-git-send-email-kwolf@redhat.com> Subject: [Qemu-devel] [PULL 47/62] parallels: Handle failure for potentially large allocations List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: qemu-devel@nongnu.org Cc: kwolf@redhat.com Some code in the block layer makes potentially huge allocations. Failure is not completely unexpected there, so avoid aborting qemu and handle out-of-memory situations gracefully. This patch addresses the allocations in the parallels block driver. Signed-off-by: Kevin Wolf Reviewed-by: Stefan Hajnoczi Reviewed-by: Benoit Canet --- block/parallels.c | 6 +++++- 1 file changed, 5 insertions(+), 1 deletion(-) diff --git a/block/parallels.c b/block/parallels.c index 1a5bd35..7325678 100644 --- a/block/parallels.c +++ b/block/parallels.c @@ -105,7 +105,11 @@ static int parallels_open(BlockDriverState *bs, QDict *options, int flags, ret = -EFBIG; goto fail; } - s->catalog_bitmap = g_malloc(s->catalog_size * 4); + s->catalog_bitmap = g_try_malloc(s->catalog_size * 4); + if (s->catalog_size && s->catalog_bitmap == NULL) { + ret = -ENOMEM; + goto fail; + } ret = bdrv_pread(bs->file, 64, s->catalog_bitmap, s->catalog_size * 4); if (ret < 0) { -- 1.8.3.1