From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([2001:4830:134:3::10]:40922) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1WzSmj-0006ms-Ac for qemu-devel@nongnu.org; Tue, 24 Jun 2014 11:37:31 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1WzSma-0008Pr-3z for qemu-devel@nongnu.org; Tue, 24 Jun 2014 11:37:25 -0400 Received: from mx1.redhat.com ([209.132.183.28]:34779) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1WzSmZ-0008Pg-T7 for qemu-devel@nongnu.org; Tue, 24 Jun 2014 11:37:16 -0400 From: Kevin Wolf Date: Tue, 24 Jun 2014 17:36:45 +0200 Message-Id: <1403624224-2084-4-git-send-email-kwolf@redhat.com> In-Reply-To: <1403624224-2084-1-git-send-email-kwolf@redhat.com> References: <1403624224-2084-1-git-send-email-kwolf@redhat.com> Subject: [Qemu-devel] [PATCH v4 03/21] bochs: 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, benoit.canet@irqsave.net, maxa@catit.be, stefanha@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 bochs block driver. Signed-off-by: Kevin Wolf Reviewed-by: Stefan Hajnoczi Reviewed-by: Benoit Canet --- block/bochs.c | 6 +++++- 1 file changed, 5 insertions(+), 1 deletion(-) diff --git a/block/bochs.c b/block/bochs.c index eba23df..6674b27 100644 --- a/block/bochs.c +++ b/block/bochs.c @@ -131,7 +131,11 @@ static int bochs_open(BlockDriverState *bs, QDict *options, int flags, return -EFBIG; } - 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) { + error_setg(errp, "Could not allocate memory for catalog"); + return -ENOMEM; + } ret = bdrv_pread(bs->file, le32_to_cpu(bochs.header), s->catalog_bitmap, s->catalog_size * 4); -- 1.8.3.1