From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([2001:4830:134:3::10]:54892) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1Wn9NZ-0000mz-Mx for qemu-devel@nongnu.org; Wed, 21 May 2014 12:28:39 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1Wn9NT-0002CX-Fr for qemu-devel@nongnu.org; Wed, 21 May 2014 12:28:33 -0400 Received: from mx1.redhat.com ([209.132.183.28]:47864) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1Wn9NT-0002CO-8h for qemu-devel@nongnu.org; Wed, 21 May 2014 12:28:27 -0400 Received: from int-mx02.intmail.prod.int.phx2.redhat.com (int-mx02.intmail.prod.int.phx2.redhat.com [10.5.11.12]) by mx1.redhat.com (8.14.4/8.14.4) with ESMTP id s4LGSQ41012589 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=OK) for ; Wed, 21 May 2014 12:28:26 -0400 From: Kevin Wolf Date: Wed, 21 May 2014 18:28:01 +0200 Message-Id: <1400689698-3096-4-git-send-email-kwolf@redhat.com> In-Reply-To: <1400689698-3096-1-git-send-email-kwolf@redhat.com> References: <1400689698-3096-1-git-send-email-kwolf@redhat.com> Subject: [Qemu-devel] [PATCH 03/20] 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, 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 --- 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