From f7b593d93746ff1032a809542152212246e24fa7 Mon Sep 17 00:00:00 2001 From: Kevin Wolf Date: Tue, 20 May 2014 13:32:14 +0200 Subject: [PATCH] parallels: Handle failure for potentially large allocations 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 1a5bd350b3..7325678a4d 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) {