From de7269d293bc3a7fba98a0f12781eccb4ea4be1e Mon Sep 17 00:00:00 2001 From: Alberto Garcia Date: Fri, 9 Feb 2018 16:42:22 +0200 Subject: [PATCH] qcow2: Use g_try_realloc() in qcow2_expand_zero_clusters() g_realloc() aborts the program if it fails to allocate the required amount of memory. We want to detect that scenario and return an error instead, so let's use g_try_realloc(). Signed-off-by: Alberto Garcia Signed-off-by: Kevin Wolf --- block/qcow2-cluster.c | 10 +++++++++- 1 file changed, 9 insertions(+), 1 deletion(-) diff --git a/block/qcow2-cluster.c b/block/qcow2-cluster.c index 3a979bcd82..f077cd3ac5 100644 --- a/block/qcow2-cluster.c +++ b/block/qcow2-cluster.c @@ -2070,7 +2070,15 @@ int qcow2_expand_zero_clusters(BlockDriverState *bs, int l1_sectors = DIV_ROUND_UP(s->snapshots[i].l1_size * sizeof(uint64_t), BDRV_SECTOR_SIZE); - l1_table = g_realloc(l1_table, l1_sectors * BDRV_SECTOR_SIZE); + uint64_t *new_l1_table = + g_try_realloc(l1_table, l1_sectors * BDRV_SECTOR_SIZE); + + if (!new_l1_table) { + ret = -ENOMEM; + goto fail; + } + + l1_table = new_l1_table; ret = bdrv_read(bs->file, s->snapshots[i].l1_table_offset / BDRV_SECTOR_SIZE,