diff options
| -rw-r--r-- | block/vmdk.c | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/block/vmdk.c b/block/vmdk.c index 5f43226b35..b703395504 100644 --- a/block/vmdk.c +++ b/block/vmdk.c @@ -557,6 +557,14 @@ static char *vmdk_read_desc(BlockDriverState *file, uint64_t desc_offset, return NULL; } + if (size < 4) { + /* Both descriptor file and sparse image must be much larger than 4 + * bytes, also callers of vmdk_read_desc want to compare the first 4 + * bytes with VMDK4_MAGIC, let's error out if less is read. */ + error_setg(errp, "File is too small, not a valid image"); + return NULL; + } + size = MIN(size, (1 << 20) - 1); /* avoid unbounded allocation */ buf = g_malloc(size + 1); |