diff options
| -rw-r--r-- | block/parallels.c | 8 |
1 files changed, 6 insertions, 2 deletions
diff --git a/block/parallels.c b/block/parallels.c index 5bbdfabb7a..6794e53c0b 100644 --- a/block/parallels.c +++ b/block/parallels.c @@ -192,7 +192,7 @@ static int64_t allocate_clusters(BlockDriverState *bs, int64_t sector_num, int nb_sectors, int *pnum) { BDRVParallelsState *s = bs->opaque; - int64_t pos, space, idx, to_allocate, i; + int64_t pos, space, idx, to_allocate, i, len; pos = block_status(s, sector_num, nb_sectors, pnum); if (pos > 0) { @@ -214,7 +214,11 @@ static int64_t allocate_clusters(BlockDriverState *bs, int64_t sector_num, assert(idx < s->bat_size && idx + to_allocate <= s->bat_size); space = to_allocate * s->tracks; - if (s->data_end + space > bdrv_getlength(bs->file->bs) >> BDRV_SECTOR_BITS) { + len = bdrv_getlength(bs->file->bs); + if (len < 0) { + return len; + } + if (s->data_end + space > (len >> BDRV_SECTOR_BITS)) { int ret; space += s->prealloc_size; if (s->prealloc_mode == PRL_PREALLOC_MODE_FALLOCATE) { |