diff options
Diffstat (limited to 'tools/blktap')
| -rw-r--r-- | tools/blktap/drivers/block-qcow.c | 5 |
1 files changed, 3 insertions, 2 deletions
diff --git a/tools/blktap/drivers/block-qcow.c b/tools/blktap/drivers/block-qcow.c index dd65cd01bb..8027fcaca2 100644 --- a/tools/blktap/drivers/block-qcow.c +++ b/tools/blktap/drivers/block-qcow.c @@ -824,7 +824,7 @@ static int tdqcow_open (struct disk_driver *dd, const char *name, td_flag_t flag l1_table_block = ROUNDUP(l1_table_block, 512); ret = posix_memalign((void **)&buf2, 4096, l1_table_block); if (ret != 0) goto fail; - if (read(fd, buf2, l1_table_block) != l1_table_block) + if (read(fd, buf2, l1_table_block) < l1_table_size + s->l1_table_offset) goto fail; memcpy(s->l1_table, buf2 + s->l1_table_offset, l1_table_size); @@ -878,7 +878,8 @@ static int tdqcow_open (struct disk_driver *dd, const char *name, td_flag_t flag memcpy(buf2 + s->l1_table_offset, s->l1_table, l1_table_size); lseek(fd, 0, SEEK_SET); - if (write(fd, buf2, l1_table_block) != l1_table_block) { + if (write(fd, buf2, l1_table_block) < + l1_table_size + s->l1_table_offset) { DPRINTF("qcow: Failed to write new L1 table\n"); goto fail; } |