diff options
| author | Alberto Garcia <berto@igalia.com> | 2018-03-06 18:14:10 +0200 |
|---|---|---|
| committer | Kevin Wolf <kwolf@redhat.com> | 2018-03-09 15:17:47 +0100 |
| commit | a8475d7573c0598ba8f92f84534110218ee11e3d (patch) | |
| tree | 6eac36e365caf359d4cee2eb80b462b27e85e53c /block | |
| parent | c7a9d81d7061a7fb3b5b5726a6f139444e1ad5e6 (diff) | |
qcow2: Check snapshot L1 table in qcow2_snapshot_goto()
This function copies a snapshot's L1 table into the active one without
validating it first.
We now have a function to take care of this, so let's use it.
Cc: Eric Blake <eblake@redhat.com>
Signed-off-by: Alberto Garcia <berto@igalia.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Diffstat (limited to 'block')
| -rw-r--r-- | block/qcow2-snapshot.c | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/block/qcow2-snapshot.c b/block/qcow2-snapshot.c index bf94f4f434..0faf728dc4 100644 --- a/block/qcow2-snapshot.c +++ b/block/qcow2-snapshot.c @@ -465,6 +465,7 @@ int qcow2_snapshot_goto(BlockDriverState *bs, const char *snapshot_id) { BDRVQcow2State *s = bs->opaque; QCowSnapshot *sn; + Error *local_err = NULL; int i, snapshot_index; int cur_l1_bytes, sn_l1_bytes; int ret; @@ -477,6 +478,14 @@ int qcow2_snapshot_goto(BlockDriverState *bs, const char *snapshot_id) } sn = &s->snapshots[snapshot_index]; + ret = qcow2_validate_table(bs, sn->l1_table_offset, sn->l1_size, + sizeof(uint64_t), QCOW_MAX_L1_SIZE, + "Snapshot L1 table", &local_err); + if (ret < 0) { + error_report_err(local_err); + goto fail; + } + if (sn->disk_size != bs->total_sectors * BDRV_SECTOR_SIZE) { error_report("qcow2: Loading snapshots with different disk " "size is not implemented"); |