diff options
| author | Joe Thornber <ejt@redhat.com> | 2021-12-10 13:49:53 +0000 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2022-01-27 10:54:20 +0100 |
| commit | eaf8cffcf5d555f739d34cb09b7b4862e7bcb5ff (patch) | |
| tree | 97629ab9a4fe1526d41bacea11ab5d356b7a951b /drivers/md | |
| parent | 5850bef8e955a0c4ce4653f858c8e37c585269eb (diff) | |
dm space map common: add bounds check to sm_ll_lookup_bitmap()
[ Upstream commit cba23ac158db7f3cd48a923d6861bee2eb7a2978 ]
Corrupted metadata could warrant returning error from sm_ll_lookup_bitmap().
Signed-off-by: Joe Thornber <ejt@redhat.com>
Signed-off-by: Mike Snitzer <snitzer@redhat.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Diffstat (limited to 'drivers/md')
| -rw-r--r-- | drivers/md/persistent-data/dm-space-map-common.c | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/drivers/md/persistent-data/dm-space-map-common.c b/drivers/md/persistent-data/dm-space-map-common.c index a213bf11738f..85853ab62971 100644 --- a/drivers/md/persistent-data/dm-space-map-common.c +++ b/drivers/md/persistent-data/dm-space-map-common.c @@ -281,6 +281,11 @@ int sm_ll_lookup_bitmap(struct ll_disk *ll, dm_block_t b, uint32_t *result) struct disk_index_entry ie_disk; struct dm_block *blk; + if (b >= ll->nr_blocks) { + DMERR_LIMIT("metadata block out of bounds"); + return -EINVAL; + } + b = do_div(index, ll->entries_per_block); r = ll->load_ie(ll, index, &ie_disk); if (r < 0) |