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btrfs: volumes: Make sure no dev extent is beyond device boundary 

Add extra dev extent end check against device boundary.

Signed-off-by: Qu Wenruo <wqu@suse.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
This commit is contained in:
Qu Wenruo 2018-10-05 17:45:55 +08:00 committed by David Sterba
parent 5eb193812a
commit 05a37c4860
1 changed files with 17 additions and 0 deletions
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17
fs/btrfs/volumes.c
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@ -7387,6 +7387,7 @@ static int verify_one_dev_extent(struct btrfs_fs_info *fs_info,
struct extent_map_tree *em_tree = &fs_info->mapping_tree.map_tree;
struct extent_map *em;
struct map_lookup *map;
struct btrfs_device *dev;
u64 stripe_len;
bool found = false;
int ret = 0;
@ -7436,6 +7437,22 @@ static int verify_one_dev_extent(struct btrfs_fs_info *fs_info,
physical_offset, devid);
ret = -EUCLEAN;
}
/* Make sure no dev extent is beyond device bondary */
dev = btrfs_find_device(fs_info, devid, NULL, NULL);
if (!dev) {
btrfs_err(fs_info, "failed to find devid %llu", devid);
ret = -EUCLEAN;
goto out;
}
if (physical_offset + physical_len > dev->disk_total_bytes) {
btrfs_err(fs_info,
"dev extent devid %llu physical offset %llu len %llu is beyond device boundary %llu",
devid, physical_offset, physical_len,
dev->disk_total_bytes);
ret = -EUCLEAN;
goto out;
}
out:
free_extent_map(em);
return ret;