| Message ID | 5f0d31d6299aacfce2df98e338afee2c20dbdb51.1646692474.git.josef@toxicpanda.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | btrfs: add snapshot_id to btrfs_header and root_item | expand |
diff --git a/fs/btrfs/volumes.c b/fs/btrfs/volumes.c index 1be7cb2f955f..fc2d3db8e539 100644 --- a/fs/btrfs/volumes.c +++ b/fs/btrfs/volumes.c @@ -7403,6 +7403,8 @@ int btrfs_read_sys_array(struct btrfs_fs_info *fs_info) if (IS_ERR(sb)) return PTR_ERR(sb); set_extent_buffer_uptodate(sb); + memzero_extent_buffer(sb, 0, sizeof(struct btrfs_header)); + /* * The sb extent buffer is artificial and just used to read the system array. * set_extent_buffer_uptodate() call does not properly mark all it's
We use HEADER_FLAG_V2 to determine different offsets into the buffer, so we need to make sure that we clear the header of the temporary extent_buffer we allocate to read the super block in, otherwise we could have this flag set and do the wrong math for the different item helpers. Signed-off-by: Josef Bacik <josef@toxicpanda.com> --- fs/btrfs/volumes.c | 2 ++ 1 file changed, 2 insertions(+)