diff options
| author | Johannes Thumshirn <johannes.thumshirn@wdc.com> | 2022-11-04 17:12:33 +0300 |
|---|---|---|
| committer | David Sterba <dsterba@suse.com> | 2022-11-07 16:35:21 +0300 |
| commit | 21e61ec6d0bb786818490e926aa9aeb4de95ad0d (patch) | |
| tree | 6c047347027e9a2199976de75c777eb656972583 /fs/btrfs/volumes.c | |
| parent | b75b51f886e9dd8cdfca1392ad43f4e542611c00 (diff) | |
| download | linux-21e61ec6d0bb786818490e926aa9aeb4de95ad0d.tar.xz | |
btrfs: zoned: clone zoned device info when cloning a device
When cloning a btrfs_device, we're not cloning the associated
btrfs_zoned_device_info structure of the device in case of a zoned
filesystem.
Later on this leads to a NULL pointer dereference when accessing the
device's zone_info for instance when setting a zone as active.
This was uncovered by fstests' testcase btrfs/161.
CC: stable@vger.kernel.org # 5.15+
Signed-off-by: Johannes Thumshirn <johannes.thumshirn@wdc.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
Diffstat (limited to 'fs/btrfs/volumes.c')
| -rw-r--r-- | fs/btrfs/volumes.c | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/fs/btrfs/volumes.c b/fs/btrfs/volumes.c index f09d09c259f5..3cb968ede675 100644 --- a/fs/btrfs/volumes.c +++ b/fs/btrfs/volumes.c @@ -1011,6 +1011,18 @@ static struct btrfs_fs_devices *clone_fs_devices(struct btrfs_fs_devices *orig) rcu_assign_pointer(device->name, name); } + if (orig_dev->zone_info) { + struct btrfs_zoned_device_info *zone_info; + + zone_info = btrfs_clone_dev_zone_info(orig_dev); + if (!zone_info) { + btrfs_free_device(device); + ret = -ENOMEM; + goto error; + } + device->zone_info = zone_info; + } + list_add(&device->dev_list, &fs_devices->devices); device->fs_devices = fs_devices; fs_devices->num_devices++; |