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btrfs: zoned: fix zone finishing with missing devices

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commit 35fec1089e upstream.

If do_zone_finish() is called with a filesystem that has missing devices
(e.g. a RAID file system mounted in degraded mode) it is accessing the
btrfs_device::zone_info pointer, which will not be set if the device
in question is missing.

Check if the device is present (by checking if it has a valid block device
pointer associated) and if not, skip zone finishing for it.

Fixes: 4dcbb8ab31 ("btrfs: zoned: make zone finishing multi stripe capable")
CC: stable@vger.kernel.org # 6.1+
Reviewed-by: Naohiro Aota <naohiro.aota@wdc.com>
Reviewed-by: Anand Jain <anand.jain@oracle.com>
Signed-off-by: Johannes Thumshirn <johannes.thumshirn@wdc.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Johannes Thumshirn
2025-03-17 12:24:59 +01:00
committed by Greg Kroah-Hartman
parent fa55f2a31b
commit e921fce3a2
1 changed files with 3 additions and 0 deletions
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fs/btrfs/zoned.c
+3
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@@ -2168,6 +2168,9 @@ static int do_zone_finish(struct btrfs_block_group *block_group, bool fully_writ
const u64 physical = map->stripes[i].physical;
struct btrfs_zoned_device_info *zinfo = device->zone_info;
if (!device->bdev)
continue;
if (zinfo->max_active_zones == 0)
continue;