From 4aecf1c211aa0113f28ed165d8be13096508daec Mon Sep 17 00:00:00 2001 From: Johannes Thumshirn Date: Mon, 17 Mar 2025 12:24:58 +0100 Subject: [PATCH] btrfs: zoned: fix zone activation with missing devices commit 2bbc4a45e5eb6b868357c1045bf6f38f6ba576e0 upstream. If btrfs_zone_activate() 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 activation for it. Fixes: f9a912a3c45f ("btrfs: zoned: make zone activation multi stripe capable") CC: stable@vger.kernel.org # 6.1+ Reviewed-by: Naohiro Aota Reviewed-by: Anand Jain Signed-off-by: Johannes Thumshirn Reviewed-by: David Sterba Signed-off-by: David Sterba Signed-off-by: Greg Kroah-Hartman --- fs/btrfs/zoned.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/fs/btrfs/zoned.c b/fs/btrfs/zoned.c index 794526ab90d26..46aadef5a463c 100644 --- a/fs/btrfs/zoned.c +++ b/fs/btrfs/zoned.c @@ -1909,6 +1909,9 @@ bool btrfs_zone_activate(struct btrfs_block_group *block_group) device = map->stripes[i].dev; physical = map->stripes[i].physical; + if (!device->bdev) + continue; + if (device->zone_info->max_active_zones == 0) continue; -- 2.47.3