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Commit 29cc83f6 authored by Liu Bo's avatar Liu Bo Committed by Chris Mason
Browse files

Btrfs: fix NULL pointer crash of deleting a seed device 



Same as normal devices, seed devices should be initialized with
fs_info->dev_root as well, otherwise we'll get a NULL pointer crash.

Cc: Chris Murphy <lists@colorremedies.com>
Reported-by: default avatarChris Murphy <lists@colorremedies.com>
Signed-off-by: default avatarLiu Bo <bo.li.liu@oracle.com>
Signed-off-by: default avatarChris Mason <clm@fb.com>
parent f017f15f

fs/btrfs/volumes.c

+8 −4
Original line number Diff line number Diff line
@@ -6146,10 +6146,14 @@ void btrfs_init_devices_late(struct btrfs_fs_info *fs_info) 
	struct btrfs_fs_devices *fs_devices = fs_info->fs_devices;

	struct btrfs_device *device;



	while (fs_devices) {

		mutex_lock(&fs_devices->device_list_mutex);

		list_for_each_entry(device, &fs_devices->devices, dev_list)

			device->dev_root = fs_info->dev_root;

		mutex_unlock(&fs_devices->device_list_mutex);



		fs_devices = fs_devices->seed;

	}

}



static void __btrfs_reset_dev_stats(struct btrfs_device *dev)