Anand Jain aa64f6f0ce btrfs: use the correct superblock to compare fsid in btrfs_validate_super
commit d167aa76dc0683828588c25767da07fb549e4f48 upstream.

The function btrfs_validate_super() should verify the fsid in the provided
superblock argument. Because, all its callers expect it to do that.

Such as in the following stack:

   write_all_supers()
       sb = fs_info->super_for_commit;
       btrfs_validate_write_super(.., sb)
         btrfs_validate_super(.., sb, ..)

   scrub_one_super()
	btrfs_validate_super(.., sb, ..)

And
   check_dev_super()
	btrfs_validate_super(.., sb, ..)

However, it currently verifies the fs_info::super_copy::fsid instead,
which is not correct.  Fix this using the correct fsid in the superblock
argument.

CC: stable@vger.kernel.org # 5.4+
Reviewed-by: Johannes Thumshirn <johannes.thumshirn@wdc.com>
Tested-by: Guilherme G. Piccoli <gpiccoli@igalia.com>
Signed-off-by: Anand Jain <anand.jain@oracle.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>
2023-09-23 11:00:00 +02:00
..
2023-06-21 15:44:12 +02:00
2023-08-11 11:53:59 +02:00
2021-09-22 12:26:25 +02:00
2022-06-14 18:11:36 +02:00
2023-09-23 10:59:56 +02:00
2023-02-22 12:50:35 +01:00
2022-06-14 18:11:41 +02:00
2020-10-01 13:17:19 +02:00
2019-12-17 19:55:30 +01:00
2023-01-18 11:41:44 +01:00