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| author | Anand Jain <anand.jain@oracle.com> | 2023-07-31 14:16:34 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2023-09-19 13:20:28 +0300 |
| commit | e76cef3dcdb88f94274881a35103a8cee4dc4ed3 (patch) | |
| tree | 130b78b999ecba1c34fdf42dbc4045d57b435144 | |
| parent | f2873a18c235e48247284d7cb7802634613fb9c0 (diff) | |
| download | linux-e76cef3dcdb88f94274881a35103a8cee4dc4ed3.tar.xz | |
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>
| -rw-r--r-- | fs/btrfs/disk-io.c | 5 |
1 files changed, 2 insertions, 3 deletions
diff --git a/fs/btrfs/disk-io.c b/fs/btrfs/disk-io.c index 608b939a4d28..1bc6909d4de9 100644 --- a/fs/btrfs/disk-io.c +++ b/fs/btrfs/disk-io.c @@ -2496,11 +2496,10 @@ static int validate_super(struct btrfs_fs_info *fs_info, ret = -EINVAL; } - if (memcmp(fs_info->fs_devices->fsid, fs_info->super_copy->fsid, - BTRFS_FSID_SIZE)) { + if (memcmp(fs_info->fs_devices->fsid, sb->fsid, BTRFS_FSID_SIZE) != 0) { btrfs_err(fs_info, "superblock fsid doesn't match fsid of fs_devices: %pU != %pU", - fs_info->super_copy->fsid, fs_info->fs_devices->fsid); + sb->fsid, fs_info->fs_devices->fsid); ret = -EINVAL; } |