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udf: Disallow R/W mode for disk with Metadata partition

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Currently we do not support writing to UDF disks with Metadata partition.
There is already check that disks with declared minimal write revision to
UDF 2.50 or higher are mounted only in R/O mode but this does not cover
situation when minimal write revision is set incorrectly (e.g. to 2.01).

Link: https://lore.kernel.org/r/20200112144959.28104-1-pali.rohar@gmail.com
Signed-off-by: Pali Rohár <pali.rohar@gmail.com>
Signed-off-by: Jan Kara <jack@suse.cz>
This commit is contained in:
Pali Rohár 2020-01-12 15:49:59 +01:00 committed by Jan Kara
parent 49be68c493
commit 57debb8154
1 changed files with 2 additions and 1 deletions
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3
fs/udf/super.c
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@ -1063,7 +1063,8 @@ static int check_partition_desc(struct super_block *sb,
goto force_ro;
if (map->s_partition_type == UDF_VIRTUAL_MAP15 ||
map->s_partition_type == UDF_VIRTUAL_MAP20)
map->s_partition_type == UDF_VIRTUAL_MAP20 ||
map->s_partition_type == UDF_METADATA_MAP25)
goto force_ro;
return 0;