udf: Don't BUG on missing metadata partition descriptor
Currently, if a metadata partition map is missing its partition descriptor, then udf_get_pblock_meta25() will BUG() out the first time it is called. This is rather drastic for a corrupted filesystem, so just treat this case as an invalid mapping instead. Signed-off-by: Alden Tondettar <alden.tondettar@gmail.com> Signed-off-by: Jan Kara <jack@suse.cz>
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@ -317,8 +317,9 @@ uint32_t udf_get_pblock_meta25(struct super_block *sb, uint32_t block,
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mdata = &map->s_type_specific.s_metadata;
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inode = mdata->s_metadata_fe ? : mdata->s_mirror_fe;
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/* We shouldn't mount such media... */
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BUG_ON(!inode);
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if (!inode)
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return 0xFFFFFFFF;
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retblk = udf_try_read_meta(inode, block, partition, offset);
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if (retblk == 0xFFFFFFFF && mdata->s_metadata_fe) {
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udf_warn(sb, "error reading from METADATA, trying to read from MIRROR\n");
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