From 585d70006f6e30f42e96d56c6c0933671c516c7b Mon Sep 17 00:00:00 2001 From: Alden Tondettar Date: Wed, 18 May 2016 14:09:17 -0700 Subject: [PATCH] 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 Signed-off-by: Jan Kara --- fs/udf/partition.c | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-) diff --git a/fs/udf/partition.c b/fs/udf/partition.c index 5f861ed287c3..e4e9e70c37f2 100644 --- a/fs/udf/partition.c +++ b/fs/udf/partition.c @@ -317,8 +317,9 @@ uint32_t udf_get_pblock_meta25(struct super_block *sb, uint32_t block, mdata = &map->s_type_specific.s_metadata; inode = mdata->s_metadata_fe ? : mdata->s_mirror_fe; - /* We shouldn't mount such media... */ - BUG_ON(!inode); + if (!inode) + return 0xFFFFFFFF; + retblk = udf_try_read_meta(inode, block, partition, offset); if (retblk == 0xFFFFFFFF && mdata->s_metadata_fe) { udf_warn(sb, "error reading from METADATA, trying to read from MIRROR\n");