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authorJan Kara <jack@suse.cz>2023-01-25 11:43:03 +0100
committerJan Kara <jack@suse.cz>2023-01-26 16:46:32 +0100
commit1ea1cd11c72d1405a6b98440a9d5ea82dfa07166 (patch)
tree649829990ea476dc16f4817b5c2b3134a9a9e0a2 /fs/udf
parentee454ad2fce7baa272fc0a69f93d47013ea06b07 (diff)
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udf: Fix directory iteration for longer tail extents
When directory's last extent has more that one block and its length is not multiple of a block side, the code wrongly decided to move to the next extent instead of processing the last partial block. This led to directory corruption. Fix the rounding issue. Signed-off-by: Jan Kara <jack@suse.cz>
Diffstat (limited to 'fs/udf')
-rw-r--r--fs/udf/directory.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/fs/udf/directory.c b/fs/udf/directory.c
index b1424e2aa868..31f1bf8ab848 100644
--- a/fs/udf/directory.c
+++ b/fs/udf/directory.c
@@ -170,7 +170,7 @@ static struct buffer_head *udf_fiiter_bread_blk(struct udf_fileident_iter *iter)
static int udf_fiiter_advance_blk(struct udf_fileident_iter *iter)
{
iter->loffset++;
- if (iter->loffset < iter->elen >> iter->dir->i_blkbits)
+ if (iter->loffset < DIV_ROUND_UP(iter->elen, 1<<iter->dir->i_blkbits))
return 0;
iter->loffset = 0;