From 1ea1cd11c72d1405a6b98440a9d5ea82dfa07166 Mon Sep 17 00:00:00 2001 From: Jan Kara Date: Wed, 25 Jan 2023 11:43:03 +0100 Subject: 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 --- fs/udf/directory.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'fs/udf') 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<dir->i_blkbits)) return 0; iter->loffset = 0; -- cgit v1.2.3