linux-kernel - [PATCH 08/14] fs/ntfs3: Correct ntfs_check_for_free

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Date:   Fri, 28 Oct 2022 20:05:20 +0300
From:   Konstantin Komarov <almaz.alexandrovich@...agon-software.com>
To:     <ntfs3@...ts.linux.dev>
CC:     <linux-kernel@...r.kernel.org>, <linux-fsdevel@...r.kernel.org>
Subject: [PATCH 08/14] fs/ntfs3: Correct ntfs_check_for_free_space

zlen in some cases was bigger than correct value.

Signed-off-by: Konstantin Komarov <almaz.alexandrovich@...agon-software.com>
---
  fs/ntfs3/fsntfs.c | 2 +-
  1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/fs/ntfs3/fsntfs.c b/fs/ntfs3/fsntfs.c
index b56ffb4951cc..e5a1f4df0397 100644
--- a/fs/ntfs3/fsntfs.c
+++ b/fs/ntfs3/fsntfs.c
@@ -432,7 +432,7 @@ bool ntfs_check_for_free_space(struct ntfs_sb_info *sbi, CLST clen, CLST mlen)
  	wnd = &sbi->used.bitmap;
  	down_read_nested(&wnd->rw_lock, BITMAP_MUTEX_CLUSTERS);
  	free = wnd_zeroes(wnd);
-	zlen = wnd_zone_len(wnd);
+	zlen = min_t(size_t, NTFS_MIN_MFT_ZONE, wnd_zone_len(wnd));
  	up_read(&wnd->rw_lock);
  
  	if (free < zlen + clen)
-- 
2.37.0