From bfbe5b31caa74ab97f1784fe9ade5f45e0d3de91 Mon Sep 17 00:00:00 2001 From: Konstantin Komarov Date: Fri, 30 Jun 2023 16:22:53 +0400 Subject: [PATCH] fs/ntfs3: fix deadlock in mark_as_free_ex Reported-by: syzbot+e94d98936a0ed08bde43@syzkaller.appspotmail.com Signed-off-by: Konstantin Komarov --- fs/ntfs3/fsntfs.c | 6 +++++- 1 file changed, 5 insertions(+), 1 deletion(-) diff --git a/fs/ntfs3/fsntfs.c b/fs/ntfs3/fsntfs.c index edb51dc12f65..fbfe21dbb425 100644 --- a/fs/ntfs3/fsntfs.c +++ b/fs/ntfs3/fsntfs.c @@ -2454,10 +2454,12 @@ void mark_as_free_ex(struct ntfs_sb_info *sbi, CLST lcn, CLST len, bool trim) { CLST end, i, zone_len, zlen; struct wnd_bitmap *wnd = &sbi->used.bitmap; + bool dirty = false; down_write_nested(&wnd->rw_lock, BITMAP_MUTEX_CLUSTERS); if (!wnd_is_used(wnd, lcn, len)) { - ntfs_set_state(sbi, NTFS_DIRTY_ERROR); + /* mark volume as dirty out of wnd->rw_lock */ + dirty = true; end = lcn + len; len = 0; @@ -2511,6 +2513,8 @@ void mark_as_free_ex(struct ntfs_sb_info *sbi, CLST lcn, CLST len, bool trim) out: up_write(&wnd->rw_lock); + if (dirty) + ntfs_set_state(sbi, NTFS_DIRTY_ERROR); } /*