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fs/ntfs3: fix deadlock in mark_as_free_ex

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Reported-by: syzbot+e94d98936a0ed08bde43@syzkaller.appspotmail.com
Signed-off-by: Konstantin Komarov <almaz.alexandrovich@paragon-software.com>
This commit is contained in:
Konstantin Komarov 2023-06-30 16:22:53 +04:00
parent 013ff63b64
commit bfbe5b31ca
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GPG Key ID: A9B0331F832407B6
1 changed files with 5 additions and 1 deletions
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6
fs/ntfs3/fsntfs.c
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@ -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);
}
/*