This is a note to let you know that I've just added the patch titled
fs/ntfs3: fix deadlock in mark_as_free_ex
to the 5.15-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
fs-ntfs3-fix-deadlock-in-mark_as_free_ex.patch
and it can be found in the queue-5.15 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From bfbe5b31caa74ab97f1784fe9ade5f45e0d3de91 Mon Sep 17 00:00:00 2001
From: Konstantin Komarov <almaz.alexandrovich@xxxxxxxxxxxxxxxxxxxx>
Date: Fri, 30 Jun 2023 16:22:53 +0400
Subject: fs/ntfs3: fix deadlock in mark_as_free_ex
From: Konstantin Komarov <almaz.alexandrovich@xxxxxxxxxxxxxxxxxxxx>
commit bfbe5b31caa74ab97f1784fe9ade5f45e0d3de91 upstream.
Reported-by: syzbot+e94d98936a0ed08bde43@xxxxxxxxxxxxxxxxxxxxxxxxx
Signed-off-by: Konstantin Komarov <almaz.alexandrovich@xxxxxxxxxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
fs/ntfs3/fsntfs.c | 6 +++++-
1 file changed, 5 insertions(+), 1 deletion(-)
--- a/fs/ntfs3/fsntfs.c
+++ b/fs/ntfs3/fsntfs.c
@@ -2458,10 +2458,12 @@ void mark_as_free_ex(struct ntfs_sb_info
{
CLST end, i;
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;
@@ -2493,6 +2495,8 @@ void mark_as_free_ex(struct ntfs_sb_info
out:
up_write(&wnd->rw_lock);
+ if (dirty)
+ ntfs_set_state(sbi, NTFS_DIRTY_ERROR);
}
/*
Patches currently in stable-queue which might be from almaz.alexandrovich@xxxxxxxxxxxxxxxxxxxx are
queue-5.15/fs-ntfs3-fix-deadlock-in-mark_as_free_ex.patch
queue-5.15/fs-ntfs3-fix-panic-about-slab-out-of-bounds-caused-by-ntfs_list_ea.patch
queue-5.15/fs-ntfs3-fix-possible-null-pointer-dereference-in-hdr_find_e.patch
