From: Konstantin Komarov <almaz.alexandrovich@paragon-software.com>
Date: Mon, 9 Sep 2024 12:39:10 +0000 (+0300)
Subject: fs/ntfs3: Additional check in ni_clear()
X-Git-Url: https://www.infradead.org/git/?a=commitdiff_plain;h=d178944db36b3369b78a08ba520de109b89bf2a9;p=users%2Fwilly%2Flinux.git

fs/ntfs3: Additional check in ni_clear()

Checking of NTFS_FLAGS_LOG_REPLAYING added to prevent access to
uninitialized bitmap during replay process.

Reported-by: syzbot+3bfd2cc059ab93efcdb4@syzkaller.appspotmail.com
Signed-off-by: Konstantin Komarov <almaz.alexandrovich@paragon-software.com>
---

diff --git a/fs/ntfs3/frecord.c b/fs/ntfs3/frecord.c
index 7d4e54161291..41c7ffad2790 100644
--- a/fs/ntfs3/frecord.c
+++ b/fs/ntfs3/frecord.c
@@ -102,7 +102,9 @@ void ni_clear(struct ntfs_inode *ni)
 {
 	struct rb_node *node;
 
-	if (!ni->vfs_inode.i_nlink && ni->mi.mrec && is_rec_inuse(ni->mi.mrec))
+	if (!ni->vfs_inode.i_nlink && ni->mi.mrec &&
+	    is_rec_inuse(ni->mi.mrec) &&
+	    !(ni->mi.sbi->flags & NTFS_FLAGS_LOG_REPLAYING))
 		ni_delete_all(ni);
 
 	al_destroy(ni);