fs/ntfs3: Additional check in ni_clear()

[ Upstream commit d178944db36b3369b78a08ba520de109b89bf2a9 ]

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>
Signed-off-by: Sasha Levin <sashal@kernel.org>

diff --git a/fs/ntfs3/frecord.c b/fs/ntfs3/frecord.c
index e19510f977112dd469a64f31ad6b6d4d85b076f9..d41ddc06f20715279d2de360498a26d5bccad204 100644 (file)
--- 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);