From: Konstantin Komarov almaz.alexandrovich@paragon-software.com

stable inclusion from stable-v5.15.171 commit 47e8a17491e37df53743bc2e72309f8f0d6224af category: bugfix bugzilla: https://gitee.com/src-openeuler/kernel/issues/IB37AB CVE: CVE-2024-50245

Reference: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=...

-------------------------------------------------

[ Upstream commit 03b097099eef255fbf85ea6a786ae3c91b11f041 ]

Mutex lock with another subclass used in ni_lock_dir().

Fixes: 374d4c9cc51b ("fs/ntfs3: Add file operations and implementation") Reported-by: syzbot+bc7ca0ae4591cb2550f9@syzkaller.appspotmail.com Signed-off-by: Konstantin Komarov almaz.alexandrovich@paragon-software.com Signed-off-by: Sasha Levin sashal@kernel.org Signed-off-by: Zizhi Wo wozizhi@huawei.com --- fs/ntfs3/namei.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/fs/ntfs3/namei.c b/fs/ntfs3/namei.c index 945dcf7a34d9..50d6d9fbcf67 100644 --- a/fs/ntfs3/namei.c +++ b/fs/ntfs3/namei.c @@ -79,7 +79,7 @@ static struct dentry *ntfs_lookup(struct inode *dir, struct dentry *dentry, if (err < 0) inode = ERR_PTR(err); else { - ni_lock(ni); + ni_lock_dir(ni); inode = dir_search_u(dir, uni, NULL); ni_unlock(ni); }