From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 5207933A712; Fri, 9 Jan 2026 11:54:44 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1767959684; cv=none; b=u9x42vIgArgJPQ+IAXi2znHrpdAG8oRnwaeGIwOUBBPbKS8hF+2YyztH2nWUOIlWWlFZJn4FmlBioCN4uD1Rhs3Opo315UmYXx/ua4pPgNOF0gl2ywrcLbO0O+ppgKU0RPdAqMeImo57Om/cpJesKRzgtIEgIK498syOWzGPUT8= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1767959684; c=relaxed/simple; bh=0pPPTNZgjSENzBh8/U5kSW78eoas0jnX1DSMH5eB5Lg=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=Oh6bM0FBa+x9KctD00qE7Q64SXaW3aqPSkXdgqdL3SmW8ZmnPCmmTcX1lrLPx6b4r9u+tVlmGcvdzncgbyqr98G4PTLE0XXI9k3L36FxsrgcIRbytmoj1mBuOj6DAUxGSaAgwv0AeTPWd0LKgMGrCAZKkZnZ/yNdq7gjAfqhlfE= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=Tv2qE9GT; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b="Tv2qE9GT" Received: by smtp.kernel.org (Postfix) with ESMTPSA id C60F5C4CEF1; Fri, 9 Jan 2026 11:54:43 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1767959684; bh=0pPPTNZgjSENzBh8/U5kSW78eoas0jnX1DSMH5eB5Lg=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=Tv2qE9GTDJpT9+yFKhrb/FCD5Z9oZLKeb8NsBjbGbSsvIhnIY9WQyu29m7fSeyf6N hVNTXZ8tYkb4UhA0FdvCm5hAKWELBa+sOwuHrdgi49d46XylhLdiQ2NYLlgWCLzFm1 d+tai+LyEnO2g52FxiZU/DgUbQxuKVwd5ClN8lgA= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, syzbot+bdeb22a4b9a09ab9aa45@syzkaller.appspotmail.com, Edward Adam Davis , Konstantin Komarov , Sasha Levin Subject: [PATCH 6.6 137/737] ntfs3: init run lock for extend inode Date: Fri, 9 Jan 2026 12:34:36 +0100 Message-ID: <20260109112139.154890263@linuxfoundation.org> X-Mailer: git-send-email 2.52.0 In-Reply-To: <20260109112133.973195406@linuxfoundation.org> References: <20260109112133.973195406@linuxfoundation.org> User-Agent: quilt/0.69 X-stable: review X-Patchwork-Hint: ignore Precedence: bulk X-Mailing-List: stable@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit 6.6-stable review patch. If anyone has any objections, please let me know. ------------------ From: Edward Adam Davis [ Upstream commit be99c62ac7e7af514e4b13f83c891a3cccefaa48 ] After setting the inode mode of $Extend to a regular file, executing the truncate system call will enter the do_truncate() routine, causing the run_lock uninitialized error reported by syzbot. Prior to patch 4e8011ffec79, if the inode mode of $Extend was not set to a regular file, the do_truncate() routine would not be entered. Add the run_lock initialization when loading $Extend. syzbot reported: INFO: trying to register non-static key. Call Trace: dump_stack_lvl+0x189/0x250 lib/dump_stack.c:120 assign_lock_key+0x133/0x150 kernel/locking/lockdep.c:984 register_lock_class+0x105/0x320 kernel/locking/lockdep.c:1299 __lock_acquire+0x99/0xd20 kernel/locking/lockdep.c:5112 lock_acquire+0x120/0x360 kernel/locking/lockdep.c:5868 down_write+0x96/0x1f0 kernel/locking/rwsem.c:1590 ntfs_set_size+0x140/0x200 fs/ntfs3/inode.c:860 ntfs_extend+0x1d9/0x970 fs/ntfs3/file.c:387 ntfs_setattr+0x2e8/0xbe0 fs/ntfs3/file.c:808 Fixes: 4e8011ffec79 ("ntfs3: pretend $Extend records as regular files") Reported-by: syzbot+bdeb22a4b9a09ab9aa45@syzkaller.appspotmail.com Closes: https://syzkaller.appspot.com/bug?extid=bdeb22a4b9a09ab9aa45 Tested-by: syzbot+bdeb22a4b9a09ab9aa45@syzkaller.appspotmail.com Signed-off-by: Edward Adam Davis Signed-off-by: Konstantin Komarov Signed-off-by: Sasha Levin --- fs/ntfs3/inode.c | 1 + 1 file changed, 1 insertion(+) diff --git a/fs/ntfs3/inode.c b/fs/ntfs3/inode.c index f27e25776b730..76326299ba368 100644 --- a/fs/ntfs3/inode.c +++ b/fs/ntfs3/inode.c @@ -465,6 +465,7 @@ static struct inode *ntfs_read_mft(struct inode *inode, /* Records in $Extend are not a files or general directories. */ inode->i_op = &ntfs_file_inode_operations; mode = S_IFREG; + init_rwsem(&ni->file.run_lock); } else { err = -EINVAL; goto out; -- 2.51.0