From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 79635C4167B for ; Mon, 27 Nov 2023 21:45:29 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S233054AbjK0VpV (ORCPT ); Mon, 27 Nov 2023 16:45:21 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:44442 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229821AbjK0VpS (ORCPT ); Mon, 27 Nov 2023 16:45:18 -0500 Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 9183095 for ; Mon, 27 Nov 2023 13:45:25 -0800 (PST) Received: by smtp.kernel.org (Postfix) with ESMTPSA id EFD74C433C8; Mon, 27 Nov 2023 21:45:23 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1701121525; bh=v18PiaiEjKMB6O0c6WVfzv26Yhzu0ATLF8LUD+Mc3eI=; h=Date:From:To:Cc:Subject:References:In-Reply-To:From; b=kUiXEgIZH34RrmOEyeP6RGujMJu1FHOUstkRzYXxApzFDUnkeKf4LzA/n499QsxbG cW/3bwe8V4W2gzsWsoiPy38lRufiN3hW+kmvsxVcDYXUfJpdwczBzdDZDHnL4lNKXA rRHzLImKsp0g1gpmQKNET2tzFOqGcW3wopfp5stWp3KZEAMfac/O0cKEMcbFXFKPrz TODq1qrteXLD39/AyVSikaReJwkGo0gyKU6ee4kgOnB8heguGQLX7Q7KcYRfoyPLB9 2HzbPiRBIkPg8B2XOuAusNYtEHVgTkK18R1iYh4BBpDk/pjJnCzbKB9XhI5pgWikTU kktxjuSJNjocA== Date: Mon, 27 Nov 2023 13:45:22 -0800 From: Eric Biggers To: syzbot Cc: jaegeuk@kernel.org, linux-fscrypt@vger.kernel.org, linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org, syzkaller-bugs@googlegroups.com, tytso@mit.edu Subject: Re: [syzbot] [fscrypt?] possible deadlock in fscrypt_initialize (2) Message-ID: <20231127214522.GA1463@sol.localdomain> References: <0000000000002f1a6205f5d8096b@google.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <0000000000002f1a6205f5d8096b@google.com> Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Wed, Mar 01, 2023 at 07:04:59AM -0800, syzbot wrote: > -> #0 (fscrypt_init_mutex){+.+.}-{3:3}: > check_prev_add kernel/locking/lockdep.c:3098 [inline] > check_prevs_add kernel/locking/lockdep.c:3217 [inline] > validate_chain kernel/locking/lockdep.c:3832 [inline] > __lock_acquire+0x2ec7/0x5d40 kernel/locking/lockdep.c:5056 > lock_acquire kernel/locking/lockdep.c:5669 [inline] > lock_acquire+0x1e3/0x670 kernel/locking/lockdep.c:5634 > __mutex_lock_common kernel/locking/mutex.c:603 [inline] > __mutex_lock+0x12f/0x1350 kernel/locking/mutex.c:747 > fscrypt_initialize+0x40/0xa0 fs/crypto/crypto.c:326 > fscrypt_setup_encryption_info+0xef/0xeb0 fs/crypto/keysetup.c:563 > fscrypt_get_encryption_info+0x375/0x450 fs/crypto/keysetup.c:668 > fscrypt_setup_filename+0x23c/0xec0 fs/crypto/fname.c:458 > ext4_fname_setup_filename+0x8c/0x110 fs/ext4/crypto.c:28 > ext4_add_entry+0x3aa/0xe30 fs/ext4/namei.c:2380 > ext4_rename+0x19ff/0x26d0 fs/ext4/namei.c:3911 > ext4_rename2+0x1c7/0x270 fs/ext4/namei.c:4193 > vfs_rename+0xef6/0x17a0 fs/namei.c:4772 > do_renameat2+0xb62/0xc90 fs/namei.c:4923 > __do_sys_renameat2 fs/namei.c:4956 [inline] > __se_sys_renameat2 fs/namei.c:4953 [inline] > __ia32_sys_renameat2+0xe8/0x120 fs/namei.c:4953 > do_syscall_32_irqs_on arch/x86/entry/common.c:112 [inline] > __do_fast_syscall_32+0x65/0xf0 arch/x86/entry/common.c:178 > do_fast_syscall_32+0x33/0x70 arch/x86/entry/common.c:203 > entry_SYSENTER_compat_after_hwframe+0x70/0x82 #syz dup: possible deadlock in start_this_handle (4) See https://lore.kernel.org/linux-fscrypt/Y%2F6aDmrx8Q9ob+Zi@sol.localdomain/ - Eric