From mboxrd@z Thu Jan 1 00:00:00 1970 From: Eric Biggers Subject: Re: WARNING: kernel stack regs has bad 'bp' value (2) Date: Thu, 30 Nov 2017 01:17:24 -0800 Message-ID: <20171130091724.GC5451@zzz.localdomain> References: <001a113f2cd26f3532055f0f4a79@google.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Cc: davem@davemloft.net, herbert@gondor.apana.org.au, hpa@zytor.com, linux-crypto@vger.kernel.org, linux-kernel@vger.kernel.org, syzkaller-bugs@googlegroups.com, tglx@linutronix.de, x86@kernel.org To: syzbot Return-path: Received: from mail-pf0-f180.google.com ([209.85.192.180]:41945 "EHLO mail-pf0-f180.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750849AbdK3JR2 (ORCPT ); Thu, 30 Nov 2017 04:17:28 -0500 Content-Disposition: inline In-Reply-To: <001a113f2cd26f3532055f0f4a79@google.com> Sender: linux-crypto-owner@vger.kernel.org List-ID: On Tue, Nov 28, 2017 at 10:36:01AM -0800, syzbot wrote: > WARNING: kernel stack regs at ffff8801c1e5f468 in syzkaller196611:6199 has > bad 'bp' value 0000000000000001 > unwind stack type:0 next_sp: (null) mask:0x6 graph_idx:0 > ffff8801db4075a8: ffff8801db407630 (0xffff8801db407630) > ffff8801db4075b0: ffffffff8128a84e (__save_stack_trace+0x6e/0xd0) > ffff8801db4075b8: 0000000000000000 ... > ffff8801db4075c0: ffff8801c1e58000 (0xffff8801c1e58000) > ffff8801db4075c8: ffff8801c1e60000 (0xffff8801c1e60000) > ffff8801db4075d0: 0000000000000000 ... > ffff8801db4075d8: 0000000000000006 (0x6) > ffff8801db4075e0: ffff8801c1e4e000 (0xffff8801c1e4e000) > ffff8801db4075e8: 0000010100000000 (0x10100000000) > ffff8801db4075f0: 0000000000000000 ... > ffff8801db4075f8: ffff8801db4075a8 (0xffff8801db4075a8) > ffff8801db407600: ffffffff8134ff7d (__twofish_enc_blk_3way+0x1b1d/0x1b30) Looks like the x86_64 "3 way" version of Twofish (twofish-x86_64-asm_64-3way.S) needs to be updated to not use %rbp. Eric