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 X-Spam-Level: X-Spam-Status: No, score=-5.8 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI, SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED autolearn=no autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 8882AC432BE for ; Wed, 1 Sep 2021 19:52:30 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 60AD961074 for ; Wed, 1 Sep 2021 19:52:30 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S235304AbhIATx0 (ORCPT ); Wed, 1 Sep 2021 15:53:26 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:48966 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230353AbhIATxZ (ORCPT ); Wed, 1 Sep 2021 15:53:25 -0400 Received: from galois.linutronix.de (Galois.linutronix.de [IPv6:2a0a:51c0:0:12e:550::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 36C59C061575 for ; Wed, 1 Sep 2021 12:52:28 -0700 (PDT) From: Thomas Gleixner DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linutronix.de; s=2020; t=1630525945; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:mime-version:mime-version:content-type:content-type: in-reply-to:in-reply-to:references:references; bh=GSRhAxPtx88bURKwE5S92sADqnou/RaVw+AB4weTUvI=; b=yBVdRuRGHTZZrEtmXU04MKNvPilbczcQucHvriaSOFS7PCkI83Ep7OD4HtvZ5UNcB3qf56 qmXlO+qwDfYY3+hgBKJcCgF37OPNAzV16XjEg8UszA4MIvsJ7oliw+F54+sUjJQhBC+m9v BZUXbQKLTJMcvyYehaYkH6d+vyGFFHAD9CFMs9RaAnWswXiK0jqG1Hw6905yX4+1y9X/Xw RAQ4HtfsUyMsmJdVWatoDShFAg//B05iD/NAqtlPHW1bNis9HleMsG2b74C2RltiAEQ7lU k24LfJmE5LTxI9Ry6CPIY1eQBEBlKvTu/VOjE5Q/3Kr+w+ltSRbRKzSSj3wohQ== DKIM-Signature: v=1; a=ed25519-sha256; c=relaxed/relaxed; d=linutronix.de; s=2020e; t=1630525945; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:mime-version:mime-version:content-type:content-type: in-reply-to:in-reply-to:references:references; bh=GSRhAxPtx88bURKwE5S92sADqnou/RaVw+AB4weTUvI=; b=ARO8n8Bllvj+4NwKXtvPoOhGbPYSGg5VyQwPKYcjWGhDbzIrOVFrYutlLEWx96zdgdK5iN PnxxYe+6LPRWyNCw== To: syzbot , dave@stgolabs.net, dvhart@infradead.org, linux-kernel@vger.kernel.org, mingo@redhat.com, peterz@infradead.org, syzkaller-bugs@googlegroups.com Subject: Re: [syzbot] WARNING in futex_requeue In-Reply-To: <0000000000002b577805caef03d8@google.com> References: <0000000000002b577805caef03d8@google.com> Date: Wed, 01 Sep 2021 21:52:25 +0200 Message-ID: <87fsuocbuu.ffs@tglx> MIME-Version: 1.0 Content-Type: text/plain Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Wed, Sep 01 2021 at 06:26, syzbot wrote: > syzbot found the following issue on: > > HEAD commit: b91db6a0b52e Merge tag 'for-5.15/io_uring-vfs-2021-08-30' .. > git tree: upstream > console output: https://syzkaller.appspot.com/x/log.txt?x=17907235300000 > kernel config: https://syzkaller.appspot.com/x/.config?x=961d30359ac81f8c > dashboard link: https://syzkaller.appspot.com/bug?extid=4d1bd0725ef09168e1a0 > compiler: Debian clang version 11.0.1-2, GNU ld (GNU Binutils for Debian) 2.35.1 > syz repro: https://syzkaller.appspot.com/x/repro.syz?x=1222185d300000 > > IMPORTANT: if you fix the issue, please add the following tag to the commit: > Reported-by: syzbot+4d1bd0725ef09168e1a0@syzkaller.appspotmail.com > > ------------[ cut here ]------------ > WARNING: CPU: 1 PID: 5701 at kernel/futex.c:2259 futex_requeue+0x1467/0x2d50 kernel/futex.c:2259 Doh. That Gleixner dude did not think this through completely. Fix will follow. Thanks, tglx