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 A4AC7EB64D7 for ; Sun, 18 Jun 2023 20:44:46 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229538AbjFRUom (ORCPT ); Sun, 18 Jun 2023 16:44:42 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:47898 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229456AbjFRUok (ORCPT ); Sun, 18 Jun 2023 16:44:40 -0400 Received: from galois.linutronix.de (Galois.linutronix.de [IPv6:2a0a:51c0:0:12e:550::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id D0DEB115 for ; Sun, 18 Jun 2023 13:44:39 -0700 (PDT) From: Thomas Gleixner DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linutronix.de; s=2020; t=1687121077; 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=Ot6UN4tAxlAZgUfveKMq9QeJmZYE4keoMfZF0zVbqQI=; b=KNj2sn6jgBOfumsMSXySYZRJRjuU2pre7jUil4ncjVMGOWjgbynTGXFpxR5fVpXFFf7nZ2 gbAx7yTGM7EELqgSeyGWSFa4B7btQo6DeGqHHs2lv6x4uaD7sjGbEHrA7QoXjgF/xK+WNE q7WPP9ei60j98j6gc78uNDR7MyBrCBoLrWFCAr5wmu3jwRyp249xcUKPDWSpP0PjeEoL/y UcWNqCK6tMt5Z18pXIktgGoryWJ3yF3QgNarkS9gcvUdt0IwfbjIx6/zZxr8mWTz/Uv/Hj LjBaeCY2rDyknLXQVboAXJTHR3yfxV8Kot4jSv8Z0BrnPE6ZDQ1YDpUO0f6f6Q== DKIM-Signature: v=1; a=ed25519-sha256; c=relaxed/relaxed; d=linutronix.de; s=2020e; t=1687121077; 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=Ot6UN4tAxlAZgUfveKMq9QeJmZYE4keoMfZF0zVbqQI=; b=4RG0qWSkOJUZcHcYtSVe21Y4ydtAoxuXu4h9fvcj4r/Wjovqcgr8yzo6J+CXtjkuKsMHMs EektSEKvsFClplBg== To: syzbot , frederic@kernel.org, linux-kernel@vger.kernel.org, syzkaller-bugs@googlegroups.com Subject: Re: [syzbot] [kernel?] possible deadlock in exit_itimers In-Reply-To: <000000000000cf863605fe4c5f40@google.com> References: <000000000000cf863605fe4c5f40@google.com> Date: Sun, 18 Jun 2023 22:44:36 +0200 Message-ID: <87v8fkqz4b.ffs@tglx> MIME-Version: 1.0 Content-Type: text/plain Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Fri, Jun 16 2023 at 22:14, syzbot wrote: > syzbot has bisected this issue to: > > commit 1b59b2577582f9cf3d0f17245675a76859175cc1 > Author: Thomas Gleixner > Date: Thu Jun 1 20:16:34 2023 +0000 > > posix-timers: Prevent RT livelock in itimer_delete() > > bisection log: https://syzkaller.appspot.com/x/bisect.txt?x=106d46e3280000 > start commit: f7efed9f38f8 Add linux-next specific files for 20230616 > git tree: linux-next > final oops: https://syzkaller.appspot.com/x/report.txt?x=126d46e3280000 > console output: https://syzkaller.appspot.com/x/log.txt?x=146d46e3280000 > kernel config: https://syzkaller.appspot.com/x/.config?x=60b1a32485a77c16 > dashboard link: https://syzkaller.appspot.com/bug?extid=5fd924f4cd9dc1c7828c > syz repro: https://syzkaller.appspot.com/x/repro.syz?x=1401d8ef280000 > C reproducer: https://syzkaller.appspot.com/x/repro.c?x=176b45cf280000 > > Reported-by: syzbot+5fd924f4cd9dc1c7828c@syzkaller.appspotmail.com > Fixes: 1b59b2577582 ("posix-timers: Prevent RT livelock in itimer_delete()") I've amended the original commit as that is tagged stable. Thanks for chatching this and reporting! tglx