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[2620:137:e000::1:20]) by mx.google.com with ESMTP id b5-20020a63eb45000000b0053b8c98d14bsi13105776pgk.859.2023.06.16.22.56.36; Fri, 16 Jun 2023 22:56:53 -0700 (PDT) Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) client-ip=2620:137:e000::1:20; Authentication-Results: mx.google.com; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=fail (p=NONE sp=NONE dis=NONE) header.from=appspotmail.com Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232674AbjFQFO0 (ORCPT + 99 others); Sat, 17 Jun 2023 01:14:26 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:46518 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229852AbjFQFOX (ORCPT ); Sat, 17 Jun 2023 01:14:23 -0400 Received: from mail-io1-f69.google.com (mail-io1-f69.google.com [209.85.166.69]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 904EF1AB for ; Fri, 16 Jun 2023 22:14:22 -0700 (PDT) Received: by mail-io1-f69.google.com with SMTP id ca18e2360f4ac-77d99de0e9bso139218939f.3 for ; Fri, 16 Jun 2023 22:14:22 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20221208; t=1686978862; x=1689570862; h=to:from:subject:message-id:in-reply-to:date:mime-version :x-gm-message-state:from:to:cc:subject:date:message-id:reply-to; bh=/ruLjNhk6fCywW5LUQo5nl6809b1AY9//IrZcqzckXw=; b=jd8GIc/aQZq+8wtWRKVOSelAzki/OcAxydTP8YtBfJtDFITxv+JJiuDf70LGxKxS8G EyLn+Sx7dXT9PHYp+SWlR3DG2MS0OOSqhqX8z4E1Kx/A9fb7VKa+gY9coX04HTg8bwM5 vgUDm+DgE4A0FtvODLKz2dJegFOtVIkPuGAMk7MDRxnvk9SY05eRp4xt1gvkJw3KV48s 2tYlklayqoVrwwzsKg/v1fweITM54lflNi0tNuHLwKRSnursYGSaAnGlbTCubxHghQ/p eSGPpfvhPvrua+HRStl5zzQFNKSYfX6YwQnbsM5Tq+plltu9QKlyqGv0DmeZZiU8/Gtk loWw== X-Gm-Message-State: AC+VfDz+ZwcTRRaGzj4Ikxi94oA0OW5kH9CVXfu0iKkY/iY9q6DZ3NUp TreUUBY+f4XJhRx7yExNMYWqoW2WZzGoPNnaeqlxJqydQDHg MIME-Version: 1.0 X-Received: by 2002:a05:6638:10fc:b0:426:26bf:5a60 with SMTP id g28-20020a05663810fc00b0042626bf5a60mr972100jae.5.1686978861956; Fri, 16 Jun 2023 22:14:21 -0700 (PDT) Date: Fri, 16 Jun 2023 22:14:21 -0700 In-Reply-To: <0000000000002b6ab405fe43af4a@google.com> X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <000000000000cf863605fe4c5f40@google.com> Subject: Re: [syzbot] [kernel?] possible deadlock in exit_itimers From: syzbot To: frederic@kernel.org, linux-kernel@vger.kernel.org, syzkaller-bugs@googlegroups.com, tglx@linutronix.de Content-Type: text/plain; charset="UTF-8" X-Spam-Status: No, score=-1.7 required=5.0 tests=BAYES_00,FROM_LOCAL_HEX, HEADER_FROM_DIFFERENT_DOMAINS,RCVD_IN_DNSWL_NONE,RCVD_IN_MSPIKE_H2, SPF_HELO_NONE,SPF_PASS,T_SCC_BODY_TEXT_LINE,URIBL_BLOCKED autolearn=no autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org 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()") For information about bisection process see: https://goo.gl/tpsmEJ#bisection