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 mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id B5EA5C433F5 for ; Sat, 16 Oct 2021 23:32:12 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 8A51560F93 for ; Sat, 16 Oct 2021 23:32:12 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S241174AbhJPXeS (ORCPT ); Sat, 16 Oct 2021 19:34:18 -0400 Received: from mail-il1-f197.google.com ([209.85.166.197]:53101 "EHLO mail-il1-f197.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S237004AbhJPXeO (ORCPT ); Sat, 16 Oct 2021 19:34:14 -0400 Received: by mail-il1-f197.google.com with SMTP id h6-20020a92c266000000b002590d9f7d14so6016752ild.19 for ; Sat, 16 Oct 2021 16:32:06 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:mime-version:date:in-reply-to:message-id:subject :from:to; bh=wnuC2jfmRKZbiKnJzBxyDjqgI+D2ZB0+y3fOM/x87AM=; b=dskABVvppPdGigHlLB2J9hmHlkyB4AETx+yBBmA5GOTWMc2wUBleIOpBpep/Ga/8ki 6CbAm8iBqXuf9v7KzfLxztiPiqHa9RXqPiRWBIW413P1qOPQ9OSf0hVXf4DODfRIBvVR Rg+p+XP1A9PP7jffbzHPij1cIiGO7gqEMjG2Rw26qUTHvv+LoRu3dQlzYXZXop1ScwYk Bleoog2e0KBOS3f80Yojhw/wSeog6Cdpd0us96v0vm6y1QKM+l5TeA5JA+HFZytbcd6L zCMDR9v2bPoaj+CSRRpm1v+L39TtQR4DhneaUjkECx7vg/Zbp/qdpbUhQLGhj0/xCoCa fQKA== X-Gm-Message-State: AOAM533LWcgmGJilth0Cn8f6LGu0LjQIrisx3ee+9fs0a2JMJZpr0WhS C6pA2AAQ5yngF66pBSR3MBQ148/5D5Lpjn7bSZpj3E7YQXmu X-Google-Smtp-Source: ABdhPJzj/Na0ZjhV6HLcRWRCruLqzRS7fv64inlhQqqVrHbOQ05YDV3piUnTEBm5cZTiLGVaha1DQYNs7ytMyGAvOFr5LmsYkFKN MIME-Version: 1.0 X-Received: by 2002:a5e:9b18:: with SMTP id j24mr9447650iok.202.1634427125977; Sat, 16 Oct 2021 16:32:05 -0700 (PDT) Date: Sat, 16 Oct 2021 16:32:05 -0700 In-Reply-To: <000000000000cf252605ce67014a@google.com> X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <00000000000041567305ce80b8af@google.com> Subject: Re: [syzbot] possible deadlock in wake_up_all_idle_cpus From: syzbot To: bigeasy@linutronix.de, bristot@redhat.com, bsegall@google.com, dietmar.eggemann@arm.com, gor@linux.ibm.com, jgross@suse.com, juri.lelli@redhat.com, linux-kernel@vger.kernel.org, mgorman@suse.de, mingo@kernel.org, mingo@redhat.com, namit@vmware.com, peterz@infradead.org, rdunlap@infradead.org, rostedt@goodmis.org, syzkaller-bugs@googlegroups.com, vincent.guittot@linaro.org Content-Type: text/plain; charset="UTF-8" Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org syzbot has bisected this issue to: commit 8850cb663b5cda04d33f9cfbc38889d73d3c8e24 Author: Peter Zijlstra Date: Tue Sep 21 20:16:02 2021 +0000 sched: Simplify wake_up_*idle*() bisection log: https://syzkaller.appspot.com/x/bisect.txt?x=117802fb300000 start commit: 7c832d2f9b95 Add linux-next specific files for 20211015 git tree: linux-next final oops: https://syzkaller.appspot.com/x/report.txt?x=137802fb300000 console output: https://syzkaller.appspot.com/x/log.txt?x=157802fb300000 kernel config: https://syzkaller.appspot.com/x/.config?x=f6ac42766a768877 dashboard link: https://syzkaller.appspot.com/bug?extid=d5b23b18d2f4feae8a67 syz repro: https://syzkaller.appspot.com/x/repro.syz?x=14e920fcb00000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=13b83d80b00000 Reported-by: syzbot+d5b23b18d2f4feae8a67@syzkaller.appspotmail.com Fixes: 8850cb663b5c ("sched: Simplify wake_up_*idle*()") For information about bisection process see: https://goo.gl/tpsmEJ#bisection