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 003BBC43334 for ; Mon, 20 Jun 2022 08:13:46 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S238339AbiFTINp (ORCPT ); Mon, 20 Jun 2022 04:13:45 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:33072 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S239730AbiFTINd (ORCPT ); Mon, 20 Jun 2022 04:13:33 -0400 Received: from mail-il1-f200.google.com (mail-il1-f200.google.com [209.85.166.200]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 44979A467 for ; Mon, 20 Jun 2022 01:13:30 -0700 (PDT) Received: by mail-il1-f200.google.com with SMTP id i2-20020a056e021d0200b002d8ff49e7c4so2976363ila.8 for ; Mon, 20 Jun 2022 01:13:30 -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:message-id:subject:from:to; bh=9ywDEso0dQZcglSpzFj/mt9efOmvvmhNQfcEW/85dMI=; b=6luaufhf4Yb2a/nS9ZikQa8+8YeKi1NFaYYnOV4LBHhpQW4X5MZpFKFrRaysgD+CKc N/xKqH0kqEsAQOQ6AX+3iDsd4/6EixoLxdNBPGAsXCMjhsTRM+Af2w7nsWhfYDcHJvw/ TOoKtEvcUuwPuCIkej2fKFZYo19Gusur5W3/97Ag7otJMpf5yl/saNV4w0yllkYUHl1g T8GC1K1fJDREgi+MWRYwWkIN5IMb7MHf0mPyKcMEOfsjZxcpl/sxDM06k7oauVG1dxED L2qkXrvs9RciSFlASWPrkK4jIpt+M8iBIpbqyeRMTUGoctC3OWWmQCE6xnnFQfvgk75P deZw== X-Gm-Message-State: AJIora/h0Ms1kl4GdsXqnSDC7oxyEQbpAhIOvxkkUuUH7r2KMajXIN92 sn28Hh6fKYY4rtnBu8nVDhSyN9Nb31aIsIc4Je/dFaQJ9Lqt X-Google-Smtp-Source: AGRyM1vQ2Kzp9ibANk2E6+AdQKZU4mfee24UKOGtvBvW0rCeru0G9qq4QAoTrItBfymsmhjlMhJMgiI3NFhMSYkrWmC1IJ8XKNGF MIME-Version: 1.0 X-Received: by 2002:a92:c909:0:b0:2d9:1e8f:276c with SMTP id t9-20020a92c909000000b002d91e8f276cmr419529ilp.305.1655712809905; Mon, 20 Jun 2022 01:13:29 -0700 (PDT) Date: Mon, 20 Jun 2022 01:13:29 -0700 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <000000000000e2769d05e1dcadd0@google.com> Subject: [syzbot] WARNING: suspicious RCU usage in atomic_notifier_call_chain From: syzbot To: bigeasy@linutronix.de, bp@suse.de, dmitry.osipenko@collabora.com, linux-kernel@vger.kernel.org, mirq-linux@rere.qmqm.pl, rafael.j.wysocki@intel.com, syzkaller-bugs@googlegroups.com, vschneid@redhat.com Content-Type: text/plain; charset="UTF-8" Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hello, syzbot found the following issue on: HEAD commit: 07dc787be231 Add linux-next specific files for 20220617 git tree: linux-next console output: https://syzkaller.appspot.com/x/log.txt?x=13f4d5d8080000 kernel config: https://syzkaller.appspot.com/x/.config?x=d2512136c9b01d87 dashboard link: https://syzkaller.appspot.com/bug?extid=3333557f53051744538d compiler: gcc (Debian 10.2.1-6) 10.2.1 20210110, GNU ld (GNU Binutils for Debian) 2.35.2 Unfortunately, I don't have any reproducer for this issue yet. IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+3333557f53051744538d@syzkaller.appspotmail.com arch_call_rest_init+0xf/0x14 init/main.c:886 start_kernel+0x473/0x494 init/main.c:1142 secondary_startup_64_no_verify+0xce/0xdb ============================= WARNING: suspicious RCU usage 5.19.0-rc2-next-20220617-syzkaller #0 Not tainted ----------------------------- include/linux/rcupdate.h:707 rcu_read_lock() used illegally while idle! other info that might help us debug this: rcu_scheduler_active = 2, debug_locks = 1 RCU used illegally from extended quiescent state! 1 lock held by swapper/0/0: #0: ffffffff8bd87780 (rcu_read_lock){....}-{1:2}, at: atomic_notifier_call_chain+0x0/0x180 kernel/notifier.c:455 stack backtrace: CPU: 0 PID: 0 Comm: swapper/0 Not tainted 5.19.0-rc2-next-20220617-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0xcd/0x134 lib/dump_stack.c:106 rcu_read_lock include/linux/rcupdate.h:707 [inline] atomic_notifier_call_chain+0x112/0x180 kernel/notifier.c:224 panic+0x35f/0x64a kernel/panic.c:316 __warn.cold+0x1ea/0x2cd kernel/panic.c:627 report_bug+0x1bc/0x210 lib/bug.c:198 handle_bug+0x3c/0x60 arch/x86/kernel/traps.c:316 exc_invalid_op+0x14/0x40 arch/x86/kernel/traps.c:336 asm_exc_invalid_op+0x1b/0x20 arch/x86/include/asm/idtentry.h:568 RIP: 0010:ct_idle_exit+0x34/0x40 kernel/context_tracking.c:335 Code: 00 02 00 00 31 ff 48 89 de 0f 1f 44 00 00 48 85 db 75 12 0f 1f 44 00 00 5b be 03 00 00 00 31 ff e9 01 fe ff ff 0f 1f 44 00 00 <0f> 0b eb e5 0f 1f 84 00 00 00 00 00 41 56 41 55 41 54 41 89 f4 55 RSP: 0018:ffffffff8ba07d90 EFLAGS: 00010206 RAX: 0000000000000000 RBX: 0000000000000200 RCX: 0000000000000000 RDX: ffffffff8babc980 RSI: 0000000000000200 RDI: 0000000000000000 RBP: ffffffff8c7c0200 R08: 0000000000000005 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000001 R12: 0000000000000000 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 cpuidle_enter_state+0x6f7/0xc80 drivers/cpuidle/cpuidle.c:240 cpuidle_enter+0x4a/0xa0 drivers/cpuidle/cpuidle.c:352 call_cpuidle kernel/sched/idle.c:155 [inline] cpuidle_idle_call kernel/sched/idle.c:236 [inline] do_idle+0x3e8/0x590 kernel/sched/idle.c:303 cpu_startup_entry+0x14/0x20 kernel/sched/idle.c:400 rest_init+0x169/0x270 init/main.c:729 arch_call_rest_init+0xf/0x14 init/main.c:886 start_kernel+0x473/0x494 init/main.c:1142 secondary_startup_64_no_verify+0xce/0xdb Kernel Offset: disabled ============================= WARNING: suspicious RCU usage 5.19.0-rc2-next-20220617-syzkaller #0 Not tainted ----------------------------- include/linux/rcupdate.h:735 rcu_read_unlock() used illegally while idle! other info that might help us debug this: rcu_scheduler_active = 2, debug_locks = 1 RCU used illegally from extended quiescent state! 1 lock held by swapper/0/0: #0: ffffffff8bd87780 (rcu_read_lock){....}-{1:2}, at: atomic_notifier_call_chain+0x0/0x180 kernel/notifier.c:455 stack backtrace: CPU: 0 PID: 0 Comm: swapper/0 Not tainted 5.19.0-rc2-next-20220617-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0xcd/0x134 lib/dump_stack.c:106 rcu_read_unlock include/linux/rcupdate.h:735 [inline] atomic_notifier_call_chain+0x175/0x180 kernel/notifier.c:226 panic+0x35f/0x64a kernel/panic.c:316 __warn.cold+0x1ea/0x2cd kernel/panic.c:627 report_bug+0x1bc/0x210 lib/bug.c:198 handle_bug+0x3c/0x60 arch/x86/kernel/traps.c:316 exc_invalid_op+0x14/0x40 arch/x86/kernel/traps.c:336 asm_exc_invalid_op+0x1b/0x20 arch/x86/include/asm/idtentry.h:568 RIP: 0010:ct_idle_exit+0x34/0x40 kernel/context_tracking.c:335 Code: 00 02 00 00 31 ff 48 89 de 0f 1f 44 00 00 48 85 db 75 12 0f 1f 44 00 00 5b be 03 00 00 00 31 ff e9 01 fe ff ff 0f 1f 44 00 00 <0f> 0b eb e5 0f 1f 84 00 00 00 00 00 41 56 41 55 41 54 41 89 f4 55 RSP: 0018:ffffffff8ba07d90 EFLAGS: 00010206 RAX: 0000000000000000 RBX: 0000000000000200 RCX: 0000000000000000 RDX: ffffffff8babc980 RSI: 0000000000000200 RDI: 0000000000000000 RBP: ffffffff8c7c0200 R08: 0000000000000005 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000001 R12: 0000000000000000 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 cpuidle_enter_state+0x6f7/0xc80 drivers/cpuidle/cpuidle.c:240 cpuidle_enter+0x4a/0xa0 drivers/cpuidle/cpuidle.c:352 call_cpuidle kernel/sched/idle.c:155 [inline] cpuidle_idle_call kernel/sched/idle.c:236 [inline] do_idle+0x3e8/0x590 kernel/sched/idle.c:303 cpu_startup_entry+0x14/0x20 kernel/sched/idle.c:400 rest_init+0x169/0x270 init/main.c:729 arch_call_rest_init+0xf/0x14 init/main.c:886 start_kernel+0x473/0x494 init/main.c:1142 secondary_startup_64_no_verify+0xce/0xdb ============================= WARNING: suspicious RCU usage 5.19.0-rc2-next-20220617-syzkaller #0 Not tainted ----------------------------- include/linux/rcupdate.h:707 rcu_read_lock() used illegally while idle! other info that might help us debug this: rcu_scheduler_active = 2, debug_locks = 1 RCU used illegally from extended quiescent state! 1 lock held by swapper/0/0: #0: ffffffff8bd87780 (rcu_read_lock){....}-{1:2}, at: kmsg_dump+0x0/0x260 kernel/printk/printk.c:3982 stack backtrace: CPU: 0 PID: 0 Comm: swapper/0 Not tainted 5.19.0-rc2-next-20220617-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0xcd/0x134 lib/dump_stack.c:106 rcu_read_lock include/linux/rcupdate.h:707 [inline] kmsg_dump+0x1c8/0x260 kernel/printk/printk.c:4122 panic+0x36e/0x64a kernel/panic.c:320 __warn.cold+0x1ea/0x2cd kernel/panic.c:627 report_bug+0x1bc/0x210 lib/bug.c:198 handle_bug+0x3c/0x60 arch/x86/kernel/traps.c:316 exc_invalid_op+0x14/0x40 arch/x86/kernel/traps.c:336 asm_exc_invalid_op+0x1b/0x20 arch/x86/include/asm/idtentry.h:568 RIP: 0010:ct_idle_exit+0x34/0x40 kernel/context_tracking.c:335 Code: 00 02 00 00 31 ff 48 89 de 0f 1f 44 00 00 48 85 db 75 12 0f 1f 44 00 00 5b be 03 00 00 00 31 ff e9 01 fe ff ff 0f 1f 44 00 00 <0f> 0b eb e5 0f 1f 84 00 00 00 00 00 41 56 41 55 41 54 41 89 f4 55 RSP: 0018:ffffffff8ba07d90 EFLAGS: 00010206 RAX: 0000000000000000 RBX: 0000000000000200 RCX: 0000000000000000 RDX: ffffffff8babc980 RSI: 0000000000000200 RDI: 0000000000000000 RBP: ffffffff8c7c0200 R08: 0000000000000005 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000001 R12: 0000000000000000 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 cpuidle_enter_state+0x6f7/0xc80 drivers/cpuidle/cpuidle.c:240 cpuidle_enter+0x4a/0xa0 drivers/cpuidle/cpuidle.c:352 call_cpuidle kernel/sched/idle.c:155 [inline] cpuidle_idle_call kernel/sched/idle.c:236 [inline] do_idle+0x3e8/0x590 kernel/sched/idle.c:303 cpu_startup_entry+0x14/0x20 kernel/sched/idle.c:400 rest_init+0x169/0x270 init/main.c:729 arch_call_rest_init+0xf/0x14 init/main.c:886 start_kernel+0x473/0x494 init/main.c:1142 secondary_startup_64_no_verify+0xce/0xdb ============================= WARNING: suspicious RCU usage 5.19.0-rc2-next-20220617-syzkaller #0 Not tainted ----------------------------- include/linux/rcupdate.h:735 rcu_read_unlock() used illegally while idle! other info that might help us debug this: rcu_scheduler_active = 2, debug_locks = 1 RCU used illegally from extended quiescent state! 1 lock held by swapper/0/0: #0: ffffffff8bd87780 (rcu_read_lock){....}-{1:2}, at: kmsg_dump+0x0/0x260 kernel/printk/printk.c:3982 stack backtrace: CPU: 0 PID: 0 Comm: swapper/0 Not tainted 5.19.0-rc2-next-20220617-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0xcd/0x134 lib/dump_stack.c:106 rcu_read_unlock include/linux/rcupdate.h:735 [inline] kmsg_dump+0x22b/0x260 kernel/printk/printk.c:4140 panic+0x36e/0x64a kernel/panic.c:320 __warn.cold+0x1ea/0x2cd kernel/panic.c:627 report_bug+0x1bc/0x210 lib/bug.c:198 handle_bug+0x3c/0x60 arch/x86/kernel/traps.c:316 exc_invalid_op+0x14/0x40 arch/x86/kernel/traps.c:336 asm_exc_invalid_op+0x1b/0x20 arch/x86/include/asm/idtentry.h:568 RIP: 0010:ct_idle_exit+0x34/0x40 kernel/context_tracking.c:335 Code: 00 02 00 00 31 ff 48 89 de 0f 1f 44 00 00 48 85 db 75 12 0f 1f 44 00 00 5b be 03 00 00 00 31 ff e9 01 fe ff ff 0f 1f 44 00 00 <0f> 0b eb e5 0f 1f 84 00 00 00 00 00 41 56 41 55 41 54 41 89 f4 55 RSP: 0018:ffffffff8ba07d90 EFLAGS: 00010206 RAX: 0000000000000000 RBX: 0000000000000200 RCX: 0000000000000000 RDX: ffffffff8babc980 RSI: 0000000000000200 RDI: 0000000000000000 RBP: ffffffff8c7c0200 R08: 0000000000000005 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000001 R12: 0000000000000000 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 cpuidle_enter_state+0x6f7/0xc80 drivers/cpuidle/cpuidle.c:240 cpuidle_enter+0x4a/0xa0 drivers/cpuidle/cpuidle.c:352 call_cpuidle kernel/sched/idle.c:155 [inline] cpuidle_idle_call kernel/sched/idle.c:236 [inline] do_idle+0x3e8/0x590 kernel/sched/idle.c:303 cpu_startup_entry+0x14/0x20 kernel/sched/idle.c:400 rest_init+0x169/0x270 init/main.c:729 arch_call_rest_init+0xf/0x14 init/main.c:886 start_kernel+0x473/0x494 init/main.c:1142 secondary_startup_64_no_verify+0xce/0xdb Rebooting in 86400 seconds.. --- This report is generated by a bot. 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