From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-oi1-f205.google.com (mail-oi1-f205.google.com [209.85.167.205]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 68F05303A04 for ; Tue, 28 Jul 2026 16:16:24 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.167.205 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1785255386; cv=none; b=k5AIcp6fPWdc3gfWJpDr77CHuJF8qYBUaPahatwzQshSC4EE1be2NVmGZucxc/U3GpYvpZNMzrA+CIAYzFtZK79Lwz783ZEtOQHZa8HKCP8pgjgJMF3PvbVpOTMIyB4CfrN2ltfZ77DhN6YZLW5hyLGN/v4AQKz6Wu1ZrIVpZ68= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1785255386; c=relaxed/simple; bh=gaRoBgwDc/kkTrxL4nw0uRSO/KlEff7Dffn6SUs3lns=; h=MIME-Version:Date:Message-ID:Subject:From:To:Content-Type; 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2002:a05:6808:1905:b0:495:fecb:bf9c with SMTP id 5614622812f47-4ad5b965d74mr1857004b6e.6.1785255383287; Tue, 28 Jul 2026 09:16:23 -0700 (PDT) Date: Tue, 28 Jul 2026 09:16:23 -0700 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <6a68d5d7.e3659fcc.2a40b8.0016.GAE@google.com> Subject: [syzbot] [pm?] WARNING in ct_kernel_exit From: syzbot To: lenb@kernel.org, linux-kernel@vger.kernel.org, linux-pm@vger.kernel.org, pavel@kernel.org, rafael@kernel.org, syzkaller-bugs@googlegroups.com Content-Type: text/plain; charset="UTF-8" Hello, syzbot found the following issue on: HEAD commit: 365f9c7a6b81 Merge branches 'for-next/core' and 'for-next/.. git tree: git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci console output: https://syzkaller.appspot.com/x/log.txt?x=127b16b9580000 kernel config: https://syzkaller.appspot.com/x/.config?x=72c97575381cec47 dashboard link: https://syzkaller.appspot.com/bug?extid=79883955da3a62652a80 compiler: Debian clang version 22.1.8 (++20260613092233+e80beda6e255-1~exp1~20260613092250.77), Debian LLD 22.1.8 userspace arch: arm64 syz repro: https://syzkaller.appspot.com/x/repro.syz?x=124451b9580000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=122f9632580000 Downloadable assets: disk image: https://storage.googleapis.com/syzbot-assets/eafe0adb7386/disk-365f9c7a.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/29422d607579/vmlinux-365f9c7a.xz kernel image: https://storage.googleapis.com/syzbot-assets/98ca955a8b54/Image-365f9c7a.gz.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+79883955da3a62652a80@syzkaller.appspotmail.com vhci_hcd vhci_hcd.1: suspend vhci_hcd vhci_hcd vhci_hcd.0: suspend vhci_hcd Disabling non-boot CPUs ... psci: CPU1 killed (polled 0 ms) ------------[ cut here ]------------ WARNING: kernel/context_tracking.c:120 at ct_kernel_exit+0x1b4/0x1f4 kernel/context_tracking.c:118, CPU#0: syz.1.501/5462 Modules linked in: CPU: 0 UID: 0 PID: 5462 Comm: syz.1.501 Not tainted syzkaller #0 PREEMPT Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 pstate: 634003c5 (nZCv DAIF +PAN -UAO +TCO +DIT -SSBS BTYPE=--) pc : ct_kernel_exit+0x1b4/0x1f4 kernel/context_tracking.c:118 lr : instrument_atomic_read include/linux/instrumented.h:82 [inline] lr : atomic_read include/linux/atomic/atomic-instrumented.h:32 [inline] lr : ct_rcu_watching include/linux/context_tracking_state.h:91 [inline] lr : ct_kernel_exit+0x13c/0x1f4 kernel/context_tracking.c:119 sp : ffff800095f775f0 x29: ffff800095f775f0 x28: dfff800000000000 x27: ffff800095f77660 x26: 00000000000000c0 x25: ffff700012beeecc x24: ffff800088abf998 x23: ffff800088b0b6a0 x22: ffff0001ade38998 x21: ffff0001ade38998 x20: 0000000000000000 x19: 0000000000000005 x18: 00000000ffffffff x17: ffff80008a791000 x16: 0000000000000005 x15: ffff80008a31ada0 x14: 0000000000000000 x13: 0000000000000001 x12: 0000000000000000 x11: 0000000000000000 x10: ffff600035bc7135 x9 : dfff800000000000 x8 : 0000000000000040 x7 : 0000000000000000 x6 : 000000000000003f x5 : 0000000000000040 x4 : 0000000000000008 x3 : ffff8000868e6858 x2 : 0000000000000000 x1 : 0000000000000004 x0 : 0000000000000001 Call trace: ct_kernel_exit+0x1b4/0x1f4 kernel/context_tracking.c:118 (P) ct_idle_enter+0x24/0x38 kernel/context_tracking.c:299 ct_cpuidle_enter include/linux/cpuidle.h:134 [inline] cpu_suspend+0x264/0x474 arch/arm64/kernel/suspend.c:140 psci_system_suspend_enter+0x4c/0x80 drivers/firmware/psci/psci.c:544 suspend_enter kernel/power/suspend.c:468 [inline] suspend_devices_and_enter+0x88c/0xd0c kernel/power/suspend.c:533 enter_state kernel/power/suspend.c:618 [inline] pm_suspend+0x498/0x698 kernel/power/suspend.c:644 state_store+0x14c/0x1fc kernel/power/main.c:819 kobj_attr_store+0x6c/0x90 lib/kobject.c:840 sysfs_kf_write+0xe0/0x108 fs/sysfs/file.c:145 kernfs_fop_write_iter+0x260/0x3b8 fs/kernfs/file.c:345 new_sync_write fs/read_write.c:595 [inline] vfs_write+0x51c/0xa0c fs/read_write.c:687 ksys_write+0x12c/0x228 fs/read_write.c:739 __do_sys_write fs/read_write.c:750 [inline] __se_sys_write fs/read_write.c:747 [inline] __arm64_sys_write+0x7c/0x90 fs/read_write.c:747 __invoke_syscall arch/arm64/kernel/syscall.c:35 [inline] invoke_syscall+0x98/0x244 arch/arm64/kernel/syscall.c:49 el0_svc_common+0xec/0x23c arch/arm64/kernel/syscall.c:121 do_el0_svc+0x4c/0x5c arch/arm64/kernel/syscall.c:140 el0_svc+0x64/0x260 arch/arm64/kernel/entry-common.c:736 el0t_64_sync_handler+0x48/0x148 arch/arm64/kernel/entry-common.c:755 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:594 irq event stamp: 69726 hardirqs last enabled at (69725): [] __raw_spin_unlock_irq include/linux/spinlock_api_smp.h:187 [inline] hardirqs last enabled at (69725): [] _raw_spin_unlock_irq+0x30/0x80 kernel/locking/spinlock.c:206 hardirqs last disabled at (69726): [] arch_suspend_disable_irqs+0x34/0x4c kernel/power/suspend.c:403 softirqs last enabled at (68262): [] softirq_handle_end kernel/softirq.c:468 [inline] softirqs last enabled at (68262): [] handle_softirqs+0xc28/0xd98 kernel/softirq.c:650 softirqs last disabled at (68257): [] __do_softirq+0x14/0x20 kernel/softirq.c:656 ---[ end trace 0000000000000000 ]--- ------------[ cut here ]------------ WARNING: kernel/context_tracking.c:165 at ct_kernel_enter+0x138/0x170 kernel/context_tracking.c:150, CPU#0: syz.1.501/5462 Modules linked in: CPU: 0 UID: 0 PID: 5462 Comm: syz.1.501 Tainted: G W syzkaller #0 PREEMPT Tainted: [W]=WARN Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 pstate: 600003c5 (nZCv DAIF -PAN -UAO -TCO -DIT -SSBS BTYPE=--) pc : ct_kernel_enter+0x138/0x170 kernel/context_tracking.c:150 lr : instrument_atomic_read include/linux/instrumented.h:82 [inline] lr : atomic_read include/linux/atomic/atomic-instrumented.h:32 [inline] lr : ct_rcu_watching include/linux/context_tracking_state.h:91 [inline] lr : ct_kernel_enter+0xc8/0x170 kernel/context_tracking.c:164 sp : ffff800095f775e0 x29: ffff800095f775e0 x28: dfff800000000000 x27: ffff800095f77660 x26: 00000000000000c0 x25: ffff700012beeecc x24: 0000000100000000 x23: ffff800088b0b6a0 x22: ffff800088abf998 x21: ffff0001ade38998 x20: ffff0001ade38998 x19: 0000000000000000 x18: 00000000ffffffff x17: 000000040044ffff x16: 041000f5b5503510 x15: 0000000000000000 x14: ffff0000db381d40 x13: 0000000000000001 x12: 0000000000000000 x11: 0000000000000000 x10: ffff600035bc7135 x9 : dfff800000000000 x8 : 0000000000000040 x7 : 0000000000000000 x6 : 000000000000003f x5 : 0000000000000040 x4 : 0000000000000000 x3 : ffff8000868e6a20 x2 : 0000000000000000 x1 : 0000000000000004 x0 : 0000000000000001 Call trace: ct_kernel_enter+0x138/0x170 kernel/context_tracking.c:150 (P) ct_idle_exit+0x24/0x48 kernel/context_tracking.c:317 ct_cpuidle_exit include/linux/cpuidle.h:144 [inline] cpu_suspend+0x2dc/0x474 arch/arm64/kernel/suspend.c:158 psci_system_suspend_enter+0x4c/0x80 drivers/firmware/psci/psci.c:544 suspend_enter kernel/power/suspend.c:468 [inline] suspend_devices_and_enter+0x88c/0xd0c kernel/power/suspend.c:533 enter_state kernel/power/suspend.c:618 [inline] pm_suspend+0x498/0x698 kernel/power/suspend.c:644 state_store+0x14c/0x1fc kernel/power/main.c:819 kobj_attr_store+0x6c/0x90 lib/kobject.c:840 sysfs_kf_write+0xe0/0x108 fs/sysfs/file.c:145 kernfs_fop_write_iter+0x260/0x3b8 fs/kernfs/file.c:345 new_sync_write fs/read_write.c:595 [inline] vfs_write+0x51c/0xa0c fs/read_write.c:687 ksys_write+0x12c/0x228 fs/read_write.c:739 __do_sys_write fs/read_write.c:750 [inline] __se_sys_write fs/read_write.c:747 [inline] __arm64_sys_write+0x7c/0x90 fs/read_write.c:747 __invoke_syscall arch/arm64/kernel/syscall.c:35 [inline] invoke_syscall+0x98/0x244 arch/arm64/kernel/syscall.c:49 el0_svc_common+0xec/0x23c arch/arm64/kernel/syscall.c:121 do_el0_svc+0x4c/0x5c arch/arm64/kernel/syscall.c:140 el0_svc+0x64/0x260 arch/arm64/kernel/entry-common.c:736 el0t_64_sync_handler+0x48/0x148 arch/arm64/kernel/entry-common.c:755 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:594 irq event stamp: 69728 hardirqs last enabled at (69727): [] psci_system_suspend_enter+0x4c/0x80 drivers/firmware/psci/psci.c:544 hardirqs last disabled at (69728): [] psci_system_suspend_enter+0x4c/0x80 drivers/firmware/psci/psci.c:544 softirqs last enabled at (68262): [] softirq_handle_end kernel/softirq.c:468 [inline] softirqs last enabled at (68262): [] handle_softirqs+0xc28/0xd98 kernel/softirq.c:650 softirqs last disabled at (68257): [] __do_softirq+0x14/0x20 kernel/softirq.c:656 ---[ end trace 0000000000000000 ]--- Enabling non-boot CPUs ... CPU1 is up OOM killer enabled. Restarting tasks: Starting Restarting tasks: Done random: crng reseeded on system resumption PM: suspend exit --- This report is generated by a bot. It may contain errors. See https://goo.gl/tpsmEJ for more information about syzbot. syzbot engineers can be reached at syzkaller@googlegroups.com. syzbot will keep track of this issue. See: https://goo.gl/tpsmEJ#status for how to communicate with syzbot. If the report is already addressed, let syzbot know by replying with: #syz fix: exact-commit-title If you want syzbot to run the reproducer, reply with: #syz test: git://repo/address.git branch-or-commit-hash If you attach or paste a git patch, syzbot will apply it before testing. 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