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charset="us-ascii" Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 X-MS-Exchange-CrossTenant-AuthAs: Internal X-MS-Exchange-CrossTenant-AuthSource: PH0PR11MB5880.namprd11.prod.outlook.com X-MS-Exchange-CrossTenant-Network-Message-Id: 4f7ee25d-047a-432e-1805-08db0a4969a7 X-MS-Exchange-CrossTenant-originalarrivaltime: 09 Feb 2023 02:57:42.4349 (UTC) X-MS-Exchange-CrossTenant-fromentityheader: Hosted X-MS-Exchange-CrossTenant-id: 46c98d88-e344-4ed4-8496-4ed7712e255d X-MS-Exchange-CrossTenant-mailboxtype: HOSTED X-MS-Exchange-CrossTenant-userprincipalname: PNZ0TBmGeWPrthDgp2F7zn6wfpCP9tevINBYXonageviHA2U4GC/LQKA2jKEdb/OxWKW/T4rg6ZeOpfvWa2DQw== X-MS-Exchange-Transport-CrossTenantHeadersStamped: PH7PR11MB6796 X-OriginatorOrg: intel.com Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Test based on the following branches: https://git.kernel.org/pub/scm/linux/kernel/git/paulmck/linux-rcu.git bran= ch dev, arch X86_64=20 runqemu kvm slirp nographic qemuparams=3D"-m 1024 -smp 4" bootparams=3D"nok= aslr console=3DttyS0 rcutorture.torture_type=3Drcu rcutorture.shuffle_inter= val=3D0 isolcpus=3D0,1 rcu_nocbs=3D0,1 nohz_full=3D0,1 rcutree.dump_tree=3D= 1 rcutorture.onoff_holdoff=3D30 rcutorture.onoff_interval=3D10" -d [ 39.392925] BUG: unable to handle page fault for address: ffffffff84d050= 00 [ 39.393244] #PF: supervisor read access in kernel mode [ 39.393480] #PF: error_code(0x0000) - not-present page [ 39.393715] PGD 3e19067 P4D 3e19067 PUD 3e1a063 PMD 800ffffffb3ff062 [ 39.394014] Oops: 0000 [#1] PREEMPT SMP KASAN PTI [ 39.394231] CPU: 0 PID: 16 Comm: rcu_preempt Not tainted 6.2.0-rc1-yocto= -standard+ #635 [ 39.394590] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS rel= -1.16.0-0-gd239552ce722-prebuilt.qemu.o4 [ 39.395085] RIP: 0010:do_raw_spin_trylock+0x70/0x120 [ 39.395320] Code: 81 c7 00 f1 f1 f1 f1 c7 40 04 04 f3 f3 f3 65 48 8b 04 = 25 28 00 00 00 48 89 45 e0 31 c0 e8 c8 0 [ 39.396143] RSP: 0018:ffff8880072d7b30 EFLAGS: 00010046 [ 39.396381] RAX: 0000000000000000 RBX: ffffffff84d05000 RCX: dffffc00000= 00000 [ 39.396703] RDX: 0000000000000003 RSI: 0000000000000004 RDI: ffffffff84d= 05000 [ 39.397027] RBP: ffff8880072d7ba8 R08: ffffffff811d74a0 R09: fffffbfff09= a0a01 [ 39.397346] R10: ffffffff84d05003 R11: fffffbfff09a0a00 R12: 1ffff11000e= 5af66 [ 39.397669] R13: ffffffff84d05018 R14: ffffffff84d05000 R15: ffff8880072= d7cd8 [ 39.397990] FS: 0000000000000000(0000) GS:ffff888035400000(0000) knlGS:= 0000000000000000 [ 39.398353] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 39.398615] CR2: ffffffff84d05000 CR3: 000000000a22c000 CR4: 00000000001= 506f0 [ 39.398936] Call Trace: [ 39.399053] [ 39.399156] ? __pfx_do_raw_spin_trylock+0x10/0x10 [ 39.399379] ? trace_preempt_off+0x2a/0x110 [ 39.399576] _raw_spin_lock+0x41/0x80 [ 39.399751] ? schedule_timeout+0x242/0x580 [ 39.399945] schedule_timeout+0x242/0x580 [ 39.400133] ? __pfx_schedule_timeout+0x10/0x10 [ 39.400346] ? __pfx_do_raw_spin_trylock+0x10/0x10 [ 39.400567] ? __pfx_process_timeout+0x10/0x10 [ 39.400776] ? _raw_spin_unlock_irqrestore+0x46/0x80 [ 39.401006] ? prepare_to_swait_event+0xb8/0x210 [ 39.401221] rcu_gp_fqs_loop+0x60b/0xd50 [ 39.401405] ? rcu_gp_init+0x89c/0x1250 [ 39.401587] ? __pfx_rcu_gp_fqs_loop+0x10/0x10 [ 39.401793] ? _raw_spin_unlock_irqrestore+0x46/0x80 [ 39.402022] rcu_gp_kthread+0x2b7/0x620 [ 39.402201] ? __pfx_do_raw_spin_trylock+0x10/0x10 [ 39.402421] ? __pfx_rcu_gp_kthread+0x10/0x10 [ 39.402625] ? __kasan_check_read+0x11/0x20 [ 39.402818] ? __kthread_parkme+0xe8/0x110 [ 39.403010] ? __pfx_rcu_gp_kthread+0x10/0x10 [ 39.403213] kthread+0x192/0x1d0 [ 39.403366] ? __pfx_kthread+0x10/0x10 [ 39.403541] ret_from_fork+0x2c/0x50 [ 39.403712] [ 39.403818] Modules linked in: [ 39.403972] CR2: ffffffff84d05000 [ 39.404128] ---[ end trace 0000000000000000 ]--- [ 39.404340] RIP: 0010:do_raw_spin_trylock+0x70/0x120 [ 39.404569] Code: 81 c7 00 f1 f1 f1 f1 c7 40 04 04 f3 f3 f3 65 48 8b 04 = 25 28 00 00 00 48 89 45 e0 31 c0 e8 c8 0 [ 39.405400] RSP: 0018:ffff8880072d7b30 EFLAGS: 00010046 [ 39.405639] RAX: 0000000000000000 RBX: ffffffff84d05000 RCX: dffffc00000= 00000 [ 39.405959] RDX: 0000000000000003 RSI: 0000000000000004 RDI: ffffffff84d= 05000 [ 39.406281] RBP: ffff8880072d7ba8 R08: ffffffff811d74a0 R09: fffffbfff09= a0a01 [ 39.406602] R10: ffffffff84d05003 R11: fffffbfff09a0a00 R12: 1ffff11000e= 5af66 [ 39.406922] R13: ffffffff84d05018 R14: ffffffff84d05000 R15: ffff8880072= d7cd8 [ 39.407245] FS: 0000000000000000(0000) GS:ffff888035400000(0000) knlGS:= 0000000000000000 [ 39.407607] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 39.407871] CR2: ffffffff84d05000 CR3: 000000000a22c000 CR4: 00000000001= 506f0 [ 39.408195] Kernel panic - not syncing: Fatal exception [ 39.408450] Kernel Offset: disabled [ 39.408615] ---[ end Kernel panic - not syncing: Fatal exception ]--- After remove isolcpus=3D0,1 and nohz_full=3D0,1, there is no Oops. Thanks Zqiang