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McKenney" , rcu@vger.kernel.org, linux-kernel@vger.kernel.org, Frederic Weisbecker , Neeraj Upadhyay , Joel Fernandes , Josh Triplett , Boqun Feng , Uladzislau Rezki , Steven Rostedt , Mathieu Desnoyers , Lai Jiangshan , Zqiang , yi1.lai@intel.com Subject: Re: [PATCH] rcu-tasks: Track barrier callbacks in debugobjects Message-ID: <202611102000.66498f89-lkp@intel.com> X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Post: List-Help: List-Subscribe: List-Unsubscribe: List-Owner: Precedence: list MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20261104153046.965890-1-joelagnelf@nvidia.com> Hello, kernel test robot noticed "WARNING:at_lib/debugobjects.c:#debug_print_object" on: commit: 658b1b4ca701213b64469ec43cd8f10adaf395f2 ("[PATCH] rcu-tasks: Track barrier callbacks in debugobjects") url: https://github.com/intel-lab-lkp/linux/commits/Joel-Fernandes/rcu-tasks-Track-barrier-callbacks-in-debugobjects/20261104-103045 base: https://git.kernel.org/cgit/linux/kernel/git/rcu/linux.git rcu/dev patch link: https://lore.kernel.org/all/20261104153046.965890-1-joelagnelf@nvidia.com/ patch subject: [PATCH] rcu-tasks: Track barrier callbacks in debugobjects in testcase: rcutorture with following parameters: runtime: 300s test: default torture_type: tasks config: x86_64-randconfig-072-20260623 compiler: gcc-14 test machine: qemu-system-x86_64 -enable-kvm -cpu Cascadelake-Server-noTSX,enforce -smp 4 -m 16G (please refer to attached dmesg/kmsg for entire log/backtrace) If you fix the issue in a separate patch/commit (i.e. not just a new version of the same patch/commit), kindly add following tags | Reported-by: kernel test robot | Closes: https://lore.kernel.org/oe-lkp/202611102000.66498f89-lkp@intel.com [ 325.412340][ T1259] ------------[ cut here ]------------ [ 325.413965][ T1259] ODEBUG: activate active (active state 1) object: ffffffff8a7b1f08 object type: rcu_head hint: 0x0 [ 325.416551][ T1259] WARNING: lib/debugobjects.c:629 at debug_print_object+0x191/0x1d0, CPU#0: rcu_torture_fak/1259 [ 325.419281][ T1259] Modules linked in: rcutorture torture [ 325.420580][ T1259] CPU: 0 UID: 0 PID: 1259 Comm: rcu_torture_fak Tainted: G T 7.0.0-rc6-00019-g658b1b4ca701 #1 PREEMPT [ 325.423791][ T1259] Tainted: [T]=RANDSTRUCT [ 325.424756][ T1259] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 [ 325.427494][ T1259] RIP: 0010:debug_print_object+0x1a6/0x1d0 [ 325.428858][ T1259] Code: c1 ea 03 80 3c 02 00 74 05 e8 76 71 25 ff 48 8d 3d 0f 1c f3 0a 41 54 48 8b 14 dd c0 75 72 87 4d 89 f9 4d 89 f0 89 e9 4c 89 ee <67> 48 0f b9 3a 58 ff 05 32 2a ef 0a 5b 5d 41 5c 41 5d 41 5e 41 5f [ 325.433880][ T1259] RSP: 0018:ffffc90000357c70 EFLAGS: 00010246 [ 325.435364][ T1259] RAX: dffffc0000000000 RBX: 0000000000000003 RCX: 0000000000000001 [ 325.437272][ T1259] RDX: ffffffff87727500 RSI: ffffffff87726e60 RDI: ffffffff8d6cac90 [ 325.439305][ T1259] RBP: 0000000000000001 R08: ffffffff8a7b1f08 R09: ffffffff872da660 [ 325.441227][ T1259] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 [ 325.443291][ T1259] R13: ffffffff87726e60 R14: ffffffff8a7b1f08 R15: ffffffff872da660 [ 325.445186][ T1259] FS: 0000000000000000(0000) GS:0000000000000000(0000) knlGS:0000000000000000 [ 325.447423][ T1259] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 325.449011][ T1259] CR2: 000000000805b740 CR3: 0000000154e57001 CR4: 00000000007706b0 [ 325.451076][ T1259] PKRU: 55555554 [ 325.451919][ T1259] Call Trace: [ 325.452654][ T1259] [ 325.453464][ T1259] debug_object_activate+0x207/0x2a0 [ 325.454826][ T1259] ? debug_object_init_on_stack+0x20/0x20 [ 325.456217][ T1259] ? find_held_lock+0x2b/0x80 [ 325.457536][ T1259] ? lockdep_init_map_type+0xb1/0x200 [ 325.462417][ T1259] ? lockdep_init_map_type+0xb1/0x200 [ 325.464677][ T1259] ? __init_swait_queue_head+0xd3/0x140 [ 325.471162][ T1259] rcu_barrier_tasks_generic+0x10d/0x2a0 [ 325.474128][ T1259] rcu_torture_fakewriter+0x157/0x870 [rcutorture] [ 325.477019][ T1259] ? rcu_read_delay+0x250/0x250 [rcutorture] [ 325.479711][ T1259] ? lockdep_hardirqs_on+0xd0/0x100 [ 325.481709][ T1259] ? _raw_spin_unlock_irqrestore+0x4c/0xa0 [ 325.483416][ T1259] ? __kthread_parkme+0xfe/0x200 [ 325.484751][ T1259] ? rcu_read_delay+0x250/0x250 [rcutorture] [ 325.486553][ T1259] kthread+0x3cd/0x3e0 [ 325.487554][ T1259] ? kthread_affine_node+0x150/0x150 [ 325.488909][ T1259] ret_from_fork+0x7a/0x7c0 [ 325.490231][ T1259] ? arch_exit_to_user_mode_prepare+0x150/0x150 [ 325.491925][ T1259] ? switch_fpu+0x14/0x1b0 [ 325.493054][ T1259] ? __switch_to+0x573/0xa70 [ 325.494357][ T1259] ? kthread_affine_node+0x150/0x150 [ 325.495663][ T1259] ret_from_fork_asm+0x11/0x20 [ 325.496861][ T1259] [ 325.497866][ T1259] irq event stamp: 1019 [ 325.499064][ T1259] hardirqs last enabled at (1033): [] __up_console_sem+0x40/0x60 [ 325.501497][ T1259] hardirqs last disabled at (1048): [] __up_console_sem+0x20/0x60 [ 325.503957][ T1259] softirqs last enabled at (1074): [] handle_softirqs+0x61f/0x6f0 [ 325.506531][ T1259] softirqs last disabled at (1095): [] __irq_exit_rcu+0xa8/0x1e0 [ 325.508825][ T1259] ---[ end trace 0000000000000000 ]--- [ 325.649375][ T1259] ------------[ cut here ]------------ The kernel config and materials to reproduce are available at: https://download.01.org/0day-ci/archive/20261110/202611102000.66498f89-lkp@intel.com -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki