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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: Lfb4txZK7B25MJ2Yfg2qpXdgTq2mFpYKDt8e+H6GbtHNoZTn9GGTeeoTi6E+yjvdcb33b2/fGT/axCup00lWZA== X-MS-Exchange-Transport-CrossTenantHeadersStamped: BN9PR11MB5420 X-OriginatorOrg: intel.com Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hello, kernel test robot noticed "BUG:sleeping_function_called_from_invalid_context_at_kernel/locking/mutex.c" on: commit: f87686da5e324dd5fbc44ae39677d5111fdbef0f ("[PATCH v2] workqueue: let WORKER_CPU_INTENSIVE be included in watchdog") url: https://github.com/intel-lab-lkp/linux/commits/Tio-Zhang/workqueue-let-WORKER_CPU_INTENSIVE-be-included-in-watchdog/20230822-190755 base: https://git.kernel.org/cgit/linux/kernel/git/tj/wq.git for-next patch link: https://lore.kernel.org/all/20230822110609.GA3702@didi-ThinkCentre-M930t-N000/ patch subject: [PATCH v2] workqueue: let WORKER_CPU_INTENSIVE be included in watchdog in testcase: boot compiler: clang-16 test machine: qemu-system-i386 -enable-kvm -cpu SandyBridge -smp 2 -m 4G (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/202308241637.304413c4-oliver.sang@intel.com [ 34.238546][ C0] BUG: sleeping function called from invalid context at kernel/locking/mutex.c:580 [ 34.240594][ C0] in_atomic(): 1, irqs_disabled(): 0, non_block: 0, pid: 0, name: swapper/0 [ 34.242381][ C0] preempt_count: 101, expected: 0 [ 34.243435][ C0] 1 lock held by swapper/0/0: [ 34.244371][ C0] #0: 84fdbf20 ((&wq_watchdog_timer)){+.-.}-{0:0}, at: call_timer_fn+0x52/0x230 [ 34.245809][ C0] CPU: 0 PID: 0 Comm: swapper/0 Not tainted 6.5.0-rc1-00045-gf87686da5e32 #1 [ 34.247236][ C0] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.16.2-debian-1.16.2-1 04/01/2014 [ 34.247425][ C0] Call Trace: [ 34.251534][ C0] [ 34.251534][ C0] dump_stack_lvl+0x80/0xd0 [ 34.251534][ C0] dump_stack+0xd/0x14 [ 34.251534][ C0] __might_resched+0x245/0x260 [ 34.254546][ C0] __might_sleep+0x3a/0x60 [ 34.254546][ C0] __mutex_lock_common+0x53/0x1028 [ 34.254546][ C0] ? lock_acquire+0xce/0x260 [ 34.254546][ C0] mutex_lock_nested+0x21/0x30 [ 34.254546][ C0] ? wq_watchdog_timer_fn+0x41/0x4b0 [ 34.254546][ C0] ? pool_mayday_timeout+0x160/0x160 [ 34.254546][ C0] wq_watchdog_timer_fn+0x41/0x4b0 [ 34.254546][ C0] ? pool_mayday_timeout+0x160/0x160 [ 34.254546][ C0] call_timer_fn+0x9c/0x230 [ 34.254546][ C0] run_timer_softirq+0x2d8/0x380 [ 34.254546][ C0] __do_softirq+0x128/0x41f [ 34.254546][ C0] ? do_softirq_own_stack+0x22/0x30 [ 34.254546][ C0] ? __kprobes_text_end+0xc/0xc [ 34.254546][ C0] do_softirq_own_stack+0x22/0x30 [ 34.254546][ C0] [ 34.254546][ C0] ? sysvec_call_function_single+0x30/0x30 [ 34.254546][ C0] irq_exit_rcu+0x6a/0xa0 [ 34.254546][ C0] sysvec_apic_timer_interrupt+0x1f/0x34 [ 34.254546][ C0] handle_exception+0x133/0x133 [ 34.254546][ C0] EIP: intel_idle_hlt+0x10/0x18 [ 34.254546][ C0] Code: 64 8b 3d 40 41 ed 83 f0 80 4f 02 20 f7 07 08 00 00 00 75 b1 e9 67 ff ff ff 90 55 89 e5 89 c8 eb 07 0f 00 2d f4 24 d7 82 fb f4 5d 31 c9 c3 90 90 90 55 89 e5 89 c8 fb eb 07 0f 00 2d f4 24 d7 [ 34.254546][ C0] EAX: 00000002 EBX: 00000002 ECX: 00000002 EDX: 83b1c114 [ 34.254546][ C0] ESI: e96152b4 EDI: 83b1c1d8 EBP: 83709ee4 ESP: 83709ee4 [ 34.254546][ C0] DS: 007b ES: 007b FS: 00d8 GS: 0000 SS: 0068 EFLAGS: 00200246 [ 34.254546][ C0] ? sysvec_call_function_single+0x30/0x30 [ 34.254546][ C0] ? intel_idle_hlt+0x10/0x18 [ 34.254546][ C0] cpuidle_enter_state+0xfa/0x48f [ 34.254546][ C0] ? ktime_get+0x89/0x130 [ 34.254546][ C0] cpuidle_enter+0x2f/0x50 [ 34.254546][ C0] do_idle+0x1ab/0x250 [ 34.254546][ C0] cpu_startup_entry+0x25/0x30 [ 34.254546][ C0] rest_init+0x185/0x190 [ 34.254546][ C0] arch_call_rest_init+0xd/0x10 [ 34.254546][ C0] start_kernel+0x331/0x3a0 [ 34.254546][ C0] i386_start_kernel+0x21e/0x228 [ 34.254546][ C0] startup_32_smp+0x151/0x154 [ 34.301725][ C0] [ 34.302134][ C0] ============================= [ 34.303085][ C0] [ BUG: Invalid wait context ] [ 34.304063][ C0] 6.5.0-rc1-00045-gf87686da5e32 #1 Tainted: G W [ 34.305573][ C0] ----------------------------- [ 34.305718][ C0] swapper/0/0 is trying to lock: [ 34.305718][ C0] 837409e4 (wq_pool_mutex){+.+.}-{3:3}, at: wq_watchdog_timer_fn+0x41/0x4b0 [ 34.305718][ C0] other info that might help us debug this: [ 34.305718][ C0] context-{2:2} [ 34.305718][ C0] 1 lock held by swapper/0/0: [ 34.305718][ C0] #0: 84fdbf20 ((&wq_watchdog_timer)){+.-.}-{0:0}, at: call_timer_fn+0x52/0x230 [ 34.305718][ C0] stack backtrace: [ 34.305718][ C0] CPU: 0 PID: 0 Comm: swapper/0 Tainted: G W 6.5.0-rc1-00045-gf87686da5e32 #1 [ 34.305718][ C0] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.16.2-debian-1.16.2-1 04/01/2014 [ 34.305718][ C0] Call Trace: [ 34.305718][ C0] [ 34.305718][ C0] dump_stack_lvl+0x80/0xd0 [ 34.305718][ C0] dump_stack+0xd/0x14 [ 34.305718][ C0] __lock_acquire+0xd5e/0x2c80 [ 34.305718][ C0] ? irqtime_account_irq+0x66/0x90 [ 34.305718][ C0] ? irqentry_exit+0x83/0x8c [ 34.305718][ C0] ? sysvec_call_function_single+0x30/0x30 [ 34.305718][ C0] ? sysvec_apic_timer_interrupt+0x29/0x34 [ 34.305718][ C0] ? handle_exception+0x133/0x133 [ 34.305718][ C0] lock_acquire+0xce/0x260 [ 34.305718][ C0] ? wq_watchdog_timer_fn+0x41/0x4b0 [ 34.305718][ C0] ? dump_stack_lvl+0xaf/0xd0 [ 34.305718][ C0] ? dump_stack+0xd/0x14 [ 34.305718][ C0] ? __might_resched+0x251/0x260 [ 34.305718][ C0] __mutex_lock_common+0xa8/0x1028 [ 34.305718][ C0] ? wq_watchdog_timer_fn+0x41/0x4b0 [ 34.305718][ C0] ? lock_acquire+0xce/0x260 [ 34.305718][ C0] mutex_lock_nested+0x21/0x30 [ 34.305718][ C0] ? wq_watchdog_timer_fn+0x41/0x4b0 [ 34.305718][ C0] ? pool_mayday_timeout+0x160/0x160 [ 34.305718][ C0] wq_watchdog_timer_fn+0x41/0x4b0 [ 34.305718][ C0] ? pool_mayday_timeout+0x160/0x160 [ 34.305718][ C0] call_timer_fn+0x9c/0x230 [ 34.305718][ C0] run_timer_softirq+0x2d8/0x380 [ 34.305718][ C0] __do_softirq+0x128/0x41f [ 34.305718][ C0] ? do_softirq_own_stack+0x22/0x30 [ 34.305718][ C0] ? __kprobes_text_end+0xc/0xc [ 34.305718][ C0] do_softirq_own_stack+0x22/0x30 [ 34.305718][ C0] [ 34.305718][ C0] ? sysvec_call_function_single+0x30/0x30 [ 34.305718][ C0] irq_exit_rcu+0x6a/0xa0 [ 34.305718][ C0] sysvec_apic_timer_interrupt+0x1f/0x34 [ 34.305718][ C0] handle_exception+0x133/0x133 [ 34.305718][ C0] EIP: intel_idle_hlt+0x10/0x18 [ 34.305718][ C0] Code: 64 8b 3d 40 41 ed 83 f0 80 4f 02 20 f7 07 08 00 00 00 75 b1 e9 67 ff ff ff 90 55 89 e5 89 c8 eb 07 0f 00 2d f4 24 d7 82 fb f4 5d 31 c9 c3 90 90 90 55 89 e5 89 c8 fb eb 07 0f 00 2d f4 24 d7 [ 34.305718][ C0] EAX: 00000002 EBX: 00000002 ECX: 00000002 EDX: 83b1c114 [ 34.305718][ C0] ESI: e96152b4 EDI: 83b1c1d8 EBP: 83709ee4 ESP: 83709ee4 [ 34.305718][ C0] DS: 007b ES: 007b FS: 00d8 GS: 0000 SS: 0068 EFLAGS: 00200246 [ 34.305718][ C0] ? sysvec_call_function_single+0x30/0x30 [ 34.305718][ C0] ? intel_idle_hlt+0x10/0x18 [ 34.305718][ C0] cpuidle_enter_state+0xfa/0x48f [ 34.305718][ C0] ? ktime_get+0x89/0x130 [ 34.305718][ C0] cpuidle_enter+0x2f/0x50 [ 34.305718][ C0] do_idle+0x1ab/0x250 [ 34.305718][ C0] cpu_startup_entry+0x25/0x30 [ 34.305718][ C0] rest_init+0x185/0x190 [ 34.305718][ C0] arch_call_rest_init+0xd/0x10 [ 34.305718][ C0] start_kernel+0x331/0x3a0 [ 34.305718][ C0] i386_start_kernel+0x21e/0x228 [ 34.305718][ C0] startup_32_smp+0x151/0x154 The kernel config and materials to reproduce are available at: https://download.01.org/0day-ci/archive/20230824/202308241637.304413c4-oliver.sang@intel.com -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki