From: kernel test robot <oliver.sang@intel.com>
To: Rosen Penev <rosenp@gmail.com>
Cc: <oe-lkp@lists.linux.dev>, <lkp@intel.com>,
<dmaengine@vger.kernel.org>, Vinod Koul <vkoul@kernel.org>,
Frank Li <Frank.Li@kernel.org>, Kees Cook <kees@kernel.org>,
"Gustavo A. R. Silva" <gustavoars@kernel.org>,
<oliver.sang@intel.com>
Subject: Re: [PATCH] dmaengine: idma64: use kzalloc_flex
Date: Fri, 20 Mar 2026 15:51:43 +0800 [thread overview]
Message-ID: <202603200800.38a86c8a-lkp@intel.com> (raw)
In-Reply-To: <20260317003730.72379-1-rosenp@gmail.com>
Hello,
kernel test robot noticed "WARNING:HARDIRQ-safe->HARDIRQ-unsafe_lock_order_detected" on:
commit: 9aaf187d4b233d22a895a594836a02c32c413937 ("[PATCH] dmaengine: idma64: use kzalloc_flex")
url: https://github.com/intel-lab-lkp/linux/commits/Rosen-Penev/dmaengine-idma64-use-kzalloc_flex/20260317-084750
base: https://git.kernel.org/cgit/linux/kernel/git/vkoul/dmaengine.git next
patch link: https://lore.kernel.org/all/20260317003730.72379-1-rosenp@gmail.com/
patch subject: [PATCH] dmaengine: idma64: use kzalloc_flex
in testcase: perf-event-tests
version: perf-event-tests-x86_64-54251c2-1_20251210
with following parameters:
paranoid: not_paranoid_at_all
config: x86_64-rhel-9.4-bpf
compiler: gcc-14
test machine: 16 threads Intel(R) Core(TM) i7-13620H (Raptor Lake) with 32G memory
(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 <oliver.sang@intel.com>
| Closes: https://lore.kernel.org/oe-lkp/202603200800.38a86c8a-lkp@intel.com
kern :warn : [ 92.812882] [ T125] WARNING: HARDIRQ-safe -> HARDIRQ-unsafe lock order detected
kern :warn : [ 92.812886] [ T125] 7.0.0-rc1-00048-g9aaf187d4b23 #1 Tainted: G S
kern :warn : [ 92.812888] [ T125] -----------------------------------------------------
kern :warn : [ 92.812890] [ T125] kworker/u64:13/125 [HC0[0]:SC0[0]:HE0:SE1] is trying to acquire:
kern :info : [ 92.820021] [ T301] scsi host1: ahci
kern :warn : [ 92.824348] [ T125] ffffffff85238340 (fs_reclaim){+.+.}-{0:0}, at: __kmalloc_noprof (include/linux/sched/mm.h:318 mm/slub.c:4452 mm/slub.c:4807 mm/slub.c:5218 mm/slub.c:5231)
kern :info : [ 92.832922] [ T301] ata1: SATA max UDMA/133 abar m2048@0x50a02000 port 0x50a02100 irq 157 lpm-pol 0
kern :warn : [ 92.840680] [ T125]
and this task is already holding:
kern :warn : [ 92.840681] [ T125] ffffffff87aa2698 (&port_lock_key){-.-.}-{3:3}, at: serial_port_runtime_resume (include/linux/serial_core.h:640 include/linux/serial_core.h:674 include/linux/serial_core.h:718 drivers/tty/serial/serial_port.c:42)
kern :info : [ 92.847517] [ T301] ata2: SATA max UDMA/133 abar m2048@0x50a02000 port 0x50a02180 irq 157 lpm-pol 0
kern :warn : [ 92.856658] [ T125] which would create a new lock dependency:
kern :warn : [ 92.856660] [ T125] (&port_lock_key){-.-.}-{3:3} -> (fs_reclaim){+.+.}-{0:0}
kern :warn : [ 92.921503] [ T125]
but this new dependency connects a HARDIRQ-irq-safe lock:
kern :warn : [ 92.921505] [ T125] (&port_lock_key){-.-.}-{3:3}
kern :warn : [ 92.921509] [ T125]
... which became HARDIRQ-irq-safe at:
kern :warn : [ 92.921510] [ T125] __lock_acquire (kernel/locking/lockdep.c:5191 (discriminator 1))
kern :warn : [ 92.959014] [ T125] lock_acquire (include/trace/events/lock.h:24 (discriminator 15) include/trace/events/lock.h:24 (discriminator 15) kernel/locking/lockdep.c:5831 (discriminator 15))
kern :warn : [ 92.959019] [ T125] _raw_spin_lock_irqsave (include/linux/spinlock_api_smp.h:133 kernel/locking/spinlock.c:162)
kern :warn : [ 92.970359] [ T125] serial8250_handle_irq (include/linux/serial_core.h:640 include/linux/serial_core.h:674 include/linux/serial_core.h:718 drivers/tty/serial/8250/8250_port.c:1798)
kern :warn : [ 92.976110] [ T125] serial8250_default_handle_irq (drivers/tty/serial/8250/8250_port.c:1846)
kern :warn : [ 92.982547] [ T125] serial8250_interrupt (drivers/tty/serial/8250/8250_core.c:86 (discriminator 1))
kern :warn : [ 92.988104] [ T125] __handle_irq_event_percpu (kernel/irq/handle.c:209)
kern :warn : [ 92.994068] [ T125] handle_irq_event (kernel/irq/handle.c:248 kernel/irq/handle.c:263)
kern :warn : [ 92.999068] [ T125] handle_edge_irq (kernel/irq/chip.c:857)
kern :warn : [ 93.004157] [ T125] __common_interrupt (include/asm-generic/irq_regs.h:29 (discriminator 5) arch/x86/kernel/irq.c:336 (discriminator 5))
kern :warn : [ 93.009323] [ T125] common_interrupt (arch/x86/kernel/irq.c:326 (discriminator 35))
kern :warn : [ 93.014316] [ T125] asm_common_interrupt (arch/x86/include/asm/idtentry.h:569)
kern :warn : [ 93.019650] [ T125] finish_task_switch+0x10b/0x3b0
kern :warn : [ 93.025596] [ T125] __schedule (kernel/sched/core.c:5298)
kern :warn : [ 93.030226] [ T125] schedule (arch/x86/include/asm/preempt.h:27 kernel/sched/core.c:5780 kernel/sched/core.c:5800 kernel/sched/core.c:6990 kernel/sched/core.c:7004)
kern :warn : [ 93.034596] [ T125] worker_thread (kernel/workqueue.c:3392)
kern :warn : [ 93.039471] [ T125] kthread (kernel/kthread.c:467)
kern :warn : [ 93.043818] [ T125] ret_from_fork (arch/x86/kernel/process.c:164)
kern :warn : [ 93.048676] [ T125] ret_from_fork_asm (arch/x86/entry/entry_64.S:255)
kern :warn : [ 93.053710] [ T125]
to a HARDIRQ-irq-unsafe lock:
kern :warn : [ 93.061189] [ T125] (fs_reclaim){+.+.}-{0:0}
kern :warn : [ 93.061193] [ T125]
... which became HARDIRQ-irq-unsafe at:
kern :warn : [ 93.074129] [ T125] ...
kern :warn : [ 93.074131] [ T125] __lock_acquire (kernel/locking/lockdep.c:5191 (discriminator 1))
kern :warn : [ 93.081760] [ T125] lock_acquire (include/trace/events/lock.h:24 (discriminator 15) include/trace/events/lock.h:24 (discriminator 15) kernel/locking/lockdep.c:5831 (discriminator 15))
kern :warn : [ 93.086999] [ T125] fs_reclaim_acquire (mm/page_alloc.c:4349 mm/page_alloc.c:4362)
kern :warn : [ 93.092056] [ T125] mem_cgroup_alloc (include/linux/sched/mm.h:318 include/linux/xarray.h:876 mm/memcontrol.c:3758)
kern :warn : [ 93.097030] [ T125] mem_cgroup_css_alloc (mm/memcontrol.c:3830)
kern :warn : [ 93.102350] [ T125] cgroup_init_subsys (kernel/cgroup/cgroup.c:6257)
kern :warn : [ 93.107583] [ T125] cgroup_init (include/linux/list.h:191 kernel/cgroup/cgroup.c:6387)
kern :warn : [ 93.112204] [ T125] start_kernel (init/main.c:1202)
kern :warn : [ 93.116907] [ T125] __pfx_clear_bss (arch/x86/kernel/head64.c:310)
kern :warn : [ 93.121614] [ T125] x86_64_start_kernel (??:?)
kern :warn : [ 93.126754] [ T125] common_startup_64 (arch/x86/kernel/head_64.S:419)
kern :warn : [ 93.131895] [ T125]
other info that might help us debug this:
kern :warn : [ 93.142675] [ T125] Possible interrupt unsafe locking scenario:
kern :warn : [ 93.151346] [ T125] CPU0 CPU1
kern :warn : [ 93.156839] [ T125] ---- ----
kern :warn : [ 93.162328] [ T125] lock(fs_reclaim);
kern :info : [ 93.166307] [ T391] ata1: SATA link down (SStatus 4 SControl 300)
kern :warn : [ 93.166424] [ T125] local_irq_disable();
kern :warn : [ 93.166425] [ T125] lock(&port_lock_key);
kern :info : [ 93.177705] [ T393] ata2: SATA link down (SStatus 4 SControl 300)
kern :warn : [ 93.179181] [ T125] lock(fs_reclaim);
kern :warn : [ 93.179183] [ T125] <Interrupt>
kern :warn : [ 93.179184] [ T125] lock(&port_lock_key);
kern :warn : [ 93.179186] [ T125]
*** DEADLOCK ***
kern :warn : [ 93.179186] [ T125] 3 locks held by kworker/u64:13/125:
kern :warn : [ 93.222088] [ T125] #0: ffff8881016d2948 ((wq_completion)pm){+.+.}-{0:0}, at: process_one_work (kernel/workqueue.c:3250)
kern :warn : [ 93.232332] [ T125] #1: ffff888101b3fd40 ((work_completion)(&dev->power.work)){+.+.}-{0:0}, at: process_one_work (kernel/workqueue.c:3251)
kern :warn : [ 93.244208] [ T125] #2: ffffffff87aa2698 (&port_lock_key){-.-.}-{3:3}, at: serial_port_runtime_resume (include/linux/serial_core.h:640 include/linux/serial_core.h:674 include/linux/serial_core.h:718 drivers/tty/serial/serial_port.c:42)
kern :warn : [ 93.255081] [ T125]
the dependencies between HARDIRQ-irq-safe lock and the holding lock:
kern :warn : [ 93.265967] [ T125] -> (&port_lock_key){-.-.}-{3:3} {
kern :warn : [ 93.271368] [ T125] IN-HARDIRQ-W at:
kern :warn : [ 93.275551] [ T125] __lock_acquire (kernel/locking/lockdep.c:5191 (discriminator 1))
kern :warn : [ 93.282082] [ T125] lock_acquire (include/trace/events/lock.h:24 (discriminator 15) include/trace/events/lock.h:24 (discriminator 15) kernel/locking/lockdep.c:5831 (discriminator 15))
kern :warn : [ 93.288963] [ T125] _raw_spin_lock_irqsave (include/linux/spinlock_api_smp.h:133 kernel/locking/spinlock.c:162)
kern :warn : [ 93.296016] [ T125] serial8250_handle_irq (include/linux/serial_core.h:640 include/linux/serial_core.h:674 include/linux/serial_core.h:718 drivers/tty/serial/8250/8250_port.c:1798)
kern :warn : [ 93.303060] [ T125] serial8250_default_handle_irq (drivers/tty/serial/8250/8250_port.c:1846)
kern :warn : [ 93.310805] [ T125] serial8250_interrupt (drivers/tty/serial/8250/8250_core.c:86 (discriminator 1))
kern :warn : [ 93.317680] [ T125] __handle_irq_event_percpu (kernel/irq/handle.c:209)
kern :warn : [ 93.325157] [ T125] handle_irq_event (kernel/irq/handle.c:248 kernel/irq/handle.c:263)
kern :warn : [ 93.331689] [ T125] handle_edge_irq (kernel/irq/chip.c:857)
kern :warn : [ 93.338301] [ T125] __common_interrupt (include/asm-generic/irq_regs.h:29 (discriminator 5) arch/x86/kernel/irq.c:336 (discriminator 5))
kern :warn : [ 93.345005] [ T125] common_interrupt (arch/x86/kernel/irq.c:326 (discriminator 35))
kern :warn : [ 93.351528] [ T125] asm_common_interrupt (arch/x86/include/asm/idtentry.h:569)
kern :warn : [ 93.358390] [ T125] finish_task_switch+0x10b/0x3b0
kern :warn : [ 93.365862] [ T125] __schedule (kernel/sched/core.c:5298)
kern :warn : [ 93.372039] [ T125] schedule (arch/x86/include/asm/preempt.h:27 kernel/sched/core.c:5780 kernel/sched/core.c:5800 kernel/sched/core.c:6990 kernel/sched/core.c:7004)
kern :warn : [ 93.377948] [ T125] worker_thread (kernel/workqueue.c:3392)
kern :warn : [ 93.384375] [ T125] kthread (kernel/kthread.c:467)
kern :warn : [ 93.390278] [ T125] ret_from_fork (arch/x86/kernel/process.c:164)
kern :warn : [ 93.396705] [ T125] ret_from_fork_asm (arch/x86/entry/entry_64.S:255)
kern :warn : [ 93.403303] [ T125] IN-SOFTIRQ-W at:
kern :warn : [ 93.407480] [ T125] __lock_acquire (kernel/locking/lockdep.c:5191 (discriminator 1))
kern :warn : [ 93.413998] [ T125] lock_acquire (include/trace/events/lock.h:24 (discriminator 15) include/trace/events/lock.h:24 (discriminator 15) kernel/locking/lockdep.c:5831 (discriminator 15))
kern :warn : [ 93.420866] [ T125] _raw_spin_lock_irqsave (include/linux/spinlock_api_smp.h:133 kernel/locking/spinlock.c:162)
kern :warn : [ 93.427896] [ T125] serial8250_handle_irq (include/linux/serial_core.h:640 include/linux/serial_core.h:674 include/linux/serial_core.h:718 drivers/tty/serial/8250/8250_port.c:1798)
kern :warn : [ 93.434913] [ T125] serial8250_default_handle_irq (drivers/tty/serial/8250/8250_port.c:1846)
kern :warn : [ 93.442616] [ T125] serial8250_interrupt (drivers/tty/serial/8250/8250_core.c:86 (discriminator 1))
kern :warn : [ 93.449446] [ T125] __handle_irq_event_percpu (kernel/irq/handle.c:209)
kern :warn : [ 93.456868] [ T125] handle_irq_event (kernel/irq/handle.c:248 kernel/irq/handle.c:263)
kern :warn : [ 93.463342] [ T125] handle_edge_irq (kernel/irq/chip.c:857)
kern :warn : [ 93.469897] [ T125] __common_interrupt (include/asm-generic/irq_regs.h:29 (discriminator 5) arch/x86/kernel/irq.c:336 (discriminator 5))
kern :warn : [ 93.476528] [ T125] common_interrupt (arch/x86/kernel/irq.c:326 (discriminator 2))
kern :warn : [ 93.482981] [ T125] asm_common_interrupt (arch/x86/include/asm/idtentry.h:569)
kern :warn : [ 93.489779] [ T125] sched_balance_update_blocked_averages (kernel/sched/fair.c:9949)
kern :warn : [ 93.498233] [ T125] sched_balance_softirq (kernel/sched/fair.c:13021)
kern :warn : [ 93.505116] [ T125] handle_softirqs (arch/x86/include/asm/jump_label.h:37 include/trace/events/irq.h:142 kernel/softirq.c:623)
kern :warn : [ 93.511663] [ T125] __irq_exit_rcu (kernel/softirq.c:657 kernel/softirq.c:496 kernel/softirq.c:723)
kern :warn : [ 93.518123] [ T125] irq_exit_rcu (kernel/softirq.c:741 (discriminator 38))
kern :warn : [ 93.524134] [ T125] sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1056 (discriminator 35) arch/x86/kernel/apic/apic.c:1056 (discriminator 35))
kern :warn : [ 93.531547] [ T125] asm_sysvec_apic_timer_interrupt (arch/x86/include/asm/idtentry.h:569)
kern :warn : [ 93.539311] [ T125] cpuidle_enter_state (drivers/cpuidle/cpuidle.c:294)
kern :warn : [ 93.546121] [ T125] cpuidle_enter (drivers/cpuidle/cpuidle.c:403 (discriminator 2))
kern :warn : [ 93.552324] [ T125] cpuidle_idle_call (kernel/sched/idle.c:161 kernel/sched/idle.c:237)
kern :warn : [ 93.559039] [ T125] do_idle (kernel/sched/idle.c:332)
kern :warn : [ 93.564800] [ T125] cpu_startup_entry (kernel/sched/idle.c:429)
kern :warn : [ 93.571342] [ T125] start_secondary (arch/x86/kernel/smpboot.c:200 (discriminator 10) arch/x86/kernel/smpboot.c:280 (discriminator 10))
kern :warn : [ 93.577886] [ T125] common_startup_64 (arch/x86/kernel/head_64.S:419)
kern :warn : [ 93.584604] [ T125] INITIAL USE at:
kern :warn : [ 93.588630] [ T125] __lock_acquire (kernel/locking/lockdep.c:5191 (discriminator 1))
kern :warn : [ 93.595007] [ T125] lock_acquire (include/trace/events/lock.h:24 (discriminator 15) include/trace/events/lock.h:24 (discriminator 15) kernel/locking/lockdep.c:5831 (discriminator 15))
kern :warn : [ 93.601736] [ T125] _raw_spin_lock_irqsave (include/linux/spinlock_api_smp.h:133 kernel/locking/spinlock.c:162)
kern :warn : [ 93.608635] [ T125] serial8250_do_set_termios (include/linux/serial_core.h:640 include/linux/serial_core.h:674 include/linux/serial_core.h:718 include/linux/serial_core.h:797 drivers/tty/serial/8250/8250_port.c:2760)
kern :warn : [ 93.615969] [ T125] uart_set_options (drivers/tty/serial/serial_core.c:2239)
kern :warn : [ 93.622513] [ T125] serial8250_console_setup (drivers/tty/serial/8250/8250_port.c:3405)
kern :warn : [ 93.629758] [ T125] univ8250_console_setup (drivers/tty/serial/8250/8250_core.c:430)
kern :warn : [ 93.636745] [ T125] try_enable_preferred_console (kernel/printk/printk.c:3882 kernel/printk/printk.c:3873 kernel/printk/printk.c:3926)
kern :warn : [ 93.644337] [ T125] register_console (kernel/printk/printk.c:4120)
kern :warn : [ 93.650898] [ T125] univ8250_console_init (drivers/tty/serial/8250/8250_core.c:516)
kern :warn : [ 93.657715] [ T125] console_init (kernel/printk/printk.c:4407)
kern :warn : [ 93.663915] [ T125] start_kernel (init/main.c:1148)
kern :warn : [ 93.670115] [ T125] __pfx_clear_bss (arch/x86/kernel/head64.c:310)
kern :warn : [ 93.676311] [ T125] x86_64_start_kernel (??:?)
kern :warn : [ 93.682946] [ T125] common_startup_64 (arch/x86/kernel/head_64.S:419)
kern :warn : [ 93.689577] [ T125] }
kern :warn : [ 93.692212] [ T125] ... key at: port_lock_key+0x0/0x40
kern :warn : [ 93.699982] [ T125]
the dependencies between the lock to be acquired
kern :warn : [ 93.699983] [ T125] and HARDIRQ-irq-unsafe lock:
kern :warn : [ 93.714039] [ T125] -> (fs_reclaim){+.+.}-{0:0} {
kern :warn : [ 93.719030] [ T125] HARDIRQ-ON-W at:
kern :warn : [ 93.723151] [ T125] __lock_acquire (kernel/locking/lockdep.c:5191 (discriminator 1))
kern :warn : [ 93.729625] [ T125] lock_acquire (include/trace/events/lock.h:24 (discriminator 15) include/trace/events/lock.h:24 (discriminator 15) kernel/locking/lockdep.c:5831 (discriminator 15))
The kernel config and materials to reproduce are available at:
https://download.01.org/0day-ci/archive/20260320/202603200800.38a86c8a-lkp@intel.com
--
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests/wiki
prev parent reply other threads:[~2026-03-20 7:51 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-03-17 0:37 [PATCH] dmaengine: idma64: use kzalloc_flex Rosen Penev
2026-03-20 7:51 ` kernel test robot [this message]
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