================================ WARNING: inconsistent lock state 6.0.0-rc7-syzkaller-18095-gbbed346d5a96 #0 Not tainted -------------------------------- inconsistent {SOFTIRQ-ON-W} -> {IN-SOFTIRQ-W} usage. swapper/1/0 [HC0[0]:SC1[1]:HE0:SE0] takes: ffff00011a938948 (kn->active#5){+.?.}-{0:0}, at: try_to_wake_up+0x5c/0x514 kernel/sched/core.c:4082 {SOFTIRQ-ON-W} state was registered at: lock_acquire+0x100/0x1f8 kernel/locking/lockdep.c:5666 kernfs_drain fs/kernfs/dir.c:478 [inline] __kernfs_remove+0x514/0x7d8 fs/kernfs/dir.c:1386 kernfs_remove_by_name_ns+0x68/0xb8 fs/kernfs/dir.c:1589 kernfs_remove_by_name include/linux/kernfs.h:615 [inline] remove_files fs/sysfs/group.c:28 [inline] sysfs_remove_group+0x68/0x160 fs/sysfs/group.c:288 sysfs_remove_groups+0x3c/0x78 fs/sysfs/group.c:312 driver_remove_groups+0x28/0x38 drivers/base/driver.c:211 bus_remove_driver+0x7c/0x110 drivers/base/bus.c:673 driver_unregister+0x3c/0x6c drivers/base/driver.c:274 pci_unregister_driver+0x28/0xc4 drivers/pci/pci-driver.c:1452 ipmi_si_pci_shutdown+0x2c/0x40 drivers/char/ipmi/ipmi_si_pci.c:159 cleanup_ipmi_si+0x2c/0x10c drivers/char/ipmi/ipmi_si_intf.c:2272 init_ipmi_si+0x2bc/0x2d0 drivers/char/ipmi/ipmi_si_intf.c:2146 do_one_initcall+0x118/0x22c init/main.c:1296 do_initcall_level+0xac/0xe4 init/main.c:1369 do_initcalls+0x58/0xa8 init/main.c:1385 do_basic_setup+0x20/0x2c init/main.c:1404 kernel_init_freeable+0xb8/0x148 init/main.c:1623 kernel_init+0x24/0x290 init/main.c:1512 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:860 irq event stamp: 2262087 hardirqs last enabled at (2262086): [] __raw_spin_unlock_irq include/linux/spinlock_api_smp.h:159 [inline] hardirqs last enabled at (2262086): [] _raw_spin_unlock_irq+0x3c/0x70 kernel/locking/spinlock.c:202 hardirqs last disabled at (2262087): [] __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:108 [inline] hardirqs last disabled at (2262087): [] _raw_spin_lock_irqsave+0xa4/0xb4 kernel/locking/spinlock.c:162 softirqs last enabled at (2262028): [] _stext+0x2e4/0x37c softirqs last disabled at (2262083): [] ____do_softirq+0x14/0x20 arch/arm64/kernel/irq.c:79 other info that might help us debug this: Possible unsafe locking scenario: CPU0 ---- lock(kn->active#5); lock(kn->active#5); *** DEADLOCK *** 1 lock held by swapper/1/0: #0: ffff80000800be20 ((&sci->sc_timer)){+.-.}-{0:0}, at: lockdep_copy_map include/linux/lockdep.h:31 [inline] #0: ffff80000800be20 ((&sci->sc_timer)){+.-.}-{0:0}, at: call_timer_fn+0x54/0x144 kernel/time/timer.c:1464 stack backtrace: CPU: 1 PID: 0 Comm: swapper/1 Not tainted 6.0.0-rc7-syzkaller-18095-gbbed346d5a96 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/30/2022 Call trace: dump_backtrace+0x1c4/0x1f0 arch/arm64/kernel/stacktrace.c:156 show_stack+0x2c/0x54 arch/arm64/kernel/stacktrace.c:163 __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x104/0x16c lib/dump_stack.c:106 dump_stack+0x1c/0x58 lib/dump_stack.c:113 print_usage_bug+0x39c/0x3cc kernel/locking/lockdep.c:3961 mark_lock_irq+0x4a8/0x4b4 mark_lock+0x154/0x1b4 kernel/locking/lockdep.c:4632 __lock_acquire+0x5a0/0x30a4 kernel/locking/lockdep.c:5007 lock_acquire+0x100/0x1f8 kernel/locking/lockdep.c:5666 __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline] _raw_spin_lock_irqsave+0x6c/0xb4 kernel/locking/spinlock.c:162 try_to_wake_up+0x5c/0x514 kernel/sched/core.c:4082 wake_up_process+0x18/0x24 kernel/sched/core.c:4314 nilfs_construction_timeout+0x20/0x30 fs/nilfs2/segment.c:2403 call_timer_fn+0x90/0x144 kernel/time/timer.c:1474 expire_timers kernel/time/timer.c:1519 [inline] __run_timers+0x280/0x374 kernel/time/timer.c:1790 run_timer_softirq+0x34/0x5c kernel/time/timer.c:1803 _stext+0x168/0x37c ____do_softirq+0x14/0x20 arch/arm64/kernel/irq.c:79 call_on_irq_stack+0x2c/0x54 arch/arm64/kernel/entry.S:889 do_softirq_own_stack+0x20/0x2c arch/arm64/kernel/irq.c:84 invoke_softirq+0x70/0xbc kernel/softirq.c:452 __irq_exit_rcu+0xf0/0x140 kernel/softirq.c:650 irq_exit_rcu+0x10/0x40 kernel/softirq.c:662 __el1_irq arch/arm64/kernel/entry-common.c:471 [inline] el1_interrupt+0x38/0x68 arch/arm64/kernel/entry-common.c:485 el1h_64_irq_handler+0x18/0x24 arch/arm64/kernel/entry-common.c:490 el1h_64_irq+0x64/0x68 arch/arm64/kernel/entry.S:577 arch_local_irq_enable+0xc/0x18 arch/arm64/include/asm/irqflags.h:35 default_idle_call+0x48/0xb8 kernel/sched/idle.c:109 cpuidle_idle_call kernel/sched/idle.c:191 [inline] do_idle+0x108/0x2d8 kernel/sched/idle.c:303 cpu_startup_entry+0x24/0x28 kernel/sched/idle.c:400 secondary_start_kernel+0x154/0x17c arch/arm64/kernel/smp.c:265 __secondary_switched+0xb0/0xb4 arch/arm64/kernel/head.S:618