================================ WARNING: inconsistent lock state 6.4.0-syzkaller-01647-g6e2332e0ab53 #0 Not tainted -------------------------------- inconsistent {SOFTIRQ-ON-W} -> {IN-SOFTIRQ-W} usage. swapper/0/0 [HC0[0]:SC1[1]:HE0:SE0] takes: ffff88817fffc728 (&pgdat->memcg_lru.lock){+.?.}-{2:2}, at: spin_lock include/linux/spinlock.h:350 [inline] ffff88817fffc728 (&pgdat->memcg_lru.lock){+.?.}-{2:2}, at: lru_gen_rotate_memcg+0x64/0xab0 mm/vmscan.c:4734 {SOFTIRQ-ON-W} state was registered at: lock_acquire kernel/locking/lockdep.c:5761 [inline] lock_acquire+0x1b1/0x520 kernel/locking/lockdep.c:5726 __raw_spin_lock include/linux/spinlock_api_smp.h:133 [inline] _raw_spin_lock+0x2e/0x40 kernel/locking/spinlock.c:154 spin_lock include/linux/spinlock.h:350 [inline] lru_gen_online_memcg+0x16b/0x5a0 mm/vmscan.c:4782 mem_cgroup_css_online+0x227/0x3b0 mm/memcontrol.c:5468 online_css+0xaf/0x2a0 kernel/cgroup/cgroup.c:5462 cgroup_init_subsys+0x46b/0x900 kernel/cgroup/cgroup.c:5993 cgroup_init+0xb83/0x1090 kernel/cgroup/cgroup.c:6077 start_kernel+0x398/0x490 init/main.c:1066 x86_64_start_reservations+0x18/0x30 arch/x86/kernel/head64.c:556 x86_64_start_kernel+0xb3/0xc0 arch/x86/kernel/head64.c:537 secondary_startup_64_no_verify+0x167/0x16b irq event stamp: 1657273 hardirqs last enabled at (1657272): [] mod_memcg_state include/linux/memcontrol.h:982 [inline] hardirqs last enabled at (1657272): [] memcg_account_kmem+0x4f/0x80 mm/memcontrol.c:3094 hardirqs last disabled at (1657273): [] uncharge_batch+0x1c7/0x560 mm/memcontrol.c:7142 softirqs last enabled at (1657126): [] invoke_softirq kernel/softirq.c:427 [inline] softirqs last enabled at (1657126): [] __irq_exit_rcu kernel/softirq.c:632 [inline] softirqs last enabled at (1657126): [] irq_exit_rcu+0xb7/0x120 kernel/softirq.c:644 softirqs last disabled at (1657151): [] invoke_softirq kernel/softirq.c:427 [inline] softirqs last disabled at (1657151): [] __irq_exit_rcu kernel/softirq.c:632 [inline] softirqs last disabled at (1657151): [] irq_exit_rcu+0xb7/0x120 kernel/softirq.c:644 other info that might help us debug this: Possible unsafe locking scenario: CPU0 ---- lock(&pgdat->memcg_lru.lock); lock(&pgdat->memcg_lru.lock); *** DEADLOCK *** 1 lock held by swapper/0/0: #0: ffffffff8c7958e0 (rcu_callback){....}-{0:0}, at: rcu_do_batch kernel/rcu/tree.c:2124 [inline] #0: ffffffff8c7958e0 (rcu_callback){....}-{0:0}, at: rcu_core+0x78d/0x1c10 kernel/rcu/tree.c:2399 stack backtrace: CPU: 0 PID: 0 Comm: swapper/0 Not tainted 6.4.0-syzkaller-01647-g6e2332e0ab53 #0 Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.14.0-2 04/01/2014 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0xd9/0x150 lib/dump_stack.c:106 print_usage_bug kernel/locking/lockdep.c:3978 [inline] valid_state kernel/locking/lockdep.c:4020 [inline] mark_lock_irq kernel/locking/lockdep.c:4223 [inline] mark_lock.part.0+0x1102/0x1960 kernel/locking/lockdep.c:4685 mark_lock kernel/locking/lockdep.c:4649 [inline] mark_usage kernel/locking/lockdep.c:4574 [inline] __lock_acquire+0x1231/0x5e20 kernel/locking/lockdep.c:5098 lock_acquire kernel/locking/lockdep.c:5761 [inline] lock_acquire+0x1b1/0x520 kernel/locking/lockdep.c:5726 __raw_spin_lock include/linux/spinlock_api_smp.h:133 [inline] _raw_spin_lock+0x2e/0x40 kernel/locking/spinlock.c:154 spin_lock include/linux/spinlock.h:350 [inline] lru_gen_rotate_memcg+0x64/0xab0 mm/vmscan.c:4734 lru_gen_soft_reclaim+0x62/0x70 mm/vmscan.c:4837 uncharge_batch+0x2be/0x560 mm/memcontrol.c:7145 __mem_cgroup_uncharge+0x11f/0x290 mm/memcontrol.c:7221 mem_cgroup_uncharge include/linux/memcontrol.h:698 [inline] __folio_put_small mm/swap.c:105 [inline] __folio_put+0xb6/0x140 mm/swap.c:129 folio_put include/linux/mm.h:1430 [inline] put_page include/linux/mm.h:1499 [inline] free_page_and_swap_cache+0x257/0x2c0 mm/swap_state.c:305 __tlb_remove_table arch/x86/include/asm/tlb.h:34 [inline] __tlb_remove_table_free mm/mmu_gather.c:153 [inline] tlb_remove_table_rcu+0x89/0xe0 mm/mmu_gather.c:208 rcu_do_batch kernel/rcu/tree.c:2135 [inline] rcu_core+0x802/0x1c10 kernel/rcu/tree.c:2399 __do_softirq+0x1d4/0x905 kernel/softirq.c:553 invoke_softirq kernel/softirq.c:427 [inline] __irq_exit_rcu kernel/softirq.c:632 [inline] irq_exit_rcu+0xb7/0x120 kernel/softirq.c:644 sysvec_apic_timer_interrupt+0x97/0xc0 arch/x86/kernel/apic/apic.c:1109 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:645 RIP: 0010:native_irq_disable arch/x86/include/asm/irqflags.h:37 [inline] RIP: 0010:arch_local_irq_disable arch/x86/include/asm/irqflags.h:72 [inline] RIP: 0010:__intel_idle_hlt drivers/idle/intel_idle.c:206 [inline] RIP: 0010:intel_idle_hlt+0x23/0x30 drivers/idle/intel_idle.c:224 Code: 1f 84 00 00 00 00 00 f3 0f 1e fa 41 54 41 89 d4 0f 1f 44 00 00 66 90 0f 1f 44 00 00 0f 00 2d e4 bc 9c 00 0f 1f 44 00 00 fb f4 44 89 e0 41 5c c3 66 0f 1f 44 00 00 f3 0f 1e fa 41 54 41 89 d4 RSP: 0018:ffffffff8c407d78 EFLAGS: 00000242 RAX: 000000000019493d RBX: ffffe8fefd655380 RCX: ffffffff8a10edf5 RDX: 0000000000000002 RSI: ffffffff8d198e00 RDI: ffffe8fefd655380 RBP: ffffffff8d198e00 R08: 0000000000000001 R09: ffff88806b636ceb R10: ffffed100d6c6d9d R11: 0000000000000001 R12: 0000000000000002 R13: ffffffff8d198ee8 R14: 0000000000000002 R15: 0000000000000000 cpuidle_enter_state+0xd3/0x6f0 drivers/cpuidle/cpuidle.c:267 cpuidle_enter+0x4e/0xa0 drivers/cpuidle/cpuidle.c:388 cpuidle_idle_call kernel/sched/idle.c:215 [inline] do_idle+0x2fe/0x3c0 kernel/sched/idle.c:282 cpu_startup_entry+0x18/0x20 kernel/sched/idle.c:379 rest_init+0x16f/0x2b0 init/main.c:733 arch_call_rest_init+0x13/0x30 init/main.c:830 start_kernel+0x3b1/0x490 init/main.c:1075 x86_64_start_reservations+0x18/0x30 arch/x86/kernel/head64.c:556 x86_64_start_kernel+0xb3/0xc0 arch/x86/kernel/head64.c:537 secondary_startup_64_no_verify+0x167/0x16b ---------------- Code disassembly (best guess), 1 bytes skipped: 0: 84 00 test %al,(%rax) 2: 00 00 add %al,(%rax) 4: 00 00 add %al,(%rax) 6: f3 0f 1e fa endbr64 a: 41 54 push %r12 c: 41 89 d4 mov %edx,%r12d f: 0f 1f 44 00 00 nopl 0x0(%rax,%rax,1) 14: 66 90 xchg %ax,%ax 16: 0f 1f 44 00 00 nopl 0x0(%rax,%rax,1) 1b: 0f 00 2d e4 bc 9c 00 verw 0x9cbce4(%rip) # 0x9cbd06 22: 0f 1f 44 00 00 nopl 0x0(%rax,%rax,1) 27: fb sti 28: f4 hlt * 29: fa cli <-- trapping instruction 2a: 44 89 e0 mov %r12d,%eax 2d: 41 5c pop %r12 2f: c3 retq 30: 66 0f 1f 44 00 00 nopw 0x0(%rax,%rax,1) 36: f3 0f 1e fa endbr64 3a: 41 54 push %r12 3c: 41 89 d4 mov %edx,%r12d