================================ WARNING: inconsistent lock state 6.4.0-rc7-syzkaller-00072-gdad9774deaf1 #0 Not tainted -------------------------------- inconsistent {SOFTIRQ-ON-W} -> {IN-SOFTIRQ-W} usage. syz-executor.3/19547 [HC0[0]:SC1[1]:HE0:SE0] takes: ffff88807ffdc728 (&pgdat->memcg_lru.lock){+.?.}-{2:2}, at: spin_lock include/linux/spinlock.h:350 [inline] ffff88807ffdc728 (&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:5705 [inline] lock_acquire+0x1b1/0x520 kernel/locking/lockdep.c:5670 __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:5491 cgroup_init_subsys+0x46b/0x900 kernel/cgroup/cgroup.c:6022 cgroup_init+0xb83/0x1090 kernel/cgroup/cgroup.c:6106 start_kernel+0x398/0x490 init/main.c:1077 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+0xf4/0xfb irq event stamp: 653 hardirqs last enabled at (652): [] mod_memcg_state include/linux/memcontrol.h:982 [inline] hardirqs last enabled at (652): [] memcg_account_kmem+0x4f/0x80 mm/memcontrol.c:3094 hardirqs last disabled at (653): [] uncharge_batch+0x1c7/0x560 mm/memcontrol.c:7142 softirqs last enabled at (0): [] copy_process+0x227f/0x75c0 kernel/fork.c:2452 softirqs last disabled at (511): [] invoke_softirq kernel/softirq.c:445 [inline] softirqs last disabled at (511): [] __irq_exit_rcu+0x114/0x190 kernel/softirq.c:650 other info that might help us debug this: Possible unsafe locking scenario: CPU0 ---- lock(&pgdat->memcg_lru.lock); lock(&pgdat->memcg_lru.lock); *** DEADLOCK *** 2 locks held by syz-executor.3/19547: #0: ffff888023be76e8 (&mm->mmap_lock){++++}-{3:3}, at: mmap_write_lock include/linux/mmap_lock.h:94 [inline] #0: ffff888023be76e8 (&mm->mmap_lock){++++}-{3:3}, at: exit_mmap+0x1d4/0x930 mm/mmap.c:3116 #1: ffffffff8c796020 (rcu_callback){....}-{0:0}, at: rcu_do_batch kernel/rcu/tree.c:2104 [inline] #1: ffffffff8c796020 (rcu_callback){....}-{0:0}, at: rcu_core+0x791/0x1ad0 kernel/rcu/tree.c:2377 stack backtrace: CPU: 3 PID: 19547 Comm: syz-executor.3 Not tainted 6.4.0-rc7-syzkaller-00072-gdad9774deaf1 #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:3949 [inline] valid_state kernel/locking/lockdep.c:3991 [inline] mark_lock_irq kernel/locking/lockdep.c:4194 [inline] mark_lock.part.0+0x1110/0x1970 kernel/locking/lockdep.c:4656 mark_lock kernel/locking/lockdep.c:4620 [inline] mark_usage kernel/locking/lockdep.c:4545 [inline] __lock_acquire+0x1227/0x5f30 kernel/locking/lockdep.c:5042 lock_acquire kernel/locking/lockdep.c:5705 [inline] lock_acquire+0x1b1/0x520 kernel/locking/lockdep.c:5670 __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:2115 [inline] rcu_core+0x806/0x1ad0 kernel/rcu/tree.c:2377 __do_softirq+0x1d4/0x905 kernel/softirq.c:571 invoke_softirq kernel/softirq.c:445 [inline] __irq_exit_rcu+0x114/0x190 kernel/softirq.c:650 irq_exit_rcu+0x9/0x20 kernel/softirq.c:662 sysvec_apic_timer_interrupt+0x97/0xc0 arch/x86/kernel/apic/apic.c:1106 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:645 RIP: 0010:lockdep_enabled kernel/locking/lockdep.c:119 [inline] RIP: 0010:lock_is_held_type+0x26/0x140 kernel/locking/lockdep.c:5769 Code: 00 00 00 00 f3 0f 1e fa 41 57 41 56 41 55 41 bd ff ff ff ff 41 54 55 53 48 83 ec 08 8b 0d d2 75 6a 04 85 c9 0f 84 d9 00 00 00 <65> 8b 05 f3 fd f2 75 85 c0 0f 85 ca 00 00 00 65 4c 8b 24 25 00 ba RSP: 0018:ffffc90021e47980 EFLAGS: 00000202 RAX: 0000000000000001 RBX: 0000000000000000 RCX: 0000000000000001 RDX: 0000000000000000 RSI: 00000000ffffffff RDI: ffffffff8c7960e0 RBP: ffffffff8a5885c0 R08: 0000000000000007 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000094001 R12: 000000000000008b R13: 00000000ffffffff R14: 0000000000000000 R15: ffffc90021e47a60 lock_is_held include/linux/lockdep.h:288 [inline] __might_resched+0x414/0x580 kernel/sched/core.c:10115 remove_vma+0x1f/0x170 mm/mmap.c:139 exit_mmap+0x33e/0x930 mm/mmap.c:3130 __mmput+0x128/0x4c0 kernel/fork.c:1351 mmput+0x60/0x70 kernel/fork.c:1373 exit_mm kernel/exit.c:567 [inline] do_exit+0x9b0/0x29b0 kernel/exit.c:861 do_group_exit+0xd4/0x2a0 kernel/exit.c:1024 get_signal+0x2318/0x25b0 kernel/signal.c:2876 arch_do_signal_or_restart+0x79/0x5c0 arch/x86/kernel/signal.c:306 exit_to_user_mode_loop kernel/entry/common.c:168 [inline] exit_to_user_mode_prepare+0x11f/0x240 kernel/entry/common.c:204 __syscall_exit_to_user_mode_work kernel/entry/common.c:286 [inline] syscall_exit_to_user_mode+0x1d/0x50 kernel/entry/common.c:297 do_syscall_64+0x46/0xb0 arch/x86/entry/common.c:86 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x7f89ace8c389 Code: Unable to access opcode bytes at 0x7f89ace8c35f. RSP: 002b:00007f89adc0a218 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca RAX: 0000000000000001 RBX: 00007f89acfabf88 RCX: 00007f89ace8c389 RDX: 00000000000f4240 RSI: 0000000000000081 RDI: 00007f89acfabf8c RBP: 00007f89acfabf80 R08: 00007ffdfbdf0080 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007f89acfabf8c R13: 00007ffdfbd7f6af R14: 00007f89adc0a300 R15: 0000000000022000 ---------------- Code disassembly (best guess): 0: 00 00 add %al,(%rax) 2: 00 00 add %al,(%rax) 4: f3 0f 1e fa endbr64 8: 41 57 push %r15 a: 41 56 push %r14 c: 41 55 push %r13 e: 41 bd ff ff ff ff mov $0xffffffff,%r13d 14: 41 54 push %r12 16: 55 push %rbp 17: 53 push %rbx 18: 48 83 ec 08 sub $0x8,%rsp 1c: 8b 0d d2 75 6a 04 mov 0x46a75d2(%rip),%ecx # 0x46a75f4 22: 85 c9 test %ecx,%ecx 24: 0f 84 d9 00 00 00 je 0x103 * 2a: 65 8b 05 f3 fd f2 75 mov %gs:0x75f2fdf3(%rip),%eax # 0x75f2fe24 <-- trapping instruction 31: 85 c0 test %eax,%eax 33: 0f 85 ca 00 00 00 jne 0x103 39: 65 gs 3a: 4c rex.WR 3b: 8b .byte 0x8b 3c: 24 25 and $0x25,%al 3e: 00 .byte 0x0 3f: ba .byte 0xba