================================ WARNING: inconsistent lock state 6.4.0-rc7-syzkaller-00226-ga92b7d26c743 #0 Not tainted -------------------------------- inconsistent {SOFTIRQ-ON-W} -> {IN-SOFTIRQ-W} usage. syz-executor.3/18850 [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:5505 cgroup_init_subsys+0x46b/0x900 kernel/cgroup/cgroup.c:6036 cgroup_init+0xb83/0x1090 kernel/cgroup/cgroup.c:6120 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: 6629 hardirqs last enabled at (6628): [] mod_memcg_state include/linux/memcontrol.h:982 [inline] hardirqs last enabled at (6628): [] memcg_account_kmem+0x4f/0x80 mm/memcontrol.c:3094 hardirqs last disabled at (6629): [] uncharge_batch+0x1c7/0x560 mm/memcontrol.c:7142 softirqs last enabled at (2400): [] invoke_softirq kernel/softirq.c:445 [inline] softirqs last enabled at (2400): [] __irq_exit_rcu+0x114/0x190 kernel/softirq.c:650 softirqs last disabled at (6525): [] invoke_softirq kernel/softirq.c:445 [inline] softirqs last disabled at (6525): [] __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.3/18850: #0: ffff8881073b6460 (sb_writers#5){.+.+}-{0:0}, at: get_signal+0x1c02/0x25b0 kernel/signal.c:2862 #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: 18850 Comm: syz-executor.3 Not tainted 6.4.0-rc7-syzkaller-00226-ga92b7d26c743 #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:lock_is_held_type+0x103/0x140 kernel/locking/lockdep.c:5781 Code: 00 00 b8 ff ff ff ff 65 0f c1 05 f8 dc f2 75 83 f8 01 75 29 9c 58 f6 c4 02 75 3d 48 f7 04 24 00 02 00 00 74 01 fb 48 83 c4 08 <44> 89 e8 5b 5d 41 5c 41 5d 41 5e 41 5f c3 45 31 ed eb b9 0f 0b 48 RSP: 0018:ffffc9000c5f7360 EFLAGS: 00000296 RAX: 0000000000000046 RBX: 0000000000000001 RCX: 0000000000000001 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000 RBP: ffffffff8c796080 R08: 0000000000000006 R09: 0000001b2cd97000 R10: 0000001b2d120000 R11: 0000000000094001 R12: ffff88804f725880 R13: 0000000000000000 R14: 00000000ffffffff R15: ffff88804f726348 lock_is_held include/linux/lockdep.h:288 [inline] __might_resched+0x46b/0x580 kernel/sched/core.c:10115 down_read_killable+0x79/0x4f0 kernel/locking/rwsem.c:1542 mmap_read_lock_killable include/linux/mmap_lock.h:151 [inline] __get_user_pages_locked mm/gup.c:1356 [inline] get_dump_page+0xb6/0x210 mm/gup.c:1897 dump_user_range+0x3e6/0x710 fs/coredump.c:913 elf_core_dump+0x277e/0x36e0 fs/binfmt_elf.c:2142 do_coredump+0x2f2b/0x4020 fs/coredump.c:764 get_signal+0x1c02/0x25b0 kernel/signal.c:2862 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 irqentry_exit_to_user_mode+0x9/0x40 kernel/entry/common.c:310 asm_exc_general_protection+0x26/0x30 arch/x86/include/asm/idtentry.h:564 RIP: 0033:0x7f10ff48c391 Code: c4 28 c3 e8 f1 19 00 00 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 48 3d 01 f0 ff ff 73 01 48 c7 c1 b8 ff ff ff f7 d8 64 89 01 48 83 c8 ff c3 66 2e 0f 1f RSP: 002b:0000000020000320 EFLAGS: 00010217 RAX: 0000000000000000 RBX: 00007f10ff5abf80 RCX: 00007f10ff48c389 RDX: 00000000200003c0 RSI: 0000000020000320 RDI: 0000000001000000 RBP: 00007f10ff4d7493 R08: 0000000020000440 R09: 0000000020000440 R10: 0000000020000400 R11: 0000000000000206 R12: 0000000000000000 R13: 00007ffdcee6e8df R14: 00007f1100175300 R15: 0000000000022000 ---------------- Code disassembly (best guess): 0: 00 00 add %al,(%rax) 2: b8 ff ff ff ff mov $0xffffffff,%eax 7: 65 0f c1 05 f8 dc f2 xadd %eax,%gs:0x75f2dcf8(%rip) # 0x75f2dd07 e: 75 f: 83 f8 01 cmp $0x1,%eax 12: 75 29 jne 0x3d 14: 9c pushfq 15: 58 pop %rax 16: f6 c4 02 test $0x2,%ah 19: 75 3d jne 0x58 1b: 48 f7 04 24 00 02 00 testq $0x200,(%rsp) 22: 00 23: 74 01 je 0x26 25: fb sti 26: 48 83 c4 08 add $0x8,%rsp * 2a: 44 89 e8 mov %r13d,%eax <-- trapping instruction 2d: 5b pop %rbx 2e: 5d pop %rbp 2f: 41 5c pop %r12 31: 41 5d pop %r13 33: 41 5e pop %r14 35: 41 5f pop %r15 37: c3 retq 38: 45 31 ed xor %r13d,%r13d 3b: eb b9 jmp 0xfffffff6 3d: 0f 0b ud2 3f: 48 rex.W