================================ WARNING: inconsistent lock state 6.4.0-syzkaller-01647-g6e2332e0ab53 #0 Not tainted -------------------------------- inconsistent {SOFTIRQ-ON-W} -> {IN-SOFTIRQ-W} usage. syz-executor.3/3536 [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: 2529 hardirqs last enabled at (2528): [] mod_memcg_state include/linux/memcontrol.h:982 [inline] hardirqs last enabled at (2528): [] memcg_account_kmem+0x4f/0x80 mm/memcontrol.c:3094 hardirqs last disabled at (2529): [] uncharge_batch+0x1c7/0x560 mm/memcontrol.c:7142 softirqs last enabled at (1528): [] invoke_softirq kernel/softirq.c:427 [inline] softirqs last enabled at (1528): [] __irq_exit_rcu kernel/softirq.c:632 [inline] softirqs last enabled at (1528): [] irq_exit_rcu+0xb7/0x120 kernel/softirq.c:644 softirqs last disabled at (2399): [] invoke_softirq kernel/softirq.c:427 [inline] softirqs last disabled at (2399): [] __irq_exit_rcu kernel/softirq.c:632 [inline] softirqs last disabled at (2399): [] 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 *** 4 locks held by syz-executor.3/3536: #0: ffffffff8e1108e8 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:78 [inline] #0: ffffffff8e1108e8 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x3e8/0xd50 net/core/rtnetlink.c:6414 #1: ffffffff8c89e2f0 (shrinker_rwsem){++++}-{3:3}, at: shrink_slab_memcg mm/vmscan.c:937 [inline] #1: ffffffff8c89e2f0 (shrinker_rwsem){++++}-{3:3}, at: shrink_slab+0x2a0/0x6c0 mm/vmscan.c:1043 #2: ffff88802c3440e0 (&type->s_umount_key#51){.+.+}-{3:3}, at: trylock_super fs/super.c:414 [inline] #2: ffff88802c3440e0 (&type->s_umount_key#51){.+.+}-{3:3}, at: super_cache_scan+0x70/0x590 fs/super.c:79 #3: ffffffff8c7958e0 (rcu_callback){....}-{0:0}, at: rcu_do_batch kernel/rcu/tree.c:2124 [inline] #3: ffffffff8c7958e0 (rcu_callback){....}-{0:0}, at: rcu_core+0x78d/0x1c10 kernel/rcu/tree.c:2399 stack backtrace: CPU: 3 PID: 3536 Comm: syz-executor.3 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:finish_task_switch.isra.0+0x2bf/0xc80 kernel/sched/core.c:5253 Code: 8b 3a 4c 89 e7 48 c7 02 00 00 00 00 ff d1 4d 85 ff 75 bf 4c 89 e7 e8 60 f8 ff ff e8 5b 58 32 00 fb 65 48 8b 1c 25 00 ba 03 00 <48> 8d bb e8 15 00 00 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 RSP: 0018:ffffc9002197e4b8 EFLAGS: 00000202 RAX: 000000000000095b RBX: ffff888020a4d900 RCX: 1ffffffff22af47e RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000 RBP: ffffc9002197e500 R08: 0000000000000001 R09: ffffffff91532f6f R10: 0000000000000001 R11: 0000000000000001 R12: ffff88806b93c440 R13: ffff8880595a4a00 R14: 0000000000000000 R15: ffff88806b93ce80 context_switch kernel/sched/core.c:5384 [inline] __schedule+0xca2/0x5880 kernel/sched/core.c:6710 preempt_schedule_common+0x45/0xb0 kernel/sched/core.c:6879 preempt_schedule_thunk+0x1a/0x30 arch/x86/entry/thunk_64.S:45 __raw_spin_unlock include/linux/spinlock_api_smp.h:143 [inline] _raw_spin_unlock+0x3a/0x40 kernel/locking/spinlock.c:186 spin_unlock include/linux/spinlock.h:390 [inline] list_lru_walk_one+0xb3/0xe0 mm/list_lru.c:278 list_lru_shrink_walk include/linux/list_lru.h:194 [inline] prune_dcache_sb+0xe0/0x150 fs/dcache.c:1280 super_cache_scan+0x33a/0x590 fs/super.c:104 do_shrink_slab+0x428/0xaa0 mm/vmscan.c:895 shrink_slab_memcg mm/vmscan.c:964 [inline] shrink_slab+0x38f/0x6c0 mm/vmscan.c:1043 shrink_node_memcgs mm/vmscan.c:6454 [inline] shrink_node+0x7ce/0x3500 mm/vmscan.c:6487 shrink_zones mm/vmscan.c:6722 [inline] do_try_to_free_pages+0x3b4/0x17b0 mm/vmscan.c:6784 try_to_free_mem_cgroup_pages+0x368/0x840 mm/vmscan.c:7099 try_charge_memcg+0x505/0x13a0 mm/memcontrol.c:2724 obj_cgroup_charge_pages mm/memcontrol.c:3138 [inline] obj_cgroup_charge+0x2af/0x5e0 mm/memcontrol.c:3428 memcg_slab_pre_alloc_hook mm/slab.h:503 [inline] slab_pre_alloc_hook mm/slab.h:714 [inline] slab_alloc_node mm/slab.c:3240 [inline] __kmem_cache_alloc_node+0x93/0x3f0 mm/slab.c:3540 __do_kmalloc_node mm/slab_common.c:965 [inline] __kmalloc_node+0x51/0x1a0 mm/slab_common.c:973 kmalloc_node include/linux/slab.h:579 [inline] kvmalloc_node+0xa2/0x1a0 mm/util.c:604 kvmalloc include/linux/slab.h:697 [inline] kvzalloc include/linux/slab.h:705 [inline] netif_alloc_rx_queues net/core/dev.c:9883 [inline] alloc_netdev_mqs+0xbc9/0x1250 net/core/dev.c:10694 rtnl_create_link+0xc17/0xf20 net/core/rtnetlink.c:3332 veth_newlink+0x227/0x9d0 drivers/net/veth.c:1882 rtnl_newlink_create net/core/rtnetlink.c:3465 [inline] __rtnl_newlink+0x10c2/0x1840 net/core/rtnetlink.c:3682 rtnl_newlink+0x68/0xa0 net/core/rtnetlink.c:3695 rtnetlink_rcv_msg+0x43d/0xd50 net/core/rtnetlink.c:6417 netlink_rcv_skb+0x165/0x440 net/netlink/af_netlink.c:2546 netlink_unicast_kernel net/netlink/af_netlink.c:1339 [inline] netlink_unicast+0x547/0x7f0 net/netlink/af_netlink.c:1365 netlink_sendmsg+0x925/0xe30 net/netlink/af_netlink.c:1913 sock_sendmsg_nosec net/socket.c:725 [inline] sock_sendmsg+0xde/0x190 net/socket.c:748 ____sys_sendmsg+0x722/0x900 net/socket.c:2504 ___sys_sendmsg+0x110/0x1b0 net/socket.c:2558 __sys_sendmsg+0xf7/0x1c0 net/socket.c:2587 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x39/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x7f5b0268c389 Code: 28 00 00 00 75 05 48 83 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 c3 48 c7 c1 b8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f5b0331b168 EFLAGS: 00000246 ORIG_RAX: 000000000000002e RAX: ffffffffffffffda RBX: 00007f5b027abf80 RCX: 00007f5b0268c389 RDX: 0000000000000000 RSI: 00000000200000c0 RDI: 0000000000000006 RBP: 00007f5b026d7493 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffea91a4b9f R14: 00007f5b0331b300 R15: 0000000000022000 ---------------- Code disassembly (best guess): 0: 8b 3a mov (%rdx),%edi 2: 4c 89 e7 mov %r12,%rdi 5: 48 c7 02 00 00 00 00 movq $0x0,(%rdx) c: ff d1 callq *%rcx e: 4d 85 ff test %r15,%r15 11: 75 bf jne 0xffffffd2 13: 4c 89 e7 mov %r12,%rdi 16: e8 60 f8 ff ff callq 0xfffff87b 1b: e8 5b 58 32 00 callq 0x32587b 20: fb sti 21: 65 48 8b 1c 25 00 ba mov %gs:0x3ba00,%rbx 28: 03 00 * 2a: 48 8d bb e8 15 00 00 lea 0x15e8(%rbx),%rdi <-- trapping instruction 31: 48 b8 00 00 00 00 00 movabs $0xdffffc0000000000,%rax 38: fc ff df 3b: 48 89 fa mov %rdi,%rdx 3e: 48 rex.W 3f: c1 .byte 0xc1