================================ WARNING: inconsistent lock state 6.4.0-rc6-syzkaller-00037-gb6dad5178cea #0 Not tainted -------------------------------- inconsistent {SOFTIRQ-ON-W} -> {IN-SOFTIRQ-W} usage. syz-executor458/12178 [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:4749 {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:4797 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: 1185 hardirqs last enabled at (1184): [] mod_memcg_state include/linux/memcontrol.h:982 [inline] hardirqs last enabled at (1184): [] memcg_account_kmem+0x4f/0x80 mm/memcontrol.c:3094 hardirqs last disabled at (1185): [] uncharge_batch+0x1c7/0x560 mm/memcontrol.c:7142 softirqs last enabled at (1064): [] netlink_insert+0x18d/0x16c0 net/netlink/af_netlink.c:609 softirqs last disabled at (1071): [] invoke_softirq kernel/softirq.c:445 [inline] softirqs last disabled at (1071): [] __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-executor458/12178: #0: ffffffff8e10b468 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:78 [inline] #0: ffffffff8e10b468 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x3e8/0xd50 net/core/rtnetlink.c:6414 #1: ffffffff8c795fe0 (rcu_callback){....}-{0:0}, at: rcu_do_batch kernel/rcu/tree.c:2104 [inline] #1: ffffffff8c795fe0 (rcu_callback){....}-{0:0}, at: rcu_core+0x791/0x1ad0 kernel/rcu/tree.c:2377 stack backtrace: CPU: 2 PID: 12178 Comm: syz-executor458 Not tainted 6.4.0-rc6-syzkaller-00037-gb6dad5178cea #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:4749 lru_gen_soft_reclaim+0x62/0x70 mm/vmscan.c:4852 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:cpu_relax arch/x86/include/asm/vdso/processor.h:19 [inline] RIP: 0010:mutex_spin_on_owner+0x1e3/0x2e0 kernel/locking/mutex.c:383 Code: 24 00 74 53 48 8d 7b 50 48 89 f8 48 c1 e8 03 42 80 3c 38 00 0f 85 e0 00 00 00 48 8b 04 24 48 3b 43 50 0f 85 f9 fe ff ff f3 90 97 fe ff ff 65 8b 05 d9 5d a0 7e a9 ff ff ff 7f 0f 85 68 fe ff RSP: 0018:ffffc9000fdaf518 EFLAGS: 00000246 RAX: 0000000000000000 RBX: ffffffff8e10b400 RCX: 1ffffffff18c0e14 RDX: fffffbfff1c21681 RSI: 0000000000000008 RDI: 0000000000000000 RBP: ffff8880245d9a00 R08: 0000000000000000 R09: ffffffff8e10b407 R10: fffffbfff1c21680 R11: 0000000000000001 R12: 0000000000000000 R13: ffffed10056e6360 R14: ffff88802b731b00 R15: dffffc0000000000 mutex_optimistic_spin kernel/locking/mutex.c:476 [inline] __mutex_lock_common kernel/locking/mutex.c:607 [inline] __mutex_lock+0x403/0x1350 kernel/locking/mutex.c:747 rtnl_lock net/core/rtnetlink.c:78 [inline] rtnetlink_rcv_msg+0x3e8/0xd50 net/core/rtnetlink.c:6414 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:724 [inline] sock_sendmsg+0xde/0x190 net/socket.c:747 ____sys_sendmsg+0x71c/0x900 net/socket.c:2503 ___sys_sendmsg+0x110/0x1b0 net/socket.c:2557 __sys_sendmsg+0xf7/0x1c0 net/socket.c:2586 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: 0033:0x7ff49d32df49 Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 51 15 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 c0 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007ffee168d528 EFLAGS: 00000246 ORIG_RAX: 000000000000002e RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 00007ff49d32df49 RDX: 0000000000000000 RSI: 0000000020000040 RDI: 0000000000000003 RBP: 0000000000000000 R08: 00007ffee168d550 R09: 00007ffee168d550 R10: 00007ffee168d550 R11: 0000000000000246 R12: 00007ffee168d54c R13: 00007ffee168d560 R14: 00007ffee168d5a0 R15: 00000000000006d3 ---------------- Code disassembly (best guess): 0: 24 00 and $0x0,%al 2: 74 53 je 0x57 4: 48 8d 7b 50 lea 0x50(%rbx),%rdi 8: 48 89 f8 mov %rdi,%rax b: 48 c1 e8 03 shr $0x3,%rax f: 42 80 3c 38 00 cmpb $0x0,(%rax,%r15,1) 14: 0f 85 e0 00 00 00 jne 0xfa 1a: 48 8b 04 24 mov (%rsp),%rax 1e: 48 3b 43 50 cmp 0x50(%rbx),%rax 22: 0f 85 f9 fe ff ff jne 0xffffff21 28: f3 90 pause * 2a: e9 97 fe ff ff jmpq 0xfffffec6 <-- trapping instruction 2f: 65 8b 05 d9 5d a0 7e mov %gs:0x7ea05dd9(%rip),%eax # 0x7ea05e0f 36: a9 ff ff ff 7f test $0x7fffffff,%eax 3b: 0f .byte 0xf 3c: 85 68 fe test %ebp,-0x2(%rax) 3f: ff .byte 0xff