================================ WARNING: inconsistent lock state 6.6.0-rc6-syzkaller-01824-gf3bbfe4dbfd4 #0 Not tainted -------------------------------- inconsistent {SOFTIRQ-ON-W} -> {IN-SOFTIRQ-W} usage. dhcpcd-run-hook/27336 [HC0[0]:SC1[1]:HE1:SE0] takes: ffffffff8e69d658 (nf_connlabels_lock){+.?.}-{2:2}, at: spin_lock include/linux/spinlock.h:351 [inline] ffffffff8e69d658 (nf_connlabels_lock){+.?.}-{2:2}, at: nf_connlabels_put+0x19/0x60 net/netfilter/nf_conntrack_labels.c:78 {SOFTIRQ-ON-W} state was registered at: lock_acquire kernel/locking/lockdep.c:5753 [inline] lock_acquire+0x1ae/0x510 kernel/locking/lockdep.c:5718 __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:351 [inline] nf_connlabels_get+0x32/0x90 net/netfilter/nf_conntrack_labels.c:66 ovs_ct_init+0x62/0x4c0 net/openvswitch/conntrack.c:1975 ovs_init_net+0x2ff/0x5a0 net/openvswitch/datapath.c:2638 ops_init+0xb9/0x650 net/core/net_namespace.c:136 __register_pernet_operations net/core/net_namespace.c:1165 [inline] register_pernet_operations+0x34b/0x820 net/core/net_namespace.c:1234 register_pernet_device+0x29/0x70 net/core/net_namespace.c:1321 dp_init+0xb7/0x2b0 net/openvswitch/datapath.c:2745 do_one_initcall+0x117/0x630 init/main.c:1232 do_initcall_level init/main.c:1294 [inline] do_initcalls init/main.c:1310 [inline] do_basic_setup init/main.c:1329 [inline] kernel_init_freeable+0x5c2/0x900 init/main.c:1547 kernel_init+0x1c/0x2a0 init/main.c:1437 ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:304 irq event stamp: 1482 hardirqs last enabled at (1482): [] __raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:151 [inline] hardirqs last enabled at (1482): [] _raw_spin_unlock_irqrestore+0x4e/0x70 kernel/locking/spinlock.c:194 hardirqs last disabled at (1481): [] __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:108 [inline] hardirqs last disabled at (1481): [] _raw_spin_lock_irqsave+0x4e/0x50 kernel/locking/spinlock.c:162 softirqs last enabled at (940): [] local_bh_enable include/linux/bottom_half.h:33 [inline] softirqs last enabled at (940): [] fpregs_unlock arch/x86/include/asm/fpu/api.h:80 [inline] softirqs last enabled at (940): [] fpu_reset_fpregs arch/x86/kernel/fpu/core.c:733 [inline] softirqs last enabled at (940): [] fpu_flush_thread+0x309/0x400 arch/x86/kernel/fpu/core.c:777 softirqs last disabled at (1447): [] invoke_softirq kernel/softirq.c:427 [inline] softirqs last disabled at (1447): [] __irq_exit_rcu kernel/softirq.c:632 [inline] softirqs last disabled at (1447): [] irq_exit_rcu+0xb7/0x120 kernel/softirq.c:644 other info that might help us debug this: Possible unsafe locking scenario: CPU0 ---- lock(nf_connlabels_lock); lock(nf_connlabels_lock); *** DEADLOCK *** 6 locks held by dhcpcd-run-hook/27336: #0: ffff8880499a6220 (&vma->vm_lock->lock){++++}-{3:3}, at: vma_start_read include/linux/mm.h:665 [inline] #0: ffff8880499a6220 (&vma->vm_lock->lock){++++}-{3:3}, at: lock_vma_under_rcu+0x1da/0x7a0 mm/memory.c:5440 #1: ffffffff8cbab3a0 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:303 [inline] #1: ffffffff8cbab3a0 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:749 [inline] #1: ffffffff8cbab3a0 (rcu_read_lock){....}-{1:2}, at: do_fault_around mm/memory.c:4524 [inline] #1: ffffffff8cbab3a0 (rcu_read_lock){....}-{1:2}, at: do_read_fault mm/memory.c:4558 [inline] #1: ffffffff8cbab3a0 (rcu_read_lock){....}-{1:2}, at: do_fault mm/memory.c:4705 [inline] #1: ffffffff8cbab3a0 (rcu_read_lock){....}-{1:2}, at: do_pte_missing mm/memory.c:3669 [inline] #1: ffffffff8cbab3a0 (rcu_read_lock){....}-{1:2}, at: handle_pte_fault mm/memory.c:4978 [inline] #1: ffffffff8cbab3a0 (rcu_read_lock){....}-{1:2}, at: __handle_mm_fault+0x2892/0x3e10 mm/memory.c:5119 #2: ffffffff8cbab3a0 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:303 [inline] #2: ffffffff8cbab3a0 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:749 [inline] #2: ffffffff8cbab3a0 (rcu_read_lock){....}-{1:2}, at: filemap_map_pages+0x178/0x1330 mm/filemap.c:3571 #3: ffffffff8cbab3a0 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:303 [inline] #3: ffffffff8cbab3a0 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:749 [inline] #3: ffffffff8cbab3a0 (rcu_read_lock){....}-{1:2}, at: __pte_offset_map+0x42/0x540 mm/pgtable-generic.c:285 #4: ffff888079c8e0d8 (ptlock_ptr(ptdesc)#2){+.+.}-{2:2}, at: spin_lock include/linux/spinlock.h:351 [inline] #4: ffff888079c8e0d8 (ptlock_ptr(ptdesc)#2){+.+.}-{2:2}, at: __pte_offset_map_lock+0xf1/0x2f0 mm/pgtable-generic.c:373 #5: ffffffff8cbab280 (rcu_callback){....}-{0:0}, at: rcu_lock_acquire include/linux/rcupdate.h:303 [inline] #5: ffffffff8cbab280 (rcu_callback){....}-{0:0}, at: rcu_do_batch kernel/rcu/tree.c:2134 [inline] #5: ffffffff8cbab280 (rcu_callback){....}-{0:0}, at: rcu_core+0x7c1/0x1bb0 kernel/rcu/tree.c:2403 stack backtrace: CPU: 1 PID: 27336 Comm: dhcpcd-run-hook Not tainted 6.6.0-rc6-syzkaller-01824-gf3bbfe4dbfd4 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/06/2023 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0xd9/0x1b0 lib/dump_stack.c:106 print_usage_bug kernel/locking/lockdep.c:3970 [inline] valid_state kernel/locking/lockdep.c:4012 [inline] mark_lock_irq kernel/locking/lockdep.c:4215 [inline] mark_lock+0x11f3/0x1950 kernel/locking/lockdep.c:4677 mark_usage kernel/locking/lockdep.c:4566 [inline] __lock_acquire+0x165c/0x5de0 kernel/locking/lockdep.c:5090 lock_acquire kernel/locking/lockdep.c:5753 [inline] lock_acquire+0x1ae/0x510 kernel/locking/lockdep.c:5718 __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:351 [inline] nf_connlabels_put+0x19/0x60 net/netfilter/nf_conntrack_labels.c:78 tcf_ct_params_free+0x251/0x460 net/sched/act_ct.c:833 rcu_do_batch kernel/rcu/tree.c:2139 [inline] rcu_core+0x805/0x1bb0 kernel/rcu/tree.c:2403 __do_softirq+0x218/0x965 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+0x93/0xc0 arch/x86/kernel/apic/apic.c:1074 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:645 RIP: 0010:percpu_counter_add_batch+0xe6/0x1f0 lib/percpu_counter.c:103 Code: e8 9f 4c 33 fd 48 85 db 75 42 e8 05 51 33 fd 9c 5b 81 e3 00 02 00 00 31 ff 48 89 de e8 83 4c 33 fd 48 85 db 0f 85 bd 00 00 00 <48> 83 c4 18 5b 5d 41 5c 41 5d 41 5e 41 5f e9 d7 50 33 fd e8 d2 50 RSP: 0000:ffffc9000a7a7af8 EFLAGS: 00000293 RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000 RDX: ffff88802c3c5940 RSI: ffffffff845494c2 RDI: 0000000000000007 RBP: ffff88802a7ced10 R08: 0000000000000007 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: 000000000000000a R13: 0000000000000001 R14: 0000607f46426148 R15: 0000000000000020 percpu_counter_add include/linux/percpu_counter.h:69 [inline] add_mm_counter include/linux/mm.h:2552 [inline] set_pte_range+0x3b0/0xa10 mm/memory.c:4355 filemap_map_order0_folio mm/filemap.c:3552 [inline] filemap_map_pages+0x458/0x1330 mm/filemap.c:3598 do_fault_around mm/memory.c:4525 [inline] do_read_fault mm/memory.c:4558 [inline] do_fault mm/memory.c:4705 [inline] do_pte_missing mm/memory.c:3669 [inline] handle_pte_fault mm/memory.c:4978 [inline] __handle_mm_fault+0x291c/0x3e10 mm/memory.c:5119 handle_mm_fault+0x478/0xa00 mm/memory.c:5284 do_user_addr_fault+0x30b/0x1000 arch/x86/mm/fault.c:1364 handle_page_fault arch/x86/mm/fault.c:1505 [inline] exc_page_fault+0x5c/0xd0 arch/x86/mm/fault.c:1561 asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:570 RIP: 0033:0x7fa702e3df80 Code: Unable to access opcode bytes at 0x7fa702e3df56. RSP: 002b:00007fffb6c19ba8 EFLAGS: 00010246 RAX: 00007fa702e4ad20 RBX: 00007fffb6c19e78 RCX: 0000000000000000 RDX: 0000000000000000 RSI: 00007fa702e5a3d4 RDI: 00007fa702e5a3d4 RBP: 00007fffb6c19e50 R08: 0000000020000000 R09: 0000000000000000 R10: 00007fffb6c19e01 R11: 0000000000000003 R12: 0000000000000000 R13: 00007fffb6c19ed0 R14: 0000000000000000 R15: 00007fa702e34858 ---------------- Code disassembly (best guess): 0: e8 9f 4c 33 fd call 0xfd334ca4 5: 48 85 db test %rbx,%rbx 8: 75 42 jne 0x4c a: e8 05 51 33 fd call 0xfd335114 f: 9c pushf 10: 5b pop %rbx 11: 81 e3 00 02 00 00 and $0x200,%ebx 17: 31 ff xor %edi,%edi 19: 48 89 de mov %rbx,%rsi 1c: e8 83 4c 33 fd call 0xfd334ca4 21: 48 85 db test %rbx,%rbx 24: 0f 85 bd 00 00 00 jne 0xe7 * 2a: 48 83 c4 18 add $0x18,%rsp <-- trapping instruction 2e: 5b pop %rbx 2f: 5d pop %rbp 30: 41 5c pop %r12 32: 41 5d pop %r13 34: 41 5e pop %r14 36: 41 5f pop %r15 38: e9 d7 50 33 fd jmp 0xfd335114 3d: e8 .byte 0xe8 3e: d2 .byte 0xd2 3f: 50 push %rax