================================ WARNING: inconsistent lock state 6.6.0-rc6-syzkaller-01837-gdf3bc66219e3 #0 Not tainted -------------------------------- inconsistent {SOFTIRQ-ON-W} -> {IN-SOFTIRQ-W} usage. sshd/5040 [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: 3030552 hardirqs last enabled at (3030552): [] __raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:151 [inline] hardirqs last enabled at (3030552): [] _raw_spin_unlock_irqrestore+0x4e/0x70 kernel/locking/spinlock.c:194 hardirqs last disabled at (3030551): [] __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:108 [inline] hardirqs last disabled at (3030551): [] _raw_spin_lock_irqsave+0x4e/0x50 kernel/locking/spinlock.c:162 softirqs last enabled at (3030342): [] tcp_sendmsg+0x38/0x40 net/ipv4/tcp.c:1339 softirqs last disabled at (3030447): [] invoke_softirq kernel/softirq.c:427 [inline] softirqs last disabled at (3030447): [] __irq_exit_rcu kernel/softirq.c:632 [inline] softirqs last disabled at (3030447): [] 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 *** 1 lock held by sshd/5040: #0: ffffffff8cbab280 (rcu_callback){....}-{0:0}, at: rcu_lock_acquire include/linux/rcupdate.h:303 [inline] #0: ffffffff8cbab280 (rcu_callback){....}-{0:0}, at: rcu_do_batch kernel/rcu/tree.c:2134 [inline] #0: ffffffff8cbab280 (rcu_callback){....}-{0:0}, at: rcu_core+0x7c1/0x1bb0 kernel/rcu/tree.c:2403 stack backtrace: CPU: 0 PID: 5040 Comm: sshd Not tainted 6.6.0-rc6-syzkaller-01837-gdf3bc66219e3 #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:lock_release+0x3b8/0x680 kernel/locking/lockdep.c:5761 Code: 7e 83 f8 01 0f 85 dd 01 00 00 9c 58 f6 c4 02 0f 85 c8 01 00 00 48 f7 04 24 00 02 00 00 74 01 fb 48 b8 00 00 00 00 00 fc ff df <48> 01 c5 48 c7 45 00 00 00 00 00 c7 45 08 00 00 00 00 48 8b 84 24 RSP: 0018:ffffc900039af7f0 EFLAGS: 00000206 RAX: dffffc0000000000 RBX: ffffffffffffffff RCX: ffffc900039af840 RDX: 1ffff110033dc50f RSI: ffffffff8a8cafa0 RDI: ffffffff8ae93ea0 RBP: 1ffff92000735f00 R08: 0000000000000000 R09: fffffbfff1d989aa R10: ffffffff8ecc4d57 R11: 0000000000000000 R12: 0000000000000000 R13: 0000000000000001 R14: ffff888019ee2880 R15: ffff888019ee1dc0 __might_fault mm/memory.c:5896 [inline] __might_fault+0x158/0x1a0 mm/memory.c:5889 _copy_from_user+0x2b/0xf0 lib/usercopy.c:14 copy_from_user include/linux/uaccess.h:183 [inline] do_sys_poll+0x1d3/0xde0 fs/select.c:997 __do_sys_ppoll fs/select.c:1121 [inline] __se_sys_ppoll fs/select.c:1101 [inline] __x64_sys_ppoll+0x256/0x2d0 fs/select.c:1101 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x38/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x7f5a9bb19ad5 Code: 85 d2 74 0d 0f 10 02 48 8d 54 24 20 0f 11 44 24 20 64 8b 04 25 18 00 00 00 85 c0 75 27 41 b8 08 00 00 00 b8 0f 01 00 00 0f 05 <48> 3d 00 f0 ff ff 76 75 48 8b 15 24 73 0d 00 f7 d8 64 89 02 48 83 RSP: 002b:00007fff44a07f80 EFLAGS: 00000246 ORIG_RAX: 000000000000010f RAX: ffffffffffffffda RBX: 00000000000668a0 RCX: 00007f5a9bb19ad5 RDX: 00007fff44a07fa0 RSI: 0000000000000004 RDI: 0000564a8ac96ab0 RBP: 0000564a8ac95570 R08: 0000000000000008 R09: 0000000000000000 R10: 00007fff44a08088 R11: 0000000000000246 R12: 0000564a891faaa4 R13: 0000000000000001 R14: 0000564a891fb3e8 R15: 00007fff44a08008 ---------------- Code disassembly (best guess): 0: 7e 83 jle 0xffffff85 2: f8 clc 3: 01 0f add %ecx,(%rdi) 5: 85 dd test %ebx,%ebp 7: 01 00 add %eax,(%rax) 9: 00 9c 58 f6 c4 02 0f add %bl,0xf02c4f6(%rax,%rbx,2) 10: 85 c8 test %ecx,%eax 12: 01 00 add %eax,(%rax) 14: 00 48 f7 add %cl,-0x9(%rax) 17: 04 24 add $0x24,%al 19: 00 02 add %al,(%rdx) 1b: 00 00 add %al,(%rax) 1d: 74 01 je 0x20 1f: fb sti 20: 48 b8 00 00 00 00 00 movabs $0xdffffc0000000000,%rax 27: fc ff df * 2a: 48 01 c5 add %rax,%rbp <-- trapping instruction 2d: 48 c7 45 00 00 00 00 movq $0x0,0x0(%rbp) 34: 00 35: c7 45 08 00 00 00 00 movl $0x0,0x8(%rbp) 3c: 48 rex.W 3d: 8b .byte 0x8b 3e: 84 .byte 0x84 3f: 24 .byte 0x24