IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready IPv6: ADDRCONF(NETDEV_UP): team0: link is not ready 8021q: adding VLAN 0 to HW filter on device team0 ====================================================== IPv6: ADDRCONF(NETDEV_UP): vxcan1: link is not ready WARNING: possible circular locking dependency detected 4.14.169-syzkaller #0 Not tainted ------------------------------------------------------ syz-executor.5/6828 is trying to acquire lock: (&cpuctx_mutex/1){+.+.}, at: [] mutex_lock_double kernel/events/core.c:9907 [inline] (&cpuctx_mutex/1){+.+.}, at: [] __perf_event_ctx_lock_double kernel/events/core.c:9966 [inline] (&cpuctx_mutex/1){+.+.}, at: [] SYSC_perf_event_open+0x110d/0x21b0 kernel/events/core.c:10228 but task is already holding lock: (&cpuctx_mutex){+.+.}, at: [] mutex_lock_double kernel/events/core.c:9906 [inline] (&cpuctx_mutex){+.+.}, at: [] __perf_event_ctx_lock_double kernel/events/core.c:9966 [inline] (&cpuctx_mutex){+.+.}, at: [] SYSC_perf_event_open+0x10fc/0x21b0 kernel/events/core.c:10228 which lock already depends on the new lock. the existing dependency chain (in reverse order) is: -> #5 (&cpuctx_mutex){+.+.}: 8021q: adding VLAN 0 to HW filter on device bond0 lock_acquire+0x173/0x400 kernel/locking/lockdep.c:3994 __mutex_lock_common kernel/locking/mutex.c:756 [inline] __mutex_lock+0xef/0x14c0 kernel/locking/mutex.c:893 mutex_lock_nested+0x16/0x20 kernel/locking/mutex.c:908 perf_event_init_cpu+0xb6/0x160 kernel/events/core.c:11226 perf_event_init+0x2cd/0x301 kernel/events/core.c:11273 start_kernel+0x365/0x642 init/main.c:620 x86_64_start_reservations+0x29/0x2b arch/x86/kernel/head64.c:399 x86_64_start_kernel+0x76/0x79 arch/x86/kernel/head64.c:380 IPv6: ADDRCONF(NETDEV_UP): veth0: link is not ready secondary_startup_64+0xa5/0xb0 arch/x86/kernel/head_64.S:240 -> #4 (pmus_lock){+.+.}: lock_acquire+0x173/0x400 kernel/locking/lockdep.c:3994 __mutex_lock_common kernel/locking/mutex.c:756 [inline] __mutex_lock+0xef/0x14c0 kernel/locking/mutex.c:893 mutex_lock_nested+0x16/0x20 kernel/locking/mutex.c:908 perf_event_init_cpu+0x2a/0x160 kernel/events/core.c:11220 cpuhp_invoke_callback+0x191/0x1610 kernel/cpu.c:184 IPv6: ADDRCONF(NETDEV_UP): veth1: link is not ready cpuhp_up_callbacks kernel/cpu.c:573 [inline] _cpu_up+0x21e/0x540 kernel/cpu.c:1135 do_cpu_up+0xf1/0x110 kernel/cpu.c:1170 cpu_up+0xe/0x10 kernel/cpu.c:1178 smp_init+0x69/0x10c kernel/smp.c:578 kernel_init_freeable+0x2d2/0x4ae init/main.c:1066 kernel_init+0xc/0x105 init/main.c:998 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:404 -> #3 IPv6: ADDRCONF(NETDEV_UP): team0: link is not ready (cpu_hotplug_lock.rw_sem){++++}: lock_acquire+0x173/0x400 kernel/locking/lockdep.c:3994 percpu_down_read_preempt_disable include/linux/percpu-rwsem.h:36 [inline] percpu_down_read include/linux/percpu-rwsem.h:59 [inline] cpus_read_lock+0x38/0xa0 kernel/cpu.c:295 static_key_slow_inc+0xd/0x20 kernel/jump_label.c:123 tracepoint_add_func kernel/tracepoint.c:223 [inline] tracepoint_probe_register_prio+0x4de/0x6e0 kernel/tracepoint.c:283 tracepoint_probe_register+0xe/0x10 kernel/tracepoint.c:304 trace_event_reg+0x14d/0x340 kernel/trace/trace_events.c:305 perf_trace_event_reg kernel/trace/trace_event_perf.c:122 [inline] perf_trace_event_init kernel/trace/trace_event_perf.c:197 [inline] perf_trace_init+0x3ce/0x9d0 kernel/trace/trace_event_perf.c:221 8021q: adding VLAN 0 to HW filter on device team0 perf_tp_event_init+0x68/0xd0 kernel/events/core.c:8109 perf_try_init_event+0x138/0x1c0 kernel/events/core.c:9345 perf_init_event kernel/events/core.c:9383 [inline] perf_event_alloc+0xe0b/0x2220 kernel/events/core.c:9643 SYSC_perf_event_open+0x447/0x21b0 kernel/events/core.c:10100 SyS_perf_event_open+0x9/0x10 kernel/events/core.c:9986 do_syscall_64+0x1c7/0x5b0 arch/x86/entry/common.c:292 entry_SYSCALL_64_after_hwframe+0x42/0xb7 -> #2 IPv6: ADDRCONF(NETDEV_UP): veth0_to_bridge: link is not ready (tracepoints_mutex){+.+.}: lock_acquire+0x173/0x400 kernel/locking/lockdep.c:3994 __mutex_lock_common kernel/locking/mutex.c:756 [inline] __mutex_lock+0xef/0x14c0 kernel/locking/mutex.c:893 mutex_lock_nested+0x16/0x20 kernel/locking/mutex.c:908 tracepoint_probe_register_prio+0x30/0x6e0 kernel/tracepoint.c:279 tracepoint_probe_register+0xe/0x10 kernel/tracepoint.c:304 trace_event_reg+0x14d/0x340 kernel/trace/trace_events.c:305 perf_trace_event_reg kernel/trace/trace_event_perf.c:122 [inline] perf_trace_event_init kernel/trace/trace_event_perf.c:197 [inline] perf_trace_init+0x3ce/0x9d0 kernel/trace/trace_event_perf.c:221 IPv6: ADDRCONF(NETDEV_UP): veth1_to_bridge: link is not ready perf_tp_event_init+0x68/0xd0 kernel/events/core.c:8109 perf_try_init_event+0x138/0x1c0 kernel/events/core.c:9345 perf_init_event kernel/events/core.c:9383 [inline] perf_event_alloc+0xe0b/0x2220 kernel/events/core.c:9643 SYSC_perf_event_open+0x447/0x21b0 kernel/events/core.c:10100 SyS_perf_event_open+0x9/0x10 kernel/events/core.c:9986 do_syscall_64+0x1c7/0x5b0 arch/x86/entry/common.c:292 IPv6: ADDRCONF(NETDEV_UP): veth0_to_bond: link is not ready entry_SYSCALL_64_after_hwframe+0x42/0xb7 IPv6: ADDRCONF(NETDEV_UP): veth1_to_bond: link is not ready -> #1 IPv6: ADDRCONF(NETDEV_UP): veth0_to_team: link is not ready (event_mutex){+.+.}: lock_acquire+0x173/0x400 kernel/locking/lockdep.c:3994 __mutex_lock_common kernel/locking/mutex.c:756 [inline] __mutex_lock+0xef/0x14c0 kernel/locking/mutex.c:893 mutex_lock_nested+0x16/0x20 kernel/locking/mutex.c:908 perf_trace_init+0x50/0x9d0 kernel/trace/trace_event_perf.c:216 perf_tp_event_init+0x68/0xd0 kernel/events/core.c:8109 perf_try_init_event+0xcf/0x1c0 kernel/events/core.c:9345 IPv6: ADDRCONF(NETDEV_UP): veth1_to_team: link is not ready perf_init_event kernel/events/core.c:9383 [inline] perf_event_alloc+0xe0b/0x2220 kernel/events/core.c:9643 SYSC_perf_event_open+0x447/0x21b0 kernel/events/core.c:10100 SyS_perf_event_open+0x9/0x10 kernel/events/core.c:9986 do_syscall_64+0x1c7/0x5b0 arch/x86/entry/common.c:292 entry_SYSCALL_64_after_hwframe+0x42/0xb7 -> #0 ( IPv6: ADDRCONF(NETDEV_UP): veth0_to_hsr: link is not ready &cpuctx_mutex IPv6: ADDRCONF(NETDEV_UP): veth1_to_hsr: link is not ready /1 hsr0: Slave A (hsr_slave_0) is not up; please bring it up to get a fully working HSR network ){+.+.} hsr0: Slave B (hsr_slave_1) is not up; please bring it up to get a fully working HSR network : IPv6: ADDRCONF(NETDEV_UP): hsr0: link is not ready check_prev_add kernel/locking/lockdep.c:1901 [inline] check_prevs_add kernel/locking/lockdep.c:2018 [inline] validate_chain kernel/locking/lockdep.c:2460 [inline] __lock_acquire+0x2e94/0x4500 kernel/locking/lockdep.c:3487 IPv6: ADDRCONF(NETDEV_UP): vxcan1: link is not ready lock_acquire+0x173/0x400 kernel/locking/lockdep.c:3994 8021q: adding VLAN 0 to HW filter on device batadv0 __mutex_lock_common kernel/locking/mutex.c:756 [inline] __mutex_lock+0xef/0x14c0 kernel/locking/mutex.c:893 mutex_lock_nested+0x16/0x20 kernel/locking/mutex.c:908 mutex_lock_double kernel/events/core.c:9907 [inline] __perf_event_ctx_lock_double kernel/events/core.c:9966 [inline] SYSC_perf_event_open+0x110d/0x21b0 kernel/events/core.c:10228 SyS_perf_event_open+0x9/0x10 kernel/events/core.c:9986 do_syscall_64+0x1c7/0x5b0 arch/x86/entry/common.c:292 entry_SYSCALL_64_after_hwframe+0x42/0xb7 other info that might help us debug this: Chain exists of: &cpuctx_mutex/1 --> pmus_lock --> &cpuctx_mutex Possible unsafe locking scenario: CPU0 CPU1 ---- ---- lock(&cpuctx_mutex); lock(pmus_lock); lock(&cpuctx_mutex); lock(&cpuctx_mutex/1); *** DEADLOCK *** 1 lock held by syz-executor.5/6828: #0: (&cpuctx_mutex){+.+.}, at: [] mutex_lock_double kernel/events/core.c:9906 [inline] #0: (&cpuctx_mutex){+.+.}, at: [] __perf_event_ctx_lock_double kernel/events/core.c:9966 [inline] #0: (&cpuctx_mutex){+.+.}, at: [] SYSC_perf_event_open+0x10fc/0x21b0 kernel/events/core.c:10228 stack backtrace: CPU: 0 PID: 6828 Comm: syz-executor.5 Not tainted 4.14.169-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:17 [inline] dump_stack+0xf7/0x13b lib/dump_stack.c:58 print_circular_bug.isra.40.cold.67+0x1bd/0x27d kernel/locking/lockdep.c:1258 check_prev_add kernel/locking/lockdep.c:1901 [inline] check_prevs_add kernel/locking/lockdep.c:2018 [inline] validate_chain kernel/locking/lockdep.c:2460 [inline] __lock_acquire+0x2e94/0x4500 kernel/locking/lockdep.c:3487 lock_acquire+0x173/0x400 kernel/locking/lockdep.c:3994 __mutex_lock_common kernel/locking/mutex.c:756 [inline] __mutex_lock+0xef/0x14c0 kernel/locking/mutex.c:893 mutex_lock_nested+0x16/0x20 kernel/locking/mutex.c:908 mutex_lock_double kernel/events/core.c:9907 [inline] __perf_event_ctx_lock_double kernel/events/core.c:9966 [inline] SYSC_perf_event_open+0x110d/0x21b0 kernel/events/core.c:10228 SyS_perf_event_open+0x9/0x10 kernel/events/core.c:9986 do_syscall_64+0x1c7/0x5b0 arch/x86/entry/common.c:292 entry_SYSCALL_64_after_hwframe+0x42/0xb7 RIP: 0033:0x4592c9 RSP: 002b:00007f25403cec78 EFLAGS: 00000246 ORIG_RAX: 000000000000012a RAX: ffffffffffffffda RBX: 0000000000000005 RCX: 00000000004592c9 RDX: 0000000000000000 RSI: ffffffffffffffff RDI: 0000000020000200 RBP: 000000000075bf20 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000004 R11: 0000000000000246 R12: 00007f25403cf6d4 R13: 00000000004c5f2a R14: 00000000004da8c8 R15: 00000000ffffffff IPv6: ADDRCONF(NETDEV_UP): bridge0: link is not ready IPv6: ADDRCONF(NETDEV_CHANGE): veth1: link becomes ready IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bridge: link becomes ready IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready bridge0: port 1(bridge_slave_0) entered blocking state bridge0: port 1(bridge_slave_0) entered forwarding state IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bridge: link becomes ready IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready bridge0: port 2(bridge_slave_1) entered blocking state bridge0: port 2(bridge_slave_1) entered forwarding state IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bond: link becomes ready IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bond: link becomes ready IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_team: link becomes ready IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_team: link becomes ready IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_hsr: link becomes ready IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_hsr: link becomes ready IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready IPv6: ADDRCONF(NETDEV_CHANGE): bridge0: link becomes ready IPv6: ADDRCONF(NETDEV_CHANGE): team0: link becomes ready IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready 8021q: adding VLAN 0 to HW filter on device batadv0 IPv6: ADDRCONF(NETDEV_UP): veth0_to_bridge: link is not ready IPv6: ADDRCONF(NETDEV_UP): veth1_to_bridge: link is not ready IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bridge: link becomes ready IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready bridge0: port 1(bridge_slave_0) entered blocking state bridge0: port 1(bridge_slave_0) entered forwarding state IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bridge: link becomes ready IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready bridge0: port 2(bridge_slave_1) entered blocking state bridge0: port 2(bridge_slave_1) entered forwarding state IPv6: ADDRCONF(NETDEV_CHANGE): bridge0: link becomes ready 8021q: adding VLAN 0 to HW filter on device bond0 IPv6: ADDRCONF(NETDEV_UP): veth0_to_bond: link is not ready IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bond: link becomes ready IPv6: ADDRCONF(NETDEV_UP): veth0: link is not ready IPv6: ADDRCONF(NETDEV_UP): veth1_to_bond: link is not ready IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bond: link becomes ready IPv6: ADDRCONF(NETDEV_UP): veth1: link is not ready IPv6: ADDRCONF(NETDEV_UP): team0: link is not ready 8021q: adding VLAN 0 to HW filter on device team0 IPv6: ADDRCONF(NETDEV_CHANGE): veth1: link becomes ready IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready IPv6: ADDRCONF(NETDEV_UP): veth0_to_team: link is not ready IPv6: ADDRCONF(NETDEV_UP): veth0_to_bridge: link is not ready IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_team: link becomes ready IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bridge: link becomes ready IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready bridge0: port 1(bridge_slave_0) entered blocking state bridge0: port 1(bridge_slave_0) entered forwarding state IPv6: ADDRCONF(NETDEV_CHANGE): team0: link becomes ready IPv6: ADDRCONF(NETDEV_CHANGE): bridge0: link becomes ready IPv6: ADDRCONF(NETDEV_UP): veth1_to_team: link is not ready IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_team: link becomes ready IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready IPv6: ADDRCONF(NETDEV_UP): veth1_to_bridge: link is not ready IPv6: ADDRCONF(NETDEV_UP): veth0_to_hsr: link is not ready IPv6: ADDRCONF(NETDEV_UP): veth1_to_hsr: link is not ready IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bridge: link becomes ready IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready bridge0: port 2(bridge_slave_1) entered blocking state bridge0: port 2(bridge_slave_1) entered forwarding state IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_hsr: link becomes ready IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_hsr: link becomes ready IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready IPv6: ADDRCONF(NETDEV_UP): veth0_to_bond: link is not ready IPv6: ADDRCONF(NETDEV_UP): veth1_to_bond: link is not ready IPv6: ADDRCONF(NETDEV_UP): veth0_to_team: link is not ready IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bond: link becomes ready IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bond: link becomes ready IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_team: link becomes ready IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready IPv6: ADDRCONF(NETDEV_CHANGE): team0: link becomes ready IPv6: ADDRCONF(NETDEV_UP): hsr0: link is not ready IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready IPv6: ADDRCONF(NETDEV_UP): veth1_to_team: link is not ready IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_team: link becomes ready IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready IPv6: ADDRCONF(NETDEV_UP): veth0_to_hsr: link is not ready IPv6: ADDRCONF(NETDEV_UP): vxcan1: link is not ready IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_hsr: link becomes ready IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready IPv6: ADDRCONF(NETDEV_UP): veth1_to_hsr: link is not ready IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_hsr: link becomes ready IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready 8021q: adding VLAN 0 to HW filter on device batadv0 IPv6: ADDRCONF(NETDEV_UP): hsr0: link is not ready IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready IPv6: ADDRCONF(NETDEV_UP): vxcan1: link is not ready 8021q: adding VLAN 0 to HW filter on device batadv0