bisecting fixing commit since b98aebd298246df37b472c52a2ee1023256d02e3 building syzkaller on 5ea87a6638e52a94361b26b8576a1605585815fb testing commit b98aebd298246df37b472c52a2ee1023256d02e3 with gcc (GCC) 8.4.1 20210217 kernel signature: 65b67614df480d2ee5d2b335aa674e079c1a65269237503cb739f30cc30a7c06 run #0: crashed: possible deadlock in perf_event_release_kernel run #1: crashed: possible deadlock in perf_read run #2: crashed: possible deadlock in perf_read run #3: crashed: possible deadlock in perf_event_release_kernel run #4: crashed: possible deadlock in perf_read run #5: crashed: possible deadlock in perf_event_release_kernel run #6: crashed: possible deadlock in perf_event_release_kernel run #7: crashed: possible deadlock in perf_event_release_kernel run #8: crashed: possible deadlock in perf_event_release_kernel run #9: crashed: possible deadlock in perf_event_release_kernel run #10: crashed: possible deadlock in perf_read run #11: crashed: possible deadlock in perf_event_release_kernel run #12: crashed: possible deadlock in perf_read run #13: crashed: possible deadlock in perf_event_release_kernel run #14: crashed: possible deadlock in perf_event_release_kernel run #15: crashed: possible deadlock in perf_read run #16: crashed: possible deadlock in perf_event_release_kernel run #17: crashed: possible deadlock in perf_event_release_kernel run #18: crashed: possible deadlock in perf_event_release_kernel run #19: crashed: possible deadlock in perf_event_release_kernel testing current HEAD c7150cd2fa8c831c8a2ddd27bce3ac2a3372c93d testing commit c7150cd2fa8c831c8a2ddd27bce3ac2a3372c93d with gcc (GCC) 8.4.1 20210217 kernel signature: 342355d2d09f7fd9735fd01cb715d5397f68d59f98744cb0372ee3789f9982c5 run #0: crashed: possible deadlock in perf_event_release_kernel run #1: crashed: possible deadlock in perf_event_release_kernel run #2: crashed: possible deadlock in perf_read run #3: crashed: possible deadlock in perf_event_release_kernel run #4: crashed: possible deadlock in perf_event_release_kernel run #5: crashed: possible deadlock in perf_read run #6: crashed: possible deadlock in perf_event_release_kernel run #7: crashed: possible deadlock in perf_event_release_kernel run #8: crashed: possible deadlock in perf_event_release_kernel run #9: crashed: possible deadlock in perf_read revisions tested: 2, total time: 21m36.282632108s (build: 14m52.419002946s, test: 5m58.878326765s) the crash still happens on HEAD commit msg: Linux 4.14.225 crash: possible deadlock in perf_read IPv6: ADDRCONF(NETDEV_CHANGE): team0: link becomes ready IPv6: ADDRCONF(NETDEV_UP): veth0_to_team: link is not ready IPv6: ADDRCONF(NETDEV_UP): veth1_to_team: link is not ready device hsr_slave_0 entered promiscuous mode ====================================================== WARNING: possible circular locking dependency detected 4.14.225-syzkaller #0 Not tainted ------------------------------------------------------ syz-executor.2/6423 is trying to acquire lock: (&event->child_mutex){+.+.}, at: [] perf_read_group kernel/events/core.c:4542 [inline] (&event->child_mutex){+.+.}, at: [] __perf_read kernel/events/core.c:4624 [inline] (&event->child_mutex){+.+.}, at: [] perf_read+0x2aa/0x860 kernel/events/core.c:4639 but task is already holding lock: (&cpuctx_mutex){+.+.}, at: [] perf_event_ctx_lock_nested+0x109/0x250 kernel/events/core.c:1241 which lock already depends on the new lock. the existing dependency chain (in reverse order) is: -> #5 (&cpuctx_mutex){+.+.}: lock_acquire+0x173/0x400 kernel/locking/lockdep.c:3998 __mutex_lock_common kernel/locking/mutex.c:756 [inline] __mutex_lock+0xef/0x14b0 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:11250 perf_event_init+0x2c9/0x2fd kernel/events/core.c:11297 start_kernel+0x363/0x525 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 secondary_startup_64+0xa5/0xb0 arch/x86/kernel/head_64.S:240 -> #4 (pmus_lock){+.+.}: lock_acquire+0x173/0x400 kernel/locking/lockdep.c:3998 __mutex_lock_common kernel/locking/mutex.c:756 [inline] __mutex_lock+0xef/0x14b0 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:11244 cpuhp_invoke_callback+0x191/0x1610 kernel/cpu.c:184 cpuhp_up_callbacks kernel/cpu.c:572 [inline] _cpu_up+0x21e/0x540 kernel/cpu.c:1144 do_cpu_up+0xf1/0x110 kernel/cpu.c:1179 cpu_up+0xe/0x10 kernel/cpu.c:1187 smp_init+0x69/0x10c kernel/smp.c:578 kernel_init_freeable+0x2d2/0x4b6 init/main.c:1068 kernel_init+0xc/0x105 init/main.c:1000 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:404 -> #3 (cpu_hotplug_lock.rw_sem){++++}: lock_acquire+0x173/0x400 kernel/locking/lockdep.c:3998 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:269 [inline] tracepoint_probe_register_prio+0x681/0x9b0 kernel/tracepoint.c:331 tracepoint_probe_register+0xe/0x10 kernel/tracepoint.c:352 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 perf_tp_event_init+0x68/0xd0 kernel/events/core.c:8138 perf_try_init_event+0x138/0x1c0 kernel/events/core.c:9369 perf_init_event kernel/events/core.c:9407 [inline] perf_event_alloc+0xe0f/0x2350 kernel/events/core.c:9667 SYSC_perf_event_open+0x447/0x21b0 kernel/events/core.c:10124 SyS_perf_event_open+0x9/0x10 kernel/events/core.c:10010 do_syscall_64+0x1c7/0x5b0 arch/x86/entry/common.c:292 entry_SYSCALL_64_after_hwframe+0x46/0xbb -> #2 (tracepoints_mutex){+.+.}: lock_acquire+0x173/0x400 kernel/locking/lockdep.c:3998 __mutex_lock_common kernel/locking/mutex.c:756 [inline] __mutex_lock+0xef/0x14b0 kernel/locking/mutex.c:893 mutex_lock_nested+0x16/0x20 kernel/locking/mutex.c:908 tracepoint_probe_register_prio+0x31/0x9b0 kernel/tracepoint.c:327 tracepoint_probe_register+0xe/0x10 kernel/tracepoint.c:352 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 perf_tp_event_init+0x68/0xd0 kernel/events/core.c:8138 perf_try_init_event+0x138/0x1c0 kernel/events/core.c:9369 perf_init_event kernel/events/core.c:9407 [inline] perf_event_alloc+0xe0f/0x2350 kernel/events/core.c:9667 SYSC_perf_event_open+0x447/0x21b0 kernel/events/core.c:10124 SyS_perf_event_open+0x9/0x10 kernel/events/core.c:10010 do_syscall_64+0x1c7/0x5b0 arch/x86/entry/common.c:292 entry_SYSCALL_64_after_hwframe+0x46/0xbb -> #1 (event_mutex){+.+.}: lock_acquire+0x173/0x400 kernel/locking/lockdep.c:3998 __mutex_lock_common kernel/locking/mutex.c:756 [inline] __mutex_lock+0xef/0x14b0 kernel/locking/mutex.c:893 mutex_lock_nested+0x16/0x20 kernel/locking/mutex.c:908 perf_trace_destroy+0x1c/0x100 kernel/trace/trace_event_perf.c:234 tp_perf_event_destroy+0x9/0x10 kernel/events/core.c:8122 _free_event+0x2e9/0xd50 kernel/events/core.c:4244 free_event+0x27/0x30 kernel/events/core.c:4271 perf_event_release_kernel+0x311/0x7b0 kernel/events/core.c:4415 perf_release+0x32/0x50 kernel/events/core.c:4441 __fput+0x232/0x750 fs/file_table.c:210 ____fput+0x9/0x10 fs/file_table.c:244 task_work_run+0xe5/0x170 kernel/task_work.c:113 tracehook_notify_resume include/linux/tracehook.h:191 [inline] exit_to_usermode_loop+0x16a/0x1b0 arch/x86/entry/common.c:164 prepare_exit_to_usermode arch/x86/entry/common.c:199 [inline] syscall_return_slowpath arch/x86/entry/common.c:270 [inline] do_syscall_64+0x416/0x5b0 arch/x86/entry/common.c:297 entry_SYSCALL_64_after_hwframe+0x46/0xbb -> #0 (&event->child_mutex){+.+.}: check_prev_add kernel/locking/lockdep.c:1905 [inline] check_prevs_add kernel/locking/lockdep.c:2022 [inline] validate_chain kernel/locking/lockdep.c:2464 [inline] __lock_acquire+0x2e96/0x4500 kernel/locking/lockdep.c:3491 lock_acquire+0x173/0x400 kernel/locking/lockdep.c:3998 __mutex_lock_common kernel/locking/mutex.c:756 [inline] __mutex_lock+0xef/0x14b0 kernel/locking/mutex.c:893 mutex_lock_nested+0x16/0x20 kernel/locking/mutex.c:908 perf_read_group kernel/events/core.c:4542 [inline] __perf_read kernel/events/core.c:4624 [inline] perf_read+0x2aa/0x860 kernel/events/core.c:4639 do_loop_readv_writev fs/read_write.c:695 [inline] do_loop_readv_writev fs/read_write.c:682 [inline] do_iter_read+0x361/0x590 fs/read_write.c:919 vfs_readv+0xb6/0x110 fs/read_write.c:981 do_readv+0x10d/0x320 fs/read_write.c:1014 SYSC_readv fs/read_write.c:1101 [inline] SyS_readv+0xb/0x10 fs/read_write.c:1098 do_syscall_64+0x1c7/0x5b0 arch/x86/entry/common.c:292 entry_SYSCALL_64_after_hwframe+0x46/0xbb other info that might help us debug this: Chain exists of: &event->child_mutex --> pmus_lock --> &cpuctx_mutex Possible unsafe locking scenario: CPU0 CPU1 ---- ---- lock(&cpuctx_mutex); lock(pmus_lock); lock(&cpuctx_mutex); lock(&event->child_mutex); *** DEADLOCK *** 1 lock held by syz-executor.2/6423: #0: (&cpuctx_mutex){+.+.}, at: [] perf_event_ctx_lock_nested+0x109/0x250 kernel/events/core.c:1241 stack backtrace: CPU: 1 PID: 6423 Comm: syz-executor.2 Not tainted 4.14.225-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+0xf7/0x137 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:1905 [inline] check_prevs_add kernel/locking/lockdep.c:2022 [inline] validate_chain kernel/locking/lockdep.c:2464 [inline] __lock_acquire+0x2e96/0x4500 kernel/locking/lockdep.c:3491 lock_acquire+0x173/0x400 kernel/locking/lockdep.c:3998 __mutex_lock_common kernel/locking/mutex.c:756 [inline] __mutex_lock+0xef/0x14b0 kernel/locking/mutex.c:893 mutex_lock_nested+0x16/0x20 kernel/locking/mutex.c:908 perf_read_group kernel/events/core.c:4542 [inline] __perf_read kernel/events/core.c:4624 [inline] perf_read+0x2aa/0x860 kernel/events/core.c:4639 do_loop_readv_writev fs/read_write.c:695 [inline] do_loop_readv_writev fs/read_write.c:682 [inline] do_iter_read+0x361/0x590 fs/read_write.c:919 vfs_readv+0xb6/0x110 fs/read_write.c:981 do_readv+0x10d/0x320 fs/read_write.c:1014 SYSC_readv fs/read_write.c:1101 [inline] SyS_readv+0xb/0x10 fs/read_write.c:1098 do_syscall_64+0x1c7/0x5b0 arch/x86/entry/common.c:292 entry_SYSCALL_64_after_hwframe+0x46/0xbb RIP: 0033:0x461989 RSP: 002b:00007f60fb7151a8 EFLAGS: 00000246 ORIG_RAX: 0000000000000013 RAX: ffffffffffffffda RBX: 000000000052bf00 RCX: 0000000000461989 RDX: 0000000000000001 RSI: 0000000020000200 RDI: 0000000000000004 RBP: 0000000000000003 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff R13: 00000000004f5ab0 R14: 00000000004b2bd4 R15: 00007f60fb7156bc device hsr_slave_1 entered promiscuous mode IPv6: ADDRCONF(NETDEV_UP): veth0: link is not ready IPv6: ADDRCONF(NETDEV_UP): veth1: 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): veth1_to_team: link becomes ready IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready IPv6: ADDRCONF(NETDEV_CHANGE): veth1: link becomes ready IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready IPv6: ADDRCONF(NETDEV_CHANGE): team0: link becomes ready IPv6: ADDRCONF(NETDEV_UP): veth1_to_team: link is not ready IPv6: ADDRCONF(NETDEV_UP): hsr_slave_0: link is not ready IPv6: ADDRCONF(NETDEV_UP): veth1_to_team: 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_UP): veth0_to_hsr: 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_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_UP): veth0_to_hsr: link is not ready IPv6: ADDRCONF(NETDEV_UP): hsr_slave_1: 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): veth0_to_hsr: link becomes ready IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: 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_UP): veth1_to_hsr: link is not ready IPv6: ADDRCONF(NETDEV_UP): veth0_to_bridge: link is not ready IPv6: ADDRCONF(NETDEV_UP): veth1_to_hsr: link is not ready IPv6: ADDRCONF(NETDEV_UP): hsr0: link is not ready IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: 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): 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_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_UP): hsr0: link is not ready IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready IPv6: ADDRCONF(NETDEV_UP): veth1_to_bridge: link is not ready IPv6: ADDRCONF(NETDEV_UP): vxcan1: 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_UP): hsr0: link is not ready IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready IPv6: ADDRCONF(NETDEV_UP): bridge0: link is not ready 8021q: adding VLAN 0 to HW filter on device batadv0 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_CHANGE): veth0_to_bond: link becomes ready IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bond: link becomes ready IPv6: ADDRCONF(NETDEV_UP): vxcan1: link is not ready IPv6: ADDRCONF(NETDEV_UP): vxcan1: link is not ready IPv6: ADDRCONF(NETDEV_UP): veth0_to_team: link is not ready 8021q: adding VLAN 0 to HW filter on device batadv0 8021q: adding VLAN 0 to HW filter on device batadv0 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): veth1_to_team: link is not ready 8021q: adding VLAN 0 to HW filter on device bond0 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): veth0: 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_UP): veth1: link is not 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): veth1: link becomes ready IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready IPv6: ADDRCONF(NETDEV_UP): hsr0: link is not ready IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: 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): veth0_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_UP): veth1_to_bridge: link is not ready IPv6: ADDRCONF(NETDEV_UP): vxcan1: link is not ready IPv6: ADDRCONF(NETDEV_CHANGE): bridge0: link becomes 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_UP): veth0_to_bond: link is not ready IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bond: link becomes ready IPv6: ADDRCONF(NETDEV_UP): veth1_to_bond: link is not ready 8021q: adding VLAN 0 to HW filter on device batadv0 IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bond: link becomes ready IPv6: ADDRCONF(NETDEV_UP): veth0_to_team: 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): team0: 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): veth1_to_hsr: 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_CHANGE): veth1_to_hsr: link becomes ready IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready 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