bridge0: received packet on bridge_slave_0 with own address as source address (addr:aa:aa:aa:aa:aa:0c, vlan:0) rcu: INFO: rcu_preempt detected stalls on CPUs/tasks: rcu: Tasks blocked on level-0 rcu_node (CPUs 0-1): P6204/1:b..l rcu: (detected by 1, t=10503 jiffies, g=9209, q=481 ncpus=2) task:syz.3.77 state:R running task stack:27352 pid:6204 tgid:6204 ppid:5810 task_flags:0x40004c flags:0x00004002 Call Trace: context_switch kernel/sched/core.c:5382 [inline] __schedule+0x116f/0x5de0 kernel/sched/core.c:6767 preempt_schedule_irq+0x51/0x90 kernel/sched/core.c:7090 irqentry_exit+0x36/0x90 kernel/entry/common.c:354 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702 RIP: 0010:lock_acquire+0x62/0x350 kernel/locking/lockdep.c:5870 Code: e9 0b 12 83 f8 07 0f 87 bc 02 00 00 89 c0 48 0f a3 05 02 d9 ec 0e 0f 82 74 02 00 00 8b 35 9a 08 ed 0e 85 f6 0f 85 8d 00 00 00 <48> 8b 44 24 30 65 48 2b 05 d9 e8 0b 12 0f 85 c7 02 00 00 48 83 c4 RSP: 0018:ffffc9000c1374b8 EFLAGS: 00000206 RAX: 0000000000000046 RBX: ffffffff8e3bfc00 RCX: 000000009b5bf4c5 RDX: 0000000000000000 RSI: ffffffff8dbbd30b RDI: ffffffff8bf48aa0 RBP: 0000000000000002 R08: b7804c955127d9b7 R09: 0000000000000000 R10: 0000000000000003 R11: 0000000000000000 R12: 0000000000000000 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 rcu_lock_acquire include/linux/rcupdate.h:331 [inline] rcu_read_lock include/linux/rcupdate.h:841 [inline] class_rcu_constructor include/linux/rcupdate.h:1155 [inline] unwind_next_frame+0xd1/0x20a0 arch/x86/kernel/unwind_orc.c:479 arch_stack_walk+0x94/0x100 arch/x86/kernel/stacktrace.c:25 stack_trace_save+0x8e/0xc0 kernel/stacktrace.c:122 save_stack+0x160/0x1f0 mm/page_owner.c:156 __reset_page_owner+0x84/0x1a0 mm/page_owner.c:308 reset_page_owner include/linux/page_owner.h:25 [inline] free_pages_prepare mm/page_alloc.c:1262 [inline] __free_frozen_pages+0x69d/0xff0 mm/page_alloc.c:2725 discard_slab mm/slub.c:2716 [inline] __put_partials+0x16d/0x1c0 mm/slub.c:3185 qlink_free mm/kasan/quarantine.c:163 [inline] qlist_free_all+0x4e/0x120 mm/kasan/quarantine.c:179 kasan_quarantine_reduce+0x195/0x1e0 mm/kasan/quarantine.c:286 __kasan_kmalloc+0x8a/0xb0 mm/kasan/common.c:385 kmalloc_noprof include/linux/slab.h:905 [inline] kzalloc_noprof include/linux/slab.h:1039 [inline] snd_seq_port_connect+0x61/0x550 sound/core/seq/seq_ports.c:585 snd_seq_ioctl_subscribe_port+0x211/0x450 sound/core/seq/seq_clientmgr.c:1537 snd_seq_kernel_client_ctl+0x107/0x1c0 sound/core/seq/seq_clientmgr.c:2570 snd_seq_oss_midi_open+0x442/0x660 sound/core/seq/oss/seq_oss_midi.c:369 snd_seq_oss_synth_reset+0x437/0x880 sound/core/seq/oss/seq_oss_synth.c:396 snd_seq_oss_reset+0x73/0x290 sound/core/seq/oss/seq_oss_init.c:430 snd_seq_oss_release+0x7c/0x180 sound/core/seq/oss/seq_oss_init.c:407 odev_release+0x4c/0x70 sound/core/seq/oss/seq_oss.c:144 __fput+0x402/0xb70 fs/file_table.c:465 task_work_run+0x150/0x240 kernel/task_work.c:227 exit_task_work include/linux/task_work.h:40 [inline] do_exit+0xafb/0x2c30 kernel/exit.c:953 __do_sys_exit kernel/exit.c:1069 [inline] __se_sys_exit kernel/exit.c:1067 [inline] __x64_sys_exit+0x42/0x50 kernel/exit.c:1067 x64_sys_call+0xea3/0x1730 arch/x86/include/generated/asm/syscalls_64.h:61 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xcd/0x260 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7efe0e58e969 RSP: 002b:00007efe0f418fe8 EFLAGS: 00000246 ORIG_RAX: 000000000000003c RAX: ffffffffffffffda RBX: 00007efe0e7b5fa0 RCX: 00007efe0e58e969 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000 RBP: 00007efe0e610ab1 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 00007efe0e7b5fa0 R15: 00007ffee2076318 bridge0: received packet on veth0_to_bridge with own address as source address (addr:aa:aa:aa:aa:aa:0c, vlan:0) bridge0: received packet on bridge_slave_0 with own address as source address (addr:aa:aa:aa:aa:aa:0c, vlan:0) bridge0: received packet on veth0_to_bridge with own address as source address (addr:aa:aa:aa:aa:aa:0c, vlan:0) bridge0: received packet on bridge_slave_0 with own address as source address (addr:aa:aa:aa:aa:aa:0c, vlan:0) bridge0: received packet on veth0_to_bridge with own address as source address (addr:aa:aa:aa:aa:aa:0c, vlan:0)