bridge0: port 1(bridge_slave_0) entered forwarding state
bridge0: port 2(bridge_slave_1) entered forwarding state
bridge0: port 2(bridge_slave_1) entered forwarding state
bridge0: port 1(bridge_slave_0) entered forwarding state
bridge0: port 2(bridge_slave_1) entered forwarding state
INFO: rcu_preempt detected stalls on CPUs/tasks:
	(detected by 0, t=10502 jiffies, g=261, c=260, q=6)
All QSes seen, last rcu_preempt kthread activity 10502 (4294958734-4294948232), jiffies_till_next_fqs=1, root ->qsmask 0x0
syz-executor.0  R  running task    12712  5840   5403 0x00000000
 ffff88003b1e87d0 ffff88003ec03d98 ffffffff811a3fa2 0000000000002906
 ffffffff8325ce40 0000000000000105 0000000000000000 ffff88003ec03e28
 ffffffff811ea439 0000000000000000 ffff88003ec10820 ffff88003b1e87d0
Call Trace:
 <IRQ>  [<ffffffff811a3fa2>] sched_show_task+0xf2/0x1a0 kernel/sched/core.c:4545
 [<ffffffff811ea439>] print_other_cpu_stall kernel/rcu/tree.c:1226 [inline]
 [<ffffffff811ea439>] check_cpu_stall kernel/rcu/tree.c:1332 [inline]
 [<ffffffff811ea439>] __rcu_pending kernel/rcu/tree.c:3422 [inline]
 [<ffffffff811ea439>] rcu_pending kernel/rcu/tree.c:3486 [inline]
 [<ffffffff811ea439>] rcu_check_callbacks+0xd69/0xd70 kernel/rcu/tree.c:2703
 [<ffffffff811f0864>] update_process_times+0x34/0x60 kernel/time/timer.c:1396
 [<ffffffff81203140>] tick_sched_handle.isra.22+0x20/0x60 kernel/time/tick-sched.c:151
 [<ffffffff812033fc>] tick_sched_timer+0x3c/0x80 kernel/time/tick-sched.c:1124
 [<ffffffff811f1466>] __run_hrtimer+0xe6/0x760 kernel/time/hrtimer.c:1220
 [<ffffffff811f2733>] hrtimer_interrupt+0x103/0x230 kernel/time/hrtimer.c:1299
 [<ffffffff810be455>] local_apic_timer_interrupt+0x35/0x60 arch/x86/kernel/apic/apic.c:890
 [<ffffffff810be6ac>] smp_apic_timer_interrupt+0x3c/0x50 arch/x86/kernel/apic/apic.c:914
 [<ffffffff82653f73>] apic_timer_interrupt+0x73/0x80 arch/x86/kernel/entry_64.S:923
 <EOI>  [<ffffffff8264ebd8>] ? arch_local_irq_restore arch/x86/include/asm/paravirt.h:809 [inline]
 <EOI>  [<ffffffff8264ebd8>] ? __mutex_lock_common kernel/locking/mutex.c:599 [inline]
 <EOI>  [<ffffffff8264ebd8>] ? mutex_lock_nested+0x528/0x610 kernel/locking/mutex.c:617
 [<ffffffff813fea40>] ext4_file_write_iter+0x80/0x4a0 fs/ext4/file.c:115
 [<ffffffff812fde52>] vfs_iter_write+0x62/0xa0 fs/read_write.c:364
 [<ffffffff813365d4>] iter_file_splice_write+0x254/0x3a0 fs/splice.c:1011
 [<ffffffff81335f01>] do_splice_from fs/splice.c:1115 [inline]
 [<ffffffff81335f01>] direct_splice_actor+0x31/0x40 fs/splice.c:1281
 [<ffffffff8133687c>] splice_direct_to_actor+0xcc/0x210 fs/splice.c:1234
 [<ffffffff81336a4a>] do_splice_direct+0x8a/0xb0 fs/splice.c:1324
 [<ffffffff812fef7b>] do_sendfile+0x1ab/0x3a0 fs/read_write.c:1227
 [<ffffffff812ffb1f>] SYSC_sendfile64 fs/read_write.c:1282 [inline]
 [<ffffffff812ffb1f>] SyS_sendfile64+0x4f/0xb0 fs/read_write.c:1274
 [<ffffffff82653032>] system_call_fastpath+0x16/0x7a
rcu_preempt kthread starved for 10504 jiffies!