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BUG: KCSAN: data-race in __synchronize_hardirq / handle_irq_event

write to 0xffff88812bc94600 of 4 bytes by interrupt on cpu 1:
 irqd_clear kernel/irq/internals.h:227 [inline]
 handle_irq_event+0xaf/0xca kernel/irq/handle.c:209
 handle_edge_irq+0x1a4/0x4a0 kernel/irq/chip.c:830
 generic_handle_irq_desc include/linux/irqdesc.h:156 [inline]
 do_IRQ+0x7c/0x130 arch/x86/kernel/irq.c:250
 ret_from_intr+0x0/0x21
 arch_local_irq_enable arch/x86/include/asm/paravirt.h:762 [inline]
 __raw_write_unlock_irq include/linux/rwlock_api_smp.h:267 [inline]
 _raw_write_unlock_irq+0x5b/0xa0 kernel/locking/spinlock.c:343
 release_task+0x902/0xc60 kernel/exit.c:228
 exit_notify kernel/exit.c:683 [inline]
 do_exit+0xedc/0x18a0 kernel/exit.c:822
 do_group_exit+0xb4/0x1c0 kernel/exit.c:899
 get_signal+0x2a2/0x1320 kernel/signal.c:2734
 do_signal+0x2f/0x6c0 arch/x86/kernel/signal.c:813
 exit_to_usermode_loop+0x250/0x2c0 arch/x86/entry/common.c:160
 prepare_exit_to_usermode arch/x86/entry/common.c:195 [inline]
 syscall_return_slowpath arch/x86/entry/common.c:278 [inline]
 do_syscall_64+0x384/0x3a0 arch/x86/entry/common.c:304
 entry_SYSCALL_64_after_hwframe+0x44/0xa9

read to 0xffff88812bc94600 of 4 bytes by task 25803 on cpu 0:
 irqd_irq_inprogress include/linux/irq.h:328 [inline]
 __synchronize_hardirq+0x61/0x1e0 kernel/irq/manage.c:51
 synchronize_irq+0x56/0x120 kernel/irq/manage.c:132
 serial8250_do_shutdown+0xc1/0x400 drivers/tty/serial/8250/8250_port.c:2345
 serial8250_shutdown+0x52/0x70 drivers/tty/serial/8250/8250_port.c:2391
 uart_port_shutdown+0x71/0xa0 drivers/tty/serial/serial_core.c:1703
 uart_tty_port_shutdown+0x7f/0x170 drivers/tty/serial/serial_core.c:1575
 tty_port_shutdown+0x14e/0x170 drivers/tty/tty_port.c:329
 tty_port_close drivers/tty/tty_port.c:635 [inline]
 tty_port_close+0x80/0xf0 drivers/tty/tty_port.c:630
 uart_close+0x5d/0x120 drivers/tty/serial/serial_core.c:1556
 tty_release+0x285/0x910 drivers/tty/tty_io.c:1683
 __fput+0x1e1/0x520 fs/file_table.c:280
 ____fput+0x1f/0x30 fs/file_table.c:313
 task_work_run+0xf6/0x130 kernel/task_work.c:113
 get_signal+0x12c3/0x1320 kernel/signal.c:2528
 do_signal+0x2f/0x6c0 arch/x86/kernel/signal.c:813
 exit_to_usermode_loop+0x250/0x2c0 arch/x86/entry/common.c:160
 prepare_exit_to_usermode arch/x86/entry/common.c:195 [inline]
 syscall_return_slowpath arch/x86/entry/common.c:278 [inline]
 do_syscall_64+0x384/0x3a0 arch/x86/entry/common.c:304
 entry_SYSCALL_64_after_hwframe+0x44/0xa9

Reported by Kernel Concurrency Sanitizer on:
CPU: 0 PID: 25803 Comm: syz-executor.3 Not tainted 5.6.0-rc1-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
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