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BUG: KCSAN: data-race in handle_irq_event / synchronize_irq

write to 0xffff8881000ea600 of 4 bytes by interrupt on cpu 0:
 irqd_clear kernel/irq/internals.h:225 [inline]
 handle_irq_event+0x12a/0x160 kernel/irq/handle.c:216
 handle_edge_irq+0x17e/0x600 kernel/irq/chip.c:819
 generic_handle_irq_desc include/linux/irqdesc.h:158 [inline]
 handle_irq arch/x86/kernel/irq.c:231 [inline]
 __common_interrupt+0x38/0xb0 arch/x86/kernel/irq.c:250
 common_interrupt+0x73/0x90 arch/x86/kernel/irq.c:240
 asm_common_interrupt+0x1e/0x40 arch/x86/include/asm/idtentry.h:623
 check_kcov_mode kernel/kcov.c:165 [inline]
 __sanitizer_cov_trace_pc+0x33/0x60 kernel/kcov.c:197
 vm_normal_page+0x9b/0x1b0 mm/memory.c:657
 copy_present_pte mm/memory.c:866 [inline]
 copy_pte_range+0x389/0x1460 mm/memory.c:984
 copy_pmd_range mm/memory.c:1064 [inline]
 copy_pud_range mm/memory.c:1101 [inline]
 copy_p4d_range mm/memory.c:1125 [inline]
 copy_page_range+0x5ca/0x8d0 mm/memory.c:1198
 dup_mmap+0x6bb/0x9d0 kernel/fork.c:598
 dup_mm+0x7c/0x210 kernel/fork.c:1374
 copy_mm kernel/fork.c:1426 [inline]
 copy_process+0x1203/0x2e00 kernel/fork.c:2116
 kernel_clone+0x14b/0x680 kernel/fork.c:2503
 __do_sys_clone kernel/fork.c:2620 [inline]
 __se_sys_clone kernel/fork.c:2604 [inline]
 __x64_sys_clone+0xb4/0xe0 kernel/fork.c:2604
 do_syscall_64+0x4a/0x90 arch/x86/entry/common.c:47
 entry_SYSCALL_64_after_hwframe+0x44/0xae

read to 0xffff8881000ea600 of 4 bytes by task 13844 on cpu 1:
 irqd_irq_inprogress include/linux/irq.h:354 [inline]
 __synchronize_hardirq kernel/irq/manage.c:51 [inline]
 synchronize_irq+0xa6/0x2e0 kernel/irq/manage.c:132
 serial8250_do_shutdown+0xc5/0x540 drivers/tty/serial/8250/8250_port.c:2441
 serial8250_shutdown+0x37/0x40 drivers/tty/serial/8250/8250_port.c:2487
 uart_port_shutdown drivers/tty/serial/serial_core.c:1707 [inline]
 uart_tty_port_shutdown+0xd6/0x1d0 drivers/tty/serial/serial_core.c:1579
 tty_port_shutdown drivers/tty/tty_port.c:331 [inline]
 tty_port_close+0x166/0x210 drivers/tty/tty_port.c:637
 uart_close+0x4c/0x110 drivers/tty/serial/serial_core.c:1560
 tty_release+0x255/0xa10 drivers/tty/tty_io.c:1778
 __fput+0x25b/0x4e0 fs/file_table.c:280
 ____fput+0x11/0x20 fs/file_table.c:313
 task_work_run+0xae/0x130 kernel/task_work.c:164
 tracehook_notify_resume include/linux/tracehook.h:189 [inline]
 exit_to_user_mode_loop kernel/entry/common.c:174 [inline]
 exit_to_user_mode_prepare+0x156/0x190 kernel/entry/common.c:208
 __syscall_exit_to_user_mode_work kernel/entry/common.c:290 [inline]
 syscall_exit_to_user_mode+0x20/0x40 kernel/entry/common.c:301
 do_syscall_64+0x56/0x90 arch/x86/entry/common.c:57
 entry_SYSCALL_64_after_hwframe+0x44/0xae

Reported by Kernel Concurrency Sanitizer on:
CPU: 1 PID: 13844 Comm: syz-executor.2 Not tainted 5.12.0-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
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