==================================================================
BUG: KCSAN: data-race in __synchronize_hardirq / handle_irq_event

write to 0xffff88812bca0600 of 4 bytes by interrupt on cpu 1:
 irqd_clear kernel/irq/internals.h:225 [inline]
 handle_irq_event+0xa7/0xbe kernel/irq/handle.c:216
 handle_edge_irq+0x170/0x460 kernel/irq/chip.c:830
 generic_handle_irq_desc include/linux/irqdesc.h:156 [inline]
 do_IRQ+0x76/0x120 arch/x86/kernel/irq.c:250
 ret_from_intr+0x0/0x21
 arch_local_irq_enable arch/x86/include/asm/paravirt.h:769 [inline]
 preempt_schedule_irq+0x49/0x80 kernel/sched/core.c:4345
 restore_regs_and_return_to_kernel+0x0/0x25
 unmapped_area_topdown mm/mmap.c:1994 [inline]
 vm_unmapped_area+0x6e0/0xa30 mm/mmap.c:2069
 arch_get_unmapped_area_topdown+0x121/0x1d0 arch/x86/kernel/sys_x86_64.c:222
 get_unmapped_area+0x13f/0x2a0 mm/mmap.c:2218
 do_mmap+0x217/0xc20 mm/mmap.c:1413
 do_mmap_pgoff include/linux/mm.h:2553 [inline]
 vm_mmap_pgoff+0x12f/0x190 mm/util.c:506
 ksys_mmap_pgoff+0x96/0x420 mm/mmap.c:1595
 do_syscall_64+0xc7/0x3b0 arch/x86/entry/common.c:295
 entry_SYSCALL_64_after_hwframe+0x44/0xa9

read to 0xffff88812bca0600 of 4 bytes by task 23208 on cpu 0:
 irqd_irq_inprogress include/linux/irq.h:341 [inline]
 __synchronize_hardirq+0x62/0x1e0 kernel/irq/manage.c:51
 synchronize_irq+0x4a/0x120 kernel/irq/manage.c:132
 serial8250_do_shutdown+0xb3/0x3b0 drivers/tty/serial/8250/8250_port.c:2440
 serial8250_shutdown+0x49/0x60 drivers/tty/serial/8250/8250_port.c:2486
 uart_port_shutdown+0x6b/0x90 drivers/tty/serial/serial_core.c:1706
 uart_tty_port_shutdown+0x7b/0x160 drivers/tty/serial/serial_core.c:1578
 tty_port_shutdown+0x13f/0x160 drivers/tty/tty_port.c:330
 tty_port_close drivers/tty/tty_port.c:636 [inline]
 tty_port_close+0x79/0xe0 drivers/tty/tty_port.c:631
 uart_close+0x55/0x110 drivers/tty/serial/serial_core.c:1559
 tty_release+0x281/0x8e0 drivers/tty/tty_io.c:1679
 __fput+0x1e9/0x500 fs/file_table.c:280
 ____fput+0x1b/0x30 fs/file_table.c:313
 task_work_run+0xba/0x120 kernel/task_work.c:123
 get_signal+0x1236/0x1290 kernel/signal.c:2533
 do_signal+0x2b/0x840 arch/x86/kernel/signal.c:784
 exit_to_usermode_loop+0x24a/0x2c0 arch/x86/entry/common.c:161
 prepare_exit_to_usermode arch/x86/entry/common.c:196 [inline]
 syscall_return_slowpath arch/x86/entry/common.c:279 [inline]
 do_syscall_64+0x38b/0x3b0 arch/x86/entry/common.c:305
 entry_SYSCALL_64_after_hwframe+0x44/0xa9

Reported by Kernel Concurrency Sanitizer on:
CPU: 0 PID: 23208 Comm: syz-executor.2 Not tainted 5.7.0-rc1-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
==================================================================