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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:638
 security_inode_permission+0x1c/0xc0 security/security.c:1310
 inode_permission+0x91/0x290 fs/namei.c:521
 may_lookup fs/namei.c:1655 [inline]
 link_path_walk+0x17d/0x780 fs/namei.c:2211
 path_parentat fs/namei.c:2473 [inline]
 filename_parentat+0x104/0x950 fs/namei.c:2495
 do_unlinkat+0x59/0x4f0 fs/namei.c:4063
 __do_sys_unlink fs/namei.c:4139 [inline]
 __se_sys_unlink fs/namei.c:4137 [inline]
 __x64_sys_unlink+0x2c/0x30 fs/namei.c:4137
 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 3177 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_shutdown+0x276/0x410 drivers/tty/serial/serial_core.c:299
 uart_hangup+0x9e/0x250 drivers/tty/serial/serial_core.c:1674
 __tty_hangup+0x5d4/0x680 drivers/tty/tty_io.c:662
 tty_vhangup drivers/tty/tty_io.c:712 [inline]
 tty_ioctl+0x532/0x1120 drivers/tty/tty_io.c:2746
 vfs_ioctl fs/ioctl.c:51 [inline]
 __do_sys_ioctl fs/ioctl.c:1069 [inline]
 __se_sys_ioctl+0xcb/0x140 fs/ioctl.c:1055
 __x64_sys_ioctl+0x3f/0x50 fs/ioctl.c:1055
 do_syscall_64+0x4a/0x90 arch/x86/entry/common.c:47
 entry_SYSCALL_64_after_hwframe+0x44/0xae

Reported by Kernel Concurrency Sanitizer on:
CPU: 1 PID: 3177 Comm: syz-executor.1 Tainted: G        W         5.13.0-rc2-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
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