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BUG: KCSAN: data-race in handle_irq_event / synchronize_irq

read-write to 0xffff88810013f600 of 4 bytes by interrupt on cpu 0:
 irqd_clear kernel/irq/internals.h:225 [inline]
 handle_irq_event+0xf3/0x120 kernel/irq/handle.c:216
 handle_edge_irq+0x16e/0x590 kernel/irq/chip.c:819
 asm_call_irq_on_stack+0xf/0x20
 __run_irq_on_irqstack arch/x86/include/asm/irq_stack.h:48 [inline]
 run_irq_on_irqstack_cond arch/x86/include/asm/irq_stack.h:101 [inline]
 handle_irq arch/x86/kernel/irq.c:230 [inline]
 __common_interrupt arch/x86/kernel/irq.c:249 [inline]
 common_interrupt+0x8e/0x130 arch/x86/kernel/irq.c:239
 asm_common_interrupt+0x1e/0x40 arch/x86/include/asm/idtentry.h:619
 native_restore_fl arch/x86/include/asm/irqflags.h:41 [inline]
 arch_local_irq_restore arch/x86/include/asm/irqflags.h:84 [inline]
 queue_delayed_work_on+0x8f/0xc0 kernel/workqueue.c:1684
 queue_delayed_work include/linux/workqueue.h:522 [inline]
 batadv_nc_start_timer net/batman-adv/network-coding.c:76 [inline]
 batadv_nc_worker+0x9cf/0x9e0 net/batman-adv/network-coding.c:737
 process_one_work+0x3e1/0x950 kernel/workqueue.c:2275
 worker_thread+0x635/0xb90 kernel/workqueue.c:2421
 kthread+0x1fd/0x220 kernel/kthread.c:292
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:296

read to 0xffff88810013f600 of 4 bytes by task 18378 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+0xbb/0x400 drivers/tty/serial/8250/8250_port.c:2447
 serial8250_shutdown+0x37/0x40 drivers/tty/serial/8250/8250_port.c:2493
 uart_port_shutdown drivers/tty/serial/serial_core.c:1710 [inline]
 uart_tty_port_shutdown+0xb9/0x1b0 drivers/tty/serial/serial_core.c:1582
 tty_port_shutdown drivers/tty/tty_port.c:330 [inline]
 tty_port_close+0x166/0x210 drivers/tty/tty_port.c:636
 uart_close+0x4a/0xd0 drivers/tty/serial/serial_core.c:1563
 tty_release+0x255/0x9f0 drivers/tty/tty_io.c:1683
 __fput+0x24b/0x4e0 fs/file_table.c:280
 ____fput+0x11/0x20 fs/file_table.c:313
 task_work_run+0x8e/0x110 kernel/task_work.c:140
 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+0x16b/0x1a0 kernel/entry/common.c:201
 __syscall_exit_to_user_mode_work kernel/entry/common.c:291 [inline]
 syscall_exit_to_user_mode+0x20/0x40 kernel/entry/common.c:302
 do_syscall_64+0x45/0x80 arch/x86/entry/common.c:56
 entry_SYSCALL_64_after_hwframe+0x44/0xa9

Reported by Kernel Concurrency Sanitizer on:
CPU: 1 PID: 18378 Comm: syz-executor.4 Not tainted 5.10.0-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
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