================================================================== BUG: KCSAN: data-race in handle_irq_event / synchronize_irq read-write to 0xffff888100142600 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:622 __preempt_count_dec_and_test arch/x86/include/asm/preempt.h:94 [inline] __raw_write_unlock_irq include/linux/rwlock_api_smp.h:268 [inline] _raw_write_unlock_irq+0x14/0x20 kernel/locking/spinlock.c:343 release_task+0xaf1/0xd30 kernel/exit.c:219 wait_task_zombie kernel/exit.c:1088 [inline] wait_consider_task+0xf89/0x1820 kernel/exit.c:1315 do_wait_thread kernel/exit.c:1378 [inline] do_wait+0x1b1/0x4a0 kernel/exit.c:1449 kernel_wait4+0x13c/0x1a0 kernel/exit.c:1611 __do_sys_wait4 kernel/exit.c:1639 [inline] __se_sys_wait4 kernel/exit.c:1635 [inline] __x64_sys_wait4+0x7a/0x100 kernel/exit.c:1635 do_syscall_64+0x39/0x80 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xa9 read to 0xffff888100142600 of 4 bytes by task 10563 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:1706 [inline] uart_tty_port_shutdown+0xb9/0x1b0 drivers/tty/serial/serial_core.c:1578 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:1559 tty_release+0x255/0x9f0 drivers/tty/tty_io.c:1679 __fput+0x243/0x4d0 fs/file_table.c:281 ____fput+0x11/0x20 fs/file_table.c:314 task_work_run+0x8e/0x110 kernel/task_work.c:151 tracehook_notify_resume include/linux/tracehook.h:188 [inline] exit_to_user_mode_loop kernel/entry/common.c:164 [inline] exit_to_user_mode_prepare+0x13c/0x170 kernel/entry/common.c:191 syscall_exit_to_user_mode+0x16/0x30 kernel/entry/common.c:266 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: 10563 Comm: syz-executor.3 Not tainted 5.10.0-rc1-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 ==================================================================