================================================================== BUG: KCSAN: data-race in __ps2_command / ps2_handle_response write to 0xffff88810258f650 of 8 bytes by interrupt on cpu 0: ps2_handle_response+0x113/0x140 drivers/input/serio/libps2.c:472 psmouse_interrupt+0x6d4/0x930 drivers/input/mouse/psmouse-base.c:369 serio_interrupt+0x5d/0xe0 drivers/input/serio/serio.c:1002 i8042_interrupt+0x39e/0x720 drivers/input/serio/i8042.c:602 __handle_irq_event_percpu+0x93/0x3f0 kernel/irq/handle.c:156 handle_irq_event_percpu kernel/irq/handle.c:196 [inline] handle_irq_event+0xb0/0x160 kernel/irq/handle.c:213 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 smap_restore arch/x86/include/asm/smap.h:67 [inline] kcsan_setup_watchpoint+0x436/0x470 kernel/kcsan/core.c:595 bio_flagged include/linux/bio.h:259 [inline] submit_bio_checks+0x62a/0x800 block/blk-core.c:896 submit_bio_noacct+0x33/0x7e0 block/blk-core.c:1032 submit_bio+0x16d/0x2b0 block/blk-core.c:1090 ext4_io_submit+0xcd/0xf0 fs/ext4/page-io.c:379 ext4_writepages+0x6e0/0x1d10 fs/ext4/inode.c:2758 do_writepages+0x7b/0x150 mm/page-writeback.c:2352 __writeback_single_inode+0x80/0x450 fs/fs-writeback.c:1467 writeback_sb_inodes+0x564/0xf10 fs/fs-writeback.c:1732 __writeback_inodes_wb fs/fs-writeback.c:1801 [inline] wb_writeback+0x327/0x700 fs/fs-writeback.c:1907 wb_check_start_all fs/fs-writeback.c:2031 [inline] wb_do_writeback+0x330/0x510 fs/fs-writeback.c:2057 wb_workfn+0xc8/0x520 fs/fs-writeback.c:2091 process_one_work+0x3e9/0x8f0 kernel/workqueue.c:2276 worker_thread+0x636/0xae0 kernel/workqueue.c:2422 kthread+0x1d0/0x1f0 kernel/kthread.c:313 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:294 read to 0xffff88810258f650 of 8 bytes by task 22369 on cpu 1: __ps2_command+0x6cb/0xa40 drivers/input/serio/libps2.c:291 ps2_command+0x51/0x90 drivers/input/serio/libps2.c:332 synaptics_detect+0x8c/0x110 drivers/input/mouse/synaptics.c:105 psmouse_do_detect drivers/input/mouse/psmouse-base.c:1009 [inline] psmouse_extensions+0x7ea/0x1790 drivers/input/mouse/psmouse-base.c:1104 __psmouse_reconnect+0x31e/0x620 drivers/input/mouse/psmouse-base.c:1728 psmouse_reconnect+0x13/0x20 drivers/input/mouse/psmouse-base.c:1766 serio_reconnect_driver drivers/input/serio/serio.c:59 [inline] serio_reconnect_port drivers/input/serio/serio.c:588 [inline] serio_handle_event+0x6be/0xc20 drivers/input/serio/serio.c:214 process_one_work+0x3e9/0x8f0 kernel/workqueue.c:2276 worker_thread+0x636/0xae0 kernel/workqueue.c:2422 kthread+0x1d0/0x1f0 kernel/kthread.c:313 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:294 Reported by Kernel Concurrency Sanitizer on: CPU: 1 PID: 22369 Comm: kworker/1:4 Not tainted 5.13.0-rc3-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Workqueue: events_long serio_handle_event ==================================================================