================================================================== BUG: KCSAN: data-race in dev_uevent / really_probe write to 0xffff88812cef8908 of 8 bytes by task 8916 on cpu 1: really_probe+0xe2/0xb70 drivers/base/dd.c:528 driver_probe_device+0xcc/0x120 drivers/base/dd.c:738 __device_attach_driver+0x255/0x290 drivers/base/dd.c:844 bus_for_each_drv+0xd8/0x140 drivers/base/bus.c:431 __device_attach+0x1a0/0x290 drivers/base/dd.c:912 device_initial_probe+0x16/0x20 drivers/base/dd.c:959 bus_probe_device+0x7a/0x140 drivers/base/bus.c:491 device_add+0x109c/0x1210 drivers/base/core.c:2936 usb_new_device+0x719/0xc80 drivers/usb/core/hub.c:2554 hub_port_connect drivers/usb/core/hub.c:5222 [inline] hub_port_connect_change drivers/usb/core/hub.c:5362 [inline] port_event drivers/usb/core/hub.c:5508 [inline] hub_event+0x1d25/0x2b60 drivers/usb/core/hub.c:5590 process_one_work+0x3e1/0x950 kernel/workqueue.c:2272 worker_thread+0x635/0xb90 kernel/workqueue.c:2418 kthread+0x1fd/0x220 kernel/kthread.c:292 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:296 read to 0xffff88812cef8908 of 8 bytes by task 4878 on cpu 0: dev_uevent+0x213/0x350 drivers/base/core.c:1897 uevent_show+0x10e/0x1f0 drivers/base/core.c:1969 dev_attr_show+0x35/0x90 drivers/base/core.c:1671 sysfs_kf_seq_show+0x152/0x270 fs/sysfs/file.c:61 kernfs_seq_show+0x74/0x80 fs/kernfs/file.c:167 seq_read_iter+0x2ef/0x8e0 fs/seq_file.c:228 seq_read+0x221/0x260 fs/seq_file.c:159 kernfs_fop_read+0xce/0x2f0 fs/kernfs/file.c:251 vfs_read+0x154/0x5c0 fs/read_write.c:494 ksys_read+0xce/0x180 fs/read_write.c:634 __do_sys_read fs/read_write.c:644 [inline] __se_sys_read fs/read_write.c:642 [inline] __x64_sys_read+0x3e/0x50 fs/read_write.c:642 do_syscall_64+0x39/0x80 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xa9 Reported by Kernel Concurrency Sanitizer on: CPU: 0 PID: 4878 Comm: systemd-journal Not tainted 5.10.0-rc5-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 ==================================================================