================================================================== BUG: KCSAN: data-race in mon_reader_add / usb_hcd_submit_urb write to 0xffff888101eac088 of 4 bytes by task 14887 on cpu 1: mon_reader_add+0xc7/0x1f0 drivers/usb/mon/mon_main.c:47 mon_bin_open+0x32b/0x3b0 drivers/usb/mon/mon_bin.c:720 chrdev_open+0x323/0x3a0 fs/char_dev.c:414 do_dentry_open+0x63c/0xbe0 fs/open.c:955 vfs_open+0x4a/0x60 fs/open.c:1089 do_open fs/namei.c:3642 [inline] path_openat+0x18ba/0x1d80 fs/namei.c:3799 do_filp_open+0xf7/0x200 fs/namei.c:3826 do_sys_openat2+0xab/0x120 fs/open.c:1406 do_sys_open fs/open.c:1421 [inline] __do_sys_openat fs/open.c:1437 [inline] __se_sys_openat fs/open.c:1432 [inline] __x64_sys_openat+0xf3/0x120 fs/open.c:1432 do_syscall_64+0xd3/0x1d0 entry_SYSCALL_64_after_hwframe+0x6d/0x75 read to 0xffff888101eac088 of 4 bytes by task 5637 on cpu 0: usbmon_urb_submit include/linux/usb/hcd.h:723 [inline] usb_hcd_submit_urb+0x86/0x1510 drivers/usb/core/hcd.c:1520 usb_submit_urb+0xb12/0xbc0 drivers/usb/core/urb.c:581 usb_start_wait_urb+0x91/0x190 drivers/usb/core/message.c:59 usb_internal_control_msg drivers/usb/core/message.c:103 [inline] usb_control_msg+0x182/0x240 drivers/usb/core/message.c:154 get_port_status drivers/usb/core/hub.c:604 [inline] hub_ext_port_status+0xb4/0x380 drivers/usb/core/hub.c:621 usb_hub_port_status drivers/usb/core/hub.c:643 [inline] port_event drivers/usb/core/hub.c:5676 [inline] hub_event+0x535/0x2900 drivers/usb/core/hub.c:5865 process_one_work kernel/workqueue.c:3254 [inline] process_scheduled_works+0x465/0x990 kernel/workqueue.c:3335 worker_thread+0x526/0x730 kernel/workqueue.c:3416 kthread+0x1d1/0x210 kernel/kthread.c:388 ret_from_fork+0x4b/0x60 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:243 value changed: 0x00000000 -> 0x00000001 Reported by Kernel Concurrency Sanitizer on: CPU: 0 PID: 5637 Comm: kworker/0:9 Tainted: G W 6.8.0-syzkaller-09791-ge5eb28f6d1af #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/29/2024 Workqueue: usb_hub_wq hub_event ==================================================================