Hello, syzbot found the following issue on: HEAD commit: 7758b206117d Merge tag 'tracefs-v6.12-rc6' of git://git.ke.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=11a8ae30580000 kernel config: https://syzkaller.appspot.com/x/.config?x=8028551073794907 dashboard link: https://syzkaller.appspot.com/bug?extid=c683dd44ac477cf58d36 compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 Unfortunately, I don't have any reproducer for this issue yet. Downloadable assets: disk image: https://storage.googleapis.com/syzbot-assets/1ee9943bd133/disk-7758b206.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/9edb15a0c4b5/vmlinux-7758b206.xz kernel image: https://storage.googleapis.com/syzbot-assets/a602adbca7b6/bzImage-7758b206.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+c683dd44ac477cf58d36@xxxxxxxxxxxxxxxxxxxxxxxxx ================================================================== BUG: KCSAN: data-race in mon_reader_del / usb_hcd_submit_urb write to 0xffff8881026af088 of 4 bytes by task 22112 on cpu 1: mon_stop drivers/usb/mon/mon_main.c:166 [inline] mon_reader_del+0x1bd/0x260 drivers/usb/mon/mon_main.c:73 mon_bin_release+0x66/0x120 drivers/usb/mon/mon_bin.c:793 __fput+0x17a/0x6d0 fs/file_table.c:431 ____fput+0x1c/0x30 fs/file_table.c:459 task_work_run+0x13a/0x1a0 kernel/task_work.c:239 exit_task_work include/linux/task_work.h:43 [inline] do_exit+0x5dd/0x17f0 kernel/exit.c:939 do_group_exit+0x102/0x150 kernel/exit.c:1088 get_signal+0xf2a/0x1070 kernel/signal.c:2917 arch_do_signal_or_restart+0x95/0x4b0 arch/x86/kernel/signal.c:337 exit_to_user_mode_loop kernel/entry/common.c:111 [inline] exit_to_user_mode_prepare include/linux/entry-common.h:328 [inline] __syscall_exit_to_user_mode_work kernel/entry/common.c:207 [inline] syscall_exit_to_user_mode+0x59/0x130 kernel/entry/common.c:218 do_syscall_64+0xd6/0x1c0 arch/x86/entry/common.c:89 entry_SYSCALL_64_after_hwframe+0x77/0x7f read to 0xffff8881026af088 of 4 bytes by task 5308 on cpu 0: usbmon_urb_submit include/linux/usb/hcd.h:723 [inline] usb_hcd_submit_urb+0x86/0x1510 drivers/usb/core/hcd.c:1518 usb_submit_urb+0xa80/0xb70 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+0xbf/0x480 drivers/usb/core/hub.c:621 usb_hub_port_status drivers/usb/core/hub.c:671 [inline] port_event drivers/usb/core/hub.c:5714 [inline] hub_event+0x538/0x2910 drivers/usb/core/hub.c:5903 process_one_work kernel/workqueue.c:3229 [inline] process_scheduled_works+0x483/0x9a0 kernel/workqueue.c:3310 worker_thread+0x51d/0x6f0 kernel/workqueue.c:3391 kthread+0x1d1/0x210 kernel/kthread.c:389 ret_from_fork+0x4b/0x60 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244 value changed: 0x00000001 -> 0x00000000 Reported by Kernel Concurrency Sanitizer on: CPU: 0 UID: 0 PID: 5308 Comm: kworker/0:4 Tainted: G W 6.12.0-rc6-syzkaller-00099-g7758b206117d #0 Tainted: [W]=WARN Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024 Workqueue: usb_hub_wq hub_event ================================================================== --- This report is generated by a bot. It may contain errors. See https://goo.gl/tpsmEJ for more information about syzbot. syzbot engineers can be reached at syzkaller@xxxxxxxxxxxxxxxx. syzbot will keep track of this issue. See: https://goo.gl/tpsmEJ#status for how to communicate with syzbot. If the report is already addressed, let syzbot know by replying with: #syz fix: exact-commit-title If you want to overwrite report's subsystems, reply with: #syz set subsystems: new-subsystem (See the list of subsystem names on the web dashboard) If the report is a duplicate of another one, reply with: #syz dup: exact-subject-of-another-report If you want to undo deduplication, reply with: #syz undup
