syzbot

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BUG: KCSAN: data-race in usbdev_ioctl / usbdev_ioctl

write to 0xffff8881035e4128 of 8 bytes by task 8119 on cpu 1:
 usbdev_do_ioctl drivers/usb/core/devio.c:2805 [inline]
 usbdev_ioctl+0x6bf/0x3eb0 drivers/usb/core/devio.c:2814
 vfs_ioctl fs/ioctl.c:51 [inline]
 __do_sys_ioctl fs/ioctl.c:870 [inline]
 __se_sys_ioctl+0xc9/0x140 fs/ioctl.c:856
 __x64_sys_ioctl+0x43/0x50 fs/ioctl.c:856
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x41/0xc0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x63/0xcd

write to 0xffff8881035e4128 of 8 bytes by task 8124 on cpu 0:
 usbdev_do_ioctl drivers/usb/core/devio.c:2805 [inline]
 usbdev_ioctl+0x6bf/0x3eb0 drivers/usb/core/devio.c:2814
 vfs_ioctl fs/ioctl.c:51 [inline]
 __do_sys_ioctl fs/ioctl.c:870 [inline]
 __se_sys_ioctl+0xc9/0x140 fs/ioctl.c:856
 __x64_sys_ioctl+0x43/0x50 fs/ioctl.c:856
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x41/0xc0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x63/0xcd

value changed: 0x00000000350c58ed -> 0x00000000389fdfee

Reported by Kernel Concurrency Sanitizer on:
CPU: 0 PID: 8124 Comm: syz-executor.2 Not tainted 6.4.0-rc7-syzkaller-00019-g99ec1ed7c2ed #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/27/2023
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