[moderation] [usb?] KCSAN: data-race in usbdev_ioctl / usbdev_ioctl (12)

[syzbot]

Hello,

syzbot found the following issue on:

HEAD commit: 707df3375124 Merge tag 'media/v6.15-2' of git://git.kernel..
git tree: upstream
console output: https://syzkaller.appspot.com/x/log.txt?x=15e4b2bc580000
kernel config: https://syzkaller.appspot.com/x/.config?x=6154604431d9aaf9
dashboard link: https://syzkaller.appspot.com/bug?extid=f8a87b69048c33799721
compiler: Debian clang version 20.1.2 (++20250402124445+58df0ef89dd6-1~exp1~20250402004600.97), Debian LLD 20.1.2
CC: [gre...@linuxfoundation.org linux-...@vger.kernel.org linu...@vger.kernel.org]

Unfortunately, I don't have any reproducer for this issue yet.

Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/457042e54922/disk-707df337.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/1b0aed071afc/vmlinux-707df337.xz
kernel image: https://storage.googleapis.com/syzbot-assets/81464bede1cb/bzImage-707df337.xz

IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+f8a87b...@syzkaller.appspotmail.com

==================================================================
BUG: KCSAN: data-race in usbdev_ioctl / usbdev_ioctl

write to 0xffff888102f59830 of 4 bytes by task 22116 on cpu 0:
inode_set_atime_to_ts include/linux/fs.h:1672 [inline]
usbdev_do_ioctl drivers/usb/core/devio.c:2818 [inline]
usbdev_ioctl+0x5ff/0x1710 drivers/usb/core/devio.c:2827
vfs_ioctl fs/ioctl.c:51 [inline]
__do_sys_ioctl fs/ioctl.c:906 [inline]
__se_sys_ioctl+0xcb/0x140 fs/ioctl.c:892
__x64_sys_ioctl+0x43/0x50 fs/ioctl.c:892
x64_sys_call+0x19a8/0x2fb0 arch/x86/include/generated/asm/syscalls_64.h:17
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xd0/0x1a0 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f

write to 0xffff888102f59830 of 4 bytes by task 22119 on cpu 1:
inode_set_atime_to_ts include/linux/fs.h:1672 [inline]
usbdev_do_ioctl drivers/usb/core/devio.c:2818 [inline]
usbdev_ioctl+0x5ff/0x1710 drivers/usb/core/devio.c:2827
vfs_ioctl fs/ioctl.c:51 [inline]
__do_sys_ioctl fs/ioctl.c:906 [inline]
__se_sys_ioctl+0xcb/0x140 fs/ioctl.c:892
__x64_sys_ioctl+0x43/0x50 fs/ioctl.c:892
x64_sys_call+0x19a8/0x2fb0 arch/x86/include/generated/asm/syscalls_64.h:17
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xd0/0x1a0 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f

value changed: 0x2f369f85 -> 0x3231900e

Reported by Kernel Concurrency Sanitizer on:
CPU: 1 UID: 0 PID: 22119 Comm: syz.5.4145 Not tainted 6.15.0-rc5-syzkaller-00038-g707df3375124 #0 PREEMPT(voluntary)
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/19/2025
==================================================================


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[syzbot]

Auto-closing this bug as obsolete.
Crashes did not happen for a while, no reproducer and no activity.