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KCSAN: data-race in usbdev_ioctl / usbdev_ioctl (4)

Status: auto-obsoleted due to no activity on 2022/11/12 18:04
Subsystems: usb
[Documentation on labels]
First crash: 1128d, last: 1128d
▶ ▼ Similar bugs (12)
Kernel Title Rank 🛈 Repro Cause bisect Fix bisect Count Last Reported Patched Status
upstream KCSAN: data-race in usbdev_ioctl / usbdev_ioctl (8) usb 6 4 569d 576d 0/29 auto-obsoleted due to no activity on 2024/05/23 21:51
upstream KCSAN: data-race in usbdev_ioctl / usbdev_ioctl (12) usb 6 2 135d 185d 0/29 auto-obsoleted due to no activity on 2025/08/21 21:41
upstream KCSAN: data-race in usbdev_ioctl / usbdev_ioctl (13) usb 6 1 47d 47d 0/29 moderation: reported on 2025/09/23 12:23
upstream KCSAN: data-race in usbdev_ioctl / usbdev_ioctl usb 6 1 1828d 1798d 0/29 auto-closed as invalid on 2020/12/21 11:58
upstream KCSAN: data-race in usbdev_ioctl / usbdev_ioctl (3) usb 6 2 1318d 1348d 0/29 auto-closed as invalid on 2022/05/06 03:42
upstream KCSAN: data-race in usbdev_ioctl / usbdev_ioctl (7) usb 6 2 636d 657d 0/29 auto-obsoleted due to no activity on 2024/03/18 17:20
upstream KCSAN: data-race in usbdev_ioctl / usbdev_ioctl (2) usb 6 1 1448d 1448d 0/29 auto-closed as invalid on 2021/12/27 18:11
upstream KCSAN: data-race in usbdev_ioctl / usbdev_ioctl (5) usb 6 1 936d 936d 0/29 auto-obsoleted due to no activity on 2023/05/23 16:35
upstream KCSAN: data-race in usbdev_ioctl / usbdev_ioctl (10) usb 6 3 383d 428d 0/29 auto-obsoleted due to no activity on 2024/12/17 19:31
upstream KCSAN: data-race in usbdev_ioctl / usbdev_ioctl (11) usb 6 2 290d 310d 0/29 auto-obsoleted due to no activity on 2025/03/19 22:59
upstream KCSAN: data-race in usbdev_ioctl / usbdev_ioctl (9) usb 6 3 475d 522d 0/29 auto-obsoleted due to no activity on 2024/08/25 21:37
upstream KCSAN: data-race in usbdev_ioctl / usbdev_ioctl (6) usb 6 1 873d 873d 0/29 auto-obsoleted due to no activity on 2023/07/25 21:09

Sample crash report:
==================================================================
BUG: KCSAN: data-race in usbdev_ioctl / usbdev_ioctl

write to 0xffff888103793a58 of 8 bytes by task 21827 on cpu 1:
 usbdev_do_ioctl drivers/usb/core/devio.c:2798 [inline]
 usbdev_ioctl+0x626/0x4150 drivers/usb/core/devio.c:2807
 vfs_ioctl fs/ioctl.c:51 [inline]
 __do_sys_ioctl fs/ioctl.c:870 [inline]
 __se_sys_ioctl+0xcb/0x140 fs/ioctl.c:856
 __x64_sys_ioctl+0x3f/0x50 fs/ioctl.c:856
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x2b/0x70 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x63/0xcd

write to 0xffff888103793a58 of 8 bytes by task 21809 on cpu 0:
 usbdev_do_ioctl drivers/usb/core/devio.c:2798 [inline]
 usbdev_ioctl+0x626/0x4150 drivers/usb/core/devio.c:2807
 vfs_ioctl fs/ioctl.c:51 [inline]
 __do_sys_ioctl fs/ioctl.c:870 [inline]
 __se_sys_ioctl+0xcb/0x140 fs/ioctl.c:856
 __x64_sys_ioctl+0x3f/0x50 fs/ioctl.c:856
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x2b/0x70 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x63/0xcd

value changed: 0x00000000048bcc4c -> 0x00000000052462e9

Reported by Kernel Concurrency Sanitizer on:
CPU: 0 PID: 21809 Comm: syz-executor.5 Not tainted 6.0.0-syzkaller-07362-g62e6e5940c0c-dirty #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/22/2022
==================================================================
blktrace: Concurrent blktraces are not allowed on loop11

Crashes (1):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2022/10/08 18:03 upstream 62e6e5940c0c aea5da89 .config console log report info ci2-upstream-kcsan-gce KCSAN: data-race in usbdev_ioctl / usbdev_ioctl
* Struck through repros no longer work on HEAD.