vhci_hcd: default hub control req: 0200 v0000 i0000 l0
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BUG: KCSAN: data-race in data_push_tail / vsnprintf

write to 0xffffffff86d942eb of 1 bytes by task 16912 on cpu 1:
 vsnprintf+0xe8f/0xed0
 va_format lib/vsprintf.c:1694 [inline]
 pointer+0x48c/0x830 lib/vsprintf.c:2435
 vsnprintf+0x8a1/0xed0 lib/vsprintf.c:2809
 vscnprintf+0x29/0x80 lib/vsprintf.c:2908
 printk_sprint kernel/printk/printk.c:2075 [inline]
 vprintk_store+0x638/0xbb0 kernel/printk/printk.c:2185
 vprintk_emit+0xac/0x3c0 kernel/printk/printk.c:2228
 dev_vprintk_emit+0x1c9/0x1ed drivers/base/core.c:4604
 dev_printk_emit+0x7e/0xa2 drivers/base/core.c:4615
 __dev_printk+0xfa/0x103 drivers/base/core.c:4627
 _dev_warn+0x8b/0xad drivers/base/core.c:4671
 proc_do_submiturb+0x203d/0x2290 drivers/usb/core/devio.c:1862
 proc_submiturb drivers/usb/core/devio.c:1975 [inline]
 usbdev_do_ioctl drivers/usb/core/devio.c:2671 [inline]
 usbdev_ioctl+0x25dd/0x3bb0 drivers/usb/core/devio.c:2791
 vfs_ioctl fs/ioctl.c:51 [inline]
 __do_sys_ioctl fs/ioctl.c:874 [inline]
 __se_sys_ioctl+0xcb/0x140 fs/ioctl.c:860
 __x64_sys_ioctl+0x3f/0x50 fs/ioctl.c:860
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x44/0xd0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x44/0xae

read to 0xffffffff86d942e8 of 8 bytes by task 16910 on cpu 0:
 data_make_reusable kernel/printk/printk_ringbuffer.c:587 [inline]
 data_push_tail+0x138/0x470 kernel/printk/printk_ringbuffer.c:672
 data_alloc+0xbc/0x2b0 kernel/printk/printk_ringbuffer.c:1043
 prb_reserve+0x920/0xbf0 kernel/printk/printk_ringbuffer.c:1549
 vprintk_store+0x560/0xbb0 kernel/printk/printk.c:2175
 vprintk_emit+0xac/0x3c0 kernel/printk/printk.c:2228
 vprintk_default+0x22/0x30 kernel/printk/printk.c:2255
 vprintk+0x7f/0x90 kernel/printk/printk_safe.c:50
 _printk+0x76/0x97 kernel/printk/printk.c:2265
 vhci_hub_control+0x51e/0xdf0 drivers/usb/usbip/vhci_hcd.c:636
 rh_call_control drivers/usb/core/hcd.c:683 [inline]
 rh_urb_enqueue drivers/usb/core/hcd.c:848 [inline]
 usb_hcd_submit_urb+0xce9/0x13d0 drivers/usb/core/hcd.c:1551
 usb_submit_urb+0xc1e/0xcd0 drivers/usb/core/urb.c:594
 usbfs_start_wait_urb+0x8f/0x1c0 drivers/usb/core/devio.c:1125
 do_proc_control+0x617/0xa30 drivers/usb/core/devio.c:1221
 proc_control_compat drivers/usb/core/devio.c:2120 [inline]
 usbdev_do_ioctl drivers/usb/core/devio.c:2679 [inline]
 usbdev_ioctl+0x2512/0x3bb0 drivers/usb/core/devio.c:2791
 vfs_ioctl fs/ioctl.c:51 [inline]
 __do_sys_ioctl fs/ioctl.c:874 [inline]
 __se_sys_ioctl+0xcb/0x140 fs/ioctl.c:860
 __x64_sys_ioctl+0x3f/0x50 fs/ioctl.c:860
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x44/0xd0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x44/0xae

value changed: 0x000000010000002b -> 0x00000001000a2e4b

Reported by Kernel Concurrency Sanitizer on:
CPU: 0 PID: 16910 Comm: syz-executor.1 Not tainted 5.16.0-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
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