vhci_hcd vhci_hcd.0: devid(0) speed(3) speed_str(high-speed)
vhci_hcd vhci_hcd.0: Device attached
==================================================================
BUG: KCSAN: data-race in data_push_tail / string

write to 0xffffffff883957c1 of 1 bytes by task 21721 on cpu 1:
 string_nocheck lib/vsprintf.c:650 [inline]
 string+0x16c/0x210 lib/vsprintf.c:728
 vsnprintf+0xa09/0xe30 lib/vsprintf.c:2824
 vscnprintf+0x42/0x90 lib/vsprintf.c:2930
 printk_sprint+0x30/0x2d0 kernel/printk/printk.c:2159
 vprintk_store+0x570/0x810 kernel/printk/printk.c:2273
 vprintk_emit+0x10c/0x5e0 kernel/printk/printk.c:2323
 dev_vprintk_emit+0x1df/0x210 drivers/base/core.c:4864
 dev_printk_emit+0x82/0xb0 drivers/base/core.c:4875
 __dev_printk+0xf6/0x110 drivers/base/core.c:4887
 _dev_info+0x99/0xc0 drivers/base/core.c:4933
 attach_store+0x61d/0x6b0 drivers/usb/usbip/vhci_sysfs.c:438
 dev_attr_store+0x47/0x70 drivers/base/core.c:2380
 sysfs_kf_write+0xae/0xd0 fs/sysfs/file.c:136
 kernfs_fop_write_iter+0x1ce/0x2c0 fs/kernfs/file.c:334
 call_write_iter include/linux/fs.h:2108 [inline]
 new_sync_write fs/read_write.c:497 [inline]
 vfs_write+0x771/0x8e0 fs/read_write.c:590
 ksys_write+0xeb/0x1b0 fs/read_write.c:643
 __do_sys_write fs/read_write.c:655 [inline]
 __se_sys_write fs/read_write.c:652 [inline]
 __x64_sys_write+0x42/0x50 fs/read_write.c:652
 do_syscall_64+0xd3/0x1d0
 entry_SYSCALL_64_after_hwframe+0x6d/0x75

read to 0xffffffff883957c0 of 8 bytes by task 21722 on cpu 0:
 data_make_reusable kernel/printk/printk_ringbuffer.c:594 [inline]
 data_push_tail+0x102/0x430 kernel/printk/printk_ringbuffer.c:679
 data_alloc+0xbe/0x2c0 kernel/printk/printk_ringbuffer.c:1054
 prb_reserve+0x85e/0xb60 kernel/printk/printk_ringbuffer.c:1669
 vprintk_store+0x53f/0x810 kernel/printk/printk.c:2263
 vprintk_emit+0x10c/0x5e0 kernel/printk/printk.c:2323
 dev_vprintk_emit+0x1df/0x210 drivers/base/core.c:4864
 dev_printk_emit+0x82/0xb0 drivers/base/core.c:4875
 __dev_printk+0xf6/0x110 drivers/base/core.c:4887
 _dev_info+0x99/0xc0 drivers/base/core.c:4933
 attach_store+0x61d/0x6b0 drivers/usb/usbip/vhci_sysfs.c:438
 dev_attr_store+0x47/0x70 drivers/base/core.c:2380
 sysfs_kf_write+0xae/0xd0 fs/sysfs/file.c:136
 kernfs_fop_write_iter+0x1ce/0x2c0 fs/kernfs/file.c:334
 call_write_iter include/linux/fs.h:2108 [inline]
 new_sync_write fs/read_write.c:497 [inline]
 vfs_write+0x771/0x8e0 fs/read_write.c:590
 ksys_write+0xeb/0x1b0 fs/read_write.c:643
 __do_sys_write fs/read_write.c:655 [inline]
 __se_sys_write fs/read_write.c:652 [inline]
 __x64_sys_write+0x42/0x50 fs/read_write.c:652
 do_syscall_64+0xd3/0x1d0
 entry_SYSCALL_64_after_hwframe+0x6d/0x75

value changed: 0x0000000100018c05 -> 0x63685f6963687620

Reported by Kernel Concurrency Sanitizer on:
CPU: 0 PID: 21722 Comm: syz-executor.0 Not tainted 6.8.0-syzkaller-11743-ga4145ce1e7bc #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/29/2024
==================================================================
vhci_hcd vhci_hcd.0: pdev(0) rhport(1) sockfd(8)
vhci_hcd vhci_hcd.0: devid(0) speed(3) speed_str(high-speed)
vhci_hcd vhci_hcd.0: Device attached
vhci_hcd vhci_hcd.0: pdev(0) rhport(2) sockfd(12)
vhci_hcd vhci_hcd.0: devid(0) speed(3) speed_str(high-speed)
vhci_hcd vhci_hcd.0: Device attached
vhci_hcd vhci_hcd.0: pdev(0) rhport(3) sockfd(18)
vhci_hcd vhci_hcd.0: devid(0) speed(3) speed_str(high-speed)
vhci_hcd vhci_hcd.0: Device attached
vhci_hcd vhci_hcd.0: pdev(0) rhport(4) sockfd(22)
vhci_hcd vhci_hcd.0: devid(0) speed(3) speed_str(high-speed)
vhci_hcd vhci_hcd.0: Device attached
vhci_hcd vhci_hcd.0: pdev(0) rhport(5) sockfd(26)
vhci_hcd vhci_hcd.0: devid(0) speed(3) speed_str(high-speed)
vhci_hcd vhci_hcd.0: Device attached
vhci_hcd vhci_hcd.0: pdev(0) rhport(6) sockfd(32)
vhci_hcd vhci_hcd.0: devid(0) speed(3) speed_str(high-speed)
vhci_hcd vhci_hcd.0: Device attached
vhci_hcd vhci_hcd.0: pdev(0) rhport(7) sockfd(34)
vhci_hcd vhci_hcd.0: devid(0) speed(3) speed_str(high-speed)
vhci_hcd vhci_hcd.0: Device attached
vhci_hcd vhci_hcd.0: port 0 already used