vhci_hcd vhci_hcd.0: devid(0) speed(4) speed_str(wireless)
vhci_hcd vhci_hcd.0: Device attached
vhci_hcd vhci_hcd.0: pdev(1) rhport(3) sockfd(5)
vhci_hcd vhci_hcd.0: devid(0) speed(4) speed_str(wireless)
vhci_hcd vhci_hcd.0: Device attached
==================================================================
BUG: KCSAN: data-race in data_push_tail / string

write to 0xffffffff86ee4008 of 1 bytes by task 20529 on cpu 1:
 string_nocheck lib/vsprintf.c:650 [inline]
 string+0x16c/0x200 lib/vsprintf.c:728
 vsnprintf+0xa09/0xe20 lib/vsprintf.c:2819
 vscnprintf+0x42/0x80 lib/vsprintf.c:2925
 printk_sprint+0x30/0x2d0 kernel/printk/printk.c:2124
 vprintk_store+0x56f/0x800 kernel/printk/printk.c:2238
 vprintk_emit+0xd0/0x5d0 kernel/printk/printk.c:2284
 dev_vprintk_emit+0x1df/0x210 drivers/base/core.c:4850
 dev_printk_emit+0x82/0xb0 drivers/base/core.c:4861
 __dev_printk+0xf6/0x100 drivers/base/core.c:4873
 _dev_info+0x99/0xc0 drivers/base/core.c:4919
 attach_store+0x619/0x6b0 drivers/usb/usbip/vhci_sysfs.c:438
 dev_attr_store+0x44/0x60 drivers/base/core.c:2366
 sysfs_kf_write+0xaa/0xc0 fs/sysfs/file.c:136
 kernfs_fop_write_iter+0x1ca/0x2b0 fs/kernfs/file.c:334
 call_write_iter include/linux/fs.h:2020 [inline]
 new_sync_write fs/read_write.c:491 [inline]
 vfs_write+0x48a/0x790 fs/read_write.c:584
 ksys_write+0xeb/0x1a0 fs/read_write.c:637
 __do_sys_write fs/read_write.c:649 [inline]
 __se_sys_write fs/read_write.c:646 [inline]
 __x64_sys_write+0x42/0x50 fs/read_write.c:646
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0x44/0x110 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x63/0x6b

read to 0xffffffff86ee4008 of 8 bytes by task 20528 on cpu 0:
 data_make_reusable kernel/printk/printk_ringbuffer.c:590 [inline]
 data_push_tail+0x102/0x430 kernel/printk/printk_ringbuffer.c:675
 data_alloc+0xbe/0x2c0 kernel/printk/printk_ringbuffer.c:1046
 prb_reserve+0x893/0xbc0 kernel/printk/printk_ringbuffer.c:1555
 vprintk_store+0x53e/0x800 kernel/printk/printk.c:2228
 vprintk_emit+0xd0/0x5d0 kernel/printk/printk.c:2284
 dev_vprintk_emit+0x1df/0x210 drivers/base/core.c:4850
 dev_printk_emit+0x82/0xb0 drivers/base/core.c:4861
 __dev_printk+0xf6/0x100 drivers/base/core.c:4873
 _dev_info+0x99/0xc0 drivers/base/core.c:4919
 attach_store+0x619/0x6b0 drivers/usb/usbip/vhci_sysfs.c:438
 dev_attr_store+0x44/0x60 drivers/base/core.c:2366
 sysfs_kf_write+0xaa/0xc0 fs/sysfs/file.c:136
 kernfs_fop_write_iter+0x1ca/0x2b0 fs/kernfs/file.c:334
 call_write_iter include/linux/fs.h:2020 [inline]
 new_sync_write fs/read_write.c:491 [inline]
 vfs_write+0x48a/0x790 fs/read_write.c:584
 ksys_write+0xeb/0x1a0 fs/read_write.c:637
 __do_sys_write fs/read_write.c:649 [inline]
 __se_sys_write fs/read_write.c:646 [inline]
 __x64_sys_write+0x42/0x50 fs/read_write.c:646
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0x44/0x110 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x63/0x6b

value changed: 0x00000001000092ea -> 0x6463685f69636876

Reported by Kernel Concurrency Sanitizer on:
CPU: 0 PID: 20528 Comm: syz-executor.1 Tainted: G        W          6.7.0-rc5-syzkaller-00047-g5bd7ef53ffe5 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/10/2023
==================================================================
vhci_hcd vhci_hcd.0: pdev(1) rhport(5) sockfd(12)
vhci_hcd vhci_hcd.0: devid(0) speed(4) speed_str(wireless)
vhci_hcd vhci_hcd.0: Device attached
vhci_hcd vhci_hcd.0: pdev(1) rhport(6) sockfd(16)
vhci_hcd vhci_hcd.0: devid(0) speed(4) speed_str(wireless)
vhci_hcd vhci_hcd.0: Device attached
vhci_hcd vhci_hcd.0: port 0 already used