tipc: Disabling bearer <eth:syzkaller0>
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BUG: KCSAN: data-race in data_push_tail / string

write to 0xffffffff88e3c510 of 1 bytes by task 1035 on cpu 0:
 string_nocheck lib/vsprintf.c:643 [inline]
 string+0x187/0x220 lib/vsprintf.c:721
 vsnprintf+0x532/0x890 lib/vsprintf.c:2874
 vscnprintf+0x41/0x90 lib/vsprintf.c:2939
 printk_sprint+0x30/0x2d0 kernel/printk/printk.c:2216
 vprintk_store+0x599/0x860 kernel/printk/printk.c:2336
 vprintk_emit+0x178/0x650 kernel/printk/printk.c:2426
 dev_vprintk_emit+0x242/0x2a0 drivers/base/core.c:4917
 dev_printk_emit+0x84/0xb0 drivers/base/core.c:4928
 __dev_printk+0xf3/0x110 drivers/base/core.c:4940
 _dev_warn+0x9b/0xd0 drivers/base/core.c:4984
 hid_parser_main+0x6ff/0x750 drivers/hid/hid-core.c:-1
 hid_open_report+0x48b/0x7a0 drivers/hid/hid-core.c:1328
 hid_parse include/linux/hid.h:1133 [inline]
 hid_generic_probe+0x33/0x70 drivers/hid/hid-generic.c:66
 __hid_device_probe drivers/hid/hid-core.c:2724 [inline]
 hid_device_probe+0x2c8/0x490 drivers/hid/hid-core.c:2761
 call_driver_probe drivers/base/dd.c:-1 [inline]
 really_probe+0x1bf/0x5a0 drivers/base/dd.c:657
 __driver_probe_device+0x121/0x190 drivers/base/dd.c:799
 driver_probe_device+0x37/0x2f0 drivers/base/dd.c:829
 __device_attach_driver+0x205/0x310 drivers/base/dd.c:957
 bus_for_each_drv+0x1bd/0x230 drivers/base/bus.c:462
 __device_attach+0x1c7/0x290 drivers/base/dd.c:1029
 device_initial_probe+0x1a/0x30 drivers/base/dd.c:1078
 bus_probe_device+0x143/0x1d0 drivers/base/bus.c:537
 device_add+0x5c9/0x770 drivers/base/core.c:3692
 hid_add_device+0x273/0x2f0 drivers/hid/hid-core.c:2907
 uhid_device_add_worker+0x2b/0xa0 drivers/hid/uhid.c:73
 process_one_work kernel/workqueue.c:3238 [inline]
 process_scheduled_works+0x4cb/0x9d0 kernel/workqueue.c:3321
 worker_thread+0x582/0x770 kernel/workqueue.c:3402
 kthread+0x489/0x510 kernel/kthread.c:464
 ret_from_fork+0xda/0x150 arch/x86/kernel/process.c:148
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245

read to 0xffffffff88e3c510 of 8 bytes by task 13176 on cpu 1:
 data_make_reusable kernel/printk/printk_ringbuffer.c:594 [inline]
 data_push_tail+0xfd/0x420 kernel/printk/printk_ringbuffer.c:679
 data_alloc+0xbf/0x2b0 kernel/printk/printk_ringbuffer.c:1054
 prb_reserve+0x808/0xaf0 kernel/printk/printk_ringbuffer.c:1669
 vprintk_store+0x56d/0x860 kernel/printk/printk.c:2326
 vprintk_emit+0x178/0x650 kernel/printk/printk.c:2426
 vprintk_default+0x26/0x30 kernel/printk/printk.c:2465
 vprintk+0x1d/0x30 kernel/printk/printk_safe.c:82
 _printk+0x79/0xa0 kernel/printk/printk.c:2475
 bearer_disable+0x78/0x190 net/tipc/bearer.c:412
 tipc_l2_device_event+0x1cb/0x310 net/tipc/bearer.c:-1
 notifier_call_chain kernel/notifier.c:85 [inline]
 raw_notifier_call_chain+0x6c/0x1b0 kernel/notifier.c:453
 call_netdevice_notifiers_info+0xae/0x100 net/core/dev.c:2230
 call_netdevice_notifiers_extack net/core/dev.c:2268 [inline]
 call_netdevice_notifiers net/core/dev.c:2282 [inline]
 unregister_netdevice_many_notify+0xd9d/0x1690 net/core/dev.c:12077
 unregister_netdevice_many net/core/dev.c:12140 [inline]
 unregister_netdevice_queue+0x1f5/0x220 net/core/dev.c:11984
 unregister_netdevice include/linux/netdevice.h:3379 [inline]
 __tun_detach+0x7db/0xad0 drivers/net/tun.c:620
 tun_detach drivers/net/tun.c:636 [inline]
 tun_chr_close+0x5a/0x100 drivers/net/tun.c:3396
 __fput+0x298/0x650 fs/file_table.c:465
 ____fput+0x1c/0x30 fs/file_table.c:493
 task_work_run+0x131/0x1a0 kernel/task_work.c:227
 resume_user_mode_work include/linux/resume_user_mode.h:50 [inline]
 exit_to_user_mode_loop+0xe4/0x100 kernel/entry/common.c:114
 exit_to_user_mode_prepare include/linux/entry-common.h:330 [inline]
 syscall_exit_to_user_mode_work include/linux/entry-common.h:414 [inline]
 syscall_exit_to_user_mode include/linux/entry-common.h:449 [inline]
 do_syscall_64+0x1d6/0x200 arch/x86/entry/syscall_64.c:100
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

value changed: 0x00000000ffffff32 -> 0x3a383030302e3830

Reported by Kernel Concurrency Sanitizer on:
CPU: 1 UID: 0 PID: 13176 Comm: syz.0.3437 Not tainted 6.16.0-rc5-syzkaller-00053-g8c2e52ebbe88 #0 PREEMPT(voluntary) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025
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