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BUG: KCSAN: data-race in data_alloc / prb_reserve

write to 0xffffffff8686c3b8 of 8 bytes by task 29 on cpu 1:
 data_alloc+0x31c/0x390 kernel/printk/printk_ringbuffer.c:1130
 prb_reserve+0x8d7/0xad0 kernel/printk/printk_ringbuffer.c:1724
 vprintk_store+0x53c/0x830 kernel/printk/printk.c:2302
 vprintk_emit+0x15a/0x5c0 kernel/printk/printk.c:2402
 vprintk_deferred kernel/printk/printk.c:4676 [inline]
 _printk_deferred+0x82/0xb0 kernel/printk/printk.c:4685
 ___ratelimit+0x437/0x460 lib/ratelimit.c:86
 __printk_ratelimit+0x1c/0x30 kernel/printk/printk.c:4701
 kauditd_printk_skb kernel/audit.c:582 [inline]
 kauditd_hold_skb+0x63/0x1c0 kernel/audit.c:618
 kauditd_send_queue+0x273/0x2c0 kernel/audit.c:803
 kauditd_thread+0x442/0x680 kernel/audit.c:927
 kthread+0x489/0x510 kernel/kthread.c:463
 ret_from_fork+0x149/0x290 arch/x86/kernel/process.c:158
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:246

read to 0xffffffff8686c3b8 of 8 bytes by task 13185 on cpu 0:
 desc_read kernel/printk/printk_ringbuffer.c:496 [inline]
 desc_push_tail kernel/printk/printk_ringbuffer.c:792 [inline]
 desc_reserve kernel/printk/printk_ringbuffer.c:938 [inline]
 prb_reserve+0x207/0xad0 kernel/printk/printk_ringbuffer.c:1674
 vprintk_store+0x53c/0x830 kernel/printk/printk.c:2302
 vprintk_emit+0x15a/0x5c0 kernel/printk/printk.c:2402
 vprintk_default+0x26/0x30 kernel/printk/printk.c:2441
 vprintk+0x1d/0x30 kernel/printk/printk_safe.c:82
 _printk+0x79/0xa0 kernel/printk/printk.c:2451
 ieee802154_get_dev+0x2b1/0x370 net/ieee802154/socket.c:72
 raw_bind+0x1bd/0x290 net/ieee802154/socket.c:214
 ieee802154_sock_bind+0x64/0x90 net/ieee802154/socket.c:105
 __sys_bind_socket net/socket.c:1874 [inline]
 __sys_bind+0x1d1/0x2a0 net/socket.c:1905
 __do_sys_bind net/socket.c:1910 [inline]
 __se_sys_bind net/socket.c:1908 [inline]
 __x64_sys_bind+0x3f/0x50 net/socket.c:1908
 x64_sys_call+0x2ceb/0x3000 arch/x86/include/generated/asm/syscalls_64.h:50
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xca/0x2b0 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

value changed: 0xfffffffffffcbd50 -> 0x0000000000075d88

Reported by Kernel Concurrency Sanitizer on:
CPU: 0 UID: 0 PID: 13185 Comm: syz.2.3397 Not tainted syzkaller #0 PREEMPT(voluntary) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025
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Unsupported ieee802154 address type: 0