BUG: KCSAN: data-race in _prb_read_valid / prb_reserve write to 0xffffffff86f15250 of 88 bytes by interrupt on cpu 0: prb_reserve+0x6fb/0xaf0 kernel/printk/printk_ringbuffer.c:1691 vprintk_store+0x54e/0x910 kernel/printk/printk.c:2354 vprintk+0x1d/0x30 kernel/printk/printk_safe.c:82 __netdev_start_xmit include/linux/netdevice.h:5455 [inline] netdev_start_xmit include/linux/netdevice.h:5464 [inline] xmit_one net/core/dev.c:4057 [inline] dev_hard_start_xmit+0x10c/0x380 net/core/dev.c:4073 __local_bh_enable_ip+0x79/0x80 kernel/softirq.c:473 process_one_work kernel/workqueue.c:3495 [inline] process_scheduled_works+0x53f/0xa20 kernel/workqueue.c:3578 nbcon_emit_next_record+0x4af/0x1bc0 kernel/printk/nbcon.c:1017 value changed: 0x000000000001378c -> 0x000000000001578c Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/07/2026