================================================================== BUG: KCSAN: data-race in console_unlock / printk_kthread_func write to 0xffffffff85c348a0 of 1 bytes by task 2417 on cpu 1: console_kthreads_unblock kernel/printk/printk.c:336 [inline] __console_unlock kernel/printk/printk.c:2818 [inline] console_unlock+0x4d5/0x700 kernel/printk/printk.c:3075 do_con_write+0x352e/0x3590 con_write+0x25/0x420 drivers/tty/vt/vt.c:3295 process_output_block drivers/tty/n_tty.c:581 [inline] n_tty_write+0x7ea/0xb40 drivers/tty/n_tty.c:2248 do_tty_write drivers/tty/tty_io.c:1024 [inline] file_tty_write+0x3f9/0x650 drivers/tty/tty_io.c:1095 tty_write+0x24/0x30 drivers/tty/tty_io.c:1116 call_write_iter include/linux/fs.h:2060 [inline] new_sync_write fs/read_write.c:504 [inline] vfs_write+0x71c/0x890 fs/read_write.c:591 ksys_write+0xe8/0x1a0 fs/read_write.c:644 __do_sys_write fs/read_write.c:656 [inline] __se_sys_write fs/read_write.c:653 [inline] __x64_sys_write+0x3e/0x50 fs/read_write.c:653 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x2b/0x70 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x46/0xb0 read to 0xffffffff85c348a0 of 1 bytes by task 1397 on cpu 0: printer_should_wake kernel/printk/printk.c:3731 [inline] printk_kthread_func+0x481/0xb60 kernel/printk/printk.c:3795 kthread+0x1a9/0x1e0 kernel/kthread.c:376 ret_from_fork+0x1f/0x30 value changed: 0x01 -> 0x00 Reported by Kernel Concurrency Sanitizer on: CPU: 0 PID: 1397 Comm: pr/netcon0 Not tainted 5.18.0-syzkaller-11179-gc3a9a3c5f559-dirty #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 ==================================================================