================================================================== BUG: KCSAN: data-race in console_unlock / printk_kthread_func write to 0xffffffff85c348a0 of 1 bytes by task 17563 on cpu 0: 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 con_install+0x26e/0x2b0 drivers/tty/vt/vt.c:3411 tty_driver_install_tty drivers/tty/tty_io.c:1307 [inline] tty_init_dev+0x76/0x330 drivers/tty/tty_io.c:1419 tty_open_by_driver drivers/tty/tty_io.c:2086 [inline] tty_open+0x6d8/0xb30 drivers/tty/tty_io.c:2133 chrdev_open+0x362/0x3d0 fs/char_dev.c:414 do_dentry_open+0x521/0x850 fs/open.c:824 vfs_open+0x43/0x50 fs/open.c:957 do_open fs/namei.c:3477 [inline] path_openat+0x16cf/0x1b30 fs/namei.c:3610 do_filp_open+0x105/0x220 fs/namei.c:3637 do_sys_openat2+0xb5/0x2a0 fs/open.c:1254 do_sys_open fs/open.c:1270 [inline] __do_sys_openat fs/open.c:1286 [inline] __se_sys_openat fs/open.c:1281 [inline] __x64_sys_openat+0xef/0x110 fs/open.c:1281 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 1396 on cpu 1: 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: 1 PID: 1396 Comm: pr/netcon0 Not tainted 5.18.0-syzkaller-10643-g9d004b2f4fea-dirty #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 ==================================================================