From: John Ogness Date: Tue, 20 Aug 2024 08:35:51 +0206 Subject: [PATCH 25/54] printk: Flush nbcon consoles first on panic Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/6.11/older/patches-6.11-rt7.tar.xz In console_flush_on_panic(), flush the nbcon consoles before flushing legacy consoles. The legacy write() callbacks are not fully safe when oops_in_progress is set. Signed-off-by: John Ogness Reviewed-by: Petr Mladek Link: https://lore.kernel.org/r/20240820063001.36405-26-john.ogness@linutronix.de Signed-off-by: Petr Mladek Signed-off-by: Sebastian Andrzej Siewior --- kernel/printk/printk.c | 3 +++ 1 file changed, 3 insertions(+) --- a/kernel/printk/printk.c +++ b/kernel/printk/printk.c @@ -3270,6 +3270,9 @@ void console_flush_on_panic(enum con_flu if (mode == CONSOLE_REPLAY_ALL) __console_rewind_all(); + if (!have_boot_console) + nbcon_atomic_flush_pending(); + console_flush_all(false, &next_seq, &handover); }