Messages in this thread Patch in this message | | | From | Sergey Senozhatsky <> | Subject | [PATCH v4 3/3] printk: check CON_ENABLED in have_callable_console() | Date | Sat, 13 Feb 2016 03:37:12 +0900 |
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have_callable_console() must also test CON_ENABLED bit, not just CON_ANYTIME. We may have disabled CON_ANYTIME console so printk can wrongly assume that it's safe to call_console_drivers().
Signed-off-by: Sergey Senozhatsky <sergey.senozhatsky@gmail.com> --- kernel/printk/printk.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/kernel/printk/printk.c b/kernel/printk/printk.c index 9f0c3e1..9917f69 100644 --- a/kernel/printk/printk.c +++ b/kernel/printk/printk.c @@ -2139,7 +2139,8 @@ static int have_callable_console(void) struct console *con; for_each_console(con) - if (con->flags & CON_ANYTIME) + if ((con->flags & CON_ENABLED) && + (con->flags & CON_ANYTIME)) return 1; return 0; -- 2.7.1
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