I had 8250.nr_uarts=16 in the boot line of a test kernel and I had a
weird mysterious crash in sysfs. After an taking in depth look I realized
that CONFIG_SERIAL_8250_NR_UARTS was set to 4 and I was walking off
the end of the serial8250_ports array.
Ouch!!!
Don't let this happen to someone else.
Signed-off-by: Eric W. Biederman <ebiederm@xxxxxxxxxxxx>
---
drivers/serial/8250.c | 3 +++
1 files changed, 3 insertions(+), 0 deletions(-)
diff --git a/drivers/serial/8250.c b/drivers/serial/8250.c
index 1bc00b7..be95e55 100644
--- a/drivers/serial/8250.c
+++ b/drivers/serial/8250.c
@@ -2623,6 +2623,9 @@ static struct console serial8250_console = {
static int __init serial8250_console_init(void)
{
+ if (nr_uarts > UART_NR)
+ nr_uarts = UART_NR;
+
serial8250_isa_init_ports();
register_console(&serial8250_console);
return 0;
--
1.5.3.rc6.17.g1911
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