diff options
author | Eric W. Biederman <ebiederm@xmission.com> | 2008-07-12 16:47:53 -0400 |
---|---|---|
committer | Linus Torvalds <torvalds@linux-foundation.org> | 2008-07-12 17:33:41 -0400 |
commit | 05d81d2222beec7b63ac8c1c8cdb5bb4f82c2bad (patch) | |
tree | 787aaa15af631f6466476ee3ef6ec6c16888d59e /drivers | |
parent | f31ad92f34913043cf008d6e479e92dfbaf02df1 (diff) |
serial8250: sanity check nr_uarts on all paths.
I had 8250.nr_uarts=16 in the boot line of a test kernel and I had a weird
mysterious crash in sysfs. After taking an 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@xmission.com>
Acked-by: Alan Cox <alan@redhat.com>
Cc: <stable@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'drivers')
-rw-r--r-- | 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 1bc00b721e9..be95e55b228 100644 --- a/drivers/serial/8250.c +++ b/drivers/serial/8250.c | |||
@@ -2623,6 +2623,9 @@ static struct console serial8250_console = { | |||
2623 | 2623 | ||
2624 | static int __init serial8250_console_init(void) | 2624 | static int __init serial8250_console_init(void) |
2625 | { | 2625 | { |
2626 | if (nr_uarts > UART_NR) | ||
2627 | nr_uarts = UART_NR; | ||
2628 | |||
2626 | serial8250_isa_init_ports(); | 2629 | serial8250_isa_init_ports(); |
2627 | register_console(&serial8250_console); | 2630 | register_console(&serial8250_console); |
2628 | return 0; | 2631 | return 0; |