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| author | Eric W. Biederman <ebiederm@xmission.com> | 2008-07-12 22:47:53 +0200 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2008-07-12 23:33:41 +0200 |
| commit | 05d81d2222beec7b63ac8c1c8cdb5bb4f82c2bad (patch) | |
| tree | 787aaa15af631f6466476ee3ef6ec6c16888d59e | |
| parent | fbdev: bugfix for multiprocess defio (diff) | |
| download | linux-05d81d2222beec7b63ac8c1c8cdb5bb4f82c2bad.tar.xz linux-05d81d2222beec7b63ac8c1c8cdb5bb4f82c2bad.zip | |
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>
| -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 1bc00b721e9d..be95e55b228b 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; |