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powerpc/hvsi: Avoid calculating possibly-invalid address

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Check whether index is within bounds prior to calculating a
possibly-invalid address.

Signed-off-by: Roel Kluin <roel.kluin@gmail.com>
Cc: Bernd Petrovitsch <bernd@firmix.at>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
This commit is contained in:
Roel Kluin 2009-08-06 13:00:37 +00:00 committed by Benjamin Herrenschmidt
parent 6826a57d1a
commit 7286565064
1 changed files with 2 additions and 1 deletions
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3
drivers/char/hvsi.c
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@ -1230,11 +1230,12 @@ static struct tty_driver *hvsi_console_device(struct console *console,
static int __init hvsi_console_setup(struct console *console, char *options) static int __init hvsi_console_setup(struct console *console, char *options)
{ {
struct hvsi_struct *hp = &hvsi_ports[console->index]; struct hvsi_struct *hp;
int ret; int ret;
if (console->index < 0 || console->index >= hvsi_count) if (console->index < 0 || console->index >= hvsi_count)
return -1; return -1;
hp = &hvsi_ports[console->index];
/* give the FSP a chance to change the baud rate when we re-open */ /* give the FSP a chance to change the baud rate when we re-open */
hvsi_close_protocol(hp); hvsi_close_protocol(hp);