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authorTakashi Iwai <tiwai@suse.de>2008-12-02 00:13:49 +0300
committerLinus Torvalds <torvalds@linux-foundation.org>2008-12-02 06:55:24 +0300
commit36be47d6d8d98f54b6c4f891e9f54fb2bf554584 (patch)
treea9f9e9c5fb1ac2dffe7dc248a823ce5586a5ef09 /drivers/parport/parport_serial.c
parentdc19f9db38295f811d9041bd89b113beccbd763a (diff)
downloadlinux-36be47d6d8d98f54b6c4f891e9f54fb2bf554584.tar.xz
parport_serial: fix array overflow
The netmos_9xx5_combo type assumes that PCI SSID provides always the correct value for the number of parallel and serial ports, but there are indeed broken devices with wrong numbers, which may result in Oops. This patch simply adds the check of the array range. Reference: Novell bnc#447067 https://bugzilla.novell.com/show_bug.cgi?id=447067 Signed-off-by: Takashi Iwai <tiwai@suse.de> 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/parport/parport_serial.c')
-rw-r--r--drivers/parport/parport_serial.c2
1 files changed, 2 insertions, 0 deletions
diff --git a/drivers/parport/parport_serial.c b/drivers/parport/parport_serial.c
index e2e95b36a603..101ed49a2d15 100644
--- a/drivers/parport/parport_serial.c
+++ b/drivers/parport/parport_serial.c
@@ -70,6 +70,8 @@ static int __devinit netmos_parallel_init(struct pci_dev *dev, struct parport_pc
* parallel ports and <S> is the number of serial ports.
*/
card->numports = (dev->subsystem_device & 0xf0) >> 4;
+ if (card->numports > ARRAY_SIZE(card->addr))
+ card->numports = ARRAY_SIZE(card->addr);
return 0;
}