Re: [PATCH 2/3] ide: Fix siimage driver accessing beyond array boundary

From: Bartlomiej Zolnierkiewicz
Date: Thu Oct 18 2007 - 18:51:34 EST


On Thursday 18 October 2007, Benjamin Herrenschmidt wrote:
> The siimage use an incorrect construct to access the other drive
> of a pair, causing it to access beyond an array boundary on non-0
> interfaces. This fixes it by using the new ide_get_paired_drive()
> hepler instead.
>
> Signed-off-by: Benjamin Herrenschmidt <benh@xxxxxxxxxxxxxxxxxxx>

applied with patch description fixes

> ---
>
> drivers/ide/pci/siimage.c | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
>
> Index: linux-work/drivers/ide/pci/siimage.c
> ===================================================================
> --- linux-work.orig/drivers/ide/pci/siimage.c 2007-10-18 10:42:56.000000000 +1000
> +++ linux-work/drivers/ide/pci/siimage.c 2007-10-18 10:43:09.000000000 +1000
> @@ -180,7 +180,7 @@ static void sil_set_pio_mode(ide_drive_t
> const u16 data_speed[] = { 0x328a, 0x2283, 0x1104, 0x10c3, 0x10c1 };
>
> ide_hwif_t *hwif = HWIF(drive);
> - ide_drive_t *pair = &hwif->drives[drive->dn ^ 1];
> + ide_drive_t *pair = ide_get_paired_drive(drive);
> u32 speedt = 0;
> u16 speedp = 0;
> unsigned long addr = siimage_seldev(drive, 0x04);
-
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