Re: [PATCH] cxgb4: fix signed wrap around when decrementing index idx

From: David Miller
Date: Thu Sep 22 2016 - 01:49:37 EST

From: Colin King <colin.king@xxxxxxxxxxxxx>
Date: Tue, 20 Sep 2016 15:48:45 +0100

> From: Colin Ian King <colin.king@xxxxxxxxxxxxx>
> Change predecrement compare to post decrement compare to avoid an
> unsigned integer wrap-around comparison when decrementing idx in
> the while loop.
> For example, when idx is zero, the current situation will
> predecrement idx in the while loop, wrapping idx to the maximum
> signed integer and cause out of bounds reads on rxq_info->msix_tbl[idx].
> Signed-off-by: Colin Ian King <colin.king@xxxxxxxxxxxxx>

This doesn't apply cleanly to the 'net' tree, please respin.