Hello,
Miquel Raynal <[email protected]> wrote on Sun, 18 Nov 2018
21:11:47 +0100:
> A Coverity robot reported an integer handling issue
> (OVERFLOW_BEFORE_WIDEN) in the potentially overflowing expression:
>
> (mtd_div_by_ws(mtd->size, mtd) - mtd_div_by_ws(offs, mtd)) *
> mtd_oobavail(mtd, ops)
>
> While such overflow will certainly never happen due to the numbers
> handled, it is cleaner to fix this operation anyway.
>
> The problem is that all the maths include 32-bit quantities, while the
> result is stored in an explicit 64-bit value.
>
> As maxooblen will just be compared with a size_t, let's change the
> type of the variable to a size_t. This will not fix anything but will
> clarify a bit the situation. Then, do an explicit cast to fix Coverity
> warning.
>
> Addresses-Coverity-ID: 184180 ("Integer handling issues")
> Signed-off-by: Miquel Raynal <[email protected]>
> ---
I forgot to add the link to the corresponding Travis-CI job:
https://travis-ci.org/miquelraynal/u-boot/builds/456679982
Thanks,
Miquèl
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