Re: [PATCH] video: fbdev: vermilion: use 64-bit arithmetic instead of 32-bit

[Bartlomiej Zolnierkiewicz]

On Tuesday, February 06, 2018 06:04:24 PM Gustavo A. R. Silva wrote:
> Cast _pitch_ to u64 in order to give the compiler complete information
> about the proper arithmetic to use. Notice that this variable is
> being used in a context that expects an expression of type u64
> (64 bits, unsigned).
> 
> The expression pitch * var->yres_virtual is currently being evaluated
> using 32-bit arithmetic and the result of the operation is being stored
> into variable mem, which is a variable of type u64. Based on that,
> chances are there is a potential integer overflow as a result of the
> operation.
> 
> Addresses-Coverity-ID: 200655 ("Unintentional integer overflow")
> Signed-off-by: Gustavo A. R. Silva <gustavo@xxxxxxxxxxxxxx>

Patch queued for 4.17, thanks.

Best regards,
--
Bartlomiej Zolnierkiewicz
Samsung R&D Institute Poland
Samsung Electronics