Commit 37b5fff3 authored Nov 28, 2018 by huijin.park Committed by Greg Kroah-Hartman Dec 05, 2019

mtd: spi-nor: cast to u64 to avoid uint overflows



commit 84a1c2109d23df3543d96231c4fee1757299bb1a upstream.

The "params->size" is defined as "u64".
And "info->sector_size" and "info->n_sectors" are defined as
unsigned int and u16.
Thus, u64 data might have strange data(loss data) if the result
overflows an unsigned int.
This patch casts "info->sector_size" to an u64.

Signed-off-by: huijin.park <huijin.park@samsung.com>
Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>
Signed-off-by: Boris Brezillon <boris.brezillon@bootlin.com>
Signed-off-by: Lee Jones <lee.jones@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

parent 4535def7

drivers/mtd/spi-nor/spi-nor.c

+1 −1

Original line number	Diff line number	Diff line
		@@ -2459,7 +2459,7 @@ static int spi_nor_init_params(struct spi_nor *nor,
		memset(params, 0, sizeof(*params));

		/* Set SPI NOR sizes. */
		params->size = info->sector_size * info->n_sectors;
		params->size = (u64)info->sector_size * info->n_sectors;
		params->page_size = info->page_size;

		/* (Fast) Read settings. */