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| author | Erick Archer <erick.archer@gmx.com> | 2024-02-11 12:16:33 +0300 |
|---|---|---|
| committer | Miquel Raynal <miquel.raynal@bootlin.com> | 2024-02-26 13:36:17 +0300 |
| commit | e395036504c4e19d15ba64543a4c3beca373f7a9 (patch) | |
| tree | 9d9d3895fbd17753e02a4515c16232881d212a51 /drivers/mtd | |
| parent | ef6f463599e16924cdd02ce5056ab52879dc008c (diff) | |
| download | linux-e395036504c4e19d15ba64543a4c3beca373f7a9.tar.xz | |
mtd: rawnand: Prefer struct_size over open coded arithmetic
This is an effort to get rid of all multiplications from allocation
functions in order to prevent integer overflows [1].
As the "chip" variable is a pointer to "struct mtk_nfc_nand_chip" and
this structure ends in a flexible array:
struct mtk_nfc_nand_chip {
[...]
u8 sels[] __counted_by(nsels);
};
the preferred way in the kernel is to use the struct_size() helper to
do the arithmetic instead of the argument "size + count * size" in the
devm_kzalloc() function.
This way, the code is more readable and safer.
Link: https://www.kernel.org/doc/html/latest/process/deprecated.html#open-coded-arithmetic-in-allocator-arguments [1]
Link: https://github.com/KSPP/linux/issues/160 [2]
Reviewed-by: Gustavo A. R. Silva <gustavoars@kernel.org>
Signed-off-by: Erick Archer <erick.archer@gmx.com>
Acked-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
Reviewed-by: Matthias Brugger <matthias.bgg@gmail.com>
Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
Link: https://lore.kernel.org/linux-mtd/20240211091633.4545-1-erick.archer@gmx.com
Diffstat (limited to 'drivers/mtd')
| -rw-r--r-- | drivers/mtd/nand/raw/mtk_nand.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/mtd/nand/raw/mtk_nand.c b/drivers/mtd/nand/raw/mtk_nand.c index 60198e33d2d5..17477bb2d48f 100644 --- a/drivers/mtd/nand/raw/mtk_nand.c +++ b/drivers/mtd/nand/raw/mtk_nand.c @@ -1356,7 +1356,7 @@ static int mtk_nfc_nand_chip_init(struct device *dev, struct mtk_nfc *nfc, return -EINVAL; } - chip = devm_kzalloc(dev, sizeof(*chip) + nsels * sizeof(u8), + chip = devm_kzalloc(dev, struct_size(chip, sels, nsels), GFP_KERNEL); if (!chip) return -ENOMEM; |