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Commit 6e4f2878 authored by Alexander Stein's avatar Alexander Stein Committed by Mark Brown
Browse files

regcache: flat: Require max_registers to be set 



If max_register is unset, regcache_flat_get_index will return 0 and only
memory for 1 unsigned int will be allocated, resulting in writing out
of bounds.

Signed-off-by: default avatarAlexander Stein <alexander.stein@systec-electronic.com>
Signed-off-by: default avatarMark Brown <broonie@kernel.org>
parent f55532a0

drivers/base/regmap/regcache-flat.c

+1 −1
Original line number Diff line number Diff line
@@ -27,7 +27,7 @@ static int regcache_flat_init(struct regmap *map) 
	int i;

	unsigned int *cache;



	if (!map || map->reg_stride_order < 0)

	if (!map || map->reg_stride_order < 0 || !map->max_register)

		return -EINVAL;



	map->cache = kcalloc(regcache_flat_get_index(map, map->max_register)