diff options
| author | Schspa Shi <schspa@gmail.com> | 2022-06-29 21:09:51 +0800 |
|---|---|---|
| committer | Mark Brown <broonie@kernel.org> | 2022-06-30 13:33:21 +0100 |
| commit | a5201d42e2f8a8e8062103170027840ee372742f (patch) | |
| tree | b8974ba6e793501cc02a3e2f4c8d5288671da66b /drivers/base/regmap | |
| parent | 06fae51bb24451927118b4297886ebc8adbad8fa (diff) | |
| download | linux-a5201d42e2f8a8e8062103170027840ee372742f.tar.bz2 | |
regmap: cache: Add extra parameter check in regcache_init
When num_reg_defaults > 0 but reg_defaults is NULL, there will be a
NULL pointer exception.
Current code has no such usage, but as additional hardening, also
check this to prevent any chance of crashing.
Signed-off-by: Schspa Shi <schspa@gmail.com>
Link: https://lore.kernel.org/r/20220629130951.63040-1-schspa@gmail.com
Signed-off-by: Mark Brown <broonie@kernel.org>
Diffstat (limited to 'drivers/base/regmap')
| -rw-r--r-- | drivers/base/regmap/regcache.c | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/drivers/base/regmap/regcache.c b/drivers/base/regmap/regcache.c index ef62ec225d81..362e043e26d8 100644 --- a/drivers/base/regmap/regcache.c +++ b/drivers/base/regmap/regcache.c @@ -133,6 +133,12 @@ int regcache_init(struct regmap *map, const struct regmap_config *config) return -EINVAL; } + if (config->num_reg_defaults && !config->reg_defaults) { + dev_err(map->dev, + "Register defaults number are set without the reg!\n"); + return -EINVAL; + } + for (i = 0; i < config->num_reg_defaults; i++) if (config->reg_defaults[i].reg % map->reg_stride) return -EINVAL; |