On the 32bit ARM sandbox 'dm ut dm_test_devm_regmap' fails with an abort. This is due to incorrect range checks.
On 32-bit systems the size of size_t and int is both 32 bit. The expression (offset + val_len) is bound to overflow if offset == -1. Add an overflow check. Signed-off-by: Heinrich Schuchardt <[email protected]> --- drivers/core/regmap.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/drivers/core/regmap.c b/drivers/core/regmap.c index 5f98f85cfc..5ccbf9abb8 100644 --- a/drivers/core/regmap.c +++ b/drivers/core/regmap.c @@ -399,7 +399,7 @@ int regmap_raw_read_range(struct regmap *map, uint range_num, uint offset, range = &map->ranges[range_num]; offset <<= map->reg_offset_shift; - if (offset + val_len > range->size) { + if (offset + val_len > range->size || offset + val_len < offset) { debug("%s: offset/size combination invalid\n", __func__); return -ERANGE; } @@ -538,7 +538,7 @@ int regmap_raw_write_range(struct regmap *map, uint range_num, uint offset, range = &map->ranges[range_num]; offset <<= map->reg_offset_shift; - if (offset + val_len > range->size) { + if (offset + val_len > range->size || offset + val_len < offset) { debug("%s: offset/size combination invalid\n", __func__); return -ERANGE; } -- 2.34.1
