[PATCH v4 2/5] nvmem: core: verify cell's raw_len

[Dmitry Baryshkov]

Check that the NVMEM cell's raw_len is a aligned to word_size. Otherwise
Otherwise drivers might face incomplete read while accessing the last
part of the NVMEM cell.

Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@xxxxxxxxxx>
---
 drivers/nvmem/core.c | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/drivers/nvmem/core.c b/drivers/nvmem/core.c
index 7fa85b0804db360035d7471002dbf79658d5830b..59885d8b6a19d01f50759f09d453b092d1ec44bb 100644
--- a/drivers/nvmem/core.c
+++ b/drivers/nvmem/core.c
@@ -602,6 +602,14 @@ static int nvmem_cell_info_to_nvmem_cell_entry_nodup(struct nvmem_device *nvmem,
 		return -EINVAL;
 	}
 
+	if (!IS_ALIGNED(cell->raw_len, nvmem->word_size)) {
+		dev_err(&nvmem->dev,
+			"cell %s raw len %zd unaligned to nvmem word size %d\n",
+			cell->name ?: "<unknown>", cell->raw_len,
+			nvmem->word_size);
+		return -EINVAL;
+	}
+
 	return 0;
 }
 

-- 
2.39.5