[PATCH] mtd: parsers: tplink_safeloader: fix uninitialized variable bug

[Rafał Miłecki]

On 25.10.2022 17:34, Dan Carpenter wrote:
> On 64 bit systems, the highest 32 bits of the "offset" variable are
> not initialized.  Also the existing code is not endian safe (it will
> fail on big endian systems).  Change the type of "offset" to a u32.
> 
> Fixes: aec4d5f5ffd0 ("mtd: parsers: add TP-Link SafeLoader partitions table parser")
> Signed-off-by: Dan Carpenter <dan.carpenter at oracle.com>
Acked-by: Rafał Miłecki <rafal at milecki.pl>

Thanks


> ---
>   drivers/mtd/parsers/tplink_safeloader.c | 6 +++---
>   1 file changed, 3 insertions(+), 3 deletions(-)
> 
> diff --git a/drivers/mtd/parsers/tplink_safeloader.c b/drivers/mtd/parsers/tplink_safeloader.c
> index 23584a477391..f601e7bd8627 100644
> --- a/drivers/mtd/parsers/tplink_safeloader.c
> +++ b/drivers/mtd/parsers/tplink_safeloader.c
> @@ -23,8 +23,8 @@ static void *mtd_parser_tplink_safeloader_read_table(struct mtd_info *mtd)
>   	struct safeloader_cmn_header hdr;
>   	struct device_node *np;
>   	size_t bytes_read;
> -	size_t offset;
>   	size_t size;
> +	u32 offset;
>   	char *buf;
>   	int err;
>   
> @@ -34,14 +34,14 @@ static void *mtd_parser_tplink_safeloader_read_table(struct mtd_info *mtd)
>   	else
>   		np = of_get_child_by_name(np, "partitions");
>   
> -	if (of_property_read_u32(np, "partitions-table-offset", (u32 *)&offset)) {
> +	if (of_property_read_u32(np, "partitions-table-offset", &offset)) {
>   		pr_err("Failed to get partitions table offset\n");
>   		goto err_put;
>   	}
>   
>   	err = mtd_read(mtd, offset, sizeof(hdr), &bytes_read, (uint8_t *)&hdr);
>   	if (err && !mtd_is_bitflip(err)) {
> -		pr_err("Failed to read from %s at 0x%zx\n", mtd->name, offset);
> +		pr_err("Failed to read from %s at 0x%x\n", mtd->name, offset);
>   		goto err_put;
>   	}
>