mtd: parsers: qcom: Fix leaking of partition name

Add cleanup function as the name variable for the partition name was
allocaed but never freed after the use as the add mtd function
duplicate the name and free the pparts struct as the partition name is
assumed to be static.
The leak was found using kmemleak.

Fixes: 803eb124e1a6 ("mtd: parsers: Add Qcom SMEM parser")
Signed-off-by: Ansuel Smith <ansuelsmth@gmail.com>
Reviewed-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Reviewed-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
Link: https://lore.kernel.org/linux-mtd/20210525230931.30013-1-ansuelsmth@gmail.com

diff --git a/drivers/mtd/parsers/qcomsmempart.c b/drivers/mtd/parsers/qcomsmempart.c
index d9083308f6ba61c24ebc216a38fd81fac75c535c..06a818cd2433f12a294f2748ec468eeb90d0f353 100644 (file)
--- a/drivers/mtd/parsers/qcomsmempart.c
+++ b/drivers/mtd/parsers/qcomsmempart.c
@@ -159,6 +159,15 @@ out_free_parts:
        return ret;
 }
 
+static void parse_qcomsmem_cleanup(const struct mtd_partition *pparts,
+                                  int nr_parts)
+{
+       int i;
+
+       for (i = 0; i < nr_parts; i++)
+               kfree(pparts[i].name);
+}
+
 static const struct of_device_id qcomsmem_of_match_table[] = {
        { .compatible = "qcom,smem-part" },
        {},
@@ -167,6 +176,7 @@ MODULE_DEVICE_TABLE(of, qcomsmem_of_match_table);
 
 static struct mtd_part_parser mtd_parser_qcomsmem = {
        .parse_fn = parse_qcomsmem_part,
+       .cleanup = parse_qcomsmem_cleanup,
        .name = "qcomsmem",
        .of_match_table = qcomsmem_of_match_table,
 };