ASoC: Intel: Skylake: Fix uuid_module memory leak in failure case

In the loop that adds the uuid_module to the uuid_list list, allocated
memory is not properly freed in the error path free uuid_list whenever
any of the memory allocation in the loop fails to avoid memory leak.

Signed-off-by: Pankaj Bharadiya <pankaj.laxminarayan.bharadiya@intel.com>
Signed-off-by: Guneshwor Singh <guneshwor.o.singh@intel.com>
Acked-By: Vinod Koul <vinod.koul@intel.com>
Signed-off-by: Mark Brown <broonie@kernel.org>

1 files changed, 11 insertions, 4 deletions

diff --git a/sound/soc/intel/skylake/skl-sst-utils.c b/sound/soc/intel/skylake/skl-sst-utils.c
index 369ef7ce981c..8ff89280d9fd 100644
--- a/sound/soc/intel/skylake/skl-sst-utils.c
+++ b/sound/soc/intel/skylake/skl-sst-utils.c
@@ -251,6 +251,7 @@ int snd_skl_parse_uuids(struct sst_dsp *ctx, const struct firmware *fw,
         struct uuid_module *module;
         struct firmware stripped_fw;
         unsigned int safe_file;
+        int ret = 0;
 
         /* Get the FW pointer to derive ADSP header */
         stripped_fw.data = fw->data;
@@ -299,8 +300,10 @@ int snd_skl_parse_uuids(struct sst_dsp *ctx, const struct firmware *fw,
 
         for (i = 0; i < num_entry; i++, mod_entry++) {
                 module = kzalloc(sizeof(*module), GFP_KERNEL);
-                if (!module)
-                        return -ENOMEM;
+                if (!module) {
+                        ret = -ENOMEM;
+                        goto free_uuid_list;
+                }
 
                 uuid_bin = (uuid_le *)mod_entry->uuid.id;
                 memcpy(&module->uuid, uuid_bin, sizeof(module->uuid));
@@ -311,8 +314,8 @@ int snd_skl_parse_uuids(struct sst_dsp *ctx, const struct firmware *fw,
                 size = sizeof(int) * mod_entry->instance_max_count;
                 module->instance_id = devm_kzalloc(ctx->dev, size, GFP_KERNEL);
                 if (!module->instance_id) {
-                        kfree(module);
-                        return -ENOMEM;
+                        ret = -ENOMEM;
+                        goto free_uuid_list;
                 }
 
                 list_add_tail(&module->list, &skl->uuid_list);
@@ -323,6 +326,10 @@ int snd_skl_parse_uuids(struct sst_dsp *ctx, const struct firmware *fw,
         }
 
         return 0;
+
+free_uuid_list:
+        skl_freeup_uuid_list(skl);
+        return ret;
 }
 
 void skl_freeup_uuid_list(struct skl_sst *ctx)