ASoC: topology: Fix memleak in soc_tplg_link_elems_load()

BugLink: https://bugs.launchpad.net/bugs/1868623
commit 2b2d5c4db732c027a14987cfccf767dac1b45170 upstream.

If soc_tplg_link_config() fails, _link needs to be freed in case of
topology ABI version mismatch. However the current code is returning
directly and ends up leaking memory in this case.
This patch fixes that.

Fixes: 593d9e52f9bb ("ASoC: topology: Add support to configure existing physical DAI links")
Signed-off-by: Dragos Tarcatu <dragos_tarcatu@mentor.com>
Link: https://lore.kernel.org/r/20200207185325.22320-2-dragos_tarcatu@mentor.com
Signed-off-by: Mark Brown <broonie@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Kamal Mostafa <kamal@canonical.com>
Signed-off-by: Khalid Elmously <khalid.elmously@canonical.com>

diff --git a/sound/soc/soc-topology.c b/sound/soc/soc-topology.c
index 72301bcad3bddde53465a7b29f06e5ca0ba60813..0f91b4ed6814816e415029344257b19afb4ca612 100644 (file)
--- a/sound/soc/soc-topology.c
+++ b/sound/soc/soc-topology.c
@@ -2177,8 +2177,11 @@ static int soc_tplg_link_elems_load(struct soc_tplg *tplg,
                }
 
                ret = soc_tplg_link_config(tplg, _link);
-               if (ret < 0)
+               if (ret < 0) {
+                       if (!abi_match)
+                               kfree(_link);
                        return ret;
+               }
 
                /* offset by version-specific struct size and
                 * real priv data size