Patch "regmap: Fix memory leak from regmap_register_patch" has been added to the 5.7-stable tree

[Sasha Levin <sashal@xxxxxxxxxx>]

This is a note to let you know that I've just added the patch titled

    regmap: Fix memory leak from regmap_register_patch

to the 5.7-stable tree which can be found at:
    http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
     regmap-fix-memory-leak-from-regmap_register_patch.patch
and it can be found in the queue-5.7 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.



commit a43686a1e62b6f384d7d48cf5f3733a576fabe3f
Author: Charles Keepax <ckeepax@xxxxxxxxxxxxxxxxxxxxx>
Date:   Wed Jun 17 16:21:29 2020 +0100

    regmap: Fix memory leak from regmap_register_patch
    
    [ Upstream commit 95b2c3ec4cb1689db2389c251d39f64490ba641c ]
    
    When a register patch is registered the reg_sequence is copied but the
    memory allocated is never freed. Add a kfree in regmap_exit to clean it
    up.
    
    Fixes: 22f0d90a3482 ("regmap: Support register patch sets")
    Signed-off-by: Charles Keepax <ckeepax@xxxxxxxxxxxxxxxxxxxxx>
    Link: https://lore.kernel.org/r/20200617152129.19655-1-ckeepax@xxxxxxxxxxxxxxxxxxxxx
    Signed-off-by: Mark Brown <broonie@xxxxxxxxxx>
    Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>

diff --git a/drivers/base/regmap/regmap.c b/drivers/base/regmap/regmap.c
index 59f911e577192..508bbd6ea4396 100644
--- a/drivers/base/regmap/regmap.c
+++ b/drivers/base/regmap/regmap.c
@@ -1356,6 +1356,7 @@ void regmap_exit(struct regmap *map)
 	if (map->hwlock)
 		hwspin_lock_free(map->hwlock);
 	kfree_const(map->name);
+	kfree(map->patch);
 	kfree(map);
 }
 EXPORT_SYMBOL_GPL(regmap_exit);