From: Jianglei Nie <niejianglei2021@xxxxxxx>
[ Upstream commit ddf75a86aba2cfb7ec4497e8692b60c8c8fe0ee7 ]
hd44780_probe() allocates a memory chunk for hd with kzalloc() and
makes "lcd->drvdata->hd44780" point to it. When we call hd44780_remove(),
we should release all relevant memory and resource. But "lcd->drvdata
->hd44780" is not released, which will lead to a memory leak.
We should release the "lcd->drvdata->hd44780" in hd44780_remove() to fix
the memory leak bug.
Fixes: 718e05ed92ec ("auxdisplay: Introduce hd44780_common.[ch]")
Reviewed-by: Andy Shevchenko <andriy.shevchenko@xxxxxxxxxxxxxxx>
Reported-by: kernel test robot <lkp@xxxxxxxxx>
Signed-off-by: Jianglei Nie <niejianglei2021@xxxxxxx>
Signed-off-by: Miguel Ojeda <ojeda@xxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
---
drivers/auxdisplay/hd44780.c | 2 ++
1 file changed, 2 insertions(+)
diff --git a/drivers/auxdisplay/hd44780.c b/drivers/auxdisplay/hd44780.c
index 8b2a0eb3f32a4..d56a5d508ccd7 100644
--- a/drivers/auxdisplay/hd44780.c
+++ b/drivers/auxdisplay/hd44780.c
@@ -322,8 +322,10 @@ static int hd44780_probe(struct platform_device *pdev)
static int hd44780_remove(struct platform_device *pdev)
{
struct charlcd *lcd = platform_get_drvdata(pdev);
+ struct hd44780_common *hdc = lcd->drvdata;
charlcd_unregister(lcd);
+ kfree(hdc->hd44780);
kfree(lcd->drvdata);
kfree(lcd);
--
2.39.2
