[PATCH 4.4 095/112] misc: rtsx: Fix memory leak in rtsx_pci_probe

From: Greg Kroah-Hartman
Date: Tue Oct 27 2020 - 14:23:59 EST


From: Keita Suzuki <keitasuzuki.park@xxxxxxxxxxxxxxxxxxxx>

[ Upstream commit bc28369c6189009b66d9619dd9f09bd8c684bb98 ]

When mfd_add_devices() fail, pcr->slots should also be freed. However,
the current implementation does not free the member, leading to a memory
leak.

Fix this by adding a new goto label that frees pcr->slots.

Signed-off-by: Keita Suzuki <keitasuzuki.park@xxxxxxxxxxxxxxxxxxxx>
Link: https://lore.kernel.org/r/20200909071853.4053-1-keitasuzuki.park@xxxxxxxxxxxxxxxxxxxx
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
---
drivers/mfd/rtsx_pcr.c | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/drivers/mfd/rtsx_pcr.c b/drivers/mfd/rtsx_pcr.c
index 98029ee0959e3..be61f8606a045 100644
--- a/drivers/mfd/rtsx_pcr.c
+++ b/drivers/mfd/rtsx_pcr.c
@@ -1255,12 +1255,14 @@ static int rtsx_pci_probe(struct pci_dev *pcidev,
ret = mfd_add_devices(&pcidev->dev, pcr->id, rtsx_pcr_cells,
ARRAY_SIZE(rtsx_pcr_cells), NULL, 0, NULL);
if (ret < 0)
- goto disable_irq;
+ goto free_slots;

schedule_delayed_work(&pcr->idle_work, msecs_to_jiffies(200));

return 0;

+free_slots:
+ kfree(pcr->slots);
disable_irq:
free_irq(pcr->irq, (void *)pcr);
disable_msi:
--
2.25.1