[PATCH v2] usb: typec: tipd: Fix dereferencing freed memory 'fw in core.c

From: Dipendra Khadka
Date: Mon Sep 23 2024 - 05:26:43 EST


Smatch reported dereferencing freed memory 'fw' in tps6598x_apply_patch().

Invoking relrease_firmware(fw) just after checking ret.

Fixes: 916b8e5fa73d ("usb: typec: tipd: add error log to provide firmware name and size")
Signed-off-by: Dipendra Khadka <kdipendra88@xxxxxxxxx>
---
v2:
- Updated patch subject.
- Updated patch description.
- Added Fixes tag.
v1:
drivers/usb/typec/tipd/core.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/usb/typec/tipd/core.c b/drivers/usb/typec/tipd/core.c
index ea768b19a7f1..70bf8023ea35 100644
--- a/drivers/usb/typec/tipd/core.c
+++ b/drivers/usb/typec/tipd/core.c
@@ -1191,12 +1191,13 @@ static int tps6598x_apply_patch(struct tps6598x *tps)
dev_info(tps->dev, "Firmware update succeeded\n");

release_fw:
- release_firmware(fw);
if (ret) {
dev_err(tps->dev, "Failed to write patch %s of %zu bytes\n",
firmware_name, fw->size);
}

+ relrease_firmware(fw);
+
return ret;
};

--
2.43.0