From: Kang Chen void0red@gmail.com
[ Upstream commit 11f180a5d62a51b484e9648f9b310e1bd50b1a57 ]
devm_kmalloc_array may fails, *fw_vsc_cfg might be null and cause out-of-bounds write in device_property_read_u8_array later.
Fixes: a06347c04c13 ("NFC: Add Intel Fields Peak NFC solution driver") Signed-off-by: Kang Chen void0red@gmail.com Reviewed-by: Krzysztof Kozlowski krzysztof.kozlowski@linaro.org Reviewed-by: Simon Horman simon.horman@corigine.com Link: https://lore.kernel.org/r/20230227093037.907654-1-void0red@gmail.com Signed-off-by: Paolo Abeni pabeni@redhat.com Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/nfc/fdp/i2c.c | 4 ++++ 1 file changed, 4 insertions(+)
diff --git a/drivers/nfc/fdp/i2c.c b/drivers/nfc/fdp/i2c.c index 051c43a2a52f8..5f97dcf08dd07 100644 --- a/drivers/nfc/fdp/i2c.c +++ b/drivers/nfc/fdp/i2c.c @@ -249,6 +249,9 @@ static void fdp_nci_i2c_read_device_properties(struct device *dev, len, sizeof(**fw_vsc_cfg), GFP_KERNEL);
+ if (!*fw_vsc_cfg) + goto alloc_err; + r = device_property_read_u8_array(dev, FDP_DP_FW_VSC_CFG_NAME, *fw_vsc_cfg, len);
@@ -262,6 +265,7 @@ static void fdp_nci_i2c_read_device_properties(struct device *dev, *fw_vsc_cfg = NULL; }
+alloc_err: dev_dbg(dev, "Clock type: %d, clock frequency: %d, VSC: %s", *clock_type, *clock_freq, *fw_vsc_cfg != NULL ? "yes" : "no"); }