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Message-Id: <20230226095933.3286710-1-void0red@gmail.com> Date: Sun, 26 Feb 2023 17:59:33 +0800 From: Kang Chen <void0red@...il.com> To: krzysztof.kozlowski@...aro.org Cc: netdev@...r.kernel.org, linux-kernel@...r.kernel.org, Kang Chen <void0red@...il.com> Subject: [PATCH] nfc: fdp: add null check of devm_kmalloc_array in fdp_nci_i2c_read_device_properties devm_kmalloc_array may fails, *fw_vsc_cfg might be null and cause out-of-bounds write in device_property_read_u8_array later. Signed-off-by: Kang Chen <void0red@...il.com> --- drivers/nfc/fdp/i2c.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/drivers/nfc/fdp/i2c.c b/drivers/nfc/fdp/i2c.c index 2d53e0f88..d95d20efa 100644 --- a/drivers/nfc/fdp/i2c.c +++ b/drivers/nfc/fdp/i2c.c @@ -247,6 +247,9 @@ static void fdp_nci_i2c_read_device_properties(struct device *dev, len, sizeof(**fw_vsc_cfg), GFP_KERNEL); + if (!*fw_vsc_cfg) + goto vsc_read_err; + r = device_property_read_u8_array(dev, FDP_DP_FW_VSC_CFG_NAME, *fw_vsc_cfg, len); -- 2.34.1
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