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nfc: fdp: add null check of devm_kmalloc_array in fdp_nci_i2c_read_device_properties

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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: a06347c04c ("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>
This commit is contained in:
Kang Chen 2023-02-27 17:30:37 +08:00 committed by Paolo Abeni
parent f99e6d7c4e
commit 11f180a5d6
1 changed files with 4 additions and 0 deletions
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4
drivers/nfc/fdp/i2c.c
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@ -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 alloc_err;
r = device_property_read_u8_array(dev, FDP_DP_FW_VSC_CFG_NAME,
*fw_vsc_cfg, len);
@ -260,6 +263,7 @@ vsc_read_err:
*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");
}