6.4-stable review patch. If anyone has any objections, please let me know.
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From: Claudiu Beznea claudiu.beznea@microchip.com
[ Upstream commit f941714a7c7698eadb59bc27d34d6d6f38982705 ]
devm_kasprintf() returns a pointer to dynamically allocated memory. Pointer could be NULL in case allocation fails. Check pointer validity. Identified with coccinelle (kmerr.cocci script).
Fixes: 0f04a81784fe ("pinctrl: mcp23s08: Split to three parts: core, I²C, SPI") Signed-off-by: Claudiu Beznea claudiu.beznea@microchip.com Reviewed-by: Andy Shevchenko andriy.shevchenko@linux.intel.com Link: https://lore.kernel.org/r/20230621100409.1608395-1-claudiu.beznea@microchip.... Signed-off-by: Linus Walleij linus.walleij@linaro.org Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/pinctrl/pinctrl-mcp23s08_spi.c | 10 ++++++++++ 1 file changed, 10 insertions(+)
diff --git a/drivers/pinctrl/pinctrl-mcp23s08_spi.c b/drivers/pinctrl/pinctrl-mcp23s08_spi.c index 9ae10318f6f35..ea059b9c5542e 100644 --- a/drivers/pinctrl/pinctrl-mcp23s08_spi.c +++ b/drivers/pinctrl/pinctrl-mcp23s08_spi.c @@ -91,18 +91,28 @@ static int mcp23s08_spi_regmap_init(struct mcp23s08 *mcp, struct device *dev, mcp->reg_shift = 0; mcp->chip.ngpio = 8; mcp->chip.label = devm_kasprintf(dev, GFP_KERNEL, "mcp23s08.%d", addr); + if (!mcp->chip.label) + return -ENOMEM;
config = &mcp23x08_regmap; name = devm_kasprintf(dev, GFP_KERNEL, "%d", addr); + if (!name) + return -ENOMEM; + break;
case MCP_TYPE_S17: mcp->reg_shift = 1; mcp->chip.ngpio = 16; mcp->chip.label = devm_kasprintf(dev, GFP_KERNEL, "mcp23s17.%d", addr); + if (!mcp->chip.label) + return -ENOMEM;
config = &mcp23x17_regmap; name = devm_kasprintf(dev, GFP_KERNEL, "%d", addr); + if (!name) + return -ENOMEM; + break;
case MCP_TYPE_S18: