6.6-stable review patch. If anyone has any objections, please let me know.
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From: Henry Martin bsdhenrymartin@gmail.com
[ Upstream commit 73c46d9a93d071ca69858dea3f569111b03e549e ]
devm_kasprintf() returns NULL when memory allocation fails. Currently, raspberrypi_clk_register() does not check for this case, which results in a NULL pointer dereference.
Add NULL check after devm_kasprintf() to prevent this issue.
Fixes: 93d2725affd6 ("clk: bcm: rpi: Discover the firmware clocks") Signed-off-by: Henry Martin bsdhenrymartin@gmail.com Reviewed-by: Dave Stevenson dave.stevenson@raspberrypi.com Link: https://lore.kernel.org/r/20250402020513.42628-1-bsdhenrymartin@gmail.com Reviewed-by: Stefan Wahren wahrenst@gmx.net Signed-off-by: Stephen Boyd sboyd@kernel.org Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/clk/bcm/clk-raspberrypi.c | 2 ++ 1 file changed, 2 insertions(+)
diff --git a/drivers/clk/bcm/clk-raspberrypi.c b/drivers/clk/bcm/clk-raspberrypi.c index 4d411408e4afe..cc4ca336ac13a 100644 --- a/drivers/clk/bcm/clk-raspberrypi.c +++ b/drivers/clk/bcm/clk-raspberrypi.c @@ -271,6 +271,8 @@ static struct clk_hw *raspberrypi_clk_register(struct raspberrypi_clk *rpi, init.name = devm_kasprintf(rpi->dev, GFP_KERNEL, "fw-clk-%s", rpi_firmware_clk_names[id]); + if (!init.name) + return ERR_PTR(-ENOMEM); init.ops = &raspberrypi_firmware_clk_ops; init.flags = CLK_GET_RATE_NOCACHE;