[PATCH 5.15 615/935] clk/x86: pmc_atom: add kasprintf return value check

5.15-stable review patch.  If anyone has any objections, please let me know.

------------------

From: longlong yan <redacted>

[ Upstream commit 18e9d14cbac33db1c1fb933c26a736eef53dd538 ]

The kasprintf() function returns NULL on memory allocation failure, but
the code in plt_clk_register() was not checking this return value. If
kasprintf fails, init.name would be NULL and could cause NULL pointer
dereference when clkdev_hw_create() uses it.

Add proper error checking for the kasprintf() return value and return
ERR_PTR(-ENOMEM) on failure.

Fixes: 1141d9d08184 ("clk: x86: Add Atom PMC platform clocks")
Signed-off-by: longlong yan <redacted>
Reviewed-by: Brian Masney <redacted>
Signed-off-by: Brian Masney <redacted>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 drivers/clk/x86/clk-pmc-atom.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/drivers/clk/x86/clk-pmc-atom.c b/drivers/clk/x86/clk-pmc-atom.c
index e746e3f8d05a9..00e8f24ff1329 100644
--- a/drivers/clk/x86/clk-pmc-atom.c
+++ b/drivers/clk/x86/clk-pmc-atom.c

@@ -171,6 +171,9 @@ static struct clk_plt *plt_clk_register(struct platform_device *pdev, int id,
 		return ERR_PTR(-ENOMEM);
 
 	init.name =  kasprintf(GFP_KERNEL, "%s_%d", PLT_CLK_NAME_BASE, id);
+	if (!init.name)
+		return ERR_PTR(-ENOMEM);
+
 	init.ops = &plt_clk_ops;
 	init.flags = 0;
 	init.parent_names = parent_names;

-- 
2.53.0