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clk/x86: pmc_atom: add kasprintf return value check

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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: 1141d9d081 ("clk: x86: Add Atom PMC platform clocks")
Signed-off-by: longlong yan <yanlonglong@kylinos.cn>
Reviewed-by: Brian Masney <bmasney@redhat.com>
Signed-off-by: Brian Masney <bmasney@redhat.com>
This commit is contained in:
longlong yan
2026-07-14 14:51:32 +08:00
committed by Brian Masney
parent 2a97ca25f7
commit 18e9d14cba
1 changed files with 3 additions and 0 deletions
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3
drivers/clk/x86/clk-pmc-atom.c
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@@ -160,6 +160,9 @@ 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;