Applied, thanks.

Huacai

On Tue, Sep 16, 2025 at 10:57 PM lgs201920130244@gmail.com wrote:

From: Guangshuo Li 202321181@mail.sdu.edu.cn

Add a NULL-pointer check after the kcalloc() call in init_vdso(). If allocation fails, return -ENOMEM to prevent a possible dereference of vdso_info.code_mapping.pages when it is NULL.

Fixes: 2ed119aef60d ("LoongArch: Set correct size for vDSO code mapping") Cc: stable@vger.kernel.org Signed-off-by: Guangshuo Li 202321181@mail.sdu.edu.cn

---

arch/loongarch/kernel/vdso.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/arch/loongarch/kernel/vdso.c b/arch/loongarch/kernel/vdso.c index 10cf1608c7b3..da7a7922fb24 100644 --- a/arch/loongarch/kernel/vdso.c +++ b/arch/loongarch/kernel/vdso.c @@ -53,7 +53,8 @@ static int __init init_vdso(void) vdso_info.size = PAGE_ALIGN(vdso_end - vdso_start); vdso_info.code_mapping.pages = kcalloc(vdso_info.size / PAGE_SIZE, sizeof(struct page *), GFP_KERNEL);

•   if (!vdso_info.code_mapping.pages)
  

•           return -ENOMEM;
    pfn = __phys_to_pfn(__pa_symbol(vdso_info.vdso));
    for (i = 0; i < vdso_info.size / PAGE_SIZE; i++)
            vdso_info.code_mapping.pages[i] = pfn_to_page(pfn + i);
  

-- 2.43.0