diff options
| author | Guangshuo Li <202321181@mail.sdu.edu.cn> | 2025-09-18 19:44:10 +0800 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2025-09-25 11:16:47 +0200 |
| commit | a417571950f93af945792f24577c14071fb2314c (patch) | |
| tree | 331776c441e74be029ef73f12b308234b5b0750f | |
| parent | 2feeecd7c68500e66b307d83f8d0aeb25c1a4961 (diff) | |
LoongArch: vDSO: Check kcalloc() result in init_vdso()
commit ac398f570724c41e5e039d54e4075519f6af7408 upstream.
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.
Cc: stable@vger.kernel.org
Fixes: 2ed119aef60d ("LoongArch: Set correct size for vDSO code mapping")
Signed-off-by: Guangshuo Li <202321181@mail.sdu.edu.cn>
Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -rw-r--r-- | arch/loongarch/kernel/vdso.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/arch/loongarch/kernel/vdso.c b/arch/loongarch/kernel/vdso.c index 7b888d9085a0..dee1a15d7f4c 100644 --- a/arch/loongarch/kernel/vdso.c +++ b/arch/loongarch/kernel/vdso.c @@ -54,6 +54,9 @@ static int __init init_vdso(void) 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); |