From: Xiao Kan <814091656@qq.com> stable inclusion from stable-v5.10.252 commit b6117210ed349356f8e6027ff020b4d620bca42b category: bugfix bugzilla: https://atomgit.com/src-openeuler/kernel/issues/14844 CVE: CVE-2026-43287 Reference: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=... -------------------------------- [ Upstream commit 26b4309a3ab82a0697751cde52eb336c29c19035 ] DRM_IOCTL_MODE_CREATEPROPBLOB allows userspace to allocate arbitrary-sized property blobs backed by kernel memory. Currently, the blob data allocation is not accounted to the allocating process's memory cgroup, allowing unprivileged users to trigger unbounded kernel memory consumption and potentially cause system-wide OOM. Mark the property blob data allocation with GFP_KERNEL_ACCOUNT so that the memory is properly charged to the caller's memcg. This ensures existing cgroup memory limits apply and prevents uncontrolled kernel memory growth without introducing additional policy or per-file limits. Signed-off-by: Xiao Kan <814091656@qq.com> Signed-off-by: Xiao Kan <xiao.kan@samsung.com> Link: https://patch.msgid.link/tencent_D12AA2DEDE6F359E1AF59405242FB7A5FD05@qq.com Signed-off-by: Maxime Ripard <mripard@kernel.org> Signed-off-by: Sasha Levin <sashal@kernel.org> Signed-off-by: Zhang Hongtao <zhanghongtao35@huawei.com> --- drivers/gpu/drm/drm_property.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/gpu/drm/drm_property.c b/drivers/gpu/drm/drm_property.c index dc867439f359f..02268f7d62e7a 100644 --- a/drivers/gpu/drm/drm_property.c +++ b/drivers/gpu/drm/drm_property.c @@ -564,7 +564,7 @@ drm_property_create_blob(struct drm_device *dev, size_t length, if (!length || length > INT_MAX - sizeof(struct drm_property_blob)) return ERR_PTR(-EINVAL); - blob = kvzalloc(sizeof(struct drm_property_blob)+length, GFP_KERNEL); + blob = kvzalloc(sizeof(struct drm_property_blob) + length, GFP_KERNEL_ACCOUNT); if (!blob) return ERR_PTR(-ENOMEM); -- 2.43.0