Commit c6fc8364 authored by Thomas Zimmermann's avatar Thomas Zimmermann
Browse files

drm/gem-shmem: Don't store mmap'ed buffers in core dumps 



Set the VM_DONTDUMP flag on mmap'ed VMAs to omit them from core
dumps. It's display-buffer memory; who knows what secrets these
buffers contain.

Signed-off-by: default avatarThomas Zimmermann <tzimmermann@suse.de>
Reviewed-by: default avatarChia-I Wu <olvaffe@gmail.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20220209155634.3994-3-tzimmermann@suse.de
parent d315bdbf

drivers/gpu/drm/drm_gem_shmem_helper.c

+1 −1
Original line number Diff line number Diff line
@@ -623,7 +623,7 @@ int drm_gem_shmem_mmap(struct drm_gem_shmem_object *shmem, struct vm_area_struct 
		return ret;

	}



	vma->vm_flags |= VM_PFNMAP | VM_DONTEXPAND;

	vma->vm_flags |= VM_PFNMAP | VM_DONTEXPAND | VM_DONTDUMP;

	vma->vm_page_prot = vm_get_page_prot(vma->vm_flags);

	if (shmem->map_wc)

		vma->vm_page_prot = pgprot_writecombine(vma->vm_page_prot);