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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: Thomas Zimmermann <tzimmermann@suse.de>
Reviewed-by: Chia-I Wu <olvaffe@gmail.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20220209155634.3994-3-tzimmermann@suse.de
This commit is contained in:
Thomas Zimmermann 2022-02-09 16:56:34 +01:00
parent d315bdbfeb
commit c6fc836488
1 changed files with 1 additions and 1 deletions
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2
drivers/gpu/drm/drm_gem_shmem_helper.c
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@ -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);