diff options
Diffstat (limited to 'drivers/firmware/efi/efi.c')
| -rw-r--r-- | drivers/firmware/efi/efi.c | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/drivers/firmware/efi/efi.c b/drivers/firmware/efi/efi.c index e7ff692f111d..d295be116039 100644 --- a/drivers/firmware/efi/efi.c +++ b/drivers/firmware/efi/efi.c @@ -496,6 +496,12 @@ int efi_mem_desc_lookup(u64 phys_addr, efi_memory_desc_t *out_md) u64 size; u64 end; + /* skip bogus entries (including empty ones) */ + if ((md->phys_addr & (EFI_PAGE_SIZE - 1)) || + (md->num_pages <= 0) || + (md->num_pages > (U64_MAX - md->phys_addr) >> EFI_PAGE_SHIFT)) + continue; + size = md->num_pages << EFI_PAGE_SHIFT; end = md->phys_addr + size; if (phys_addr >= md->phys_addr && phys_addr < end) { |