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efi_loader: Do not leak memory when unlinking a mapping

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As soon as a mapping is unlinked from the list, there are no further
references to it, so it should be freed. If it not unlinked,
update the start address and length.

Signed-off-by: Stefan Brüns <stefan.bruens@rwth-aachen.de>
Reviewed-by: Alexander Graf <agraf@suse.de>
Signed-off-by: Alexander Graf <agraf@suse.de>
This commit is contained in:
Stefan Brüns 2016-10-01 23:32:29 +02:00 committed by Alexander Graf
parent b6a9517275
commit 511d0b97ef
1 changed files with 5 additions and 2 deletions
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7
lib/efi_loader/efi_memory.c
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@ -116,10 +116,13 @@ static int efi_mem_carve_out(struct efi_mem_list *map,
if (map_end == carve_end) {
/* Full overlap, just remove map */
list_del(&map->link);
free(map);
} else {
map->desc.physical_start = carve_end;
map->desc.num_pages = (map_end - carve_end)
>> EFI_PAGE_SHIFT;
}
map_desc->physical_start = carve_end;
map_desc->num_pages = (map_end - carve_end) >> EFI_PAGE_SHIFT;
return (carve_end - carve_start) >> EFI_PAGE_SHIFT;
}