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kern: fix bugs in MapAlias ipc mappings

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This commit is contained in:
Michael Scire 2020-07-12 18:17:29 -07:00
parent a8d4b10b17
commit e2e5a2ccc2
3 changed files with 11 additions and 9 deletions
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10
libraries/libmesosphere/source/kern_k_page_table_base.cpp
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@ -2144,8 +2144,8 @@ namespace ams::kern {
}
/* Handle the last direct-mapped page. */
if (cur_mapped_addr < mapping_src_end) {
const size_t last_block_size = mapping_src_end - cur_mapped_addr;
if (const KProcessAddress mapped_block_end = aligned_src_start + tot_block_size - cur_block_size; mapped_block_end < mapping_src_end) {
const size_t last_block_size = mapping_src_end - mapped_block_end;
/* Map the last block. */
R_TRY(this->Operate(updater.GetPageList(), cur_mapped_addr, last_block_size / PageSize, cur_block_addr, true, dst_map_properties, OperationType_Map, false));
@ -2153,7 +2153,7 @@ namespace ams::kern {
/* Update tracking extents. */
cur_mapped_addr += last_block_size;
cur_block_addr += last_block_size;
if (aligned_src_start + tot_block_size < aligned_src_end && cur_block_size == last_block_size) {
if (mapped_block_end + cur_block_size < aligned_src_end && cur_block_size == last_block_size) {
traverse_valid = impl.ContinueTraversal(std::addressof(next_entry), std::addressof(context));
MESOSPHERE_ASSERT(traverse_valid);
@ -2256,12 +2256,12 @@ namespace ams::kern {
/* Get aligned extents. */
const KProcessAddress aligned_start = util::AlignDown(GetInteger(address), PageSize);
const KProcessAddress aligned_end = util::AlignUp(GetInteger(address) + size, PageSize);
const size_t aligned_size = aligned_start - aligned_end;
const size_t aligned_size = aligned_end - aligned_start;
const size_t aligned_num_pages = aligned_size / PageSize;
/* Unmap the pages. */
const KPageProperties unmap_properties = { KMemoryPermission_None, false, false, false };
R_TRY(this->Operate(updater.GetPageList(), aligned_start, aligned_size / PageSize, Null<KPhysicalAddress>, false, unmap_properties, OperationType_Unmap, false));
R_TRY(this->Operate(updater.GetPageList(), aligned_start, aligned_num_pages, Null<KPhysicalAddress>, false, unmap_properties, OperationType_Unmap, false));
/* Update memory blocks. */
this->memory_block_manager.Update(std::addressof(allocator), aligned_start, aligned_num_pages, KMemoryState_None, KMemoryPermission_None, KMemoryAttribute_None);