Merge pull request #2305 from lioncash/shared
kernel/shared_memory: Sanitize supplied size when unmapping
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commit
580e3564c9
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@ -9,7 +9,6 @@
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#include "core/hle/kernel/errors.h"
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#include "core/hle/kernel/kernel.h"
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#include "core/hle/kernel/shared_memory.h"
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#include "core/memory.h"
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namespace Kernel {
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@ -119,7 +118,15 @@ ResultCode SharedMemory::Map(Process& target_process, VAddr address, MemoryPermi
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ConvertPermissions(permissions));
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}
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ResultCode SharedMemory::Unmap(Process& target_process, VAddr address) {
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ResultCode SharedMemory::Unmap(Process& target_process, VAddr address, u64 unmap_size) {
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if (unmap_size != size) {
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LOG_ERROR(Kernel,
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"Invalid size passed to Unmap. Size must be equal to the size of the "
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"memory managed. Shared memory size=0x{:016X}, Unmap size=0x{:016X}",
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size, unmap_size);
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return ERR_INVALID_SIZE;
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}
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// TODO(Subv): Verify what happens if the application tries to unmap an address that is not
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// mapped to a SharedMemory.
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return target_process.VMManager().UnmapRange(address, size);
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@ -104,11 +104,17 @@ public:
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/**
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* Unmaps a shared memory block from the specified address in system memory
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*
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* @param target_process Process from which to unmap the memory block.
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* @param address Address in system memory where the shared memory block is mapped
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* @param address Address in system memory where the shared memory block is mapped.
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* @param unmap_size The amount of bytes to unmap from this shared memory instance.
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*
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* @return Result code of the unmap operation
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*
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* @pre The given size to unmap must be the same size as the amount of memory managed by
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* the SharedMemory instance itself, otherwise ERR_INVALID_SIZE will be returned.
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*/
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ResultCode Unmap(Process& target_process, VAddr address);
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ResultCode Unmap(Process& target_process, VAddr address, u64 unmap_size);
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/**
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* Gets a pointer to the shared memory block
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@ -1140,7 +1140,7 @@ static ResultCode UnmapSharedMemory(Handle shared_memory_handle, VAddr addr, u64
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return ERR_INVALID_MEMORY_RANGE;
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}
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return shared_memory->Unmap(*current_process, addr);
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return shared_memory->Unmap(*current_process, addr, size);
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}
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static ResultCode QueryProcessMemory(VAddr memory_info_address, VAddr page_info_address,
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