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Fix memory corruption in BCAT and FS Read methods when buffer is larger than needed (#3739)

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* Fix memory corruption in FS Read methods when buffer is larger than needed

* PR feedback

* nit: Don't move this around
This commit is contained in:
gdkchan 2022-10-04 20:12:54 -03:00 committed by GitHub
parent 2068445939
commit 60e16c15b6
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GPG key ID: 4AEE18F83AFDEB23
10 changed files with 69 additions and 79 deletions
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13
Ryujinx.HLE/HOS/Services/Bcat/ServiceCreator/IDeliveryCacheDirectoryService.cs
View file

@ -38,19 +38,18 @@ namespace Ryujinx.HLE.HOS.Services.Bcat.ServiceCreator
// Read() -> (u32, buffer<nn::bcat::DeliveryCacheDirectoryEntry, 6>)
public ResultCode Read(ServiceCtx context)
{
ulong position = context.Request.ReceiveBuff[0].Position;
ulong size = context.Request.ReceiveBuff[0].Size;
ulong bufferAddress = context.Request.ReceiveBuff[0].Position;
ulong bufferLen = context.Request.ReceiveBuff[0].Size;
byte[] data = new byte[size];
Result result = _base.Get.Read(out int entriesRead, MemoryMarshal.Cast<byte, DeliveryCacheDirectoryEntry>(data));
context.Memory.Write(position, data);
using (var region = context.Memory.GetWritableRegion(bufferAddress, (int)bufferLen, true))
{
Result result = _base.Get.Read(out int entriesRead, MemoryMarshal.Cast<byte, DeliveryCacheDirectoryEntry>(region.Memory.Span));
context.ResponseData.Write(entriesRead);
return (ResultCode)result.Value;
}
}
[CommandHipc(2)]
// GetCount() -> u32

13
Ryujinx.HLE/HOS/Services/Bcat/ServiceCreator/IDeliveryCacheFileService.cs
View file

@ -38,21 +38,20 @@ namespace Ryujinx.HLE.HOS.Services.Bcat.ServiceCreator
// Read(u64) -> (u64, buffer<bytes, 6>)
public ResultCode Read(ServiceCtx context)
{
ulong position = context.Request.ReceiveBuff[0].Position;
ulong size = context.Request.ReceiveBuff[0].Size;
ulong bufferAddress = context.Request.ReceiveBuff[0].Position;
ulong bufferLen = context.Request.ReceiveBuff[0].Size;
long offset = context.RequestData.ReadInt64();
byte[] data = new byte[size];
Result result = _base.Get.Read(out long bytesRead, offset, data);
context.Memory.Write(position, data);
using (var region = context.Memory.GetWritableRegion(bufferAddress, (int)bufferLen, true))
{
Result result = _base.Get.Read(out long bytesRead, offset, region.Memory.Span);
context.ResponseData.Write(bytesRead);
return (ResultCode)result.Value;
}
}
[CommandHipc(2)]
// GetSize() -> u64

13
Ryujinx.HLE/HOS/Services/Bcat/ServiceCreator/IDeliveryCacheStorageService.cs
View file

@ -50,19 +50,18 @@ namespace Ryujinx.HLE.HOS.Services.Bcat.ServiceCreator
// EnumerateDeliveryCacheDirectory() -> (u32, buffer<nn::bcat::DirectoryName, 6>)
public ResultCode EnumerateDeliveryCacheDirectory(ServiceCtx context)
{
ulong position = context.Request.ReceiveBuff[0].Position;
ulong size = context.Request.ReceiveBuff[0].Size;
ulong bufferAddress = context.Request.ReceiveBuff[0].Position;
ulong bufferLen = context.Request.ReceiveBuff[0].Size;
byte[] data = new byte[size];
Result result = _base.Get.EnumerateDeliveryCacheDirectory(out int count, MemoryMarshal.Cast<byte, DirectoryName>(data));
context.Memory.Write(position, data);
using (var region = context.Memory.GetWritableRegion(bufferAddress, (int)bufferLen, true))
{
Result result = _base.Get.EnumerateDeliveryCacheDirectory(out int count, MemoryMarshal.Cast<byte, DirectoryName>(region.Memory.Span));
context.ResponseData.Write(count);
return (ResultCode)result.Value;
}
}
protected override void Dispose(bool isDisposing)
{

10
Ryujinx.HLE/HOS/Services/Fs/FileSystemProxy/IDirectory.cs
View file

@ -17,18 +17,18 @@ namespace Ryujinx.HLE.HOS.Services.Fs.FileSystemProxy
// Read() -> (u64 count, buffer<nn::fssrv::sf::IDirectoryEntry, 6, 0> entries)
public ResultCode Read(ServiceCtx context)
{
ulong bufferPosition = context.Request.ReceiveBuff[0].Position;
ulong bufferAddress = context.Request.ReceiveBuff[0].Position;
ulong bufferLen = context.Request.ReceiveBuff[0].Size;
byte[] entryBuffer = new byte[bufferLen];
using (var region = context.Memory.GetWritableRegion(bufferAddress, (int)bufferLen, true))
{
Result result = _baseDirectory.Get.Read(out long entriesRead, new OutBuffer(region.Memory.Span));
Result result = _baseDirectory.Get.Read(out long entriesRead, new OutBuffer(entryBuffer));
context.Memory.Write(bufferPosition, entryBuffer);
context.ResponseData.Write(entriesRead);
return (ResultCode)result.Value;
}
}
[CommandHipc(1)]
// GetEntryCount() -> u64

12
Ryujinx.HLE/HOS/Services/Fs/FileSystemProxy/IFile.cs
View file

@ -19,7 +19,8 @@ namespace Ryujinx.HLE.HOS.Services.Fs.FileSystemProxy
// Read(u32 readOption, u64 offset, u64 size) -> (u64 out_size, buffer<u8, 0x46, 0> out_buf)
public ResultCode Read(ServiceCtx context)
{
ulong position = context.Request.ReceiveBuff[0].Position;
ulong bufferAddress = context.Request.ReceiveBuff[0].Position;
ulong bufferLen = context.Request.ReceiveBuff[0].Size;
ReadOption readOption = context.RequestData.ReadStruct<ReadOption>();
context.RequestData.BaseStream.Position += 4;
@ -27,16 +28,15 @@ namespace Ryujinx.HLE.HOS.Services.Fs.FileSystemProxy
long offset = context.RequestData.ReadInt64();
long size = context.RequestData.ReadInt64();
byte[] data = new byte[context.Request.ReceiveBuff[0].Size];
Result result = _baseFile.Get.Read(out long bytesRead, offset, new OutBuffer(data), size, readOption);
context.Memory.Write(position, data);
using (var region = context.Memory.GetWritableRegion(bufferAddress, (int)bufferLen, true))
{
Result result = _baseFile.Get.Read(out long bytesRead, offset, new OutBuffer(region.Memory.Span), size, readOption);
context.ResponseData.Write(bytesRead);
return (ResultCode)result.Value;
}
}
[CommandHipc(1)]
// Write(u32 writeOption, u64 offset, u64 size, buffer<u8, 0x45, 0>)

8
Ryujinx.HLE/HOS/Services/Fs/FileSystemProxy/IFileSystem.cs
View file

@ -197,13 +197,7 @@ namespace Ryujinx.HLE.HOS.Services.Fs.FileSystemProxy
context.ResponseData.Write(timestamp.Created);
context.ResponseData.Write(timestamp.Modified);
context.ResponseData.Write(timestamp.Accessed);
byte[] data = new byte[8];
// is valid?
data[0] = 1;
context.ResponseData.Write(data);
context.ResponseData.Write(1L); // Is valid?
return (ResultCode)result.Value;
}

16
Ryujinx.HLE/HOS/Services/Fs/FileSystemProxy/IStorage.cs
View file

@ -23,22 +23,22 @@ namespace Ryujinx.HLE.HOS.Services.Fs.FileSystemProxy
if (context.Request.ReceiveBuff.Count > 0)
{
IpcBuffDesc buffDesc = context.Request.ReceiveBuff[0];
ulong bufferAddress = context.Request.ReceiveBuff[0].Position;
ulong bufferLen = context.Request.ReceiveBuff[0].Size;
// Use smaller length to avoid overflows.
if (size > buffDesc.Size)
if (size > bufferLen)
{
size = buffDesc.Size;
size = bufferLen;
}
byte[] data = new byte[size];
Result result = _baseStorage.Get.Read((long)offset, new OutBuffer(data), (long)size);
context.Memory.Write(buffDesc.Position, data);
using (var region = context.Memory.GetWritableRegion(bufferAddress, (int)bufferLen, true))
{
Result result = _baseStorage.Get.Read((long)offset, new OutBuffer(region.Memory.Span), (long)size);
return (ResultCode)result.Value;
}
}
return ResultCode.Success;
}

10
Ryujinx.HLE/HOS/Services/Fs/IFileSystemProxy.cs
View file

@ -500,16 +500,16 @@ namespace Ryujinx.HLE.HOS.Services.Fs
SaveDataSpaceId spaceId = (SaveDataSpaceId)context.RequestData.ReadInt64();
SaveDataFilter filter = context.RequestData.ReadStruct<SaveDataFilter>();
ulong bufferPosition = context.Request.ReceiveBuff[0].Position;
ulong bufferAddress = context.Request.ReceiveBuff[0].Position;
ulong bufferLen = context.Request.ReceiveBuff[0].Size;
byte[] infoBuffer = new byte[bufferLen];
Result result = _baseFileSystemProxy.Get.FindSaveDataWithFilter(out long count, new OutBuffer(infoBuffer), spaceId, in filter);
using (var region = context.Memory.GetWritableRegion(bufferAddress, (int)bufferLen, true))
{
Result result = _baseFileSystemProxy.Get.FindSaveDataWithFilter(out long count, new OutBuffer(region.Memory.Span), spaceId, in filter);
if (result.IsFailure()) return (ResultCode)result.Value;
context.Memory.Write(bufferPosition, infoBuffer);
context.ResponseData.Write(count);
}
return ResultCode.Success;
}

10
Ryujinx.HLE/HOS/Services/Fs/ISaveDataInfoReader.cs
View file

@ -17,18 +17,18 @@ namespace Ryujinx.HLE.HOS.Services.Fs
// ReadSaveDataInfo() -> (u64, buffer<unknown, 6>)
public ResultCode ReadSaveDataInfo(ServiceCtx context)
{
ulong bufferPosition = context.Request.ReceiveBuff[0].Position;
ulong bufferAddress = context.Request.ReceiveBuff[0].Position;
ulong bufferLen = context.Request.ReceiveBuff[0].Size;
byte[] infoBuffer = new byte[bufferLen];
using (var region = context.Memory.GetWritableRegion(bufferAddress, (int)bufferLen, true))
{
Result result = _baseReader.Get.Read(out long readCount, new OutBuffer(region.Memory.Span));
Result result = _baseReader.Get.Read(out long readCount, new OutBuffer(infoBuffer));
context.Memory.Write(bufferPosition, infoBuffer);
context.ResponseData.Write(readCount);
return (ResultCode)result.Value;
}
}
protected override void Dispose(bool isDisposing)
{

13
Ryujinx.HLE/HOS/Services/Ssl/SslService/ISslConnection.cs
View file

@ -142,14 +142,13 @@ namespace Ryujinx.HLE.HOS.Services.Ssl.SslService
// GetHostName(buffer<bytes, 6>) -> u32
public ResultCode GetHostName(ServiceCtx context)
{
ulong hostNameDataPosition = context.Request.ReceiveBuff[0].Position;
ulong hostNameDataSize = context.Request.ReceiveBuff[0].Size;
ulong bufferAddress = context.Request.ReceiveBuff[0].Position;
ulong bufferLen = context.Request.ReceiveBuff[0].Size;
byte[] hostNameData = new byte[hostNameDataSize];
Encoding.ASCII.GetBytes(_hostName, hostNameData);
context.Memory.Write(hostNameDataPosition, hostNameData);
using (var region = context.Memory.GetWritableRegion(bufferAddress, (int)bufferLen, true))
{
Encoding.ASCII.GetBytes(_hostName, region.Memory.Span);
}
context.ResponseData.Write((uint)_hostName.Length);