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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
10 changed files with 69 additions and 79 deletions
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14
Ryujinx.HLE/HOS/Services/Fs/FileSystemProxy/IDirectory.cs
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@@ -17,17 +17,17 @@ 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.ResponseData.Write(entriesRead);
context.Memory.Write(bufferPosition, entryBuffer);
context.ResponseData.Write(entriesRead);
return (ResultCode)result.Value;
return (ResultCode)result.Value;
}
}
[CommandHipc(1)]