Mirrors/Ryujinx
1
0
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity Actions

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

Browse source 
* 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
No known key found for this signature in database
GPG key ID: 4AEE18F83AFDEB23
10 changed files with 69 additions and 79 deletions
Download patch file Download diff file Expand all files Collapse all files

16
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;
@ -27,15 +28,14 @@ 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];
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);
Result result = _baseFile.Get.Read(out long bytesRead, offset, new OutBuffer(data), size, readOption);
context.ResponseData.Write(bytesRead);
context.Memory.Write(position, data);
context.ResponseData.Write(bytesRead);
return (ResultCode)result.Value;
return (ResultCode)result.Value;
}
}
[CommandHipc(1)]