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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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10 changed files with 69 additions and 79 deletions
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17
Ryujinx.HLE/HOS/Services/Bcat/ServiceCreator/IDeliveryCacheDirectoryService.cs
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@ -38,18 +38,17 @@ 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];
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));
Result result = _base.Get.Read(out int entriesRead, MemoryMarshal.Cast<byte, DeliveryCacheDirectoryEntry>(data));
context.ResponseData.Write(entriesRead);
context.Memory.Write(position, data);
context.ResponseData.Write(entriesRead);
return (ResultCode)result.Value;
return (ResultCode)result.Value;
}
}
[CommandHipc(2)]