archive/rpcs3
1
0
Fork 0
mirror of https://github.com/RPCS3/rpcs3.git synced 2025-07-02 13:01:27 +12:00
Code Issues Projects Releases Packages Wiki Activity Actions

vm_native.cpp: Fix possible weakness of map_self()

Browse source
This commit is contained in:
elad335 2025-04-29 14:26:46 +03:00
parent e449227235
commit 09f71a8ecb
1 changed files with 12 additions and 8 deletions
Download patch file Download diff file Expand all files Collapse all files

20
rpcs3/util/vm_native.cpp
View file

@ -969,20 +969,24 @@ namespace utils
{
void* ptr = m_ptr;
while (!ptr)
for (void* mapped = nullptr; !ptr;)
{
const auto mapped = this->map(nullptr, prot);
if (!mapped)
{
mapped = this->map(nullptr, prot);
}
// Install mapped memory
if (!m_ptr.compare_exchange(ptr, mapped))
{
// Mapped already, nothing to do.
this->unmap(mapped);
}
else
if (m_ptr.compare_exchange(ptr, mapped))
{
ptr = mapped;
}
else if (ptr)
{
// Mapped already, nothing to do.
ensure(ptr != mapped);
this->unmap(mapped);
}
}
return static_cast<u8*>(ptr);