diff options
Diffstat (limited to 'Kernel/Syscalls')
| -rw-r--r-- | Kernel/Syscalls/thread.cpp | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/Kernel/Syscalls/thread.cpp b/Kernel/Syscalls/thread.cpp index 6ad8e266c7..34d285f417 100644 --- a/Kernel/Syscalls/thread.cpp +++ b/Kernel/Syscalls/thread.cpp @@ -24,6 +24,7 @@ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. */ +#include <AK/Checked.h> #include <AK/String.h> #include <AK/StringBuilder.h> #include <AK/StringView.h> @@ -45,6 +46,9 @@ int Process::sys$create_thread(void* (*entry)(void*), Userspace<const Syscall::S int schedule_priority = params.m_schedule_priority; unsigned stack_size = params.m_stack_size; + if (Checked<FlatPtr>::addition_would_overflow((FlatPtr)params.m_stack_location, stack_size)) + return -EOVERFLOW; + auto user_stack_address = (u8*)params.m_stack_location + stack_size; if (!MM.validate_user_stack(*this, VirtualAddress(user_stack_address - 4))) |