4. Architectural Support for Pointer Taintedness Detection This section presents the design and implementation of the architecture for pointer taintedness detection. Briefly, we extend the existing memory system by adding an additional taintedness bit to each byte, in order to implement the memory ...
The function implementation (.c) is: #include <stdio.h> #include"averaging_filter_header.h" float * averaging_filter(float x[5]) { floaty[5] = { 0. }; floatbuffer[3] = { 0. }; for(int i = 0; i < 5; i++) { memcpy(buffer + 1, buf...
Longjmp buffers: C includes a simple checkpoint/rollback system called setjmp/longjmp. The idiom is to say “setjmp(buffer)” to checkpoint, and say “longjmp(buffer)” to go back to the checkpoint. However, if the attacker can corrupt the state of the buffer, then “longjmp(buffer)” wil...
| | The rules of C pointer arithmetic are such that "p + len" is only well | defined where len <= SIZE. Therefore the above idiom is actually | undefined behaviour. | | For example this could cause problems if some malloc implementation | provides an address for "p" such that "p ...