27 October 2023 by Phillip JohnstonThere have been several recent instances where Arm GCC toolchain compiler bugs rendered stack smashing protection incomplete or easily defeated. 32-bit Arm Error: Comparison Against the Address, not the Value We have written about implementing stack smashing protection for microcontrollers. Someone commented on that article pointing out that stack smashing protection in the GNU ARM compiler has been broken for quite a while: safe version seem to be up to 8.3.1, and after 10.2.1. Details about the problem can be found in the write-up linked in the comment: Faulty Stack Smashing Protection on ARM Systems. …
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