Merge branch '2022-04-29-fuzzing-and-asan-fixes'
To quote the author: I've been experimenting with ASAN on sandbox and turned up a few issues that are fixed in this series. Basic ASAN was easy to turn on, but integrating with dlmalloc was messier and fairly intrusive. Even when I had it working, there was only a small redzone between allocations which limits the usefulness. I saw another series on the list by Sean Anderson to enable valgrind which was finding a different set of issues, though there was one overlap that Sean is fixing with "[PATCH] IOMUX: Fix access past end of console_devices". With these issues fixed, I was able to run the dm tests without any ASAN issues. There are a couple of leaks reported at the end, but that's for another day.
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