PowerPC linux maintainer Michael Ellerman stole this guys security patch to Linux kernel in very rude way: https://ariel-miculas.github.io/How-I-got-robbed-of-my-first-kernel-contribution/
Ariel Miculas wrote: "I spent a lot of time and effort doing root cause analysis, fixing the bug, testing and validating the fix, getting feedback from other engineers at my company, adapting the fix to the latest kernel version, and sending two different patches to Michael Ellerman, the PowerPC maintainer. Instead of accepting my patch or guiding me towards a better solution, he went ahead and implemented his own fix, giving me credit only for reporting the issue"