I've backported a number of fixes for security issues affecting 4.9- stable. All of these are already fixed in 4.14-stable and 4.19-stable. Most of the issues involve filesystem validation, and I tested with the reproducers where available. For the BPF fix, I verified that the self-tests (taken from 4.14) didn't regress and temporarily added logging to check that the mitigation is applied when needed. Ben. -- Ben Hutchings, Software Developer Codethink Ltd https://www.codethink.co.uk/ Dale House, 35 Dale Street Manchester, M1 2HF, United Kingdom
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