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On 4.9.x and 4.14.x kernels ebpf verifier bugs allow ebpf programs to access (read/write) random memory. Setting kernel.unprivileged_bpf_disabled=1 mitigates this somewhat until it is fixed upstream. See: - https://lwn.net/Articles/742170 - https://lwn.net/Articles/742169 Signed-off-by: Rolf Neugebauer <rolf.neugebauer@docker.com>
32 lines
989 B
Plaintext
32 lines
989 B
Plaintext
# from Alpine defaults
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net.ipv4.tcp_syncookies = 1
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net.ipv4.conf.default.rp_filter = 1
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net.ipv4.conf.all.rp_filter = 1
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net.ipv4.ping_group_range=999 59999
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# general limits
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vm.max_map_count = 262144
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vm.overcommit_memory = 1
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net.core.somaxconn = 1024
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net.ipv4.neigh.default.gc_thresh1 = 30000
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net.ipv4.neigh.default.gc_thresh2 = 32000
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net.ipv4.neigh.default.gc_thresh3 = 32768
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fs.aio-max-nr = 1048576
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fs.inotify.max_user_watches = 524288
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fs.file-max = 524288
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# for rngd
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kernel.random.write_wakeup_threshold = 3072
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# security restrictions
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kernel.kptr_restrict = 2
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net.ipv4.conf.all.send_redirects = 0
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net.ipv4.conf.default.accept_redirects = 0
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net.ipv4.conf.default.accept_source_route = 0
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net.ipv6.conf.all.accept_redirects = 0
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net.ipv6.conf.default.accept_redirects = 0
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kernel.dmesg_restrict = 1
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kernel.perf_event_paranoid = 3
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fs.protected_hardlinks = 1
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fs.protected_symlinks = 1
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# Prevent ebpf privilege escalation
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# see: https://lwn.net/Articles/742170
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kernel.unprivileged_bpf_disabled=1
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