support CAP_PERFMON, CAP_BPF, and CAP_CHECKPOINT_RESTORE
CAP_PERFMON and CAP_BPF were introduced in kernel 5.8: https://kernelnewbies.org/Linux_5.8#Introduce_CAP_BPF_and_CAP_PERFMON_security_capabilities
CAP_CHECKPOINT_RESTORE was merged on the master recently and will be available in the next version of the kernel. 124ea650d3
Signed-off-by: Akihiro Suda <akihiro.suda.cz@hco.ntt.co.jp>
This commit is contained in:
Akihiro Suda
parent
54c53b10d3
commit
6dfbe9b807
2
go.mod
2
go.mod
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@ -18,7 +18,7 @@ require (
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github.com/pkg/errors v0.9.1
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github.com/seccomp/libseccomp-golang v0.9.1
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github.com/sirupsen/logrus v1.6.0
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github.com/syndtr/gocapability v0.0.0-20180916011248-d98352740cb2
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github.com/syndtr/gocapability v0.0.0-20200815063812-42c35b437635
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// NOTE: urfave/cli must be <= v1.22.1 due to a regression: https://github.com/urfave/cli/issues/1092
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github.com/urfave/cli v1.22.1
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github.com/vishvananda/netlink v1.1.0
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6
go.sum
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go.sum
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@ -36,8 +36,6 @@ github.com/moby/sys/mountinfo v0.1.3 h1:KIrhRO14+AkwKvG/g2yIpNMOUVZ02xNhOw8KY1Ws
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github.com/moby/sys/mountinfo v0.1.3/go.mod h1:w2t2Avltqx8vE7gX5l+QiBKxODu2TX0+Syr3h52Tw4o=
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github.com/mrunalp/fileutils v0.0.0-20200520151820-abd8a0e76976 h1:aZQToFSLH8ejFeSkTc3r3L4dPImcj7Ib/KgmkQqbGGg=
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github.com/mrunalp/fileutils v0.0.0-20200520151820-abd8a0e76976/go.mod h1:x8F1gnqOkIEiO4rqoeEEEqQbo7HjGMTvyoq3gej4iT0=
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github.com/opencontainers/runtime-spec v1.0.3-0.20200710190001-3e4195d92445 h1:y8cfsJRmn8g3VkM4IDpusKSgMUZEXhudm/BuYANLozE=
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github.com/opencontainers/runtime-spec v1.0.3-0.20200710190001-3e4195d92445/go.mod h1:jwyrGlmzljRJv/Fgzds9SsS/C5hL+LL3ko9hs6T5lQ0=
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github.com/opencontainers/runtime-spec v1.0.3-0.20200728170252-4d89ac9fbff6 h1:NhsM2gc769rVWDqJvapK37r+7+CBXI8xHhnfnt8uQsg=
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github.com/opencontainers/runtime-spec v1.0.3-0.20200728170252-4d89ac9fbff6/go.mod h1:jwyrGlmzljRJv/Fgzds9SsS/C5hL+LL3ko9hs6T5lQ0=
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github.com/opencontainers/selinux v1.6.0 h1:+bIAS/Za3q5FTwWym4fTB0vObnfCf3G/NC7K6Jx62mY=
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@ -57,8 +55,8 @@ github.com/sirupsen/logrus v1.6.0 h1:UBcNElsrwanuuMsnGSlYmtmgbb23qDR5dG+6X6Oo89I
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github.com/sirupsen/logrus v1.6.0/go.mod h1:7uNnSEd1DgxDLC74fIahvMZmmYsHGZGEOFrfsX/uA88=
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github.com/stretchr/testify v1.2.2 h1:bSDNvY7ZPG5RlJ8otE/7V6gMiyenm9RtJ7IUVIAoJ1w=
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github.com/stretchr/testify v1.2.2/go.mod h1:a8OnRcib4nhh0OaRAV+Yts87kKdq0PP7pXfy6kDkUVs=
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github.com/syndtr/gocapability v0.0.0-20180916011248-d98352740cb2 h1:b6uOv7YOFK0TYG7HtkIgExQo+2RdLuwRft63jn2HWj8=
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github.com/syndtr/gocapability v0.0.0-20180916011248-d98352740cb2/go.mod h1:hkRG7XYTFWNJGYcbNJQlaLq0fg1yr4J4t/NcTQtrfww=
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github.com/syndtr/gocapability v0.0.0-20200815063812-42c35b437635 h1:kdXcSzyDtseVEc4yCz2qF8ZrQvIDBJLl4S1c3GCXmoI=
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github.com/syndtr/gocapability v0.0.0-20200815063812-42c35b437635/go.mod h1:hkRG7XYTFWNJGYcbNJQlaLq0fg1yr4J4t/NcTQtrfww=
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github.com/urfave/cli v1.22.1 h1:+mkCCcOFKPnCmVYVcURKps1Xe+3zP90gSYGNfRkjoIY=
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github.com/urfave/cli v1.22.1/go.mod h1:Gos4lmkARVdJ6EkW0WaNv/tZAAMe9V7XWyB60NtXRu0=
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github.com/vishvananda/netlink v1.1.0 h1:1iyaYNBLmP6L0220aDnYQpo1QEV4t4hJ+xEEhhJH8j0=
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@ -41,7 +41,9 @@ const (
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//go:generate go run enumgen/gen.go
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type Cap int
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// POSIX-draft defined capabilities.
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// POSIX-draft defined capabilities and Linux extensions.
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//
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// Defined in https://github.com/torvalds/linux/blob/master/include/uapi/linux/capability.h
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const (
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// In a system with the [_POSIX_CHOWN_RESTRICTED] option defined, this
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// overrides the restriction of changing file ownership and group
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@ -187,6 +189,7 @@ const (
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// arbitrary SCSI commands
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// Allow setting encryption key on loopback filesystem
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// Allow setting zone reclaim policy
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// Allow everything under CAP_BPF and CAP_PERFMON for backward compatibility
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CAP_SYS_ADMIN = Cap(21)
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// Allow use of reboot()
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@ -211,6 +214,7 @@ const (
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// Allow more than 64hz interrupts from the real-time clock
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// Override max number of consoles on console allocation
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// Override max number of keymaps
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// Control memory reclaim behavior
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CAP_SYS_RESOURCE = Cap(24)
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// Allow manipulation of system clock
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@ -256,8 +260,45 @@ const (
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// Allow preventing system suspends
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CAP_BLOCK_SUSPEND = Cap(36)
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// Allow reading audit messages from the kernel
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// Allow reading the audit log via multicast netlink socket
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CAP_AUDIT_READ = Cap(37)
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// Allow system performance and observability privileged operations
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// using perf_events, i915_perf and other kernel subsystems
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CAP_PERFMON = Cap(38)
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// CAP_BPF allows the following BPF operations:
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// - Creating all types of BPF maps
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// - Advanced verifier features
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// - Indirect variable access
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// - Bounded loops
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// - BPF to BPF function calls
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// - Scalar precision tracking
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// - Larger complexity limits
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// - Dead code elimination
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// - And potentially other features
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// - Loading BPF Type Format (BTF) data
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// - Retrieve xlated and JITed code of BPF programs
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// - Use bpf_spin_lock() helper
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//
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// CAP_PERFMON relaxes the verifier checks further:
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// - BPF progs can use of pointer-to-integer conversions
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// - speculation attack hardening measures are bypassed
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// - bpf_probe_read to read arbitrary kernel memory is allowed
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// - bpf_trace_printk to print kernel memory is allowed
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//
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// CAP_SYS_ADMIN is required to use bpf_probe_write_user.
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//
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// CAP_SYS_ADMIN is required to iterate system wide loaded
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// programs, maps, links, BTFs and convert their IDs to file descriptors.
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//
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// CAP_PERFMON and CAP_BPF are required to load tracing programs.
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// CAP_NET_ADMIN and CAP_BPF are required to load networking programs.
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CAP_BPF = Cap(39)
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// Allow checkpoint/restore related operations.
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// Introduced in kernel 5.9
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CAP_CHECKPOINT_RESTORE = Cap(40)
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)
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var (
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@ -80,6 +80,12 @@ func (c Cap) String() string {
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return "block_suspend"
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case CAP_AUDIT_READ:
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return "audit_read"
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case CAP_PERFMON:
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return "perfmon"
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case CAP_BPF:
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return "bpf"
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case CAP_CHECKPOINT_RESTORE:
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return "checkpoint_restore"
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}
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return "unknown"
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}
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@ -125,5 +131,8 @@ func List() []Cap {
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CAP_WAKE_ALARM,
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CAP_BLOCK_SUSPEND,
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CAP_AUDIT_READ,
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CAP_PERFMON,
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CAP_BPF,
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CAP_CHECKPOINT_RESTORE,
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}
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}
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@ -59,7 +59,7 @@ github.com/shurcooL/sanitized_anchor_name
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# github.com/sirupsen/logrus v1.6.0
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## explicit
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github.com/sirupsen/logrus
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# github.com/syndtr/gocapability v0.0.0-20180916011248-d98352740cb2
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# github.com/syndtr/gocapability v0.0.0-20200815063812-42c35b437635
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## explicit
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github.com/syndtr/gocapability/capability
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# github.com/urfave/cli v1.22.1
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