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Add new syscalls in libseccomp 2.3.0 to seccomp default profile

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This adds the following new syscalls that are supported in libseccomp 2.3.0,
including calls added up to kernel 4.5-rc4:
mlock2 - same as mlock but with a flag
copy_file_range - copy file contents, like splice but with reflink support.

The following are not added, and mentioned in docs:
userfaultfd - userspace page fault handling, mainly designed for process migration

The following are not added, only apply to less common architectures:
switch_endian
membarrier
breakpoint
set_tls
I plan to review the other architectures, some of which can now have seccomp
enabled in the build as they are now supported.

Signed-off-by: Justin Cormack <justin.cormack@docker.com>
This commit is contained in:
Justin Cormack 2016-03-16 21:17:32 +00:00
parent f2b1b44de8
commit 96896f2d0b
3 changed files with 21 additions and 0 deletions
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1
docs/security/seccomp.md
View file

@ -127,6 +127,7 @@ the reason each syscall is blocked rather than white-listed.
| `umount2` | Should be a privileged operation. |
| `unshare` | Deny cloning new namespaces for processes. Also gated by `CAP_SYS_ADMIN`, with the exception of `unshare --user`. |
| `uselib` | Older syscall related to shared libraries, unused for a long time. |
| `userfaultfd` | Userspace page fault handling, largely needed for process migration. |
| `ustat` | Obsolete syscall. |
| `vm86` | In kernel x86 real mode virtual machine. Also gated by `CAP_SYS_ADMIN`. |
| `vm86old` | In kernel x86 real mode virtual machine. Also gated by `CAP_SYS_ADMIN`. |

10
profiles/seccomp/default.json
View file

@ -113,6 +113,11 @@
"action": "SCMP_ACT_ALLOW",
"args": []
},
{
"name": "copy_file_range",
"action": "SCMP_ACT_ALLOW",
"args": []
},
{
"name": "creat",
"action": "SCMP_ACT_ALLOW",
@ -713,6 +718,11 @@
"action": "SCMP_ACT_ALLOW",
"args": []
},
{
"name": "mlock2",
"action": "SCMP_ACT_ALLOW",
"args": []
},
{
"name": "mlockall",
"action": "SCMP_ACT_ALLOW",

10
profiles/seccomp/seccomp_default.go
View file

@ -145,6 +145,11 @@ var DefaultProfile = &types.Seccomp{
Action: types.ActAllow,
Args: []*types.Arg{},
},
{
Name: "copy_file_range",
Action: types.ActAllow,
Args: []*types.Arg{},
},
{
Name: "creat",
Action: types.ActAllow,
@ -745,6 +750,11 @@ var DefaultProfile = &types.Seccomp{
Action: types.ActAllow,
Args: []*types.Arg{},
},
{
Name: "mlock2",
Action: types.ActAllow,
Args: []*types.Arg{},
},
{
Name: "mlockall",
Action: types.ActAllow,