Skip to content
New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Jump to bottom

config-linux.md: fix seccomp #706

Merged
merged 1 commit into from
Mar 27, 2017
Merged

config-linux.md: fix seccomp #706

Changes from all commits
Commits
Show all changes
1 commit
Select commit
File filter

Filter by extension

Filter by extension
Conversations
Failed to load comments.
Jump to
Jump to file
Failed to load files.
Diff view
Diff view
101 changes: 64 additions & 37 deletions config-linux.md
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -496,43 +496,70 @@ Seccomp provides application sandboxing mechanism in the Linux kernel.
Seccomp configuration allows one to configure actions to take for matched syscalls and furthermore also allows matching on values passed as arguments to syscalls.
For more information about Seccomp, see [Seccomp][seccomp] kernel documentation.
The actions, architectures, and operators are strings that match the definitions in seccomp.h from [libseccomp][] and are translated to corresponding values.
A valid list of constants as of libseccomp v2.3.2 is shown below.

Architecture Constants
* `SCMP_ARCH_X86`
* `SCMP_ARCH_X86_64`
* `SCMP_ARCH_X32`
* `SCMP_ARCH_ARM`
* `SCMP_ARCH_AARCH64`
* `SCMP_ARCH_MIPS`
* `SCMP_ARCH_MIPS64`
* `SCMP_ARCH_MIPS64N32`
* `SCMP_ARCH_MIPSEL`
* `SCMP_ARCH_MIPSEL64`
* `SCMP_ARCH_MIPSEL64N32`
* `SCMP_ARCH_PPC`
* `SCMP_ARCH_PPC64`
* `SCMP_ARCH_PPC64LE`
* `SCMP_ARCH_S390`
* `SCMP_ARCH_S390X`
* `SCMP_ARCH_PARISC`
* `SCMP_ARCH_PARISC64`

Action Constants:
* `SCMP_ACT_KILL`
* `SCMP_ACT_TRAP`
* `SCMP_ACT_ERRNO`
* `SCMP_ACT_TRACE`
* `SCMP_ACT_ALLOW`

Operator Constants:
* `SCMP_CMP_NE`
* `SCMP_CMP_LT`
* `SCMP_CMP_LE`
* `SCMP_CMP_EQ`
* `SCMP_CMP_GE`
* `SCMP_CMP_GT`
* `SCMP_CMP_MASKED_EQ`

**`seccomp`** (object, OPTIONAL)

The following parameters can be specified to setup seccomp:

* **`defaultAction`** *(string, REQUIRED)* - the default action for seccomp. Allowed values are the same as `syscalls[].action`.

* **`architectures`** *(array of strings, OPTIONAL)* - the architecture used for system calls.
A valid list of constants as of libseccomp v2.3.2 is shown below.

* `SCMP_ARCH_X86`
* `SCMP_ARCH_X86_64`
* `SCMP_ARCH_X32`
* `SCMP_ARCH_ARM`
* `SCMP_ARCH_AARCH64`
* `SCMP_ARCH_MIPS`
* `SCMP_ARCH_MIPS64`
* `SCMP_ARCH_MIPS64N32`
* `SCMP_ARCH_MIPSEL`
* `SCMP_ARCH_MIPSEL64`
* `SCMP_ARCH_MIPSEL64N32`
* `SCMP_ARCH_PPC`
* `SCMP_ARCH_PPC64`
* `SCMP_ARCH_PPC64LE`
* `SCMP_ARCH_S390`
* `SCMP_ARCH_S390X`
* `SCMP_ARCH_PARISC`
* `SCMP_ARCH_PARISC64`

* **`syscalls`** *(array of objects, REQUIRED)* - match a syscall in seccomp.

Each entry has the following structure:

* **`names`** *(array of strings, REQUIRED)* - the names of the syscalls.

* **`action`** *(string, REQUIRED)* - the action for seccomp rules.
A valid list of constants as of libseccomp v2.3.2 is shown below.

* `SCMP_ACT_KILL`
* `SCMP_ACT_TRAP`
* `SCMP_ACT_ERRNO`
* `SCMP_ACT_TRACE`
* `SCMP_ACT_ALLOW`

* **`args`** *(array of objects, OPTIONAL)* - the specific syscall in seccomp.

Each entry has the following structure:

* **`index`** *(uint, REQUIRED)* - the index for syscall arguments in seccomp.

* **`value`** *(uint64, REQUIRED)* - the value for syscall arguments in seccomp.

* **`valueTwo`** *(uint64, REQUIRED)* - the value for syscall arguments in seccomp.

* **`op`** *(string, REQUIRED)* - the operator for syscall arguments in seccomp.
A valid list of constants as of libseccomp v2.3.2 is shown below.

* `SCMP_CMP_NE`
* `SCMP_CMP_LT`
* `SCMP_CMP_LE`
* `SCMP_CMP_EQ`
* `SCMP_CMP_GE`
* `SCMP_CMP_GT`
* `SCMP_CMP_MASKED_EQ`

###### Example

Expand Down