diff options
| author | Eelco Dolstra <edolstra@gmail.com> | 2017-03-21 18:41:58 +0100 |
|---|---|---|
| committer | Eelco Dolstra <edolstra@gmail.com> | 2017-03-21 18:48:35 +0100 |
| commit | 86721a5f78718caf10c578e9501f8b4d19c0eb44 (patch) | |
| tree | 843681352ebaaefd782e1478be5892c1a5b5e2a6 /nixos | |
| parent | 78bb734452a76c7719f2224e5add5b2a12b3fbf6 (diff) | |
Allow attaching to non-child processes by default
The inability to run strace or gdb is the kind of
developer-unfriendliness that we're used to from OS X, let's not do it
on NixOS.
This restriction can be re-enabled by setting
boot.kernel.sysctl."kernel.yama.ptrace_scope" = 1;
It might be nice to have a NixOS module for enabling hardened defaults.
Xref #14392.
Thanks @abbradar.
Diffstat (limited to 'nixos')
| -rw-r--r-- | nixos/doc/manual/release-notes/rl-1703.xml | 9 | ||||
| -rw-r--r-- | nixos/modules/config/sysctl.nix | 4 |
2 files changed, 4 insertions, 9 deletions
diff --git a/nixos/doc/manual/release-notes/rl-1703.xml b/nixos/doc/manual/release-notes/rl-1703.xml index 3697b69fcf50..cae46258b808 100644 --- a/nixos/doc/manual/release-notes/rl-1703.xml +++ b/nixos/doc/manual/release-notes/rl-1703.xml @@ -97,15 +97,6 @@ following incompatible changes:</para> <listitem> <para> - The Yama LSM is now enabled by default in the kernel, - which prevents ptracing non-child processes. - This means you will not be able to attach gdb to an existing process, - but will need to start that process from gdb (so it is a child). - </para> - </listitem> - - <listitem> - <para> The <literal>stripHash</literal> bash function in <literal>stdenv</literal> changed according to its documentation; it now outputs the stripped name to <literal>stdout</literal> instead of putting it in the variable diff --git a/nixos/modules/config/sysctl.nix b/nixos/modules/config/sysctl.nix index 61b02c5ffa6a..a3f7e8f722f0 100644 --- a/nixos/modules/config/sysctl.nix +++ b/nixos/modules/config/sysctl.nix @@ -64,5 +64,9 @@ in # Removed under grsecurity. boot.kernel.sysctl."kernel.kptr_restrict" = if (config.boot.kernelPackages.kernel.features.grsecurity or false) then null else 1; + + # Disable YAMA by default to allow easy debugging. + boot.kernel.sysctl."kernel.yama.ptrace_scope" = mkDefault 0; + }; } |