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author | Lukasz Pawelczyk <l.pawelczyk@partner.samsung.com> | 2014-03-11 17:07:06 +0100 |
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committer | Casey Schaufler <casey@schaufler-ca.com> | 2014-04-11 14:34:35 -0700 |
commit | 668678185247303450e60df14569f94cf5775fea (patch) | |
tree | 2f2b77d7a2769745699e48685c9dbf26d8dd0c98 /Documentation/security | |
parent | 5663884caab166f87ab8c68ec7c62b1cce85a400 (diff) | |
download | linux-668678185247303450e60df14569f94cf5775fea.tar.bz2 |
Smack: adds smackfs/ptrace interface
This allows to limit ptrace beyond the regular smack access rules.
It adds a smackfs/ptrace interface that allows smack to be configured
to require equal smack labels for PTRACE_MODE_ATTACH access.
See the changes in Documentation/security/Smack.txt below for details.
Signed-off-by: Lukasz Pawelczyk <l.pawelczyk@partner.samsung.com>
Signed-off-by: Rafal Krypa <r.krypa@samsung.com>
Diffstat (limited to 'Documentation/security')
-rw-r--r-- | Documentation/security/Smack.txt | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/Documentation/security/Smack.txt b/Documentation/security/Smack.txt index 7a2d30c132e3..5597917703e0 100644 --- a/Documentation/security/Smack.txt +++ b/Documentation/security/Smack.txt @@ -204,6 +204,16 @@ onlycap these capabilities are effective at for processes with any label. The value is set by writing the desired label to the file or cleared by writing "-" to the file. +ptrace + This is used to define the current ptrace policy + 0 - default: this is the policy that relies on smack access rules. + For the PTRACE_READ a subject needs to have a read access on + object. For the PTRACE_ATTACH a read-write access is required. + 1 - exact: this is the policy that limits PTRACE_ATTACH. Attach is + only allowed when subject's and object's labels are equal. + PTRACE_READ is not affected. Can be overriden with CAP_SYS_PTRACE. + 2 - draconian: this policy behaves like the 'exact' above with an + exception that it can't be overriden with CAP_SYS_PTRACE. revoke-subject Writing a Smack label here sets the access to '-' for all access rules with that subject label. |