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Diffstat (limited to 'Documentation/security/credentials.rst')
| -rw-r--r-- | Documentation/security/credentials.rst | 9 |
1 files changed, 8 insertions, 1 deletions
diff --git a/Documentation/security/credentials.rst b/Documentation/security/credentials.rst index 038a7e19eff9..5bb7125faeee 100644 --- a/Documentation/security/credentials.rst +++ b/Documentation/security/credentials.rst @@ -196,7 +196,7 @@ The Linux kernel supports the following types of credentials: When a process accesses a key, if not already present, it will normally be cached on one of these keyrings for future accesses to find. - For more information on using keys, see Documentation/security/keys.txt. + For more information on using keys, see ``Documentation/security/keys/*``. 5. LSM @@ -451,6 +451,13 @@ checks and hooks done. Both the current and the proposed sets of credentials are available for this purpose as current_cred() will return the current set still at this point. +When replacing the group list, the new list must be sorted before it +is added to the credential, as a binary search is used to test for +membership. In practice, this means :c:func:`groups_sort` should be +called before :c:func:`set_groups` or :c:func:`set_current_groups`. +:c:func:`groups_sort)` must not be called on a ``struct group_list`` which +is shared as it may permute elements as part of the sorting process +even if the array is already sorted. When the credential set is ready, it should be committed to the current process by calling:: |