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| author | Kirill Tkhai <ktkhai@virtuozzo.com> | 2017-05-02 19:11:52 +0200 |
|---|---|---|
| committer | Eric W. Biederman <ebiederm@xmission.com> | 2017-07-20 14:46:06 +0200 |
| commit | 64db4c7f4c1dde23d47b60f887000e28f82b268f (patch) | |
| tree | e7f344fb2015e7c138fc1d05804da2969c205be9 /kernel/sys.c | |
| parent | userns,pidns: Verify the userns for new pid namespaces (diff) | |
| download | linux-64db4c7f4c1dde23d47b60f887000e28f82b268f.tar.xz linux-64db4c7f4c1dde23d47b60f887000e28f82b268f.zip | |
security: Use user_namespace::level to avoid redundant iterations in cap_capable()
When ns->level is not larger then cred->user_ns->level,
then ns can't be cred->user_ns's descendant, and
there is no a sense to search in parents.
So, break the cycle earlier and skip needless iterations.
v2: Change comment on suggested by Andy Lutomirski.
Signed-off-by: Kirill Tkhai <ktkhai@virtuozzo.com>
Signed-off-by: Eric W. Biederman <ebiederm@xmission.com>
Diffstat (limited to 'kernel/sys.c')
0 files changed, 0 insertions, 0 deletions