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| author | Oleg Nesterov <oleg@redhat.com> | 2013-08-08 18:55:32 +0200 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2013-08-08 13:11:39 -0700 |
| commit | 8742f229b635bf1c1c84a3dfe5e47c814c20b5c8 (patch) | |
| tree | 3d9f64cf0c9d705b9f422d137c8067fa2d41f3c8 /include | |
| parent | 55f5bfd4c94b923d965d47f5c1889ef8f98fcef1 (diff) | |
| download | lwn-8742f229b635bf1c1c84a3dfe5e47c814c20b5c8.tar.gz lwn-8742f229b635bf1c1c84a3dfe5e47c814c20b5c8.zip | |
userns: limit the maximum depth of user_namespace->parent chain
Ensure that user_namespace->parent chain can't grow too much.
Currently we use the hardroded 32 as limit.
Reported-by: Andy Lutomirski <luto@amacapital.net>
Signed-off-by: Oleg Nesterov <oleg@redhat.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'include')
| -rw-r--r-- | include/linux/user_namespace.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/include/linux/user_namespace.h b/include/linux/user_namespace.h index b6b215f13b45..14105c26a836 100644 --- a/include/linux/user_namespace.h +++ b/include/linux/user_namespace.h @@ -23,6 +23,7 @@ struct user_namespace { struct uid_gid_map projid_map; atomic_t count; struct user_namespace *parent; + int level; kuid_t owner; kgid_t group; unsigned int proc_inum; |