diff options
| author | Serge E. Hallyn <serue@us.ibm.com> | 2007-07-17 15:28:17 -0400 |
|---|---|---|
| committer | Linus Torvalds <torvalds@woody.linux-foundation.org> | 2007-07-19 14:05:08 -0700 |
| commit | 626ac545c12e5f9bffe93086d1d03d26c99987ea (patch) | |
| tree | 3ff83cc510f09bd0561b3b2a8b769beda952ad17 /fs | |
| parent | 9550b105b8646f916862aee3ab7b25020ca14159 (diff) | |
user namespace: fix copy_user_ns return value
When a CONFIG_USER_NS=n and a user tries to unshare some namespace other
than the user namespace, the dummy copy_user_ns returns NULL rather than
the old_ns.
This value then gets assigned to task->nsproxy->user_ns, so that a
subsequent setuid, which uses task->nsproxy->user_ns, causes a NULL
pointer deref.
Fix this by returning old_ns.
Signed-off-by: Serge E. Hallyn <serue@us.ibm.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'fs')
0 files changed, 0 insertions, 0 deletions