diff options
| author | Eric W. Biederman <ebiederm@xmission.com> | 2013-01-30 18:50:54 -0800 |
|---|---|---|
| committer | Eric W. Biederman <ebiederm@xmission.com> | 2013-02-13 06:00:52 -0800 |
| commit | 9fd973e085f7759f710603422b2e11ad5f2e000d (patch) | |
| tree | ab037487925db629c9e3c5b45475f0e97954fd1d /fs/coda/psdev.c | |
| parent | a0a5386ac6400493cc2eb8b58583e56af0708730 (diff) | |
coda: Restrict coda messages to the initial pid namespace
Remove the slight chance that pids in coda messages will be
interpreted in the wrong pid namespace.
- Explicitly send all pids in coda messages in the initial pid
namespace.
- Only allow mounts from processes in the initial pid namespace.
- Only allow processes in the initial pid namespace to open the coda
character device to communicate with coda.
Cc: Jan Harkes <jaharkes@cs.cmu.edu>
Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com>
Diffstat (limited to 'fs/coda/psdev.c')
| -rw-r--r-- | fs/coda/psdev.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/fs/coda/psdev.c b/fs/coda/psdev.c index 761d5b31b18d..dd60f905d4fe 100644 --- a/fs/coda/psdev.c +++ b/fs/coda/psdev.c @@ -37,6 +37,7 @@ #include <linux/list.h> #include <linux/mutex.h> #include <linux/device.h> +#include <linux/pid_namespace.h> #include <asm/io.h> #include <asm/poll.h> #include <asm/uaccess.h> @@ -266,6 +267,9 @@ static int coda_psdev_open(struct inode * inode, struct file * file) struct venus_comm *vcp; int idx, err; + if (task_active_pid_ns(current) != &init_pid_ns) + return -EINVAL; + idx = iminor(inode); if (idx < 0 || idx >= MAX_CODADEVS) return -ENODEV; |