diff options
| author | Eric W. Biederman <ebiederm@xmission.com> | 2012-08-02 04:25:10 -0700 |
|---|---|---|
| committer | Eric W. Biederman <ebiederm@xmission.com> | 2012-11-19 05:57:31 -0800 |
| commit | 49f4d8b93ccf9454284b6f524b96c66d8d7fbccc (patch) | |
| tree | 06540b59a9d302687fd0519239729c1612d0e2b7 /include/linux/pid_namespace.h | |
| parent | ae06c7c83fc6e97ba247a261921c101960f3d28f (diff) | |
| download | lwn-49f4d8b93ccf9454284b6f524b96c66d8d7fbccc.tar.gz lwn-49f4d8b93ccf9454284b6f524b96c66d8d7fbccc.zip | |
pidns: Capture the user namespace and filter ns_last_pid
- Capture the the user namespace that creates the pid namespace
- Use that user namespace to test if it is ok to write to
/proc/sys/kernel/ns_last_pid.
Zhao Hongjiang <zhaohongjiang@huawei.com> noticed I was missing a put_user_ns
in when destroying a pid_ns. I have foloded his patch into this one
so that bisects will work properly.
Acked-by: Serge Hallyn <serge.hallyn@canonical.com>
Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com>
Diffstat (limited to 'include/linux/pid_namespace.h')
| -rw-r--r-- | include/linux/pid_namespace.h | 8 |
1 files changed, 5 insertions, 3 deletions
diff --git a/include/linux/pid_namespace.h b/include/linux/pid_namespace.h index 65e3e87eacc5..c89c9cfcd247 100644 --- a/include/linux/pid_namespace.h +++ b/include/linux/pid_namespace.h @@ -31,6 +31,7 @@ struct pid_namespace { #ifdef CONFIG_BSD_PROCESS_ACCT struct bsd_acct_struct *bacct; #endif + struct user_namespace *user_ns; kgid_t pid_gid; int hide_pid; int reboot; /* group exit code if this pidns was rebooted */ @@ -46,7 +47,8 @@ static inline struct pid_namespace *get_pid_ns(struct pid_namespace *ns) return ns; } -extern struct pid_namespace *copy_pid_ns(unsigned long flags, struct pid_namespace *ns); +extern struct pid_namespace *copy_pid_ns(unsigned long flags, + struct user_namespace *user_ns, struct pid_namespace *ns); extern void zap_pid_ns_processes(struct pid_namespace *pid_ns); extern int reboot_pid_ns(struct pid_namespace *pid_ns, int cmd); extern void put_pid_ns(struct pid_namespace *ns); @@ -59,8 +61,8 @@ static inline struct pid_namespace *get_pid_ns(struct pid_namespace *ns) return ns; } -static inline struct pid_namespace * -copy_pid_ns(unsigned long flags, struct pid_namespace *ns) +static inline struct pid_namespace *copy_pid_ns(unsigned long flags, + struct user_namespace *user_ns, struct pid_namespace *ns) { if (flags & CLONE_NEWPID) ns = ERR_PTR(-EINVAL); |