diff options
| author | Eric W. Biederman <ebiederm@xmission.com> | 2012-03-03 20:21:47 -0800 |
|---|---|---|
| committer | Eric W. Biederman <ebiederm@xmission.com> | 2012-05-03 03:28:51 -0700 |
| commit | 5af662030e5db1a5560fd917250d5d688a6be586 (patch) | |
| tree | c648c0bf8afe4571cf13b098bd6e24fbce86789c /kernel/ptrace.c | |
| parent | a29c33f4e506e1dae7e0985b6328046535becbf8 (diff) | |
| download | lwn-5af662030e5db1a5560fd917250d5d688a6be586.tar.gz lwn-5af662030e5db1a5560fd917250d5d688a6be586.zip | |
userns: Convert ptrace, kill, set_priority permission checks to work with kuids and kgids
Update the permission checks to use the new uid_eq and gid_eq helpers
and remove the now unnecessary user_ns equality comparison.
Acked-by: Serge Hallyn <serge.hallyn@canonical.com>
Signed-off-by: Eric W. Biederman <ebiederm@xmission.com>
Diffstat (limited to 'kernel/ptrace.c')
| -rw-r--r-- | kernel/ptrace.c | 13 |
1 files changed, 6 insertions, 7 deletions
diff --git a/kernel/ptrace.c b/kernel/ptrace.c index 24e0a5a94824..a232bb59d93f 100644 --- a/kernel/ptrace.c +++ b/kernel/ptrace.c @@ -198,13 +198,12 @@ int __ptrace_may_access(struct task_struct *task, unsigned int mode) return 0; rcu_read_lock(); tcred = __task_cred(task); - if (cred->user_ns == tcred->user_ns && - (cred->uid == tcred->euid && - cred->uid == tcred->suid && - cred->uid == tcred->uid && - cred->gid == tcred->egid && - cred->gid == tcred->sgid && - cred->gid == tcred->gid)) + if (uid_eq(cred->uid, tcred->euid) && + uid_eq(cred->uid, tcred->suid) && + uid_eq(cred->uid, tcred->uid) && + gid_eq(cred->gid, tcred->egid) && + gid_eq(cred->gid, tcred->sgid) && + gid_eq(cred->gid, tcred->gid)) goto ok; if (ptrace_has_cap(tcred->user_ns, mode)) goto ok; |