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/sys.c | |
| parent | a29c33f4e506e1dae7e0985b6328046535becbf8 (diff) | |
| download | linux-5af662030e5db1a5560fd917250d5d688a6be586.tar.bz2 | |
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/sys.c')
| -rw-r--r-- | kernel/sys.c | 18 |
1 files changed, 8 insertions, 10 deletions
diff --git a/kernel/sys.c b/kernel/sys.c index aff09f208eb3..f484077b6b14 100644 --- a/kernel/sys.c +++ b/kernel/sys.c @@ -131,9 +131,8 @@ static bool set_one_prio_perm(struct task_struct *p) { const struct cred *cred = current_cred(), *pcred = __task_cred(p); - if (pcred->user_ns == cred->user_ns && - (pcred->uid == cred->euid || - pcred->euid == cred->euid)) + if (uid_eq(pcred->uid, cred->euid) || + uid_eq(pcred->euid, cred->euid)) return true; if (ns_capable(pcred->user_ns, CAP_SYS_NICE)) return true; @@ -1582,13 +1581,12 @@ static int check_prlimit_permission(struct task_struct *task) return 0; 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)) return 0; if (ns_capable(tcred->user_ns, CAP_SYS_RESOURCE)) return 0; |