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authorEric W. Biederman <ebiederm@xmission.com>2012-03-04 05:21:47 +0100
committerEric W. Biederman <ebiederm@xmission.com>2012-05-03 12:28:51 +0200
commit5af662030e5db1a5560fd917250d5d688a6be586 (patch)
treec648c0bf8afe4571cf13b098bd6e24fbce86789c /kernel/ptrace.c
parentuserns: Convert setting and getting uid and gid system calls to use kuid and ... (diff)
downloadlinux-5af662030e5db1a5560fd917250d5d688a6be586.tar.xz
linux-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.c13
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;