userns: Make credential debugging user namespace safe.
Cc: David Howells <dhowells@redhat.com>
Acked-by: Serge Hallyn <serge.hallyn@canonical.com>
Signed-off-by: Eric W. Biederman <ebiederm@xmission.com>
diff --git a/init/Kconfig b/init/Kconfig
index 448b701..fdabc51 100644
--- a/init/Kconfig
+++ b/init/Kconfig
@@ -936,7 +936,6 @@
depends on FS_POSIX_ACL = n
depends on QUOTA = n
depends on QUOTACTL = n
- depends on DEBUG_CREDENTIALS = n
depends on BSD_PROCESS_ACCT = n
depends on DRM = n
depends on PROC_EVENTS = n
diff --git a/kernel/cred.c b/kernel/cred.c
index de728ac..48cea3d 100644
--- a/kernel/cred.c
+++ b/kernel/cred.c
@@ -799,9 +799,15 @@
atomic_read(&cred->usage),
read_cred_subscribers(cred));
printk(KERN_ERR "CRED: ->*uid = { %d,%d,%d,%d }\n",
- cred->uid, cred->euid, cred->suid, cred->fsuid);
+ from_kuid_munged(&init_user_ns, cred->uid),
+ from_kuid_munged(&init_user_ns, cred->euid),
+ from_kuid_munged(&init_user_ns, cred->suid),
+ from_kuid_munged(&init_user_ns, cred->fsuid));
printk(KERN_ERR "CRED: ->*gid = { %d,%d,%d,%d }\n",
- cred->gid, cred->egid, cred->sgid, cred->fsgid);
+ from_kgid_munged(&init_user_ns, cred->gid),
+ from_kgid_munged(&init_user_ns, cred->egid),
+ from_kgid_munged(&init_user_ns, cred->sgid),
+ from_kgid_munged(&init_user_ns, cred->fsgid));
#ifdef CONFIG_SECURITY
printk(KERN_ERR "CRED: ->security is %p\n", cred->security);
if ((unsigned long) cred->security >= PAGE_SIZE &&
