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| author | Eric W. Biederman <ebiederm@xmission.com> | 2012-09-10 22:39:43 -0700 |
|---|---|---|
| committer | Eric W. Biederman <ebiederm@xmission.com> | 2012-09-17 18:08:54 -0700 |
| commit | e1760bd5ffae8cb98cffb030ee8e631eba28f3d8 (patch) | |
| tree | 4694a60b407c418bf7de4b97355dc3bd0e6c6559 /fs/proc | |
| parent | ca57ec0f00c3f139c41bf6b0a5b9bcc95bbb2ad7 (diff) | |
| download | linux-e1760bd5ffae8cb98cffb030ee8e631eba28f3d8.tar.bz2 | |
userns: Convert the audit loginuid to be a kuid
Always store audit loginuids in type kuid_t.
Print loginuids by converting them into uids in the appropriate user
namespace, and then printing the resulting uid.
Modify audit_get_loginuid to return a kuid_t.
Modify audit_set_loginuid to take a kuid_t.
Modify /proc/<pid>/loginuid on read to convert the loginuid into the
user namespace of the opener of the file.
Modify /proc/<pid>/loginud on write to convert the loginuid
rom the user namespace of the opener of the file.
Cc: Al Viro <viro@zeniv.linux.org.uk>
Cc: Eric Paris <eparis@redhat.com>
Cc: Paul Moore <paul@paul-moore.com> ?
Cc: David Miller <davem@davemloft.net>
Signed-off-by: Eric W. Biederman <ebiederm@xmission.com>
Diffstat (limited to 'fs/proc')
| -rw-r--r-- | fs/proc/base.c | 12 |
1 files changed, 10 insertions, 2 deletions
diff --git a/fs/proc/base.c b/fs/proc/base.c index 1b6c84cbdb73..138cff4b05dd 100644 --- a/fs/proc/base.c +++ b/fs/proc/base.c @@ -1089,7 +1089,8 @@ static ssize_t proc_loginuid_read(struct file * file, char __user * buf, if (!task) return -ESRCH; length = scnprintf(tmpbuf, TMPBUFLEN, "%u", - audit_get_loginuid(task)); + from_kuid(file->f_cred->user_ns, + audit_get_loginuid(task))); put_task_struct(task); return simple_read_from_buffer(buf, count, ppos, tmpbuf, length); } @@ -1101,6 +1102,7 @@ static ssize_t proc_loginuid_write(struct file * file, const char __user * buf, char *page, *tmp; ssize_t length; uid_t loginuid; + kuid_t kloginuid; rcu_read_lock(); if (current != pid_task(proc_pid(inode), PIDTYPE_PID)) { @@ -1130,7 +1132,13 @@ static ssize_t proc_loginuid_write(struct file * file, const char __user * buf, goto out_free_page; } - length = audit_set_loginuid(loginuid); + kloginuid = make_kuid(file->f_cred->user_ns, loginuid); + if (!uid_valid(kloginuid)) { + length = -EINVAL; + goto out_free_page; + } + + length = audit_set_loginuid(kloginuid); if (likely(length == 0)) length = count; |