From e1760bd5ffae8cb98cffb030ee8e631eba28f3d8 Mon Sep 17 00:00:00 2001 From: "Eric W. Biederman" Date: Mon, 10 Sep 2012 22:39:43 -0700 Subject: 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//loginuid on read to convert the loginuid into the user namespace of the opener of the file. Modify /proc//loginud on write to convert the loginuid rom the user namespace of the opener of the file. Cc: Al Viro Cc: Eric Paris Cc: Paul Moore ? Cc: David Miller Signed-off-by: Eric W. Biederman --- drivers/tty/tty_audit.c | 14 ++++++++------ 1 file changed, 8 insertions(+), 6 deletions(-) (limited to 'drivers/tty') diff --git a/drivers/tty/tty_audit.c b/drivers/tty/tty_audit.c index 7c5866920622..5b59bd7f4227 100644 --- a/drivers/tty/tty_audit.c +++ b/drivers/tty/tty_audit.c @@ -61,7 +61,7 @@ static void tty_audit_buf_put(struct tty_audit_buf *buf) } static void tty_audit_log(const char *description, struct task_struct *tsk, - uid_t loginuid, unsigned sessionid, int major, + kuid_t loginuid, unsigned sessionid, int major, int minor, unsigned char *data, size_t size) { struct audit_buffer *ab; @@ -73,7 +73,9 @@ static void tty_audit_log(const char *description, struct task_struct *tsk, audit_log_format(ab, "%s pid=%u uid=%u auid=%u ses=%u " "major=%d minor=%d comm=", description, - tsk->pid, uid, loginuid, sessionid, + tsk->pid, uid, + from_kuid(&init_user_ns, loginuid), + sessionid, major, minor); get_task_comm(name, tsk); audit_log_untrustedstring(ab, name); @@ -89,7 +91,7 @@ static void tty_audit_log(const char *description, struct task_struct *tsk, * Generate an audit message from the contents of @buf, which is owned by * @tsk with @loginuid. @buf->mutex must be locked. */ -static void tty_audit_buf_push(struct task_struct *tsk, uid_t loginuid, +static void tty_audit_buf_push(struct task_struct *tsk, kuid_t loginuid, unsigned int sessionid, struct tty_audit_buf *buf) { @@ -112,7 +114,7 @@ static void tty_audit_buf_push(struct task_struct *tsk, uid_t loginuid, */ static void tty_audit_buf_push_current(struct tty_audit_buf *buf) { - uid_t auid = audit_get_loginuid(current); + kuid_t auid = audit_get_loginuid(current); unsigned int sessionid = audit_get_sessionid(current); tty_audit_buf_push(current, auid, sessionid, buf); } @@ -179,7 +181,7 @@ void tty_audit_tiocsti(struct tty_struct *tty, char ch) } if (should_audit && audit_enabled) { - uid_t auid; + kuid_t auid; unsigned int sessionid; auid = audit_get_loginuid(current); @@ -199,7 +201,7 @@ void tty_audit_tiocsti(struct tty_struct *tty, char ch) * reference to the tty audit buffer if available. * Flush the buffer or return an appropriate error code. */ -int tty_audit_push_task(struct task_struct *tsk, uid_t loginuid, u32 sessionid) +int tty_audit_push_task(struct task_struct *tsk, kuid_t loginuid, u32 sessionid) { struct tty_audit_buf *buf = ERR_PTR(-EPERM); unsigned long flags; -- cgit v1.2.2 From cca080d9b622094831672a136e5ee4f702d116b1 Mon Sep 17 00:00:00 2001 From: "Eric W. Biederman" Date: Tue, 7 Feb 2012 16:53:48 -0800 Subject: userns: Convert audit to work with user namespaces enabled - Explicitly format uids gids in audit messges in the initial user namespace. This is safe because auditd is restrected to be in the initial user namespace. - Convert audit_sig_uid into a kuid_t. - Enable building the audit code and user namespaces at the same time. The net result is that the audit subsystem now uses kuid_t and kgid_t whenever possible making it almost impossible to confuse a raw uid_t with a kuid_t preventing bugs. Cc: Al Viro Cc: Eric Paris Cc: Greg Kroah-Hartman Signed-off-by: Eric W. Biederman --- drivers/tty/tty_audit.c | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-) (limited to 'drivers/tty') diff --git a/drivers/tty/tty_audit.c b/drivers/tty/tty_audit.c index 5b59bd7f4227..b0b39b823ccf 100644 --- a/drivers/tty/tty_audit.c +++ b/drivers/tty/tty_audit.c @@ -69,11 +69,12 @@ static void tty_audit_log(const char *description, struct task_struct *tsk, ab = audit_log_start(NULL, GFP_KERNEL, AUDIT_TTY); if (ab) { char name[sizeof(tsk->comm)]; - uid_t uid = task_uid(tsk); + kuid_t uid = task_uid(tsk); audit_log_format(ab, "%s pid=%u uid=%u auid=%u ses=%u " "major=%d minor=%d comm=", description, - tsk->pid, uid, + tsk->pid, + from_kuid(&init_user_ns, uid), from_kuid(&init_user_ns, loginuid), sessionid, major, minor); -- cgit v1.2.2