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authorLinus Torvalds <torvalds@linux-foundation.org>2013-05-11 14:29:11 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2013-05-11 14:29:11 -0700
commitc4cc75c3321cad6f20d1e5325293890255c8a663 (patch)
treef515d034c9d6947bed0467840678aff823747596 /drivers
parent2dbd3cac87250a0d44e07acc86c4224a08522709 (diff)
parent2a0b4be6dd655e24990da1d0811e28b9277f8b12 (diff)
downloadlinux-linaro-stable-c4cc75c3321cad6f20d1e5325293890255c8a663.tar.gz
Merge git://git.infradead.org/users/eparis/audit
Pull audit changes from Eric Paris: "Al used to send pull requests every couple of years but he told me to just start pushing them to you directly. Our touching outside of core audit code is pretty straight forward. A couple of interface changes which hit net/. A simple argument bug calling audit functions in namei.c and the removal of some assembly branch prediction code on ppc" * git://git.infradead.org/users/eparis/audit: (31 commits) audit: fix message spacing printing auid Revert "audit: move kaudit thread start from auditd registration to kaudit init" audit: vfs: fix audit_inode call in O_CREAT case of do_last audit: Make testing for a valid loginuid explicit. audit: fix event coverage of AUDIT_ANOM_LINK audit: use spin_lock in audit_receive_msg to process tty logging audit: do not needlessly take a lock in tty_audit_exit audit: do not needlessly take a spinlock in copy_signal audit: add an option to control logging of passwords with pam_tty_audit audit: use spin_lock_irqsave/restore in audit tty code helper for some session id stuff audit: use a consistent audit helper to log lsm information audit: push loginuid and sessionid processing down audit: stop pushing loginid, uid, sessionid as arguments audit: remove the old depricated kernel interface audit: make validity checking generic audit: allow checking the type of audit message in the user filter audit: fix build break when AUDIT_DEBUG == 2 audit: remove duplicate export of audit_enabled Audit: do not print error when LSMs disabled ...
Diffstat (limited to 'drivers')
-rw-r--r--drivers/tty/tty_audit.c104
1 files changed, 45 insertions, 59 deletions
diff --git a/drivers/tty/tty_audit.c b/drivers/tty/tty_audit.c
index 6953dc82850c..a4fdce74f883 100644
--- a/drivers/tty/tty_audit.c
+++ b/drivers/tty/tty_audit.c
@@ -60,24 +60,22 @@ static void tty_audit_buf_put(struct tty_audit_buf *buf)
tty_audit_buf_free(buf);
}
-static void tty_audit_log(const char *description, struct task_struct *tsk,
- kuid_t loginuid, unsigned sessionid, int major,
- int minor, unsigned char *data, size_t size)
+static void tty_audit_log(const char *description, int major, int minor,
+ unsigned char *data, size_t size)
{
struct audit_buffer *ab;
+ struct task_struct *tsk = current;
+ uid_t uid = from_kuid(&init_user_ns, task_uid(tsk));
+ uid_t loginuid = from_kuid(&init_user_ns, audit_get_loginuid(tsk));
+ u32 sessionid = audit_get_sessionid(tsk);
ab = audit_log_start(NULL, GFP_KERNEL, AUDIT_TTY);
if (ab) {
char name[sizeof(tsk->comm)];
- 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,
- from_kuid(&init_user_ns, uid),
- from_kuid(&init_user_ns, loginuid),
- sessionid,
- major, minor);
+
+ audit_log_format(ab, "%s pid=%u uid=%u auid=%u ses=%u major=%d"
+ " minor=%d comm=", description, tsk->pid, uid,
+ loginuid, sessionid, major, minor);
get_task_comm(name, tsk);
audit_log_untrustedstring(ab, name);
audit_log_format(ab, " data=");
@@ -90,11 +88,9 @@ static void tty_audit_log(const char *description, struct task_struct *tsk,
* tty_audit_buf_push - Push buffered data out
*
* Generate an audit message from the contents of @buf, which is owned by
- * @tsk with @loginuid. @buf->mutex must be locked.
+ * the current task. @buf->mutex must be locked.
*/
-static void tty_audit_buf_push(struct task_struct *tsk, kuid_t loginuid,
- unsigned int sessionid,
- struct tty_audit_buf *buf)
+static void tty_audit_buf_push(struct tty_audit_buf *buf)
{
if (buf->valid == 0)
return;
@@ -102,25 +98,11 @@ static void tty_audit_buf_push(struct task_struct *tsk, kuid_t loginuid,
buf->valid = 0;
return;
}
- tty_audit_log("tty", tsk, loginuid, sessionid, buf->major, buf->minor,
- buf->data, buf->valid);
+ tty_audit_log("tty", buf->major, buf->minor, buf->data, buf->valid);
buf->valid = 0;
}
/**
- * tty_audit_buf_push_current - Push buffered data out
- *
- * Generate an audit message from the contents of @buf, which is owned by
- * the current task. @buf->mutex must be locked.
- */
-static void tty_audit_buf_push_current(struct tty_audit_buf *buf)
-{
- kuid_t auid = audit_get_loginuid(current);
- unsigned int sessionid = audit_get_sessionid(current);
- tty_audit_buf_push(current, auid, sessionid, buf);
-}
-
-/**
* tty_audit_exit - Handle a task exit
*
* Make sure all buffered data is written out and deallocate the buffer.
@@ -130,15 +112,13 @@ void tty_audit_exit(void)
{
struct tty_audit_buf *buf;
- spin_lock_irq(&current->sighand->siglock);
buf = current->signal->tty_audit_buf;
current->signal->tty_audit_buf = NULL;
- spin_unlock_irq(&current->sighand->siglock);
if (!buf)
return;
mutex_lock(&buf->mutex);
- tty_audit_buf_push_current(buf);
+ tty_audit_buf_push(buf);
mutex_unlock(&buf->mutex);
tty_audit_buf_put(buf);
@@ -151,9 +131,8 @@ void tty_audit_exit(void)
*/
void tty_audit_fork(struct signal_struct *sig)
{
- spin_lock_irq(&current->sighand->siglock);
sig->audit_tty = current->signal->audit_tty;
- spin_unlock_irq(&current->sighand->siglock);
+ sig->audit_tty_log_passwd = current->signal->audit_tty_log_passwd;
}
/**
@@ -163,20 +142,21 @@ void tty_audit_tiocsti(struct tty_struct *tty, char ch)
{
struct tty_audit_buf *buf;
int major, minor, should_audit;
+ unsigned long flags;
- spin_lock_irq(&current->sighand->siglock);
+ spin_lock_irqsave(&current->sighand->siglock, flags);
should_audit = current->signal->audit_tty;
buf = current->signal->tty_audit_buf;
if (buf)
atomic_inc(&buf->count);
- spin_unlock_irq(&current->sighand->siglock);
+ spin_unlock_irqrestore(&current->sighand->siglock, flags);
major = tty->driver->major;
minor = tty->driver->minor_start + tty->index;
if (buf) {
mutex_lock(&buf->mutex);
if (buf->major == major && buf->minor == minor)
- tty_audit_buf_push_current(buf);
+ tty_audit_buf_push(buf);
mutex_unlock(&buf->mutex);
tty_audit_buf_put(buf);
}
@@ -187,24 +167,20 @@ void tty_audit_tiocsti(struct tty_struct *tty, char ch)
auid = audit_get_loginuid(current);
sessionid = audit_get_sessionid(current);
- tty_audit_log("ioctl=TIOCSTI", current, auid, sessionid, major,
- minor, &ch, 1);
+ tty_audit_log("ioctl=TIOCSTI", major, minor, &ch, 1);
}
}
/**
- * tty_audit_push_task - Flush task's pending audit data
- * @tsk: task pointer
- * @loginuid: sender login uid
- * @sessionid: sender session id
+ * tty_audit_push_current - Flush current's pending audit data
*
- * Called with a ref on @tsk held. Try to lock sighand and get a
- * reference to the tty audit buffer if available.
+ * Try to lock sighand and get a 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, kuid_t loginuid, u32 sessionid)
+int tty_audit_push_current(void)
{
struct tty_audit_buf *buf = ERR_PTR(-EPERM);
+ struct task_struct *tsk = current;
unsigned long flags;
if (!lock_task_sighand(tsk, &flags))
@@ -225,7 +201,7 @@ int tty_audit_push_task(struct task_struct *tsk, kuid_t loginuid, u32 sessionid)
return PTR_ERR(buf);
mutex_lock(&buf->mutex);
- tty_audit_buf_push(tsk, loginuid, sessionid, buf);
+ tty_audit_buf_push(buf);
mutex_unlock(&buf->mutex);
tty_audit_buf_put(buf);
@@ -243,10 +219,11 @@ static struct tty_audit_buf *tty_audit_buf_get(struct tty_struct *tty,
unsigned icanon)
{
struct tty_audit_buf *buf, *buf2;
+ unsigned long flags;
buf = NULL;
buf2 = NULL;
- spin_lock_irq(&current->sighand->siglock);
+ spin_lock_irqsave(&current->sighand->siglock, flags);
if (likely(!current->signal->audit_tty))
goto out;
buf = current->signal->tty_audit_buf;
@@ -254,7 +231,7 @@ static struct tty_audit_buf *tty_audit_buf_get(struct tty_struct *tty,
atomic_inc(&buf->count);
goto out;
}
- spin_unlock_irq(&current->sighand->siglock);
+ spin_unlock_irqrestore(&current->sighand->siglock, flags);
buf2 = tty_audit_buf_alloc(tty->driver->major,
tty->driver->minor_start + tty->index,
@@ -264,7 +241,7 @@ static struct tty_audit_buf *tty_audit_buf_get(struct tty_struct *tty,
return NULL;
}
- spin_lock_irq(&current->sighand->siglock);
+ spin_lock_irqsave(&current->sighand->siglock, flags);
if (!current->signal->audit_tty)
goto out;
buf = current->signal->tty_audit_buf;
@@ -276,7 +253,7 @@ static struct tty_audit_buf *tty_audit_buf_get(struct tty_struct *tty,
atomic_inc(&buf->count);
/* Fall through */
out:
- spin_unlock_irq(&current->sighand->siglock);
+ spin_unlock_irqrestore(&current->sighand->siglock, flags);
if (buf2)
tty_audit_buf_free(buf2);
return buf;
@@ -292,10 +269,18 @@ void tty_audit_add_data(struct tty_struct *tty, unsigned char *data,
{
struct tty_audit_buf *buf;
int major, minor;
+ int audit_log_tty_passwd;
+ unsigned long flags;
if (unlikely(size == 0))
return;
+ spin_lock_irqsave(&current->sighand->siglock, flags);
+ audit_log_tty_passwd = current->signal->audit_tty_log_passwd;
+ spin_unlock_irqrestore(&current->sighand->siglock, flags);
+ if (!audit_log_tty_passwd && icanon && !L_ECHO(tty))
+ return;
+
if (tty->driver->type == TTY_DRIVER_TYPE_PTY
&& tty->driver->subtype == PTY_TYPE_MASTER)
return;
@@ -309,7 +294,7 @@ void tty_audit_add_data(struct tty_struct *tty, unsigned char *data,
minor = tty->driver->minor_start + tty->index;
if (buf->major != major || buf->minor != minor
|| buf->icanon != icanon) {
- tty_audit_buf_push_current(buf);
+ tty_audit_buf_push(buf);
buf->major = major;
buf->minor = minor;
buf->icanon = icanon;
@@ -325,7 +310,7 @@ void tty_audit_add_data(struct tty_struct *tty, unsigned char *data,
data += run;
size -= run;
if (buf->valid == N_TTY_BUF_SIZE)
- tty_audit_buf_push_current(buf);
+ tty_audit_buf_push(buf);
} while (size != 0);
mutex_unlock(&buf->mutex);
tty_audit_buf_put(buf);
@@ -339,16 +324,17 @@ void tty_audit_add_data(struct tty_struct *tty, unsigned char *data,
void tty_audit_push(struct tty_struct *tty)
{
struct tty_audit_buf *buf;
+ unsigned long flags;
- spin_lock_irq(&current->sighand->siglock);
+ spin_lock_irqsave(&current->sighand->siglock, flags);
if (likely(!current->signal->audit_tty)) {
- spin_unlock_irq(&current->sighand->siglock);
+ spin_unlock_irqrestore(&current->sighand->siglock, flags);
return;
}
buf = current->signal->tty_audit_buf;
if (buf)
atomic_inc(&buf->count);
- spin_unlock_irq(&current->sighand->siglock);
+ spin_unlock_irqrestore(&current->sighand->siglock, flags);
if (buf) {
int major, minor;
@@ -357,7 +343,7 @@ void tty_audit_push(struct tty_struct *tty)
minor = tty->driver->minor_start + tty->index;
mutex_lock(&buf->mutex);
if (buf->major == major && buf->minor == minor)
- tty_audit_buf_push_current(buf);
+ tty_audit_buf_push(buf);
mutex_unlock(&buf->mutex);
tty_audit_buf_put(buf);
}