Fix: add missing rcu lock for UST lookup

[lttng-tools.git] / src / bin / lttng-sessiond / cmd.c

diff --git a/src/bin/lttng-sessiond/cmd.c b/src/bin/lttng-sessiond/cmd.c
index 5ec65b78637beaf0904a1c32ef1d25377dbcdc11..456ddeb77d85fd4d1a6f70ca7116494435a12b5e 100644 (file)
--- a/src/bin/lttng-sessiond/cmd.c
+++ b/src/bin/lttng-sessiond/cmd.c
@@ -766,6 +766,8 @@ int cmd_disable_channel(struct ltt_session *session, int domain,
 
        usess = session->ust_session;
 
+       rcu_read_lock();
+
        switch (domain) {
        case LTTNG_DOMAIN_KERNEL:
        {
@@ -810,6 +812,7 @@ int cmd_disable_channel(struct ltt_session *session, int domain,
        ret = LTTNG_OK;
 
 error:
+       rcu_read_unlock();
        return ret;
 }
 
@@ -830,6 +833,8 @@ int cmd_enable_channel(struct ltt_session *session,
 
        DBG("Enabling channel %s for session %s", attr->name, session->name);
 
+       rcu_read_lock();
+
        switch (domain) {
        case LTTNG_DOMAIN_KERNEL:
        {
@@ -898,6 +903,7 @@ int cmd_enable_channel(struct ltt_session *session,
        }
 
 error:
+       rcu_read_unlock();
        return ret;
 }
 
@@ -910,6 +916,8 @@ int cmd_disable_event(struct ltt_session *session, int domain,
 {
        int ret;
 
+       rcu_read_lock();
+
        switch (domain) {
        case LTTNG_DOMAIN_KERNEL:
        {
@@ -968,6 +976,7 @@ int cmd_disable_event(struct ltt_session *session, int domain,
        ret = LTTNG_OK;
 
 error:
+       rcu_read_unlock();
        return ret;
 }
 
@@ -979,6 +988,8 @@ int cmd_disable_event_all(struct ltt_session *session, int domain,
 {
        int ret;
 
+       rcu_read_lock();
+
        switch (domain) {
        case LTTNG_DOMAIN_KERNEL:
        {
@@ -1037,6 +1048,7 @@ int cmd_disable_event_all(struct ltt_session *session, int domain,
        ret = LTTNG_OK;
 
 error:
+       rcu_read_unlock();
        return ret;
 }
 
@@ -1126,6 +1138,8 @@ int cmd_enable_event(struct ltt_session *session, int domain,
        assert(event);
        assert(channel_name);
 
+       rcu_read_lock();
+
        switch (domain) {
        case LTTNG_DOMAIN_KERNEL:
        {
@@ -1224,6 +1238,7 @@ int cmd_enable_event(struct ltt_session *session, int domain,
        ret = LTTNG_OK;
 
 error:
+       rcu_read_unlock();
        return ret;
 }
 
@@ -1240,6 +1255,8 @@ int cmd_enable_event_all(struct ltt_session *session, int domain,
        assert(session);
        assert(channel_name);
 
+       rcu_read_lock();
+
        switch (domain) {
        case LTTNG_DOMAIN_KERNEL:
        {
@@ -1371,6 +1388,7 @@ int cmd_enable_event_all(struct ltt_session *session, int domain,
        ret = LTTNG_OK;
 
 error:
+       rcu_read_unlock();
        return ret;
 }