[dpdk-stable] [dpdk-dev] [PATCH] eal: fix memory leak in uevent parse and process

[wangyunjian]

From: Yunjian Wang <wangyunjian at huawei.com>

When the memory for uevent.devname is allocated in dev_uev_parse(). It
is not freed when parse the subsystem layer fails in dev_uev_parse().
And Before return, it is also not freed in dev_uev_handler(). These
cause a memory leak.

Fixes: 0d0f478d0483 ("eal/linux: add uevent parse and process")
Cc: stable at dpdk.org

Signed-off-by: Yunjian Wang <wangyunjian at huawei.com>
---
 lib/librte_eal/linux/eal_dev.c | 10 ++++++++--
 1 file changed, 8 insertions(+), 2 deletions(-)

diff --git a/lib/librte_eal/linux/eal_dev.c b/lib/librte_eal/linux/eal_dev.c
index 83c9cd660..3a2bf8514 100644
--- a/lib/librte_eal/linux/eal_dev.c
+++ b/lib/librte_eal/linux/eal_dev.c
@@ -189,7 +189,7 @@ dev_uev_parse(const char *buf, struct rte_dev_event *event, int length)
 	else if (!strncmp(subsystem, "vfio", 4))
 		event->subsystem = EAL_DEV_EVENT_SUBSYSTEM_VFIO;
 	else
-		return -1;
+		goto out;
 
 	/* parse the action type */
 	if (!strncmp(action, "add", 3))
@@ -197,8 +197,12 @@ dev_uev_parse(const char *buf, struct rte_dev_event *event, int length)
 	else if (!strncmp(action, "remove", 6))
 		event->type = RTE_DEV_EVENT_REMOVE;
 	else
-		return -1;
+		goto out;
 	return 0;
+out:
+	if (event->devname)
+		free(event->devname);
+	return -1;
 }
 
 static void
@@ -277,12 +281,14 @@ dev_uev_handler(__rte_unused void *param)
 			rte_spinlock_unlock(&failure_handle_lock);
 		}
 		rte_dev_event_callback_process(uevent.devname, uevent.type);
+		free(uevent.devname);
 	}
 
 	return;
 
 failure_handle_err:
 	rte_spinlock_unlock(&failure_handle_lock);
+	free(uevent.devname);
 }
 
 int
-- 
2.23.0