[PATCH] virtlogd: solve some memory leaks

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

 



We used asan to find some memory leaks in virtlogd. In the virThreadPoolFree function,
When job->data is of type virNetServerJobPtr, the following memory leak problem exists.

1. job->data is not released
Direct leak of 24 byte(s) in 1 object(s) allocated from:
  #0 0x7f14ab932560 in calloc (/usr/local/gcc-6-4/lib64/libasan.so.3+0xc7560)  ??:?
  #1 0x55ab07088853 in virAlloc (/usr/sbin/virtlogd+0x31853)  /usr/src/debug/libvirt-3.2.0-529.x86_64/src/util/viralloc.c:144
  #2 0x55ab0707a515 (/usr/sbin/virtlogd+0x23515)  /usr/src/debug/libvirt-3.2.0-529.x86_64/src/rpc/virnetserver.c:209
  #3 0x55ab07076d87 (/usr/sbin/virtlogd+0x1fd87)  /usr/src/debug/libvirt-3.2.0-529.x86_64/src/rpc/virnetserverclient.c:1374
  #4 0x55ab070770e2 (/usr/sbin/virtlogd+0x200e2)  /usr/src/debug/libvirt-3.2.0-529.x86_64/src/rpc/virnetserverclient.c:1563
  #5 0x55ab0709c67f in virEventPollRunOnce (/usr/sbin/virtlogd+0x4567f)  /usr/src/debug/libvirt-3.2.0-529.x86_64/src/util/vireventpoll.c:508
  #6 0x55ab0709ad30 in virEventRunDefaultImpl (/usr/sbin/virtlogd+0x43d30)  /usr/src/debug/libvirt-3.2.0-529.x86_64/src/util/virevent.c:314
  #7 0x55ab07079f6c in virNetDaemonRun (/usr/sbin/virtlogd+0x22f6c)  /usr/src/debug/libvirt-3.2.0-529.x86_64/src/rpc/virnetdaemon.c:847
  #8 0x55ab070714db in main (/usr/sbin/virtlogd+0x1a4db)  /usr/src/debug/libvirt-3.2.0-529.x86_64/src/logging/log_daemon.c:1162
  #9 0x7f14aa3c2c56 in __libc_start_main (/usr/lib64/libc.so.6+0x25c56)  ??:?
  #10 0x55ab07072639 in _start (/usr/sbin/virtlogd+0x1b639)  ??:?

2. job->data->msg->buffer was not released
Indirect leak of 152 byte(s) in 1 object(s) allocated from:
  #0 0x7f14ab932750 in realloc (/usr/local/gcc-6-4/lib64/libasan.so.3+0xc7750)  ??:?
  #1 0x55ab0708894d in virReallocN (/usr/sbin/virtlogd+0x3194d)  /usr/src/debug/libvirt-3.2.0-529.x86_64/src/util/viralloc.c:245
  #2 0x55ab0707d830 in virNetMessageDecodeLength (/usr/sbin/virtlogd+0x26830)  /usr/src/debug/libvirt-3.2.0-529.x86_64/src/rpc/virnetmessage.c:157
  #3 0x55ab07076b36 (/usr/sbin/virtlogd+0x1fb36)  /usr/src/debug/libvirt-3.2.0-529.x86_64/src/rpc/virnetserverclient.c:1269
  #4 0x55ab070770e2 (/usr/sbin/virtlogd+0x200e2)  /usr/src/debug/libvirt-3.2.0-529.x86_64/src/rpc/virnetserverclient.c:1563
  #5 0x55ab0709c67f in virEventPollRunOnce (/usr/sbin/virtlogd+0x4567f)  /usr/src/debug/libvirt-3.2.0-529.x86_64/src/util/vireventpoll.c:508
  #6 0x55ab0709ad30 in virEventRunDefaultImpl (/usr/sbin/virtlogd+0x43d30)  /usr/src/debug/libvirt-3.2.0-529.x86_64/src/util/virevent.c:314
  #7 0x55ab07079f6c in virNetDaemonRun (/usr/sbin/virtlogd+0x22f6c)  /usr/src/debug/libvirt-3.2.0-529.x86_64/src/rpc/virnetdaemon.c:847
  #8 0x55ab070714db in main (/usr/sbin/virtlogd+0x1a4db)  /usr/src/debug/libvirt-3.2.0-529.x86_64/src/logging/log_daemon.c:1162
  #9 0x7f14aa3c2c56 in __libc_start_main (/usr/lib64/libc.so.6+0x25c56)  ??:?
  #10 0x55ab07072639 in _start (/usr/sbin/virtlogd+0x1b639)  ??:?

3. job->data->msg was not released
Indirect leak of 104 byte(s) in 1 object(s) allocated from:
  #0 0x7f14ab932560 in calloc (/usr/local/gcc-6-4/lib64/libasan.so.3+0xc7560)  ??:?
  #1 0x55ab07088853 in virAlloc (/usr/sbin/virtlogd+0x31853)  /usr/src/debug/libvirt-3.2.0-529.x86_64/src/util/viralloc.c:144
  #2 0x55ab0707d541 in virNetMessageNew (/usr/sbin/virtlogd+0x26541)  /usr/src/debug/libvirt-3.2.0-529.x86_64/src/rpc/virnetmessage.c:42
  #3 0x55ab07076618 (/usr/sbin/virtlogd+0x1f618)  /usr/src/debug/libvirt-3.2.0-529.x86_64/src/rpc/virnetserverclient.c:416
  #4 0x55ab0707755c in virNetServerClientNew (/usr/sbin/virtlogd+0x2055c)  /usr/src/debug/libvirt-3.2.0-529.x86_64/src/rpc/virnetserverclient.c:467
  #5 0x55ab0707a9df (/usr/sbin/virtlogd+0x239df)  /usr/src/debug/libvirt-3.2.0-529.x86_64/src/rpc/virnetserver.c:319
  #6 0x55ab07075ad9 (/usr/sbin/virtlogd+0x1ead9)  /usr/src/debug/libvirt-3.2.0-529.x86_64/src/rpc/virnetserverservice.c:88
  #7 0x55ab0709c67f in virEventPollRunOnce (/usr/sbin/virtlogd+0x4567f)  /usr/src/debug/libvirt-3.2.0-529.x86_64/src/util/vireventpoll.c:508
  #8 0x55ab0709ad30 in virEventRunDefaultImpl (/usr/sbin/virtlogd+0x43d30)  /usr/src/debug/libvirt-3.2.0-529.x86_64/src/util/virevent.c:314
  #9 0x55ab07079f6c in virNetDaemonRun (/usr/sbin/virtlogd+0x22f6c)  /usr/src/debug/libvirt-3.2.0-529.x86_64/src/rpc/virnetdaemon.c:847
  #10 0x55ab070714db in main (/usr/sbin/virtlogd+0x1a4db)  /usr/src/debug/libvirt-3.2.0-529.x86_64/src/logging/log_daemon.c:1162
  #11 0x7f14aa3c2c56 in __libc_start_main (/usr/lib64/libc.so.6+0x25c56)  ??:?
  #12 0x55ab07072639 in _start (/usr/sbin/virtlogd+0x1b639)  ??:?

4. job->data->prog was not released
Indirect leak of 64 byte(s) in 1 object(s) allocated from:
  #0 0x7f14ab932560 in calloc (/usr/local/gcc-6-4/lib64/libasan.so.3+0xc7560)  ??:?
  #1 0x55ab07088d34 in virAllocVar (/usr/sbin/virtlogd+0x31d34)  /usr/src/debug/libvirt-3.2.0-529.x86_64/src/util/viralloc.c:560
  #2 0x55ab070ac45c in virObjectNew (/usr/sbin/virtlogd+0x5545c)  /usr/src/debug/libvirt-3.2.0-529.x86_64/src/util/virobject.c:200
  #3 0x55ab07074f06 in virNetServerProgramNew (/usr/sbin/virtlogd+0x1df06)  /usr/src/debug/libvirt-3.2.0-529.x86_64/src/rpc/virnetserverprogram.c:80
  #4 0x55ab07071432 in main (/usr/sbin/virtlogd+0x1a432)  /usr/src/debug/libvirt-3.2.0-529.x86_64/src/logging/log_daemon.c:1131
  #5 0x7f14aa3c2c56 in __libc_start_main (/usr/lib64/libc.so.6+0x25c56)  ??:?
  #6 0x55ab07072639 in _start (/usr/sbin/virtlogd+0x1b639)  ??:?

Signed-off-by: Jian wang <wangjian161@xxxxxxxxxx>
---
 src/libvirt_private.syms |  1 +
 src/rpc/virnetserver.c   | 12 ++++++++++++
 src/util/virthreadpool.c |  9 +++++++++
 src/util/virthreadpool.h |  2 ++
 4 files changed, 24 insertions(+)

diff --git a/src/libvirt_private.syms b/src/libvirt_private.syms
index a6af44f..b23fc33 100644
--- a/src/libvirt_private.syms
+++ b/src/libvirt_private.syms
@@ -3316,6 +3316,7 @@ virThreadPoolGetMaxWorkers;
 virThreadPoolGetMinWorkers;
 virThreadPoolGetPriorityWorkers;
 virThreadPoolNewFull;
+virThreadPoolSetFreeFunc;
 virThreadPoolSendJob;
 virThreadPoolSetParameters;

diff --git a/src/rpc/virnetserver.c b/src/rpc/virnetserver.c
index e0a2386..66f0fb6 100644
--- a/src/rpc/virnetserver.c
+++ b/src/rpc/virnetserver.c
@@ -188,6 +188,15 @@ virNetServerGetProgramLocked(virNetServerPtr srv,
     return NULL;
 }

+static void virNetServerHandleFree(void *jobOpaque)
+{
+    virNetServerJobPtr job = jobOpaque;
+
+    virObjectUnref(job->prog);
+    virNetMessageFree(job->msg);
+    VIR_FREE(job);
+}
+
 static void
 virNetServerDispatchNewMessage(virNetServerClientPtr client,
                                virNetMessagePtr msg,
@@ -376,6 +385,9 @@ virNetServerPtr virNetServerNew(const char *name,
                                               srv)))
         goto error;

+    if (srv->workers)
+        virThreadPoolSetFreeFunc(srv->workers, virNetServerHandleFree);
+
     srv->name = g_strdup(name);

     srv->next_client_id = next_client_id;
diff --git a/src/util/virthreadpool.c b/src/util/virthreadpool.c
index 379d236..f885c04 100644
--- a/src/util/virthreadpool.c
+++ b/src/util/virthreadpool.c
@@ -54,6 +54,7 @@ struct _virThreadPool {
     bool quit;

     virThreadPoolJobFunc jobFunc;
+    virThreadPoolFreeFunc freeFunc;
     const char *jobName;
     void *jobOpaque;
     virThreadPoolJobList jobList;
@@ -271,6 +272,12 @@ virThreadPoolNewFull(size_t minWorkers,

 }

+void virThreadPoolSetFreeFunc(virThreadPoolPtr pool,
+                              virThreadPoolFreeFunc func)
+{
+    pool->freeFunc = func;
+}
+
 void virThreadPoolFree(virThreadPoolPtr pool)
 {
     virThreadPoolJobPtr job;
@@ -293,6 +300,8 @@ void virThreadPoolFree(virThreadPoolPtr pool)

     while ((job = pool->jobList.head)) {
         pool->jobList.head = pool->jobList.head->next;
+        if (pool->freeFunc)
+            pool->freeFunc(job->data);
         VIR_FREE(job);
     }

diff --git a/src/util/virthreadpool.h b/src/util/virthreadpool.h
index c97d9b3..d2e24f7 100644
--- a/src/util/virthreadpool.h
+++ b/src/util/virthreadpool.h
@@ -27,6 +27,7 @@ typedef struct _virThreadPool virThreadPool;
 typedef virThreadPool *virThreadPoolPtr;

 typedef void (*virThreadPoolJobFunc)(void *jobdata, void *opaque);
+typedef void (*virThreadPoolFreeFunc)(void *jobdata);

 #define virThreadPoolNew(min, max, prio, func, opaque) \
     virThreadPoolNewFull(min, max, prio, func, #func, opaque)
@@ -46,6 +47,7 @@ size_t virThreadPoolGetFreeWorkers(virThreadPoolPtr pool);
 size_t virThreadPoolGetJobQueueDepth(virThreadPoolPtr pool);

 void virThreadPoolFree(virThreadPoolPtr pool);
+void virThreadPoolSetFreeFunc(virThreadPoolPtr pool, virThreadPoolFreeFunc func);

 int virThreadPoolSendJob(virThreadPoolPtr pool,
                          unsigned int priority,
-- 
2.23.0




[Index of Archives]     [Virt Tools]     [Libvirt Users]     [Lib OS Info]     [Fedora Users]     [Fedora Desktop]     [Fedora SELinux]     [Big List of Linux Books]     [Yosemite News]     [KDE Users]     [Fedora Tools]

  Powered by Linux