shaba/libvirt
1
0
Fork 0
mirror of https://gitlab.com/libvirt/libvirt.git synced 2025-01-25 10:03:49 +03:00
Code Releases Activity

rpc: fix keep alive timer segfault

Browse Source 
ka maybe have been freeed in virObjectUnref, application using
virKeepAliveTimer will segfault when unlock ka. We should keep
ka's refs positive before using it.

#0  0x00007fd8f79970e8 in virClassIsDerivedFrom (klass=0xdeadbeef, parent=0x7fd8e8001b80) at util/virobject.c:169
#1  0x00007fd8f799742e in virObjectIsClass (anyobj=anyobj entry=0x7fd8e800b9c0, klass=＜optimized out＞) at util/virobject.c:365
#2  0x00007fd8f79974e4 in virObjectUnlock (anyobj=0x7fd8e800b9c0) at util/virobject.c:338
#3  0x00007fd8f7ac477e in virKeepAliveTimer (timer=＜optimized out＞, opaque=0x7fd8e800b9c0) at rpc/virkeepalive.c:177
#4  0x00007fd8f7e5c9cf in libvirt_virEventInvokeTimeoutCallback () from /usr/lib64/python2.7/site-packages/libvirtmod.so
#5  0x00007fd8ff64db94 in PyEval_EvalFrameEx () from /lib64/libpython2.7.so.1.0
#6  0x00007fd8ff64f1ad in PyEval_EvalCodeEx () from /lib64/libpython2.7.so.1.0
#7  0x00007fd8ff64d85f in PyEval_EvalFrameEx () from /lib64/libpython2.7.so.1.0
#8  0x00007fd8ff64d950 in PyEval_EvalFrameEx () from /lib64/libpython2.7.so.1.0
#9  0x00007fd8ff64d950 in PyEval_EvalFrameEx () from /lib64/libpython2.7.so.1.0
#10 0x00007fd8ff64f1ad in PyEval_EvalCodeEx () from /lib64/libpython2.7.so.1.0
#11 0x00007fd8ff5dc098 in function_call () from /lib64/libpython2.7.so.1.0
#12 0x00007fd8ff5b7073 in PyObject_Call () from /lib64/libpython2.7.so.1.0
#13 0x00007fd8ff5c6085 in instancemethod_call () from /lib64/libpython2.7.so.1.0
#14 0x00007fd8ff5b7073 in PyObject_Call () from /lib64/libpython2.7.so.1.0
#15 0x00007fd8ff648ff7 in PyEval_CallObjectWithKeywords () from /lib64/libpython2.7.so.1.0
#16 0x00007fd8ff67d7e2 in t_bootstrap () from /lib64/libpython2.7.so.1.0
#17 0x00007fd8ff358df3 in start_thread () from /lib64/libpthread.so.0
#18 0x00007fd8fe97d3ed in clone () from /lib64/libc.so.6

Signed-off-by: Yi Wang <wang.yi59@zte.com.cn>
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
This commit is contained in:
Yi Wang 2017-04-18 09:55:29 +08:00 committed by Michal Privoznik
parent b2763f189c
commit ab5bb6f346
1 changed files with 4 additions and 7 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

11
src/rpc/virkeepalive.c
View File

@ -160,17 +160,17 @@ virKeepAliveTimer(int timer ATTRIBUTE_UNUSED, void *opaque)
bool dead;
void *client;
virObjectRef(ka);
virObjectLock(ka);
client = ka->client;
dead = virKeepAliveTimerInternal(ka, &msg);
virObjectUnlock(ka);
if (!dead && !msg)
goto cleanup;
virObjectRef(ka);
virObjectUnlock(ka);
if (dead) {
ka->deadCB(client);
} else if (ka->sendCB(client, msg) < 0) {
@ -178,11 +178,8 @@ virKeepAliveTimer(int timer ATTRIBUTE_UNUSED, void *opaque)
virNetMessageFree(msg);
}
virObjectLock(ka);
virObjectUnref(ka);
cleanup:
virObjectUnlock(ka);
virObjectUnref(ka);
}