File 84e4046c-fix-leak-qemuBuildSevCommandLine.patch of Package libvirt.16766

commit 84e4046cd7a0cfa9a70f38919a87400de5519363
Author: Michal Privoznik <mprivozn@redhat.com>
Date:   Wed Jun 13 12:33:57 2018 +0200

    qemuBuildSevCommandLine: fix buffer leak
    
    The buffer is not freed anywhere. Nor in the error paths. Also
    the usage virCommand with respect to buffer is very odd.
    
    ==2504== 1,100 bytes in 1 blocks are definitely lost in loss record 167 of 175
    ==2504==    at 0x4C2CE3F: malloc (vg_replace_malloc.c:298)
    ==2504==    by 0x4C2F1BF: realloc (vg_replace_malloc.c:785)
    ==2504==    by 0x5D32EE2: virReallocN (viralloc.c:245)
    ==2504==    by 0x5D37278: virBufferGrow (virbuffer.c:150)
    ==2504==    by 0x5D3783E: virBufferVasprintf (virbuffer.c:408)
    ==2504==    by 0x5D377A9: virBufferAsprintf (virbuffer.c:381)
    ==2504==    by 0x57017C1: qemuBuildSevCommandLine (qemu_command.c:9707)
    ==2504==    by 0x57030F7: qemuBuildCommandLine (qemu_command.c:10324)
    ==2504==    by 0x575FA48: qemuProcessCreatePretendCmd (qemu_process.c:6644)
    ==2504==    by 0x11351A: testCompareXMLToArgv (qemuxml2argvtest.c:564)
    ==2504==    by 0x1392F7: virTestRun (testutils.c:180)
    ==2504==    by 0x137895: mymain (qemuxml2argvtest.c:2900)
    
    Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
    Reviewed-by: Ján Tomko <jtomko@redhat.com>

Index: libvirt-4.0.0/src/qemu/qemu_command.c
===================================================================
--- libvirt-4.0.0.orig/src/qemu/qemu_command.c
+++ libvirt-4.0.0/src/qemu/qemu_command.c
@@ -9945,6 +9945,7 @@ qemuBuildSEVCommandLine(virDomainObjPtr
     virBuffer buf = VIR_BUFFER_INITIALIZER;
     qemuDomainObjPrivatePtr priv = vm->privateData;
     char *path = NULL;
+    int ret = -1;
 
     if (!sev)
         return 0;
@@ -9958,20 +9959,24 @@ qemuBuildSEVCommandLine(virDomainObjPtr
 
     if (sev->dh_cert) {
         if (virAsprintf(&path, "%s/dh_cert.base64", priv->libDir) < 0)
-            return -1;
+            goto cleanup;
         virBufferAsprintf(&buf, ",dh-cert-file=%s", path);
         VIR_FREE(path);
     }
 
     if (sev->session) {
         if (virAsprintf(&path, "%s/session.base64", priv->libDir) < 0)
-            return -1;
+            goto cleanup;
         virBufferAsprintf(&buf, ",session-file=%s", path);
         VIR_FREE(path);
     }
 
-    virCommandAddArgList(cmd, "-object", virBufferContentAndReset(&buf), NULL);
-    return 0;
+    virCommandAddArg(cmd, "-object");
+    virCommandAddArgBuffer(cmd, &buf);
+    ret = 0;
+ cleanup:
+    virBufferFreeAndReset(&buf);
+    return ret;
 }
 
 static int