11:12 p.m.
On Wed, Apr 18, 2018 at 01:52:17PM +0200, Katerina Koukiou wrote:
Signed-off-by: Katerina Koukiou <kkoukiou(a)redhat.com>
---
data/org.libvirt.Domain.xml | 7 +++++++
src/domain.c | 41 +++++++++++++++++++++++++++++++++++++++++
2 files changed, 48 insertions(+)
diff --git a/src/domain.c b/src/domain.c
index 5e59094..9a6ff1d 100644
--- a/src/domain.c
+++ b/src/domain.c
@@ -677,6 +677,46 @@ virtDBusDomainDetachDevice(GVariant *inArgs,
virtDBusUtilSetLastVirtError(error);
}
+static void
+virtDBusDomainFSFreeze(GVariant *inArgs,
+ GUnixFDList *inFDs G_GNUC_UNUSED,
+ const gchar *objectPath,
+ gpointer userData,
+ GVariant **outArgs,
+ GUnixFDList **outFDs G_GNUC_UNUSED,
+ GError **error)
+{
+ virtDBusConnect *connect = userData;
+ g_autoptr(virDomain) domain = NULL;
+ g_autofree const gchar **mountpoints = NULL;
+ const gchar **tmp;
+ GVariantIter *iter;
+ gsize nmountpoints = 0;
+ guint flags;
+ gint ret;
+
+ g_variant_get(inArgs, "(asu)", &iter, &flags);
+
+ nmountpoints = g_variant_iter_n_children(iter);
+ if (nmountpoints > 0) {
+ mountpoints = g_new0(const gchar*, nmountpoints);
+ tmp = mountpoints;
+ while (g_variant_iter_loop(iter, "&s", tmp))
g_variant_iter_loop seems to access tmp even if it returns 0.
For an array with two strings, valgrind reports:
==27339== Invalid read of size 8
==27339== at 0x54B2CB3: g_variant_valist_get (in /usr/lib64/libglib-2.0.so.0.5200.3)
==27339== by 0x54B4AAB: g_variant_iter_loop (in /usr/lib64/libglib-2.0.so.0.5200.3)
==27339== by 0x407AD1: virtDBusDomainFSFreeze (domain.c:720)
==27339== by 0x40B723: virtDBusGDBusHandleMethod (gdbus.c:224)
==27339== by 0x40B723: virtDBusGDBusMethodCallThread (gdbus.c:263)
==27339== by 0x54A146F: g_thread_pool_thread_proxy (in
/usr/lib64/libglib-2.0.so.0.5200.3)
==27339== by 0x54A0AA4: g_thread_proxy (in /usr/lib64/libglib-2.0.so.0.5200.3)
==27339== by 0x611E636: start_thread (in /lib64/libpthread-2.25.so)
==27339== by 0x642FBCE: clone (in /lib64/libc-2.25.so)
==27339== Address 0x1064f980 is 0 bytes after a block of size 16 alloc'd
==27339== at 0x4C2CEE6: calloc (vg_replace_malloc.c:711)
==27339== by 0x547EAF0: g_malloc0 (in /usr/lib64/libglib-2.0.so.0.5200.3)
==27339== by 0x407AAA: virtDBusDomainFSFreeze (domain.c:718)
==27339== by 0x40B723: virtDBusGDBusHandleMethod (gdbus.c:224)
==27339== by 0x40B723: virtDBusGDBusMethodCallThread (gdbus.c:263)
==27339== Invalid write of size 8
==27339== at 0x54B2CF0: g_variant_valist_get (in /usr/lib64/libglib-2.0.so.0.5200.3)
==27339== by 0x54B4AAB: g_variant_iter_loop (in /usr/lib64/libglib-2.0.so.0.5200.3)
==27339== by 0x407AD1: virtDBusDomainFSFreeze (domain.c:720)
==27339== by 0x40B723: virtDBusGDBusHandleMethod (gdbus.c:224)
==27339== by 0x40B723: virtDBusGDBusMethodCallThread (gdbus.c:263)
==27339== by 0x54A146F: g_thread_pool_thread_proxy (in
/usr/lib64/libglib-2.0.so.0.5200.3)
==27339== by 0x54A0AA4: g_thread_proxy (in /usr/lib64/libglib-2.0.so.0.5200.3)
==27339== by 0x611E636: start_thread (in /lib64/libpthread-2.25.so)
==27339== by 0x642FBCE: clone (in /lib64/libc-2.25.so)
==27339== Address 0x1064f980 is 0 bytes after a block of size 16 alloc'd
==27339== at 0x4C2CEE6: calloc (vg_replace_malloc.c:711)
==27339== by 0x547EAF0: g_malloc0 (in /usr/lib64/libglib-2.0.so.0.5200.3)
==27339== by 0x407AAA: virtDBusDomainFSFreeze (domain.c:718)
==27339== by 0x40B723: virtDBusGDBusHandleMethod (gdbus.c:224)
==27339== by 0x40B723: virtDBusGDBusMethodCallThread (gdbus.c:263)
So yes, you should allocate nmountpoints + 1:
https://www.redhat.com/archives/libvir-list/2018-April/msg01647.html
+ tmp++;
+ g_variant_iter_free(iter);
This should be moved after the if (n > 0) condition.
g_variant_get initialized the iterator even if the string array has zero
elements.
+ }
+
+ domain = virtDBusDomainGetVirDomain(connect, objectPath, error);
+ if (!domain)
+ return;
+
+ ret = virDomainFSFreeze(domain, mountpoints, nmountpoints, flags);
+ if (ret < 0)
+ return virtDBusUtilSetLastVirtError(error);
+
+ *outArgs = g_variant_new("(u)", ret);
+}
+
static void
virtDBusDomainFSTrim(GVariant *inArgs,
GUnixFDList *inFDs G_GNUC_UNUSED,
Reviewed-by: Ján Tomko <jtomko(a)redhat.com>
Jano