DM: fix memory leak

1. free memory allocated by strdup in blockif_open
2. free msix.table when its pci device deinit

Tracked-On: #2704
Signed-off-by: Minggui Cao <minggui.cao@intel.com>
Acked-by: Yin Fengwei <fengwei.yin@intel.com>

devicemodel/hw/block_if.c

@@ -759,8 +759,18 @@ blockif_open(const char *optstr, const char *ident)
 		pthread_setname_np(bc->btid[i], tname);
 	}
 
+	/* free strdup memory */
+	if (nopt) {
+		free(nopt);
+		nopt = NULL;
+	}
+
 	return bc;
 err:
+	/* handle failure case: free strdup memory*/
+	if (nopt)
+		free(nopt);
+
 	if (fd >= 0)
 		close(fd);
 	return NULL;

devicemodel/hw/pci/core.c

@@ -104,6 +104,7 @@ static void pci_lintr_route(struct pci_vdev *dev);
 static void pci_lintr_update(struct pci_vdev *dev);
 static void pci_cfgrw(struct vmctx *ctx, int vcpu, int in, int bus, int slot,
 		      int func, int coff, int bytes, uint32_t *val);
+static void pci_emul_free_msixcap(struct pci_vdev *pdi);
 
 static inline void
 CFGWRITE(struct pci_vdev *dev, int coff, uint32_t val, int bytes)
@@ -924,6 +925,7 @@ pci_emul_deinit(struct vmctx *ctx, struct pci_vdev_ops *ops, int bus, int slot,
 	if (fi->fi_devi) {
 		pci_lintr_release(fi->fi_devi);
 		pci_emul_free_bars(fi->fi_devi);
+		pci_emul_free_msixcap(fi->fi_devi);
 		free(fi->fi_devi);
 	}
 }
@@ -1030,6 +1032,16 @@ pci_emul_add_msixcap(struct pci_vdev *dev, int msgnum, int barnum)
 					sizeof(msixcap)));
 }
 
+static void
+pci_emul_free_msixcap(struct pci_vdev *pdi)
+{
+	if (pdi->msix.table) {
+		free(pdi->msix.table);
+		pdi->msix.table = NULL;
+	}
+}
+
+
 void
 msixcap_cfgwrite(struct pci_vdev *dev, int capoff, int offset,
 		 int bytes, uint32_t val)