1 files changed, 17 insertions, 10 deletions

diff --git a/hw/usb/dev-mtp.c b/hw/usb/dev-mtp.c
index 100b7171f4..68c5eb8eaa 100644
--- a/hw/usb/dev-mtp.c
+++ b/hw/usb/dev-mtp.c
@@ -191,7 +191,7 @@ struct MTPState {
 #ifdef CONFIG_INOTIFY1
     /* inotify descriptor */
     int          inotifyfd;
-    QTAILQ_HEAD(events, MTPMonEntry) events;
+    QTAILQ_HEAD(, MTPMonEntry) events;
 #endif
     /* Responder is expecting a write operation */
     bool write_pending;
@@ -653,13 +653,18 @@ static void usb_mtp_object_readdir(MTPState *s, MTPObject *o)
 {
     struct dirent *entry;
     DIR *dir;
+    int fd;
 
     if (o->have_children) {
         return;
     }
     o->have_children = true;
 
-    dir = opendir(o->path);
+    fd = open(o->path, O_DIRECTORY | O_CLOEXEC | O_NOFOLLOW);
+    if (fd < 0) {
+        return;
+    }
+    dir = fdopendir(fd);
     if (!dir) {
         return;
     }
@@ -1007,7 +1012,7 @@ static MTPData *usb_mtp_get_object(MTPState *s, MTPControl *c,
 
     trace_usb_mtp_op_get_object(s->dev.addr, o->handle, o->path);
 
-    d->fd = open(o->path, O_RDONLY);
+    d->fd = open(o->path, O_RDONLY | O_CLOEXEC | O_NOFOLLOW);
     if (d->fd == -1) {
         usb_mtp_data_free(d);
         return NULL;
@@ -1031,7 +1036,7 @@ static MTPData *usb_mtp_get_partial_object(MTPState *s, MTPControl *c,
                                         c->argv[1], c->argv[2]);
 
     d = usb_mtp_data_alloc(c);
-    d->fd = open(o->path, O_RDONLY);
+    d->fd = open(o->path, O_RDONLY | O_CLOEXEC | O_NOFOLLOW);
     if (d->fd == -1) {
         usb_mtp_data_free(d);
         return NULL;
@@ -1658,7 +1663,7 @@ static void usb_mtp_write_data(MTPState *s)
                                  0, 0, 0, 0);
             goto done;
         }
-        d->fd = open(path, O_CREAT | O_WRONLY, mask);
+        d->fd = open(path, O_CREAT | O_WRONLY | O_CLOEXEC | O_NOFOLLOW, mask);
         if (d->fd == -1) {
             usb_mtp_queue_result(s, RES_STORE_FULL, d->trans,
                                  0, 0, 0, 0);
@@ -1705,7 +1710,7 @@ free:
     s->write_pending = false;
 }
 
-static void usb_mtp_write_metadata(MTPState *s)
+static void usb_mtp_write_metadata(MTPState *s, uint64_t dlen)
 {
     MTPData *d = s->data_out;
     ObjectInfo *dataset = (ObjectInfo *)d->data;
@@ -1717,11 +1722,14 @@ static void usb_mtp_write_metadata(MTPState *s)
     assert(!s->write_pending);
     assert(p != NULL);
 
-    filename = utf16_to_str(dataset->length, dataset->filename);
+    filename = utf16_to_str(MIN(dataset->length,
+                                dlen - offsetof(ObjectInfo, filename)),
+                            dataset->filename);
 
     if (strchr(filename, '/')) {
         usb_mtp_queue_result(s, RES_PARAMETER_NOT_SUPPORTED, d->trans,
                              0, 0, 0, 0);
+        g_free(filename);
         return;
     }
 
@@ -1733,7 +1741,6 @@ static void usb_mtp_write_metadata(MTPState *s)
     s->dataset.filename = filename;
     s->dataset.format = dataset->format;
     s->dataset.size = dataset->size;
-    s->dataset.filename = filename;
     s->write_pending = true;
 
     if (s->dataset.format == FMT_ASSOCIATION) {
@@ -1802,7 +1809,7 @@ static void usb_mtp_get_data(MTPState *s, mtp_container *container,
         if (d->offset == d->length) {
             /* The operation might have already failed */
             if (!s->result) {
-                usb_mtp_write_metadata(s);
+                usb_mtp_write_metadata(s, dlen);
             }
             usb_mtp_data_free(s->data_out);
             s->data_out = NULL;
@@ -1982,7 +1989,7 @@ static void usb_mtp_handle_data(USBDevice *dev, USBPacket *p)
     case EP_EVENT:
 #ifdef CONFIG_INOTIFY1
         if (!QTAILQ_EMPTY(&s->events)) {
-            struct MTPMonEntry *e = QTAILQ_LAST(&s->events, events);
+            struct MTPMonEntry *e = QTAILQ_LAST(&s->events);
             uint32_t handle;
             int len = sizeof(container) + sizeof(uint32_t);