A smattering of fixes for problems that Coverity reported.

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Merge remote-tracking branch 'remotes/bonzini/tags/for-upstream' into staging

A smattering of fixes for problems that Coverity reported.

# gpg: Signature made Mon 17 Nov 2014 17:03:25 GMT using RSA key ID 78C7AE83
# gpg: Good signature from "Paolo Bonzini <bonzini@gnu.org>"
# gpg:                 aka "Paolo Bonzini <pbonzini@redhat.com>"
# gpg: WARNING: This key is not certified with sufficiently trusted signatures!
# gpg:          It is not certain that the signature belongs to the owner.
# Primary key fingerprint: 46F5 9FBD 57D6 12E7 BFD4  E2F7 7E15 100C CD36 69B1
#      Subkey fingerprint: F133 3857 4B66 2389 866C  7682 BFFB D25F 78C7 AE83

* remotes/bonzini/tags/for-upstream:
  hcd-musb: fix dereference null return value
  target-cris/translate.c: fix out of bounds read
  shpc: fix error propaagation
  qemu-char: fix MISSING_COMMA
  acl: fix memory leak
  nvme: remove superfluous check
  loader: fix NEGATIVE_RETURNS
  qga: fix false negative argument passing
  mips_mipssim: fix use-after-free for filename
  l2tpv3: fix fd leak
  l2tpv3: fix possible double free
  libcacard: fix resource leak

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>

hw/block/nvme.c

@@ -583,8 +583,7 @@ static int nvme_start_ctrl(NvmeCtrl *n)
             NVME_CC_IOCQES(n->bar.cc) > NVME_CTRL_CQES_MAX(n->id_ctrl.cqes) ||
             NVME_CC_IOSQES(n->bar.cc) < NVME_CTRL_SQES_MIN(n->id_ctrl.sqes) ||
             NVME_CC_IOSQES(n->bar.cc) > NVME_CTRL_SQES_MAX(n->id_ctrl.sqes) ||
-            !NVME_AQA_ASQS(n->bar.aqa) || NVME_AQA_ASQS(n->bar.aqa) > 4095 ||
+            !NVME_AQA_ASQS(n->bar.aqa) || !NVME_AQA_ACQS(n->bar.aqa)) {
-            !NVME_AQA_ACQS(n->bar.aqa) || NVME_AQA_ACQS(n->bar.aqa) > 4095) {
         return -1;
     }
 

hw/core/loader.c

@@ -80,6 +80,13 @@ int load_image(const char *filename, uint8_t *addr)
     if (fd < 0)
         return -1;
     size = lseek(fd, 0, SEEK_END);
+    if (size == -1) {
+        fprintf(stderr, "file %-20s: get size error: %s\n",
+                filename, strerror(errno));
+        close(fd);
+        return -1;
+    }
+
     lseek(fd, 0, SEEK_SET);
     if (read(fd, addr, size) != size) {
         close(fd);
@@ -748,6 +755,12 @@ int rom_add_file(const char *file, const char *fw_dir,
     }
     rom->addr     = addr;
     rom->romsize  = lseek(fd, 0, SEEK_END);
+    if (rom->romsize == -1) {
+        fprintf(stderr, "rom: file %-20s: get size error: %s\n",
+                rom->name, strerror(errno));
+        goto err;
+    }
+
     rom->datasize = rom->romsize;
     rom->data     = g_malloc0(rom->datasize);
     lseek(fd, 0, SEEK_SET);

hw/mips/mips_mipssim.c

@@ -197,7 +197,7 @@ mips_mipssim_init(MachineState *machine)
         !kernel_filename && !qtest_enabled()) {
         /* Bail out if we have neither a kernel image nor boot vector code. */
         error_report("Could not load MIPS bios '%s', and no "
-                     "-kernel argument was specified", filename);
+                     "-kernel argument was specified", bios_name);
         exit(1);
     } else {
         /* We have a boot vector start address. */

hw/pci/shpc.c

@@ -559,8 +559,9 @@ void shpc_device_hot_unplug_request_cb(HotplugHandler *hotplug_dev,
     uint8_t led;
     int slot;
 
-    shpc_device_hotplug_common(PCI_DEVICE(dev), &slot, shpc, errp);
+    shpc_device_hotplug_common(PCI_DEVICE(dev), &slot, shpc, &local_err);
     if (local_err) {
+        error_propagate(errp, local_err);
         return;
     }
 

hw/usb/hcd-musb.c

@@ -608,6 +608,7 @@ static void musb_packet(MUSBState *s, MUSBEndPoint *ep,
     USBDevice *dev;
     USBEndpoint *uep;
     int idx = epnum && dir;
+    int id;
     int ttype;
 
     /* ep->type[0,1] contains:
@@ -625,8 +626,11 @@ static void musb_packet(MUSBState *s, MUSBEndPoint *ep,
     /* A wild guess on the FADDR semantics... */
     dev = usb_find_device(&s->port, ep->faddr[idx]);
     uep = usb_ep_get(dev, pid, ep->type[idx] & 0xf);
-    usb_packet_setup(&ep->packey[dir].p, pid, uep, 0,
+    id = pid;
-                     (dev->addr << 16) | (uep->nr << 8) | pid, false, true);
+    if (uep) {
+        id |= (dev->addr << 16) | (uep->nr << 8);
+    }
+    usb_packet_setup(&ep->packey[dir].p, pid, uep, 0, id, false, true);
     usb_packet_addbuf(&ep->packey[dir].p, ep->buf[idx], len);
     ep->packey[dir].ep = ep;
     ep->packey[dir].dir = dir;

libcacard/vscclient.c

@@ -597,7 +597,7 @@ connect_to_qemu(
     const char *port
 ) {
     struct addrinfo hints;
-    struct addrinfo *server;
+    struct addrinfo *server = NULL;
     int ret, sock;
 
     sock = socket(AF_INET, SOCK_STREAM, 0);
@@ -629,9 +629,14 @@ connect_to_qemu(
     if (verbose) {
         printf("Connected (sizeof Header=%zd)!\n", sizeof(VSCMsgHeader));
     }
+
+    freeaddrinfo(server);
     return sock;
 
 cleanup_socket:
+    if (server) {
+        freeaddrinfo(server);
+    }
     closesocket(sock);
     return -1;
 }

net/l2tpv3.c

@@ -516,7 +516,7 @@ static void net_l2tpv3_cleanup(NetClientState *nc)
     qemu_purge_queued_packets(nc);
     l2tpv3_read_poll(s, false);
     l2tpv3_write_poll(s, false);
-    if (s->fd > 0) {
+    if (s->fd >= 0) {
         close(s->fd);
     }
     destroy_vector(s->msgvec, MAX_L2TPV3_MSGCNT, IOVSIZE);
@@ -660,7 +660,6 @@ int net_init_l2tpv3(const NetClientOptions *opts,
     if (fd == -1) {
         fd = -errno;
         error_report("l2tpv3_open : socket creation failed, errno = %d", -fd);
-        freeaddrinfo(result);
         goto outerr;
     }
     if (bind(fd, (struct sockaddr *) result->ai_addr, result->ai_addrlen)) {
@@ -746,7 +745,7 @@ int net_init_l2tpv3(const NetClientOptions *opts,
     return 0;
 outerr:
     qemu_del_net_client(nc);
-    if (fd > 0) {
+    if (fd >= 0) {
         close(fd);
     }
     if (result) {

qemu-char.c

@@ -464,7 +464,7 @@ static const char * const mux_help[] = {
     "% h    print this help\n\r",
     "% x    exit emulator\n\r",
     "% s    save disk data back to file (if -snapshot)\n\r",
-    "% t    toggle console timestamps\n\r"
+    "% t    toggle console timestamps\n\r",
     "% b    send break (magic sysrq)\n\r",
     "% c    switch between console and monitor\n\r",
     "% %  sends %\n\r",

qga/main.c

@@ -603,8 +603,8 @@ static void process_event(JSONMessageParser *parser, QList *tokens)
             error_free(err);
         }
         ret = send_response(s, QOBJECT(qdict));
-        if (ret) {
+        if (ret < 0) {
-            g_warning("error sending error response: %s", strerror(ret));
+            g_warning("error sending error response: %s", strerror(-ret));
         }
     }
 

target-cris/translate.c

@@ -169,9 +169,7 @@ static int preg_sizes[] = {
 
 static inline void t_gen_mov_TN_preg(TCGv tn, int r)
 {
-    if (r < 0 || r > 15) {
+    assert(r >= 0 && r <= 15);
-        fprintf(stderr, "wrong register read $p%d\n", r);
-    }
     if (r == PR_BZ || r == PR_WZ || r == PR_DZ) {
         tcg_gen_mov_tl(tn, tcg_const_tl(0));
     } else if (r == PR_VR) {
@@ -182,9 +180,7 @@ static inline void t_gen_mov_TN_preg(TCGv tn, int r)
 }
 static inline void t_gen_mov_preg_TN(DisasContext *dc, int r, TCGv tn)
 {
-    if (r < 0 || r > 15) {
+    assert(r >= 0 && r <= 15);
-        fprintf(stderr, "wrong register write $p%d\n", r);
-    }
     if (r == PR_BZ || r == PR_WZ || r == PR_DZ) {
         return;
     } else if (r == PR_SRS) {

util/acl.c

@@ -132,7 +132,6 @@ int qemu_acl_insert(qemu_acl *acl,
                     const char *match,
                     int index)
 {
-    qemu_acl_entry *entry;
     qemu_acl_entry *tmp;
     int i = 0;
 
@@ -142,13 +141,14 @@ int qemu_acl_insert(qemu_acl *acl,
         return qemu_acl_append(acl, deny, match);
     }
 
+    QTAILQ_FOREACH(tmp, &acl->entries, next) {
+        i++;
+        if (i == index) {
+            qemu_acl_entry *entry;
             entry = g_malloc(sizeof(*entry));
             entry->match = g_strdup(match);
             entry->deny = deny;
 
-    QTAILQ_FOREACH(tmp, &acl->entries, next) {
-        i++;
-        if (i == index) {
             QTAILQ_INSERT_BEFORE(tmp, entry, next);
             acl->nentries++;
             break;