Merge remote-tracking branch 'remotes/kraxel/tags/fixes-20200325-pull-request' into staging

fixes: input error handling & audio segfault

# gpg: Signature made Wed 25 Mar 2020 10:58:26 GMT
# gpg:                using RSA key 4CB6D8EED3E87138
# gpg: Good signature from "Gerd Hoffmann (work) <kraxel@redhat.com>" [full]
# gpg:                 aka "Gerd Hoffmann <gerd@kraxel.org>" [full]
# gpg:                 aka "Gerd Hoffmann (private) <kraxel@gmail.com>" [full]
# Primary key fingerprint: A032 8CFF B93A 17A7 9901  FE7D 4CB6 D8EE D3E8 7138

* remotes/kraxel/tags/fixes-20200325-pull-request:
  hw/audio/fmopl: fix segmentation fault
  ui/input-linux: Do not ignore ioctl() return value
Signed-off-by: NPeter Maydell <peter.maydell@linaro.org>

hw/audio/fmopl.c

@@ -627,6 +627,7 @@ static int OPLOpenTable( void )
 		free(AMS_TABLE);
 		return 0;
 	}
+    ENV_CURVE = g_new(int32_t, 2 * EG_ENT + 1);
 	/* make total level table */
 	for (t = 0;t < EG_ENT-1 ;t++){
 		rate = ((1<<TL_BITS)-1)/pow(10,EG_STEP*t/20);	/* dB -> voltage */
@@ -694,6 +695,7 @@ static int OPLOpenTable( void )
 
 static void OPLCloseTable( void )
 {
+    g_free(ENV_CURVE);
 	free(TL_TABLE);
 	free(SIN_TABLE);
 	free(AMS_TABLE);
@@ -1090,7 +1092,6 @@ FM_OPL *OPLCreate(int clock, int rate)
 	OPL->clock = clock;
 	OPL->rate  = rate;
 	OPL->max_ch = max_ch;
-    ENV_CURVE = g_new(int32_t, 2 * EG_ENT + 1);
 	/* init grobal tables */
 	OPL_initialize(OPL);
 	/* reset chip */
@@ -1128,7 +1129,6 @@ void OPLDestroy(FM_OPL *OPL)
 #endif
 	OPL_UnLockTable();
 	free(OPL);
-    g_free(ENV_CURVE);
 }
 
 /* ----------  Option handlers ----------       */

ui/input-linux.c

@@ -334,13 +334,15 @@ static void input_linux_complete(UserCreatable *uc, Error **errp)
 
     rc = ioctl(il->fd, EVIOCGBIT(0, sizeof(evtmap)), &evtmap);
     if (rc < 0) {
-        error_setg(errp, "%s: failed to read event bits", il->evdev);
-        goto err_close;
+        goto err_read_event_bits;
     }
 
     if (evtmap & (1 << EV_REL)) {
         relmap = 0;
         rc = ioctl(il->fd, EVIOCGBIT(EV_REL, sizeof(relmap)), &relmap);
+        if (rc < 0) {
+            goto err_read_event_bits;
+        }
         if (relmap & (1 << REL_X)) {
             il->has_rel_x = true;
         }
@@ -349,12 +351,25 @@ static void input_linux_complete(UserCreatable *uc, Error **errp)
     if (evtmap & (1 << EV_ABS)) {
         absmap = 0;
         rc = ioctl(il->fd, EVIOCGBIT(EV_ABS, sizeof(absmap)), &absmap);
+        if (rc < 0) {
+            goto err_read_event_bits;
+        }
         if (absmap & (1 << ABS_X)) {
             il->has_abs_x = true;
             rc = ioctl(il->fd, EVIOCGABS(ABS_X), &absinfo);
+            if (rc < 0) {
+                error_setg(errp, "%s: failed to get get absolute X value",
+                           il->evdev);
+                goto err_close;
+            }
             il->abs_x_min = absinfo.minimum;
             il->abs_x_max = absinfo.maximum;
             rc = ioctl(il->fd, EVIOCGABS(ABS_Y), &absinfo);
+            if (rc < 0) {
+                error_setg(errp, "%s: failed to get get absolute Y value",
+                           il->evdev);
+                goto err_close;
+            }
             il->abs_y_min = absinfo.minimum;
             il->abs_y_max = absinfo.maximum;
         }
@@ -363,7 +378,14 @@ static void input_linux_complete(UserCreatable *uc, Error **errp)
     if (evtmap & (1 << EV_KEY)) {
         memset(keymap, 0, sizeof(keymap));
         rc = ioctl(il->fd, EVIOCGBIT(EV_KEY, sizeof(keymap)), keymap);
+        if (rc < 0) {
+            goto err_read_event_bits;
+        }
         rc = ioctl(il->fd, EVIOCGKEY(sizeof(keystate)), keystate);
+        if (rc < 0) {
+            error_setg(errp, "%s: failed to get global key state", il->evdev);
+            goto err_close;
+        }
         for (i = 0; i < KEY_CNT; i++) {
             if (keymap[i / 8] & (1 << (i % 8))) {
                 if (linux_is_button(i)) {
@@ -390,6 +412,9 @@ static void input_linux_complete(UserCreatable *uc, Error **errp)
     il->initialized = true;
     return;
 
+err_read_event_bits:
+    error_setg(errp, "%s: failed to read event bits", il->evdev);
+
 err_close:
     close(il->fd);
     return;