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diff --git a/unix/x0vncserver/Image.cxx b/unix/x0vncserver/Image.cxx
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index f998c6a..fb9dbd4 100644
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--- a/unix/x0vncserver/Image.cxx
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+++ b/unix/x0vncserver/Image.cxx
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@@ -80,6 +80,14 @@ void Image::Init(int width, int height)
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xim = XCreateImage(dpy, vis, DefaultDepth(dpy, DefaultScreen(dpy)),
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ZPixmap, 0, 0, width, height, BitmapPad(dpy), 0);
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+ if (xim->bytes_per_line <= 0 ||
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+ xim->height <= 0 ||
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+ xim->height >= INT_MAX / xim->bytes_per_line) {
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+ vlog.error("Invalid display size");
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+ XDestroyImage(xim);
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+ exit(1);
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+ }
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+
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xim->data = (char *)malloc(xim->bytes_per_line * xim->height);
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if (xim->data == NULL) {
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vlog.error("malloc() failed");
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@@ -256,6 +264,17 @@ void ShmImage::Init(int width, int height, const XVisualInfo *vinfo)
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return;
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}
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+ if (xim->bytes_per_line <= 0 ||
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+ xim->height <= 0 ||
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+ xim->height >= INT_MAX / xim->bytes_per_line) {
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+ vlog.error("Invalid display size");
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+ XDestroyImage(xim);
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+ xim = NULL;
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+ delete shminfo;
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+ shminfo = NULL;
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+ return;
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+ }
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+
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shminfo->shmid = shmget(IPC_PRIVATE,
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xim->bytes_per_line * xim->height,
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IPC_CREAT|0777);
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diff --git a/vncviewer/PlatformPixelBuffer.cxx b/vncviewer/PlatformPixelBuffer.cxx
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index a2b506d..9266d9f 100644
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--- a/vncviewer/PlatformPixelBuffer.cxx
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+++ b/vncviewer/PlatformPixelBuffer.cxx
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@@ -49,6 +49,15 @@ PlatformPixelBuffer::PlatformPixelBuffer(int width, int height) :
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if (!xim)
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throw rdr::Exception("XCreateImage");
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+ if (xim->bytes_per_line <= 0 ||
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+ xim->height <= 0 ||
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+ xim->height >= INT_MAX / xim->bytes_per_line) {
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+ if (xim)
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+ XDestroyImage(xim);
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+ xim = NULL;
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+ throw rdr::Exception("Invalid display size");
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+ }
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+
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xim->data = (char*)malloc(xim->bytes_per_line * xim->height);
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if (!xim->data)
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throw rdr::Exception("malloc");
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@@ -152,6 +161,16 @@ bool PlatformPixelBuffer::setupShm()
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if (!xim)
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goto free_shminfo;
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+ if (xim->bytes_per_line <= 0 ||
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+ xim->height <= 0 ||
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+ xim->height >= INT_MAX / xim->bytes_per_line) {
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+ XDestroyImage(xim);
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+ xim = NULL;
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+ delete shminfo;
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+ shminfo = NULL;
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+ throw rdr::Exception("Invalid display size");
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+ }
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+
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shminfo->shmid = shmget(IPC_PRIVATE,
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8aca67 |
xim->bytes_per_line * xim->height,
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IPC_CREAT|0600);
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