On 03/08/15 13:33, Emil Velikov wrote:
> On 31 July 2015 at 11:02, Frank Binns <frank.bi...@imgtec.com> wrote:
>> When calling either eglCreateWindowSurface or eglCreatePixmapSurface it
>> was possible for an application to be aborted as a result of it failing
>> to create a DRI2 drawable on the server. This could happen due to an
>> application passing in an invalid native drawable handle, for example.
>>
>> Signed-off-by: Frank Binns <frank.bi...@imgtec.com>
>> ---
>> src/egl/drivers/dri2/platform_x11.c | 18 +++++++++++++++++-
>> 1 file changed, 17 insertions(+), 1 deletion(-)
>>
>> diff --git a/src/egl/drivers/dri2/platform_x11.c
>> b/src/egl/drivers/dri2/platform_x11.c
>> index d35e9e2..830e643 100644
>> --- a/src/egl/drivers/dri2/platform_x11.c
>> +++ b/src/egl/drivers/dri2/platform_x11.c
>> @@ -284,7 +284,23 @@ dri2_x11_create_surface(_EGLDriver *drv, _EGLDisplay
>> *disp, EGLint type,
>> }
>>
>> if (dri2_dpy->dri2) {
>> - xcb_dri2_create_drawable (dri2_dpy->conn, dri2_surf->drawable);
>> + xcb_void_cookie_t cookie;
>> +
>> + cookie = xcb_dri2_create_drawable_checked(dri2_dpy->conn,
>> + dri2_surf->drawable);
>> + error = xcb_request_check(dri2_dpy->conn, cookie);
>> + if (error != NULL) {
>> + if (error->error_code == BadAlloc || type == EGL_PBUFFER_BIT)
>> + _eglError(EGL_BAD_ALLOC, "xcb_dri2_create_drawable_checked");
>> + else if (type == EGL_WINDOW_BIT)
>> + _eglError(EGL_BAD_NATIVE_WINDOW,
>> + "xcb_dri2_create_drawable_checked");
>> + else
>> + _eglError(EGL_BAD_NATIVE_PIXMAP,
>> + "xcb_dri2_create_drawable_checked");
> Similar to previous commit - shouldn't one check for BadAlloc prior to
> these two ?
>
> Would be great if we get another pair of eyes looking this way though
> - XCB is not my forte. I wonder if we should pick this (and? patch 2)
> for stable - crashing is never a good idea.
>
> Thanks
> Emil
It looks like xcb_request_check will return NULL if there was a previous
error on the connection, e.g. it ran out of memory. I'll update the
patch to deal with this.
Thanks
Frank
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