[Mesa-dev] [Bug 98172] Concurrent call to glClientWaitSync results in segfault in one of the waiters.

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=98172

--- Comment #45 from Suzuki, Shinji <shinji.suzuki at gmail.com> ---
> feeling that solution via serialization of unref-ops blurs the nature of the
> problem that is inherent in the sock code. 
This concern can perhaps be obviated by inserting an explicit check.

   if (screen->fence_finish(screen, pipe, fence, timeout)) {
      mtx_lock(&ctx->Shared->Mutex);
      if( so->fence!= NULL )
        screen->fence_reference(screen, &so->fence, NULL);
      mtx_unlock(&ctx->Shared->Mutex);
      so->b.StatusFlag = GL_TRUE;
   }

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