[Bugfix] Fix `vocab_size` field access in `llava_next.py` (#6624)

vllm/model_executor/models/llava.py

@@ -155,7 +155,8 @@ class LlavaForConditionalGeneration(nn.Module, SupportsVision):
             quant_config=quant_config)
         logit_scale = getattr(config, "logit_scale", 1.0)
         self.logits_processor = LogitsProcessor(self.unpadded_vocab_size,
-                                                config.vocab_size, logit_scale)
+                                                config.text_config.vocab_size,
+                                                logit_scale)
         self.sampler = Sampler()
 
     def _validate_pixel_values(self, data: torch.Tensor) -> torch.Tensor:

vllm/model_executor/models/llava_next.py

@@ -249,7 +249,8 @@ class LlavaNextForConditionalGeneration(nn.Module, SupportsVision):
             quant_config=quant_config)
         logit_scale = getattr(config, "logit_scale", 1.0)
         self.logits_processor = LogitsProcessor(self.unpadded_vocab_size,
-                                                config.vocab_size, logit_scale)
+                                                config.text_config.vocab_size,
+                                                logit_scale)
         self.sampler = Sampler()
 
         self.image_newline = nn.Parameter(