The one who commits suicide will be doing the same action in hell for eternity without being able to die (so basically, eternity of suicide bombing in hell). Source:

Narrated Abu Huraira: The Prophet (peace be upon him) said, “Whoever purposely throws himself from a mountain and kills himself, will be in the (Hell) Fire falling down into it and abiding therein perpetually forever; and whoever drinks poison and kills himself with it, he will be carrying his poison in his hand and drinking it in the (Hell) Fire wherein he will abide eternally forever; and whoever kills himself with an iron weapon, will be carrying that weapon in his hand and stabbing his abdomen with it in the (Hell) Fire wherein he will abide eternally forever.” Sahih Al-Bukhari – Book 71 Hadith 670

Narrated Abu Huraira: The Prophet (peace be upon him) said, “He who commits suicide by throttling shall keep on throttling himself in the Hell Fire (forever) and he who commits suicide by stabbing himself shall keep on stabbing himself in the Hell-Fire.” Sahih Al-Bukhari – Book 23 Hadith 446