# Swashbuckler rogue: does sneak attack fail if you have both advantage & disadvantage? [duplicate]

I am having a bit of an argument with my DM.

The rules say that you can have sneak attack if "you don’t have disadvantage on the attack roll".

If I have both advantage and disadvantage, that results in a straight roll when attacking. A straight roll suggests that sneak attack is allowed.

My DM interprets it as, if I have a source of disadvantage, regardless of weather I also have advantage or not, the fact I am being disadvantaged in some way prevents sneak attack from triggering.

Can someone please let me know who has the correct interpretation?