Overrun and Sanctuary

What does constitute an attack for the purpose of BREAKING the Sanctuary spell? Can warded creature attempt to move through enemy squares without breaking it by using Overrun?
Will this maneuver break the spell always?
Will this maneuver break the spell only if the creature not get out of the way, requiring an attack roll?
How angry would you be if GM ruled that overrun does not break sanctuary unless it knocks the enemy prone?

“All offensive combat actions, even those that don't damage opponents, are considered attacks.“

A quote pulled from the special spell effects section of the Magic rules, but one that is used as the Paizo standard for an “attack.”

Overrun is, without a doubt, an attack. It is a targeted maneuver that has the possibility of hampering the target. An individual with the Sanctuary spell on them cannot make an Overrun combat maneuver without breaking the spell, regardless of if the target of the maneuver chooses to let them pass or if any attack roll is made. (Not all attacks require attack rolls, given that a multitude of attack spells do not require attack rolls).

If you make any sort of attack roll against the creature it's definitely a no.

So no overrun, because it's a combat maneuver against the creature.
Edit: I just realized this isn't a question of what does Sanctuary protect you from, but what can you do while under Sanctuary without ending the spell.

Overrun is still out because it's still an attack against a creature.

I could see a grey area where the spell doesn't break because you don't have Improved Overrun and they step out of the way, but for ease of play I would rule it breaks.

If a GM ruled that it only broke if an enemy was knocked prone I'd be annoyed, because making any attack roll (including maneuvers) should definitely break it, regardless of success.

So if someone with sanctuary wants to pass through blocked corridor without breaking Sanctuary their only option is to Acrobatics check DC+5?

So if someone with sanctuary wants to pass through blocked corridor without breaking Sanctuary their only option is to Acrobatics check DC+5?

Or any way that includes not attacking... there are a multitude of magical ways... Dimension door, teleport,stoneshape on stone walls, wood shape on wood walls, passwall, etc...

Not to mention, if you fail your check to move around them with acrobatics and you have sanctuary on, they can't take their AoO (assuming they failed their will save on sanctuary), meaning you can sit there and try again with another move action (a failed check only wastes the current move action), or just wait for next round, for as many rounds as you have sanctuary in effect.

Well, problem is skill checks don't auto-succeed on 20, so character with 8 dex and no ranks have no chance against anyone with CMD of 20+.

Anyway, thanks for the answers!

I mean, if they're purposefully blocking you what did you think your chances of them moving out of the way (of the overrun) would be? Cause I would assume that's 0.

There are ways of moving people out of the way. But Sanctuary isn't it. And many of them involve things that would break it.

I mean, the blocker can't attack the protected creature, but they're still physically in the way. Sanctuary doesn't make you incorporeal.

How angry would you be if GM ruled that overrun does not break sanctuary unless it knocks the enemy prone?

I am not sure anger is what I would feel^^