1.1 Major Step flashing lifted at the chimney
The metal flashing where the chimney meets the roof has lifted along the east side, and the sealant over it is cracked. Daylight is visible along about 60 cm of the joint. There is a faint stain on the attic sheathing below, which suggests water has already found its way in.
Suggested: Have a roofer re-flash the chimney and check the sheathing beneath. Do this before the wet season, and look at the attic again once it has been repaired.