[google/syzkaller] b3eac4: executor: increase CoverFilter regions to 8

[Konstantin Bogomolov]

Branch: refs/heads/gh-readonly-queue/master/pr-7728-52aa282067b042d7b87d20904b88b0319f19e02b
Home: https://github.com/google/syzkaller
Commit: b3eac40eb600789de41315f6565ecf77bcd6caa0
https://github.com/google/syzkaller/commit/b3eac40eb600789de41315f6565ecf77bcd6caa0
Author: Konstantin Bogomolov <bogo...@google.com>
Date: 2026-08-05 (Wed, 05 Aug 2026)

Changed paths:
M executor/cover_filter.h
M executor/test.h

Log Message:
-----------
executor: increase CoverFilter regions to 8

Increase kNumRegions from 4 to 8 in CoverFilter to allow coverage
filtering across up to 8 distinct 1GB memory regions.

When fuzzing targets with scattered symbol addresses or dense coverage
IDs (e.g., gVisor), the filtered PCs can easily span more than 4
non-contiguous 1GB address regions, causing CoverFilter to fail with
"coverage filter is full". Increasing kNumRegions to 8 adds minimal
overhead while supporting broader virtual address layouts.



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[Konstantin Bogomolov]

Branch: refs/heads/master