From 5105015f5d3679b0491db46de3459945b2d62b90 Mon Sep 17 00:00:00 2001
From: Michael Eischer <michael.eischer@fau.de>
Date: Sat, 16 May 2026 13:15:31 +0200
Subject: [PATCH] check: filter packs while holding blobRefs lock

Not an actual problem with the current usage. But for consistency always
take the lock when interacting with blobRefs.
---
 internal/checker/checker.go | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/internal/checker/checker.go b/internal/checker/checker.go
index 0d3a908b8..522729a16 100644
--- a/internal/checker/checker.go
+++ b/internal/checker/checker.go
@@ -302,6 +302,9 @@ func (c *Checker) ReadPacks(ctx context.Context, filter func(packs map[restic.ID
 
 	packfileFilter := func(allPacks map[restic.ID]int64) map[restic.ID]int64 {
 		filteredPacks := make(map[restic.ID]int64)
+		c.blobRefs.Lock()
+		defer c.blobRefs.Unlock()
+
 		// convert used blobs into their encompassing packfiles
 		for bh := range c.blobRefs.M.Keys() {
 			for _, pb := range c.repo.LookupBlob(bh.Type, bh.ID) {