From c7d5c9de7fc031a348503c2abbfbff7d63de7c68 Mon Sep 17 00:00:00 2001
From: Seongmin Lee <git@boltless.me>
Date: Sat, 22 Aug 2026 16:56:00 +0900
Subject: [PATCH] knotmirror: cap backoff retries

fix: <https://tangled.org/tangled.org/core/issues/742>

Signed-off-by: Seongmin Lee <git@boltless.me>
---
 knotmirror/resyncer.go | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/knotmirror/resyncer.go b/knotmirror/resyncer.go
index 4d64466f7..966b04adc 100644
--- a/knotmirror/resyncer.go
+++ b/knotmirror/resyncer.go
@@ -411,6 +411,8 @@ func (r *Resyncer) handleResyncFailure(ctx context.Context, repoDid syntax.DID,
 }
 
 func backoff(retries int, max int) time.Duration {
+	// Cap retries to prevent bit shift overflow
+	retries = min(retries, 30)
 	dur := min(1<<retries, max)
 	jitter := time.Millisecond * time.Duration(rand.Intn(1000))
 	return time.Second*time.Duration(dur) + jitter
-- 
2.51.2