From 4111f29c3f110d7e45727f30a6a2b475a5e228fc Mon Sep 17 00:00:00 2001
From: Maurus Decimus <11444311+mdecimus@users.noreply.github.com>
Date: Tue, 28 Apr 2026 12:00:52 +0200
Subject: [PATCH] Fix: Skip invalid entries in log files

---
 CHANGELOG.md                            |  1 +
 crates/jmap/src/registry/mapping/log.rs | 17 +++++++++++++++++
 2 files changed, 18 insertions(+)

diff --git a/CHANGELOG.md b/CHANGELOG.md
index d8a25772..eefbe124 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -16,6 +16,7 @@ If you are upgrading from v0.16.x, replace the binary (or run `docker pull`). If
 - DNS Updater:
   - BunnyDNS: Use subdomain as name of record instead of FQDN.
   - RFC2136: Chunk TXT records.
+- Skip invalid entries in log files.
 
 ## [0.16.1] - 2026-04-25
 
diff --git a/crates/jmap/src/registry/mapping/log.rs b/crates/jmap/src/registry/mapping/log.rs
index 26907dd2..66536c1b 100644
--- a/crates/jmap/src/registry/mapping/log.rs
+++ b/crates/jmap/src/registry/mapping/log.rs
@@ -181,6 +181,11 @@ fn read_log_offsets(
         for line in rev_lines {
             let line = line?;
             offset = offset.saturating_sub(line.len() as u64 + 1); // +1 for the newline character
+
+            if !is_log_header(&line) {
+                continue;
+            }
+
             let id = (file_number << 48) | offset;
 
             if !found_anchor {
@@ -267,6 +272,18 @@ fn read_log_entries(
     Ok(entries)
 }
 
+fn is_log_header(line: &str) -> bool {
+    let line = strip_ansi(line);
+    let bytes = line.as_bytes();
+    if bytes.is_empty() || !bytes[0].is_ascii_digit() {
+        return false;
+    }
+    let Some((timestamp, _)) = line.split_once(' ') else {
+        return false;
+    };
+    DateTime::parse_from_rfc3339(timestamp).is_ok()
+}
+
 fn log_from_line(line: &str) -> Option<Log> {
     let line = strip_ansi(line);
     let (timestamp, rest) = line.split_once(' ')?;