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fix: sanitize workspace agent logs before insert (#24028)

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Workspace agent logs could still fail after the earlier invalid UTF-8
fix because NUL bytes are valid Go/protobuf strings but are rejected by
Postgres text columns. The legacy HTTP log upload path also bypassed the
old sanitization entirely, and both server insert paths computed
logs_length from the unsanitized input.

Add a shared log-output sanitizer in agentsdk, use it in the protobuf
conversion path and both server-side insert paths, and compute
OutputLength from the sanitized string so overflow accounting matches
what is actually stored. This keeps the old invalid UTF-8 behavior while
also handling embedded NUL bytes consistently across DRPC and HTTP log
ingestion.

Refs [#23292 ](https://github.com/coder/coder/issues/23292)
Refs [#13433 ](https://github.com/coder/coder/issues/13433)
This commit is contained in:
dylanhuff-at-coder
2026-04-08 16:29:38 -07:00
committed by GitHub
parent 7caef4987f
commit f4240bb8c1
8 changed files with 169 additions and 11 deletions
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coderd/agentapi/logs.go
+3 -2
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@@ -77,8 +77,9 @@ func (a *LogsAPI) BatchCreateLogs(ctx context.Context, req *agentproto.BatchCrea
level := make([]database.LogLevel, 0)
outputLength := 0
for _, logEntry := range req.Logs {
output = append(output, logEntry.Output)
outputLength += len(logEntry.Output)
sanitizedOutput := agentsdk.SanitizeLogOutput(logEntry.Output)
output = append(output, sanitizedOutput)
outputLength += len(sanitizedOutput)
var dbLevel database.LogLevel
switch logEntry.Level {