Merge "BootReceiver: cap the number of sent kernel memory corruptions" into sc-dev (46c0a4b9) · Commits · e / os / android_frameworks_base

services/core/java/com/android/server/BootReceiver.java

+6 −2

Original line number	Diff line number	Diff line
		@@ -128,6 +128,9 @@ public class BootReceiver extends BroadcastReceiver {
		// Location of ftrace pipe for notifications from kernel memory tools like KFENCE and KASAN.
		private static final String ERROR_REPORT_TRACE_PIPE =
		"/sys/kernel/tracing/instances/bootreceiver/trace_pipe";
		// Stop after sending this many reports. See http://b/182159975.
		private static final int MAX_ERROR_REPORTS = 8;
		private static int sSentReports = 0;
		// Avoid reporing the same bug from processDmesg() twice.
		private static String sLastReportedBug = null;

		@@ -301,7 +304,7 @@ public class BootReceiver extends BroadcastReceiver {
		* - repeat the above steps till the last report is found.
		*/
		private void processDmesg(Context ctx) throws IOException {

		if (sSentReports == MAX_ERROR_REPORTS) return;
		/*
		* Only SYSTEM_KASAN_ERROR_REPORT and SYSTEM_KFENCE_ERROR_REPORT are supported at the
		* moment.
		@@ -352,7 +355,7 @@ public class BootReceiver extends BroadcastReceiver {
		}

		// Avoid sending the same bug report twice.
		if (bugTitle == sLastReportedBug) return;
		if (bugTitle.equals(sLastReportedBug)) return;

		final String reportTag = "SYSTEM_" + tool + "_ERROR_REPORT";
		final DropBoxManager db = ctx.getSystemService(DropBoxManager.class);
		@@ -361,6 +364,7 @@ public class BootReceiver extends BroadcastReceiver {

		addTextToDropBox(db, reportTag, reportText, "/dev/kmsg", LOG_SIZE);
		sLastReportedBug = bugTitle;
		sSentReports++;
		}

		private void removeOldUpdatePackages(Context context) {