dashboard/app: sort bugs by impact

The impact score is deducted from the title.

Author: tarasmadan

dashboard/app/bug_impact_score.go

@@ -0,0 +1,68 @@
+// Copyright 2025 syzkaller project authors. All rights reserved.
+// Use of this source code is governed by Apache 2 LICENSE that can be found in the LICENSE file.
+
+package main
+
+import "regexp"
+
+// impactOrder represent an ordering of bug impact severity. The earlier
+// entries are considered more severe.
+// The regexps are matched in order, and the first match determines the
+// impact category. A higher index in this slice means lower impact.
+// The last regexp ".*" is a catch-all for unknown bugs.
+var impactOrder = []string{
+	// Memory safety.
+	`^KASAN:.*Write`,
+	`^KASAN:.*Read`,
+	`^WARNING: refcount bug`,
+	`^UBSAN: array-index`,
+	`^BUG: corrupted list`,
+	`^BUG: unable to handle kernel paging request`,
+	// Memory leaks.
+	`^memory leak`,
+	// Uninit memory use.
+	`^KMSAN:`,
+	// Concurrency.
+	`^KCSAN:`,
+	// Locking.
+	`^BUG: sleeping function`,
+	`^BUG: spinlock recursion`,
+	`^BUG: using ([a-z_]+)\\(\\) in preemptible`,
+	`^inconsistent lock state`,
+	`^WARNING: still has locks held`,
+	`^possible deadlock`,
+	`^WARNING: suspicious RCU usage`,
+	// Hangs/stalls.
+	`^BUG: soft lockup`,
+	`^INFO: rcu .* stall`,
+	`^INFO: task hung`,
+	// DoS.
+	`^BUG:`,
+	`^kernel BUG`,
+	`^divide error`,
+	`^Internal error in`,
+	`^kernel panic:`,
+	`^general protection fault`,
+	`.*`,
+}
+
+var impactREs = func() []*regexp.Regexp {
+	res := make([]*regexp.Regexp, len(impactOrder))
+	for i, re := range impactOrder {
+		res[i] = regexp.MustCompile(re)
+	}
+	return res
+}()
+
+// TitleToImpact converts a bug title to an impact score.
+// A higher score indicates a more severe impact.
+// The score is calculated as len(impactOrder) - position of the matching regexp.
+func TitleToImpact(title string) int {
+	for i, re := range impactREs {
+		if re.MatchString(title) {
+			return len(impactOrder) - i
+		}
+	}
+	// Should not happen due to the catch-all regexp.
+	return 0
+}

dashboard/app/entities_datastore.go

@@ -280,6 +280,10 @@ func (bug *Bug) Save() ([]db.Property, error) {
 	return db.SaveStruct(bug)
 }
 
+func (bug *Bug) ImpactScore() int {
+	return TitleToImpact(bug.Title)
+}
+
 type BugDailyStats struct {
 	Date       int // YYYYMMDD
 	CrashCount int

dashboard/app/main.go

@@ -365,6 +365,7 @@ type uiCommit struct {
 type uiBug struct {
 	Namespace      string
 	Title          string
+	ImpactScore    int
 	NumCrashes     int64
 	NumCrashesBad  bool
 	BisectCause    BisectStatus
@@ -1938,6 +1939,7 @@ func createUIBug(c context.Context, bug *Bug, state *ReportingState, managers []
 	uiBug := &uiBug{
 		Namespace:      bug.Namespace,
 		Title:          bug.displayTitle(),
+		ImpactScore:    bug.ImpactScore(),
 		BisectCause:    bug.BisectCause,
 		BisectFix:      bug.BisectFix,
 		NumCrashes:     bug.NumCrashes,

dashboard/app/templates/templates.html

@@ -168,6 +168,7 @@ <h1><a href="/{{$.Namespace}}">syzbot</a></h1>
 			<th><a onclick="return sortTable(this, 'Kernel', textSort)" href="#">Kernel</a></th>
 		{{end}}
 		<th><a onclick="return sortTable(this, 'Title', textSort)" href="#">Title</a></th>
+		<th><a onclick="return sortTable(this, 'ImpactScore', numSort)" href="#">ImpactScore</a></th>
 		<th><a onclick="return sortTable(this, 'Repro', reproSort)" href="#">Repro</a></th>
 		<th><a onclick="return sortTable(this, 'Cause bisect', textSort)" href="#">Cause bisect</a></th>
 		<th><a onclick="return sortTable(this, 'Fix bisect', textSort)" href="#">Fix bisect</a></th>
@@ -202,6 +203,7 @@ <h1><a href="/{{$.Namespace}}">syzbot</a></h1>
 					<span class="bug-label">{{link .Link .Name}}</span>
 				{{- end}}
 			</td>
+			<td class="stat">{{$b.ImpactScore}}</td>
 			<td class="stat">{{formatReproLevel $b.ReproLevel}}</td>
 			<td class="bisect_status">{{print $b.BisectCause}}</td>
 			<td class="bisect_status">{{print $b.BisectFix}}</td>