fix: ByteFmt panic on negative int64 values (#1200)

Author: Copilot

pkg/util/bytefmt.go

@@ -5,14 +5,27 @@ import (
 	"math"
 )
 
+const unknownSize = "unknown"
+
 var unitArr = []string{"B", "KB", "MB", "GB", "TB", "PB", "EB"}
 
 func ByteFmt(size int64) string {
 	if size == 0 {
-		return "unknown"
+		return unknownSize
+	}
+	// Handle negative values
+	if size < 0 {
+		return unknownSize
 	}
 	fs := float64(size)
 	p := int(math.Log(fs) / math.Log(1024))
+	// Ensure index is within bounds
+	if p < 0 {
+		p = 0
+	}
+	if p >= len(unitArr) {
+		p = len(unitArr) - 1
+	}
 	val := fs / math.Pow(1024, float64(p))
 	_, frac := math.Modf(val)
 	if frac > 0 {

pkg/util/bytefmt_test.go

@@ -14,7 +14,17 @@ func TestByteFmt(t *testing.T) {
 		{
 			name: "unknown",
 			args: args{size: int64(0)},
-			want: "unknown",
+			want: unknownSize,
+		},
+		{
+			name: "negative value",
+			args: args{size: int64(-1)},
+			want: unknownSize,
+		},
+		{
+			name: "negative min int64",
+			args: args{size: int64(-9223372036854775808)},
+			want: unknownSize,
 		},
 		{
 			name: "100B",
@@ -51,6 +61,11 @@ func TestByteFmt(t *testing.T) {
 			args: args{size: int64(1024 * 1024 * 2)},
 			want: "2MB",
 		},
+		{
+			name: "large value",
+			args: args{size: int64(9223372036854775807)}, // max int64
+			want: "8EB",
+		},
 	}
 	for _, tt := range tests {
 		t.Run(tt.name, func(t *testing.T) {