fib: fix mpls db label overflow

mpls fib DB size was 2^20 instead of intended 2^21.
Therefore large mpls labels caused DB to overflow and write
to other tables or some random objects. Or crash with ASAN.
Sometimes.

Type: fix

Signed-off-by: Dmitry Valter <d-valter@yandex-team.ru>
Change-Id: I6db65680037a266fe47e8213464a0c16de63c06c
(cherry picked from commit cf2595dfc0b446dd9bd5311d972cfb53b5567df8)

diff --git a/src/vnet/fib/mpls_fib.h b/src/vnet/fib/mpls_fib.h
index e7ea5d5..e9fee99 100644 (file)
--- a/src/vnet/fib/mpls_fib.h
+++ b/src/vnet/fib/mpls_fib.h
@@ -31,7 +31,7 @@
  * Type exposure is to allow the DP fast/inlined access
  */
 #define MPLS_FIB_KEY_SIZE 21
-#define MPLS_FIB_DB_SIZE (1 << (MPLS_FIB_KEY_SIZE-1))
+#define MPLS_FIB_DB_SIZE (1 << MPLS_FIB_KEY_SIZE)
 
 /**
  * There are no options for controlling the MPLS flow hash,