silence l2fib_init() invalid read of size 2 found by address-sanitizer
l2fib_make_key() casts and reads the input 6-Bytes mac_address as u64,
therefore if the mac_address is declared with 6 Bytes only, address-sanitizer
rightly triggers an invalid read on the last two Bytes.
However, l2fib_make_key() does a 16 bits shift to discard those 2 values,
therefore, this invalid read is of no consequence (and so can be silenced safely).
Change-Id: I38646fe60073093d25cdf135185d4c96136d55d0
Signed-off-by: Gabriel Ganne <gabriel.ganne@enea.com>
diff --git a/src/vnet/l2/l2_fib.h b/src/vnet/l2/l2_fib.h
index 6346826..60c197f 100644
--- a/src/vnet/l2/l2_fib.h
+++ b/src/vnet/l2/l2_fib.h
@@ -148,7 +148,12 @@
return result % L2FIB_NUM_BUCKETS;
}
-always_inline u64
+/**
+ * make address sanitizer skip this:
+ * The 6-Bytes mac-address is cast into an 8-Bytes u64, with 2 additional Bytes.
+ * l2fib_make_key() does read those two Bytes but does not use them.
+ */
+always_inline u64 __attribute__ ((no_sanitize_address))
l2fib_make_key (u8 * mac_address, u16 bd_index)
{
u64 temp;