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authorBenoît Ganne <bganne@cisco.com>2023-02-21 16:09:47 +0100
committerDave Wallace <dwallacelf@gmail.com>2023-05-19 21:14:52 +0000
commite211ac4886d0ae51c08f77c76ed37b76f01f7629 (patch)
tree040d3e41b1cbc4e3cf31fbfec9e3308786eb07cc /src/vnet/dpo/replicate_dpo.h
parent168bb1d55efeba716bd3004a1f3d19cf25c15191 (diff)
fib: fix load-balance and replicate dpos buckets overflow
load-balance and replicate dpos both store their number of buckets as u16, which can overflow if too many paths are configured. For load-balance it can happens quite quickly because of weights normalization. Type: fix Change-Id: I0c78c39fc3d40626dfc58b49e7d99d71f9852b50 Signed-off-by: Benoît Ganne <bganne@cisco.com>
Diffstat (limited to 'src/vnet/dpo/replicate_dpo.h')
-rw-r--r--src/vnet/dpo/replicate_dpo.h8
1 files changed, 8 insertions, 0 deletions
diff --git a/src/vnet/dpo/replicate_dpo.h b/src/vnet/dpo/replicate_dpo.h
index 908c20c1d56..d21f52a4833 100644
--- a/src/vnet/dpo/replicate_dpo.h
+++ b/src/vnet/dpo/replicate_dpo.h
@@ -41,6 +41,12 @@ typedef struct replicate_main_t_
extern replicate_main_t replicate_main;
/**
+ * The number of buckets that a replicate object can have
+ * This must not overflow the rep_n_buckets field
+ */
+#define REP_MAX_BUCKETS 1024
+
+/**
* The number of buckets that a load-balance object can have and still
* fit in one cache-line
*/
@@ -108,6 +114,8 @@ typedef struct replicate_t_ {
STATIC_ASSERT(sizeof(replicate_t) <= CLIB_CACHE_LINE_BYTES,
"A replicate object size exceeds one cacheline");
+STATIC_ASSERT (REP_MAX_BUCKETS <= CLIB_U16_MAX,
+ "Too many buckets for replicate object");
/**
* Flags controlling load-balance formatting/display