Merge pull request #5639

2eef90d6 rpc: restrict the recent cutoff size in restricted RPC mode (moneromooo-monero)
0564da5f ensure no NULL is passed to memcpy (moneromooo-monero)
bc09766b abstract_tcp_server2: improve DoS resistance (moneromooo-monero)
1387549e serialization: check stream good flag at the end (moneromooo-monero)
a00cabd4 tree-hash: allocate variable memory on heap, not stack (moneromooo-monero)
f2152192 cryptonote: throw on tx hash calculation error (moneromooo-monero)
db2b9fba serialization: fail on read_varint error (moneromooo-monero)
68ad5481 cryptonote_protocol: fix another potential P2P DoS (moneromooo-monero)
1cc61018 cryptonote_protocol: expand basic DoS protection (moneromooo-monero)
8f66b705 cryptonote_protocol_handler: prevent potential DoS (anonimal)
39169ace epee: basic sanity check on allocation size from untrusted source (moneromooo-monero)

1 files changed, 2 insertions, 1 deletions

diff --git a/src/crypto/keccak.c b/src/crypto/keccak.c
index 170911262..18ed3152f 100644
--- a/src/crypto/keccak.c
+++ b/src/crypto/keccak.c
@@ -116,7 +116,8 @@ void keccak(const uint8_t *in, size_t inlen, uint8_t *md, int mdlen)
       local_abort("Bad keccak use");
     }
 
-    memcpy(temp, in, inlen);
+    if (inlen > 0)
+      memcpy(temp, in, inlen);
     temp[inlen++] = 1;
     memset(temp + inlen, 0, rsiz - inlen);
     temp[rsiz - 1] |= 0x80;