bech32: fix overflow bug.

Copied from upstream: sipa/bech32@2b0aac6 Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
ElementsProject · Nov 2, 2018 · a1898b6 · a1898b6
1 parent 1935614
commit a1898b6
Showing 1 changed file with 1 addition and 1 deletion.
diff --git a/common/bech32.c b/common/bech32.c
@@ -99,7 +99,7 @@ int bech32_decode(char* hrp, uint8_t *data, size_t *data_len, const char *input,
         ++(*data_len);
     }
     hrp_len = input_len - (1 + *data_len);
-    if (hrp_len < 1 || *data_len < 6) {
+    if (1 + *data_len >= input_len || *data_len < 6) {
         return 0;
     }
     *(data_len) -= 6;