Merge branch 'dev/11/fp3/security-aosp-rvc-release' into int/11/fp3

* dev/11/fp3/security-aosp-rvc-release:
  Fix a bug when getting a gzip header extra field with inflate().

Change-Id: I236860f63d14c350b92b9aca646782880f9ef6a7
diff --git a/contrib/optimizations/inflate.c b/contrib/optimizations/inflate.c
index 81d558b..93776ac 100644
--- a/contrib/optimizations/inflate.c
+++ b/contrib/optimizations/inflate.c
@@ -771,8 +771,9 @@
                 if (copy > have) copy = have;
                 if (copy) {
                     if (state->head != Z_NULL &&
-                        state->head->extra != Z_NULL) {
-                        len = state->head->extra_len - state->length;
+                        state->head->extra != Z_NULL &&
+                        (len = state->head->extra_len - state->length) <
+                            state->head->extra_max) {
                         zmemcpy(state->head->extra + len, next,
                                 len + copy > state->head->extra_max ?
                                 state->head->extra_max - len : copy);
diff --git a/inflate.c b/inflate.c
index 68902e8..9057a57 100644
--- a/inflate.c
+++ b/inflate.c
@@ -760,8 +760,9 @@
                 if (copy > have) copy = have;
                 if (copy) {
                     if (state->head != Z_NULL &&
-                        state->head->extra != Z_NULL) {
-                        len = state->head->extra_len - state->length;
+                        state->head->extra != Z_NULL &&
+                        (len = state->head->extra_len - state->length) <
+                            state->head->extra_max) {
                         zmemcpy(state->head->extra + len, next,
                                 len + copy > state->head->extra_max ?
                                 state->head->extra_max - len : copy);