Fix inflateBack to detect invalid input with distances too far.

diff --git a/infback.c b/infback.c
index 95798511f79f934211e4aa72c9d07c530f5b8f6a..200997c4677c357d74d4dfa5b158224629043558 100644 (file)
--- a/infback.c
+++ b/infback.c
@@ -55,6 +55,7 @@ int32_t ZNG_CONDEXPORT PREFIX(inflateBackInit)(PREFIX3(stream) *strm, int32_t wi
     state->window = window;
     state->wnext = 0;
     state->whave = 0;
+    state->sane = 1;
     state->chunksize = functable.chunksize();
     return Z_OK;
 }