Subject: [PATCH] Fixed inflateSyncPoint() bad return value on z15

---

 contrib/s390/dfltcc.h | 4 ++++

 inflate.c             | 2 ++

 2 files changed, 6 insertions(+)

diff --git a/contrib/s390/dfltcc.h b/contrib/s390/dfltcc.h

index 574e84c..7960626 100644

--- a/contrib/s390/dfltcc.h

+++ b/contrib/s390/dfltcc.h

@@ -51,5 +51,9 @@ int ZLIB_INTERNAL dfltcc_inflate_disable OF((z_streamp strm));

     do { \

         if (dfltcc_was_inflate_used((strm))) return -(1L << 16); \

     } while (0)

+#define INFLATE_SYNC_POINT_HOOK(strm) \

+    do { \

+        if (dfltcc_was_inflate_used((strm))) return Z_STREAM_ERROR; \

+    } while (0)

 #endif

\ No newline at end of file

diff --git a/inflate.c b/inflate.c

index f77c2ae..596034c 100644

--- a/inflate.c

+++ b/inflate.c

@@ -100,6 +100,7 @@

 #define INFLATE_NEED_CHECKSUM(strm) 1

 #define INFLATE_NEED_UPDATEWINDOW(strm) 1

 #define INFLATE_MARK_HOOK(strm) do {} while (0)

+#define INFLATE_SYNC_POINT_HOOK(strm) do {} while (0)

 #endif

 #ifdef MAKEFIXED

@@ -1483,6 +1484,7 @@ z_streamp strm;

     struct inflate_state FAR *state;

     if (inflateStateCheck(strm)) return Z_STREAM_ERROR;

+    INFLATE_SYNC_POINT_HOOK(strm);

     state = (struct inflate_state FAR *)strm->state;

     return state->mode == STORED && state->bits == 0;

 }

-- 

2.26.0