From: Mika T. Lindqvist <postmaster@raasu.org>
Date: Tue, 19 May 2026 13:06:46 +0000 (+0300)
Subject: Always check that distance is too far back in inflateBack.
X-Git-Url: http://git.ipfire.org/gitweb/?a=commitdiff_plain;h=da22434b657578c41af1bdf06b27304e4aceb00f;p=thirdparty%2Fzlib-ng.git

Always check that distance is too far back in inflateBack.
---

diff --git a/infback.c b/infback.c
index c4d6214fa..a43a8199c 100644
--- a/infback.c
+++ b/infback.c
@@ -460,12 +460,10 @@ int32_t Z_EXPORT PREFIX(inflateBack)(PREFIX3(stream) *strm, in_func in, void *in
                 state->offset += BITS(state->extra);
                 DROPBITS(state->extra);
             }
-#ifdef INFLATE_STRICT
             if (state->offset > state->wsize - (state->whave < state->wsize ? left : 0)) {
                 SET_BAD("invalid distance too far back");
                 break;
             }
-#endif
             TRACE_DISTANCE(state->offset);
 
             /* copy match from window to output */