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File _service:download_src_package:unzip-zipbomb-part5.patch of Package unzip
From 5c572555cf5d80309a07c30cf7a54b2501493720 Mon Sep 17 00:00:00 2001 From: Mark Adler <madler@alumni.caltech.edu> Date: Sun, 9 Feb 2020 21:39:09 -0800 Subject: [PATCH] Fix bug in UZinflate() that incorrectly updated G.incnt. The update assumed a full buffer, which is not always full. This could result in a false overlapped element detection when a small deflate-compressed file was unzipped using an old zlib. This commit remedies that. --- inflate.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/inflate.c b/inflate.c index 2f5a015..70e3cc0 100644 --- a/inflate.c +++ b/inflate.c @@ -700,7 +700,7 @@ int UZinflate(__G__ is_defl64) G.dstrm.total_out)); G.inptr = (uch *)G.dstrm.next_in; - G.incnt = (G.inbuf + INBUFSIZ) - G.inptr; /* reset for other routines */ + G.incnt -= G.inptr - G.inbuf; /* reset for other routines */ uzinflate_cleanup_exit: err = inflateReset(&G.dstrm);
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