27 lines
800 B
Diff
27 lines
800 B
Diff
From 4346a16853e19b45787ce933666026903fb8f3f8 Mon Sep 17 00:00:00 2001
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From: Mark Adler <madler@alumni.caltech.edu>
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Date: Tue, 17 Apr 2018 22:44:41 -0700
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Subject: [PATCH 2/2] Assure that the number of bits for deflatePrime() is
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valid.
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---
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deflate.c | 3 ++-
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1 file changed, 2 insertions(+), 1 deletion(-)
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diff --git a/deflate.c b/deflate.c
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index 19cba87..23aef18 100644
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--- a/deflate.c
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+++ b/deflate.c
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@@ -589,7 +589,8 @@ int ZEXPORT deflatePrime (strm, bits, value)
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if (deflateStateCheck(strm)) return Z_STREAM_ERROR;
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s = strm->state;
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- if (s->sym_buf < s->pending_out + ((Buf_size + 7) >> 3))
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+ if (bits < 0 || bits > 16 ||
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+ s->sym_buf < s->pending_out + ((Buf_size + 7) >> 3))
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return Z_BUF_ERROR;
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do {
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put = Buf_size - s->bi_valid;
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--
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2.33.1
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