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From 5eaae2af0defeca148c2a281873bb31a15246876 Mon Sep 17 00:00:00 2001
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From: Ilya Leoshkevich <iii@linux.ibm.com>
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Date: Thu, 2 Feb 2023 19:34:24 +0100
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Subject: [PATCH] 2155328
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---
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contrib/s390/dfltcc.c | 21 +++++++++++++++------
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1 file changed, 15 insertions(+), 6 deletions(-)
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diff --git a/contrib/s390/dfltcc.c b/contrib/s390/dfltcc.c
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index 72099e7..f8dc21c 100644
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--- a/contrib/s390/dfltcc.c
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+++ b/contrib/s390/dfltcc.c
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@@ -456,7 +456,10 @@ again:
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*strm->next_out = (Bytef)state->bi_buf;
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/* Honor history and check value */
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param->nt = 0;
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- param->cv = state->wrap == 2 ? ZSWAP32(strm->adler) : strm->adler;
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+ if (state->wrap == 1)
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+ param->cv = strm->adler;
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+ else if (state->wrap == 2)
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+ param->cv = ZSWAP32(strm->adler);
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/* When opening a block, choose a Huffman-Table Type */
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if (!param->bcf) {
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@@ -488,7 +491,10 @@ again:
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state->bi_buf = 0; /* Avoid accessing next_out */
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else
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state->bi_buf = *strm->next_out & ((1 << state->bi_valid) - 1);
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- strm->adler = state->wrap == 2 ? ZSWAP32(param->cv) : param->cv;
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+ if (state->wrap == 1)
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+ strm->adler = param->cv;
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+ else if (state->wrap == 2)
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+ strm->adler = ZSWAP32(param->cv);
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/* Unmask the input data */
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strm->avail_in += masked_avail_in;
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@@ -600,11 +606,12 @@ dfltcc_inflate_action ZLIB_INTERNAL dfltcc_inflate(strm, flush, ret)
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}
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/* Translate stream to parameter block */
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- param->cvt = state->flags ? CVT_CRC32 : CVT_ADLER32;
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+ param->cvt = ((state->wrap & 4) && state->flags) ? CVT_CRC32 : CVT_ADLER32;
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param->sbb = state->bits;
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if (param->hl)
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param->nt = 0; /* Honor history for the first block */
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- param->cv = state->flags ? ZSWAP32(state->check) : state->check;
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+ if (state->wrap & 4)
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+ param->cv = state->flags ? ZSWAP32(state->check) : state->check;
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/* Inflate */
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do {
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@@ -615,7 +622,9 @@ dfltcc_inflate_action ZLIB_INTERNAL dfltcc_inflate(strm, flush, ret)
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strm->msg = oesc_msg(dfltcc_state->msg, param->oesc);
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state->last = cc == DFLTCC_CC_OK;
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state->bits = param->sbb;
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- strm->adler = state->check = state->flags ? ZSWAP32(param->cv) : param->cv;
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+ if (state->wrap & 4)
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+ strm->adler = state->check = state->flags ?
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+ ZSWAP32(param->cv) : param->cv;
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if (cc == DFLTCC_CC_OP2_CORRUPT && param->oesc != 0) {
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/* Report an error if stream is corrupted */
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state->mode = BAD;
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@@ -1077,4 +1086,4 @@ int ZLIB_INTERNAL dfltcc_inflate_get_dictionary(strm, dictionary, dict_length)
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if (dict_length)
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*dict_length = param->hl;
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return Z_OK;
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-}
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\ No newline at end of file
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+}
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--
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2.39.1
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