Commit 2a0d1371 authored by Rocky Automation's avatar Rocky Automation 📺
Browse files

import zlib-1.2.11-17.el8

parent 08c2821c
Subject: [PATCH] Fixed DFLTCC compression level switching issues
---
configure | 4 +--
contrib/s390/dfltcc.c | 52 ++++++++++++++++++++++++++++++-----
contrib/s390/dfltcc_deflate.h | 2 ++
deflate.c | 12 ++++----
test/infcover.c | 2 +-
5 files changed, 57 insertions(+), 15 deletions(-)
diff --git a/configure b/configure
index bfe4386..70ed86b 100755
--- a/configure
+++ b/configure
@@ -139,7 +139,7 @@ case "$1" in
-w* | --warn) warn=1; shift ;;
-d* | --debug) debug=1; shift ;;
--dfltcc)
- CFLAGS="$CFLAGS -DDFLTCC"
+ CFLAGS="$CFLAGS -DDFLTCC -DDFLTCC_LEVEL_MASK=0x7e"
OBJC="$OBJC dfltcc.o"
PIC_OBJC="$PIC_OBJC dfltcc.lo"
shift
@@ -838,7 +838,7 @@ cat > $test.c << EOF
#include <sys/sdt.h>
int main() { return 0; }
EOF
-if try ${CC} ${CFLAGS} $test.c; then
+ if try $CC -c $CFLAGS $test.c; then
echo "Checking for sys/sdt.h ... Yes." | tee -a configure.log
CFLAGS="$CFLAGS -DHAVE_SYS_SDT_H"
SFLAGS="$SFLAGS -DHAVE_SYS_SDT_H"
diff --git a/contrib/s390/dfltcc.c b/contrib/s390/dfltcc.c
index d88a0d6..94a196f 100644
--- a/contrib/s390/dfltcc.c
+++ b/contrib/s390/dfltcc.c
@@ -350,8 +350,12 @@ int ZLIB_INTERNAL dfltcc_deflate(strm, flush, result)
int soft_bcc;
int no_flush;
- if (!dfltcc_can_deflate(strm))
+ if (!dfltcc_can_deflate(strm)) {
+ /* Clear history. */
+ if (flush == Z_FULL_FLUSH)
+ param->hl = 0;
return 0;
+ }
again:
masked_avail_in = 0;
@@ -376,7 +380,8 @@ again:
/* Clear history. */
if (flush == Z_FULL_FLUSH)
param->hl = 0;
- *result = need_more;
+ /* Trigger block post-processing if necessary. */
+ *result = no_flush ? need_more : block_done;
return 1;
}
@@ -403,13 +408,18 @@ again:
param->bcf = 0;
dfltcc_state->block_threshold =
strm->total_in + dfltcc_state->block_size;
- if (strm->avail_out == 0) {
- *result = need_more;
- return 1;
- }
}
}
+ /* No space for compressed data. If we proceed, dfltcc_cmpr() will return
+ * DFLTCC_CC_OP1_TOO_SHORT without buffering header bits, but we will still
+ * set BCF=1, which is wrong. Avoid complications and return early.
+ */
+ if (strm->avail_out == 0) {
+ *result = need_more;
+ return 1;
+ }
+
/* The caller gave us too much data. Pass only one block worth of
* uncompressed data to DFLTCC and mask the rest, so that on the next
* iteration we start a new block.
@@ -737,10 +747,15 @@ __attribute__((constructor)) local void init_globals(void)
* compiling with -m31, gcc defaults to ESA mode, however, since the kernel
* is 64-bit, it's always z/Architecture mode at runtime.
*/
- __asm__ volatile(".machinemode push\n"
+ __asm__ volatile(
+#ifndef __clang__
+ ".machinemode push\n"
".machinemode zarch\n"
+#endif
"stfle %[facilities]\n"
+#ifndef __clang__
".machinemode pop\n"
+#endif
: [facilities] "=Q" (cpu_facilities)
, [r0] "+r" (r0)
:
@@ -872,6 +887,28 @@ int ZLIB_INTERNAL dfltcc_deflate_params(strm, level, strategy, flush)
return Z_OK;
}
+int ZLIB_INTERNAL dfltcc_deflate_done(strm, flush)
+ z_streamp strm;
+ int flush;
+{
+ deflate_state FAR *state = (deflate_state FAR *)strm->state;
+ struct dfltcc_state FAR *dfltcc_state = GET_DFLTCC_STATE(state);
+ struct dfltcc_param_v0 FAR *param = &dfltcc_state->param;
+
+ /* When deflate(Z_FULL_FLUSH) is called with small avail_out, it might
+ * close the block without resetting the compression state. Detect this
+ * situation and return that deflation is not done.
+ */
+ if (flush == Z_FULL_FLUSH && strm->avail_out == 0)
+ return 0;
+
+ /* Return that deflation is not done if DFLTCC is used and either it
+ * buffered some data (Continuation Flag is set), or has not written EOBS
+ * yet (Block-Continuation Flag is set).
+ */
+ return !dfltcc_can_deflate(strm) || (!param->cf && !param->bcf);
+}
+
/*
Preloading history.
*/
@@ -925,6 +962,7 @@ int ZLIB_INTERNAL dfltcc_deflate_set_dictionary(strm, dictionary, dict_length)
append_history(param, state->window, dictionary, dict_length);
state->strstart = 1; /* Add FDICT to zlib header */
+ state->block_start = state->strstart; /* Make deflate_stored happy */
return Z_OK;
}
diff --git a/contrib/s390/dfltcc_deflate.h b/contrib/s390/dfltcc_deflate.h
index de36784..914daa4 100644
--- a/contrib/s390/dfltcc_deflate.h
+++ b/contrib/s390/dfltcc_deflate.h
@@ -11,6 +11,7 @@ int ZLIB_INTERNAL dfltcc_deflate_params OF((z_streamp strm,
int level,
int strategy,
int *flush));
+int ZLIB_INTERNAL dfltcc_deflate_done OF((z_streamp strm, int flush));
int ZLIB_INTERNAL dfltcc_deflate_set_dictionary OF((z_streamp strm,
const Bytef *dictionary,
uInt dict_length));
@@ -41,6 +42,7 @@ int ZLIB_INTERNAL dfltcc_deflate_get_dictionary OF((z_streamp strm,
if (err == Z_STREAM_ERROR) \
return err; \
} while (0)
+#define DEFLATE_DONE dfltcc_deflate_done
#define DEFLATE_BOUND_ADJUST_COMPLEN(strm, complen, source_len) \
do { \
if (dfltcc_can_deflate((strm))) \
diff --git a/deflate.c b/deflate.c
index d907a1b..085abbe 100644
--- a/deflate.c
+++ b/deflate.c
@@ -75,6 +75,7 @@ const char deflate_copyright[] =
#define DEFLATE_GET_DICTIONARY_HOOK(strm, dict, dict_len) do {} while (0)
#define DEFLATE_RESET_KEEP_HOOK(strm) do {} while (0)
#define DEFLATE_PARAMS_HOOK(strm, level, strategy, hook_flush) do {} while (0)
+#define DEFLATE_DONE(strm, flush) 1
#define DEFLATE_BOUND_ADJUST_COMPLEN(strm, complen, sourceLen) do {} while (0)
#define DEFLATE_NEED_CONSERVATIVE_BOUND(strm) 0
#define DEFLATE_HOOK(strm, flush, bstate) 0
@@ -605,14 +606,15 @@ int ZEXPORT deflateParams(strm, level, strategy)
DEFLATE_PARAMS_HOOK(strm, level, strategy, &hook_flush);
func = configuration_table[s->level].func;
- if ((strategy != s->strategy || func != configuration_table[level].func ||
- hook_flush != Z_NO_FLUSH) && s->last_flush != -2) {
+ if (((strategy != s->strategy || func != configuration_table[level].func) &&
+ s->last_flush != -2) || hook_flush != Z_NO_FLUSH) {
/* Flush the last buffer: */
- int err = deflate(strm, RANK(hook_flush) > RANK(Z_BLOCK) ?
- hook_flush : Z_BLOCK);
+ int flush = RANK(hook_flush) > RANK(Z_BLOCK) ? hook_flush : Z_BLOCK;
+ int err = deflate(strm, flush);
if (err == Z_STREAM_ERROR)
return err;
- if (strm->avail_in || (s->strstart - s->block_start) + s->lookahead)
+ if (strm->avail_in || (s->strstart - s->block_start) + s->lookahead ||
+ !DEFLATE_DONE(strm, flush))
return Z_BUF_ERROR;
}
if (s->level != level) {
diff --git a/test/infcover.c b/test/infcover.c
index a34cd17..a208219 100644
--- a/test/infcover.c
+++ b/test/infcover.c
@@ -373,7 +373,7 @@ local void cover_support(void)
mem_setup(&strm);
strm.avail_in = 0;
strm.next_in = Z_NULL;
- ret = inflateInit_(&strm, ZLIB_VERSION - 1, (int)sizeof(z_stream));
+ ret = inflateInit_(&strm, &ZLIB_VERSION[1], (int)sizeof(z_stream));
assert(ret == Z_VERSION_ERROR);
mem_done(&strm, "wrong version");
--
2.26.0
From 772ddd6500a74220e641782cc2ee892433197192 Mon Sep 17 00:00:00 2001
From: IBM developers
Date: Mon, 25 May 2020 14:09:48 +0200
From 608b71008c16ce6fbf2305145c5ffb69cd88ef59 Mon Sep 17 00:00:00 2001
From: Ondrej Dubaj <odubaj@redhat.com>
Date: Fri, 7 Aug 2020 07:12:50 +0200
Subject: [PATCH] Fix for Z hardware-accelerated deflate for s390x
architectures
---
configure | 7 +++
contrib/s390/dfltcc.c | 94 ++++++++++++++++++++---------------
contrib/s390/dfltcc_deflate.h | 10 ++--
deflate.c | 12 +++--
4 files changed, 76 insertions(+), 47 deletions(-)
configure | 7 +
contrib/s390/dfltcc.c | 244 +++++++++++++++++++++-------------
contrib/s390/dfltcc_deflate.h | 10 +-
deflate.c | 21 +--
4 files changed, 177 insertions(+), 105 deletions(-)
diff --git a/configure b/configure
index 66caece..bfe4386 100755
......@@ -37,10 +36,10 @@ index 66caece..bfe4386 100755
echo "unknown option: $1" | tee -a configure.log
echo "$0 --help for help" | tee -a configure.log
diff --git a/contrib/s390/dfltcc.c b/contrib/s390/dfltcc.c
index d187796..face8f1 100644
index d187796..d88a0d6 100644
--- a/contrib/s390/dfltcc.c
+++ b/contrib/s390/dfltcc.c
@@ -2,8 +2,8 @@
@@ -2,12 +2,13 @@
/*
Use the following commands to build zlib with DFLTCC support:
......@@ -51,7 +50,12 @@ index d187796..face8f1 100644
*/
#define _GNU_SOURCE
@@ -230,31 +230,28 @@ struct dfltcc_state {
#include <ctype.h>
+#include <errno.h>
#include <inttypes.h>
#include <stddef.h>
#include <stdio.h>
@@ -230,31 +231,28 @@ struct dfltcc_state {
/*
Compress.
*/
......@@ -97,7 +101,7 @@ index d187796..face8f1 100644
return 0;
/* Unsupported hardware */
@@ -266,6 +263,17 @@ int ZLIB_INTERNAL dfltcc_can_deflate(strm)
@@ -266,6 +264,17 @@ int ZLIB_INTERNAL dfltcc_can_deflate(strm)
return 1;
}
......@@ -115,7 +119,7 @@ index d187796..face8f1 100644
local void dfltcc_gdht OF((z_streamp strm));
local void dfltcc_gdht(strm)
z_streamp strm;
@@ -349,22 +357,24 @@ again:
@@ -349,22 +358,24 @@ again:
soft_bcc = 0;
no_flush = flush == Z_NO_FLUSH;
......@@ -152,7 +156,7 @@ index d187796..face8f1 100644
*result = need_more;
return 1;
}
@@ -418,7 +428,7 @@ again:
@@ -418,7 +429,7 @@ again:
param->cvt = state->wrap == 2 ? CVT_CRC32 : CVT_ADLER32;
if (!no_flush)
/* We need to close a block. Always do this in software - when there is
......@@ -161,7 +165,7 @@ index d187796..face8f1 100644
soft_bcc = 1;
if (flush == Z_FINISH && !param->bcf)
/* We are about to open a BFINAL block, set Block Header Final bit
@@ -433,8 +443,8 @@ again:
@@ -433,8 +444,8 @@ again:
param->sbb = (unsigned int)state->bi_valid;
if (param->sbb > 0)
*strm->next_out = (Bytef)state->bi_buf;
......@@ -172,7 +176,203 @@ index d187796..face8f1 100644
param->cv = state->wrap == 2 ? ZSWAP32(strm->adler) : strm->adler;
/* When opening a block, choose a Huffman-Table Type */
@@ -792,17 +802,20 @@ void ZLIB_INTERNAL dfltcc_free_window(strm, w)
@@ -642,27 +653,86 @@ int ZLIB_INTERNAL dfltcc_inflate_disable(strm)
return 0;
}
-/*
- Memory management.
- DFLTCC requires parameter blocks and window to be aligned. zlib allows
- users to specify their own allocation functions, so using e.g.
- `posix_memalign' is not an option. Thus, we overallocate and take the
- aligned portion of the buffer.
-*/
+local int env_dfltcc_disabled;
+local int env_source_date_epoch;
+local unsigned long env_level_mask;
+local unsigned long env_block_size;
+local unsigned long env_block_threshold;
+local unsigned long env_dht_threshold;
+local unsigned long env_ribm;
+local uint64_t cpu_facilities[(DFLTCC_FACILITY / 64) + 1];
+local struct dfltcc_qaf_param cpu_af __attribute__((aligned(8)));
+
local inline int is_dfltcc_enabled OF((void));
local inline int is_dfltcc_enabled(void)
+{
+ if (env_dfltcc_disabled)
+ /* User has explicitly disabled DFLTCC. */
+ return 0;
+
+ return is_bit_set((const char *)cpu_facilities, DFLTCC_FACILITY);
+}
+
+local unsigned long xstrtoul OF((const char *s, unsigned long _default));
+local unsigned long xstrtoul(s, _default)
+ const char *s;
+ unsigned long _default;
+{
+ char *endptr;
+ unsigned long result;
+
+ if (!(s && *s))
+ return _default;
+ errno = 0;
+ result = strtoul(s, &endptr, 0);
+ return (errno || *endptr) ? _default : result;
+}
+
+__attribute__((constructor)) local void init_globals OF((void));
+__attribute__((constructor)) local void init_globals(void)
{
const char *env;
- uint64_t facilities[(DFLTCC_FACILITY / 64) + 1];
register char r0 __asm__("r0");
env = secure_getenv("DFLTCC");
- if (env && !strcmp(env, "0"))
- /* User has explicitly disabled DFLTCC. */
- return 0;
+
+
+ env_dfltcc_disabled = env && !strcmp(env, "0");
+
+ env = secure_getenv("SOURCE_DATE_EPOCH");
+ env_source_date_epoch = !!env;
+
+#ifndef DFLTCC_LEVEL_MASK
+#define DFLTCC_LEVEL_MASK 0x2
+#endif
+ env_level_mask = xstrtoul(secure_getenv("DFLTCC_LEVEL_MASK"),
+ DFLTCC_LEVEL_MASK);
+
+#ifndef DFLTCC_BLOCK_SIZE
+#define DFLTCC_BLOCK_SIZE 1048576
+#endif
+ env_block_size = xstrtoul(secure_getenv("DFLTCC_BLOCK_SIZE"),
+ DFLTCC_BLOCK_SIZE);
- memset(facilities, 0, sizeof(facilities));
- r0 = sizeof(facilities) / sizeof(facilities[0]) - 1;
+#ifndef DFLTCC_FIRST_FHT_BLOCK_SIZE
+#define DFLTCC_FIRST_FHT_BLOCK_SIZE 4096
+#endif
+ env_block_threshold = xstrtoul(secure_getenv("DFLTCC_FIRST_FHT_BLOCK_SIZE"),
+ DFLTCC_FIRST_FHT_BLOCK_SIZE);
+
+#ifndef DFLTCC_DHT_MIN_SAMPLE_SIZE
+#define DFLTCC_DHT_MIN_SAMPLE_SIZE 4096
+#endif
+ env_dht_threshold = xstrtoul(secure_getenv("DFLTCC_DHT_MIN_SAMPLE_SIZE"),
+ DFLTCC_DHT_MIN_SAMPLE_SIZE);
+
+#ifndef DFLTCC_RIBM
+#define DFLTCC_RIBM 0
+#endif
+ env_ribm = xstrtoul(secure_getenv("DFLTCC_RIBM"), DFLTCC_RIBM);
+
+ memset(cpu_facilities, 0, sizeof(cpu_facilities));
+ r0 = sizeof(cpu_facilities) / sizeof(cpu_facilities[0]) - 1;
/* STFLE is supported since z9-109 and only in z/Architecture mode. When
* compiling with -m31, gcc defaults to ESA mode, however, since the kernel
* is 64-bit, it's always z/Architecture mode at runtime.
@@ -671,31 +741,35 @@ local inline int is_dfltcc_enabled(void)
".machinemode zarch\n"
"stfle %[facilities]\n"
".machinemode pop\n"
- : [facilities] "=Q" (facilities)
+ : [facilities] "=Q" (cpu_facilities)
, [r0] "+r" (r0)
:
: "cc");
- return is_bit_set((const char *)facilities, DFLTCC_FACILITY);
+ /* Initialize available functions */
+ if (is_dfltcc_enabled())
+ dfltcc(DFLTCC_QAF, &cpu_af, NULL, NULL, NULL, NULL, NULL);
+ else
+ memset(&cpu_af, 0, sizeof(cpu_af));
}
+/*
+ Memory management.
+
+ DFLTCC requires parameter blocks and window to be aligned. zlib allows
+ users to specify their own allocation functions, so using e.g.
+ `posix_memalign' is not an option. Thus, we overallocate and take the
+ aligned portion of the buffer.
+*/
void ZLIB_INTERNAL dfltcc_reset(strm, size)
z_streamp strm;
uInt size;
{
struct dfltcc_state *dfltcc_state =
(struct dfltcc_state *)((char FAR *)strm->state + ALIGN_UP(size, 8));
- struct dfltcc_qaf_param *param =
- (struct dfltcc_qaf_param *)&dfltcc_state->param;
- const char *s;
- /* Initialize available functions */
- if (is_dfltcc_enabled()) {
- dfltcc(DFLTCC_QAF, param, NULL, NULL, NULL, NULL, NULL);
- memmove(&dfltcc_state->af, param, sizeof(dfltcc_state->af));
- } else
- memset(&dfltcc_state->af, 0, sizeof(dfltcc_state->af));
+ memcpy(&dfltcc_state->af, &cpu_af, sizeof(dfltcc_state->af));
- if (secure_getenv("SOURCE_DATE_EPOCH"))
+ if (env_source_date_epoch)
/* User needs reproducible results, but the output of DFLTCC_CMPR
* depends on buffers' page offsets.
*/
@@ -706,36 +780,11 @@ void ZLIB_INTERNAL dfltcc_reset(strm, size)
dfltcc_state->param.nt = 1;
/* Initialize tuning parameters */
-#ifndef DFLTCC_LEVEL_MASK
-#define DFLTCC_LEVEL_MASK 0x2
-#endif
- s = secure_getenv("DFLTCC_LEVEL_MASK");
- dfltcc_state->level_mask = (s && *s) ? strtoul(s, NULL, 0) :
- DFLTCC_LEVEL_MASK;
-#ifndef DFLTCC_BLOCK_SIZE
-#define DFLTCC_BLOCK_SIZE 1048576
-#endif
- s = secure_getenv("DFLTCC_BLOCK_SIZE");
- dfltcc_state->block_size = (s && *s) ? strtoul(s, NULL, 0) :
- DFLTCC_BLOCK_SIZE;
-#ifndef DFLTCC_FIRST_FHT_BLOCK_SIZE
-#define DFLTCC_FIRST_FHT_BLOCK_SIZE 4096
-#endif
- s = secure_getenv("DFLTCC_FIRST_FHT_BLOCK_SIZE");
- dfltcc_state->block_threshold = (s && *s) ? strtoul(s, NULL, 0) :
- DFLTCC_FIRST_FHT_BLOCK_SIZE;
-#ifndef DFLTCC_DHT_MIN_SAMPLE_SIZE
-#define DFLTCC_DHT_MIN_SAMPLE_SIZE 4096
-#endif
- s = secure_getenv("DFLTCC_DHT_MIN_SAMPLE_SIZE");
- dfltcc_state->dht_threshold = (s && *s) ? strtoul(s, NULL, 0) :
- DFLTCC_DHT_MIN_SAMPLE_SIZE;
-#ifndef DFLTCC_RIBM
-#define DFLTCC_RIBM 0
-#endif
- s = secure_getenv("DFLTCC_RIBM");
- dfltcc_state->param.ribm = (s && *s) ? strtoul(s, NULL, 0) :
- DFLTCC_RIBM;
+ dfltcc_state->level_mask = env_level_mask;
+ dfltcc_state->block_size = env_block_size;
+ dfltcc_state->block_threshold = env_block_threshold;
+ dfltcc_state->dht_threshold = env_dht_threshold;
+ dfltcc_state->param.ribm = env_ribm;
}
voidpf ZLIB_INTERNAL dfltcc_alloc_state(strm, items, size)
@@ -787,22 +836,26 @@ void ZLIB_INTERNAL dfltcc_free_window(strm, w)
/*
Switching between hardware and software compression.
+
DFLTCC does not support all zlib settings, e.g. generation of non-compressed
blocks or alternative window sizes. When such settings are applied on the
fly with deflateParams, we need to convert between hardware and software
window formats.
*/
......@@ -196,7 +396,7 @@ index d187796..face8f1 100644
if (can_deflate == could_deflate)
/* We continue to work in the same mode - no changes needed */
@@ -812,8 +825,11 @@ int ZLIB_INTERNAL dfltcc_deflate_params(strm, level, strategy)
@@ -812,8 +865,11 @@ int ZLIB_INTERNAL dfltcc_deflate_params(strm, level, strategy)
/* DFLTCC was not used yet - no changes needed */
return Z_OK;
......@@ -211,7 +411,7 @@ index d187796..face8f1 100644
/*
diff --git a/contrib/s390/dfltcc_deflate.h b/contrib/s390/dfltcc_deflate.h
index a129a91..947b1e4 100644
index a129a91..de36784 100644
--- a/contrib/s390/dfltcc_deflate.h
+++ b/contrib/s390/dfltcc_deflate.h
@@ -9,7 +9,8 @@ int ZLIB_INTERNAL dfltcc_deflate OF((z_streamp strm,
......@@ -237,12 +437,12 @@ index a129a91..947b1e4 100644
+ err = dfltcc_deflate_params((strm), \
+ (level), \
+ (strategy), \
+ (hook_flush)); \
+ (hook_flush)); \
if (err == Z_STREAM_ERROR) \
return err; \
} while (0)
diff --git a/deflate.c b/deflate.c
index 9b09718..9284483 100644
index b17a7dd..a80bd3e 100644
--- a/deflate.c
+++ b/deflate.c
@@ -74,7 +74,7 @@ const char deflate_copyright[] =
......@@ -281,6 +481,36 @@ index 9b09718..9284483 100644
if (err == Z_STREAM_ERROR)
return err;
if (strm->avail_out == 0)
@@ -1065,7 +1067,6 @@ int ZEXPORT deflate (strm, flush)
}
if (flush != Z_FINISH) return Z_OK;
- if (s->wrap <= 0) return Z_STREAM_END;
/* Write the trailer */
#ifdef GZIP
@@ -1081,7 +1082,7 @@ int ZEXPORT deflate (strm, flush)
}
else
#endif
- {
+ if (s->wrap == 1) {
putShortMSB(s, (uInt)(strm->adler >> 16));
putShortMSB(s, (uInt)(strm->adler & 0xffff));
}
@@ -1090,7 +1091,11 @@ int ZEXPORT deflate (strm, flush)
* to flush the rest.
*/
if (s->wrap > 0) s->wrap = -s->wrap; /* write the trailer only once! */
- return s->pending != 0 ? Z_OK : Z_STREAM_END;
+ if (s->pending == 0) {
+ Assert(s->bi_valid == 0, "bi_buf not flushed");
+ return Z_STREAM_END;
+ }
+ return Z_OK;
}
/* ========================================================================= */
--
2.24.1
2.26.0
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
From d09bb1ab8ef9bb91457c0ead09589e8807489260 Mon Sep 17 00:00:00 2001
From: Ondrej Dubaj <odubaj@redhat.com>
Date: Thu, 6 Aug 2020 08:09:53 +0200
Subject: [PATCH] Permit a deflateParams() parameter change.
This change allows a parameter change even if the input data has
not all been compressed and copied to the application output