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import libwebp-1.0.0-5.el8

This commit is contained in:
CentOS Sources 2021-06-02 16:11:20 +00:00 committed by Andrew Lukoshko
parent 41ac33e3c2
commit f1093ac54d
5 changed files with 338 additions and 1 deletions
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42
SOURCES/rhbz-1956853.patch Normal file
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@ -0,0 +1,42 @@
diff --git a/src/mux/muxread.c b/src/mux/muxread.c
index 0b55286..eb5070b 100644
--- a/src/mux/muxread.c
+++ b/src/mux/muxread.c
@@ -187,7 +187,7 @@
size = bitstream->size;
if (data == NULL) return NULL;
- if (size < RIFF_HEADER_SIZE) return NULL;
+ if (size < RIFF_HEADER_SIZE + CHUNK_HEADER_SIZE) return NULL;
if (GetLE32(data + 0) != MKFOURCC('R', 'I', 'F', 'F') ||
GetLE32(data + CHUNK_HEADER_SIZE) != MKFOURCC('W', 'E', 'B', 'P')) {
return NULL;
@@ -196,8 +196,6 @@
mux = WebPMuxNew();
if (mux == NULL) return NULL;
- if (size < RIFF_HEADER_SIZE + TAG_SIZE) goto Err;
-
tag = GetLE32(data + RIFF_HEADER_SIZE);
if (tag != kChunks[IDX_VP8].tag &&
tag != kChunks[IDX_VP8L].tag &&
@@ -206,12 +204,11 @@
}
riff_size = SizeWithPadding(GetLE32(data + TAG_SIZE));
- if (riff_size > MAX_CHUNK_PAYLOAD || riff_size > size) {
- goto Err;
- } else {
- if (riff_size < size) { // Redundant data after last chunk.
- size = riff_size; // To make sure we don't read any data beyond mux_size.
- }
+ if (riff_size < CHUNK_HEADER_SIZE) goto Err;
+ if (riff_size > MAX_CHUNK_PAYLOAD || riff_size > size) goto Err;
+ // There's no point in reading past the end of the RIFF chunk.
+ if (size > riff_size + CHUNK_HEADER_SIZE) {
+ size = riff_size + CHUNK_HEADER_SIZE;
}
end = data + size;

61
SOURCES/rhbz-1956856.patch Normal file
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@ -0,0 +1,61 @@
diff --git a/src/mux/muxi.h b/src/mux/muxi.h
index 6b57eea..14fd6e2 100644
--- a/src/mux/muxi.h
+++ b/src/mux/muxi.h
@@ -14,6 +14,7 @@
#ifndef WEBP_MUX_MUXI_H_
#define WEBP_MUX_MUXI_H_
+#include <assert.h>
#include <stdlib.h>
#include "src/dec/vp8i_dec.h"
#include "src/dec/vp8li_dec.h"
@@ -143,13 +144,13 @@
// Returns size of the chunk including chunk header and padding byte (if any).
static WEBP_INLINE size_t SizeWithPadding(size_t chunk_size) {
+ assert(chunk_size <= MAX_CHUNK_PAYLOAD);
return CHUNK_HEADER_SIZE + ((chunk_size + 1) & ~1U);
}
// Size of a chunk including header and padding.
static WEBP_INLINE size_t ChunkDiskSize(const WebPChunk* chunk) {
const size_t data_size = chunk->data_.size;
- assert(data_size < MAX_CHUNK_PAYLOAD);
return SizeWithPadding(data_size);
}
diff --git a/src/mux/muxread.c b/src/mux/muxread.c
index eb5070b..ef50dae 100644
--- a/src/mux/muxread.c
+++ b/src/mux/muxread.c
@@ -59,6 +59,7 @@
// Sanity checks.
if (data_size < CHUNK_HEADER_SIZE) return WEBP_MUX_NOT_ENOUGH_DATA;
chunk_size = GetLE32(data + TAG_SIZE);
+ if (chunk_size > MAX_CHUNK_PAYLOAD) return WEBP_MUX_BAD_DATA;
{
const size_t chunk_disk_size = SizeWithPadding(chunk_size);
@@ -203,9 +204,14 @@
goto Err; // First chunk should be VP8, VP8L or VP8X.
}
- riff_size = SizeWithPadding(GetLE32(data + TAG_SIZE));
+ riff_size = GetLE32(data + TAG_SIZE);
+ if (riff_size > MAX_CHUNK_PAYLOAD) goto Err;
+
+ // Note this padding is historical and differs from demux.c which does not
+ // pad the file size.
+ riff_size = SizeWithPadding(riff_size);
if (riff_size < CHUNK_HEADER_SIZE) goto Err;
- if (riff_size > MAX_CHUNK_PAYLOAD || riff_size > size) goto Err;
+ if (riff_size > size) goto Err;
// There's no point in reading past the end of the RIFF chunk.
if (size > riff_size + CHUNK_HEADER_SIZE) {
size = riff_size + CHUNK_HEADER_SIZE;

213
SOURCES/rhbz-1956868.patch Normal file
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@ -0,0 +1,213 @@
diff -up libwebp-1.0.0/src/dec/vp8l_dec.c.old libwebp-1.0.0/src/dec/vp8l_dec.c
--- libwebp-1.0.0/src/dec/vp8l_dec.c.old 2018-04-21 05:04:55.000000000 +0200
+++ libwebp-1.0.0/src/dec/vp8l_dec.c 2018-11-09 00:29:51.000000000 +0100
@@ -362,12 +362,19 @@ static int ReadHuffmanCodes(VP8LDecoder*
VP8LMetadata* const hdr = &dec->hdr_;
uint32_t* huffman_image = NULL;
HTreeGroup* htree_groups = NULL;
+ // When reading htrees, some might be unused, as the format allows it.
+ // We will still read them but put them in this htree_group_bogus.
+ HTreeGroup htree_group_bogus;
HuffmanCode* huffman_tables = NULL;
+ HuffmanCode* huffman_tables_bogus = NULL;
HuffmanCode* next = NULL;
int num_htree_groups = 1;
+ int num_htree_groups_max = 1;
int max_alphabet_size = 0;
int* code_lengths = NULL;
const int table_size = kTableSize[color_cache_bits];
+ int* mapping = NULL;
+ int ok = 0;
if (allow_recursion && VP8LReadBits(br, 1)) {
// use meta Huffman codes.
@@ -384,10 +391,42 @@ static int ReadHuffmanCodes(VP8LDecoder*
// The huffman data is stored in red and green bytes.
const int group = (huffman_image[i] >> 8) & 0xffff;
huffman_image[i] = group;
- if (group >= num_htree_groups) {
- num_htree_groups = group + 1;
+ if (group >= num_htree_groups_max) {
+ num_htree_groups_max = group + 1;
}
}
+ // Check the validity of num_htree_groups_max. If it seems too big, use a
+ // smaller value for later. This will prevent big memory allocations to end
+ // up with a bad bitstream anyway.
+ // The value of 1000 is totally arbitrary. We know that num_htree_groups_max
+ // is smaller than (1 << 16) and should be smaller than the number of pixels
+ // (though the format allows it to be bigger).
+ if (num_htree_groups_max > 1000 || num_htree_groups_max > xsize * ysize) {
+ // Create a mapping from the used indices to the minimal set of used
+ // values [0, num_htree_groups)
+ mapping = (int*)WebPSafeMalloc(num_htree_groups_max, sizeof(*mapping));
+ if (mapping == NULL) {
+ dec->status_ = VP8_STATUS_OUT_OF_MEMORY;
+ goto Error;
+ }
+ // -1 means a value is unmapped, and therefore unused in the Huffman
+ // image.
+ memset(mapping, 0xff, num_htree_groups_max * sizeof(*mapping));
+ for (num_htree_groups = 0, i = 0; i < huffman_pixs; ++i) {
+ // Get the current mapping for the group and remap the Huffman image.
+ int* const mapped_group = &mapping[huffman_image[i]];
+ if (*mapped_group == -1) *mapped_group = num_htree_groups++;
+ huffman_image[i] = *mapped_group;
+ }
+ huffman_tables_bogus = (HuffmanCode*)WebPSafeMalloc(
+ table_size, sizeof(*huffman_tables_bogus));
+ if (huffman_tables_bogus == NULL) {
+ dec->status_ = VP8_STATUS_OUT_OF_MEMORY;
+ goto Error;
+ }
+ } else {
+ num_htree_groups = num_htree_groups_max;
+ }
}
if (br->eos_) goto Error;
@@ -403,11 +442,11 @@ static int ReadHuffmanCodes(VP8LDecoder*
}
}
+ code_lengths = (int*)WebPSafeCalloc((uint64_t)max_alphabet_size,
+ sizeof(*code_lengths));
huffman_tables = (HuffmanCode*)WebPSafeMalloc(num_htree_groups * table_size,
sizeof(*huffman_tables));
htree_groups = VP8LHtreeGroupsNew(num_htree_groups);
- code_lengths = (int*)WebPSafeCalloc((uint64_t)max_alphabet_size,
- sizeof(*code_lengths));
if (htree_groups == NULL || code_lengths == NULL || huffman_tables == NULL) {
dec->status_ = VP8_STATUS_OUT_OF_MEMORY;
@@ -415,28 +454,35 @@ static int ReadHuffmanCodes(VP8LDecoder*
}
next = huffman_tables;
- for (i = 0; i < num_htree_groups; ++i) {
- HTreeGroup* const htree_group = &htree_groups[i];
+ for (i = 0; i < num_htree_groups_max; ++i) {
+ // If the index "i" is unused in the Huffman image, read the coefficients
+ // but store them to a bogus htree_group.
+ const int is_bogus = (mapping != NULL && mapping[i] == -1);
+ HTreeGroup* const htree_group =
+ is_bogus ? &htree_group_bogus :
+ &htree_groups[(mapping == NULL) ? i : mapping[i]];
HuffmanCode** const htrees = htree_group->htrees;
+ HuffmanCode* huffman_tables_i = is_bogus ? huffman_tables_bogus : next;
int size;
int total_size = 0;
int is_trivial_literal = 1;
int max_bits = 0;
for (j = 0; j < HUFFMAN_CODES_PER_META_CODE; ++j) {
int alphabet_size = kAlphabetSize[j];
- htrees[j] = next;
+ htrees[j] = huffman_tables_i;
if (j == 0 && color_cache_bits > 0) {
alphabet_size += 1 << color_cache_bits;
}
- size = ReadHuffmanCode(alphabet_size, dec, code_lengths, next);
+ size =
+ ReadHuffmanCode(alphabet_size, dec, code_lengths, huffman_tables_i);
if (size == 0) {
goto Error;
}
if (is_trivial_literal && kLiteralMap[j] == 1) {
- is_trivial_literal = (next->bits == 0);
+ is_trivial_literal = (huffman_tables_i->bits == 0);
}
- total_size += next->bits;
- next += size;
+ total_size += huffman_tables_i->bits;
+ huffman_tables_i += size;
if (j <= ALPHA) {
int local_max_bits = code_lengths[0];
int k;
@@ -448,38 +494,41 @@ static int ReadHuffmanCodes(VP8LDecoder*
max_bits += local_max_bits;
}
}
+ if (!is_bogus) next = huffman_tables_i;
htree_group->is_trivial_literal = is_trivial_literal;
htree_group->is_trivial_code = 0;
if (is_trivial_literal) {
const int red = htrees[RED][0].value;
const int blue = htrees[BLUE][0].value;
const int alpha = htrees[ALPHA][0].value;
- htree_group->literal_arb =
- ((uint32_t)alpha << 24) | (red << 16) | blue;
+ htree_group->literal_arb = ((uint32_t)alpha << 24) | (red << 16) | blue;
if (total_size == 0 && htrees[GREEN][0].value < NUM_LITERAL_CODES) {
htree_group->is_trivial_code = 1;
htree_group->literal_arb |= htrees[GREEN][0].value << 8;
}
}
- htree_group->use_packed_table = !htree_group->is_trivial_code &&
- (max_bits < HUFFMAN_PACKED_BITS);
+ htree_group->use_packed_table =
+ !htree_group->is_trivial_code && (max_bits < HUFFMAN_PACKED_BITS);
if (htree_group->use_packed_table) BuildPackedTable(htree_group);
}
- WebPSafeFree(code_lengths);
+ ok = 1;
- // All OK. Finalize pointers and return.
+ // All OK. Finalize pointers.
hdr->huffman_image_ = huffman_image;
hdr->num_htree_groups_ = num_htree_groups;
hdr->htree_groups_ = htree_groups;
hdr->huffman_tables_ = huffman_tables;
- return 1;
Error:
WebPSafeFree(code_lengths);
- WebPSafeFree(huffman_image);
- WebPSafeFree(huffman_tables);
- VP8LHtreeGroupsFree(htree_groups);
- return 0;
+ WebPSafeFree(huffman_tables_bogus);
+ WebPSafeFree(mapping);
+ if (!ok) {
+ WebPSafeFree(huffman_image);
+ WebPSafeFree(huffman_tables);
+ VP8LHtreeGroupsFree(htree_groups);
+ }
+ return ok;
}
//------------------------------------------------------------------------------
@@ -884,7 +933,11 @@ static WEBP_INLINE void CopyBlock8b(uint
#endif
break;
case 2:
+#if !defined(WORDS_BIGENDIAN)
memcpy(&pattern, src, sizeof(uint16_t));
+#else
+ pattern = ((uint32_t)src[0] << 8) | src[1];
+#endif
#if defined(__arm__) || defined(_M_ARM)
pattern |= pattern << 16;
#elif defined(WEBP_USE_MIPS_DSP_R2)
@@ -1523,7 +1576,6 @@ int VP8LDecodeAlphaHeader(ALPHDecoder* c
if (dec == NULL) return 0;
assert(alph_dec != NULL);
- alph_dec->vp8l_dec_ = dec;
dec->width_ = alph_dec->width_;
dec->height_ = alph_dec->height_;
@@ -1555,11 +1607,12 @@ int VP8LDecodeAlphaHeader(ALPHDecoder* c
if (!ok) goto Err;
+ // Only set here, once we are sure it is valid (to avoid thread races).
+ alph_dec->vp8l_dec_ = dec;
return 1;
Err:
- VP8LDelete(alph_dec->vp8l_dec_);
- alph_dec->vp8l_dec_ = NULL;
+ VP8LDelete(dec);
return 0;
}

14
SOURCES/rhbz-1956917.patch Normal file
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@ -0,0 +1,14 @@
diff --git a/src/mux/muxread.c b/src/mux/muxread.c
index fbe9f05..ea07dbf 100644
--- a/src/mux/muxread.c
+++ b/src/mux/muxread.c
@@ -264,6 +264,7 @@
chunk_list = MuxGetChunkListFromId(mux, id); // List to add this chunk.
if (ChunkSetNth(&chunk, chunk_list, 0) != WEBP_MUX_OK) goto Err;
if (id == WEBP_CHUNK_VP8X) { // grab global specs
+ if (data_size < CHUNK_HEADER_SIZE + VP8X_CHUNK_SIZE) goto Err;
mux->canvas_width_ = GetLE24(data + 12) + 1;
mux->canvas_height_ = GetLE24(data + 15) + 1;
}

9
SPECS/libwebp.spec
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@ -2,7 +2,7 @@
Name: libwebp
Version: 1.0.0
Release: 3%{?dist}
Release: 5%{?dist}
URL: http://webmproject.org/
Summary: Library and tools for the WebP graphics format
# Additional IPR is licensed as well. See PATENTS file for details
@ -12,6 +12,10 @@ Source1: libwebp_jni_example.java
Patch0: rhbz-1956829.patch
Patch1: rhbz-1956843.patch
Patch2: rhbz-1956919.patch
Patch3: rhbz-1956853.patch
Patch4: rhbz-1956856.patch
Patch5: rhbz-1956917.patch
Patch6: rhbz-1956868.patch
BuildRequires: libjpeg-devel
BuildRequires: libpng-devel
@ -143,6 +147,9 @@ cp swig/*.jar swig/*.so %{buildroot}/%{_libdir}/%{name}-java/
%changelog
* Thu May 27 2021 Martin Stransky <stransky@redhat.com> - 1.0.0-5
- Added fixes for rhbz#1956853, rhbz#1956856, rhbz#1956868, rhbz#1956917
* Mon May 17 2021 Martin Stransky <stransky@redhat.com> - 1.0.0-3
- Added fixes for rhbz#1956829, rhbz#1956843, rhbz#1956919