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Merge pull request #737 from aaaaaa123456789/master

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Fix an uninitialized read bug in lzcomp
This commit is contained in:
Rangi 2020-06-28 04:26:51 -04:00 committed by GitHub
commit a0e8e5ac5b
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GPG Key ID: 4AEE18F83AFDEB23
4 changed files with 19 additions and 5 deletions
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6
gfx/lz.mk
View File

@ -34,7 +34,12 @@ gfx/pokegear/pokegear.2bpp.lz: LZFLAGS = --compressor null --method 1 --align 1
gfx/pokegear/pokegear_sprites.2bpp.lz: LZFLAGS += --align 4
gfx/pokegear/town_map.2bpp.lz: LZFLAGS = --compressor null --method 1 --align 1
gfx/pokemon/corsola/front.animated.2bpp.lz: LZFLAGS += --method 4
gfx/pokemon/hitmontop/back.2bpp.lz: LZFLAGS += --method 4
gfx/pokemon/nidoran_f/front.animated.2bpp.lz: LZFLAGS += --method 4
gfx/pokemon/primeape/front.animated.2bpp.lz: LZFLAGS += --method 4
gfx/pokemon/scyther/front.animated.2bpp.lz: LZFLAGS += --method 4
gfx/pokemon/unown_g/front.animated.2bpp.lz: LZFLAGS += --method 4
gfx/pokemon/voltorb/front.animated.2bpp.lz: LZFLAGS += --method 4
gfx/sgb/gbc_only.2bpp.lz: LZFLAGS = --compressor null --method 1 --align 1
@ -56,6 +61,7 @@ gfx/tilesets/kanto.2bpp.lz: LZFLAGS = --compressor null --method 1 --align 1
gfx/tilesets/mansion.2bpp.lz: LZFLAGS += --method 2 --align 4
gfx/tilesets/mart.2bpp.lz: LZFLAGS += --method 2 --align 4
gfx/tilesets/omanyte_word_room.2bpp.lz: LZFLAGS = --compressor null --method 1 --align 1
gfx/tilesets/players_room.2bpp.lz: LZFLAGS += --method 4 --align 4
gfx/tilesets/ruins_of_alph.2bpp.lz: LZFLAGS = --compressor null --method 1 --align 1
gfx/tilesets/tower.2bpp.lz: LZFLAGS += --method 2 --align 4

2
tools/lz/mpcomp.c
View File

@ -101,7 +101,7 @@ struct command pick_copy_for_pass (const unsigned char * data, const unsigned ch
current = buffer + refpos - (length - 3);
else
current = reference + refpos;
if (memcmp(data + position, current, 4)) continue;
if (memcmp(data + position, current, ((position + 4) > length) ? length - position : 4)) continue;
for (count = 4; (count < (length - position)) && (count < (length - refpos)); count ++) if (data[position + count] != current[count]) break;
if (count > (length - refpos)) count = length - refpos;
if (count > (length - position)) count = length - position;

12
tools/lz/output.c
View File

@ -28,8 +28,16 @@ void write_commands_and_padding_to_textfile (const char * file, const struct com
if (fputs("\tlzend\n", fp) < 0) error_exit(1, "could not write terminator to compressed output");
if (padding_size) {
input_stream += padding_offset;
int rv = fprintf(fp, "\tdb $%02hhx", *(input_stream ++));
while ((rv >= 0) && (-- padding_size)) rv = fprintf(fp, ", $%02hhx", *(input_stream ++));
int rv = 0;
unsigned pos;
const char * prefix = "\tdb";
for (pos = 0; (rv >= 0) && (pos < padding_size); pos ++) {
if (input_stream[pos])
rv = fprintf(fp, "%s $%02hhx", prefix, input_stream[pos]);
else
rv = fprintf(fp, "%s 0", prefix);
prefix = ",";
}
if (rv >= 0) rv = -(putc('\n', fp) == EOF);
if (rv < 0) error_exit(1, "could not write padding to compressed output");
}

4
tools/lz/uncomp.c
View File

@ -49,7 +49,7 @@ struct command * get_commands_from_file (const unsigned char * data, unsigned sh
}
if (slack) *slack = *size - (rp - data);
*size = current - result;
return realloc(result, *size * sizeof(struct command));
return realloc(result, (*size ? *size : 1) * sizeof(struct command));
error:
free(result);
return NULL;
@ -88,5 +88,5 @@ unsigned char * get_uncompressed_data (const struct command * commands, const un
}
}
*size = current - result;
return result;
return realloc(result, *size ? *size : 1);
}