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fix issue #783 (#862)

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* fix issue #783
This commit is contained in:
BellaXlp 2020-08-13 05:42:10 +08:00 committed by GitHub
parent f9f3fdfb1c
commit ab713923a2
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3 changed files with 61 additions and 4 deletions
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2
lib/lz4.c
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@ -1931,7 +1931,7 @@ LZ4_decompress_generic(
/* If we're in this block because of the input parsing condition, then we must be on the
* last sequence (or invalid), so we must check that we exactly consume the input.
*/
if ((ip+length>iend-(2+1+LASTLITERALS)) && (ip+length != iend)) { goto _output_error; }
if ((ip+length>iend-(2+1+LASTLITERALS)) && (ip+length != iend) && (cpy != oend)) { goto _output_error; }
assert(ip+length <= iend);
/* We are finishing in the middle of a literals segment.
* Break after the copy.

14
tests/Makefile
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@ -55,7 +55,7 @@ NB_LOOPS ?= -i1
default: all
all: fullbench fuzzer frametest roundTripTest datagen checkFrame
all: fullbench fuzzer frametest roundTripTest datagen checkFrame decompress-partial
all32: CFLAGS+=-m32
all32: all
@ -104,6 +104,9 @@ datagen : $(PRGDIR)/datagen.c datagencli.c
checkFrame : lz4frame.o lz4.o lz4hc.o xxhash.o checkFrame.c
$(CC) $(FLAGS) $^ -o $@$(EXT)
decompress-partial: lz4.o decompress-partial.c
$(CC) $(FLAGS) $^ -o $@$(EXT)
clean:
@$(MAKE) -C $(LZ4DIR) $@ > $(VOID)
@$(MAKE) -C $(PRGDIR) $@ > $(VOID)
@ -114,7 +117,8 @@ clean:
frametest$(EXT) frametest32$(EXT) \
fasttest$(EXT) roundTripTest$(EXT) \
datagen$(EXT) checkTag$(EXT) \
frameTest$(EXT) lz4_all.c
frameTest$(EXT) decompress-partial$(EXT) \
lz4_all.c
@$(RM) -rf $(TESTDIR)
@echo Cleaning completed
@ -156,7 +160,7 @@ list:
check: test-lz4-essentials
.PHONY: test
test: test-lz4 test-lz4c test-frametest test-fullbench test-fuzzer test-install test-amalgamation listTest
test: test-lz4 test-lz4c test-frametest test-fullbench test-fuzzer test-install test-amalgamation listTest test-decompress-partial
.PHONY: test32
test32: CFLAGS+=-m32
@ -519,4 +523,8 @@ test-mem: lz4 datagen fuzzer frametest fullbench
test-mem32: lz4c32 datagen
# unfortunately, valgrind doesn't seem to work with non-native binary...
test-decompress-partial : decompress-partial
@echo "\n ---- test decompress-partial ----"
./decompress-partial$(EXT)
endif

49
tests/decompress-partial.c Normal file
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@ -0,0 +1,49 @@
#include "stdio.h"
#include "string.h"
#include "lz4.h"
const char source[] =
"Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod\n"
"tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim\n"
"veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea\n"
"commodo consequat. Duis aute irure dolor in reprehenderit in voluptate\n"
"velit esse cillum dolore eu fugiat nulla pariatur. Excepteur sint occaecat\n"
"cupidatat non proident, sunt in culpa qui officia deserunt mollit anim id\n"
"est laborum.\n"
"\n"
"Sed ut perspiciatis unde omnis iste natus error sit voluptatem accusantium\n"
"doloremque laudantium, totam rem aperiam, eaque ipsa quae ab illo inventore\n"
"veritatis et quasi architecto beatae vitae dicta sunt explicabo. Nemo enim\n"
"ipsam voluptatem quia voluptas sit aspernatur aut odit aut fugit, sed quia\n"
"consequuntur magni dolores eos qui ratione voluptatem sequi nesciunt. Neque\n"
"porro quisquam est, qui dolorem ipsum quia dolor sit amet, consectetur,\n"
"adipisci velit, sed quia non numquam eius modi tempora incidunt ut labore\n"
"et dolore magnam aliquam quaerat voluptatem. Ut enim ad minima veniam, quis\n"
"nostrum exercitationem ullam corporis suscipit laboriosam, nisi ut aliquid\n"
"ex ea commodi consequatur? Quis autem vel eum iure reprehenderit qui in ea\n"
"voluptate velit esse quam nihil molestiae consequatur, vel illum qui\n"
"dolorem eum fugiat quo voluptas nulla pariatur?\n";
#define BUFFER_SIZE 2048
int main(void)
{
int srcLen = (int)strlen(source);
char cmpBuffer[BUFFER_SIZE];
char outBuffer[BUFFER_SIZE];
int cmpSize;
int i;
cmpSize = LZ4_compress_default(source, cmpBuffer, srcLen, BUFFER_SIZE);
for (i = cmpSize; i < cmpSize + 10; ++i) {
int result = LZ4_decompress_safe_partial(cmpBuffer, outBuffer, i, srcLen, BUFFER_SIZE);
if ((result < 0) || (result != srcLen) || memcmp(source, outBuffer, srcLen)) {
printf("test decompress-partial error \n");
return -1;
}
}
printf("test decompress-partial OK \n");
return 0;
}