Limit binutils fuzzing input size

Limit all the binutils fuzzing inputs to 16384 bytes, and fuzz_as
to 1024 which is plenty large enough to wreak havok.  This will fix at
least some of the timeouts due to producing large amounts of output
from large files.

Author: amodra

projects/binutils/fuzz_addr2line.c

@@ -21,6 +21,8 @@ int LLVMFuzzerTestOneInput(const uint8_t *Data, size_t Size);
 int
 LLVMFuzzerTestOneInput(const uint8_t *data, size_t size)
 {
+  if (size > 16384)
+    return 0;
   char filename[256];
   sprintf(filename, "/tmp/libfuzzer.%d", getpid());
   FILE *fp = fopen(filename, "wb");

projects/binutils/fuzz_as.c

@@ -32,6 +32,8 @@ xatexit (void (*fn) (void) ATTRIBUTE_UNUSED)
 
 int LLVMFuzzerTestOneInput(const uint8_t *data, size_t size);
 int LLVMFuzzerTestOneInput(const uint8_t *data, size_t size) {
+  if (size > 1024)
+    return 0;
   char filename[256];
   sprintf(filename, "/tmp/libfuzzer-%d.s", getpid());
   FILE *fp = fopen(filename, "wb");

projects/binutils/fuzz_bfd.c

@@ -39,6 +39,8 @@ static int bufferToFile(char * name, const uint8_t *Data, size_t Size) {
 char *target = NULL;
 
 int LLVMFuzzerTestOneInput(const uint8_t *Data, size_t Size) {
+  if (Size > 16384)
+    return 0;
     char tmpfilename[32];
 
     if (bfd_init() != BFD_INIT_MAGIC)

projects/binutils/fuzz_bfd_ext.c

@@ -42,6 +42,8 @@ static int bufferToFile(char *name, const uint8_t *Data, size_t Size) {
 }
 
 int LLVMFuzzerTestOneInput(const uint8_t *Data, size_t Size) {
+  if (Size > 16384)
+    return 0;
   char tmpfilename[32];
 
   if (bfd_init() != BFD_INIT_MAGIC)

projects/binutils/fuzz_dlltool.c

@@ -60,9 +60,8 @@ int LLVMFuzzerTestOneInput(const uint8_t *Data, size_t Size);
 int
 LLVMFuzzerTestOneInput(const uint8_t *data, size_t size)
 {
-  if (size < 512) {
+  if (size < 512 || size > 16384)
     return 0;
-  }
 
   /* def file */
   char filename[256];

projects/binutils/fuzz_dwarf.c

@@ -20,6 +20,8 @@ int LLVMFuzzerTestOneInput(const uint8_t *Data, size_t Size);
 int
 LLVMFuzzerTestOneInput(const uint8_t *data, size_t size)
 {
+  if (size > 16384)
+    return 0;
   char filename[256];
   sprintf(filename, "/tmp/libfuzzer.%d", getpid());
   FILE *fp = fopen(filename, "wb");

projects/binutils/fuzz_nm.c

@@ -21,6 +21,8 @@ int LLVMFuzzerTestOneInput(const uint8_t *Data, size_t Size);
 int
 LLVMFuzzerTestOneInput(const uint8_t *data, size_t size)
 {
+  if (size > 16384)
+    return 0;
   char filename[256];
   sprintf(filename, "/tmp/libfuzzer.%d", getpid());
   FILE *fp = fopen(filename, "wb");

projects/binutils/fuzz_objcopy.c

@@ -94,6 +94,8 @@ init_objcopy_global_state() {
 int
 LLVMFuzzerTestOneInput(const uint8_t *data, size_t size)
 {
+  if (size > 16384)
+    return 0;
   char filename[256];
   sprintf(filename, "/tmp/libfuzzer.%d", getpid());
   FILE *fp = fopen(filename, "wb");

projects/binutils/fuzz_objdump.c

@@ -39,6 +39,8 @@ int LLVMFuzzerTestOneInput(const uint8_t *Data, size_t Size);
 int
 LLVMFuzzerTestOneInput(const uint8_t *data, size_t size)
 {
+  if (size > 16384)
+    return 0;
   char filename[256];
   sprintf(filename, "/tmp/libfuzzer.%d", getpid());
   FILE *fp = fopen(filename, "wb");

projects/binutils/fuzz_ranlib_simulation.c

@@ -31,6 +31,8 @@ int LLVMFuzzerTestOneInput(const uint8_t *Data, size_t Size);
 int
 LLVMFuzzerTestOneInput(const uint8_t *data, size_t size)
 {
+  if (size > 16384)
+    return 0;
   char filename[256];
   sprintf(filename, "/tmp/libfuzzer.%d", getpid());
   FILE *fp = fopen(filename, "wb");