Flawfinder version 2.0.10, (C) 2001-2019 David A. Wheeler.
Number of rules (primarily dangerous function names) in C/C++ ruleset: 223
Examining data/bcache-tools-1.0.8/bcache-register.c
Examining data/bcache-tools-1.0.8/bcache-super-show.c
Examining data/bcache-tools-1.0.8/bcache-test.c
Examining data/bcache-tools-1.0.8/bcache.h
Examining data/bcache-tools-1.0.8/make-bcache.c
Examining data/bcache-tools-1.0.8/probe-bcache.c
Examining data/bcache-tools-1.0.8/bcache.c

FINAL RESULTS:

data/bcache-tools-1.0.8/bcache-super-show.c:107:2:  [4] (format) printf:
  If format strings can be influenced by an attacker, they can be exploited
  (CWE-134). Use a constant for the format specification.
	printf("sb.first_sector\t\t%" PRIu64, sb.offset);
data/bcache-tools-1.0.8/bcache-super-show.c:116:2:  [4] (format) printf:
  If format strings can be influenced by an attacker, they can be exploited
  (CWE-134). Use a constant for the format specification.
	printf("sb.csum\t\t\t%" PRIX64, sb.csum);
data/bcache-tools-1.0.8/bcache-super-show.c:128:2:  [4] (format) printf:
  If format strings can be influenced by an attacker, they can be exploited
  (CWE-134). Use a constant for the format specification.
	printf("sb.version\t\t%" PRIu64, sb.version);
data/bcache-tools-1.0.8/bcache-super-show.c:68:14:  [3] (buffer) getopt:
  Some older implementations do not protect against internal buffer overflows
  (CWE-120, CWE-20). Check implementation on installation, or limit the size
  of all string inputs.
	while ((o = getopt(argc, argv, "f")) != EOF)
data/bcache-tools-1.0.8/bcache-test.c:73:7:  [3] (random) random:
  This function is not sufficiently random for security-related functions
  such as key and nonce creation (CWE-327). Use a more secure technique for
  acquiring random values.
		x = random() / (double) (RAND_MAX / 2) - 1;
data/bcache-tools-1.0.8/bcache-test.c:74:7:  [3] (random) random:
  This function is not sufficiently random for security-related functions
  such as key and nonce creation (CWE-327). Use a more secure technique for
  acquiring random values.
		y = random() / (double) (RAND_MAX / 2) - 1;
data/bcache-tools-1.0.8/bcache-test.c:120:33:  [3] (random) random:
  This function is not sufficiently random for security-related functions
  such as key and nonce creation (CWE-327). Use a more secure technique for
  acquiring random values.
		sprintf(logbuf, "log.%i", abs(random()) % 1000);
data/bcache-tools-1.0.8/bcache-test.c:170:14:  [3] (buffer) getopt:
  Some older implementations do not protect against internal buffer overflows
  (CWE-120, CWE-20). Check implementation on installation, or limit the size
  of all string inputs.
	while ((o = getopt(argc, argv, "dnwvscwlb:")) != EOF)
data/bcache-tools-1.0.8/bcache-test.c:245:23:  [3] (random) drand48:
  This function is not sufficiently random for security-related functions
  such as key and nonce creation (CWE-327). Use a more secure technique for
  acquiring random values.
		nbytes = randsize ? drand48() * 16 + 1 : 1;
data/bcache-tools-1.0.8/bcache-test.c:249:36:  [3] (random) random:
  This function is not sufficiently random for security-related functions
  such as key and nonce creation (CWE-327). Use a more secure technique for
  acquiring random values.
		offset += walk ? normal() * 20 : random();
data/bcache-tools-1.0.8/make-bcache.c:370:14:  [3] (buffer) getopt_long:
  Some older implementations do not protect against internal buffer overflows
  (CWE-120, CWE-20). Check implementation on installation, or limit the size
  of all string inputs.
	while ((c = getopt_long(argc, argv,
data/bcache-tools-1.0.8/probe-bcache.c:36:14:  [3] (buffer) getopt:
  Some older implementations do not protect against internal buffer overflows
  (CWE-120, CWE-20). Check implementation on installation, or limit the size
  of all string inputs.
	while ((o = getopt(argc, argv, "o:")) != EOF)
data/bcache-tools-1.0.8/bcache-register.c:21:10:  [2] (misc) open:
  Check when opening files - can an attacker redirect it (via symlinks),
  force the opening of special file type (e.g., device files), move things
  around to create a race condition, control its ancestors, or change its
  contents? (CWE-362).
    fd = open("/sys/fs/bcache/register", O_WRONLY);
data/bcache-tools-1.0.8/bcache-super-show.c:65:2:  [2] (buffer) char:
  Statically-sized arrays can be improperly restricted, leading to potential
  overflows or other issues (CWE-119!/CWE-120). Perform bounds checking, use
  functions that limit length, or ensure that the size is larger than the
  maximum possible length.
	char uuid[40];
data/bcache-tools-1.0.8/bcache-super-show.c:87:11:  [2] (misc) open:
  Check when opening files - can an attacker redirect it (via symlinks),
  force the opening of special file type (e.g., device files), move things
  around to create a race condition, control its ancestors, or change its
  contents? (CWE-362).
	int fd = open(argv[0], O_RDONLY);
data/bcache-tools-1.0.8/bcache-super-show.c:150:2:  [2] (buffer) char:
  Statically-sized arrays can be improperly restricted, leading to potential
  overflows or other issues (CWE-119!/CWE-120). Perform bounds checking, use
  functions that limit length, or ensure that the size is larger than the
  maximum possible length.
	char label[SB_LABEL_SIZE + 1];
data/bcache-tools-1.0.8/bcache-test.c:35:10:  [2] (buffer) char:
  Statically-sized arrays can be improperly restricted, leading to potential
  overflows or other issues (CWE-119!/CWE-120). Perform bounds checking, use
  functions that limit length, or ensure that the size is larger than the
  maximum possible length.
unsigned char zero[4096];
data/bcache-tools-1.0.8/bcache-test.c:102:11:  [2] (buffer) char:
  Statically-sized arrays can be improperly restricted, leading to potential
  overflows or other issues (CWE-119!/CWE-120). Perform bounds checking, use
  functions that limit length, or ensure that the size is larger than the
  maximum possible length.
	unsigned char csum[16];
data/bcache-tools-1.0.8/bcache-test.c:103:11:  [2] (buffer) char:
  Statically-sized arrays can be improperly restricted, leading to potential
  overflows or other issues (CWE-119!/CWE-120). Perform bounds checking, use
  functions that limit length, or ensure that the size is larger than the
  maximum possible length.
	unsigned char oldcsum[16];
data/bcache-tools-1.0.8/bcache-test.c:110:2:  [2] (buffer) char:
  Statically-sized arrays can be improperly restricted, leading to potential
  overflows or other issues (CWE-119!/CWE-120). Perform bounds checking, use
  functions that limit length, or ensure that the size is larger than the
  maximum possible length.
	char logbuf[1 << 21];
data/bcache-tools-1.0.8/bcache-test.c:120:3:  [2] (buffer) sprintf:
  Does not check for buffer overflows (CWE-120). Use sprintf_s, snprintf, or
  vsnprintf. Risk is low because the source has a constant maximum length.
		sprintf(logbuf, "log.%i", abs(random()) % 1000);
data/bcache-tools-1.0.8/bcache-test.c:121:8:  [2] (misc) open:
  Check when opening files - can an attacker redirect it (via symlinks),
  force the opening of special file type (e.g., device files), move things
  around to create a race condition, control its ancestors, or change its
  contents? (CWE-362).
		fd = open(logbuf, O_WRONLY|O_CREAT|O_TRUNC, 0644);
data/bcache-tools-1.0.8/bcache-test.c:163:11:  [2] (buffer) char:
  Statically-sized arrays can be improperly restricted, leading to potential
  overflows or other issues (CWE-119!/CWE-120). Perform bounds checking, use
  functions that limit length, or ensure that the size is larger than the
  maximum possible length.
	unsigned char c[16];
data/bcache-tools-1.0.8/bcache-test.c:197:16:  [2] (integer) atol:
  Unless checked, the resulting number can exceed the expected range
  (CWE-190). If source untrusted, check both minimum and maximum, even if the
  input had no minus sign (large numbers can roll over into negative number;
  consider saving to an unsigned value if that is intended).
			benchmark = atol(optarg);
data/bcache-tools-1.0.8/bcache-test.c:219:8:  [2] (misc) open:
  Check when opening files - can an attacker redirect it (via symlinks),
  force the opening of special file type (e.g., device files), move things
  around to create a race condition, control its ancestors, or change its
  contents? (CWE-362).
	fd1 = open(argv[0], (wtest ? O_RDWR : O_RDONLY)|direct);
data/bcache-tools-1.0.8/bcache-test.c:221:9:  [2] (misc) open:
  Check when opening files - can an attacker redirect it (via symlinks),
  force the opening of special file type (e.g., device files), move things
  around to create a race condition, control its ancestors, or change its
  contents? (CWE-362).
		fd2 = open(argv[1], (wtest ? O_RDWR : O_RDONLY)|direct);
data/bcache-tools-1.0.8/bcache-test.c:284:6:  [2] (buffer) memcpy:
  Does not check for buffer overflows when copying to destination (CWE-120).
  Make sure destination can always hold the source data.
					memcpy(&p->oldcsum[0], &p->csum[0], 16);
data/bcache-tools-1.0.8/bcache-test.c:285:6:  [2] (buffer) memcpy:
  Does not check for buffer overflows when copying to destination (CWE-120).
  Make sure destination can always hold the source data.
					memcpy(&p->csum[0], c, 16);
data/bcache-tools-1.0.8/make-bcache.c:177:2:  [2] (buffer) char:
  Statically-sized arrays can be improperly restricted, leading to potential
  overflows or other issues (CWE-119!/CWE-120). Perform bounds checking, use
  functions that limit length, or ensure that the size is larger than the
  maximum possible length.
	char uuid_str[40], set_uuid_str[40], zeroes[SB_START] = {0};
data/bcache-tools-1.0.8/make-bcache.c:181:12:  [2] (misc) open:
  Check when opening files - can an attacker redirect it (via symlinks),
  force the opening of special file type (e.g., device files), move things
  around to create a race condition, control its ancestors, or change its
  contents? (CWE-362).
	if ((fd = open(dev, O_RDWR|O_EXCL)) == -1) {
data/bcache-tools-1.0.8/make-bcache.c:216:2:  [2] (buffer) memcpy:
  Does not check for buffer overflows when copying to destination (CWE-120).
  Make sure destination can always hold the source data.
	memcpy(sb.magic, bcache_magic, 16);
data/bcache-tools-1.0.8/make-bcache.c:318:12:  [2] (misc) open:
  Check when opening files - can an attacker redirect it (via symlinks),
  force the opening of special file type (e.g., device files), move things
  around to create a race condition, control its ancestors, or change its
  contents? (CWE-362).
		int fd = open(path, O_RDONLY);
data/bcache-tools-1.0.8/make-bcache.c:342:2:  [2] (buffer) char:
  Statically-sized arrays can be improperly restricted, leading to potential
  overflows or other issues (CWE-119!/CWE-120). Perform bounds checking, use
  functions that limit length, or ensure that the size is larger than the
  maximum possible length.
	char *cache_devices[argc];
data/bcache-tools-1.0.8/make-bcache.c:343:2:  [2] (buffer) char:
  Statically-sized arrays can be improperly restricted, leading to potential
  overflows or other issues (CWE-119!/CWE-120). Perform bounds checking, use
  functions that limit length, or ensure that the size is larger than the
  maximum possible length.
	char *backing_devices[argc];
data/bcache-tools-1.0.8/probe-bcache.c:33:2:  [2] (buffer) char:
  Statically-sized arrays can be improperly restricted, leading to potential
  overflows or other issues (CWE-119!/CWE-120). Perform bounds checking, use
  functions that limit length, or ensure that the size is larger than the
  maximum possible length.
	char uuid[40];
data/bcache-tools-1.0.8/probe-bcache.c:52:12:  [2] (misc) open:
  Check when opening files - can an attacker redirect it (via symlinks),
  force the opening of special file type (e.g., device files), move things
  around to create a race condition, control its ancestors, or change its
  contents? (CWE-362).
		int fd = open(argv[i], O_RDONLY);
data/bcache-tools-1.0.8/bcache-super-show.c:151:2:  [1] (buffer) strncpy:
  Easily used incorrectly; doesn't always \0-terminate or check for invalid
  pointers [MS-banned] (CWE-120).
	strncpy(label, (char*)sb.label, SB_LABEL_SIZE);
data/bcache-tools-1.0.8/make-bcache.c:112:9:  [1] (buffer) strlen:
  Does not handle strings that are not \0-terminated; if given one it may
  perform an over-read (it could cause a crash if unprotected) (CWE-126).
	size = strlen(s);

ANALYSIS SUMMARY:

Hits = 38
Lines analyzed = 1417 in approximately 0.05 seconds (29164 lines/second)
Physical Source Lines of Code (SLOC) = 1127
Hits@level = [0]  70 [1]   2 [2]  24 [3]   9 [4]   3 [5]   0
Hits@level+ = [0+] 108 [1+]  38 [2+]  36 [3+]  12 [4+]   3 [5+]   0
Hits/KSLOC@level+ = [0+] 95.8296 [1+] 33.7178 [2+] 31.9432 [3+] 10.6477 [4+] 2.66193 [5+]   0
Dot directories skipped = 1 (--followdotdir overrides)
Minimum risk level = 1
Not every hit is necessarily a security vulnerability.
There may be other security vulnerabilities; review your code!
See 'Secure Programming HOWTO'
(https://dwheeler.com/secure-programs) for more information.