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fix endless loop in afl-cc allow/blocklists starting a line with a comment

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This commit is contained in:
van Hauser
2020-12-20 14:30:06 +01:00
parent a6116ed533
commit 98ee17bc47
9 changed files with 78 additions and 50 deletions
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6
docs/Changelog.md
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@ -10,9 +10,13 @@ sending a mail to <afl-users+subscribe@googlegroups.com>.
### Version ++3.01a (release)
- fix crash for very, very fast targets+systems, thanks for reporting @mhlakhani
- fix crash for very, very fast targets+systems (thanks to mhlakhani
for reporting)
- added dummy Makefile to instrumentation/
- afl-cc
- allow instrumenting LLVMFuzzerTestOneInput
- fixed endless loop for allow/blocklist lines starting with a
comment (thanks to Zherya for reporting)
### Version ++3.00c (release)

13
include/config.h
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@ -37,14 +37,14 @@
******************************************************/
/* console output colors: There are three ways to configure its behavior
* 1. default: colored outputs fixed on: defined USE_COLOR && defined ALWAYS_COLORED
* The env var. AFL_NO_COLOR will have no effect
* 1. default: colored outputs fixed on: defined USE_COLOR && defined
* ALWAYS_COLORED The env var. AFL_NO_COLOR will have no effect
* 2. defined USE_COLOR && !defined ALWAYS_COLORED
* -> depending on env var AFL_NO_COLOR=1 colors can be switched off
* at run-time. Default is to use colors.
* 3. colored outputs fixed off: !defined USE_COLOR
* The env var. AFL_NO_COLOR will have no effect
*/
*/
/* Comment out to disable terminal colors (note that this makes afl-analyze
a lot less nice): */
@ -52,9 +52,10 @@
#define USE_COLOR
#ifdef USE_COLOR
/* Comment in to always enable terminal colors */
/* Comment out to enable runtime controlled terminal colors via AFL_NO_COLOR */
#define ALWAYS_COLORED 1
/* Comment in to always enable terminal colors */
/* Comment out to enable runtime controlled terminal colors via AFL_NO_COLOR
*/
#define ALWAYS_COLORED 1
#endif
/* StatsD config

62
include/debug.h
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@ -169,65 +169,77 @@
************************/
#if defined USE_COLOR && !defined ALWAYS_COLORED
#include <unistd.h>
#pragma GCC diagnostic ignored "-Wformat-security"
static inline const char * colorfilter(const char * x) {
#include <unistd.h>
#pragma GCC diagnostic ignored "-Wformat-security"
static inline const char *colorfilter(const char *x) {
static int once = 1;
static int disabled = 0;
if (once) {
/* when there is no tty -> we always want filtering
* when AFL_NO_UI is set filtering depends on AFL_NO_COLOR
* otherwise we want always colors
*/
disabled = isatty(2) && (!getenv("AFL_NO_UI") || (!getenv("AFL_NO_COLOR") && !getenv("AFL_NO_COLOUR")));
disabled =
isatty(2) && (!getenv("AFL_NO_UI") ||
(!getenv("AFL_NO_COLOR") && !getenv("AFL_NO_COLOUR")));
once = 0;
}
if (likely(disabled)) return x;
static char monochromestring[4096];
char *d = monochromestring;
char * d = monochromestring;
int in_seq = 0;
while(*x) {
while (*x) {
if (in_seq && *x == 'm') {
in_seq = 0;
} else {
if (!in_seq && *x == '\x1b') { in_seq = 1; }
if (!in_seq) {
*d++ = *x;
}
if (!in_seq) { *d++ = *x; }
}
++x;
}
*d = '\0';
return monochromestring;
}
#else
#define colorfilter(x) x /* no filtering necessary */
#define colorfilter(x) x /* no filtering necessary */
#endif
/* macro magic to transform the first parameter to SAYF
* through colorfilter which strips coloring */
#define GET_MACRO(_1,_2,_3,_4,_5,_6,_7,_8,_9,_10,\
_11,_12,_13,_14,_15,_16,_17,_18,_19,_20,\
_21,_22,_23,_24,_25,_26,_27,_28,_29,_30,\
_31,_32,_33,_34,_35,_36,_37,_38,_39,_40,\
NAME,...) NAME
#define GET_MACRO(_1, _2, _3, _4, _5, _6, _7, _8, _9, _10, _11, _12, _13, _14, \
_15, _16, _17, _18, _19, _20, _21, _22, _23, _24, _25, _26, \
_27, _28, _29, _30, _31, _32, _33, _34, _35, _36, _37, _38, \
_39, _40, NAME, ...) \
NAME
#define SAYF(...) GET_MACRO(__VA_ARGS__, \
SAYF_N, SAYF_N, SAYF_N, SAYF_N, SAYF_N, \
SAYF_N, SAYF_N, SAYF_N, SAYF_N, SAYF_N, \
SAYF_N, SAYF_N, SAYF_N, SAYF_N, SAYF_N, \
SAYF_N, SAYF_N, SAYF_N, SAYF_N, SAYF_N, \
SAYF_N, SAYF_N, SAYF_N, SAYF_N, SAYF_N, \
SAYF_N, SAYF_N, SAYF_N, SAYF_N, SAYF_N, \
SAYF_N, SAYF_N, SAYF_N, SAYF_N, SAYF_N, \
SAYF_N, SAYF_N, SAYF_N, SAYF_N, SAYF_1)(__VA_ARGS__)
#define SAYF(...) \
GET_MACRO(__VA_ARGS__, SAYF_N, SAYF_N, SAYF_N, SAYF_N, SAYF_N, SAYF_N, \
SAYF_N, SAYF_N, SAYF_N, SAYF_N, SAYF_N, SAYF_N, SAYF_N, SAYF_N, \
SAYF_N, SAYF_N, SAYF_N, SAYF_N, SAYF_N, SAYF_N, SAYF_N, SAYF_N, \
SAYF_N, SAYF_N, SAYF_N, SAYF_N, SAYF_N, SAYF_N, SAYF_N, SAYF_N, \
SAYF_N, SAYF_N, SAYF_N, SAYF_N, SAYF_N, SAYF_N, SAYF_N, SAYF_N, \
SAYF_N, SAYF_1) \
(__VA_ARGS__)
#define SAYF_1(x) MY_SAYF(colorfilter(x))
#define SAYF_N(x,...) MY_SAYF(colorfilter(x), __VA_ARGS__)
#define SAYF_N(x, ...) MY_SAYF(colorfilter(x), __VA_ARGS__)
/* Just print stuff to the appropriate stream. */
#ifdef MESSAGES_TO_STDOUT

4
include/envs.h
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@ -78,8 +78,8 @@ static char *afl_environment_variables[] = {
"AFL_LLVM_CTX",
"AFL_LLVM_DICT2FILE",
"AFL_LLVM_DOCUMENT_IDS",
"AFL_LLVM_INSTRUMENT",
"AFL_LLVM_INSTRIM_LOOPHEAD",
"AFL_LLVM_INSTRUMENT",
"AFL_LLVM_LTO_AUTODICTIONARY",
"AFL_LLVM_AUTODICTIONARY",
"AFL_LLVM_SKIPSINGLEBLOCK",
@ -103,7 +103,7 @@ static char *afl_environment_variables[] = {
"AFL_NO_ARITH",
"AFL_NO_AUTODICT",
"AFL_NO_BUILTIN",
#if defined USE_COLOR && ! defined ALWAYS_COLORED
#if defined USE_COLOR && !defined ALWAYS_COLORED
"AFL_NO_COLOR",
"AFL_NO_COLOUR",
#endif

6
instrumentation/afl-gcc-pass.so.cc
View File

@ -622,10 +622,11 @@ struct afl_pass : gimple_opt_pass {
allowListFiles.push_back(line);
else
allowListFunctions.push_back(line);
getline(fileStream, line);
}
getline(fileStream, line);
}
if (debug)
@ -696,10 +697,11 @@ struct afl_pass : gimple_opt_pass {
denyListFiles.push_back(line);
else
denyListFunctions.push_back(line);
getline(fileStream, line);
}
getline(fileStream, line);
}
if (debug)

6
instrumentation/afl-llvm-common.cc
View File

@ -168,10 +168,11 @@ void initInstrumentList() {
allowListFiles.push_back(line);
else
allowListFunctions.push_back(line);
getline(fileStream, line);
}
getline(fileStream, line);
}
if (debug)
@ -242,10 +243,11 @@ void initInstrumentList() {
denyListFiles.push_back(line);
else
denyListFunctions.push_back(line);
getline(fileStream, line);
}
getline(fileStream, line);
}
if (debug)

2
src/afl-cc.c
View File

@ -1432,7 +1432,7 @@ int main(int argc, char **argv, char **envp) {
" AFL_LLVM_LAF_SPLIT_FLOATS: cascaded comparisons on floats\n"
" AFL_LLVM_LAF_TRANSFORM_COMPARES: cascade comparisons for string "
"functions\n"
" AFL_LLVM_INSTRUMENT_ALLOW/AFL_LLVM_INSTRUMENT_DENY: enable "
" AFL_LLVM_ALLOWLIST/AFL_LLVM_DENYLIST: enable "
"instrument allow/\n"
" deny listing (selective instrumentation)\n");

3
src/afl-fuzz-state.c
View File

@ -401,7 +401,8 @@ void read_afl_environment(afl_state_t *afl, char **envp) {
afl->afl_env.afl_crash_exitcode =
(u8 *)get_afl_env(afl_environment_variables[i]);
#if defined USE_COLOR && ! defined ALWAYS_COLORED
#if defined USE_COLOR && !defined ALWAYS_COLORED
} else if (!strncmp(env, "AFL_NO_COLOR",
afl_environment_variable_len)) {

14
src/afl-fuzz.c
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@ -157,7 +157,8 @@ static void usage(u8 *argv0, int more_help) {
if (more_help > 1) {
#if defined USE_COLOR && !defined ALWAYS_COLORED
#define DYN_COLOR "AFL_NO_COLOR or AFL_NO_COLOUR: switch colored console output off\n"
#define DYN_COLOR \
"AFL_NO_COLOR or AFL_NO_COLOUR: switch colored console output off\n"
#else
#define DYN_COLOR
#endif
@ -307,11 +308,16 @@ int main(int argc, char **argv_orig, char **envp) {
struct timeval tv;
struct timezone tz;
#if defined USE_COLOR && defined ALWAYS_COLORED
#if defined USE_COLOR && defined ALWAYS_COLORED
if (getenv("AFL_NO_COLOR") || getenv("AFL_NO_COLOUR")) {
WARNF("Setting AFL_NO_COLOR has no effect (colors are configured on at compile time)");
WARNF(
"Setting AFL_NO_COLOR has no effect (colors are configured on at "
"compile time)");
}
#endif
#endif
char **argv = argv_cpy_dup(argc, argv_orig);