From 3d031f93a6366ee157cfd9a27fbb6d485d328d8e Mon Sep 17 00:00:00 2001 From: Maciej Domanski Date: Tue, 27 Dec 2022 16:15:52 +0100 Subject: update --- utils/argv_fuzzing/argv_fuzz_persistent_demo.c | 23 ++++++++++++++++++++++- 1 file changed, 22 insertions(+), 1 deletion(-) (limited to 'utils/argv_fuzzing/argv_fuzz_persistent_demo.c') diff --git a/utils/argv_fuzzing/argv_fuzz_persistent_demo.c b/utils/argv_fuzzing/argv_fuzz_persistent_demo.c index 1e96ade1..a96cf1fe 100644 --- a/utils/argv_fuzzing/argv_fuzz_persistent_demo.c +++ b/utils/argv_fuzzing/argv_fuzz_persistent_demo.c @@ -1,28 +1,49 @@ +/* +This file contains a simple fuzzer for testing command line argument parsing +using persistent mode. +*/ + #include #include #include "argv-fuzz-inl.h" __AFL_FUZZ_INIT(); +/* The main function is an entry point for a program. + The argc parameter is an integer that indicates the number of arguments + passed to the program. The argv parameter is an array of character pointers, + with each element pointing to a null-terminated string that represents + one of the arguments. + */ int main(int argc, char **argv) { #ifdef __AFL_HAVE_MANUAL_CONTROL __AFL_INIT(); #endif unsigned char *buf = __AFL_FUZZ_TESTCASE_BUF; + /* __AFL_LOOP() limits the maximum number of iterations before exiting + the loop and allowing the program to terminate. It protects against + accidental memory leaks and similar issues. */ while (__AFL_LOOP(100000)) { int len = __AFL_FUZZ_TESTCASE_LEN; + // Check that the length of the test case is at least 8 bytes if (len < 8) continue; + // Initialize the command line arguments using the testcase buffer AFL_INIT_ARGV_PERSISTENT(buf); + /* Check if the first argument is "XYZ" and the second argument is "TEST2" + If so, call the "abort" function to terminate the program. + Otherwise, print an error message. */ if (argc > 1 && strcmp(argv[1], "XYZ") == 0) { if (strcmp(argv[2], "TEST2") == 0) { abort(); } } else { printf("Bad number of arguments!\n"); } } - + /* Exiting the loop allows the program to terminate normally. AFL will restart + the process with a clean slate for allocated memory, file descriptors, etc. + */ return 0; } \ No newline at end of file -- cgit 1.4.1