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-rw-r--r--src/fluent-bit/tests/internal/fuzzers/config_fuzzer.c417
1 files changed, 417 insertions, 0 deletions
diff --git a/src/fluent-bit/tests/internal/fuzzers/config_fuzzer.c b/src/fluent-bit/tests/internal/fuzzers/config_fuzzer.c
new file mode 100644
index 000000000..5512dac29
--- /dev/null
+++ b/src/fluent-bit/tests/internal/fuzzers/config_fuzzer.c
@@ -0,0 +1,417 @@
+#include <stdint.h>
+#include <string.h>
+#include <stdlib.h>
+#include <fluent-bit/flb_parser.h>
+#include <fluent-bit/flb_slist.h>
+#include <fluent-bit/flb_kv.h>
+#include "flb_fuzz_header.h"
+
+/* A sample of configurations */
+char conf_file[] = "# Parser: no_year\n"
+"# ===============\n"
+"# the given format don't contain the Year, this is a common\n"
+"# case on old Syslog implementations.\n"
+"#\n"
+"[PARSER]\n"
+" Name no_year\n"
+" Format json\n"
+" Time_Key time\n"
+" Time_Format %b %d %H:%M:%S\n"
+" Time_Keep On\n"
+"\n"
+"# Parser: no_year_N\n"
+"# =================\n"
+"# Just for compatibility, check a string with no year but including Nanoseconds.\n"
+"#\n"
+"[PARSER]\n"
+" Name no_year_N\n"
+" Format json\n"
+" Time_Key time\n"
+" Time_Format %b %d %H:%M:%S.%L\n"
+" Time_Keep On\n"
+"\n"
+"# Parser: no_year_NC\n"
+"# =================\n"
+"# Just for compatibility, check a string with no year but including Nanoseconds with comma as fractional separator.\n"
+"#\n"
+"[PARSER]\n"
+" Name no_year_NC\n"
+" Format json\n"
+" Time_Key time\n"
+" Time_Format %b %d %H:%M:%S,%L\n"
+" Time_Keep On\n"
+"\n"
+"# Parser: no_year_TZ\n"
+"# =================\n"
+"# Time string with no year and including timezone\n"
+"#\n"
+"[PARSER]\n"
+" Name no_year_TZ\n"
+" Format json\n"
+" Time_Key time\n"
+" Time_Format %b %d %H:%M:%S %z\n"
+" Time_Keep On\n"
+"\n"
+"# Parser: no_year_N_TZ\n"
+"# ====================\n"
+"# Time string with no year, nanoseconds and timezone\n"
+"#\n"
+"[PARSER]\n"
+" Name no_year_N_TZ\n"
+" Format json\n"
+" Time_Key time\n"
+" Time_Format %b %d %H:%M:%S.%L %z\n"
+" Time_Keep On\n"
+"\n"
+"\n"
+"# Parser: no_year_NC_TZ\n"
+"# ====================\n"
+"# Time string with no year, nanoseconds and timezone with comma as fractional separator.\n"
+"#\n"
+"[PARSER]\n"
+" Name no_year_NC_TZ\n"
+" Format json\n"
+" Time_Key time\n"
+" Time_Format %b %d %H:%M:%S,%L %z\n"
+" Time_Keep On\n"
+"\n"
+"\n"
+"# Parser: default_UTC\n"
+"# ===================\n"
+"# Time string with timezone in UTC\n"
+"#\n"
+"[PARSER]\n"
+" Name default_UTC\n"
+" Format json\n"
+" Time_Key time\n"
+" Time_Format %m/%d/%Y %H:%M:%S\n"
+" Time_Keep On\n"
+"\n"
+"# Parser: default_UTC_Z\n"
+"# =====================\n"
+"# Time string with timezone in UTC and ending Z\n"
+"#\n"
+"[PARSER]\n"
+" Name default_UTC_Z\n"
+" Format json\n"
+" Time_Key time\n"
+" Time_Format %m/%d/%Y %H:%M:%SZ\n"
+" Time_Keep On\n"
+"\n"
+"# Parser: default_UTC_N_Z\n"
+"# =======================\n"
+"# Time string with timezone in UTC, nanoseconds and ending Z\n"
+"#\n"
+"[PARSER]\n"
+" Name default_UTC_N_Z\n"
+" Format json\n"
+" Time_Key time\n"
+" Time_Format %m/%d/%Y %H:%M:%S.%LZ\n"
+" Time_Keep On\n"
+"\n"
+"# Parser: default_UTC_NC_Z\n"
+"# =======================\n"
+"# Time string with timezone in UTC, nanoseconds with comma as fractional separator and ending Z\n"
+"#\n"
+"[PARSER]\n"
+" Name default_UTC_NC_Z\n"
+" Format json\n"
+" Time_Key time\n"
+" Time_Format %m/%d/%Y %H:%M:%S,%LZ\n"
+" Time_Keep On\n"
+"\n"
+"# Parser: generic_TZ\n"
+"# ==================\n"
+"# Generic date with timezone\n"
+"#\n"
+"[PARSER]\n"
+" Name generic_TZ\n"
+" Format json\n"
+" Time_Key time\n"
+" Time_Format %m/%d/%Y %H:%M:%S %z\n"
+" Time_Keep On\n"
+"\n"
+"# Parser: generic\n"
+"# ===============\n"
+"# Generic date\n"
+"#\n"
+"[PARSER]\n"
+" Name generic\n"
+" Format json\n"
+" Time_Key time\n"
+" Time_Format %m/%d/%Y %H:%M:%S\n"
+" Time_Keep On\n"
+"\n"
+"# Parser: generic_N\n"
+"# ===============\n"
+"# Generic date with nanoseconds\n"
+"#\n"
+"[PARSER]\n"
+" Name generic_N\n"
+" Format json\n"
+" Time_Key time\n"
+" Time_Format %m/%d/%Y %H:%M:%S.%L\n"
+" Time_Keep On\n"
+"\n"
+"# Parser: generic_NC\n"
+"# ===============\n"
+"# Generic date with nanoseconds with comma as fractional separator\n"
+"#\n"
+"[PARSER]\n"
+" Name generic_NC\n"
+" Format json\n"
+" Time_Key time\n"
+" Time_Format %m/%d/%Y %H:%M:%S,%L\n"
+" Time_Keep On\n"
+"\n"
+"# Parser: generic_N_TZ\n"
+"# ====================\n"
+"# Generic date with nanoseconds and timezone\n"
+"#\n"
+"[PARSER]\n"
+" Name generic_N_TZ\n"
+" Format json\n"
+" Time_Key time\n"
+" Time_Format %m/%d/%Y %H:%M:%S.%L %z\n"
+" Time_Keep On\n"
+"\n"
+"# Parser: generic_NC_TZ\n"
+"# ====================\n"
+"# Generic date with nanoseconds with comma as fractional separator and timezone\n"
+"#\n"
+"[PARSER]\n"
+" Name generic_NC_TZ\n"
+" Format json\n"
+" Time_Key time\n"
+" Time_Format %m/%d/%Y %H:%M:%S,%L %z\n"
+" Time_Keep On\n"
+"\n"
+"# Parser: apache_error\n"
+"# ====================\n"
+"# Apache error log time format\n"
+"#\n"
+"[PARSER]\n"
+" Name apache_error\n"
+" Format json\n"
+" Time_Key time\n"
+" Time_Format %a %b %d %H:%M:%S.%L %Y\n"
+" Time_Keep On\n"
+"# Parser: mysql_quoted_stuff\n"
+"# ====================\n"
+"# Apache error log time format\n"
+"#\n"
+"[PARSER]\n"
+" Name mysql_quoted_stuff\n"
+" Format regex\n"
+" Regex ^(?<time>.*?),(?<key001>.*)$\n"
+" Time_Key time\n"
+" Time_Format %Y-%M-%S %H:%M:%S\n"
+" Time_Keep On\n"
+" Decode_Field_As mysql_quoted key001\n"
+"# Parser: REGEX_generic_NC_TZ\n"
+"# ====================\n"
+"# Generic date with nanoseconds with comma as fractional separator and timezone\n"
+"#\n"
+"[PARSER]\n"
+" Name REGEX_generic_NC_TZ\n"
+" Format regex\n"
+" Regex ^(?<key001>[^ ]*) (?<key002>[^ ]*) (?<time>.+)$\n"
+" Time_Key time\n"
+" Time_Format %m/%d/%Y %H:%M:%S,%L %z\n"
+" Time_Keep On\n"
+"\n"
+"# Parser: REGEX_apache_error\n"
+"# ====================\n"
+"# Apache error log time format\n"
+"#\n"
+"[PARSER]\n"
+" Name REGEX_apache_error\n"
+" Format regex\n"
+" Regex ^(?<key001>[^ ]*) (?<key002>[^ ]*) (?<time>.+)$\n"
+" Time_Key time\n"
+" Time_Format %a %b %d %H:%M:%S.%L %Y\n"
+" Time_Keep On\n"
+"\n"
+"\n"
+"\n"
+"# Parser: REGEX_mysql_quoted_stuff\n"
+"# ====================\n"
+"# Apache error log time format\n"
+"#\n"
+"[PARSER]\n"
+" Name REGEX_mysql_quoted_stuff\n"
+" Format regex\n"
+" Regex ^(?<time>.*?),(?<key001>.*)$\n"
+" Time_Key time\n"
+" Time_Format %Y-%M-%S %H:%M:%S\n"
+" Time_Keep On\n"
+" Decode_Field_As mysql_quoted key001\n"
+"\n"
+"\n"
+"\n"
+"# Parser: REGEX2_mysql_quoted_stuff\n"
+"# ====================\n"
+"# Apache error log time format\n"
+"#\n"
+"[PARSER]\n"
+" Name REGEX2_mysql_quoted_stuff\n"
+" Format logfmt\n"
+" Regex ^(?<time>.*?),(?<key001>.*)$\n"
+" Time_Key time\n"
+" Time_Format %Y-%M-%S %H:%M:%S\n"
+" Time_Keep On\n"
+" Decode_Field_As mysql_quoted key001\n"
+" Types A1:integer A2:string A3:bool A4:float A5:hex\n"
+"\n"
+"\n"
+"\n"
+"# Parser: REGEX3_mysql_quoted_stuff\n"
+"# ====================\n"
+"# Apache error log time format\n"
+"#\n"
+"[PARSER]\n"
+" Name REGEX3_mysql_quoted_stuff\n"
+" Format json\n"
+" Regex ^(?<time>.*?),(?<key001>.*)$\n"
+" Time_Key time\n"
+" Time_Format %Y-%M-%S %H:%M:%S\n"
+" Time_Keep On\n"
+" Decode_Field_As escaped_utf8 key001\n"
+" Types A1:integer A2:string A3:bool A4:float A5:hex\n"
+"\n"
+"\n"
+"\n"
+"# Parser: REGEX33_mysql_quoted_stuff\n"
+"# ====================\n"
+"# Apache error log time format\n"
+"#\n"
+"[PARSER]\n"
+" Name REGEX33_mysql_quoted_stuff\n"
+" Format json\n"
+" Regex ^(?<time>.*?),(?<key001>.*)$\n"
+" Time_Key time\n"
+" Time_Format %Y-%M-%S %H:%M:%S\n"
+" Time_Keep On\n"
+" Decode_Field_As escaped key001\n"
+" Types A1:integer A2:string A3:bool A4:float A5:hex\n"
+"\n"
+"\n"
+"\n"
+"# Parser: REGEX4_mysql_quoted_stuff\n"
+"# ====================\n"
+"# Apache error log time format\n"
+"#\n"
+"[PARSER]\n"
+" Name REGEX4_mysql_quoted_stuff\n"
+" Format json\n"
+" Regex ^(?<time>.*?),(?<key001>.*)$\n"
+" Time_Key time\n"
+" Time_Format %Y-%M-%S %H:%M:%S\n"
+" Time_Keep On\n"
+" Decode_Field_As json key001\n"
+" Types A1:integer A2:string A3:bool A4:float A5:hex\n"
+"[MULTILINE_PARSER]\n"
+" name exception_test\n"
+" type regex\n"
+" flush_timeout 1000\n"
+" rule \"start_state\" \"/(Dec \\d+ \\d+\\:\\d+\\:\\d+)(.*)/\" \"cont\"\n"
+" rule \"cont\" \"/^\\s+at.*/\" \"cont\"\n";
+
+
+int LLVMFuzzerTestOneInput(const uint8_t *data, size_t size)
+{
+ /* Set fuzzer-malloc chance of failure */
+ flb_malloc_p = 0;
+ flb_malloc_mod = 25000;
+
+ /* Limit the size of the config files to 32KB. */
+ if (size > 32768) {
+ return 0;
+ }
+
+ /* Write the config file to a location we know OSS-Fuzz has */
+ char filename[256];
+ sprintf(filename, "/tmp/libfuzzer.%d", getpid());
+ FILE *fp = fopen(filename, "wb");
+ if (!fp) {
+ return 0;
+ }
+ fwrite(conf_file, strlen(conf_file), 1, fp);
+ fclose(fp);
+
+
+ /* Now parse random data based on the config files */
+ struct flb_config *config = NULL;
+ config = flb_config_init();
+ int ret = flb_parser_conf_file(filename, config);
+ if (ret == 0) {
+ struct mk_list *head = NULL;
+ mk_list_foreach(head, &config->parsers) {
+ size_t out_size;
+ char *out_buf = NULL;
+ struct flb_parser *parser = NULL;
+ struct flb_time out_time;
+ parser = mk_list_entry(head, struct flb_parser, _head);
+ flb_parser_do(parser, (const char*)data, size, (void **)&out_buf,
+ &out_size, &out_time);
+ if (out_buf != NULL) {
+ free(out_buf);
+ }
+ }
+ }
+ flb_parser_exit(config);
+ flb_config_exit(config);
+
+ if (size > 100) {
+ /* Now let's do a second run where we also call flb_config_set_property */
+ config = flb_config_init();
+ ret = flb_parser_conf_file(filename, config);
+ char *key_1 = get_null_terminated(15, &data, &size);
+ char *val_1 = get_null_terminated(15, &data, &size);
+ char *key_2 = get_null_terminated(15, &data, &size);
+ char *val_2 = get_null_terminated(15, &data, &size);
+ char *progname = get_null_terminated(15, &data, &size);
+
+ flb_config_set_property(config, key_1, val_1);
+ flb_config_set_property(config, key_2, val_2);
+ flb_config_set_program_name(config, progname);
+ set_log_level_from_env(config);
+
+ struct mk_list prop;
+ flb_kv_init(&prop);
+ flb_kv_item_create(&prop, key_1, val_1);
+ flb_config_prop_get(progname, &prop);
+ flb_slist_entry_get(&prop, (int)data[0]);
+ flb_slist_dump(&prop);
+
+ if (ret == 0) {
+ struct mk_list *head = NULL;
+ mk_list_foreach(head, &config->parsers) {
+ size_t out_size;
+ char *out_buf = NULL;
+ struct flb_parser *parser = NULL;
+ struct flb_time out_time;
+
+ parser = mk_list_entry(head, struct flb_parser, _head);
+ flb_parser_do(parser, (const char*)data, size, (void **)&out_buf,
+ &out_size, &out_time);
+ if (out_buf != NULL) {
+ free(out_buf);
+ }
+ }
+ }
+ flb_parser_exit(config);
+ flb_config_exit(config);
+ flb_free(key_1);
+ flb_free(val_1);
+ flb_free(key_2);
+ flb_free(val_2);
+ flb_free(progname);
+ flb_kv_release(&prop);
+ }
+
+ /* clean up the file */
+ unlink(filename);
+
+ return 0;
+}
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