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add AFL_FORKSRV_UID and AFL_FORKSRV_GID env vars

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GRAUX Pierre
2025-04-23 14:39:31 +02:00
parent a9900f02cb
commit c8d1b66af3
23 changed files with 536 additions and 77 deletions
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23
include/afl-fuzz.h
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@ -462,7 +462,10 @@ typedef struct afl_env_vars {
afl_no_startup_calibration, afl_no_warn_instability,
afl_post_process_keep_original, afl_crashing_seeds_as_new_crash,
afl_final_sync, afl_ignore_seed_problems, afl_disable_redundant,
afl_sha1_filenames, afl_no_sync, afl_no_fastresume;
afl_sha1_filenames, afl_no_sync, afl_no_fastresume, afl_forksrv_uid_set,
afl_forksrv_gid_set;
u16 afl_forksrv_nb_supl_gids;
u8 *afl_tmpdir, *afl_custom_mutator_library, *afl_python_module, *afl_path,
*afl_hang_tmout, *afl_forksrv_init_tmout, *afl_preload,
@ -473,6 +476,12 @@ typedef struct afl_env_vars {
s32 afl_pizza_mode;
uid_t afl_forksrv_uid;
gid_t afl_forksrv_gid;
gid_t *afl_forksrv_supl_gids;
} afl_env_vars_t;
struct afl_pass_stat {
@ -555,6 +564,10 @@ typedef struct afl_state {
*orig_cmdline, /* Original command line */
*infoexec; /* Command to execute on a new crash */
mode_t perm, /* File permission when creating files */
dir_perm; /* File permission when creating directories */
u8 chown_needed; /* Group owner of files needs to be modified */
u32 hang_tmout, /* Timeout used for hang det (ms) */
stats_update_freq; /* Stats update frequency (execs) */
@ -1443,7 +1456,7 @@ char *sha1_hex_for_file(const char *fname, u32 len);
* enabled. */
static inline int permissive_create(afl_state_t *afl, const char *fn) {
int fd = open(fn, O_WRONLY | O_CREAT | O_EXCL, DEFAULT_PERMISSION);
int fd = open(fn, O_WRONLY | O_CREAT | O_EXCL, afl->perm);
if (unlikely(fd < 0)) {
if (!(afl->afl_env.afl_sha1_filenames && errno == EEXIST)) {
@ -1454,6 +1467,12 @@ static inline int permissive_create(afl_state_t *afl, const char *fn) {
}
if (afl->chown_needed) {
if (fchown(fd, -1, afl->fsrv.gid) == -1) { PFATAL("fchown() failed"); }
}
return fd;
}