selinux/libsepol/fuzz/binpolicy-fuzzer.c

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#include <sepol/debug.h>
#include <sepol/kernel_to_cil.h>
#include <sepol/kernel_to_conf.h>
#include <sepol/policydb/policydb.h>
extern int policydb_validate(sepol_handle_t *handle, const policydb_t *p);
extern int LLVMFuzzerTestOneInput(const uint8_t *data, size_t size);
static int write_binary_policy(policydb_t *p, FILE *outfp)
{
struct policy_file pf;
policy_file_init(&pf);
pf.type = PF_USE_STDIO;
pf.fp = outfp;
return policydb_write(p, &pf);
}
int LLVMFuzzerTestOneInput(const uint8_t *data, size_t size)
{
policydb_t policydb = {};
sidtab_t sidtab = {};
struct policy_file pf;
FILE *devnull = NULL;
sepol_debug(0);
policy_file_init(&pf);
pf.type = PF_USE_MEMORY;
pf.data = (char *) data;
pf.len = size;
if (policydb_init(&policydb))
goto exit;
if (policydb_read(&policydb, &pf, /*verbose=*/0))
goto exit;
if (policydb_load_isids(&policydb, &sidtab))
goto exit;
if (policydb.policy_type == POLICY_KERN) {
(void) policydb_optimize(&policydb);
if (policydb_validate(NULL, &policydb) == -1)
abort();
}
(void) check_assertions(NULL, &policydb, policydb.global->branch_list->avrules);
devnull = fopen("/dev/null", "we");
if (!devnull)
goto exit;
if (write_binary_policy(&policydb, devnull))
abort();
if (sepol_kernel_policydb_to_conf(devnull, &policydb))
abort();
if (sepol_kernel_policydb_to_cil(devnull, &policydb))
abort();
exit:
if (devnull != NULL)
fclose(devnull);
policydb_destroy(&policydb);
sepol_sidtab_destroy(&sidtab);
/* Non-zero return values are reserved for future use. */
return 0;
}