? github.com/google/syzkaller/dashboard/dashapi [no test files] ok github.com/google/syzkaller/dashboard/app 0.987s ? github.com/google/syzkaller/pkg/debugtracer [no test files] ? github.com/google/syzkaller/pkg/gcs [no test files] ? github.com/google/syzkaller/pkg/hash [no test files] ? github.com/google/syzkaller/pkg/html/pages [no test files] ? github.com/google/syzkaller/pkg/ifuzz/powerpc [no test files] ? github.com/google/syzkaller/pkg/ifuzz/powerpc/generated [no test files] ? github.com/google/syzkaller/pkg/ifuzz/iset [no test files] ? github.com/google/syzkaller/pkg/ifuzz/x86 [no test files] ? github.com/google/syzkaller/pkg/ifuzz/x86/gen [no test files] ? github.com/google/syzkaller/pkg/ifuzz/x86/generated [no test files] ok github.com/google/syzkaller/executor 19.804s ok github.com/google/syzkaller/pkg/asset 0.817s ok github.com/google/syzkaller/pkg/ast 1.257s ok github.com/google/syzkaller/pkg/auth (cached) ? github.com/google/syzkaller/pkg/ipc/ipcconfig [no test files] ? github.com/google/syzkaller/pkg/kcidb [no test files] ? github.com/google/syzkaller/pkg/report/crash [no test files] ? github.com/google/syzkaller/pkg/rpctype [no test files] ? github.com/google/syzkaller/pkg/stats/syzbotstats [no test files] ? github.com/google/syzkaller/pkg/testutil [no test files] ? github.com/google/syzkaller/pkg/tools [no test files] ? github.com/google/syzkaller/sys [no test files] ? github.com/google/syzkaller/sys/akaros [no test files] ? github.com/google/syzkaller/sys/akaros/gen [no test files] ? github.com/google/syzkaller/sys/darwin [no test files] ? github.com/google/syzkaller/sys/darwin/gen [no test files] ? github.com/google/syzkaller/sys/freebsd [no test files] ? github.com/google/syzkaller/sys/freebsd/gen [no test files] ? github.com/google/syzkaller/sys/fuchsia [no test files] ? github.com/google/syzkaller/sys/fuchsia/fidlgen [no test files] ? github.com/google/syzkaller/sys/fuchsia/gen [no test files] ? github.com/google/syzkaller/sys/fuchsia/layout [no test files] ? github.com/google/syzkaller/sys/linux/gen [no test files] ? github.com/google/syzkaller/sys/netbsd/gen [no test files] ? github.com/google/syzkaller/sys/openbsd/gen [no test files] ? github.com/google/syzkaller/sys/syz-extract [no test files] ? github.com/google/syzkaller/sys/syz-sysgen [no test files] ? github.com/google/syzkaller/sys/targets [no test files] ? github.com/google/syzkaller/sys/test [no test files] ? github.com/google/syzkaller/sys/test/gen [no test files] ? github.com/google/syzkaller/sys/trusty [no test files] ? github.com/google/syzkaller/sys/trusty/gen [no test files] ? github.com/google/syzkaller/sys/windows [no test files] ? github.com/google/syzkaller/sys/windows/gen [no test files] ? github.com/google/syzkaller/syz-runner [no test files] ? github.com/google/syzkaller/tools/syz-benchcmp [no test files] ? github.com/google/syzkaller/tools/syz-bisect [no test files] ? github.com/google/syzkaller/tools/syz-build [no test files] ? github.com/google/syzkaller/tools/syz-check [no test files] ? github.com/google/syzkaller/tools/syz-cover [no test files] ? github.com/google/syzkaller/tools/syz-crush [no test files] ? github.com/google/syzkaller/tools/syz-db [no test files] ? github.com/google/syzkaller/tools/syz-execprog [no test files] ? github.com/google/syzkaller/tools/syz-expand [no test files] ? github.com/google/syzkaller/tools/syz-fillreports [no test files] ? github.com/google/syzkaller/tools/syz-fmt [no test files] ? github.com/google/syzkaller/tools/syz-hubtool [no test files] ? github.com/google/syzkaller/tools/syz-kcidb [no test files] ? github.com/google/syzkaller/tools/syz-lore [no test files] ? github.com/google/syzkaller/tools/syz-make [no test files] ? github.com/google/syzkaller/tools/syz-minconfig [no test files] ? github.com/google/syzkaller/tools/syz-mutate [no test files] ? github.com/google/syzkaller/tools/syz-prog2c [no test files] ? github.com/google/syzkaller/tools/syz-query-subsystems [no test files] ? github.com/google/syzkaller/tools/syz-reporter [no test files] ? github.com/google/syzkaller/tools/syz-repro [no test files] ? github.com/google/syzkaller/tools/syz-reprolist [no test files] ? github.com/google/syzkaller/tools/syz-runtest [no test files] ? github.com/google/syzkaller/tools/syz-stress [no test files] ? github.com/google/syzkaller/tools/syz-symbolize [no test files] ? github.com/google/syzkaller/tools/syz-showprio [no test files] ? github.com/google/syzkaller/tools/syz-testbuild [no test files] ? github.com/google/syzkaller/tools/syz-trace2syz [no test files] ? github.com/google/syzkaller/tools/syz-tty [no test files] ? github.com/google/syzkaller/tools/syz-upgrade [no test files] ? github.com/google/syzkaller/tools/syz-usbgen [no test files] ? github.com/google/syzkaller/vm/adb [no test files] ? github.com/google/syzkaller/vm/bhyve [no test files] ? github.com/google/syzkaller/vm/cuttlefish [no test files] ? github.com/google/syzkaller/vm/gce [no test files] ? github.com/google/syzkaller/vm/gvisor [no test files] ? github.com/google/syzkaller/vm/kvm [no test files] ? github.com/google/syzkaller/vm/odroid [no test files] ? github.com/google/syzkaller/vm/proxyapp/mocks [no test files] ? github.com/google/syzkaller/vm/proxyapp/proxyrpc [no test files] ? github.com/google/syzkaller/vm/qemu [no test files] ? github.com/google/syzkaller/vm/starnix [no test files] ? github.com/google/syzkaller/vm/vmm [no test files] ? github.com/google/syzkaller/vm/vmware [no test files] ok github.com/google/syzkaller/pkg/bisect 225.747s ok github.com/google/syzkaller/pkg/bisect/minimize (cached) ok github.com/google/syzkaller/pkg/build 12.907s ok github.com/google/syzkaller/pkg/compiler 21.860s ok github.com/google/syzkaller/pkg/config 0.110s ok github.com/google/syzkaller/pkg/corpus 5.495s ok github.com/google/syzkaller/pkg/cover 0.350s ok github.com/google/syzkaller/pkg/cover/backend 4.122s --- FAIL: TestGenerate (45.37s) --- FAIL: TestGenerate/test/64 (0.01s) testutil.go:33: seed=1712054310247101120 testutil.go:33: seed=1712054310258933075 --- FAIL: TestGenerate/test/64/5 (1.15s) csource_test.go:150: opts: {Threaded:true Repeat:true RepeatTimes:0 Procs:4 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:false NetDevices:false NetReset:false Cgroups:false BinfmtMisc:false CloseFDs:false KCSAN:false DevlinkPCI:false NicVF:false USB:false VhciInjection:false Wifi:false IEEE802154:false Sysctl:false Swap:false UseTmpDir:true HandleSegv:false Repro:false Trace:false LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}} program: test$r101_producer_recur(&(0x7f0000000040)={&(0x7f0000000000)={0x0}}) (fail_nth: 1) test$r101_consumer(r0) (async) test$int(0x7a, 0xc3, 0x66f5, 0x9, 0x8) (rerun: 4) test$r104_producer(&(0x7f0000000080)=0x0) test$r104_producer(&(0x7f0000000100)=0x0) test$r103_producer_r104_consumer(&(0x7f00000000c0)={0x0, r1}, &(0x7f0000000140)={0x0, r2}) test$r104_producer(&(0x7f0000000180)=0x0) test$r104_producer(&(0x7f0000000200)=0x0) test$r103_producer_r104_consumer(&(0x7f00000001c0)={0x0, r3}, &(0x7f0000000240)={0x0, r4}) test$r101_producer_recur(&(0x7f00000002c0)={&(0x7f0000000280)}) syz_compare(&(0x7f0000000000)='\x00', 0x1, &(0x7f0000000040)=@bf9={0x7, {0x4, 0x6, 0x2}}, 0x4) syz_compare_int$2(0x2, 0x4, 0x3) syz_errno(0x1) syz_execute_func(&(0x7f0000000080)="dd683c971707a147f5d7cef54fa2b1cc0ea941b632ccb11d08800db324fedcf47f09abbfa934383009852cf38daa1a9d273a") syz_exit(0x4) syz_mmap(&(0x7f0000ffd000/0x3000)=nil, 0x3000) syz_sleep_ms(0x83) syz_test_fuzzer1(0xa, 0xd, 0xd) csource_test.go:151: failed to build program: // autogenerated by syzkaller (https://github.com/google/syzkaller) #define _GNU_SOURCE #include #include #include #include #include #include #include #include #include #include #include #include #ifndef SYS_test #define SYS_test 0 #endif static unsigned long long procid; static void sleep_ms(uint64_t ms) { usleep(ms * 1000); } static uint64_t current_time_ms(void) { struct timespec ts; if (clock_gettime(CLOCK_MONOTONIC, &ts)) exit(1); return (uint64_t)ts.tv_sec * 1000 + (uint64_t)ts.tv_nsec / 1000000; } static void use_temporary_dir(void) { char tmpdir_template[] = "./syzkaller.XXXXXX"; char* tmpdir = mkdtemp(tmpdir_template); if (!tmpdir) exit(1); if (chmod(tmpdir, 0777)) exit(1); if (chdir(tmpdir)) exit(1); } static int inject_fault(int nth) { return 0; } static void setup_fault() { } static void thread_start(void* (*fn)(void*), void* arg) { pthread_t th; pthread_attr_t attr; pthread_attr_init(&attr); pthread_attr_setstacksize(&attr, 128 << 10); int i = 0; for (; i < 100; i++) { if (pthread_create(&th, &attr, fn, arg) == 0) { pthread_attr_destroy(&attr); return; } if (errno == EAGAIN) { usleep(50); continue; } break; } exit(1); } typedef struct { pthread_mutex_t mu; pthread_cond_t cv; int state; } event_t; static void event_init(event_t* ev) { if (pthread_mutex_init(&ev->mu, 0)) exit(1); if (pthread_cond_init(&ev->cv, 0)) exit(1); ev->state = 0; } static void event_reset(event_t* ev) { ev->state = 0; } static void event_set(event_t* ev) { pthread_mutex_lock(&ev->mu); if (ev->state) exit(1); ev->state = 1; pthread_mutex_unlock(&ev->mu); pthread_cond_broadcast(&ev->cv); } static void event_wait(event_t* ev) { pthread_mutex_lock(&ev->mu); while (!ev->state) pthread_cond_wait(&ev->cv, &ev->mu); pthread_mutex_unlock(&ev->mu); } static int event_isset(event_t* ev) { pthread_mutex_lock(&ev->mu); int res = ev->state; pthread_mutex_unlock(&ev->mu); return res; } static int event_timedwait(event_t* ev, uint64_t timeout) { uint64_t start = current_time_ms(); uint64_t now = start; pthread_mutex_lock(&ev->mu); for (;;) { if (ev->state) break; uint64_t remain = timeout - (now - start); struct timespec ts; ts.tv_sec = remain / 1000; ts.tv_nsec = (remain % 1000) * 1000 * 1000; pthread_cond_timedwait(&ev->cv, &ev->mu, &ts); now = current_time_ms(); if (now - start > timeout) break; } int res = ev->state; pthread_mutex_unlock(&ev->mu); return res; } #define BITMASK(bf_off,bf_len) (((1ull << (bf_len)) - 1) << (bf_off)) #define STORE_BY_BITMASK(type,htobe,addr,val,bf_off,bf_len) *(type*)(addr) = htobe((htobe(*(type*)(addr)) & ~BITMASK((bf_off), (bf_len))) | (((type)(val) << (bf_off)) & BITMASK((bf_off), (bf_len)))) static long syz_mmap(volatile long a0, volatile long a1) { return (long)mmap((void*)a0, a1, PROT_READ | PROT_WRITE, MAP_ANON | MAP_PRIVATE | MAP_FIXED, -1, 0); } static long syz_errno(volatile long v) { errno = v; return v == 0 ? 0 : -1; } static long syz_exit(volatile long status) { _exit(status); return 0; } static long syz_sleep_ms(volatile long ms) { sleep_ms(ms); return 0; } static long syz_compare(volatile long want, volatile long want_len, volatile long got, volatile long got_len) { if (want_len != got_len) { errno = EBADF; goto error; } if (memcmp((void*)want, (void*)got, want_len)) { errno = EINVAL; goto error; } return 0; error: return -1; } static long syz_compare_int(volatile long n, ...) { va_list args; va_start(args, n); long v0 = va_arg(args, long); long v1 = va_arg(args, long); long v2 = va_arg(args, long); long v3 = va_arg(args, long); va_end(args); if (n < 2 || n > 4) return errno = E2BIG, -1; if (n <= 2 && v2 != 0) return errno = EFAULT, -1; if (n <= 3 && v3 != 0) return errno = EFAULT, -1; if (v0 != v1) return errno = EINVAL, -1; if (n > 2 && v0 != v2) return errno = EINVAL, -1; if (n > 3 && v0 != v3) return errno = EINVAL, -1; return 0; } static void loop(); static int do_sandbox_none(void) { loop(); return 0; } static void fake_crash(const char* name) { exit(1); exit(1); } static long syz_test_fuzzer1(volatile long a, volatile long b, volatile long c) { if (a == 1 && b == 1 && c == 1) fake_crash("first bug"); if (a == 1 && b == 2 && c == 3) fake_crash("second bug"); return 0; } static long syz_execute_func(volatile long text) { ((void (*)(void))(text))(); return 0; } struct thread_t { int created, call; event_t ready, done; }; static struct thread_t threads[16]; static void execute_call(int call); static int running; static void* thr(void* arg) { struct thread_t* th = (struct thread_t*)arg; for (;;) { event_wait(&th->ready); event_reset(&th->ready); execute_call(th->call); __atomic_fetch_sub(&running, 1, __ATOMIC_RELAXED); event_set(&th->done); } return 0; } static void execute_one(void) { int i, call, thread; for (call = 0; call < 18; call++) { for (thread = 0; thread < (int)(sizeof(threads) / sizeof(threads[0])); thread++) { struct thread_t* th = &threads[thread]; if (!th->created) { th->created = 1; event_init(&th->ready); event_init(&th->done); event_set(&th->done); thread_start(thr, th); } if (!event_isset(&th->done)) continue; event_reset(&th->done); th->call = call; __atomic_fetch_add(&running, 1, __ATOMIC_RELAXED); event_set(&th->ready); if (call == 1) break; event_timedwait(&th->done, 50); break; } } for (i = 0; i < 100 && __atomic_load_n(&running, __ATOMIC_RELAXED); i++) sleep_ms(1); } static void execute_one(void); static void loop(void) { execute_one(); } uint64_t r[5] = {0x0, 0x0, 0x0, 0x0, 0x0}; void execute_call(int call) { intptr_t res = 0; switch (call) { case 0: *(uint64_t*)0x20000040 = 0x20000000; inject_fault(1); res = syscall(SYS_test, /*a=*/0x20000040ul, 0, 0, 0, 0, 0); if (res != -1) r[0] = *(uint32_t*)0x20000000; break; case 1: syscall(SYS_test, /*a=*/r[0], 0, 0, 0, 0, 0); break; case 2: syscall(SYS_test, /*a0=*/0x7aul, /*a1=*/0xc3, /*a2=*/0x66f5, /*a3=*/9, /*a4=*/8ul, 0); { int i; for(i = 0; i < 4; i++) { syscall(SYS_test, /*a0=*/0x7aul, /*a1=*/0xc3, /*a2=*/0x66f5, /*a3=*/9, /*a4=*/8ul, 0); } } break; case 3: res = syscall(SYS_test, /*a=*/0x20000080ul, 0, 0, 0, 0, 0); if (res != -1) r[1] = *(uint32_t*)0x20000080; break; case 4: res = syscall(SYS_test, /*a=*/0x20000100ul, 0, 0, 0, 0, 0); if (res != -1) r[2] = *(uint32_t*)0x20000100; break; case 5: *(uint32_t*)0x200000c4 = r[1]; *(uint32_t*)0x20000144 = r[2]; syscall(SYS_test, /*a=*/0x200000c0ul, /*b=*/0x20000140ul, 0, 0, 0, 0); break; case 6: res = syscall(SYS_test, /*a=*/0x20000180ul, 0, 0, 0, 0, 0); if (res != -1) r[3] = *(uint32_t*)0x20000180; break; case 7: res = syscall(SYS_test, /*a=*/0x20000200ul, 0, 0, 0, 0, 0); if (res != -1) r[4] = *(uint32_t*)0x20000200; break; case 8: *(uint32_t*)0x200001c4 = r[3]; *(uint32_t*)0x20000244 = r[4]; syscall(SYS_test, /*a=*/0x200001c0ul, /*b=*/0x20000240ul, 0, 0, 0, 0); break; case 9: *(uint64_t*)0x200002c0 = 0x20000280; syscall(SYS_test, /*a=*/0x200002c0ul, 0, 0, 0, 0, 0); break; case 10: memset((void*)0x20000000, 0, 1); *(uint8_t*)0x20000040 = 7; *(uint8_t*)0x20000042 = 4; STORE_BY_BITMASK(uint16_t, , 0x20000042, 6, 8, 4); STORE_BY_BITMASK(uint16_t, , 0x20000042, 2, 12, 4); syz_compare(/*want=*/0x20000000, /*want_len=*/1, /*got=*/0x20000040, /*got_len=*/4); break; case 11: syz_compare_int(/*n=*/2, /*v0=*/4, /*v1=*/3, 0, 0); break; case 12: syz_errno(/*v=*/1); break; case 13: memcpy((void*)0x20000080, "\xdd\x68\x3c\x97\x17\x07\xa1\x47\xf5\xd7\xce\xf5\x4f\xa2\xb1\xcc\x0e\xa9\x41\xb6\x32\xcc\xb1\x1d\x08\x80\x0d\xb3\x24\xfe\xdc\xf4\x7f\x09\xab\xbf\xa9\x34\x38\x30\x09\x85\x2c\xf3\x8d\xaa\x1a\x9d\x27\x3a", 50); syz_execute_func(/*text=*/0x20000080); break; case 14: syz_exit(/*status=*/4); break; case 15: syz_mmap(/*addr=*/0x20ffd000, /*len=*/0x3000); break; case 16: syz_sleep_ms(/*ms=*/0x83); break; case 17: syz_test_fuzzer1(/*a=*/0xa, /*b=*/0xd, /*c=*/0xd); break; } } int main(void) { syz_mmap(/*addr=*/0x20000000, /*len=*/0x1000000); setup_fault(); for (procid = 0; procid < 4; procid++) { if (fork() == 0) { use_temporary_dir(); do_sandbox_none(); } } sleep(1000000); return 0; } :307:9: error: call to undeclared function 'syscall'; ISO C99 and later do not support implicit function declarations [-Werror,-Wimplicit-function-declaration] res = syscall(SYS_test, /*a=*/0x20000040ul, 0, 0, 0, 0, 0); ^ 1 error generated. compiler invocation: c++ [-o /tmp/syz-executor2621666394 -DGOOS_test=1 -DGOARCH_64=1 -DHOSTGOOS_openbsd=1 -x c - -m64 -lutil -O2 -pthread -Wall -Werror -Wparentheses -Wunused-const-variable -Wframe-larger-than=16384 -Wno-array-bounds -Wno-unused-but-set-variable -Wno-unused-command-line-argument -no-pie -fno-exceptions] --- FAIL: TestGenerate/test/64/2 (1.18s) csource_test.go:150: opts: {Threaded:true Repeat:false RepeatTimes:0 Procs:0 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:false NetDevices:false NetReset:false Cgroups:false BinfmtMisc:false CloseFDs:false KCSAN:false DevlinkPCI:false NicVF:false USB:false VhciInjection:false Wifi:false IEEE802154:false Sysctl:false Swap:false UseTmpDir:true HandleSegv:false Repro:false Trace:false LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}} program: test$r101_producer_recur(&(0x7f0000000040)={&(0x7f0000000000)={0x0}}) (fail_nth: 1) test$r101_consumer(r0) (async) test$int(0x7a, 0xc3, 0x66f5, 0x9, 0x8) (rerun: 4) test$r104_producer(&(0x7f0000000080)=0x0) test$r104_producer(&(0x7f0000000100)=0x0) test$r103_producer_r104_consumer(&(0x7f00000000c0)={0x0, r1}, &(0x7f0000000140)={0x0, r2}) test$r104_producer(&(0x7f0000000180)=0x0) test$r104_producer(&(0x7f0000000200)=0x0) test$r103_producer_r104_consumer(&(0x7f00000001c0)={0x0, r3}, &(0x7f0000000240)={0x0, r4}) test$r101_producer_recur(&(0x7f00000002c0)={&(0x7f0000000280)}) syz_compare(&(0x7f0000000000)='\x00', 0x1, &(0x7f0000000040)=@bf9={0x7, {0x4, 0x6, 0x2}}, 0x4) syz_compare_int$2(0x2, 0x4, 0x3) syz_errno(0x1) syz_execute_func(&(0x7f0000000080)="dd683c971707a147f5d7cef54fa2b1cc0ea941b632ccb11d08800db324fedcf47f09abbfa934383009852cf38daa1a9d273a") syz_exit(0x4) syz_mmap(&(0x7f0000ffd000/0x3000)=nil, 0x3000) syz_sleep_ms(0x83) syz_test_fuzzer1(0xa, 0xd, 0xd) csource_test.go:151: failed to build program: // autogenerated by syzkaller (https://github.com/google/syzkaller) #define _GNU_SOURCE #include #include #include #include #include #include #include #include #include #include #include #include #ifndef SYS_test #define SYS_test 0 #endif static void sleep_ms(uint64_t ms) { usleep(ms * 1000); } static uint64_t current_time_ms(void) { struct timespec ts; if (clock_gettime(CLOCK_MONOTONIC, &ts)) exit(1); return (uint64_t)ts.tv_sec * 1000 + (uint64_t)ts.tv_nsec / 1000000; } static void use_temporary_dir(void) { char tmpdir_template[] = "./syzkaller.XXXXXX"; char* tmpdir = mkdtemp(tmpdir_template); if (!tmpdir) exit(1); if (chmod(tmpdir, 0777)) exit(1); if (chdir(tmpdir)) exit(1); } static int inject_fault(int nth) { return 0; } static void setup_fault() { } static void thread_start(void* (*fn)(void*), void* arg) { pthread_t th; pthread_attr_t attr; pthread_attr_init(&attr); pthread_attr_setstacksize(&attr, 128 << 10); int i = 0; for (; i < 100; i++) { if (pthread_create(&th, &attr, fn, arg) == 0) { pthread_attr_destroy(&attr); return; } if (errno == EAGAIN) { usleep(50); continue; } break; } exit(1); } typedef struct { pthread_mutex_t mu; pthread_cond_t cv; int state; } event_t; static void event_init(event_t* ev) { if (pthread_mutex_init(&ev->mu, 0)) exit(1); if (pthread_cond_init(&ev->cv, 0)) exit(1); ev->state = 0; } static void event_reset(event_t* ev) { ev->state = 0; } static void event_set(event_t* ev) { pthread_mutex_lock(&ev->mu); if (ev->state) exit(1); ev->state = 1; pthread_mutex_unlock(&ev->mu); pthread_cond_broadcast(&ev->cv); } static void event_wait(event_t* ev) { pthread_mutex_lock(&ev->mu); while (!ev->state) pthread_cond_wait(&ev->cv, &ev->mu); pthread_mutex_unlock(&ev->mu); } static int event_isset(event_t* ev) { pthread_mutex_lock(&ev->mu); int res = ev->state; pthread_mutex_unlock(&ev->mu); return res; } static int event_timedwait(event_t* ev, uint64_t timeout) { uint64_t start = current_time_ms(); uint64_t now = start; pthread_mutex_lock(&ev->mu); for (;;) { if (ev->state) break; uint64_t remain = timeout - (now - start); struct timespec ts; ts.tv_sec = remain / 1000; ts.tv_nsec = (remain % 1000) * 1000 * 1000; pthread_cond_timedwait(&ev->cv, &ev->mu, &ts); now = current_time_ms(); if (now - start > timeout) break; } int res = ev->state; pthread_mutex_unlock(&ev->mu); return res; } #define BITMASK(bf_off,bf_len) (((1ull << (bf_len)) - 1) << (bf_off)) #define STORE_BY_BITMASK(type,htobe,addr,val,bf_off,bf_len) *(type*)(addr) = htobe((htobe(*(type*)(addr)) & ~BITMASK((bf_off), (bf_len))) | (((type)(val) << (bf_off)) & BITMASK((bf_off), (bf_len)))) static long syz_mmap(volatile long a0, volatile long a1) { return (long)mmap((void*)a0, a1, PROT_READ | PROT_WRITE, MAP_ANON | MAP_PRIVATE | MAP_FIXED, -1, 0); } static long syz_errno(volatile long v) { errno = v; return v == 0 ? 0 : -1; } static long syz_exit(volatile long status) { _exit(status); return 0; } static long syz_sleep_ms(volatile long ms) { sleep_ms(ms); return 0; } static long syz_compare(volatile long want, volatile long want_len, volatile long got, volatile long got_len) { if (want_len != got_len) { errno = EBADF; goto error; } if (memcmp((void*)want, (void*)got, want_len)) { errno = EINVAL; goto error; } return 0; error: return -1; } static long syz_compare_int(volatile long n, ...) { va_list args; va_start(args, n); long v0 = va_arg(args, long); long v1 = va_arg(args, long); long v2 = va_arg(args, long); long v3 = va_arg(args, long); va_end(args); if (n < 2 || n > 4) return errno = E2BIG, -1; if (n <= 2 && v2 != 0) return errno = EFAULT, -1; if (n <= 3 && v3 != 0) return errno = EFAULT, -1; if (v0 != v1) return errno = EINVAL, -1; if (n > 2 && v0 != v2) return errno = EINVAL, -1; if (n > 3 && v0 != v3) return errno = EINVAL, -1; return 0; } static void loop(); static int do_sandbox_none(void) { loop(); return 0; } static void fake_crash(const char* name) { exit(1); exit(1); } static long syz_test_fuzzer1(volatile long a, volatile long b, volatile long c) { if (a == 1 && b == 1 && c == 1) fake_crash("first bug"); if (a == 1 && b == 2 && c == 3) fake_crash("second bug"); return 0; } static long syz_execute_func(volatile long text) { ((void (*)(void))(text))(); return 0; } struct thread_t { int created, call; event_t ready, done; }; static struct thread_t threads[16]; static void execute_call(int call); static int running; static void* thr(void* arg) { struct thread_t* th = (struct thread_t*)arg; for (;;) { event_wait(&th->ready); event_reset(&th->ready); execute_call(th->call); __atomic_fetch_sub(&running, 1, __ATOMIC_RELAXED); event_set(&th->done); } return 0; } static void loop(void) { int i, call, thread; for (call = 0; call < 18; call++) { for (thread = 0; thread < (int)(sizeof(threads) / sizeof(threads[0])); thread++) { struct thread_t* th = &threads[thread]; if (!th->created) { th->created = 1; event_init(&th->ready); event_init(&th->done); event_set(&th->done); thread_start(thr, th); } if (!event_isset(&th->done)) continue; event_reset(&th->done); th->call = call; __atomic_fetch_add(&running, 1, __ATOMIC_RELAXED); event_set(&th->ready); if (call == 1) break; event_timedwait(&th->done, 50); break; } } for (i = 0; i < 100 && __atomic_load_n(&running, __ATOMIC_RELAXED); i++) sleep_ms(1); } uint64_t r[5] = {0x0, 0x0, 0x0, 0x0, 0x0}; void execute_call(int call) { intptr_t res = 0; switch (call) { case 0: *(uint64_t*)0x20000040 = 0x20000000; inject_fault(1); res = syscall(SYS_test, /*a=*/0x20000040ul, 0, 0, 0, 0, 0); if (res != -1) r[0] = *(uint32_t*)0x20000000; break; case 1: syscall(SYS_test, /*a=*/r[0], 0, 0, 0, 0, 0); break; case 2: syscall(SYS_test, /*a0=*/0x7aul, /*a1=*/0xc3, /*a2=*/0x66f5, /*a3=*/9, /*a4=*/8ul, 0); { int i; for(i = 0; i < 4; i++) { syscall(SYS_test, /*a0=*/0x7aul, /*a1=*/0xc3, /*a2=*/0x66f5, /*a3=*/9, /*a4=*/8ul, 0); } } break; case 3: res = syscall(SYS_test, /*a=*/0x20000080ul, 0, 0, 0, 0, 0); if (res != -1) r[1] = *(uint32_t*)0x20000080; break; case 4: res = syscall(SYS_test, /*a=*/0x20000100ul, 0, 0, 0, 0, 0); if (res != -1) r[2] = *(uint32_t*)0x20000100; break; case 5: *(uint32_t*)0x200000c4 = r[1]; *(uint32_t*)0x20000144 = r[2]; syscall(SYS_test, /*a=*/0x200000c0ul, /*b=*/0x20000140ul, 0, 0, 0, 0); break; case 6: res = syscall(SYS_test, /*a=*/0x20000180ul, 0, 0, 0, 0, 0); if (res != -1) r[3] = *(uint32_t*)0x20000180; break; case 7: res = syscall(SYS_test, /*a=*/0x20000200ul, 0, 0, 0, 0, 0); if (res != -1) r[4] = *(uint32_t*)0x20000200; break; case 8: *(uint32_t*)0x200001c4 = r[3]; *(uint32_t*)0x20000244 = r[4]; syscall(SYS_test, /*a=*/0x200001c0ul, /*b=*/0x20000240ul, 0, 0, 0, 0); break; case 9: *(uint64_t*)0x200002c0 = 0x20000280; syscall(SYS_test, /*a=*/0x200002c0ul, 0, 0, 0, 0, 0); break; case 10: memset((void*)0x20000000, 0, 1); *(uint8_t*)0x20000040 = 7; *(uint8_t*)0x20000042 = 4; STORE_BY_BITMASK(uint16_t, , 0x20000042, 6, 8, 4); STORE_BY_BITMASK(uint16_t, , 0x20000042, 2, 12, 4); syz_compare(/*want=*/0x20000000, /*want_len=*/1, /*got=*/0x20000040, /*got_len=*/4); break; case 11: syz_compare_int(/*n=*/2, /*v0=*/4, /*v1=*/3, 0, 0); break; case 12: syz_errno(/*v=*/1); break; case 13: memcpy((void*)0x20000080, "\xdd\x68\x3c\x97\x17\x07\xa1\x47\xf5\xd7\xce\xf5\x4f\xa2\xb1\xcc\x0e\xa9\x41\xb6\x32\xcc\xb1\x1d\x08\x80\x0d\xb3\x24\xfe\xdc\xf4\x7f\x09\xab\xbf\xa9\x34\x38\x30\x09\x85\x2c\xf3\x8d\xaa\x1a\x9d\x27\x3a", 50); syz_execute_func(/*text=*/0x20000080); break; case 14: syz_exit(/*status=*/4); break; case 15: syz_mmap(/*addr=*/0x20ffd000, /*len=*/0x3000); break; case 16: syz_sleep_ms(/*ms=*/0x83); break; case 17: syz_test_fuzzer1(/*a=*/0xa, /*b=*/0xd, /*c=*/0xd); break; } } int main(void) { syz_mmap(/*addr=*/0x20000000, /*len=*/0x1000000); setup_fault(); use_temporary_dir(); do_sandbox_none(); return 0; } :299:9: error: call to undeclared function 'syscall'; ISO C99 and later do not support implicit function declarations [-Werror,-Wimplicit-function-declaration] res = syscall(SYS_test, /*a=*/0x20000040ul, 0, 0, 0, 0, 0); ^ 1 error generated. compiler invocation: c++ [-o /tmp/syz-executor3116861632 -DGOOS_test=1 -DGOARCH_64=1 -DHOSTGOOS_openbsd=1 -x c - -m64 -lutil -O2 -pthread -Wall -Werror -Wparentheses -Wunused-const-variable -Wframe-larger-than=16384 -Wno-array-bounds -Wno-unused-but-set-variable -Wno-unused-command-line-argument -no-pie -fno-exceptions] --- FAIL: TestGenerate/test/64/6 (1.24s) csource_test.go:150: opts: {Threaded:true Repeat:true RepeatTimes:0 Procs:0 Slowdown:10 Sandbox:none SandboxArg:0 Leak:false NetInjection:false NetDevices:false NetReset:false Cgroups:false BinfmtMisc:false CloseFDs:false KCSAN:false DevlinkPCI:false NicVF:false USB:false VhciInjection:false Wifi:false IEEE802154:false Sysctl:false Swap:false UseTmpDir:true HandleSegv:false Repro:false Trace:false LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}} program: test$r101_producer_recur(&(0x7f0000000040)={&(0x7f0000000000)={0x0}}) (fail_nth: 1) test$r101_consumer(r0) (async) test$int(0x7a, 0xc3, 0x66f5, 0x9, 0x8) (rerun: 4) test$r104_producer(&(0x7f0000000080)=0x0) test$r104_producer(&(0x7f0000000100)=0x0) test$r103_producer_r104_consumer(&(0x7f00000000c0)={0x0, r1}, &(0x7f0000000140)={0x0, r2}) test$r104_producer(&(0x7f0000000180)=0x0) test$r104_producer(&(0x7f0000000200)=0x0) test$r103_producer_r104_consumer(&(0x7f00000001c0)={0x0, r3}, &(0x7f0000000240)={0x0, r4}) test$r101_producer_recur(&(0x7f00000002c0)={&(0x7f0000000280)}) syz_compare(&(0x7f0000000000)='\x00', 0x1, &(0x7f0000000040)=@bf9={0x7, {0x4, 0x6, 0x2}}, 0x4) syz_compare_int$2(0x2, 0x4, 0x3) syz_errno(0x1) syz_execute_func(&(0x7f0000000080)="dd683c971707a147f5d7cef54fa2b1cc0ea941b632ccb11d08800db324fedcf47f09abbfa934383009852cf38daa1a9d273a") syz_exit(0x4) syz_mmap(&(0x7f0000ffd000/0x3000)=nil, 0x3000) syz_sleep_ms(0x83) syz_test_fuzzer1(0xa, 0xd, 0xd) csource_test.go:151: failed to build program: // autogenerated by syzkaller (https://github.com/google/syzkaller) #define _GNU_SOURCE #include #include #include #include #include #include #include #include #include #include #include #include #ifndef SYS_test #define SYS_test 0 #endif static void sleep_ms(uint64_t ms) { usleep(ms * 1000); } static uint64_t current_time_ms(void) { struct timespec ts; if (clock_gettime(CLOCK_MONOTONIC, &ts)) exit(1); return (uint64_t)ts.tv_sec * 1000 + (uint64_t)ts.tv_nsec / 1000000; } static void use_temporary_dir(void) { char tmpdir_template[] = "./syzkaller.XXXXXX"; char* tmpdir = mkdtemp(tmpdir_template); if (!tmpdir) exit(1); if (chmod(tmpdir, 0777)) exit(1); if (chdir(tmpdir)) exit(1); } static int inject_fault(int nth) { return 0; } static void setup_fault() { } static void thread_start(void* (*fn)(void*), void* arg) { pthread_t th; pthread_attr_t attr; pthread_attr_init(&attr); pthread_attr_setstacksize(&attr, 128 << 10); int i = 0; for (; i < 100; i++) { if (pthread_create(&th, &attr, fn, arg) == 0) { pthread_attr_destroy(&attr); return; } if (errno == EAGAIN) { usleep(50); continue; } break; } exit(1); } typedef struct { pthread_mutex_t mu; pthread_cond_t cv; int state; } event_t; static void event_init(event_t* ev) { if (pthread_mutex_init(&ev->mu, 0)) exit(1); if (pthread_cond_init(&ev->cv, 0)) exit(1); ev->state = 0; } static void event_reset(event_t* ev) { ev->state = 0; } static void event_set(event_t* ev) { pthread_mutex_lock(&ev->mu); if (ev->state) exit(1); ev->state = 1; pthread_mutex_unlock(&ev->mu); pthread_cond_broadcast(&ev->cv); } static void event_wait(event_t* ev) { pthread_mutex_lock(&ev->mu); while (!ev->state) pthread_cond_wait(&ev->cv, &ev->mu); pthread_mutex_unlock(&ev->mu); } static int event_isset(event_t* ev) { pthread_mutex_lock(&ev->mu); int res = ev->state; pthread_mutex_unlock(&ev->mu); return res; } static int event_timedwait(event_t* ev, uint64_t timeout) { uint64_t start = current_time_ms(); uint64_t now = start; pthread_mutex_lock(&ev->mu); for (;;) { if (ev->state) break; uint64_t remain = timeout - (now - start); struct timespec ts; ts.tv_sec = remain / 1000; ts.tv_nsec = (remain % 1000) * 1000 * 1000; pthread_cond_timedwait(&ev->cv, &ev->mu, &ts); now = current_time_ms(); if (now - start > timeout) break; } int res = ev->state; pthread_mutex_unlock(&ev->mu); return res; } #define BITMASK(bf_off,bf_len) (((1ull << (bf_len)) - 1) << (bf_off)) #define STORE_BY_BITMASK(type,htobe,addr,val,bf_off,bf_len) *(type*)(addr) = htobe((htobe(*(type*)(addr)) & ~BITMASK((bf_off), (bf_len))) | (((type)(val) << (bf_off)) & BITMASK((bf_off), (bf_len)))) static long syz_mmap(volatile long a0, volatile long a1) { return (long)mmap((void*)a0, a1, PROT_READ | PROT_WRITE, MAP_ANON | MAP_PRIVATE | MAP_FIXED, -1, 0); } static long syz_errno(volatile long v) { errno = v; return v == 0 ? 0 : -1; } static long syz_exit(volatile long status) { _exit(status); return 0; } static long syz_sleep_ms(volatile long ms) { sleep_ms(ms); return 0; } static long syz_compare(volatile long want, volatile long want_len, volatile long got, volatile long got_len) { if (want_len != got_len) { errno = EBADF; goto error; } if (memcmp((void*)want, (void*)got, want_len)) { errno = EINVAL; goto error; } return 0; error: return -1; } static long syz_compare_int(volatile long n, ...) { va_list args; va_start(args, n); long v0 = va_arg(args, long); long v1 = va_arg(args, long); long v2 = va_arg(args, long); long v3 = va_arg(args, long); va_end(args); if (n < 2 || n > 4) return errno = E2BIG, -1; if (n <= 2 && v2 != 0) return errno = EFAULT, -1; if (n <= 3 && v3 != 0) return errno = EFAULT, -1; if (v0 != v1) return errno = EINVAL, -1; if (n > 2 && v0 != v2) return errno = EINVAL, -1; if (n > 3 && v0 != v3) return errno = EINVAL, -1; return 0; } static void loop(); static int do_sandbox_none(void) { loop(); return 0; } static void fake_crash(const char* name) { exit(1); exit(1); } static long syz_test_fuzzer1(volatile long a, volatile long b, volatile long c) { if (a == 1 && b == 1 && c == 1) fake_crash("first bug"); if (a == 1 && b == 2 && c == 3) fake_crash("second bug"); return 0; } static long syz_execute_func(volatile long text) { ((void (*)(void))(text))(); return 0; } struct thread_t { int created, call; event_t ready, done; }; static struct thread_t threads[16]; static void execute_call(int call); static int running; static void* thr(void* arg) { struct thread_t* th = (struct thread_t*)arg; for (;;) { event_wait(&th->ready); event_reset(&th->ready); execute_call(th->call); __atomic_fetch_sub(&running, 1, __ATOMIC_RELAXED); event_set(&th->done); } return 0; } static void execute_one(void) { int i, call, thread; for (call = 0; call < 18; call++) { for (thread = 0; thread < (int)(sizeof(threads) / sizeof(threads[0])); thread++) { struct thread_t* th = &threads[thread]; if (!th->created) { th->created = 1; event_init(&th->ready); event_init(&th->done); event_set(&th->done); thread_start(thr, th); } if (!event_isset(&th->done)) continue; event_reset(&th->done); th->call = call; __atomic_fetch_add(&running, 1, __ATOMIC_RELAXED); event_set(&th->ready); if (call == 1) break; event_timedwait(&th->done, 500); break; } } for (i = 0; i < 100 && __atomic_load_n(&running, __ATOMIC_RELAXED); i++) sleep_ms(1); } static void execute_one(void); static void loop(void) { execute_one(); } uint64_t r[5] = {0x0, 0x0, 0x0, 0x0, 0x0}; void execute_call(int call) { intptr_t res = 0; switch (call) { case 0: *(uint64_t*)0x20000040 = 0x20000000; inject_fault(1); res = syscall(SYS_test, /*a=*/0x20000040ul, 0, 0, 0, 0, 0); if (res != -1) r[0] = *(uint32_t*)0x20000000; break; case 1: syscall(SYS_test, /*a=*/r[0], 0, 0, 0, 0, 0); break; case 2: syscall(SYS_test, /*a0=*/0x7aul, /*a1=*/0xc3, /*a2=*/0x66f5, /*a3=*/9, /*a4=*/8ul, 0); { int i; for(i = 0; i < 4; i++) { syscall(SYS_test, /*a0=*/0x7aul, /*a1=*/0xc3, /*a2=*/0x66f5, /*a3=*/9, /*a4=*/8ul, 0); } } break; case 3: res = syscall(SYS_test, /*a=*/0x20000080ul, 0, 0, 0, 0, 0); if (res != -1) r[1] = *(uint32_t*)0x20000080; break; case 4: res = syscall(SYS_test, /*a=*/0x20000100ul, 0, 0, 0, 0, 0); if (res != -1) r[2] = *(uint32_t*)0x20000100; break; case 5: *(uint32_t*)0x200000c4 = r[1]; *(uint32_t*)0x20000144 = r[2]; syscall(SYS_test, /*a=*/0x200000c0ul, /*b=*/0x20000140ul, 0, 0, 0, 0); break; case 6: res = syscall(SYS_test, /*a=*/0x20000180ul, 0, 0, 0, 0, 0); if (res != -1) r[3] = *(uint32_t*)0x20000180; break; case 7: res = syscall(SYS_test, /*a=*/0x20000200ul, 0, 0, 0, 0, 0); if (res != -1) r[4] = *(uint32_t*)0x20000200; break; case 8: *(uint32_t*)0x200001c4 = r[3]; *(uint32_t*)0x20000244 = r[4]; syscall(SYS_test, /*a=*/0x200001c0ul, /*b=*/0x20000240ul, 0, 0, 0, 0); break; case 9: *(uint64_t*)0x200002c0 = 0x20000280; syscall(SYS_test, /*a=*/0x200002c0ul, 0, 0, 0, 0, 0); break; case 10: memset((void*)0x20000000, 0, 1); *(uint8_t*)0x20000040 = 7; *(uint8_t*)0x20000042 = 4; STORE_BY_BITMASK(uint16_t, , 0x20000042, 6, 8, 4); STORE_BY_BITMASK(uint16_t, , 0x20000042, 2, 12, 4); syz_compare(/*want=*/0x20000000, /*want_len=*/1, /*got=*/0x20000040, /*got_len=*/4); break; case 11: syz_compare_int(/*n=*/2, /*v0=*/4, /*v1=*/3, 0, 0); break; case 12: syz_errno(/*v=*/1); break; case 13: memcpy((void*)0x20000080, "\xdd\x68\x3c\x97\x17\x07\xa1\x47\xf5\xd7\xce\xf5\x4f\xa2\xb1\xcc\x0e\xa9\x41\xb6\x32\xcc\xb1\x1d\x08\x80\x0d\xb3\x24\xfe\xdc\xf4\x7f\x09\xab\xbf\xa9\x34\x38\x30\x09\x85\x2c\xf3\x8d\xaa\x1a\x9d\x27\x3a", 50); syz_execute_func(/*text=*/0x20000080); break; case 14: syz_exit(/*status=*/4); break; case 15: syz_mmap(/*addr=*/0x20ffd000, /*len=*/0x3000); break; case 16: syz_sleep_ms(/*ms=*/0x83); break; case 17: syz_test_fuzzer1(/*a=*/0xa, /*b=*/0xd, /*c=*/0xd); break; } } int main(void) { syz_mmap(/*addr=*/0x20000000, /*len=*/0x1000000); setup_fault(); use_temporary_dir(); do_sandbox_none(); return 0; } :305:9: error: call to undeclared function 'syscall'; ISO C99 and later do not support implicit function declarations [-Werror,-Wimplicit-function-declaration] res = syscall(SYS_test, /*a=*/0x20000040ul, 0, 0, 0, 0, 0); ^ 1 error generated. compiler invocation: c++ [-o /tmp/syz-executor2786968245 -DGOOS_test=1 -DGOARCH_64=1 -DHOSTGOOS_openbsd=1 -x c - -m64 -lutil -O2 -pthread -Wall -Werror -Wparentheses -Wunused-const-variable -Wframe-larger-than=16384 -Wno-array-bounds -Wno-unused-but-set-variable -Wno-unused-command-line-argument -no-pie -fno-exceptions] --- FAIL: TestGenerate/test/64/12 (1.26s) csource_test.go:150: opts: {Threaded:true Repeat:true RepeatTimes:0 Procs:0 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:false NetDevices:false NetReset:false Cgroups:false BinfmtMisc:false CloseFDs:false KCSAN:false DevlinkPCI:false NicVF:false USB:false VhciInjection:false Wifi:false IEEE802154:false Sysctl:false Swap:false UseTmpDir:true HandleSegv:false Repro:true Trace:false LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}} program: test$r101_producer_recur(&(0x7f0000000040)={&(0x7f0000000000)={0x0}}) (fail_nth: 1) test$r101_consumer(r0) (async) test$int(0x7a, 0xc3, 0x66f5, 0x9, 0x8) (rerun: 4) test$r104_producer(&(0x7f0000000080)=0x0) test$r104_producer(&(0x7f0000000100)=0x0) test$r103_producer_r104_consumer(&(0x7f00000000c0)={0x0, r1}, &(0x7f0000000140)={0x0, r2}) test$r104_producer(&(0x7f0000000180)=0x0) test$r104_producer(&(0x7f0000000200)=0x0) test$r103_producer_r104_consumer(&(0x7f00000001c0)={0x0, r3}, &(0x7f0000000240)={0x0, r4}) test$r101_producer_recur(&(0x7f00000002c0)={&(0x7f0000000280)}) syz_compare(&(0x7f0000000000)='\x00', 0x1, &(0x7f0000000040)=@bf9={0x7, {0x4, 0x6, 0x2}}, 0x4) syz_compare_int$2(0x2, 0x4, 0x3) syz_errno(0x1) syz_execute_func(&(0x7f0000000080)="dd683c971707a147f5d7cef54fa2b1cc0ea941b632ccb11d08800db324fedcf47f09abbfa934383009852cf38daa1a9d273a") syz_exit(0x4) syz_mmap(&(0x7f0000ffd000/0x3000)=nil, 0x3000) syz_sleep_ms(0x83) syz_test_fuzzer1(0xa, 0xd, 0xd) csource_test.go:151: failed to build program: // autogenerated by syzkaller (https://github.com/google/syzkaller) #define _GNU_SOURCE #include #include #include #include #include #include #include #include #include #include #include #include #ifndef SYS_test #define SYS_test 0 #endif static void sleep_ms(uint64_t ms) { usleep(ms * 1000); } static uint64_t current_time_ms(void) { struct timespec ts; if (clock_gettime(CLOCK_MONOTONIC, &ts)) exit(1); return (uint64_t)ts.tv_sec * 1000 + (uint64_t)ts.tv_nsec / 1000000; } static void use_temporary_dir(void) { char tmpdir_template[] = "./syzkaller.XXXXXX"; char* tmpdir = mkdtemp(tmpdir_template); if (!tmpdir) exit(1); if (chmod(tmpdir, 0777)) exit(1); if (chdir(tmpdir)) exit(1); } static int inject_fault(int nth) { return 0; } static void setup_fault() { } static void thread_start(void* (*fn)(void*), void* arg) { pthread_t th; pthread_attr_t attr; pthread_attr_init(&attr); pthread_attr_setstacksize(&attr, 128 << 10); int i = 0; for (; i < 100; i++) { if (pthread_create(&th, &attr, fn, arg) == 0) { pthread_attr_destroy(&attr); return; } if (errno == EAGAIN) { usleep(50); continue; } break; } exit(1); } typedef struct { pthread_mutex_t mu; pthread_cond_t cv; int state; } event_t; static void event_init(event_t* ev) { if (pthread_mutex_init(&ev->mu, 0)) exit(1); if (pthread_cond_init(&ev->cv, 0)) exit(1); ev->state = 0; } static void event_reset(event_t* ev) { ev->state = 0; } static void event_set(event_t* ev) { pthread_mutex_lock(&ev->mu); if (ev->state) exit(1); ev->state = 1; pthread_mutex_unlock(&ev->mu); pthread_cond_broadcast(&ev->cv); } static void event_wait(event_t* ev) { pthread_mutex_lock(&ev->mu); while (!ev->state) pthread_cond_wait(&ev->cv, &ev->mu); pthread_mutex_unlock(&ev->mu); } static int event_isset(event_t* ev) { pthread_mutex_lock(&ev->mu); int res = ev->state; pthread_mutex_unlock(&ev->mu); return res; } static int event_timedwait(event_t* ev, uint64_t timeout) { uint64_t start = current_time_ms(); uint64_t now = start; pthread_mutex_lock(&ev->mu); for (;;) { if (ev->state) break; uint64_t remain = timeout - (now - start); struct timespec ts; ts.tv_sec = remain / 1000; ts.tv_nsec = (remain % 1000) * 1000 * 1000; pthread_cond_timedwait(&ev->cv, &ev->mu, &ts); now = current_time_ms(); if (now - start > timeout) break; } int res = ev->state; pthread_mutex_unlock(&ev->mu); return res; } #define BITMASK(bf_off,bf_len) (((1ull << (bf_len)) - 1) << (bf_off)) #define STORE_BY_BITMASK(type,htobe,addr,val,bf_off,bf_len) *(type*)(addr) = htobe((htobe(*(type*)(addr)) & ~BITMASK((bf_off), (bf_len))) | (((type)(val) << (bf_off)) & BITMASK((bf_off), (bf_len)))) static long syz_mmap(volatile long a0, volatile long a1) { return (long)mmap((void*)a0, a1, PROT_READ | PROT_WRITE, MAP_ANON | MAP_PRIVATE | MAP_FIXED, -1, 0); } static long syz_errno(volatile long v) { errno = v; return v == 0 ? 0 : -1; } static long syz_exit(volatile long status) { _exit(status); return 0; } static long syz_sleep_ms(volatile long ms) { sleep_ms(ms); return 0; } static long syz_compare(volatile long want, volatile long want_len, volatile long got, volatile long got_len) { if (want_len != got_len) { errno = EBADF; goto error; } if (memcmp((void*)want, (void*)got, want_len)) { errno = EINVAL; goto error; } return 0; error: return -1; } static long syz_compare_int(volatile long n, ...) { va_list args; va_start(args, n); long v0 = va_arg(args, long); long v1 = va_arg(args, long); long v2 = va_arg(args, long); long v3 = va_arg(args, long); va_end(args); if (n < 2 || n > 4) return errno = E2BIG, -1; if (n <= 2 && v2 != 0) return errno = EFAULT, -1; if (n <= 3 && v3 != 0) return errno = EFAULT, -1; if (v0 != v1) return errno = EINVAL, -1; if (n > 2 && v0 != v2) return errno = EINVAL, -1; if (n > 3 && v0 != v3) return errno = EINVAL, -1; return 0; } static void loop(); static int do_sandbox_none(void) { loop(); return 0; } static void fake_crash(const char* name) { exit(1); exit(1); } static long syz_test_fuzzer1(volatile long a, volatile long b, volatile long c) { if (a == 1 && b == 1 && c == 1) fake_crash("first bug"); if (a == 1 && b == 2 && c == 3) fake_crash("second bug"); return 0; } static long syz_execute_func(volatile long text) { ((void (*)(void))(text))(); return 0; } struct thread_t { int created, call; event_t ready, done; }; static struct thread_t threads[16]; static void execute_call(int call); static int running; static void* thr(void* arg) { struct thread_t* th = (struct thread_t*)arg; for (;;) { event_wait(&th->ready); event_reset(&th->ready); execute_call(th->call); __atomic_fetch_sub(&running, 1, __ATOMIC_RELAXED); event_set(&th->done); } return 0; } static void execute_one(void) { if (write(1, "executing program\n", sizeof("executing program\n") - 1)) { } int i, call, thread; for (call = 0; call < 18; call++) { for (thread = 0; thread < (int)(sizeof(threads) / sizeof(threads[0])); thread++) { struct thread_t* th = &threads[thread]; if (!th->created) { th->created = 1; event_init(&th->ready); event_init(&th->done); event_set(&th->done); thread_start(thr, th); } if (!event_isset(&th->done)) continue; event_reset(&th->done); th->call = call; __atomic_fetch_add(&running, 1, __ATOMIC_RELAXED); event_set(&th->ready); if (call == 1) break; event_timedwait(&th->done, 50); break; } } for (i = 0; i < 100 && __atomic_load_n(&running, __ATOMIC_RELAXED); i++) sleep_ms(1); } static void execute_one(void); static void loop(void) { execute_one(); } uint64_t r[5] = {0x0, 0x0, 0x0, 0x0, 0x0}; void execute_call(int call) { intptr_t res = 0; switch (call) { case 0: *(uint64_t*)0x20000040 = 0x20000000; inject_fault(1); res = syscall(SYS_test, /*a=*/0x20000040ul, 0, 0, 0, 0, 0); if (res != -1) r[0] = *(uint32_t*)0x20000000; break; case 1: syscall(SYS_test, /*a=*/r[0], 0, 0, 0, 0, 0); break; case 2: syscall(SYS_test, /*a0=*/0x7aul, /*a1=*/0xc3, /*a2=*/0x66f5, /*a3=*/9, /*a4=*/8ul, 0); { int i; for(i = 0; i < 4; i++) { syscall(SYS_test, /*a0=*/0x7aul, /*a1=*/0xc3, /*a2=*/0x66f5, /*a3=*/9, /*a4=*/8ul, 0); } } break; case 3: res = syscall(SYS_test, /*a=*/0x20000080ul, 0, 0, 0, 0, 0); if (res != -1) r[1] = *(uint32_t*)0x20000080; break; case 4: res = syscall(SYS_test, /*a=*/0x20000100ul, 0, 0, 0, 0, 0); if (res != -1) r[2] = *(uint32_t*)0x20000100; break; case 5: *(uint32_t*)0x200000c4 = r[1]; *(uint32_t*)0x20000144 = r[2]; syscall(SYS_test, /*a=*/0x200000c0ul, /*b=*/0x20000140ul, 0, 0, 0, 0); break; case 6: res = syscall(SYS_test, /*a=*/0x20000180ul, 0, 0, 0, 0, 0); if (res != -1) r[3] = *(uint32_t*)0x20000180; break; case 7: res = syscall(SYS_test, /*a=*/0x20000200ul, 0, 0, 0, 0, 0); if (res != -1) r[4] = *(uint32_t*)0x20000200; break; case 8: *(uint32_t*)0x200001c4 = r[3]; *(uint32_t*)0x20000244 = r[4]; syscall(SYS_test, /*a=*/0x200001c0ul, /*b=*/0x20000240ul, 0, 0, 0, 0); break; case 9: *(uint64_t*)0x200002c0 = 0x20000280; syscall(SYS_test, /*a=*/0x200002c0ul, 0, 0, 0, 0, 0); break; case 10: memset((void*)0x20000000, 0, 1); *(uint8_t*)0x20000040 = 7; *(uint8_t*)0x20000042 = 4; STORE_BY_BITMASK(uint16_t, , 0x20000042, 6, 8, 4); STORE_BY_BITMASK(uint16_t, , 0x20000042, 2, 12, 4); syz_compare(/*want=*/0x20000000, /*want_len=*/1, /*got=*/0x20000040, /*got_len=*/4); break; case 11: syz_compare_int(/*n=*/2, /*v0=*/4, /*v1=*/3, 0, 0); break; case 12: syz_errno(/*v=*/1); break; case 13: memcpy((void*)0x20000080, "\xdd\x68\x3c\x97\x17\x07\xa1\x47\xf5\xd7\xce\xf5\x4f\xa2\xb1\xcc\x0e\xa9\x41\xb6\x32\xcc\xb1\x1d\x08\x80\x0d\xb3\x24\xfe\xdc\xf4\x7f\x09\xab\xbf\xa9\x34\x38\x30\x09\x85\x2c\xf3\x8d\xaa\x1a\x9d\x27\x3a", 50); syz_execute_func(/*text=*/0x20000080); break; case 14: syz_exit(/*status=*/4); break; case 15: syz_mmap(/*addr=*/0x20ffd000, /*len=*/0x3000); break; case 16: syz_sleep_ms(/*ms=*/0x83); break; case 17: syz_test_fuzzer1(/*a=*/0xa, /*b=*/0xd, /*c=*/0xd); break; } } int main(void) { syz_mmap(/*addr=*/0x20000000, /*len=*/0x1000000); setup_fault(); use_temporary_dir(); do_sandbox_none(); return 0; } :307:9: error: call to undeclared function 'syscall'; ISO C99 and later do not support implicit function declarations [-Werror,-Wimplicit-function-declaration] res = syscall(SYS_test, /*a=*/0x20000040ul, 0, 0, 0, 0, 0); ^ 1 error generated. compiler invocation: c++ [-o /tmp/syz-executor131943837 -DGOOS_test=1 -DGOARCH_64=1 -DHOSTGOOS_openbsd=1 -x c - -m64 -lutil -O2 -pthread -Wall -Werror -Wparentheses -Wunused-const-variable -Wframe-larger-than=16384 -Wno-array-bounds -Wno-unused-but-set-variable -Wno-unused-command-line-argument -no-pie -fno-exceptions] --- FAIL: TestGenerate/test/64/1 (0.97s) csource_test.go:150: opts: {Threaded:true Repeat:true RepeatTimes:0 Procs:0 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:false NetDevices:false NetReset:false Cgroups:false BinfmtMisc:false CloseFDs:false KCSAN:false DevlinkPCI:false NicVF:false USB:false VhciInjection:false Wifi:false IEEE802154:false Sysctl:false Swap:false UseTmpDir:true HandleSegv:false Repro:false Trace:false LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}} program: test$r101_producer_recur(&(0x7f0000000040)={&(0x7f0000000000)={0x0}}) (fail_nth: 1) test$r101_consumer(r0) (async) test$int(0x7a, 0xc3, 0x66f5, 0x9, 0x8) (rerun: 4) test$r104_producer(&(0x7f0000000080)=0x0) test$r104_producer(&(0x7f0000000100)=0x0) test$r103_producer_r104_consumer(&(0x7f00000000c0)={0x0, r1}, &(0x7f0000000140)={0x0, r2}) test$r104_producer(&(0x7f0000000180)=0x0) test$r104_producer(&(0x7f0000000200)=0x0) test$r103_producer_r104_consumer(&(0x7f00000001c0)={0x0, r3}, &(0x7f0000000240)={0x0, r4}) test$r101_producer_recur(&(0x7f00000002c0)={&(0x7f0000000280)}) syz_compare(&(0x7f0000000000)='\x00', 0x1, &(0x7f0000000040)=@bf9={0x7, {0x4, 0x6, 0x2}}, 0x4) syz_compare_int$2(0x2, 0x4, 0x3) syz_errno(0x1) syz_execute_func(&(0x7f0000000080)="dd683c971707a147f5d7cef54fa2b1cc0ea941b632ccb11d08800db324fedcf47f09abbfa934383009852cf38daa1a9d273a") syz_exit(0x4) syz_mmap(&(0x7f0000ffd000/0x3000)=nil, 0x3000) syz_sleep_ms(0x83) syz_test_fuzzer1(0xa, 0xd, 0xd) csource_test.go:151: failed to build program: // autogenerated by syzkaller (https://github.com/google/syzkaller) #define _GNU_SOURCE #include #include #include #include #include #include #include #include #include #include #include #include #ifndef SYS_test #define SYS_test 0 #endif static void sleep_ms(uint64_t ms) { usleep(ms * 1000); } static uint64_t current_time_ms(void) { struct timespec ts; if (clock_gettime(CLOCK_MONOTONIC, &ts)) exit(1); return (uint64_t)ts.tv_sec * 1000 + (uint64_t)ts.tv_nsec / 1000000; } static void use_temporary_dir(void) { char tmpdir_template[] = "./syzkaller.XXXXXX"; char* tmpdir = mkdtemp(tmpdir_template); if (!tmpdir) exit(1); if (chmod(tmpdir, 0777)) exit(1); if (chdir(tmpdir)) exit(1); } static int inject_fault(int nth) { return 0; } static void setup_fault() { } static void thread_start(void* (*fn)(void*), void* arg) { pthread_t th; pthread_attr_t attr; pthread_attr_init(&attr); pthread_attr_setstacksize(&attr, 128 << 10); int i = 0; for (; i < 100; i++) { if (pthread_create(&th, &attr, fn, arg) == 0) { pthread_attr_destroy(&attr); return; } if (errno == EAGAIN) { usleep(50); continue; } break; } exit(1); } typedef struct { pthread_mutex_t mu; pthread_cond_t cv; int state; } event_t; static void event_init(event_t* ev) { if (pthread_mutex_init(&ev->mu, 0)) exit(1); if (pthread_cond_init(&ev->cv, 0)) exit(1); ev->state = 0; } static void event_reset(event_t* ev) { ev->state = 0; } static void event_set(event_t* ev) { pthread_mutex_lock(&ev->mu); if (ev->state) exit(1); ev->state = 1; pthread_mutex_unlock(&ev->mu); pthread_cond_broadcast(&ev->cv); } static void event_wait(event_t* ev) { pthread_mutex_lock(&ev->mu); while (!ev->state) pthread_cond_wait(&ev->cv, &ev->mu); pthread_mutex_unlock(&ev->mu); } static int event_isset(event_t* ev) { pthread_mutex_lock(&ev->mu); int res = ev->state; pthread_mutex_unlock(&ev->mu); return res; } static int event_timedwait(event_t* ev, uint64_t timeout) { uint64_t start = current_time_ms(); uint64_t now = start; pthread_mutex_lock(&ev->mu); for (;;) { if (ev->state) break; uint64_t remain = timeout - (now - start); struct timespec ts; ts.tv_sec = remain / 1000; ts.tv_nsec = (remain % 1000) * 1000 * 1000; pthread_cond_timedwait(&ev->cv, &ev->mu, &ts); now = current_time_ms(); if (now - start > timeout) break; } int res = ev->state; pthread_mutex_unlock(&ev->mu); return res; } #define BITMASK(bf_off,bf_len) (((1ull << (bf_len)) - 1) << (bf_off)) #define STORE_BY_BITMASK(type,htobe,addr,val,bf_off,bf_len) *(type*)(addr) = htobe((htobe(*(type*)(addr)) & ~BITMASK((bf_off), (bf_len))) | (((type)(val) << (bf_off)) & BITMASK((bf_off), (bf_len)))) static long syz_mmap(volatile long a0, volatile long a1) { return (long)mmap((void*)a0, a1, PROT_READ | PROT_WRITE, MAP_ANON | MAP_PRIVATE | MAP_FIXED, -1, 0); } static long syz_errno(volatile long v) { errno = v; return v == 0 ? 0 : -1; } static long syz_exit(volatile long status) { _exit(status); return 0; } static long syz_sleep_ms(volatile long ms) { sleep_ms(ms); return 0; } static long syz_compare(volatile long want, volatile long want_len, volatile long got, volatile long got_len) { if (want_len != got_len) { errno = EBADF; goto error; } if (memcmp((void*)want, (void*)got, want_len)) { errno = EINVAL; goto error; } return 0; error: return -1; } static long syz_compare_int(volatile long n, ...) { va_list args; va_start(args, n); long v0 = va_arg(args, long); long v1 = va_arg(args, long); long v2 = va_arg(args, long); long v3 = va_arg(args, long); va_end(args); if (n < 2 || n > 4) return errno = E2BIG, -1; if (n <= 2 && v2 != 0) return errno = EFAULT, -1; if (n <= 3 && v3 != 0) return errno = EFAULT, -1; if (v0 != v1) return errno = EINVAL, -1; if (n > 2 && v0 != v2) return errno = EINVAL, -1; if (n > 3 && v0 != v3) return errno = EINVAL, -1; return 0; } static void loop(); static int do_sandbox_none(void) { loop(); return 0; } static void fake_crash(const char* name) { exit(1); exit(1); } static long syz_test_fuzzer1(volatile long a, volatile long b, volatile long c) { if (a == 1 && b == 1 && c == 1) fake_crash("first bug"); if (a == 1 && b == 2 && c == 3) fake_crash("second bug"); return 0; } static long syz_execute_func(volatile long text) { ((void (*)(void))(text))(); return 0; } struct thread_t { int created, call; event_t ready, done; }; static struct thread_t threads[16]; static void execute_call(int call); static int running; static void* thr(void* arg) { struct thread_t* th = (struct thread_t*)arg; for (;;) { event_wait(&th->ready); event_reset(&th->ready); execute_call(th->call); __atomic_fetch_sub(&running, 1, __ATOMIC_RELAXED); event_set(&th->done); } return 0; } static void execute_one(void) { int i, call, thread; for (call = 0; call < 18; call++) { for (thread = 0; thread < (int)(sizeof(threads) / sizeof(threads[0])); thread++) { struct thread_t* th = &threads[thread]; if (!th->created) { th->created = 1; event_init(&th->ready); event_init(&th->done); event_set(&th->done); thread_start(thr, th); } if (!event_isset(&th->done)) continue; event_reset(&th->done); th->call = call; __atomic_fetch_add(&running, 1, __ATOMIC_RELAXED); event_set(&th->ready); if (call == 1) break; event_timedwait(&th->done, 50); break; } } for (i = 0; i < 100 && __atomic_load_n(&running, __ATOMIC_RELAXED); i++) sleep_ms(1); } static void execute_one(void); static void loop(void) { execute_one(); } uint64_t r[5] = {0x0, 0x0, 0x0, 0x0, 0x0}; void execute_call(int call) { intptr_t res = 0; switch (call) { case 0: *(uint64_t*)0x20000040 = 0x20000000; inject_fault(1); res = syscall(SYS_test, /*a=*/0x20000040ul, 0, 0, 0, 0, 0); if (res != -1) r[0] = *(uint32_t*)0x20000000; break; case 1: syscall(SYS_test, /*a=*/r[0], 0, 0, 0, 0, 0); break; case 2: syscall(SYS_test, /*a0=*/0x7aul, /*a1=*/0xc3, /*a2=*/0x66f5, /*a3=*/9, /*a4=*/8ul, 0); { int i; for(i = 0; i < 4; i++) { syscall(SYS_test, /*a0=*/0x7aul, /*a1=*/0xc3, /*a2=*/0x66f5, /*a3=*/9, /*a4=*/8ul, 0); } } break; case 3: res = syscall(SYS_test, /*a=*/0x20000080ul, 0, 0, 0, 0, 0); if (res != -1) r[1] = *(uint32_t*)0x20000080; break; case 4: res = syscall(SYS_test, /*a=*/0x20000100ul, 0, 0, 0, 0, 0); if (res != -1) r[2] = *(uint32_t*)0x20000100; break; case 5: *(uint32_t*)0x200000c4 = r[1]; *(uint32_t*)0x20000144 = r[2]; syscall(SYS_test, /*a=*/0x200000c0ul, /*b=*/0x20000140ul, 0, 0, 0, 0); break; case 6: res = syscall(SYS_test, /*a=*/0x20000180ul, 0, 0, 0, 0, 0); if (res != -1) r[3] = *(uint32_t*)0x20000180; break; case 7: res = syscall(SYS_test, /*a=*/0x20000200ul, 0, 0, 0, 0, 0); if (res != -1) r[4] = *(uint32_t*)0x20000200; break; case 8: *(uint32_t*)0x200001c4 = r[3]; *(uint32_t*)0x20000244 = r[4]; syscall(SYS_test, /*a=*/0x200001c0ul, /*b=*/0x20000240ul, 0, 0, 0, 0); break; case 9: *(uint64_t*)0x200002c0 = 0x20000280; syscall(SYS_test, /*a=*/0x200002c0ul, 0, 0, 0, 0, 0); break; case 10: memset((void*)0x20000000, 0, 1); *(uint8_t*)0x20000040 = 7; *(uint8_t*)0x20000042 = 4; STORE_BY_BITMASK(uint16_t, , 0x20000042, 6, 8, 4); STORE_BY_BITMASK(uint16_t, , 0x20000042, 2, 12, 4); syz_compare(/*want=*/0x20000000, /*want_len=*/1, /*got=*/0x20000040, /*got_len=*/4); break; case 11: syz_compare_int(/*n=*/2, /*v0=*/4, /*v1=*/3, 0, 0); break; case 12: syz_errno(/*v=*/1); break; case 13: memcpy((void*)0x20000080, "\xdd\x68\x3c\x97\x17\x07\xa1\x47\xf5\xd7\xce\xf5\x4f\xa2\xb1\xcc\x0e\xa9\x41\xb6\x32\xcc\xb1\x1d\x08\x80\x0d\xb3\x24\xfe\xdc\xf4\x7f\x09\xab\xbf\xa9\x34\x38\x30\x09\x85\x2c\xf3\x8d\xaa\x1a\x9d\x27\x3a", 50); syz_execute_func(/*text=*/0x20000080); break; case 14: syz_exit(/*status=*/4); break; case 15: syz_mmap(/*addr=*/0x20ffd000, /*len=*/0x3000); break; case 16: syz_sleep_ms(/*ms=*/0x83); break; case 17: syz_test_fuzzer1(/*a=*/0xa, /*b=*/0xd, /*c=*/0xd); break; } } int main(void) { syz_mmap(/*addr=*/0x20000000, /*len=*/0x1000000); setup_fault(); use_temporary_dir(); do_sandbox_none(); return 0; } :305:9: error: call to undeclared function 'syscall'; ISO C99 and later do not support implicit function declarations [-Werror,-Wimplicit-function-declaration] res = syscall(SYS_test, /*a=*/0x20000040ul, 0, 0, 0, 0, 0); ^ 1 error generated. compiler invocation: c++ [-o /tmp/syz-executor1751158083 -DGOOS_test=1 -DGOARCH_64=1 -DHOSTGOOS_openbsd=1 -x c - -m64 -lutil -O2 -pthread -Wall -Werror -Wparentheses -Wunused-const-variable -Wframe-larger-than=16384 -Wno-array-bounds -Wno-unused-but-set-variable -Wno-unused-command-line-argument -no-pie -fno-exceptions] --- FAIL: TestGenerate/test/64/3 (1.37s) csource_test.go:150: opts: {Threaded:true Repeat:true RepeatTimes:10 Procs:0 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:false NetDevices:false NetReset:false Cgroups:false BinfmtMisc:false CloseFDs:false KCSAN:false DevlinkPCI:false NicVF:false USB:false VhciInjection:false Wifi:false IEEE802154:false Sysctl:false Swap:false UseTmpDir:true HandleSegv:false Repro:false Trace:false LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}} program: test$r101_producer_recur(&(0x7f0000000040)={&(0x7f0000000000)={0x0}}) (fail_nth: 1) test$r101_consumer(r0) (async) test$int(0x7a, 0xc3, 0x66f5, 0x9, 0x8) (rerun: 4) test$r104_producer(&(0x7f0000000080)=0x0) test$r104_producer(&(0x7f0000000100)=0x0) test$r103_producer_r104_consumer(&(0x7f00000000c0)={0x0, r1}, &(0x7f0000000140)={0x0, r2}) test$r104_producer(&(0x7f0000000180)=0x0) test$r104_producer(&(0x7f0000000200)=0x0) test$r103_producer_r104_consumer(&(0x7f00000001c0)={0x0, r3}, &(0x7f0000000240)={0x0, r4}) test$r101_producer_recur(&(0x7f00000002c0)={&(0x7f0000000280)}) syz_compare(&(0x7f0000000000)='\x00', 0x1, &(0x7f0000000040)=@bf9={0x7, {0x4, 0x6, 0x2}}, 0x4) syz_compare_int$2(0x2, 0x4, 0x3) syz_errno(0x1) syz_execute_func(&(0x7f0000000080)="dd683c971707a147f5d7cef54fa2b1cc0ea941b632ccb11d08800db324fedcf47f09abbfa934383009852cf38daa1a9d273a") syz_exit(0x4) syz_mmap(&(0x7f0000ffd000/0x3000)=nil, 0x3000) syz_sleep_ms(0x83) syz_test_fuzzer1(0xa, 0xd, 0xd) csource_test.go:151: failed to build program: // autogenerated by syzkaller (https://github.com/google/syzkaller) #define _GNU_SOURCE #include #include #include #include #include #include #include #include #include #include #include #include #ifndef SYS_test #define SYS_test 0 #endif static void sleep_ms(uint64_t ms) { usleep(ms * 1000); } static uint64_t current_time_ms(void) { struct timespec ts; if (clock_gettime(CLOCK_MONOTONIC, &ts)) exit(1); return (uint64_t)ts.tv_sec * 1000 + (uint64_t)ts.tv_nsec / 1000000; } static void use_temporary_dir(void) { char tmpdir_template[] = "./syzkaller.XXXXXX"; char* tmpdir = mkdtemp(tmpdir_template); if (!tmpdir) exit(1); if (chmod(tmpdir, 0777)) exit(1); if (chdir(tmpdir)) exit(1); } static int inject_fault(int nth) { return 0; } static void setup_fault() { } static void thread_start(void* (*fn)(void*), void* arg) { pthread_t th; pthread_attr_t attr; pthread_attr_init(&attr); pthread_attr_setstacksize(&attr, 128 << 10); int i = 0; for (; i < 100; i++) { if (pthread_create(&th, &attr, fn, arg) == 0) { pthread_attr_destroy(&attr); return; } if (errno == EAGAIN) { usleep(50); continue; } break; } exit(1); } typedef struct { pthread_mutex_t mu; pthread_cond_t cv; int state; } event_t; static void event_init(event_t* ev) { if (pthread_mutex_init(&ev->mu, 0)) exit(1); if (pthread_cond_init(&ev->cv, 0)) exit(1); ev->state = 0; } static void event_reset(event_t* ev) { ev->state = 0; } static void event_set(event_t* ev) { pthread_mutex_lock(&ev->mu); if (ev->state) exit(1); ev->state = 1; pthread_mutex_unlock(&ev->mu); pthread_cond_broadcast(&ev->cv); } static void event_wait(event_t* ev) { pthread_mutex_lock(&ev->mu); while (!ev->state) pthread_cond_wait(&ev->cv, &ev->mu); pthread_mutex_unlock(&ev->mu); } static int event_isset(event_t* ev) { pthread_mutex_lock(&ev->mu); int res = ev->state; pthread_mutex_unlock(&ev->mu); return res; } static int event_timedwait(event_t* ev, uint64_t timeout) { uint64_t start = current_time_ms(); uint64_t now = start; pthread_mutex_lock(&ev->mu); for (;;) { if (ev->state) break; uint64_t remain = timeout - (now - start); struct timespec ts; ts.tv_sec = remain / 1000; ts.tv_nsec = (remain % 1000) * 1000 * 1000; pthread_cond_timedwait(&ev->cv, &ev->mu, &ts); now = current_time_ms(); if (now - start > timeout) break; } int res = ev->state; pthread_mutex_unlock(&ev->mu); return res; } #define BITMASK(bf_off,bf_len) (((1ull << (bf_len)) - 1) << (bf_off)) #define STORE_BY_BITMASK(type,htobe,addr,val,bf_off,bf_len) *(type*)(addr) = htobe((htobe(*(type*)(addr)) & ~BITMASK((bf_off), (bf_len))) | (((type)(val) << (bf_off)) & BITMASK((bf_off), (bf_len)))) static long syz_mmap(volatile long a0, volatile long a1) { return (long)mmap((void*)a0, a1, PROT_READ | PROT_WRITE, MAP_ANON | MAP_PRIVATE | MAP_FIXED, -1, 0); } static long syz_errno(volatile long v) { errno = v; return v == 0 ? 0 : -1; } static long syz_exit(volatile long status) { _exit(status); return 0; } static long syz_sleep_ms(volatile long ms) { sleep_ms(ms); return 0; } static long syz_compare(volatile long want, volatile long want_len, volatile long got, volatile long got_len) { if (want_len != got_len) { errno = EBADF; goto error; } if (memcmp((void*)want, (void*)got, want_len)) { errno = EINVAL; goto error; } return 0; error: return -1; } static long syz_compare_int(volatile long n, ...) { va_list args; va_start(args, n); long v0 = va_arg(args, long); long v1 = va_arg(args, long); long v2 = va_arg(args, long); long v3 = va_arg(args, long); va_end(args); if (n < 2 || n > 4) return errno = E2BIG, -1; if (n <= 2 && v2 != 0) return errno = EFAULT, -1; if (n <= 3 && v3 != 0) return errno = EFAULT, -1; if (v0 != v1) return errno = EINVAL, -1; if (n > 2 && v0 != v2) return errno = EINVAL, -1; if (n > 3 && v0 != v3) return errno = EINVAL, -1; return 0; } static void loop(); static int do_sandbox_none(void) { loop(); return 0; } static void fake_crash(const char* name) { exit(1); exit(1); } static long syz_test_fuzzer1(volatile long a, volatile long b, volatile long c) { if (a == 1 && b == 1 && c == 1) fake_crash("first bug"); if (a == 1 && b == 2 && c == 3) fake_crash("second bug"); return 0; } static long syz_execute_func(volatile long text) { ((void (*)(void))(text))(); return 0; } struct thread_t { int created, call; event_t ready, done; }; static struct thread_t threads[16]; static void execute_call(int call); static int running; static void* thr(void* arg) { struct thread_t* th = (struct thread_t*)arg; for (;;) { event_wait(&th->ready); event_reset(&th->ready); execute_call(th->call); __atomic_fetch_sub(&running, 1, __ATOMIC_RELAXED); event_set(&th->done); } return 0; } static void execute_one(void) { int i, call, thread; for (call = 0; call < 18; call++) { for (thread = 0; thread < (int)(sizeof(threads) / sizeof(threads[0])); thread++) { struct thread_t* th = &threads[thread]; if (!th->created) { th->created = 1; event_init(&th->ready); event_init(&th->done); event_set(&th->done); thread_start(thr, th); } if (!event_isset(&th->done)) continue; event_reset(&th->done); th->call = call; __atomic_fetch_add(&running, 1, __ATOMIC_RELAXED); event_set(&th->ready); if (call == 1) break; event_timedwait(&th->done, 50); break; } } for (i = 0; i < 100 && __atomic_load_n(&running, __ATOMIC_RELAXED); i++) sleep_ms(1); } static void execute_one(void); static void loop(void) { execute_one(); } uint64_t r[5] = {0x0, 0x0, 0x0, 0x0, 0x0}; void execute_call(int call) { intptr_t res = 0; switch (call) { case 0: *(uint64_t*)0x20000040 = 0x20000000; inject_fault(1); res = syscall(SYS_test, /*a=*/0x20000040ul, 0, 0, 0, 0, 0); if (res != -1) r[0] = *(uint32_t*)0x20000000; break; case 1: syscall(SYS_test, /*a=*/r[0], 0, 0, 0, 0, 0); break; case 2: syscall(SYS_test, /*a0=*/0x7aul, /*a1=*/0xc3, /*a2=*/0x66f5, /*a3=*/9, /*a4=*/8ul, 0); { int i; for(i = 0; i < 4; i++) { syscall(SYS_test, /*a0=*/0x7aul, /*a1=*/0xc3, /*a2=*/0x66f5, /*a3=*/9, /*a4=*/8ul, 0); } } break; case 3: res = syscall(SYS_test, /*a=*/0x20000080ul, 0, 0, 0, 0, 0); if (res != -1) r[1] = *(uint32_t*)0x20000080; break; case 4: res = syscall(SYS_test, /*a=*/0x20000100ul, 0, 0, 0, 0, 0); if (res != -1) r[2] = *(uint32_t*)0x20000100; break; case 5: *(uint32_t*)0x200000c4 = r[1]; *(uint32_t*)0x20000144 = r[2]; syscall(SYS_test, /*a=*/0x200000c0ul, /*b=*/0x20000140ul, 0, 0, 0, 0); break; case 6: res = syscall(SYS_test, /*a=*/0x20000180ul, 0, 0, 0, 0, 0); if (res != -1) r[3] = *(uint32_t*)0x20000180; break; case 7: res = syscall(SYS_test, /*a=*/0x20000200ul, 0, 0, 0, 0, 0); if (res != -1) r[4] = *(uint32_t*)0x20000200; break; case 8: *(uint32_t*)0x200001c4 = r[3]; *(uint32_t*)0x20000244 = r[4]; syscall(SYS_test, /*a=*/0x200001c0ul, /*b=*/0x20000240ul, 0, 0, 0, 0); break; case 9: *(uint64_t*)0x200002c0 = 0x20000280; syscall(SYS_test, /*a=*/0x200002c0ul, 0, 0, 0, 0, 0); break; case 10: memset((void*)0x20000000, 0, 1); *(uint8_t*)0x20000040 = 7; *(uint8_t*)0x20000042 = 4; STORE_BY_BITMASK(uint16_t, , 0x20000042, 6, 8, 4); STORE_BY_BITMASK(uint16_t, , 0x20000042, 2, 12, 4); syz_compare(/*want=*/0x20000000, /*want_len=*/1, /*got=*/0x20000040, /*got_len=*/4); break; case 11: syz_compare_int(/*n=*/2, /*v0=*/4, /*v1=*/3, 0, 0); break; case 12: syz_errno(/*v=*/1); break; case 13: memcpy((void*)0x20000080, "\xdd\x68\x3c\x97\x17\x07\xa1\x47\xf5\xd7\xce\xf5\x4f\xa2\xb1\xcc\x0e\xa9\x41\xb6\x32\xcc\xb1\x1d\x08\x80\x0d\xb3\x24\xfe\xdc\xf4\x7f\x09\xab\xbf\xa9\x34\x38\x30\x09\x85\x2c\xf3\x8d\xaa\x1a\x9d\x27\x3a", 50); syz_execute_func(/*text=*/0x20000080); break; case 14: syz_exit(/*status=*/4); break; case 15: syz_mmap(/*addr=*/0x20ffd000, /*len=*/0x3000); break; case 16: syz_sleep_ms(/*ms=*/0x83); break; case 17: syz_test_fuzzer1(/*a=*/0xa, /*b=*/0xd, /*c=*/0xd); break; } } int main(void) { syz_mmap(/*addr=*/0x20000000, /*len=*/0x1000000); setup_fault(); use_temporary_dir(); do_sandbox_none(); return 0; } :305:9: error: call to undeclared function 'syscall'; ISO C99 and later do not support implicit function declarations [-Werror,-Wimplicit-function-declaration] res = syscall(SYS_test, /*a=*/0x20000040ul, 0, 0, 0, 0, 0); ^ 1 error generated. compiler invocation: c++ [-o /tmp/syz-executor312678901 -DGOOS_test=1 -DGOARCH_64=1 -DHOSTGOOS_openbsd=1 -x c - -m64 -lutil -O2 -pthread -Wall -Werror -Wparentheses -Wunused-const-variable -Wframe-larger-than=16384 -Wno-array-bounds -Wno-unused-but-set-variable -Wno-unused-command-line-argument -no-pie -fno-exceptions] --- FAIL: TestGenerate/test/64/9 (2.05s) csource_test.go:150: opts: {Threaded:true Repeat:true RepeatTimes:0 Procs:0 Slowdown:1 Sandbox:none SandboxArg:9223372036854775807 Leak:false NetInjection:false NetDevices:false NetReset:false Cgroups:false BinfmtMisc:false CloseFDs:false KCSAN:false DevlinkPCI:false NicVF:false USB:false VhciInjection:false Wifi:false IEEE802154:false Sysctl:false Swap:false UseTmpDir:true HandleSegv:false Repro:false Trace:false LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}} program: test$r101_producer_recur(&(0x7f0000000040)={&(0x7f0000000000)={0x0}}) (fail_nth: 1) test$r101_consumer(r0) (async) test$int(0x7a, 0xc3, 0x66f5, 0x9, 0x8) (rerun: 4) test$r104_producer(&(0x7f0000000080)=0x0) test$r104_producer(&(0x7f0000000100)=0x0) test$r103_producer_r104_consumer(&(0x7f00000000c0)={0x0, r1}, &(0x7f0000000140)={0x0, r2}) test$r104_producer(&(0x7f0000000180)=0x0) test$r104_producer(&(0x7f0000000200)=0x0) test$r103_producer_r104_consumer(&(0x7f00000001c0)={0x0, r3}, &(0x7f0000000240)={0x0, r4}) test$r101_producer_recur(&(0x7f00000002c0)={&(0x7f0000000280)}) syz_compare(&(0x7f0000000000)='\x00', 0x1, &(0x7f0000000040)=@bf9={0x7, {0x4, 0x6, 0x2}}, 0x4) syz_compare_int$2(0x2, 0x4, 0x3) syz_errno(0x1) syz_execute_func(&(0x7f0000000080)="dd683c971707a147f5d7cef54fa2b1cc0ea941b632ccb11d08800db324fedcf47f09abbfa934383009852cf38daa1a9d273a") syz_exit(0x4) syz_mmap(&(0x7f0000ffd000/0x3000)=nil, 0x3000) syz_sleep_ms(0x83) syz_test_fuzzer1(0xa, 0xd, 0xd) csource_test.go:151: failed to build program: // autogenerated by syzkaller (https://github.com/google/syzkaller) #define _GNU_SOURCE #include #include #include #include #include #include #include #include #include #include #include #include #ifndef SYS_test #define SYS_test 0 #endif static void sleep_ms(uint64_t ms) { usleep(ms * 1000); } static uint64_t current_time_ms(void) { struct timespec ts; if (clock_gettime(CLOCK_MONOTONIC, &ts)) exit(1); return (uint64_t)ts.tv_sec * 1000 + (uint64_t)ts.tv_nsec / 1000000; } static void use_temporary_dir(void) { char tmpdir_template[] = "./syzkaller.XXXXXX"; char* tmpdir = mkdtemp(tmpdir_template); if (!tmpdir) exit(1); if (chmod(tmpdir, 0777)) exit(1); if (chdir(tmpdir)) exit(1); } static int inject_fault(int nth) { return 0; } static void setup_fault() { } static void thread_start(void* (*fn)(void*), void* arg) { pthread_t th; pthread_attr_t attr; pthread_attr_init(&attr); pthread_attr_setstacksize(&attr, 128 << 10); int i = 0; for (; i < 100; i++) { if (pthread_create(&th, &attr, fn, arg) == 0) { pthread_attr_destroy(&attr); return; } if (errno == EAGAIN) { usleep(50); continue; } break; } exit(1); } typedef struct { pthread_mutex_t mu; pthread_cond_t cv; int state; } event_t; static void event_init(event_t* ev) { if (pthread_mutex_init(&ev->mu, 0)) exit(1); if (pthread_cond_init(&ev->cv, 0)) exit(1); ev->state = 0; } static void event_reset(event_t* ev) { ev->state = 0; } static void event_set(event_t* ev) { pthread_mutex_lock(&ev->mu); if (ev->state) exit(1); ev->state = 1; pthread_mutex_unlock(&ev->mu); pthread_cond_broadcast(&ev->cv); } static void event_wait(event_t* ev) { pthread_mutex_lock(&ev->mu); while (!ev->state) pthread_cond_wait(&ev->cv, &ev->mu); pthread_mutex_unlock(&ev->mu); } static int event_isset(event_t* ev) { pthread_mutex_lock(&ev->mu); int res = ev->state; pthread_mutex_unlock(&ev->mu); return res; } static int event_timedwait(event_t* ev, uint64_t timeout) { uint64_t start = current_time_ms(); uint64_t now = start; pthread_mutex_lock(&ev->mu); for (;;) { if (ev->state) break; uint64_t remain = timeout - (now - start); struct timespec ts; ts.tv_sec = remain / 1000; ts.tv_nsec = (remain % 1000) * 1000 * 1000; pthread_cond_timedwait(&ev->cv, &ev->mu, &ts); now = current_time_ms(); if (now - start > timeout) break; } int res = ev->state; pthread_mutex_unlock(&ev->mu); return res; } #define BITMASK(bf_off,bf_len) (((1ull << (bf_len)) - 1) << (bf_off)) #define STORE_BY_BITMASK(type,htobe,addr,val,bf_off,bf_len) *(type*)(addr) = htobe((htobe(*(type*)(addr)) & ~BITMASK((bf_off), (bf_len))) | (((type)(val) << (bf_off)) & BITMASK((bf_off), (bf_len)))) static long syz_mmap(volatile long a0, volatile long a1) { return (long)mmap((void*)a0, a1, PROT_READ | PROT_WRITE, MAP_ANON | MAP_PRIVATE | MAP_FIXED, -1, 0); } static long syz_errno(volatile long v) { errno = v; return v == 0 ? 0 : -1; } static long syz_exit(volatile long status) { _exit(status); return 0; } static long syz_sleep_ms(volatile long ms) { sleep_ms(ms); return 0; } static long syz_compare(volatile long want, volatile long want_len, volatile long got, volatile long got_len) { if (want_len != got_len) { errno = EBADF; goto error; } if (memcmp((void*)want, (void*)got, want_len)) { errno = EINVAL; goto error; } return 0; error: return -1; } static long syz_compare_int(volatile long n, ...) { va_list args; va_start(args, n); long v0 = va_arg(args, long); long v1 = va_arg(args, long); long v2 = va_arg(args, long); long v3 = va_arg(args, long); va_end(args); if (n < 2 || n > 4) return errno = E2BIG, -1; if (n <= 2 && v2 != 0) return errno = EFAULT, -1; if (n <= 3 && v3 != 0) return errno = EFAULT, -1; if (v0 != v1) return errno = EINVAL, -1; if (n > 2 && v0 != v2) return errno = EINVAL, -1; if (n > 3 && v0 != v3) return errno = EINVAL, -1; return 0; } static void loop(); static int do_sandbox_none(void) { loop(); return 0; } static void fake_crash(const char* name) { exit(1); exit(1); } static long syz_test_fuzzer1(volatile long a, volatile long b, volatile long c) { if (a == 1 && b == 1 && c == 1) fake_crash("first bug"); if (a == 1 && b == 2 && c == 3) fake_crash("second bug"); return 0; } static long syz_execute_func(volatile long text) { ((void (*)(void))(text))(); return 0; } struct thread_t { int created, call; event_t ready, done; }; static struct thread_t threads[16]; static void execute_call(int call); static int running; static void* thr(void* arg) { struct thread_t* th = (struct thread_t*)arg; for (;;) { event_wait(&th->ready); event_reset(&th->ready); execute_call(th->call); __atomic_fetch_sub(&running, 1, __ATOMIC_RELAXED); event_set(&th->done); } return 0; } static void execute_one(void) { int i, call, thread; for (call = 0; call < 18; call++) { for (thread = 0; thread < (int)(sizeof(threads) / sizeof(threads[0])); thread++) { struct thread_t* th = &threads[thread]; if (!th->created) { th->created = 1; event_init(&th->ready); event_init(&th->done); event_set(&th->done); thread_start(thr, th); } if (!event_isset(&th->done)) continue; event_reset(&th->done); th->call = call; __atomic_fetch_add(&running, 1, __ATOMIC_RELAXED); event_set(&th->ready); if (call == 1) break; event_timedwait(&th->done, 50); break; } } for (i = 0; i < 100 && __atomic_load_n(&running, __ATOMIC_RELAXED); i++) sleep_ms(1); } static void execute_one(void); static void loop(void) { execute_one(); } uint64_t r[5] = {0x0, 0x0, 0x0, 0x0, 0x0}; void execute_call(int call) { intptr_t res = 0; switch (call) { case 0: *(uint64_t*)0x20000040 = 0x20000000; inject_fault(1); res = syscall(SYS_test, /*a=*/0x20000040ul, 0, 0, 0, 0, 0); if (res != -1) r[0] = *(uint32_t*)0x20000000; break; case 1: syscall(SYS_test, /*a=*/r[0], 0, 0, 0, 0, 0); break; case 2: syscall(SYS_test, /*a0=*/0x7aul, /*a1=*/0xc3, /*a2=*/0x66f5, /*a3=*/9, /*a4=*/8ul, 0); { int i; for(i = 0; i < 4; i++) { syscall(SYS_test, /*a0=*/0x7aul, /*a1=*/0xc3, /*a2=*/0x66f5, /*a3=*/9, /*a4=*/8ul, 0); } } break; case 3: res = syscall(SYS_test, /*a=*/0x20000080ul, 0, 0, 0, 0, 0); if (res != -1) r[1] = *(uint32_t*)0x20000080; break; case 4: res = syscall(SYS_test, /*a=*/0x20000100ul, 0, 0, 0, 0, 0); if (res != -1) r[2] = *(uint32_t*)0x20000100; break; case 5: *(uint32_t*)0x200000c4 = r[1]; *(uint32_t*)0x20000144 = r[2]; syscall(SYS_test, /*a=*/0x200000c0ul, /*b=*/0x20000140ul, 0, 0, 0, 0); break; case 6: res = syscall(SYS_test, /*a=*/0x20000180ul, 0, 0, 0, 0, 0); if (res != -1) r[3] = *(uint32_t*)0x20000180; break; case 7: res = syscall(SYS_test, /*a=*/0x20000200ul, 0, 0, 0, 0, 0); if (res != -1) r[4] = *(uint32_t*)0x20000200; break; case 8: *(uint32_t*)0x200001c4 = r[3]; *(uint32_t*)0x20000244 = r[4]; syscall(SYS_test, /*a=*/0x200001c0ul, /*b=*/0x20000240ul, 0, 0, 0, 0); break; case 9: *(uint64_t*)0x200002c0 = 0x20000280; syscall(SYS_test, /*a=*/0x200002c0ul, 0, 0, 0, 0, 0); break; case 10: memset((void*)0x20000000, 0, 1); *(uint8_t*)0x20000040 = 7; *(uint8_t*)0x20000042 = 4; STORE_BY_BITMASK(uint16_t, , 0x20000042, 6, 8, 4); STORE_BY_BITMASK(uint16_t, , 0x20000042, 2, 12, 4); syz_compare(/*want=*/0x20000000, /*want_len=*/1, /*got=*/0x20000040, /*got_len=*/4); break; case 11: syz_compare_int(/*n=*/2, /*v0=*/4, /*v1=*/3, 0, 0); break; case 12: syz_errno(/*v=*/1); break; case 13: memcpy((void*)0x20000080, "\xdd\x68\x3c\x97\x17\x07\xa1\x47\xf5\xd7\xce\xf5\x4f\xa2\xb1\xcc\x0e\xa9\x41\xb6\x32\xcc\xb1\x1d\x08\x80\x0d\xb3\x24\xfe\xdc\xf4\x7f\x09\xab\xbf\xa9\x34\x38\x30\x09\x85\x2c\xf3\x8d\xaa\x1a\x9d\x27\x3a", 50); syz_execute_func(/*text=*/0x20000080); break; case 14: syz_exit(/*status=*/4); break; case 15: syz_mmap(/*addr=*/0x20ffd000, /*len=*/0x3000); break; case 16: syz_sleep_ms(/*ms=*/0x83); break; case 17: syz_test_fuzzer1(/*a=*/0xa, /*b=*/0xd, /*c=*/0xd); break; } } int main(void) { syz_mmap(/*addr=*/0x20000000, /*len=*/0x1000000); setup_fault(); use_temporary_dir(); do_sandbox_none(); return 0; } :305:9: error: call to undeclared function 'syscall'; ISO C99 and later do not support implicit function declarations [-Werror,-Wimplicit-function-declaration] res = syscall(SYS_test, /*a=*/0x20000040ul, 0, 0, 0, 0, 0); ^ 1 error generated. compiler invocation: c++ [-o /tmp/syz-executor3814867952 -DGOOS_test=1 -DGOARCH_64=1 -DHOSTGOOS_openbsd=1 -x c - -m64 -lutil -O2 -pthread -Wall -Werror -Wparentheses -Wunused-const-variable -Wframe-larger-than=16384 -Wno-array-bounds -Wno-unused-but-set-variable -Wno-unused-command-line-argument -no-pie -fno-exceptions] --- FAIL: TestGenerate/test/64/8 (2.56s) csource_test.go:150: opts: {Threaded:true Repeat:true RepeatTimes:0 Procs:0 Slowdown:1 Sandbox:none SandboxArg:-9223372036854775808 Leak:false NetInjection:false NetDevices:false NetReset:false Cgroups:false BinfmtMisc:false CloseFDs:false KCSAN:false DevlinkPCI:false NicVF:false USB:false VhciInjection:false Wifi:false IEEE802154:false Sysctl:false Swap:false UseTmpDir:true HandleSegv:false Repro:false Trace:false LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}} program: test$r101_producer_recur(&(0x7f0000000040)={&(0x7f0000000000)={0x0}}) (fail_nth: 1) test$r101_consumer(r0) (async) test$int(0x7a, 0xc3, 0x66f5, 0x9, 0x8) (rerun: 4) test$r104_producer(&(0x7f0000000080)=0x0) test$r104_producer(&(0x7f0000000100)=0x0) test$r103_producer_r104_consumer(&(0x7f00000000c0)={0x0, r1}, &(0x7f0000000140)={0x0, r2}) test$r104_producer(&(0x7f0000000180)=0x0) test$r104_producer(&(0x7f0000000200)=0x0) test$r103_producer_r104_consumer(&(0x7f00000001c0)={0x0, r3}, &(0x7f0000000240)={0x0, r4}) test$r101_producer_recur(&(0x7f00000002c0)={&(0x7f0000000280)}) syz_compare(&(0x7f0000000000)='\x00', 0x1, &(0x7f0000000040)=@bf9={0x7, {0x4, 0x6, 0x2}}, 0x4) syz_compare_int$2(0x2, 0x4, 0x3) syz_errno(0x1) syz_execute_func(&(0x7f0000000080)="dd683c971707a147f5d7cef54fa2b1cc0ea941b632ccb11d08800db324fedcf47f09abbfa934383009852cf38daa1a9d273a") syz_exit(0x4) syz_mmap(&(0x7f0000ffd000/0x3000)=nil, 0x3000) syz_sleep_ms(0x83) syz_test_fuzzer1(0xa, 0xd, 0xd) csource_test.go:151: failed to build program: // autogenerated by syzkaller (https://github.com/google/syzkaller) #define _GNU_SOURCE #include #include #include #include #include #include #include #include #include #include #include #include #ifndef SYS_test #define SYS_test 0 #endif static void sleep_ms(uint64_t ms) { usleep(ms * 1000); } static uint64_t current_time_ms(void) { struct timespec ts; if (clock_gettime(CLOCK_MONOTONIC, &ts)) exit(1); return (uint64_t)ts.tv_sec * 1000 + (uint64_t)ts.tv_nsec / 1000000; } static void use_temporary_dir(void) { char tmpdir_template[] = "./syzkaller.XXXXXX"; char* tmpdir = mkdtemp(tmpdir_template); if (!tmpdir) exit(1); if (chmod(tmpdir, 0777)) exit(1); if (chdir(tmpdir)) exit(1); } static int inject_fault(int nth) { return 0; } static void setup_fault() { } static void thread_start(void* (*fn)(void*), void* arg) { pthread_t th; pthread_attr_t attr; pthread_attr_init(&attr); pthread_attr_setstacksize(&attr, 128 << 10); int i = 0; for (; i < 100; i++) { if (pthread_create(&th, &attr, fn, arg) == 0) { pthread_attr_destroy(&attr); return; } if (errno == EAGAIN) { usleep(50); continue; } break; } exit(1); } typedef struct { pthread_mutex_t mu; pthread_cond_t cv; int state; } event_t; static void event_init(event_t* ev) { if (pthread_mutex_init(&ev->mu, 0)) exit(1); if (pthread_cond_init(&ev->cv, 0)) exit(1); ev->state = 0; } static void event_reset(event_t* ev) { ev->state = 0; } static void event_set(event_t* ev) { pthread_mutex_lock(&ev->mu); if (ev->state) exit(1); ev->state = 1; pthread_mutex_unlock(&ev->mu); pthread_cond_broadcast(&ev->cv); } static void event_wait(event_t* ev) { pthread_mutex_lock(&ev->mu); while (!ev->state) pthread_cond_wait(&ev->cv, &ev->mu); pthread_mutex_unlock(&ev->mu); } static int event_isset(event_t* ev) { pthread_mutex_lock(&ev->mu); int res = ev->state; pthread_mutex_unlock(&ev->mu); return res; } static int event_timedwait(event_t* ev, uint64_t timeout) { uint64_t start = current_time_ms(); uint64_t now = start; pthread_mutex_lock(&ev->mu); for (;;) { if (ev->state) break; uint64_t remain = timeout - (now - start); struct timespec ts; ts.tv_sec = remain / 1000; ts.tv_nsec = (remain % 1000) * 1000 * 1000; pthread_cond_timedwait(&ev->cv, &ev->mu, &ts); now = current_time_ms(); if (now - start > timeout) break; } int res = ev->state; pthread_mutex_unlock(&ev->mu); return res; } #define BITMASK(bf_off,bf_len) (((1ull << (bf_len)) - 1) << (bf_off)) #define STORE_BY_BITMASK(type,htobe,addr,val,bf_off,bf_len) *(type*)(addr) = htobe((htobe(*(type*)(addr)) & ~BITMASK((bf_off), (bf_len))) | (((type)(val) << (bf_off)) & BITMASK((bf_off), (bf_len)))) static long syz_mmap(volatile long a0, volatile long a1) { return (long)mmap((void*)a0, a1, PROT_READ | PROT_WRITE, MAP_ANON | MAP_PRIVATE | MAP_FIXED, -1, 0); } static long syz_errno(volatile long v) { errno = v; return v == 0 ? 0 : -1; } static long syz_exit(volatile long status) { _exit(status); return 0; } static long syz_sleep_ms(volatile long ms) { sleep_ms(ms); return 0; } static long syz_compare(volatile long want, volatile long want_len, volatile long got, volatile long got_len) { if (want_len != got_len) { errno = EBADF; goto error; } if (memcmp((void*)want, (void*)got, want_len)) { errno = EINVAL; goto error; } return 0; error: return -1; } static long syz_compare_int(volatile long n, ...) { va_list args; va_start(args, n); long v0 = va_arg(args, long); long v1 = va_arg(args, long); long v2 = va_arg(args, long); long v3 = va_arg(args, long); va_end(args); if (n < 2 || n > 4) return errno = E2BIG, -1; if (n <= 2 && v2 != 0) return errno = EFAULT, -1; if (n <= 3 && v3 != 0) return errno = EFAULT, -1; if (v0 != v1) return errno = EINVAL, -1; if (n > 2 && v0 != v2) return errno = EINVAL, -1; if (n > 3 && v0 != v3) return errno = EINVAL, -1; return 0; } static void loop(); static int do_sandbox_none(void) { loop(); return 0; } static void fake_crash(const char* name) { exit(1); exit(1); } static long syz_test_fuzzer1(volatile long a, volatile long b, volatile long c) { if (a == 1 && b == 1 && c == 1) fake_crash("first bug"); if (a == 1 && b == 2 && c == 3) fake_crash("second bug"); return 0; } static long syz_execute_func(volatile long text) { ((void (*)(void))(text))(); return 0; } struct thread_t { int created, call; event_t ready, done; }; static struct thread_t threads[16]; static void execute_call(int call); static int running; static void* thr(void* arg) { struct thread_t* th = (struct thread_t*)arg; for (;;) { event_wait(&th->ready); event_reset(&th->ready); execute_call(th->call); __atomic_fetch_sub(&running, 1, __ATOMIC_RELAXED); event_set(&th->done); } return 0; } static void execute_one(void) { int i, call, thread; for (call = 0; call < 18; call++) { for (thread = 0; thread < (int)(sizeof(threads) / sizeof(threads[0])); thread++) { struct thread_t* th = &threads[thread]; if (!th->created) { th->created = 1; event_init(&th->ready); event_init(&th->done); event_set(&th->done); thread_start(thr, th); } if (!event_isset(&th->done)) continue; event_reset(&th->done); th->call = call; __atomic_fetch_add(&running, 1, __ATOMIC_RELAXED); event_set(&th->ready); if (call == 1) break; event_timedwait(&th->done, 50); break; } } for (i = 0; i < 100 && __atomic_load_n(&running, __ATOMIC_RELAXED); i++) sleep_ms(1); } static void execute_one(void); static void loop(void) { execute_one(); } uint64_t r[5] = {0x0, 0x0, 0x0, 0x0, 0x0}; void execute_call(int call) { intptr_t res = 0; switch (call) { case 0: *(uint64_t*)0x20000040 = 0x20000000; inject_fault(1); res = syscall(SYS_test, /*a=*/0x20000040ul, 0, 0, 0, 0, 0); if (res != -1) r[0] = *(uint32_t*)0x20000000; break; case 1: syscall(SYS_test, /*a=*/r[0], 0, 0, 0, 0, 0); break; case 2: syscall(SYS_test, /*a0=*/0x7aul, /*a1=*/0xc3, /*a2=*/0x66f5, /*a3=*/9, /*a4=*/8ul, 0); { int i; for(i = 0; i < 4; i++) { syscall(SYS_test, /*a0=*/0x7aul, /*a1=*/0xc3, /*a2=*/0x66f5, /*a3=*/9, /*a4=*/8ul, 0); } } break; case 3: res = syscall(SYS_test, /*a=*/0x20000080ul, 0, 0, 0, 0, 0); if (res != -1) r[1] = *(uint32_t*)0x20000080; break; case 4: res = syscall(SYS_test, /*a=*/0x20000100ul, 0, 0, 0, 0, 0); if (res != -1) r[2] = *(uint32_t*)0x20000100; break; case 5: *(uint32_t*)0x200000c4 = r[1]; *(uint32_t*)0x20000144 = r[2]; syscall(SYS_test, /*a=*/0x200000c0ul, /*b=*/0x20000140ul, 0, 0, 0, 0); break; case 6: res = syscall(SYS_test, /*a=*/0x20000180ul, 0, 0, 0, 0, 0); if (res != -1) r[3] = *(uint32_t*)0x20000180; break; case 7: res = syscall(SYS_test, /*a=*/0x20000200ul, 0, 0, 0, 0, 0); if (res != -1) r[4] = *(uint32_t*)0x20000200; break; case 8: *(uint32_t*)0x200001c4 = r[3]; *(uint32_t*)0x20000244 = r[4]; syscall(SYS_test, /*a=*/0x200001c0ul, /*b=*/0x20000240ul, 0, 0, 0, 0); break; case 9: *(uint64_t*)0x200002c0 = 0x20000280; syscall(SYS_test, /*a=*/0x200002c0ul, 0, 0, 0, 0, 0); break; case 10: memset((void*)0x20000000, 0, 1); *(uint8_t*)0x20000040 = 7; *(uint8_t*)0x20000042 = 4; STORE_BY_BITMASK(uint16_t, , 0x20000042, 6, 8, 4); STORE_BY_BITMASK(uint16_t, , 0x20000042, 2, 12, 4); syz_compare(/*want=*/0x20000000, /*want_len=*/1, /*got=*/0x20000040, /*got_len=*/4); break; case 11: syz_compare_int(/*n=*/2, /*v0=*/4, /*v1=*/3, 0, 0); break; case 12: syz_errno(/*v=*/1); break; case 13: memcpy((void*)0x20000080, "\xdd\x68\x3c\x97\x17\x07\xa1\x47\xf5\xd7\xce\xf5\x4f\xa2\xb1\xcc\x0e\xa9\x41\xb6\x32\xcc\xb1\x1d\x08\x80\x0d\xb3\x24\xfe\xdc\xf4\x7f\x09\xab\xbf\xa9\x34\x38\x30\x09\x85\x2c\xf3\x8d\xaa\x1a\x9d\x27\x3a", 50); syz_execute_func(/*text=*/0x20000080); break; case 14: syz_exit(/*status=*/4); break; case 15: syz_mmap(/*addr=*/0x20ffd000, /*len=*/0x3000); break; case 16: syz_sleep_ms(/*ms=*/0x83); break; case 17: syz_test_fuzzer1(/*a=*/0xa, /*b=*/0xd, /*c=*/0xd); break; } } int main(void) { syz_mmap(/*addr=*/0x20000000, /*len=*/0x1000000); setup_fault(); use_temporary_dir(); do_sandbox_none(); return 0; } :305:9: error: call to undeclared function 'syscall'; ISO C99 and later do not support implicit function declarations [-Werror,-Wimplicit-function-declaration] res = syscall(SYS_test, /*a=*/0x20000040ul, 0, 0, 0, 0, 0); ^ 1 error generated. compiler invocation: c++ [-o /tmp/syz-executor4269437071 -DGOOS_test=1 -DGOARCH_64=1 -DHOSTGOOS_openbsd=1 -x c - -m64 -lutil -O2 -pthread -Wall -Werror -Wparentheses -Wunused-const-variable -Wframe-larger-than=16384 -Wno-array-bounds -Wno-unused-but-set-variable -Wno-unused-command-line-argument -no-pie -fno-exceptions] --- FAIL: TestGenerate/test/64/0 (2.80s) csource_test.go:150: opts: {Threaded:false Repeat:true RepeatTimes:0 Procs:0 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:false NetDevices:false NetReset:false Cgroups:false BinfmtMisc:false CloseFDs:false KCSAN:false DevlinkPCI:false NicVF:false USB:false VhciInjection:false Wifi:false IEEE802154:false Sysctl:false Swap:false UseTmpDir:true HandleSegv:false Repro:false Trace:false LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}} program: test$r101_producer_recur(&(0x7f0000000040)={&(0x7f0000000000)={0x0}}) (fail_nth: 1) test$r101_consumer(r0) (async) test$int(0x7a, 0xc3, 0x66f5, 0x9, 0x8) (rerun: 4) test$r104_producer(&(0x7f0000000080)=0x0) test$r104_producer(&(0x7f0000000100)=0x0) test$r103_producer_r104_consumer(&(0x7f00000000c0)={0x0, r1}, &(0x7f0000000140)={0x0, r2}) test$r104_producer(&(0x7f0000000180)=0x0) test$r104_producer(&(0x7f0000000200)=0x0) test$r103_producer_r104_consumer(&(0x7f00000001c0)={0x0, r3}, &(0x7f0000000240)={0x0, r4}) test$r101_producer_recur(&(0x7f00000002c0)={&(0x7f0000000280)}) syz_compare(&(0x7f0000000000)='\x00', 0x1, &(0x7f0000000040)=@bf9={0x7, {0x4, 0x6, 0x2}}, 0x4) syz_compare_int$2(0x2, 0x4, 0x3) syz_errno(0x1) syz_execute_func(&(0x7f0000000080)="dd683c971707a147f5d7cef54fa2b1cc0ea941b632ccb11d08800db324fedcf47f09abbfa934383009852cf38daa1a9d273a") syz_exit(0x4) syz_mmap(&(0x7f0000ffd000/0x3000)=nil, 0x3000) syz_sleep_ms(0x83) syz_test_fuzzer1(0xa, 0xd, 0xd) csource_test.go:151: failed to build program: // autogenerated by syzkaller (https://github.com/google/syzkaller) #define _GNU_SOURCE #include #include #include #include #include #include #include #include #include #include #ifndef SYS_test #define SYS_test 0 #endif static void sleep_ms(uint64_t ms) { usleep(ms * 1000); } static void use_temporary_dir(void) { char tmpdir_template[] = "./syzkaller.XXXXXX"; char* tmpdir = mkdtemp(tmpdir_template); if (!tmpdir) exit(1); if (chmod(tmpdir, 0777)) exit(1); if (chdir(tmpdir)) exit(1); } static int inject_fault(int nth) { return 0; } static void setup_fault() { } #define BITMASK(bf_off,bf_len) (((1ull << (bf_len)) - 1) << (bf_off)) #define STORE_BY_BITMASK(type,htobe,addr,val,bf_off,bf_len) *(type*)(addr) = htobe((htobe(*(type*)(addr)) & ~BITMASK((bf_off), (bf_len))) | (((type)(val) << (bf_off)) & BITMASK((bf_off), (bf_len)))) static long syz_mmap(volatile long a0, volatile long a1) { return (long)mmap((void*)a0, a1, PROT_READ | PROT_WRITE, MAP_ANON | MAP_PRIVATE | MAP_FIXED, -1, 0); } static long syz_errno(volatile long v) { errno = v; return v == 0 ? 0 : -1; } static long syz_exit(volatile long status) { _exit(status); return 0; } static long syz_sleep_ms(volatile long ms) { sleep_ms(ms); return 0; } static long syz_compare(volatile long want, volatile long want_len, volatile long got, volatile long got_len) { if (want_len != got_len) { errno = EBADF; goto error; } if (memcmp((void*)want, (void*)got, want_len)) { errno = EINVAL; goto error; } return 0; error: return -1; } static long syz_compare_int(volatile long n, ...) { va_list args; va_start(args, n); long v0 = va_arg(args, long); long v1 = va_arg(args, long); long v2 = va_arg(args, long); long v3 = va_arg(args, long); va_end(args); if (n < 2 || n > 4) return errno = E2BIG, -1; if (n <= 2 && v2 != 0) return errno = EFAULT, -1; if (n <= 3 && v3 != 0) return errno = EFAULT, -1; if (v0 != v1) return errno = EINVAL, -1; if (n > 2 && v0 != v2) return errno = EINVAL, -1; if (n > 3 && v0 != v3) return errno = EINVAL, -1; return 0; } static void loop(); static int do_sandbox_none(void) { loop(); return 0; } static void fake_crash(const char* name) { exit(1); exit(1); } static long syz_test_fuzzer1(volatile long a, volatile long b, volatile long c) { if (a == 1 && b == 1 && c == 1) fake_crash("first bug"); if (a == 1 && b == 2 && c == 3) fake_crash("second bug"); return 0; } static long syz_execute_func(volatile long text) { ((void (*)(void))(text))(); return 0; } static void execute_one(void); static void loop(void) { execute_one(); } uint64_t r[5] = {0x0, 0x0, 0x0, 0x0, 0x0}; void execute_one(void) { intptr_t res = 0; *(uint64_t*)0x20000040 = 0x20000000; inject_fault(1); res = syscall(SYS_test, /*a=*/0x20000040ul, 0, 0, 0, 0, 0); if (res != -1) r[0] = *(uint32_t*)0x20000000; syscall(SYS_test, /*a=*/r[0], 0, 0, 0, 0, 0); syscall(SYS_test, /*a0=*/0x7aul, /*a1=*/0xc3, /*a2=*/0x66f5, /*a3=*/9, /*a4=*/8ul, 0); { int i; for(i = 0; i < 4; i++) { syscall(SYS_test, /*a0=*/0x7aul, /*a1=*/0xc3, /*a2=*/0x66f5, /*a3=*/9, /*a4=*/8ul, 0); } } res = syscall(SYS_test, /*a=*/0x20000080ul, 0, 0, 0, 0, 0); if (res != -1) r[1] = *(uint32_t*)0x20000080; res = syscall(SYS_test, /*a=*/0x20000100ul, 0, 0, 0, 0, 0); if (res != -1) r[2] = *(uint32_t*)0x20000100; *(uint32_t*)0x200000c4 = r[1]; *(uint32_t*)0x20000144 = r[2]; syscall(SYS_test, /*a=*/0x200000c0ul, /*b=*/0x20000140ul, 0, 0, 0, 0); res = syscall(SYS_test, /*a=*/0x20000180ul, 0, 0, 0, 0, 0); if (res != -1) r[3] = *(uint32_t*)0x20000180; res = syscall(SYS_test, /*a=*/0x20000200ul, 0, 0, 0, 0, 0); if (res != -1) r[4] = *(uint32_t*)0x20000200; *(uint32_t*)0x200001c4 = r[3]; *(uint32_t*)0x20000244 = r[4]; syscall(SYS_test, /*a=*/0x200001c0ul, /*b=*/0x20000240ul, 0, 0, 0, 0); *(uint64_t*)0x200002c0 = 0x20000280; syscall(SYS_test, /*a=*/0x200002c0ul, 0, 0, 0, 0, 0); memset((void*)0x20000000, 0, 1); *(uint8_t*)0x20000040 = 7; *(uint8_t*)0x20000042 = 4; STORE_BY_BITMASK(uint16_t, , 0x20000042, 6, 8, 4); STORE_BY_BITMASK(uint16_t, , 0x20000042, 2, 12, 4); syz_compare(/*want=*/0x20000000, /*want_len=*/1, /*got=*/0x20000040, /*got_len=*/4); syz_compare_int(/*n=*/2, /*v0=*/4, /*v1=*/3, 0, 0); syz_errno(/*v=*/1); memcpy((void*)0x20000080, "\xdd\x68\x3c\x97\x17\x07\xa1\x47\xf5\xd7\xce\xf5\x4f\xa2\xb1\xcc\x0e\xa9\x41\xb6\x32\xcc\xb1\x1d\x08\x80\x0d\xb3\x24\xfe\xdc\xf4\x7f\x09\xab\xbf\xa9\x34\x38\x30\x09\x85\x2c\xf3\x8d\xaa\x1a\x9d\x27\x3a", 50); syz_execute_func(/*text=*/0x20000080); syz_exit(/*status=*/4); syz_mmap(/*addr=*/0x20ffd000, /*len=*/0x3000); syz_sleep_ms(/*ms=*/0x83); syz_test_fuzzer1(/*a=*/0xa, /*b=*/0xd, /*c=*/0xd); } int main(void) { syz_mmap(/*addr=*/0x20000000, /*len=*/0x1000000); setup_fault(); use_temporary_dir(); do_sandbox_none(); return 0; } :153:8: error: call to undeclared function 'syscall'; ISO C99 and later do not support implicit function declarations [-Werror,-Wimplicit-function-declaration] res = syscall(SYS_test, /*a=*/0x20000040ul, 0, 0, 0, 0, 0); ^ 1 error generated. compiler invocation: c++ [-o /tmp/syz-executor1472292801 -DGOOS_test=1 -DGOARCH_64=1 -DHOSTGOOS_openbsd=1 -x c - -m64 -lutil -O2 -pthread -Wall -Werror -Wparentheses -Wunused-const-variable -Wframe-larger-than=16384 -Wno-array-bounds -Wno-unused-but-set-variable -Wno-unused-command-line-argument -no-pie -fno-exceptions] --- FAIL: TestGenerate/test/64/14 (1.68s) csource_test.go:150: opts: {Threaded:true Repeat:true RepeatTimes:0 Procs:2 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:false NetDevices:false NetReset:false Cgroups:false BinfmtMisc:false CloseFDs:false KCSAN:false DevlinkPCI:false NicVF:false USB:false VhciInjection:false Wifi:false IEEE802154:false Sysctl:false Swap:false UseTmpDir:true HandleSegv:false Repro:true Trace:false LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}} program: test$r101_producer_recur(&(0x7f0000000040)={&(0x7f0000000000)={0x0}}) (fail_nth: 1) test$r101_consumer(r0) (async) test$int(0x7a, 0xc3, 0x66f5, 0x9, 0x8) (rerun: 4) test$r104_producer(&(0x7f0000000080)=0x0) test$r104_producer(&(0x7f0000000100)=0x0) test$r103_producer_r104_consumer(&(0x7f00000000c0)={0x0, r1}, &(0x7f0000000140)={0x0, r2}) test$r104_producer(&(0x7f0000000180)=0x0) test$r104_producer(&(0x7f0000000200)=0x0) test$r103_producer_r104_consumer(&(0x7f00000001c0)={0x0, r3}, &(0x7f0000000240)={0x0, r4}) test$r101_producer_recur(&(0x7f00000002c0)={&(0x7f0000000280)}) syz_compare(&(0x7f0000000000)='\x00', 0x1, &(0x7f0000000040)=@bf9={0x7, {0x4, 0x6, 0x2}}, 0x4) syz_compare_int$2(0x2, 0x4, 0x3) syz_errno(0x1) syz_execute_func(&(0x7f0000000080)="dd683c971707a147f5d7cef54fa2b1cc0ea941b632ccb11d08800db324fedcf47f09abbfa934383009852cf38daa1a9d273a") syz_exit(0x4) syz_mmap(&(0x7f0000ffd000/0x3000)=nil, 0x3000) syz_sleep_ms(0x83) syz_test_fuzzer1(0xa, 0xd, 0xd) csource_test.go:151: failed to build program: // autogenerated by syzkaller (https://github.com/google/syzkaller) #define _GNU_SOURCE #include #include #include #include #include #include #include #include #include #include #include #include #ifndef SYS_test #define SYS_test 0 #endif static unsigned long long procid; static void sleep_ms(uint64_t ms) { usleep(ms * 1000); } static uint64_t current_time_ms(void) { struct timespec ts; if (clock_gettime(CLOCK_MONOTONIC, &ts)) exit(1); return (uint64_t)ts.tv_sec * 1000 + (uint64_t)ts.tv_nsec / 1000000; } static void use_temporary_dir(void) { char tmpdir_template[] = "./syzkaller.XXXXXX"; char* tmpdir = mkdtemp(tmpdir_template); if (!tmpdir) exit(1); if (chmod(tmpdir, 0777)) exit(1); if (chdir(tmpdir)) exit(1); } static int inject_fault(int nth) { return 0; } static void setup_fault() { } static void thread_start(void* (*fn)(void*), void* arg) { pthread_t th; pthread_attr_t attr; pthread_attr_init(&attr); pthread_attr_setstacksize(&attr, 128 << 10); int i = 0; for (; i < 100; i++) { if (pthread_create(&th, &attr, fn, arg) == 0) { pthread_attr_destroy(&attr); return; } if (errno == EAGAIN) { usleep(50); continue; } break; } exit(1); } typedef struct { pthread_mutex_t mu; pthread_cond_t cv; int state; } event_t; static void event_init(event_t* ev) { if (pthread_mutex_init(&ev->mu, 0)) exit(1); if (pthread_cond_init(&ev->cv, 0)) exit(1); ev->state = 0; } static void event_reset(event_t* ev) { ev->state = 0; } static void event_set(event_t* ev) { pthread_mutex_lock(&ev->mu); if (ev->state) exit(1); ev->state = 1; pthread_mutex_unlock(&ev->mu); pthread_cond_broadcast(&ev->cv); } static void event_wait(event_t* ev) { pthread_mutex_lock(&ev->mu); while (!ev->state) pthread_cond_wait(&ev->cv, &ev->mu); pthread_mutex_unlock(&ev->mu); } static int event_isset(event_t* ev) { pthread_mutex_lock(&ev->mu); int res = ev->state; pthread_mutex_unlock(&ev->mu); return res; } static int event_timedwait(event_t* ev, uint64_t timeout) { uint64_t start = current_time_ms(); uint64_t now = start; pthread_mutex_lock(&ev->mu); for (;;) { if (ev->state) break; uint64_t remain = timeout - (now - start); struct timespec ts; ts.tv_sec = remain / 1000; ts.tv_nsec = (remain % 1000) * 1000 * 1000; pthread_cond_timedwait(&ev->cv, &ev->mu, &ts); now = current_time_ms(); if (now - start > timeout) break; } int res = ev->state; pthread_mutex_unlock(&ev->mu); return res; } #define BITMASK(bf_off,bf_len) (((1ull << (bf_len)) - 1) << (bf_off)) #define STORE_BY_BITMASK(type,htobe,addr,val,bf_off,bf_len) *(type*)(addr) = htobe((htobe(*(type*)(addr)) & ~BITMASK((bf_off), (bf_len))) | (((type)(val) << (bf_off)) & BITMASK((bf_off), (bf_len)))) static long syz_mmap(volatile long a0, volatile long a1) { return (long)mmap((void*)a0, a1, PROT_READ | PROT_WRITE, MAP_ANON | MAP_PRIVATE | MAP_FIXED, -1, 0); } static long syz_errno(volatile long v) { errno = v; return v == 0 ? 0 : -1; } static long syz_exit(volatile long status) { _exit(status); return 0; } static long syz_sleep_ms(volatile long ms) { sleep_ms(ms); return 0; } static long syz_compare(volatile long want, volatile long want_len, volatile long got, volatile long got_len) { if (want_len != got_len) { errno = EBADF; goto error; } if (memcmp((void*)want, (void*)got, want_len)) { errno = EINVAL; goto error; } return 0; error: return -1; } static long syz_compare_int(volatile long n, ...) { va_list args; va_start(args, n); long v0 = va_arg(args, long); long v1 = va_arg(args, long); long v2 = va_arg(args, long); long v3 = va_arg(args, long); va_end(args); if (n < 2 || n > 4) return errno = E2BIG, -1; if (n <= 2 && v2 != 0) return errno = EFAULT, -1; if (n <= 3 && v3 != 0) return errno = EFAULT, -1; if (v0 != v1) return errno = EINVAL, -1; if (n > 2 && v0 != v2) return errno = EINVAL, -1; if (n > 3 && v0 != v3) return errno = EINVAL, -1; return 0; } static void loop(); static int do_sandbox_none(void) { loop(); return 0; } static void fake_crash(const char* name) { exit(1); exit(1); } static long syz_test_fuzzer1(volatile long a, volatile long b, volatile long c) { if (a == 1 && b == 1 && c == 1) fake_crash("first bug"); if (a == 1 && b == 2 && c == 3) fake_crash("second bug"); return 0; } static long syz_execute_func(volatile long text) { ((void (*)(void))(text))(); return 0; } struct thread_t { int created, call; event_t ready, done; }; static struct thread_t threads[16]; static void execute_call(int call); static int running; static void* thr(void* arg) { struct thread_t* th = (struct thread_t*)arg; for (;;) { event_wait(&th->ready); event_reset(&th->ready); execute_call(th->call); __atomic_fetch_sub(&running, 1, __ATOMIC_RELAXED); event_set(&th->done); } return 0; } static void execute_one(void) { if (write(1, "executing program\n", sizeof("executing program\n") - 1)) { } int i, call, thread; for (call = 0; call < 18; call++) { for (thread = 0; thread < (int)(sizeof(threads) / sizeof(threads[0])); thread++) { struct thread_t* th = &threads[thread]; if (!th->created) { th->created = 1; event_init(&th->ready); event_init(&th->done); event_set(&th->done); thread_start(thr, th); } if (!event_isset(&th->done)) continue; event_reset(&th->done); th->call = call; __atomic_fetch_add(&running, 1, __ATOMIC_RELAXED); event_set(&th->ready); if (call == 1) break; event_timedwait(&th->done, 50); break; } } for (i = 0; i < 100 && __atomic_load_n(&running, __ATOMIC_RELAXED); i++) sleep_ms(1); } static void execute_one(void); static void loop(void) { execute_one(); } uint64_t r[5] = {0x0, 0x0, 0x0, 0x0, 0x0}; void execute_call(int call) { intptr_t res = 0; switch (call) { case 0: *(uint64_t*)0x20000040 = 0x20000000; inject_fault(1); res = syscall(SYS_test, /*a=*/0x20000040ul, 0, 0, 0, 0, 0); if (res != -1) r[0] = *(uint32_t*)0x20000000; break; case 1: syscall(SYS_test, /*a=*/r[0], 0, 0, 0, 0, 0); break; case 2: syscall(SYS_test, /*a0=*/0x7aul, /*a1=*/0xc3, /*a2=*/0x66f5, /*a3=*/9, /*a4=*/8ul, 0); { int i; for(i = 0; i < 4; i++) { syscall(SYS_test, /*a0=*/0x7aul, /*a1=*/0xc3, /*a2=*/0x66f5, /*a3=*/9, /*a4=*/8ul, 0); } } break; case 3: res = syscall(SYS_test, /*a=*/0x20000080ul, 0, 0, 0, 0, 0); if (res != -1) r[1] = *(uint32_t*)0x20000080; break; case 4: res = syscall(SYS_test, /*a=*/0x20000100ul, 0, 0, 0, 0, 0); if (res != -1) r[2] = *(uint32_t*)0x20000100; break; case 5: *(uint32_t*)0x200000c4 = r[1]; *(uint32_t*)0x20000144 = r[2]; syscall(SYS_test, /*a=*/0x200000c0ul, /*b=*/0x20000140ul, 0, 0, 0, 0); break; case 6: res = syscall(SYS_test, /*a=*/0x20000180ul, 0, 0, 0, 0, 0); if (res != -1) r[3] = *(uint32_t*)0x20000180; break; case 7: res = syscall(SYS_test, /*a=*/0x20000200ul, 0, 0, 0, 0, 0); if (res != -1) r[4] = *(uint32_t*)0x20000200; break; case 8: *(uint32_t*)0x200001c4 = r[3]; *(uint32_t*)0x20000244 = r[4]; syscall(SYS_test, /*a=*/0x200001c0ul, /*b=*/0x20000240ul, 0, 0, 0, 0); break; case 9: *(uint64_t*)0x200002c0 = 0x20000280; syscall(SYS_test, /*a=*/0x200002c0ul, 0, 0, 0, 0, 0); break; case 10: memset((void*)0x20000000, 0, 1); *(uint8_t*)0x20000040 = 7; *(uint8_t*)0x20000042 = 4; STORE_BY_BITMASK(uint16_t, , 0x20000042, 6, 8, 4); STORE_BY_BITMASK(uint16_t, , 0x20000042, 2, 12, 4); syz_compare(/*want=*/0x20000000, /*want_len=*/1, /*got=*/0x20000040, /*got_len=*/4); break; case 11: syz_compare_int(/*n=*/2, /*v0=*/4, /*v1=*/3, 0, 0); break; case 12: syz_errno(/*v=*/1); break; case 13: memcpy((void*)0x20000080, "\xdd\x68\x3c\x97\x17\x07\xa1\x47\xf5\xd7\xce\xf5\x4f\xa2\xb1\xcc\x0e\xa9\x41\xb6\x32\xcc\xb1\x1d\x08\x80\x0d\xb3\x24\xfe\xdc\xf4\x7f\x09\xab\xbf\xa9\x34\x38\x30\x09\x85\x2c\xf3\x8d\xaa\x1a\x9d\x27\x3a", 50); syz_execute_func(/*text=*/0x20000080); break; case 14: syz_exit(/*status=*/4); break; case 15: syz_mmap(/*addr=*/0x20ffd000, /*len=*/0x3000); break; case 16: syz_sleep_ms(/*ms=*/0x83); break; case 17: syz_test_fuzzer1(/*a=*/0xa, /*b=*/0xd, /*c=*/0xd); break; } } int main(void) { syz_mmap(/*addr=*/0x20000000, /*len=*/0x1000000); setup_fault(); for (procid = 0; procid < 2; procid++) { if (fork() == 0) { use_temporary_dir(); do_sandbox_none(); } } sleep(1000000); return 0; } :309:9: error: call to undeclared function 'syscall'; ISO C99 and later do not support implicit function declarations [-Werror,-Wimplicit-function-declaration] res = syscall(SYS_test, /*a=*/0x20000040ul, 0, 0, 0, 0, 0); ^ 1 error generated. compiler invocation: c++ [-o /tmp/syz-executor3440297106 -DGOOS_test=1 -DGOARCH_64=1 -DHOSTGOOS_openbsd=1 -x c - -m64 -lutil -O2 -pthread -Wall -Werror -Wparentheses -Wunused-const-variable -Wframe-larger-than=16384 -Wno-array-bounds -Wno-unused-but-set-variable -Wno-unused-command-line-argument -no-pie -fno-exceptions] --- FAIL: TestGenerate/test/64/7 (3.23s) csource_test.go:148: --- FAIL: TestGenerate/test/64/10 (1.97s) csource_test.go:148: --- FAIL: TestGenerate/test/64/4 (1.65s) csource_test.go:148: --- FAIL: TestGenerate/test/64/13 (2.55s) csource_test.go:148: FAIL FAIL github.com/google/syzkaller/pkg/csource 64.463s ok github.com/google/syzkaller/pkg/db 3.160s ok github.com/google/syzkaller/pkg/email (cached) ok github.com/google/syzkaller/pkg/email/lore (cached) ok github.com/google/syzkaller/pkg/fuzzer 71.058s ok github.com/google/syzkaller/pkg/gce (cached) ok github.com/google/syzkaller/pkg/host 11.803s ok github.com/google/syzkaller/pkg/html (cached) ok github.com/google/syzkaller/pkg/ifuzz (cached) ok github.com/google/syzkaller/pkg/image (cached) ok github.com/google/syzkaller/pkg/instance 17.669s ok github.com/google/syzkaller/pkg/ipc 36.678s ok github.com/google/syzkaller/pkg/kconfig (cached) ok github.com/google/syzkaller/pkg/kd (cached) ok github.com/google/syzkaller/pkg/log (cached) ok github.com/google/syzkaller/pkg/mgrconfig 13.539s ok github.com/google/syzkaller/pkg/osutil 9.303s ok github.com/google/syzkaller/pkg/report 30.642s ok github.com/google/syzkaller/pkg/repro 11.420s ok github.com/google/syzkaller/pkg/runtest 153.966s ok github.com/google/syzkaller/pkg/serializer (cached) ok github.com/google/syzkaller/pkg/signal (cached) ok github.com/google/syzkaller/pkg/stats (cached) ok github.com/google/syzkaller/pkg/subsystem (cached) ok github.com/google/syzkaller/pkg/subsystem/linux 0.414s ok github.com/google/syzkaller/pkg/subsystem/lists (cached) ok github.com/google/syzkaller/pkg/symbolizer 0.830s ok github.com/google/syzkaller/pkg/tool (cached) ok github.com/google/syzkaller/pkg/vcs 143.097s ok github.com/google/syzkaller/prog 79.238s ok github.com/google/syzkaller/prog/test (cached) ok github.com/google/syzkaller/sys/linux (cached) ok github.com/google/syzkaller/sys/netbsd (cached) ok github.com/google/syzkaller/sys/openbsd (cached) ok github.com/google/syzkaller/syz-ci 79.096s ok github.com/google/syzkaller/syz-fuzzer (cached) ok github.com/google/syzkaller/syz-hub (cached) ok github.com/google/syzkaller/syz-hub/state 2.851s ok github.com/google/syzkaller/syz-manager 36.198s ok github.com/google/syzkaller/syz-verifier 17.657s ok github.com/google/syzkaller/tools/syz-kconf (cached) ok github.com/google/syzkaller/tools/syz-linter 11.236s ok github.com/google/syzkaller/tools/syz-testbed 17.148s ok github.com/google/syzkaller/tools/syz-trace2syz/parser (cached) ok github.com/google/syzkaller/tools/syz-trace2syz/proggen (cached) ok github.com/google/syzkaller/vm 27.116s ok github.com/google/syzkaller/vm/isolated 18.095s ok github.com/google/syzkaller/vm/proxyapp 19.012s ok github.com/google/syzkaller/vm/vmimpl 13.600s FAIL