? github.com/google/syzkaller/dashboard/dashapi [no test files] ok github.com/google/syzkaller/dashboard/app (cached) # github.com/google/syzkaller/pkg/cover [github.com/google/syzkaller/pkg/cover.test] pkg/cover/manager_to_ci_test.go:34:35: undefined: sampleCoverJSON FAIL github.com/google/syzkaller/pkg/cover [build failed] ? 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/generated [no test files] ? github.com/google/syzkaller/pkg/ifuzz/iset [no test files] ? github.com/google/syzkaller/pkg/ifuzz/powerpc [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] ? 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/freebsd [no test files] ? github.com/google/syzkaller/sys/darwin/gen [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/trusty [no test files] ? github.com/google/syzkaller/sys/trusty/gen [no test files] ? github.com/google/syzkaller/sys/test/gen [no test files] ? github.com/google/syzkaller/sys/windows/gen [no test files] ? github.com/google/syzkaller/sys/windows [no test files] ok github.com/google/syzkaller/executor 15.009s ok github.com/google/syzkaller/pkg/asset (cached) ok github.com/google/syzkaller/pkg/ast 1.338s ok github.com/google/syzkaller/pkg/auth (cached) ok github.com/google/syzkaller/pkg/bisect (cached) ok github.com/google/syzkaller/pkg/bisect/minimize (cached) ok github.com/google/syzkaller/pkg/build (cached) ok github.com/google/syzkaller/pkg/compiler 13.056s ok github.com/google/syzkaller/pkg/config (cached) ok github.com/google/syzkaller/pkg/corpus (cached) ok github.com/google/syzkaller/pkg/cover/backend (cached) ? 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-showprio [no test files] ? github.com/google/syzkaller/tools/syz-symbolize [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-usbgen [no test files] ? github.com/google/syzkaller/tools/syz-upgrade [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/gvisor [no test files] ? github.com/google/syzkaller/vm/gce [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] --- FAIL: TestGenerate (16.73s) --- FAIL: TestGenerate/test/64 (0.00s) testutil.go:33: seed=1711422219478826776 testutil.go:33: seed=1711422219482850983 --- FAIL: TestGenerate/test/64/12 (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:true Trace:false LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}} program: test$length4(&(0x7f0000000000)={0x2, 0x2}) (fail_nth: 1) mutate9(&(0x7f0000000040)='./file0\x00') (async) r0 = test$produce_subtype_of_common() (rerun: 4) test$consume_subtype_of_common(r0) test$length29(&(0x7f0000000080)={'./file0\x00', './file1\x00', 0xa, 0x14, 0x21}) test$length29(&(0x7f00000000c0)={'./file1\x00', './file1\x00', 0xa, 0x14, 0x21}) test$consume_common(r0) test$auto0(0x42, &(0x7f0000000100)={0xc, 0x43, 0x81}, 0xc, 0x7ff) mutate10(&(0x7f0000000140)) test$length29(&(0x7f0000000180)={'./file0\x00', './file0\x00', 0xa, 0x14, 0x21}) syz_compare(&(0x7f0000000000)='&\x00', 0x2, &(0x7f0000000040)=@bf9={0x5, {0x3, 0x9, 0x7}}, 0x4) syz_compare_int$2(0x2, 0x0, 0x8001) syz_errno(0x80) syz_execute_func(&(0x7f0000000080)="4ba503a076b0b1cc5284fab34f3c60fb92550dd848f1224fd762e34c518aa9114f23bbe151530695729d9277fcc0dadaf6bd") syz_exit(0x400) syz_mmap(&(0x7f0000ffb000/0x4000)=nil, 0x4000) syz_sleep_ms(0x8) syz_test_fuzzer1(0x3, 0x10, 0x1) 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_mutate10 #define SYS_mutate10 0 #endif #ifndef SYS_mutate9 #define SYS_mutate9 0 #endif #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[1] = {0x0}; void execute_call(int call) { intptr_t res = 0; switch (call) { case 0: *(uint16_t*)0x20000000 = 2; *(uint16_t*)0x20000002 = 2; inject_fault(1); syscall(SYS_test, /*a0=*/0x20000000ul, 0, 0, 0, 0, 0); break; case 1: memcpy((void*)0x20000040, "./file0\000", 8); syscall(SYS_mutate9, /*filename=*/0x20000040ul); break; case 2: res = syscall(SYS_test, 0, 0, 0, 0, 0, 0); { int i; for(i = 0; i < 4; i++) { syscall(SYS_test, 0, 0, 0, 0, 0, 0); } } if (res != -1) r[0] = res; break; case 3: syscall(SYS_test, /*val=*/r[0], 0, 0, 0, 0, 0); break; case 4: memcpy((void*)0x20000080, "./file0\000\000\000", 10); memcpy((void*)0x2000008a, "./file1\000\000\000\000\000\000\000\000\000\000\000\000\000", 20); *(uint8_t*)0x2000009e = 0xa; *(uint8_t*)0x2000009f = 0x14; *(uint8_t*)0x200000a0 = 0x21; syscall(SYS_test, /*a=*/0x20000080ul, 0, 0, 0, 0, 0); break; case 5: memcpy((void*)0x200000c0, "./file1\000\000\000", 10); memcpy((void*)0x200000ca, "./file1\000\000\000\000\000\000\000\000\000\000\000\000\000", 20); *(uint8_t*)0x200000de = 0xa; *(uint8_t*)0x200000df = 0x14; *(uint8_t*)0x200000e0 = 0x21; syscall(SYS_test, /*a=*/0x200000c0ul, 0, 0, 0, 0, 0); break; case 6: syscall(SYS_test, /*val=*/r[0], 0, 0, 0, 0, 0); break; case 7: *(uint32_t*)0x20000100 = 0xc; *(uint32_t*)0x20000104 = 0x43; *(uint32_t*)0x20000108 = 0x81; syscall(SYS_test, /*a=*/0x42ul, /*b=*/0x20000100ul, /*c=*/0xc, /*d=*/0x7ff, 0, 0); break; case 8: syscall(SYS_mutate10, /*filename=*/0x20000140ul); break; case 9: memcpy((void*)0x20000180, "./file0\000\000\000", 10); memcpy((void*)0x2000018a, "./file0\000\000\000\000\000\000\000\000\000\000\000\000\000", 20); *(uint8_t*)0x2000019e = 0xa; *(uint8_t*)0x2000019f = 0x14; *(uint8_t*)0x200001a0 = 0x21; syscall(SYS_test, /*a=*/0x20000180ul, 0, 0, 0, 0, 0); break; case 10: memcpy((void*)0x20000000, "&\000", 2); *(uint8_t*)0x20000040 = 5; *(uint8_t*)0x20000042 = 3; STORE_BY_BITMASK(uint16_t, , 0x20000042, 9, 8, 4); STORE_BY_BITMASK(uint16_t, , 0x20000042, 7, 12, 4); syz_compare(/*want=*/0x20000000, /*want_len=*/2, /*got=*/0x20000040, /*got_len=*/4); break; case 11: syz_compare_int(/*n=*/2, /*v0=*/0, /*v1=*/0x8001, 0, 0); break; case 12: syz_errno(/*v=*/0x80); break; case 13: memcpy((void*)0x20000080, "\x4b\xa5\x03\xa0\x76\xb0\xb1\xcc\x52\x84\xfa\xb3\x4f\x3c\x60\xfb\x92\x55\x0d\xd8\x48\xf1\x22\x4f\xd7\x62\xe3\x4c\x51\x8a\xa9\x11\x4f\x23\xbb\xe1\x51\x53\x06\x95\x72\x9d\x92\x77\xfc\xc0\xda\xda\xf6\xbd", 50); syz_execute_func(/*text=*/0x20000080); break; case 14: syz_exit(/*status=*/0x400); break; case 15: syz_mmap(/*addr=*/0x20ffb000, /*len=*/0x4000); break; case 16: syz_sleep_ms(/*ms=*/8); break; case 17: syz_test_fuzzer1(/*a=*/3, /*b=*/0x10, /*c=*/1); break; } } int main(void) { syz_mmap(/*addr=*/0x20000000, /*len=*/0x1000000); setup_fault(); use_temporary_dir(); do_sandbox_none(); return 0; } :314:3: error: call to undeclared function 'syscall'; ISO C99 and later do not support implicit function declarations [-Werror,-Wimplicit-function-declaration] syscall(SYS_test, /*a0=*/0x20000000ul, 0, 0, 0, 0, 0); ^ 1 error generated. compiler invocation: c++ [-o /tmp/syz-executor35723342 -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 (1.08s) 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$length4(&(0x7f0000000000)={0x2, 0x2}) (fail_nth: 1) mutate9(&(0x7f0000000040)='./file0\x00') (async) r0 = test$produce_subtype_of_common() (rerun: 4) test$consume_subtype_of_common(r0) test$length29(&(0x7f0000000080)={'./file0\x00', './file1\x00', 0xa, 0x14, 0x21}) test$length29(&(0x7f00000000c0)={'./file1\x00', './file1\x00', 0xa, 0x14, 0x21}) test$consume_common(r0) test$auto0(0x42, &(0x7f0000000100)={0xc, 0x43, 0x81}, 0xc, 0x7ff) mutate10(&(0x7f0000000140)) test$length29(&(0x7f0000000180)={'./file0\x00', './file0\x00', 0xa, 0x14, 0x21}) syz_compare(&(0x7f0000000000)='&\x00', 0x2, &(0x7f0000000040)=@bf9={0x5, {0x3, 0x9, 0x7}}, 0x4) syz_compare_int$2(0x2, 0x0, 0x8001) syz_errno(0x80) syz_execute_func(&(0x7f0000000080)="4ba503a076b0b1cc5284fab34f3c60fb92550dd848f1224fd762e34c518aa9114f23bbe151530695729d9277fcc0dadaf6bd") syz_exit(0x400) syz_mmap(&(0x7f0000ffb000/0x4000)=nil, 0x4000) syz_sleep_ms(0x8) syz_test_fuzzer1(0x3, 0x10, 0x1) 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_mutate10 #define SYS_mutate10 0 #endif #ifndef SYS_mutate9 #define SYS_mutate9 0 #endif #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[1] = {0x0}; void execute_one(void) { intptr_t res = 0; *(uint16_t*)0x20000000 = 2; *(uint16_t*)0x20000002 = 2; inject_fault(1); syscall(SYS_test, /*a0=*/0x20000000ul, 0, 0, 0, 0, 0); memcpy((void*)0x20000040, "./file0\000", 8); syscall(SYS_mutate9, /*filename=*/0x20000040ul); res = syscall(SYS_test, 0, 0, 0, 0, 0, 0); { int i; for(i = 0; i < 4; i++) { syscall(SYS_test, 0, 0, 0, 0, 0, 0); } } if (res != -1) r[0] = res; syscall(SYS_test, /*val=*/r[0], 0, 0, 0, 0, 0); memcpy((void*)0x20000080, "./file0\000\000\000", 10); memcpy((void*)0x2000008a, "./file1\000\000\000\000\000\000\000\000\000\000\000\000\000", 20); *(uint8_t*)0x2000009e = 0xa; *(uint8_t*)0x2000009f = 0x14; *(uint8_t*)0x200000a0 = 0x21; syscall(SYS_test, /*a=*/0x20000080ul, 0, 0, 0, 0, 0); memcpy((void*)0x200000c0, "./file1\000\000\000", 10); memcpy((void*)0x200000ca, "./file1\000\000\000\000\000\000\000\000\000\000\000\000\000", 20); *(uint8_t*)0x200000de = 0xa; *(uint8_t*)0x200000df = 0x14; *(uint8_t*)0x200000e0 = 0x21; syscall(SYS_test, /*a=*/0x200000c0ul, 0, 0, 0, 0, 0); syscall(SYS_test, /*val=*/r[0], 0, 0, 0, 0, 0); *(uint32_t*)0x20000100 = 0xc; *(uint32_t*)0x20000104 = 0x43; *(uint32_t*)0x20000108 = 0x81; syscall(SYS_test, /*a=*/0x42ul, /*b=*/0x20000100ul, /*c=*/0xc, /*d=*/0x7ff, 0, 0); syscall(SYS_mutate10, /*filename=*/0x20000140ul); memcpy((void*)0x20000180, "./file0\000\000\000", 10); memcpy((void*)0x2000018a, "./file0\000\000\000\000\000\000\000\000\000\000\000\000\000", 20); *(uint8_t*)0x2000019e = 0xa; *(uint8_t*)0x2000019f = 0x14; *(uint8_t*)0x200001a0 = 0x21; syscall(SYS_test, /*a=*/0x20000180ul, 0, 0, 0, 0, 0); memcpy((void*)0x20000000, "&\000", 2); *(uint8_t*)0x20000040 = 5; *(uint8_t*)0x20000042 = 3; STORE_BY_BITMASK(uint16_t, , 0x20000042, 9, 8, 4); STORE_BY_BITMASK(uint16_t, , 0x20000042, 7, 12, 4); syz_compare(/*want=*/0x20000000, /*want_len=*/2, /*got=*/0x20000040, /*got_len=*/4); syz_compare_int(/*n=*/2, /*v0=*/0, /*v1=*/0x8001, 0, 0); syz_errno(/*v=*/0x80); memcpy((void*)0x20000080, "\x4b\xa5\x03\xa0\x76\xb0\xb1\xcc\x52\x84\xfa\xb3\x4f\x3c\x60\xfb\x92\x55\x0d\xd8\x48\xf1\x22\x4f\xd7\x62\xe3\x4c\x51\x8a\xa9\x11\x4f\x23\xbb\xe1\x51\x53\x06\x95\x72\x9d\x92\x77\xfc\xc0\xda\xda\xf6\xbd", 50); syz_execute_func(/*text=*/0x20000080); syz_exit(/*status=*/0x400); syz_mmap(/*addr=*/0x20ffb000, /*len=*/0x4000); syz_sleep_ms(/*ms=*/8); syz_test_fuzzer1(/*a=*/3, /*b=*/0x10, /*c=*/1); } int main(void) { syz_mmap(/*addr=*/0x20000000, /*len=*/0x1000000); setup_fault(); use_temporary_dir(); do_sandbox_none(); return 0; } :160:2: error: call to undeclared function 'syscall'; ISO C99 and later do not support implicit function declarations [-Werror,-Wimplicit-function-declaration] syscall(SYS_test, /*a0=*/0x20000000ul, 0, 0, 0, 0, 0); ^ 1 error generated. compiler invocation: c++ [-o /tmp/syz-executor721301518 -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$length4(&(0x7f0000000000)={0x2, 0x2}) (fail_nth: 1) mutate9(&(0x7f0000000040)='./file0\x00') (async) r0 = test$produce_subtype_of_common() (rerun: 4) test$consume_subtype_of_common(r0) test$length29(&(0x7f0000000080)={'./file0\x00', './file1\x00', 0xa, 0x14, 0x21}) test$length29(&(0x7f00000000c0)={'./file1\x00', './file1\x00', 0xa, 0x14, 0x21}) test$consume_common(r0) test$auto0(0x42, &(0x7f0000000100)={0xc, 0x43, 0x81}, 0xc, 0x7ff) mutate10(&(0x7f0000000140)) test$length29(&(0x7f0000000180)={'./file0\x00', './file0\x00', 0xa, 0x14, 0x21}) syz_compare(&(0x7f0000000000)='&\x00', 0x2, &(0x7f0000000040)=@bf9={0x5, {0x3, 0x9, 0x7}}, 0x4) syz_compare_int$2(0x2, 0x0, 0x8001) syz_errno(0x80) syz_execute_func(&(0x7f0000000080)="4ba503a076b0b1cc5284fab34f3c60fb92550dd848f1224fd762e34c518aa9114f23bbe151530695729d9277fcc0dadaf6bd") syz_exit(0x400) syz_mmap(&(0x7f0000ffb000/0x4000)=nil, 0x4000) syz_sleep_ms(0x8) syz_test_fuzzer1(0x3, 0x10, 0x1) 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_mutate10 #define SYS_mutate10 0 #endif #ifndef SYS_mutate9 #define SYS_mutate9 0 #endif #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[1] = {0x0}; void execute_call(int call) { intptr_t res = 0; switch (call) { case 0: *(uint16_t*)0x20000000 = 2; *(uint16_t*)0x20000002 = 2; inject_fault(1); syscall(SYS_test, /*a0=*/0x20000000ul, 0, 0, 0, 0, 0); break; case 1: memcpy((void*)0x20000040, "./file0\000", 8); syscall(SYS_mutate9, /*filename=*/0x20000040ul); break; case 2: res = syscall(SYS_test, 0, 0, 0, 0, 0, 0); { int i; for(i = 0; i < 4; i++) { syscall(SYS_test, 0, 0, 0, 0, 0, 0); } } if (res != -1) r[0] = res; break; case 3: syscall(SYS_test, /*val=*/r[0], 0, 0, 0, 0, 0); break; case 4: memcpy((void*)0x20000080, "./file0\000\000\000", 10); memcpy((void*)0x2000008a, "./file1\000\000\000\000\000\000\000\000\000\000\000\000\000", 20); *(uint8_t*)0x2000009e = 0xa; *(uint8_t*)0x2000009f = 0x14; *(uint8_t*)0x200000a0 = 0x21; syscall(SYS_test, /*a=*/0x20000080ul, 0, 0, 0, 0, 0); break; case 5: memcpy((void*)0x200000c0, "./file1\000\000\000", 10); memcpy((void*)0x200000ca, "./file1\000\000\000\000\000\000\000\000\000\000\000\000\000", 20); *(uint8_t*)0x200000de = 0xa; *(uint8_t*)0x200000df = 0x14; *(uint8_t*)0x200000e0 = 0x21; syscall(SYS_test, /*a=*/0x200000c0ul, 0, 0, 0, 0, 0); break; case 6: syscall(SYS_test, /*val=*/r[0], 0, 0, 0, 0, 0); break; case 7: *(uint32_t*)0x20000100 = 0xc; *(uint32_t*)0x20000104 = 0x43; *(uint32_t*)0x20000108 = 0x81; syscall(SYS_test, /*a=*/0x42ul, /*b=*/0x20000100ul, /*c=*/0xc, /*d=*/0x7ff, 0, 0); break; case 8: syscall(SYS_mutate10, /*filename=*/0x20000140ul); break; case 9: memcpy((void*)0x20000180, "./file0\000\000\000", 10); memcpy((void*)0x2000018a, "./file0\000\000\000\000\000\000\000\000\000\000\000\000\000", 20); *(uint8_t*)0x2000019e = 0xa; *(uint8_t*)0x2000019f = 0x14; *(uint8_t*)0x200001a0 = 0x21; syscall(SYS_test, /*a=*/0x20000180ul, 0, 0, 0, 0, 0); break; case 10: memcpy((void*)0x20000000, "&\000", 2); *(uint8_t*)0x20000040 = 5; *(uint8_t*)0x20000042 = 3; STORE_BY_BITMASK(uint16_t, , 0x20000042, 9, 8, 4); STORE_BY_BITMASK(uint16_t, , 0x20000042, 7, 12, 4); syz_compare(/*want=*/0x20000000, /*want_len=*/2, /*got=*/0x20000040, /*got_len=*/4); break; case 11: syz_compare_int(/*n=*/2, /*v0=*/0, /*v1=*/0x8001, 0, 0); break; case 12: syz_errno(/*v=*/0x80); break; case 13: memcpy((void*)0x20000080, "\x4b\xa5\x03\xa0\x76\xb0\xb1\xcc\x52\x84\xfa\xb3\x4f\x3c\x60\xfb\x92\x55\x0d\xd8\x48\xf1\x22\x4f\xd7\x62\xe3\x4c\x51\x8a\xa9\x11\x4f\x23\xbb\xe1\x51\x53\x06\x95\x72\x9d\x92\x77\xfc\xc0\xda\xda\xf6\xbd", 50); syz_execute_func(/*text=*/0x20000080); break; case 14: syz_exit(/*status=*/0x400); break; case 15: syz_mmap(/*addr=*/0x20ffb000, /*len=*/0x4000); break; case 16: syz_sleep_ms(/*ms=*/8); break; case 17: syz_test_fuzzer1(/*a=*/3, /*b=*/0x10, /*c=*/1); break; } } int main(void) { syz_mmap(/*addr=*/0x20000000, /*len=*/0x1000000); setup_fault(); use_temporary_dir(); do_sandbox_none(); return 0; } :312:3: error: call to undeclared function 'syscall'; ISO C99 and later do not support implicit function declarations [-Werror,-Wimplicit-function-declaration] syscall(SYS_test, /*a0=*/0x20000000ul, 0, 0, 0, 0, 0); ^ 1 error generated. compiler invocation: c++ [-o /tmp/syz-executor3093652582 -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/64/10 (1.23s) 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:false HandleSegv:false Repro:false Trace:false LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}} program: test$length4(&(0x7f0000000000)={0x2, 0x2}) (fail_nth: 1) mutate9(&(0x7f0000000040)='./file0\x00') (async) r0 = test$produce_subtype_of_common() (rerun: 4) test$consume_subtype_of_common(r0) test$length29(&(0x7f0000000080)={'./file0\x00', './file1\x00', 0xa, 0x14, 0x21}) test$length29(&(0x7f00000000c0)={'./file1\x00', './file1\x00', 0xa, 0x14, 0x21}) test$consume_common(r0) test$auto0(0x42, &(0x7f0000000100)={0xc, 0x43, 0x81}, 0xc, 0x7ff) mutate10(&(0x7f0000000140)) test$length29(&(0x7f0000000180)={'./file0\x00', './file0\x00', 0xa, 0x14, 0x21}) syz_compare(&(0x7f0000000000)='&\x00', 0x2, &(0x7f0000000040)=@bf9={0x5, {0x3, 0x9, 0x7}}, 0x4) syz_compare_int$2(0x2, 0x0, 0x8001) syz_errno(0x80) syz_execute_func(&(0x7f0000000080)="4ba503a076b0b1cc5284fab34f3c60fb92550dd848f1224fd762e34c518aa9114f23bbe151530695729d9277fcc0dadaf6bd") syz_exit(0x400) syz_mmap(&(0x7f0000ffb000/0x4000)=nil, 0x4000) syz_sleep_ms(0x8) syz_test_fuzzer1(0x3, 0x10, 0x1) 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 #ifndef SYS_mutate10 #define SYS_mutate10 0 #endif #ifndef SYS_mutate9 #define SYS_mutate9 0 #endif #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 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[1] = {0x0}; void execute_call(int call) { intptr_t res = 0; switch (call) { case 0: *(uint16_t*)0x20000000 = 2; *(uint16_t*)0x20000002 = 2; inject_fault(1); syscall(SYS_test, /*a0=*/0x20000000ul, 0, 0, 0, 0, 0); break; case 1: memcpy((void*)0x20000040, "./file0\000", 8); syscall(SYS_mutate9, /*filename=*/0x20000040ul); break; case 2: res = syscall(SYS_test, 0, 0, 0, 0, 0, 0); { int i; for(i = 0; i < 4; i++) { syscall(SYS_test, 0, 0, 0, 0, 0, 0); } } if (res != -1) r[0] = res; break; case 3: syscall(SYS_test, /*val=*/r[0], 0, 0, 0, 0, 0); break; case 4: memcpy((void*)0x20000080, "./file0\000\000\000", 10); memcpy((void*)0x2000008a, "./file1\000\000\000\000\000\000\000\000\000\000\000\000\000", 20); *(uint8_t*)0x2000009e = 0xa; *(uint8_t*)0x2000009f = 0x14; *(uint8_t*)0x200000a0 = 0x21; syscall(SYS_test, /*a=*/0x20000080ul, 0, 0, 0, 0, 0); break; case 5: memcpy((void*)0x200000c0, "./file1\000\000\000", 10); memcpy((void*)0x200000ca, "./file1\000\000\000\000\000\000\000\000\000\000\000\000\000", 20); *(uint8_t*)0x200000de = 0xa; *(uint8_t*)0x200000df = 0x14; *(uint8_t*)0x200000e0 = 0x21; syscall(SYS_test, /*a=*/0x200000c0ul, 0, 0, 0, 0, 0); break; case 6: syscall(SYS_test, /*val=*/r[0], 0, 0, 0, 0, 0); break; case 7: *(uint32_t*)0x20000100 = 0xc; *(uint32_t*)0x20000104 = 0x43; *(uint32_t*)0x20000108 = 0x81; syscall(SYS_test, /*a=*/0x42ul, /*b=*/0x20000100ul, /*c=*/0xc, /*d=*/0x7ff, 0, 0); break; case 8: syscall(SYS_mutate10, /*filename=*/0x20000140ul); break; case 9: memcpy((void*)0x20000180, "./file0\000\000\000", 10); memcpy((void*)0x2000018a, "./file0\000\000\000\000\000\000\000\000\000\000\000\000\000", 20); *(uint8_t*)0x2000019e = 0xa; *(uint8_t*)0x2000019f = 0x14; *(uint8_t*)0x200001a0 = 0x21; syscall(SYS_test, /*a=*/0x20000180ul, 0, 0, 0, 0, 0); break; case 10: memcpy((void*)0x20000000, "&\000", 2); *(uint8_t*)0x20000040 = 5; *(uint8_t*)0x20000042 = 3; STORE_BY_BITMASK(uint16_t, , 0x20000042, 9, 8, 4); STORE_BY_BITMASK(uint16_t, , 0x20000042, 7, 12, 4); syz_compare(/*want=*/0x20000000, /*want_len=*/2, /*got=*/0x20000040, /*got_len=*/4); break; case 11: syz_compare_int(/*n=*/2, /*v0=*/0, /*v1=*/0x8001, 0, 0); break; case 12: syz_errno(/*v=*/0x80); break; case 13: memcpy((void*)0x20000080, "\x4b\xa5\x03\xa0\x76\xb0\xb1\xcc\x52\x84\xfa\xb3\x4f\x3c\x60\xfb\x92\x55\x0d\xd8\x48\xf1\x22\x4f\xd7\x62\xe3\x4c\x51\x8a\xa9\x11\x4f\x23\xbb\xe1\x51\x53\x06\x95\x72\x9d\x92\x77\xfc\xc0\xda\xda\xf6\xbd", 50); syz_execute_func(/*text=*/0x20000080); break; case 14: syz_exit(/*status=*/0x400); break; case 15: syz_mmap(/*addr=*/0x20ffb000, /*len=*/0x4000); break; case 16: syz_sleep_ms(/*ms=*/8); break; case 17: syz_test_fuzzer1(/*a=*/3, /*b=*/0x10, /*c=*/1); break; } } int main(void) { syz_mmap(/*addr=*/0x20000000, /*len=*/0x1000000); setup_fault(); do_sandbox_none(); return 0; } :299:3: error: call to undeclared function 'syscall'; ISO C99 and later do not support implicit function declarations [-Werror,-Wimplicit-function-declaration] syscall(SYS_test, /*a0=*/0x20000000ul, 0, 0, 0, 0, 0); ^ 1 error generated. compiler invocation: c++ [-o /tmp/syz-executor1222019942 -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 (1.03s) 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$length4(&(0x7f0000000000)={0x2, 0x2}) (fail_nth: 1) mutate9(&(0x7f0000000040)='./file0\x00') (async) r0 = test$produce_subtype_of_common() (rerun: 4) test$consume_subtype_of_common(r0) test$length29(&(0x7f0000000080)={'./file0\x00', './file1\x00', 0xa, 0x14, 0x21}) test$length29(&(0x7f00000000c0)={'./file1\x00', './file1\x00', 0xa, 0x14, 0x21}) test$consume_common(r0) test$auto0(0x42, &(0x7f0000000100)={0xc, 0x43, 0x81}, 0xc, 0x7ff) mutate10(&(0x7f0000000140)) test$length29(&(0x7f0000000180)={'./file0\x00', './file0\x00', 0xa, 0x14, 0x21}) syz_compare(&(0x7f0000000000)='&\x00', 0x2, &(0x7f0000000040)=@bf9={0x5, {0x3, 0x9, 0x7}}, 0x4) syz_compare_int$2(0x2, 0x0, 0x8001) syz_errno(0x80) syz_execute_func(&(0x7f0000000080)="4ba503a076b0b1cc5284fab34f3c60fb92550dd848f1224fd762e34c518aa9114f23bbe151530695729d9277fcc0dadaf6bd") syz_exit(0x400) syz_mmap(&(0x7f0000ffb000/0x4000)=nil, 0x4000) syz_sleep_ms(0x8) syz_test_fuzzer1(0x3, 0x10, 0x1) 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_mutate10 #define SYS_mutate10 0 #endif #ifndef SYS_mutate9 #define SYS_mutate9 0 #endif #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[1] = {0x0}; void execute_call(int call) { intptr_t res = 0; switch (call) { case 0: *(uint16_t*)0x20000000 = 2; *(uint16_t*)0x20000002 = 2; inject_fault(1); syscall(SYS_test, /*a0=*/0x20000000ul, 0, 0, 0, 0, 0); break; case 1: memcpy((void*)0x20000040, "./file0\000", 8); syscall(SYS_mutate9, /*filename=*/0x20000040ul); break; case 2: res = syscall(SYS_test, 0, 0, 0, 0, 0, 0); { int i; for(i = 0; i < 4; i++) { syscall(SYS_test, 0, 0, 0, 0, 0, 0); } } if (res != -1) r[0] = res; break; case 3: syscall(SYS_test, /*val=*/r[0], 0, 0, 0, 0, 0); break; case 4: memcpy((void*)0x20000080, "./file0\000\000\000", 10); memcpy((void*)0x2000008a, "./file1\000\000\000\000\000\000\000\000\000\000\000\000\000", 20); *(uint8_t*)0x2000009e = 0xa; *(uint8_t*)0x2000009f = 0x14; *(uint8_t*)0x200000a0 = 0x21; syscall(SYS_test, /*a=*/0x20000080ul, 0, 0, 0, 0, 0); break; case 5: memcpy((void*)0x200000c0, "./file1\000\000\000", 10); memcpy((void*)0x200000ca, "./file1\000\000\000\000\000\000\000\000\000\000\000\000\000", 20); *(uint8_t*)0x200000de = 0xa; *(uint8_t*)0x200000df = 0x14; *(uint8_t*)0x200000e0 = 0x21; syscall(SYS_test, /*a=*/0x200000c0ul, 0, 0, 0, 0, 0); break; case 6: syscall(SYS_test, /*val=*/r[0], 0, 0, 0, 0, 0); break; case 7: *(uint32_t*)0x20000100 = 0xc; *(uint32_t*)0x20000104 = 0x43; *(uint32_t*)0x20000108 = 0x81; syscall(SYS_test, /*a=*/0x42ul, /*b=*/0x20000100ul, /*c=*/0xc, /*d=*/0x7ff, 0, 0); break; case 8: syscall(SYS_mutate10, /*filename=*/0x20000140ul); break; case 9: memcpy((void*)0x20000180, "./file0\000\000\000", 10); memcpy((void*)0x2000018a, "./file0\000\000\000\000\000\000\000\000\000\000\000\000\000", 20); *(uint8_t*)0x2000019e = 0xa; *(uint8_t*)0x2000019f = 0x14; *(uint8_t*)0x200001a0 = 0x21; syscall(SYS_test, /*a=*/0x20000180ul, 0, 0, 0, 0, 0); break; case 10: memcpy((void*)0x20000000, "&\000", 2); *(uint8_t*)0x20000040 = 5; *(uint8_t*)0x20000042 = 3; STORE_BY_BITMASK(uint16_t, , 0x20000042, 9, 8, 4); STORE_BY_BITMASK(uint16_t, , 0x20000042, 7, 12, 4); syz_compare(/*want=*/0x20000000, /*want_len=*/2, /*got=*/0x20000040, /*got_len=*/4); break; case 11: syz_compare_int(/*n=*/2, /*v0=*/0, /*v1=*/0x8001, 0, 0); break; case 12: syz_errno(/*v=*/0x80); break; case 13: memcpy((void*)0x20000080, "\x4b\xa5\x03\xa0\x76\xb0\xb1\xcc\x52\x84\xfa\xb3\x4f\x3c\x60\xfb\x92\x55\x0d\xd8\x48\xf1\x22\x4f\xd7\x62\xe3\x4c\x51\x8a\xa9\x11\x4f\x23\xbb\xe1\x51\x53\x06\x95\x72\x9d\x92\x77\xfc\xc0\xda\xda\xf6\xbd", 50); syz_execute_func(/*text=*/0x20000080); break; case 14: syz_exit(/*status=*/0x400); break; case 15: syz_mmap(/*addr=*/0x20ffb000, /*len=*/0x4000); break; case 16: syz_sleep_ms(/*ms=*/8); break; case 17: syz_test_fuzzer1(/*a=*/3, /*b=*/0x10, /*c=*/1); break; } } int main(void) { syz_mmap(/*addr=*/0x20000000, /*len=*/0x1000000); setup_fault(); use_temporary_dir(); do_sandbox_none(); return 0; } :312:3: error: call to undeclared function 'syscall'; ISO C99 and later do not support implicit function declarations [-Werror,-Wimplicit-function-declaration] syscall(SYS_test, /*a0=*/0x20000000ul, 0, 0, 0, 0, 0); ^ 1 error generated. compiler invocation: c++ [-o /tmp/syz-executor280671573 -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 (1.14s) 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$length4(&(0x7f0000000000)={0x2, 0x2}) (fail_nth: 1) mutate9(&(0x7f0000000040)='./file0\x00') (async) r0 = test$produce_subtype_of_common() (rerun: 4) test$consume_subtype_of_common(r0) test$length29(&(0x7f0000000080)={'./file0\x00', './file1\x00', 0xa, 0x14, 0x21}) test$length29(&(0x7f00000000c0)={'./file1\x00', './file1\x00', 0xa, 0x14, 0x21}) test$consume_common(r0) test$auto0(0x42, &(0x7f0000000100)={0xc, 0x43, 0x81}, 0xc, 0x7ff) mutate10(&(0x7f0000000140)) test$length29(&(0x7f0000000180)={'./file0\x00', './file0\x00', 0xa, 0x14, 0x21}) syz_compare(&(0x7f0000000000)='&\x00', 0x2, &(0x7f0000000040)=@bf9={0x5, {0x3, 0x9, 0x7}}, 0x4) syz_compare_int$2(0x2, 0x0, 0x8001) syz_errno(0x80) syz_execute_func(&(0x7f0000000080)="4ba503a076b0b1cc5284fab34f3c60fb92550dd848f1224fd762e34c518aa9114f23bbe151530695729d9277fcc0dadaf6bd") syz_exit(0x400) syz_mmap(&(0x7f0000ffb000/0x4000)=nil, 0x4000) syz_sleep_ms(0x8) syz_test_fuzzer1(0x3, 0x10, 0x1) 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_mutate10 #define SYS_mutate10 0 #endif #ifndef SYS_mutate9 #define SYS_mutate9 0 #endif #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[1] = {0x0}; void execute_call(int call) { intptr_t res = 0; switch (call) { case 0: *(uint16_t*)0x20000000 = 2; *(uint16_t*)0x20000002 = 2; inject_fault(1); syscall(SYS_test, /*a0=*/0x20000000ul, 0, 0, 0, 0, 0); break; case 1: memcpy((void*)0x20000040, "./file0\000", 8); syscall(SYS_mutate9, /*filename=*/0x20000040ul); break; case 2: res = syscall(SYS_test, 0, 0, 0, 0, 0, 0); { int i; for(i = 0; i < 4; i++) { syscall(SYS_test, 0, 0, 0, 0, 0, 0); } } if (res != -1) r[0] = res; break; case 3: syscall(SYS_test, /*val=*/r[0], 0, 0, 0, 0, 0); break; case 4: memcpy((void*)0x20000080, "./file0\000\000\000", 10); memcpy((void*)0x2000008a, "./file1\000\000\000\000\000\000\000\000\000\000\000\000\000", 20); *(uint8_t*)0x2000009e = 0xa; *(uint8_t*)0x2000009f = 0x14; *(uint8_t*)0x200000a0 = 0x21; syscall(SYS_test, /*a=*/0x20000080ul, 0, 0, 0, 0, 0); break; case 5: memcpy((void*)0x200000c0, "./file1\000\000\000", 10); memcpy((void*)0x200000ca, "./file1\000\000\000\000\000\000\000\000\000\000\000\000\000", 20); *(uint8_t*)0x200000de = 0xa; *(uint8_t*)0x200000df = 0x14; *(uint8_t*)0x200000e0 = 0x21; syscall(SYS_test, /*a=*/0x200000c0ul, 0, 0, 0, 0, 0); break; case 6: syscall(SYS_test, /*val=*/r[0], 0, 0, 0, 0, 0); break; case 7: *(uint32_t*)0x20000100 = 0xc; *(uint32_t*)0x20000104 = 0x43; *(uint32_t*)0x20000108 = 0x81; syscall(SYS_test, /*a=*/0x42ul, /*b=*/0x20000100ul, /*c=*/0xc, /*d=*/0x7ff, 0, 0); break; case 8: syscall(SYS_mutate10, /*filename=*/0x20000140ul); break; case 9: memcpy((void*)0x20000180, "./file0\000\000\000", 10); memcpy((void*)0x2000018a, "./file0\000\000\000\000\000\000\000\000\000\000\000\000\000", 20); *(uint8_t*)0x2000019e = 0xa; *(uint8_t*)0x2000019f = 0x14; *(uint8_t*)0x200001a0 = 0x21; syscall(SYS_test, /*a=*/0x20000180ul, 0, 0, 0, 0, 0); break; case 10: memcpy((void*)0x20000000, "&\000", 2); *(uint8_t*)0x20000040 = 5; *(uint8_t*)0x20000042 = 3; STORE_BY_BITMASK(uint16_t, , 0x20000042, 9, 8, 4); STORE_BY_BITMASK(uint16_t, , 0x20000042, 7, 12, 4); syz_compare(/*want=*/0x20000000, /*want_len=*/2, /*got=*/0x20000040, /*got_len=*/4); break; case 11: syz_compare_int(/*n=*/2, /*v0=*/0, /*v1=*/0x8001, 0, 0); break; case 12: syz_errno(/*v=*/0x80); break; case 13: memcpy((void*)0x20000080, "\x4b\xa5\x03\xa0\x76\xb0\xb1\xcc\x52\x84\xfa\xb3\x4f\x3c\x60\xfb\x92\x55\x0d\xd8\x48\xf1\x22\x4f\xd7\x62\xe3\x4c\x51\x8a\xa9\x11\x4f\x23\xbb\xe1\x51\x53\x06\x95\x72\x9d\x92\x77\xfc\xc0\xda\xda\xf6\xbd", 50); syz_execute_func(/*text=*/0x20000080); break; case 14: syz_exit(/*status=*/0x400); break; case 15: syz_mmap(/*addr=*/0x20ffb000, /*len=*/0x4000); break; case 16: syz_sleep_ms(/*ms=*/8); break; case 17: syz_test_fuzzer1(/*a=*/3, /*b=*/0x10, /*c=*/1); break; } } int main(void) { syz_mmap(/*addr=*/0x20000000, /*len=*/0x1000000); setup_fault(); use_temporary_dir(); do_sandbox_none(); return 0; } :312:3: error: call to undeclared function 'syscall'; ISO C99 and later do not support implicit function declarations [-Werror,-Wimplicit-function-declaration] syscall(SYS_test, /*a0=*/0x20000000ul, 0, 0, 0, 0, 0); ^ 1 error generated. compiler invocation: c++ [-o /tmp/syz-executor3272715239 -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 (1.26s) csource_test.go:150: opts: {Threaded:true Repeat:true RepeatTimes:0 Procs:0 Slowdown:1 Sandbox: 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$length4(&(0x7f0000000000)={0x2, 0x2}) (fail_nth: 1) mutate9(&(0x7f0000000040)='./file0\x00') (async) r0 = test$produce_subtype_of_common() (rerun: 4) test$consume_subtype_of_common(r0) test$length29(&(0x7f0000000080)={'./file0\x00', './file1\x00', 0xa, 0x14, 0x21}) test$length29(&(0x7f00000000c0)={'./file1\x00', './file1\x00', 0xa, 0x14, 0x21}) test$consume_common(r0) test$auto0(0x42, &(0x7f0000000100)={0xc, 0x43, 0x81}, 0xc, 0x7ff) mutate10(&(0x7f0000000140)) test$length29(&(0x7f0000000180)={'./file0\x00', './file0\x00', 0xa, 0x14, 0x21}) syz_compare(&(0x7f0000000000)='&\x00', 0x2, &(0x7f0000000040)=@bf9={0x5, {0x3, 0x9, 0x7}}, 0x4) syz_compare_int$2(0x2, 0x0, 0x8001) syz_errno(0x80) syz_execute_func(&(0x7f0000000080)="4ba503a076b0b1cc5284fab34f3c60fb92550dd848f1224fd762e34c518aa9114f23bbe151530695729d9277fcc0dadaf6bd") syz_exit(0x400) syz_mmap(&(0x7f0000ffb000/0x4000)=nil, 0x4000) syz_sleep_ms(0x8) syz_test_fuzzer1(0x3, 0x10, 0x1) 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_mutate10 #define SYS_mutate10 0 #endif #ifndef SYS_mutate9 #define SYS_mutate9 0 #endif #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 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[1] = {0x0}; void execute_call(int call) { intptr_t res = 0; switch (call) { case 0: *(uint16_t*)0x20000000 = 2; *(uint16_t*)0x20000002 = 2; inject_fault(1); syscall(SYS_test, /*a0=*/0x20000000ul, 0, 0, 0, 0, 0); break; case 1: memcpy((void*)0x20000040, "./file0\000", 8); syscall(SYS_mutate9, /*filename=*/0x20000040ul); break; case 2: res = syscall(SYS_test, 0, 0, 0, 0, 0, 0); { int i; for(i = 0; i < 4; i++) { syscall(SYS_test, 0, 0, 0, 0, 0, 0); } } if (res != -1) r[0] = res; break; case 3: syscall(SYS_test, /*val=*/r[0], 0, 0, 0, 0, 0); break; case 4: memcpy((void*)0x20000080, "./file0\000\000\000", 10); memcpy((void*)0x2000008a, "./file1\000\000\000\000\000\000\000\000\000\000\000\000\000", 20); *(uint8_t*)0x2000009e = 0xa; *(uint8_t*)0x2000009f = 0x14; *(uint8_t*)0x200000a0 = 0x21; syscall(SYS_test, /*a=*/0x20000080ul, 0, 0, 0, 0, 0); break; case 5: memcpy((void*)0x200000c0, "./file1\000\000\000", 10); memcpy((void*)0x200000ca, "./file1\000\000\000\000\000\000\000\000\000\000\000\000\000", 20); *(uint8_t*)0x200000de = 0xa; *(uint8_t*)0x200000df = 0x14; *(uint8_t*)0x200000e0 = 0x21; syscall(SYS_test, /*a=*/0x200000c0ul, 0, 0, 0, 0, 0); break; case 6: syscall(SYS_test, /*val=*/r[0], 0, 0, 0, 0, 0); break; case 7: *(uint32_t*)0x20000100 = 0xc; *(uint32_t*)0x20000104 = 0x43; *(uint32_t*)0x20000108 = 0x81; syscall(SYS_test, /*a=*/0x42ul, /*b=*/0x20000100ul, /*c=*/0xc, /*d=*/0x7ff, 0, 0); break; case 8: syscall(SYS_mutate10, /*filename=*/0x20000140ul); break; case 9: memcpy((void*)0x20000180, "./file0\000\000\000", 10); memcpy((void*)0x2000018a, "./file0\000\000\000\000\000\000\000\000\000\000\000\000\000", 20); *(uint8_t*)0x2000019e = 0xa; *(uint8_t*)0x2000019f = 0x14; *(uint8_t*)0x200001a0 = 0x21; syscall(SYS_test, /*a=*/0x20000180ul, 0, 0, 0, 0, 0); break; case 10: memcpy((void*)0x20000000, "&\000", 2); *(uint8_t*)0x20000040 = 5; *(uint8_t*)0x20000042 = 3; STORE_BY_BITMASK(uint16_t, , 0x20000042, 9, 8, 4); STORE_BY_BITMASK(uint16_t, , 0x20000042, 7, 12, 4); syz_compare(/*want=*/0x20000000, /*want_len=*/2, /*got=*/0x20000040, /*got_len=*/4); break; case 11: syz_compare_int(/*n=*/2, /*v0=*/0, /*v1=*/0x8001, 0, 0); break; case 12: syz_errno(/*v=*/0x80); break; case 13: memcpy((void*)0x20000080, "\x4b\xa5\x03\xa0\x76\xb0\xb1\xcc\x52\x84\xfa\xb3\x4f\x3c\x60\xfb\x92\x55\x0d\xd8\x48\xf1\x22\x4f\xd7\x62\xe3\x4c\x51\x8a\xa9\x11\x4f\x23\xbb\xe1\x51\x53\x06\x95\x72\x9d\x92\x77\xfc\xc0\xda\xda\xf6\xbd", 50); syz_execute_func(/*text=*/0x20000080); break; case 14: syz_exit(/*status=*/0x400); break; case 15: syz_mmap(/*addr=*/0x20ffb000, /*len=*/0x4000); break; case 16: syz_sleep_ms(/*ms=*/8); break; case 17: syz_test_fuzzer1(/*a=*/3, /*b=*/0x10, /*c=*/1); break; } } int main(void) { syz_mmap(/*addr=*/0x20000000, /*len=*/0x1000000); setup_fault(); use_temporary_dir(); loop(); return 0; } :305:3: error: call to undeclared function 'syscall'; ISO C99 and later do not support implicit function declarations [-Werror,-Wimplicit-function-declaration] syscall(SYS_test, /*a0=*/0x20000000ul, 0, 0, 0, 0, 0); ^ 1 error generated. compiler invocation: c++ [-o /tmp/syz-executor1543496257 -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 (1.31s) 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$length4(&(0x7f0000000000)={0x2, 0x2}) (fail_nth: 1) mutate9(&(0x7f0000000040)='./file0\x00') (async) r0 = test$produce_subtype_of_common() (rerun: 4) test$consume_subtype_of_common(r0) test$length29(&(0x7f0000000080)={'./file0\x00', './file1\x00', 0xa, 0x14, 0x21}) test$length29(&(0x7f00000000c0)={'./file1\x00', './file1\x00', 0xa, 0x14, 0x21}) test$consume_common(r0) test$auto0(0x42, &(0x7f0000000100)={0xc, 0x43, 0x81}, 0xc, 0x7ff) mutate10(&(0x7f0000000140)) test$length29(&(0x7f0000000180)={'./file0\x00', './file0\x00', 0xa, 0x14, 0x21}) syz_compare(&(0x7f0000000000)='&\x00', 0x2, &(0x7f0000000040)=@bf9={0x5, {0x3, 0x9, 0x7}}, 0x4) syz_compare_int$2(0x2, 0x0, 0x8001) syz_errno(0x80) syz_execute_func(&(0x7f0000000080)="4ba503a076b0b1cc5284fab34f3c60fb92550dd848f1224fd762e34c518aa9114f23bbe151530695729d9277fcc0dadaf6bd") syz_exit(0x400) syz_mmap(&(0x7f0000ffb000/0x4000)=nil, 0x4000) syz_sleep_ms(0x8) syz_test_fuzzer1(0x3, 0x10, 0x1) 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_mutate10 #define SYS_mutate10 0 #endif #ifndef SYS_mutate9 #define SYS_mutate9 0 #endif #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[1] = {0x0}; void execute_call(int call) { intptr_t res = 0; switch (call) { case 0: *(uint16_t*)0x20000000 = 2; *(uint16_t*)0x20000002 = 2; inject_fault(1); syscall(SYS_test, /*a0=*/0x20000000ul, 0, 0, 0, 0, 0); break; case 1: memcpy((void*)0x20000040, "./file0\000", 8); syscall(SYS_mutate9, /*filename=*/0x20000040ul); break; case 2: res = syscall(SYS_test, 0, 0, 0, 0, 0, 0); { int i; for(i = 0; i < 4; i++) { syscall(SYS_test, 0, 0, 0, 0, 0, 0); } } if (res != -1) r[0] = res; break; case 3: syscall(SYS_test, /*val=*/r[0], 0, 0, 0, 0, 0); break; case 4: memcpy((void*)0x20000080, "./file0\000\000\000", 10); memcpy((void*)0x2000008a, "./file1\000\000\000\000\000\000\000\000\000\000\000\000\000", 20); *(uint8_t*)0x2000009e = 0xa; *(uint8_t*)0x2000009f = 0x14; *(uint8_t*)0x200000a0 = 0x21; syscall(SYS_test, /*a=*/0x20000080ul, 0, 0, 0, 0, 0); break; case 5: memcpy((void*)0x200000c0, "./file1\000\000\000", 10); memcpy((void*)0x200000ca, "./file1\000\000\000\000\000\000\000\000\000\000\000\000\000", 20); *(uint8_t*)0x200000de = 0xa; *(uint8_t*)0x200000df = 0x14; *(uint8_t*)0x200000e0 = 0x21; syscall(SYS_test, /*a=*/0x200000c0ul, 0, 0, 0, 0, 0); break; case 6: syscall(SYS_test, /*val=*/r[0], 0, 0, 0, 0, 0); break; case 7: *(uint32_t*)0x20000100 = 0xc; *(uint32_t*)0x20000104 = 0x43; *(uint32_t*)0x20000108 = 0x81; syscall(SYS_test, /*a=*/0x42ul, /*b=*/0x20000100ul, /*c=*/0xc, /*d=*/0x7ff, 0, 0); break; case 8: syscall(SYS_mutate10, /*filename=*/0x20000140ul); break; case 9: memcpy((void*)0x20000180, "./file0\000\000\000", 10); memcpy((void*)0x2000018a, "./file0\000\000\000\000\000\000\000\000\000\000\000\000\000", 20); *(uint8_t*)0x2000019e = 0xa; *(uint8_t*)0x2000019f = 0x14; *(uint8_t*)0x200001a0 = 0x21; syscall(SYS_test, /*a=*/0x20000180ul, 0, 0, 0, 0, 0); break; case 10: memcpy((void*)0x20000000, "&\000", 2); *(uint8_t*)0x20000040 = 5; *(uint8_t*)0x20000042 = 3; STORE_BY_BITMASK(uint16_t, , 0x20000042, 9, 8, 4); STORE_BY_BITMASK(uint16_t, , 0x20000042, 7, 12, 4); syz_compare(/*want=*/0x20000000, /*want_len=*/2, /*got=*/0x20000040, /*got_len=*/4); break; case 11: syz_compare_int(/*n=*/2, /*v0=*/0, /*v1=*/0x8001, 0, 0); break; case 12: syz_errno(/*v=*/0x80); break; case 13: memcpy((void*)0x20000080, "\x4b\xa5\x03\xa0\x76\xb0\xb1\xcc\x52\x84\xfa\xb3\x4f\x3c\x60\xfb\x92\x55\x0d\xd8\x48\xf1\x22\x4f\xd7\x62\xe3\x4c\x51\x8a\xa9\x11\x4f\x23\xbb\xe1\x51\x53\x06\x95\x72\x9d\x92\x77\xfc\xc0\xda\xda\xf6\xbd", 50); syz_execute_func(/*text=*/0x20000080); break; case 14: syz_exit(/*status=*/0x400); break; case 15: syz_mmap(/*addr=*/0x20ffb000, /*len=*/0x4000); break; case 16: syz_sleep_ms(/*ms=*/8); break; case 17: syz_test_fuzzer1(/*a=*/3, /*b=*/0x10, /*c=*/1); break; } } int main(void) { syz_mmap(/*addr=*/0x20000000, /*len=*/0x1000000); setup_fault(); use_temporary_dir(); do_sandbox_none(); return 0; } :312:3: error: call to undeclared function 'syscall'; ISO C99 and later do not support implicit function declarations [-Werror,-Wimplicit-function-declaration] syscall(SYS_test, /*a0=*/0x20000000ul, 0, 0, 0, 0, 0); ^ 1 error generated. compiler invocation: c++ [-o /tmp/syz-executor3091674105 -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/64/4 (1.16s) csource_test.go:150: opts: {Threaded:true Repeat:true RepeatTimes:0 Procs:1 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$length4(&(0x7f0000000000)={0x2, 0x2}) (fail_nth: 1) mutate9(&(0x7f0000000040)='./file0\x00') (async) r0 = test$produce_subtype_of_common() (rerun: 4) test$consume_subtype_of_common(r0) test$length29(&(0x7f0000000080)={'./file0\x00', './file1\x00', 0xa, 0x14, 0x21}) test$length29(&(0x7f00000000c0)={'./file1\x00', './file1\x00', 0xa, 0x14, 0x21}) test$consume_common(r0) test$auto0(0x42, &(0x7f0000000100)={0xc, 0x43, 0x81}, 0xc, 0x7ff) mutate10(&(0x7f0000000140)) test$length29(&(0x7f0000000180)={'./file0\x00', './file0\x00', 0xa, 0x14, 0x21}) syz_compare(&(0x7f0000000000)='&\x00', 0x2, &(0x7f0000000040)=@bf9={0x5, {0x3, 0x9, 0x7}}, 0x4) syz_compare_int$2(0x2, 0x0, 0x8001) syz_errno(0x80) syz_execute_func(&(0x7f0000000080)="4ba503a076b0b1cc5284fab34f3c60fb92550dd848f1224fd762e34c518aa9114f23bbe151530695729d9277fcc0dadaf6bd") syz_exit(0x400) syz_mmap(&(0x7f0000ffb000/0x4000)=nil, 0x4000) syz_sleep_ms(0x8) syz_test_fuzzer1(0x3, 0x10, 0x1) 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_mutate10 #define SYS_mutate10 0 #endif #ifndef SYS_mutate9 #define SYS_mutate9 0 #endif #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[1] = {0x0}; void execute_call(int call) { intptr_t res = 0; switch (call) { case 0: *(uint16_t*)0x20000000 = 2; *(uint16_t*)0x20000002 = 2; inject_fault(1); syscall(SYS_test, /*a0=*/0x20000000ul, 0, 0, 0, 0, 0); break; case 1: memcpy((void*)0x20000040, "./file0\000", 8); syscall(SYS_mutate9, /*filename=*/0x20000040ul); break; case 2: res = syscall(SYS_test, 0, 0, 0, 0, 0, 0); { int i; for(i = 0; i < 4; i++) { syscall(SYS_test, 0, 0, 0, 0, 0, 0); } } if (res != -1) r[0] = res; break; case 3: syscall(SYS_test, /*val=*/r[0], 0, 0, 0, 0, 0); break; case 4: memcpy((void*)0x20000080, "./file0\000\000\000", 10); memcpy((void*)0x2000008a, "./file1\000\000\000\000\000\000\000\000\000\000\000\000\000", 20); *(uint8_t*)0x2000009e = 0xa; *(uint8_t*)0x2000009f = 0x14; *(uint8_t*)0x200000a0 = 0x21; syscall(SYS_test, /*a=*/0x20000080ul, 0, 0, 0, 0, 0); break; case 5: memcpy((void*)0x200000c0, "./file1\000\000\000", 10); memcpy((void*)0x200000ca, "./file1\000\000\000\000\000\000\000\000\000\000\000\000\000", 20); *(uint8_t*)0x200000de = 0xa; *(uint8_t*)0x200000df = 0x14; *(uint8_t*)0x200000e0 = 0x21; syscall(SYS_test, /*a=*/0x200000c0ul, 0, 0, 0, 0, 0); break; case 6: syscall(SYS_test, /*val=*/r[0], 0, 0, 0, 0, 0); break; case 7: *(uint32_t*)0x20000100 = 0xc; *(uint32_t*)0x20000104 = 0x43; *(uint32_t*)0x20000108 = 0x81; syscall(SYS_test, /*a=*/0x42ul, /*b=*/0x20000100ul, /*c=*/0xc, /*d=*/0x7ff, 0, 0); break; case 8: syscall(SYS_mutate10, /*filename=*/0x20000140ul); break; case 9: memcpy((void*)0x20000180, "./file0\000\000\000", 10); memcpy((void*)0x2000018a, "./file0\000\000\000\000\000\000\000\000\000\000\000\000\000", 20); *(uint8_t*)0x2000019e = 0xa; *(uint8_t*)0x2000019f = 0x14; *(uint8_t*)0x200001a0 = 0x21; syscall(SYS_test, /*a=*/0x20000180ul, 0, 0, 0, 0, 0); break; case 10: memcpy((void*)0x20000000, "&\000", 2); *(uint8_t*)0x20000040 = 5; *(uint8_t*)0x20000042 = 3; STORE_BY_BITMASK(uint16_t, , 0x20000042, 9, 8, 4); STORE_BY_BITMASK(uint16_t, , 0x20000042, 7, 12, 4); syz_compare(/*want=*/0x20000000, /*want_len=*/2, /*got=*/0x20000040, /*got_len=*/4); break; case 11: syz_compare_int(/*n=*/2, /*v0=*/0, /*v1=*/0x8001, 0, 0); break; case 12: syz_errno(/*v=*/0x80); break; case 13: memcpy((void*)0x20000080, "\x4b\xa5\x03\xa0\x76\xb0\xb1\xcc\x52\x84\xfa\xb3\x4f\x3c\x60\xfb\x92\x55\x0d\xd8\x48\xf1\x22\x4f\xd7\x62\xe3\x4c\x51\x8a\xa9\x11\x4f\x23\xbb\xe1\x51\x53\x06\x95\x72\x9d\x92\x77\xfc\xc0\xda\xda\xf6\xbd", 50); syz_execute_func(/*text=*/0x20000080); break; case 14: syz_exit(/*status=*/0x400); break; case 15: syz_mmap(/*addr=*/0x20ffb000, /*len=*/0x4000); break; case 16: syz_sleep_ms(/*ms=*/8); break; case 17: syz_test_fuzzer1(/*a=*/3, /*b=*/0x10, /*c=*/1); break; } } int main(void) { syz_mmap(/*addr=*/0x20000000, /*len=*/0x1000000); setup_fault(); use_temporary_dir(); do_sandbox_none(); return 0; } :312:3: error: call to undeclared function 'syscall'; ISO C99 and later do not support implicit function declarations [-Werror,-Wimplicit-function-declaration] syscall(SYS_test, /*a0=*/0x20000000ul, 0, 0, 0, 0, 0); ^ 1 error generated. compiler invocation: c++ [-o /tmp/syz-executor72068314 -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 (0.98s) 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$length4(&(0x7f0000000000)={0x2, 0x2}) (fail_nth: 1) mutate9(&(0x7f0000000040)='./file0\x00') (async) r0 = test$produce_subtype_of_common() (rerun: 4) test$consume_subtype_of_common(r0) test$length29(&(0x7f0000000080)={'./file0\x00', './file1\x00', 0xa, 0x14, 0x21}) test$length29(&(0x7f00000000c0)={'./file1\x00', './file1\x00', 0xa, 0x14, 0x21}) test$consume_common(r0) test$auto0(0x42, &(0x7f0000000100)={0xc, 0x43, 0x81}, 0xc, 0x7ff) mutate10(&(0x7f0000000140)) test$length29(&(0x7f0000000180)={'./file0\x00', './file0\x00', 0xa, 0x14, 0x21}) syz_compare(&(0x7f0000000000)='&\x00', 0x2, &(0x7f0000000040)=@bf9={0x5, {0x3, 0x9, 0x7}}, 0x4) syz_compare_int$2(0x2, 0x0, 0x8001) syz_errno(0x80) syz_execute_func(&(0x7f0000000080)="4ba503a076b0b1cc5284fab34f3c60fb92550dd848f1224fd762e34c518aa9114f23bbe151530695729d9277fcc0dadaf6bd") syz_exit(0x400) syz_mmap(&(0x7f0000ffb000/0x4000)=nil, 0x4000) syz_sleep_ms(0x8) syz_test_fuzzer1(0x3, 0x10, 0x1) 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_mutate10 #define SYS_mutate10 0 #endif #ifndef SYS_mutate9 #define SYS_mutate9 0 #endif #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[1] = {0x0}; void execute_call(int call) { intptr_t res = 0; switch (call) { case 0: *(uint16_t*)0x20000000 = 2; *(uint16_t*)0x20000002 = 2; inject_fault(1); syscall(SYS_test, /*a0=*/0x20000000ul, 0, 0, 0, 0, 0); break; case 1: memcpy((void*)0x20000040, "./file0\000", 8); syscall(SYS_mutate9, /*filename=*/0x20000040ul); break; case 2: res = syscall(SYS_test, 0, 0, 0, 0, 0, 0); { int i; for(i = 0; i < 4; i++) { syscall(SYS_test, 0, 0, 0, 0, 0, 0); } } if (res != -1) r[0] = res; break; case 3: syscall(SYS_test, /*val=*/r[0], 0, 0, 0, 0, 0); break; case 4: memcpy((void*)0x20000080, "./file0\000\000\000", 10); memcpy((void*)0x2000008a, "./file1\000\000\000\000\000\000\000\000\000\000\000\000\000", 20); *(uint8_t*)0x2000009e = 0xa; *(uint8_t*)0x2000009f = 0x14; *(uint8_t*)0x200000a0 = 0x21; syscall(SYS_test, /*a=*/0x20000080ul, 0, 0, 0, 0, 0); break; case 5: memcpy((void*)0x200000c0, "./file1\000\000\000", 10); memcpy((void*)0x200000ca, "./file1\000\000\000\000\000\000\000\000\000\000\000\000\000", 20); *(uint8_t*)0x200000de = 0xa; *(uint8_t*)0x200000df = 0x14; *(uint8_t*)0x200000e0 = 0x21; syscall(SYS_test, /*a=*/0x200000c0ul, 0, 0, 0, 0, 0); break; case 6: syscall(SYS_test, /*val=*/r[0], 0, 0, 0, 0, 0); break; case 7: *(uint32_t*)0x20000100 = 0xc; *(uint32_t*)0x20000104 = 0x43; *(uint32_t*)0x20000108 = 0x81; syscall(SYS_test, /*a=*/0x42ul, /*b=*/0x20000100ul, /*c=*/0xc, /*d=*/0x7ff, 0, 0); break; case 8: syscall(SYS_mutate10, /*filename=*/0x20000140ul); break; case 9: memcpy((void*)0x20000180, "./file0\000\000\000", 10); memcpy((void*)0x2000018a, "./file0\000\000\000\000\000\000\000\000\000\000\000\000\000", 20); *(uint8_t*)0x2000019e = 0xa; *(uint8_t*)0x2000019f = 0x14; *(uint8_t*)0x200001a0 = 0x21; syscall(SYS_test, /*a=*/0x20000180ul, 0, 0, 0, 0, 0); break; case 10: memcpy((void*)0x20000000, "&\000", 2); *(uint8_t*)0x20000040 = 5; *(uint8_t*)0x20000042 = 3; STORE_BY_BITMASK(uint16_t, , 0x20000042, 9, 8, 4); STORE_BY_BITMASK(uint16_t, , 0x20000042, 7, 12, 4); syz_compare(/*want=*/0x20000000, /*want_len=*/2, /*got=*/0x20000040, /*got_len=*/4); break; case 11: syz_compare_int(/*n=*/2, /*v0=*/0, /*v1=*/0x8001, 0, 0); break; case 12: syz_errno(/*v=*/0x80); break; case 13: memcpy((void*)0x20000080, "\x4b\xa5\x03\xa0\x76\xb0\xb1\xcc\x52\x84\xfa\xb3\x4f\x3c\x60\xfb\x92\x55\x0d\xd8\x48\xf1\x22\x4f\xd7\x62\xe3\x4c\x51\x8a\xa9\x11\x4f\x23\xbb\xe1\x51\x53\x06\x95\x72\x9d\x92\x77\xfc\xc0\xda\xda\xf6\xbd", 50); syz_execute_func(/*text=*/0x20000080); break; case 14: syz_exit(/*status=*/0x400); break; case 15: syz_mmap(/*addr=*/0x20ffb000, /*len=*/0x4000); break; case 16: syz_sleep_ms(/*ms=*/8); break; case 17: syz_test_fuzzer1(/*a=*/3, /*b=*/0x10, /*c=*/1); 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; } :316:3: error: call to undeclared function 'syscall'; ISO C99 and later do not support implicit function declarations [-Werror,-Wimplicit-function-declaration] syscall(SYS_test, /*a0=*/0x20000000ul, 0, 0, 0, 0, 0); ^ 1 error generated. compiler invocation: c++ [-o /tmp/syz-executor2663420772 -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 (1.12s) csource_test.go:148: --- FAIL: TestGenerate/test/64/5 (1.30s) csource_test.go:148: --- FAIL: TestGenerate/test/64/1 (0.81s) csource_test.go:148: --- FAIL: TestGenerate/test/64/13 (1.13s) csource_test.go:148: FAIL FAIL github.com/google/syzkaller/pkg/csource 26.500s ok github.com/google/syzkaller/pkg/db (cached) ok github.com/google/syzkaller/pkg/email (cached) ok github.com/google/syzkaller/pkg/email/lore (cached) ok github.com/google/syzkaller/pkg/fuzzer (cached) ok github.com/google/syzkaller/pkg/gce (cached) ok github.com/google/syzkaller/pkg/host (cached) 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 (cached) ok github.com/google/syzkaller/pkg/ipc (cached) 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 (cached) ok github.com/google/syzkaller/pkg/osutil (cached) ok github.com/google/syzkaller/pkg/report (cached) ok github.com/google/syzkaller/pkg/repro (cached) ok github.com/google/syzkaller/pkg/runtest (cached) 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 (cached) ok github.com/google/syzkaller/pkg/subsystem/lists (cached) ok github.com/google/syzkaller/pkg/symbolizer (cached) ok github.com/google/syzkaller/pkg/tool (cached) ok github.com/google/syzkaller/pkg/vcs (cached) ok github.com/google/syzkaller/prog (cached) 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 (cached) ok github.com/google/syzkaller/syz-fuzzer 0.216s ok github.com/google/syzkaller/syz-hub (cached) ok github.com/google/syzkaller/syz-hub/state (cached) ok github.com/google/syzkaller/syz-manager 8.217s ok github.com/google/syzkaller/syz-verifier (cached) ok github.com/google/syzkaller/tools/syz-kconf (cached) ok github.com/google/syzkaller/tools/syz-linter (cached) ok github.com/google/syzkaller/tools/syz-testbed (cached) 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 (cached) ok github.com/google/syzkaller/vm/isolated (cached) ok github.com/google/syzkaller/vm/proxyapp (cached) ok github.com/google/syzkaller/vm/vmimpl (cached) FAIL