? github.com/google/syzkaller/dashboard/dashapi [no test files] ok github.com/google/syzkaller/dashboard/app (cached) ? 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/iset [no test files] ? github.com/google/syzkaller/pkg/ifuzz/powerpc/generated [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] ok github.com/google/syzkaller/executor 15.856s ok github.com/google/syzkaller/pkg/asset (cached) ok github.com/google/syzkaller/pkg/ast 1.362s 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 13.111s ok github.com/google/syzkaller/pkg/config (cached) ok github.com/google/syzkaller/pkg/corpus (cached) ok github.com/google/syzkaller/pkg/cover (cached) ok github.com/google/syzkaller/pkg/cover/backend (cached) ? 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/freebsd [no test files] ? github.com/google/syzkaller/sys/darwin [no test files] ? github.com/google/syzkaller/sys/darwin/gen [no test files] ? github.com/google/syzkaller/sys/freebsd/gen [no test files] ? github.com/google/syzkaller/sys/fuchsia [no test files] ? github.com/google/syzkaller/sys/fuchsia/fidlgen [no test files] ? github.com/google/syzkaller/sys/fuchsia/gen [no test files] ? github.com/google/syzkaller/sys/fuchsia/layout [no test files] ? github.com/google/syzkaller/sys/linux/gen [no test files] ? github.com/google/syzkaller/sys/netbsd/gen [no test files] ? github.com/google/syzkaller/sys/openbsd/gen [no test files] ? github.com/google/syzkaller/sys/syz-extract [no test files] ? github.com/google/syzkaller/sys/syz-sysgen [no test files] ? github.com/google/syzkaller/sys/targets [no test files] ? github.com/google/syzkaller/sys/test [no test files] ? github.com/google/syzkaller/sys/test/gen [no test files] ? github.com/google/syzkaller/sys/trusty [no test files] ? github.com/google/syzkaller/sys/trusty/gen [no test files] ? github.com/google/syzkaller/sys/windows [no test files] ? github.com/google/syzkaller/sys/windows/gen [no test files] ? github.com/google/syzkaller/syz-runner [no test files] ? github.com/google/syzkaller/tools/syz-benchcmp [no test files] ? github.com/google/syzkaller/tools/syz-bisect [no test files] ? github.com/google/syzkaller/tools/syz-build [no test files] ? github.com/google/syzkaller/tools/syz-check [no test files] ? github.com/google/syzkaller/tools/syz-cover [no test files] ? github.com/google/syzkaller/tools/syz-crush [no test files] ? github.com/google/syzkaller/tools/syz-db [no test files] ? github.com/google/syzkaller/tools/syz-expand [no test files] ? github.com/google/syzkaller/tools/syz-execprog [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-showprio [no test files] ? github.com/google/syzkaller/tools/syz-stress [no test files] ? github.com/google/syzkaller/tools/syz-symbolize [no test files] --- FAIL: TestGenerate (22.47s) --- FAIL: TestGenerate/test/64 (0.01s) testutil.go:33: seed=1712314171957703679 testutil.go:33: seed=1712314171967579538 --- FAIL: TestGenerate/test/64/0 (1.36s) 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$length9(&(0x7f0000000000)={&(0x7f0000ffb000/0x2000)=nil, 0x2000}) (fail_nth: 1) syz_mmap(&(0x7f0000ffc000/0x1000)=nil, 0x1000) (async) test$vma0(&(0x7f0000ffc000/0x1000)=nil, 0x1000, &(0x7f0000ff8000/0x5000)=nil, 0x5000, &(0x7f0000ff4000/0x9000)=nil, 0x9000) (rerun: 4) test$vma0(&(0x7f0000ff8000/0x2000)=nil, 0x2000, &(0x7f0000ffa000/0x5000)=nil, 0x5000, &(0x7f0000ff8000/0x8000)=nil, 0x8000) test$length0(&(0x7f0000000040)={0x0, 0x2}) test$length10(&(0x7f0000ff4000/0x4000)=nil, 0x4000, 0x4000, 0x2000, 0x1000) test$length10(&(0x7f0000ffd000/0x3000)=nil, 0x3000, 0x3000, 0x1800, 0xc00) test$opt2(0x0) test$str2(&(0x7f0000000080)='bar\x00') test$opt2(&(0x7f0000ff7000/0x2000)=nil) syz_compare(&(0x7f0000000000)='!/\x00', 0x3, &(0x7f0000000040)=@bf15={0x5c, {0x2, 0x4, 0x4}}, 0x8) syz_compare_int$2(0x2, 0x6, 0x8) syz_errno(0x6) syz_execute_func(&(0x7f0000000080)="882b1f021c62706eb46a65c15699e520056b4acb14fe3174d5f8c90afa893cc1d9eb629e4081f2cb6a2c8f4c8f0668fdbeac") syz_exit(0x4) syz_mmap(&(0x7f0000ffa000/0x3000)=nil, 0x3000) syz_sleep_ms(0x1f) syz_test_fuzzer1(0x4, 0x8, 0x0) csource_test.go:151: failed to build program: // autogenerated by syzkaller (https://github.com/google/syzkaller) #define _GNU_SOURCE #include #include #include #include #include #include #include #include #include #include #ifndef SYS_test #define SYS_test 0 #endif static void sleep_ms(uint64_t ms) { usleep(ms * 1000); } static void use_temporary_dir(void) { char tmpdir_template[] = "./syzkaller.XXXXXX"; char* tmpdir = mkdtemp(tmpdir_template); if (!tmpdir) exit(1); if (chmod(tmpdir, 0777)) exit(1); if (chdir(tmpdir)) exit(1); } static int inject_fault(int nth) { return 0; } static void setup_fault() { } #define BITMASK(bf_off,bf_len) (((1ull << (bf_len)) - 1) << (bf_off)) #define STORE_BY_BITMASK(type,htobe,addr,val,bf_off,bf_len) *(type*)(addr) = htobe((htobe(*(type*)(addr)) & ~BITMASK((bf_off), (bf_len))) | (((type)(val) << (bf_off)) & BITMASK((bf_off), (bf_len)))) static long syz_mmap(volatile long a0, volatile long a1) { return (long)mmap((void*)a0, a1, PROT_READ | PROT_WRITE, MAP_ANON | MAP_PRIVATE | MAP_FIXED, -1, 0); } static long syz_errno(volatile long v) { errno = v; return v == 0 ? 0 : -1; } static long syz_exit(volatile long status) { _exit(status); return 0; } static long syz_sleep_ms(volatile long ms) { sleep_ms(ms); return 0; } static long syz_compare(volatile long want, volatile long want_len, volatile long got, volatile long got_len) { if (want_len != got_len) { errno = EBADF; goto error; } if (memcmp((void*)want, (void*)got, want_len)) { errno = EINVAL; goto error; } return 0; error: return -1; } static long syz_compare_int(volatile long n, ...) { va_list args; va_start(args, n); long v0 = va_arg(args, long); long v1 = va_arg(args, long); long v2 = va_arg(args, long); long v3 = va_arg(args, long); va_end(args); if (n < 2 || n > 4) return errno = E2BIG, -1; if (n <= 2 && v2 != 0) return errno = EFAULT, -1; if (n <= 3 && v3 != 0) return errno = EFAULT, -1; if (v0 != v1) return errno = EINVAL, -1; if (n > 2 && v0 != v2) return errno = EINVAL, -1; if (n > 3 && v0 != v3) return errno = EINVAL, -1; return 0; } static void loop(); static int do_sandbox_none(void) { loop(); return 0; } static void fake_crash(const char* name) { exit(1); exit(1); } static long syz_test_fuzzer1(volatile long a, volatile long b, volatile long c) { if (a == 1 && b == 1 && c == 1) fake_crash("first bug"); if (a == 1 && b == 2 && c == 3) fake_crash("second bug"); return 0; } static long syz_execute_func(volatile long text) { ((void (*)(void))(text))(); return 0; } static void execute_one(void); static void loop(void) { execute_one(); } void execute_one(void) { *(uint64_t*)0x20000000 = 0x20ffb000; *(uint64_t*)0x20000008 = 0x2000; inject_fault(1); syscall(SYS_test, /*a0=*/0x20000000ul, 0, 0, 0, 0, 0); syz_mmap(/*addr=*/0x20ffc000, /*len=*/0x1000); syscall(SYS_test, /*v0=*/0x20ffc000ul, /*l0=*/0, /*v1=*/0x20ff8000ul, /*l1=*/0x5000, /*v2=*/0x20ff4000ul, /*l2=*/0x9000ul); { int i; for(i = 0; i < 4; i++) { syscall(SYS_test, /*v0=*/0x20ffc000ul, /*l0=*/0, /*v1=*/0x20ff8000ul, /*l1=*/0x5000, /*v2=*/0x20ff4000ul, /*l2=*/0x9000ul); } } syscall(SYS_test, /*v0=*/0x20ff8000ul, /*l0=*/0, /*v1=*/0x20ffa000ul, /*l1=*/0x5000, /*v2=*/0x20ff8000ul, /*l2=*/0x8000ul); *(uint16_t*)0x20000040 = 0; *(uint16_t*)0x20000042 = 2; syscall(SYS_test, /*a0=*/0x20000040ul, 0, 0, 0, 0, 0); syscall(SYS_test, /*a0=*/0x20ff4000ul, /*a1=*/0, /*a2=*/0x4000, /*a3=*/0x2000, /*a4=*/0x1000ul, 0); syscall(SYS_test, /*a0=*/0x20ffd000ul, /*a1=*/0, /*a2=*/0x3000, /*a3=*/0x1800, /*a4=*/0xc00ul, 0); syscall(SYS_test, /*a0=*/0ul, 0, 0, 0, 0, 0); memcpy((void*)0x20000080, "bar\000", 4); syscall(SYS_test, /*a=*/0x20000080ul, 0, 0, 0, 0, 0); syscall(SYS_test, /*a0=*/0x20ff7000ul, 0, 0, 0, 0, 0); memcpy((void*)0x20000000, "!/\000", 3); *(uint8_t*)0x20000040 = 0x5c; *(uint8_t*)0x20000044 = 2; STORE_BY_BITMASK(uint32_t, , 0x20000044, 4, 8, 12); STORE_BY_BITMASK(uint16_t, , 0x20000046, 4, 4, 4); syz_compare(/*want=*/0x20000000, /*want_len=*/3, /*got=*/0x20000040, /*got_len=*/8); syz_compare_int(/*n=*/2, /*v0=*/6, /*v1=*/8, 0, 0); syz_errno(/*v=*/6); memcpy((void*)0x20000080, "\x88\x2b\x1f\x02\x1c\x62\x70\x6e\xb4\x6a\x65\xc1\x56\x99\xe5\x20\x05\x6b\x4a\xcb\x14\xfe\x31\x74\xd5\xf8\xc9\x0a\xfa\x89\x3c\xc1\xd9\xeb\x62\x9e\x40\x81\xf2\xcb\x6a\x2c\x8f\x4c\x8f\x06\x68\xfd\xbe\xac", 50); syz_execute_func(/*text=*/0x20000080); syz_exit(/*status=*/4); syz_mmap(/*addr=*/0x20ffa000, /*len=*/0x3000); syz_sleep_ms(/*ms=*/0x1f); syz_test_fuzzer1(/*a=*/4, /*b=*/8, /*c=*/0); } int main(void) { syz_mmap(/*addr=*/0x20000000, /*len=*/0x1000000); setup_fault(); use_temporary_dir(); do_sandbox_none(); return 0; } :151:2: 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-executor1216078681 -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 (1.58s) 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$length9(&(0x7f0000000000)={&(0x7f0000ffb000/0x2000)=nil, 0x2000}) (fail_nth: 1) syz_mmap(&(0x7f0000ffc000/0x1000)=nil, 0x1000) (async) test$vma0(&(0x7f0000ffc000/0x1000)=nil, 0x1000, &(0x7f0000ff8000/0x5000)=nil, 0x5000, &(0x7f0000ff4000/0x9000)=nil, 0x9000) (rerun: 4) test$vma0(&(0x7f0000ff8000/0x2000)=nil, 0x2000, &(0x7f0000ffa000/0x5000)=nil, 0x5000, &(0x7f0000ff8000/0x8000)=nil, 0x8000) test$length0(&(0x7f0000000040)={0x0, 0x2}) test$length10(&(0x7f0000ff4000/0x4000)=nil, 0x4000, 0x4000, 0x2000, 0x1000) test$length10(&(0x7f0000ffd000/0x3000)=nil, 0x3000, 0x3000, 0x1800, 0xc00) test$opt2(0x0) test$str2(&(0x7f0000000080)='bar\x00') test$opt2(&(0x7f0000ff7000/0x2000)=nil) syz_compare(&(0x7f0000000000)='!/\x00', 0x3, &(0x7f0000000040)=@bf15={0x5c, {0x2, 0x4, 0x4}}, 0x8) syz_compare_int$2(0x2, 0x6, 0x8) syz_errno(0x6) syz_execute_func(&(0x7f0000000080)="882b1f021c62706eb46a65c15699e520056b4acb14fe3174d5f8c90afa893cc1d9eb629e4081f2cb6a2c8f4c8f0668fdbeac") syz_exit(0x4) syz_mmap(&(0x7f0000ffa000/0x3000)=nil, 0x3000) syz_sleep_ms(0x1f) syz_test_fuzzer1(0x4, 0x8, 0x0) csource_test.go:151: failed to build program: // autogenerated by syzkaller (https://github.com/google/syzkaller) #define _GNU_SOURCE #include #include #include #include #include #include #include #include #include #include #include #include #ifndef SYS_test #define SYS_test 0 #endif static void sleep_ms(uint64_t ms) { usleep(ms * 1000); } static uint64_t current_time_ms(void) { struct timespec ts; if (clock_gettime(CLOCK_MONOTONIC, &ts)) exit(1); return (uint64_t)ts.tv_sec * 1000 + (uint64_t)ts.tv_nsec / 1000000; } static void use_temporary_dir(void) { char tmpdir_template[] = "./syzkaller.XXXXXX"; char* tmpdir = mkdtemp(tmpdir_template); if (!tmpdir) exit(1); if (chmod(tmpdir, 0777)) exit(1); if (chdir(tmpdir)) exit(1); } static int inject_fault(int nth) { return 0; } static void setup_fault() { } static void thread_start(void* (*fn)(void*), void* arg) { pthread_t th; pthread_attr_t attr; pthread_attr_init(&attr); pthread_attr_setstacksize(&attr, 128 << 10); int i = 0; for (; i < 100; i++) { if (pthread_create(&th, &attr, fn, arg) == 0) { pthread_attr_destroy(&attr); return; } if (errno == EAGAIN) { usleep(50); continue; } break; } exit(1); } typedef struct { pthread_mutex_t mu; pthread_cond_t cv; int state; } event_t; static void event_init(event_t* ev) { if (pthread_mutex_init(&ev->mu, 0)) exit(1); if (pthread_cond_init(&ev->cv, 0)) exit(1); ev->state = 0; } static void event_reset(event_t* ev) { ev->state = 0; } static void event_set(event_t* ev) { pthread_mutex_lock(&ev->mu); if (ev->state) exit(1); ev->state = 1; pthread_mutex_unlock(&ev->mu); pthread_cond_broadcast(&ev->cv); } static void event_wait(event_t* ev) { pthread_mutex_lock(&ev->mu); while (!ev->state) pthread_cond_wait(&ev->cv, &ev->mu); pthread_mutex_unlock(&ev->mu); } static int event_isset(event_t* ev) { pthread_mutex_lock(&ev->mu); int res = ev->state; pthread_mutex_unlock(&ev->mu); return res; } static int event_timedwait(event_t* ev, uint64_t timeout) { uint64_t start = current_time_ms(); uint64_t now = start; pthread_mutex_lock(&ev->mu); for (;;) { if (ev->state) break; uint64_t remain = timeout - (now - start); struct timespec ts; ts.tv_sec = remain / 1000; ts.tv_nsec = (remain % 1000) * 1000 * 1000; pthread_cond_timedwait(&ev->cv, &ev->mu, &ts); now = current_time_ms(); if (now - start > timeout) break; } int res = ev->state; pthread_mutex_unlock(&ev->mu); return res; } #define BITMASK(bf_off,bf_len) (((1ull << (bf_len)) - 1) << (bf_off)) #define STORE_BY_BITMASK(type,htobe,addr,val,bf_off,bf_len) *(type*)(addr) = htobe((htobe(*(type*)(addr)) & ~BITMASK((bf_off), (bf_len))) | (((type)(val) << (bf_off)) & BITMASK((bf_off), (bf_len)))) static long syz_mmap(volatile long a0, volatile long a1) { return (long)mmap((void*)a0, a1, PROT_READ | PROT_WRITE, MAP_ANON | MAP_PRIVATE | MAP_FIXED, -1, 0); } static long syz_errno(volatile long v) { errno = v; return v == 0 ? 0 : -1; } static long syz_exit(volatile long status) { _exit(status); return 0; } static long syz_sleep_ms(volatile long ms) { sleep_ms(ms); return 0; } static long syz_compare(volatile long want, volatile long want_len, volatile long got, volatile long got_len) { if (want_len != got_len) { errno = EBADF; goto error; } if (memcmp((void*)want, (void*)got, want_len)) { errno = EINVAL; goto error; } return 0; error: return -1; } static long syz_compare_int(volatile long n, ...) { va_list args; va_start(args, n); long v0 = va_arg(args, long); long v1 = va_arg(args, long); long v2 = va_arg(args, long); long v3 = va_arg(args, long); va_end(args); if (n < 2 || n > 4) return errno = E2BIG, -1; if (n <= 2 && v2 != 0) return errno = EFAULT, -1; if (n <= 3 && v3 != 0) return errno = EFAULT, -1; if (v0 != v1) return errno = EINVAL, -1; if (n > 2 && v0 != v2) return errno = EINVAL, -1; if (n > 3 && v0 != v3) return errno = EINVAL, -1; return 0; } static void loop(); static int do_sandbox_none(void) { loop(); return 0; } static void fake_crash(const char* name) { exit(1); exit(1); } static long syz_test_fuzzer1(volatile long a, volatile long b, volatile long c) { if (a == 1 && b == 1 && c == 1) fake_crash("first bug"); if (a == 1 && b == 2 && c == 3) fake_crash("second bug"); return 0; } static long syz_execute_func(volatile long text) { ((void (*)(void))(text))(); return 0; } struct thread_t { int created, call; event_t ready, done; }; static struct thread_t threads[16]; static void execute_call(int call); static int running; static void* thr(void* arg) { struct thread_t* th = (struct thread_t*)arg; for (;;) { event_wait(&th->ready); event_reset(&th->ready); execute_call(th->call); __atomic_fetch_sub(&running, 1, __ATOMIC_RELAXED); event_set(&th->done); } return 0; } static void execute_one(void) { int i, call, thread; for (call = 0; call < 18; call++) { for (thread = 0; thread < (int)(sizeof(threads) / sizeof(threads[0])); thread++) { struct thread_t* th = &threads[thread]; if (!th->created) { th->created = 1; event_init(&th->ready); event_init(&th->done); event_set(&th->done); thread_start(thr, th); } if (!event_isset(&th->done)) continue; event_reset(&th->done); th->call = call; __atomic_fetch_add(&running, 1, __ATOMIC_RELAXED); event_set(&th->ready); if (call == 1) break; event_timedwait(&th->done, 500); break; } } for (i = 0; i < 100 && __atomic_load_n(&running, __ATOMIC_RELAXED); i++) sleep_ms(1); } static void execute_one(void); static void loop(void) { execute_one(); } void execute_call(int call) { switch (call) { case 0: *(uint64_t*)0x20000000 = 0x20ffb000; *(uint64_t*)0x20000008 = 0x2000; inject_fault(1); syscall(SYS_test, /*a0=*/0x20000000ul, 0, 0, 0, 0, 0); break; case 1: syz_mmap(/*addr=*/0x20ffc000, /*len=*/0x1000); break; case 2: syscall(SYS_test, /*v0=*/0x20ffc000ul, /*l0=*/0, /*v1=*/0x20ff8000ul, /*l1=*/0x5000, /*v2=*/0x20ff4000ul, /*l2=*/0x9000ul); { int i; for(i = 0; i < 4; i++) { syscall(SYS_test, /*v0=*/0x20ffc000ul, /*l0=*/0, /*v1=*/0x20ff8000ul, /*l1=*/0x5000, /*v2=*/0x20ff4000ul, /*l2=*/0x9000ul); } } break; case 3: syscall(SYS_test, /*v0=*/0x20ff8000ul, /*l0=*/0, /*v1=*/0x20ffa000ul, /*l1=*/0x5000, /*v2=*/0x20ff8000ul, /*l2=*/0x8000ul); break; case 4: *(uint16_t*)0x20000040 = 0; *(uint16_t*)0x20000042 = 2; syscall(SYS_test, /*a0=*/0x20000040ul, 0, 0, 0, 0, 0); break; case 5: syscall(SYS_test, /*a0=*/0x20ff4000ul, /*a1=*/0, /*a2=*/0x4000, /*a3=*/0x2000, /*a4=*/0x1000ul, 0); break; case 6: syscall(SYS_test, /*a0=*/0x20ffd000ul, /*a1=*/0, /*a2=*/0x3000, /*a3=*/0x1800, /*a4=*/0xc00ul, 0); break; case 7: syscall(SYS_test, /*a0=*/0ul, 0, 0, 0, 0, 0); break; case 8: memcpy((void*)0x20000080, "bar\000", 4); syscall(SYS_test, /*a=*/0x20000080ul, 0, 0, 0, 0, 0); break; case 9: syscall(SYS_test, /*a0=*/0x20ff7000ul, 0, 0, 0, 0, 0); break; case 10: memcpy((void*)0x20000000, "!/\000", 3); *(uint8_t*)0x20000040 = 0x5c; *(uint8_t*)0x20000044 = 2; STORE_BY_BITMASK(uint32_t, , 0x20000044, 4, 8, 12); STORE_BY_BITMASK(uint16_t, , 0x20000046, 4, 4, 4); syz_compare(/*want=*/0x20000000, /*want_len=*/3, /*got=*/0x20000040, /*got_len=*/8); break; case 11: syz_compare_int(/*n=*/2, /*v0=*/6, /*v1=*/8, 0, 0); break; case 12: syz_errno(/*v=*/6); break; case 13: memcpy((void*)0x20000080, "\x88\x2b\x1f\x02\x1c\x62\x70\x6e\xb4\x6a\x65\xc1\x56\x99\xe5\x20\x05\x6b\x4a\xcb\x14\xfe\x31\x74\xd5\xf8\xc9\x0a\xfa\x89\x3c\xc1\xd9\xeb\x62\x9e\x40\x81\xf2\xcb\x6a\x2c\x8f\x4c\x8f\x06\x68\xfd\xbe\xac", 50); syz_execute_func(/*text=*/0x20000080); break; case 14: syz_exit(/*status=*/4); break; case 15: syz_mmap(/*addr=*/0x20ffa000, /*len=*/0x3000); break; case 16: syz_sleep_ms(/*ms=*/0x1f); break; case 17: syz_test_fuzzer1(/*a=*/4, /*b=*/8, /*c=*/0); break; } } int main(void) { syz_mmap(/*addr=*/0x20000000, /*len=*/0x1000000); setup_fault(); use_temporary_dir(); do_sandbox_none(); return 0; } :303:3: 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-executor2906906915 -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 (1.47s) 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$length9(&(0x7f0000000000)={&(0x7f0000ffb000/0x2000)=nil, 0x2000}) (fail_nth: 1) syz_mmap(&(0x7f0000ffc000/0x1000)=nil, 0x1000) (async) test$vma0(&(0x7f0000ffc000/0x1000)=nil, 0x1000, &(0x7f0000ff8000/0x5000)=nil, 0x5000, &(0x7f0000ff4000/0x9000)=nil, 0x9000) (rerun: 4) test$vma0(&(0x7f0000ff8000/0x2000)=nil, 0x2000, &(0x7f0000ffa000/0x5000)=nil, 0x5000, &(0x7f0000ff8000/0x8000)=nil, 0x8000) test$length0(&(0x7f0000000040)={0x0, 0x2}) test$length10(&(0x7f0000ff4000/0x4000)=nil, 0x4000, 0x4000, 0x2000, 0x1000) test$length10(&(0x7f0000ffd000/0x3000)=nil, 0x3000, 0x3000, 0x1800, 0xc00) test$opt2(0x0) test$str2(&(0x7f0000000080)='bar\x00') test$opt2(&(0x7f0000ff7000/0x2000)=nil) syz_compare(&(0x7f0000000000)='!/\x00', 0x3, &(0x7f0000000040)=@bf15={0x5c, {0x2, 0x4, 0x4}}, 0x8) syz_compare_int$2(0x2, 0x6, 0x8) syz_errno(0x6) syz_execute_func(&(0x7f0000000080)="882b1f021c62706eb46a65c15699e520056b4acb14fe3174d5f8c90afa893cc1d9eb629e4081f2cb6a2c8f4c8f0668fdbeac") syz_exit(0x4) syz_mmap(&(0x7f0000ffa000/0x3000)=nil, 0x3000) syz_sleep_ms(0x1f) syz_test_fuzzer1(0x4, 0x8, 0x0) 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_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(); } void execute_call(int call) { switch (call) { case 0: *(uint64_t*)0x20000000 = 0x20ffb000; *(uint64_t*)0x20000008 = 0x2000; inject_fault(1); syscall(SYS_test, /*a0=*/0x20000000ul, 0, 0, 0, 0, 0); break; case 1: syz_mmap(/*addr=*/0x20ffc000, /*len=*/0x1000); break; case 2: syscall(SYS_test, /*v0=*/0x20ffc000ul, /*l0=*/0, /*v1=*/0x20ff8000ul, /*l1=*/0x5000, /*v2=*/0x20ff4000ul, /*l2=*/0x9000ul); { int i; for(i = 0; i < 4; i++) { syscall(SYS_test, /*v0=*/0x20ffc000ul, /*l0=*/0, /*v1=*/0x20ff8000ul, /*l1=*/0x5000, /*v2=*/0x20ff4000ul, /*l2=*/0x9000ul); } } break; case 3: syscall(SYS_test, /*v0=*/0x20ff8000ul, /*l0=*/0, /*v1=*/0x20ffa000ul, /*l1=*/0x5000, /*v2=*/0x20ff8000ul, /*l2=*/0x8000ul); break; case 4: *(uint16_t*)0x20000040 = 0; *(uint16_t*)0x20000042 = 2; syscall(SYS_test, /*a0=*/0x20000040ul, 0, 0, 0, 0, 0); break; case 5: syscall(SYS_test, /*a0=*/0x20ff4000ul, /*a1=*/0, /*a2=*/0x4000, /*a3=*/0x2000, /*a4=*/0x1000ul, 0); break; case 6: syscall(SYS_test, /*a0=*/0x20ffd000ul, /*a1=*/0, /*a2=*/0x3000, /*a3=*/0x1800, /*a4=*/0xc00ul, 0); break; case 7: syscall(SYS_test, /*a0=*/0ul, 0, 0, 0, 0, 0); break; case 8: memcpy((void*)0x20000080, "bar\000", 4); syscall(SYS_test, /*a=*/0x20000080ul, 0, 0, 0, 0, 0); break; case 9: syscall(SYS_test, /*a0=*/0x20ff7000ul, 0, 0, 0, 0, 0); break; case 10: memcpy((void*)0x20000000, "!/\000", 3); *(uint8_t*)0x20000040 = 0x5c; *(uint8_t*)0x20000044 = 2; STORE_BY_BITMASK(uint32_t, , 0x20000044, 4, 8, 12); STORE_BY_BITMASK(uint16_t, , 0x20000046, 4, 4, 4); syz_compare(/*want=*/0x20000000, /*want_len=*/3, /*got=*/0x20000040, /*got_len=*/8); break; case 11: syz_compare_int(/*n=*/2, /*v0=*/6, /*v1=*/8, 0, 0); break; case 12: syz_errno(/*v=*/6); break; case 13: memcpy((void*)0x20000080, "\x88\x2b\x1f\x02\x1c\x62\x70\x6e\xb4\x6a\x65\xc1\x56\x99\xe5\x20\x05\x6b\x4a\xcb\x14\xfe\x31\x74\xd5\xf8\xc9\x0a\xfa\x89\x3c\xc1\xd9\xeb\x62\x9e\x40\x81\xf2\xcb\x6a\x2c\x8f\x4c\x8f\x06\x68\xfd\xbe\xac", 50); syz_execute_func(/*text=*/0x20000080); break; case 14: syz_exit(/*status=*/4); break; case 15: syz_mmap(/*addr=*/0x20ffa000, /*len=*/0x3000); break; case 16: syz_sleep_ms(/*ms=*/0x1f); break; case 17: syz_test_fuzzer1(/*a=*/4, /*b=*/8, /*c=*/0); break; } } int main(void) { syz_mmap(/*addr=*/0x20000000, /*len=*/0x1000000); setup_fault(); do_sandbox_none(); return 0; } :290:3: 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-executor1541570069 -DGOOS_test=1 -DGOARCH_64=1 -DHOSTGOOS_openbsd=1 -x c - -m64 -lutil -O2 -pthread -Wall -Werror -Wparentheses -Wunused-const-variable -Wframe-larger-than=16384 -Wno-array-bounds -Wno-unused-but-set-variable -Wno-unused-command-line-argument -no-pie -fno-exceptions] --- FAIL: TestGenerate/test/64/12 (1.85s) 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$length9(&(0x7f0000000000)={&(0x7f0000ffb000/0x2000)=nil, 0x2000}) (fail_nth: 1) syz_mmap(&(0x7f0000ffc000/0x1000)=nil, 0x1000) (async) test$vma0(&(0x7f0000ffc000/0x1000)=nil, 0x1000, &(0x7f0000ff8000/0x5000)=nil, 0x5000, &(0x7f0000ff4000/0x9000)=nil, 0x9000) (rerun: 4) test$vma0(&(0x7f0000ff8000/0x2000)=nil, 0x2000, &(0x7f0000ffa000/0x5000)=nil, 0x5000, &(0x7f0000ff8000/0x8000)=nil, 0x8000) test$length0(&(0x7f0000000040)={0x0, 0x2}) test$length10(&(0x7f0000ff4000/0x4000)=nil, 0x4000, 0x4000, 0x2000, 0x1000) test$length10(&(0x7f0000ffd000/0x3000)=nil, 0x3000, 0x3000, 0x1800, 0xc00) test$opt2(0x0) test$str2(&(0x7f0000000080)='bar\x00') test$opt2(&(0x7f0000ff7000/0x2000)=nil) syz_compare(&(0x7f0000000000)='!/\x00', 0x3, &(0x7f0000000040)=@bf15={0x5c, {0x2, 0x4, 0x4}}, 0x8) syz_compare_int$2(0x2, 0x6, 0x8) syz_errno(0x6) syz_execute_func(&(0x7f0000000080)="882b1f021c62706eb46a65c15699e520056b4acb14fe3174d5f8c90afa893cc1d9eb629e4081f2cb6a2c8f4c8f0668fdbeac") syz_exit(0x4) syz_mmap(&(0x7f0000ffa000/0x3000)=nil, 0x3000) syz_sleep_ms(0x1f) syz_test_fuzzer1(0x4, 0x8, 0x0) csource_test.go:151: failed to build program: // autogenerated by syzkaller (https://github.com/google/syzkaller) #define _GNU_SOURCE #include #include #include #include #include #include #include #include #include #include #include #include #ifndef SYS_test #define SYS_test 0 #endif static void sleep_ms(uint64_t ms) { usleep(ms * 1000); } static uint64_t current_time_ms(void) { struct timespec ts; if (clock_gettime(CLOCK_MONOTONIC, &ts)) exit(1); return (uint64_t)ts.tv_sec * 1000 + (uint64_t)ts.tv_nsec / 1000000; } static void use_temporary_dir(void) { char tmpdir_template[] = "./syzkaller.XXXXXX"; char* tmpdir = mkdtemp(tmpdir_template); if (!tmpdir) exit(1); if (chmod(tmpdir, 0777)) exit(1); if (chdir(tmpdir)) exit(1); } static int inject_fault(int nth) { return 0; } static void setup_fault() { } static void thread_start(void* (*fn)(void*), void* arg) { pthread_t th; pthread_attr_t attr; pthread_attr_init(&attr); pthread_attr_setstacksize(&attr, 128 << 10); int i = 0; for (; i < 100; i++) { if (pthread_create(&th, &attr, fn, arg) == 0) { pthread_attr_destroy(&attr); return; } if (errno == EAGAIN) { usleep(50); continue; } break; } exit(1); } typedef struct { pthread_mutex_t mu; pthread_cond_t cv; int state; } event_t; static void event_init(event_t* ev) { if (pthread_mutex_init(&ev->mu, 0)) exit(1); if (pthread_cond_init(&ev->cv, 0)) exit(1); ev->state = 0; } static void event_reset(event_t* ev) { ev->state = 0; } static void event_set(event_t* ev) { pthread_mutex_lock(&ev->mu); if (ev->state) exit(1); ev->state = 1; pthread_mutex_unlock(&ev->mu); pthread_cond_broadcast(&ev->cv); } static void event_wait(event_t* ev) { pthread_mutex_lock(&ev->mu); while (!ev->state) pthread_cond_wait(&ev->cv, &ev->mu); pthread_mutex_unlock(&ev->mu); } static int event_isset(event_t* ev) { pthread_mutex_lock(&ev->mu); int res = ev->state; pthread_mutex_unlock(&ev->mu); return res; } static int event_timedwait(event_t* ev, uint64_t timeout) { uint64_t start = current_time_ms(); uint64_t now = start; pthread_mutex_lock(&ev->mu); for (;;) { if (ev->state) break; uint64_t remain = timeout - (now - start); struct timespec ts; ts.tv_sec = remain / 1000; ts.tv_nsec = (remain % 1000) * 1000 * 1000; pthread_cond_timedwait(&ev->cv, &ev->mu, &ts); now = current_time_ms(); if (now - start > timeout) break; } int res = ev->state; pthread_mutex_unlock(&ev->mu); return res; } #define BITMASK(bf_off,bf_len) (((1ull << (bf_len)) - 1) << (bf_off)) #define STORE_BY_BITMASK(type,htobe,addr,val,bf_off,bf_len) *(type*)(addr) = htobe((htobe(*(type*)(addr)) & ~BITMASK((bf_off), (bf_len))) | (((type)(val) << (bf_off)) & BITMASK((bf_off), (bf_len)))) static long syz_mmap(volatile long a0, volatile long a1) { return (long)mmap((void*)a0, a1, PROT_READ | PROT_WRITE, MAP_ANON | MAP_PRIVATE | MAP_FIXED, -1, 0); } static long syz_errno(volatile long v) { errno = v; return v == 0 ? 0 : -1; } static long syz_exit(volatile long status) { _exit(status); return 0; } static long syz_sleep_ms(volatile long ms) { sleep_ms(ms); return 0; } static long syz_compare(volatile long want, volatile long want_len, volatile long got, volatile long got_len) { if (want_len != got_len) { errno = EBADF; goto error; } if (memcmp((void*)want, (void*)got, want_len)) { errno = EINVAL; goto error; } return 0; error: return -1; } static long syz_compare_int(volatile long n, ...) { va_list args; va_start(args, n); long v0 = va_arg(args, long); long v1 = va_arg(args, long); long v2 = va_arg(args, long); long v3 = va_arg(args, long); va_end(args); if (n < 2 || n > 4) return errno = E2BIG, -1; if (n <= 2 && v2 != 0) return errno = EFAULT, -1; if (n <= 3 && v3 != 0) return errno = EFAULT, -1; if (v0 != v1) return errno = EINVAL, -1; if (n > 2 && v0 != v2) return errno = EINVAL, -1; if (n > 3 && v0 != v3) return errno = EINVAL, -1; return 0; } static void loop(); static int do_sandbox_none(void) { loop(); return 0; } static void fake_crash(const char* name) { exit(1); exit(1); } static long syz_test_fuzzer1(volatile long a, volatile long b, volatile long c) { if (a == 1 && b == 1 && c == 1) fake_crash("first bug"); if (a == 1 && b == 2 && c == 3) fake_crash("second bug"); return 0; } static long syz_execute_func(volatile long text) { ((void (*)(void))(text))(); return 0; } struct thread_t { int created, call; event_t ready, done; }; static struct thread_t threads[16]; static void execute_call(int call); static int running; static void* thr(void* arg) { struct thread_t* th = (struct thread_t*)arg; for (;;) { event_wait(&th->ready); event_reset(&th->ready); execute_call(th->call); __atomic_fetch_sub(&running, 1, __ATOMIC_RELAXED); event_set(&th->done); } return 0; } static void execute_one(void) { if (write(1, "executing program\n", sizeof("executing program\n") - 1)) { } int i, call, thread; for (call = 0; call < 18; call++) { for (thread = 0; thread < (int)(sizeof(threads) / sizeof(threads[0])); thread++) { struct thread_t* th = &threads[thread]; if (!th->created) { th->created = 1; event_init(&th->ready); event_init(&th->done); event_set(&th->done); thread_start(thr, th); } if (!event_isset(&th->done)) continue; event_reset(&th->done); th->call = call; __atomic_fetch_add(&running, 1, __ATOMIC_RELAXED); event_set(&th->ready); if (call == 1) break; event_timedwait(&th->done, 50); break; } } for (i = 0; i < 100 && __atomic_load_n(&running, __ATOMIC_RELAXED); i++) sleep_ms(1); } static void execute_one(void); static void loop(void) { execute_one(); } void execute_call(int call) { switch (call) { case 0: *(uint64_t*)0x20000000 = 0x20ffb000; *(uint64_t*)0x20000008 = 0x2000; inject_fault(1); syscall(SYS_test, /*a0=*/0x20000000ul, 0, 0, 0, 0, 0); break; case 1: syz_mmap(/*addr=*/0x20ffc000, /*len=*/0x1000); break; case 2: syscall(SYS_test, /*v0=*/0x20ffc000ul, /*l0=*/0, /*v1=*/0x20ff8000ul, /*l1=*/0x5000, /*v2=*/0x20ff4000ul, /*l2=*/0x9000ul); { int i; for(i = 0; i < 4; i++) { syscall(SYS_test, /*v0=*/0x20ffc000ul, /*l0=*/0, /*v1=*/0x20ff8000ul, /*l1=*/0x5000, /*v2=*/0x20ff4000ul, /*l2=*/0x9000ul); } } break; case 3: syscall(SYS_test, /*v0=*/0x20ff8000ul, /*l0=*/0, /*v1=*/0x20ffa000ul, /*l1=*/0x5000, /*v2=*/0x20ff8000ul, /*l2=*/0x8000ul); break; case 4: *(uint16_t*)0x20000040 = 0; *(uint16_t*)0x20000042 = 2; syscall(SYS_test, /*a0=*/0x20000040ul, 0, 0, 0, 0, 0); break; case 5: syscall(SYS_test, /*a0=*/0x20ff4000ul, /*a1=*/0, /*a2=*/0x4000, /*a3=*/0x2000, /*a4=*/0x1000ul, 0); break; case 6: syscall(SYS_test, /*a0=*/0x20ffd000ul, /*a1=*/0, /*a2=*/0x3000, /*a3=*/0x1800, /*a4=*/0xc00ul, 0); break; case 7: syscall(SYS_test, /*a0=*/0ul, 0, 0, 0, 0, 0); break; case 8: memcpy((void*)0x20000080, "bar\000", 4); syscall(SYS_test, /*a=*/0x20000080ul, 0, 0, 0, 0, 0); break; case 9: syscall(SYS_test, /*a0=*/0x20ff7000ul, 0, 0, 0, 0, 0); break; case 10: memcpy((void*)0x20000000, "!/\000", 3); *(uint8_t*)0x20000040 = 0x5c; *(uint8_t*)0x20000044 = 2; STORE_BY_BITMASK(uint32_t, , 0x20000044, 4, 8, 12); STORE_BY_BITMASK(uint16_t, , 0x20000046, 4, 4, 4); syz_compare(/*want=*/0x20000000, /*want_len=*/3, /*got=*/0x20000040, /*got_len=*/8); break; case 11: syz_compare_int(/*n=*/2, /*v0=*/6, /*v1=*/8, 0, 0); break; case 12: syz_errno(/*v=*/6); break; case 13: memcpy((void*)0x20000080, "\x88\x2b\x1f\x02\x1c\x62\x70\x6e\xb4\x6a\x65\xc1\x56\x99\xe5\x20\x05\x6b\x4a\xcb\x14\xfe\x31\x74\xd5\xf8\xc9\x0a\xfa\x89\x3c\xc1\xd9\xeb\x62\x9e\x40\x81\xf2\xcb\x6a\x2c\x8f\x4c\x8f\x06\x68\xfd\xbe\xac", 50); syz_execute_func(/*text=*/0x20000080); break; case 14: syz_exit(/*status=*/4); break; case 15: syz_mmap(/*addr=*/0x20ffa000, /*len=*/0x3000); break; case 16: syz_sleep_ms(/*ms=*/0x1f); break; case 17: syz_test_fuzzer1(/*a=*/4, /*b=*/8, /*c=*/0); break; } } int main(void) { syz_mmap(/*addr=*/0x20000000, /*len=*/0x1000000); setup_fault(); use_temporary_dir(); do_sandbox_none(); 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-executor1301046805 -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 (1.26s) 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$length9(&(0x7f0000000000)={&(0x7f0000ffb000/0x2000)=nil, 0x2000}) (fail_nth: 1) syz_mmap(&(0x7f0000ffc000/0x1000)=nil, 0x1000) (async) test$vma0(&(0x7f0000ffc000/0x1000)=nil, 0x1000, &(0x7f0000ff8000/0x5000)=nil, 0x5000, &(0x7f0000ff4000/0x9000)=nil, 0x9000) (rerun: 4) test$vma0(&(0x7f0000ff8000/0x2000)=nil, 0x2000, &(0x7f0000ffa000/0x5000)=nil, 0x5000, &(0x7f0000ff8000/0x8000)=nil, 0x8000) test$length0(&(0x7f0000000040)={0x0, 0x2}) test$length10(&(0x7f0000ff4000/0x4000)=nil, 0x4000, 0x4000, 0x2000, 0x1000) test$length10(&(0x7f0000ffd000/0x3000)=nil, 0x3000, 0x3000, 0x1800, 0xc00) test$opt2(0x0) test$str2(&(0x7f0000000080)='bar\x00') test$opt2(&(0x7f0000ff7000/0x2000)=nil) syz_compare(&(0x7f0000000000)='!/\x00', 0x3, &(0x7f0000000040)=@bf15={0x5c, {0x2, 0x4, 0x4}}, 0x8) syz_compare_int$2(0x2, 0x6, 0x8) syz_errno(0x6) syz_execute_func(&(0x7f0000000080)="882b1f021c62706eb46a65c15699e520056b4acb14fe3174d5f8c90afa893cc1d9eb629e4081f2cb6a2c8f4c8f0668fdbeac") syz_exit(0x4) syz_mmap(&(0x7f0000ffa000/0x3000)=nil, 0x3000) syz_sleep_ms(0x1f) syz_test_fuzzer1(0x4, 0x8, 0x0) csource_test.go:151: failed to build program: // autogenerated by syzkaller (https://github.com/google/syzkaller) #define _GNU_SOURCE #include #include #include #include #include #include #include #include #include #include #include #include #ifndef SYS_test #define SYS_test 0 #endif static void sleep_ms(uint64_t ms) { usleep(ms * 1000); } static uint64_t current_time_ms(void) { struct timespec ts; if (clock_gettime(CLOCK_MONOTONIC, &ts)) exit(1); return (uint64_t)ts.tv_sec * 1000 + (uint64_t)ts.tv_nsec / 1000000; } static void use_temporary_dir(void) { char tmpdir_template[] = "./syzkaller.XXXXXX"; char* tmpdir = mkdtemp(tmpdir_template); if (!tmpdir) exit(1); if (chmod(tmpdir, 0777)) exit(1); if (chdir(tmpdir)) exit(1); } static int inject_fault(int nth) { return 0; } static void setup_fault() { } static void thread_start(void* (*fn)(void*), void* arg) { pthread_t th; pthread_attr_t attr; pthread_attr_init(&attr); pthread_attr_setstacksize(&attr, 128 << 10); int i = 0; for (; i < 100; i++) { if (pthread_create(&th, &attr, fn, arg) == 0) { pthread_attr_destroy(&attr); return; } if (errno == EAGAIN) { usleep(50); continue; } break; } exit(1); } typedef struct { pthread_mutex_t mu; pthread_cond_t cv; int state; } event_t; static void event_init(event_t* ev) { if (pthread_mutex_init(&ev->mu, 0)) exit(1); if (pthread_cond_init(&ev->cv, 0)) exit(1); ev->state = 0; } static void event_reset(event_t* ev) { ev->state = 0; } static void event_set(event_t* ev) { pthread_mutex_lock(&ev->mu); if (ev->state) exit(1); ev->state = 1; pthread_mutex_unlock(&ev->mu); pthread_cond_broadcast(&ev->cv); } static void event_wait(event_t* ev) { pthread_mutex_lock(&ev->mu); while (!ev->state) pthread_cond_wait(&ev->cv, &ev->mu); pthread_mutex_unlock(&ev->mu); } static int event_isset(event_t* ev) { pthread_mutex_lock(&ev->mu); int res = ev->state; pthread_mutex_unlock(&ev->mu); return res; } static int event_timedwait(event_t* ev, uint64_t timeout) { uint64_t start = current_time_ms(); uint64_t now = start; pthread_mutex_lock(&ev->mu); for (;;) { if (ev->state) break; uint64_t remain = timeout - (now - start); struct timespec ts; ts.tv_sec = remain / 1000; ts.tv_nsec = (remain % 1000) * 1000 * 1000; pthread_cond_timedwait(&ev->cv, &ev->mu, &ts); now = current_time_ms(); if (now - start > timeout) break; } int res = ev->state; pthread_mutex_unlock(&ev->mu); return res; } #define BITMASK(bf_off,bf_len) (((1ull << (bf_len)) - 1) << (bf_off)) #define STORE_BY_BITMASK(type,htobe,addr,val,bf_off,bf_len) *(type*)(addr) = htobe((htobe(*(type*)(addr)) & ~BITMASK((bf_off), (bf_len))) | (((type)(val) << (bf_off)) & BITMASK((bf_off), (bf_len)))) static long syz_mmap(volatile long a0, volatile long a1) { return (long)mmap((void*)a0, a1, PROT_READ | PROT_WRITE, MAP_ANON | MAP_PRIVATE | MAP_FIXED, -1, 0); } static long syz_errno(volatile long v) { errno = v; return v == 0 ? 0 : -1; } static long syz_exit(volatile long status) { _exit(status); return 0; } static long syz_sleep_ms(volatile long ms) { sleep_ms(ms); return 0; } static long syz_compare(volatile long want, volatile long want_len, volatile long got, volatile long got_len) { if (want_len != got_len) { errno = EBADF; goto error; } if (memcmp((void*)want, (void*)got, want_len)) { errno = EINVAL; goto error; } return 0; error: return -1; } static long syz_compare_int(volatile long n, ...) { va_list args; va_start(args, n); long v0 = va_arg(args, long); long v1 = va_arg(args, long); long v2 = va_arg(args, long); long v3 = va_arg(args, long); va_end(args); if (n < 2 || n > 4) return errno = E2BIG, -1; if (n <= 2 && v2 != 0) return errno = EFAULT, -1; if (n <= 3 && v3 != 0) return errno = EFAULT, -1; if (v0 != v1) return errno = EINVAL, -1; if (n > 2 && v0 != v2) return errno = EINVAL, -1; if (n > 3 && v0 != v3) return errno = EINVAL, -1; return 0; } static void loop(); static int do_sandbox_none(void) { loop(); return 0; } static void fake_crash(const char* name) { exit(1); exit(1); } static long syz_test_fuzzer1(volatile long a, volatile long b, volatile long c) { if (a == 1 && b == 1 && c == 1) fake_crash("first bug"); if (a == 1 && b == 2 && c == 3) fake_crash("second bug"); return 0; } static long syz_execute_func(volatile long text) { ((void (*)(void))(text))(); return 0; } struct thread_t { int created, call; event_t ready, done; }; static struct thread_t threads[16]; static void execute_call(int call); static int running; static void* thr(void* arg) { struct thread_t* th = (struct thread_t*)arg; for (;;) { event_wait(&th->ready); event_reset(&th->ready); execute_call(th->call); __atomic_fetch_sub(&running, 1, __ATOMIC_RELAXED); event_set(&th->done); } return 0; } static void execute_one(void) { int i, call, thread; for (call = 0; call < 18; call++) { for (thread = 0; thread < (int)(sizeof(threads) / sizeof(threads[0])); thread++) { struct thread_t* th = &threads[thread]; if (!th->created) { th->created = 1; event_init(&th->ready); event_init(&th->done); event_set(&th->done); thread_start(thr, th); } if (!event_isset(&th->done)) continue; event_reset(&th->done); th->call = call; __atomic_fetch_add(&running, 1, __ATOMIC_RELAXED); event_set(&th->ready); if (call == 1) break; event_timedwait(&th->done, 50); break; } } for (i = 0; i < 100 && __atomic_load_n(&running, __ATOMIC_RELAXED); i++) sleep_ms(1); } static void execute_one(void); static void loop(void) { execute_one(); } void execute_call(int call) { switch (call) { case 0: *(uint64_t*)0x20000000 = 0x20ffb000; *(uint64_t*)0x20000008 = 0x2000; inject_fault(1); syscall(SYS_test, /*a0=*/0x20000000ul, 0, 0, 0, 0, 0); break; case 1: syz_mmap(/*addr=*/0x20ffc000, /*len=*/0x1000); break; case 2: syscall(SYS_test, /*v0=*/0x20ffc000ul, /*l0=*/0, /*v1=*/0x20ff8000ul, /*l1=*/0x5000, /*v2=*/0x20ff4000ul, /*l2=*/0x9000ul); { int i; for(i = 0; i < 4; i++) { syscall(SYS_test, /*v0=*/0x20ffc000ul, /*l0=*/0, /*v1=*/0x20ff8000ul, /*l1=*/0x5000, /*v2=*/0x20ff4000ul, /*l2=*/0x9000ul); } } break; case 3: syscall(SYS_test, /*v0=*/0x20ff8000ul, /*l0=*/0, /*v1=*/0x20ffa000ul, /*l1=*/0x5000, /*v2=*/0x20ff8000ul, /*l2=*/0x8000ul); break; case 4: *(uint16_t*)0x20000040 = 0; *(uint16_t*)0x20000042 = 2; syscall(SYS_test, /*a0=*/0x20000040ul, 0, 0, 0, 0, 0); break; case 5: syscall(SYS_test, /*a0=*/0x20ff4000ul, /*a1=*/0, /*a2=*/0x4000, /*a3=*/0x2000, /*a4=*/0x1000ul, 0); break; case 6: syscall(SYS_test, /*a0=*/0x20ffd000ul, /*a1=*/0, /*a2=*/0x3000, /*a3=*/0x1800, /*a4=*/0xc00ul, 0); break; case 7: syscall(SYS_test, /*a0=*/0ul, 0, 0, 0, 0, 0); break; case 8: memcpy((void*)0x20000080, "bar\000", 4); syscall(SYS_test, /*a=*/0x20000080ul, 0, 0, 0, 0, 0); break; case 9: syscall(SYS_test, /*a0=*/0x20ff7000ul, 0, 0, 0, 0, 0); break; case 10: memcpy((void*)0x20000000, "!/\000", 3); *(uint8_t*)0x20000040 = 0x5c; *(uint8_t*)0x20000044 = 2; STORE_BY_BITMASK(uint32_t, , 0x20000044, 4, 8, 12); STORE_BY_BITMASK(uint16_t, , 0x20000046, 4, 4, 4); syz_compare(/*want=*/0x20000000, /*want_len=*/3, /*got=*/0x20000040, /*got_len=*/8); break; case 11: syz_compare_int(/*n=*/2, /*v0=*/6, /*v1=*/8, 0, 0); break; case 12: syz_errno(/*v=*/6); break; case 13: memcpy((void*)0x20000080, "\x88\x2b\x1f\x02\x1c\x62\x70\x6e\xb4\x6a\x65\xc1\x56\x99\xe5\x20\x05\x6b\x4a\xcb\x14\xfe\x31\x74\xd5\xf8\xc9\x0a\xfa\x89\x3c\xc1\xd9\xeb\x62\x9e\x40\x81\xf2\xcb\x6a\x2c\x8f\x4c\x8f\x06\x68\xfd\xbe\xac", 50); syz_execute_func(/*text=*/0x20000080); break; case 14: syz_exit(/*status=*/4); break; case 15: syz_mmap(/*addr=*/0x20ffa000, /*len=*/0x3000); break; case 16: syz_sleep_ms(/*ms=*/0x1f); break; case 17: syz_test_fuzzer1(/*a=*/4, /*b=*/8, /*c=*/0); break; } } int main(void) { syz_mmap(/*addr=*/0x20000000, /*len=*/0x1000000); setup_fault(); use_temporary_dir(); do_sandbox_none(); return 0; } :303:3: 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-executor184740542 -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 (0.96s) csource_test.go:150: opts: {Threaded:true Repeat:false RepeatTimes:0 Procs:0 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:false NetDevices:false NetReset:false Cgroups:false BinfmtMisc:false CloseFDs:false KCSAN:false DevlinkPCI:false NicVF:false USB:false VhciInjection:false Wifi:false IEEE802154:false Sysctl:false Swap:false UseTmpDir:true HandleSegv:false Repro:false Trace:false LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}} program: test$length9(&(0x7f0000000000)={&(0x7f0000ffb000/0x2000)=nil, 0x2000}) (fail_nth: 1) syz_mmap(&(0x7f0000ffc000/0x1000)=nil, 0x1000) (async) test$vma0(&(0x7f0000ffc000/0x1000)=nil, 0x1000, &(0x7f0000ff8000/0x5000)=nil, 0x5000, &(0x7f0000ff4000/0x9000)=nil, 0x9000) (rerun: 4) test$vma0(&(0x7f0000ff8000/0x2000)=nil, 0x2000, &(0x7f0000ffa000/0x5000)=nil, 0x5000, &(0x7f0000ff8000/0x8000)=nil, 0x8000) test$length0(&(0x7f0000000040)={0x0, 0x2}) test$length10(&(0x7f0000ff4000/0x4000)=nil, 0x4000, 0x4000, 0x2000, 0x1000) test$length10(&(0x7f0000ffd000/0x3000)=nil, 0x3000, 0x3000, 0x1800, 0xc00) test$opt2(0x0) test$str2(&(0x7f0000000080)='bar\x00') test$opt2(&(0x7f0000ff7000/0x2000)=nil) syz_compare(&(0x7f0000000000)='!/\x00', 0x3, &(0x7f0000000040)=@bf15={0x5c, {0x2, 0x4, 0x4}}, 0x8) syz_compare_int$2(0x2, 0x6, 0x8) syz_errno(0x6) syz_execute_func(&(0x7f0000000080)="882b1f021c62706eb46a65c15699e520056b4acb14fe3174d5f8c90afa893cc1d9eb629e4081f2cb6a2c8f4c8f0668fdbeac") syz_exit(0x4) syz_mmap(&(0x7f0000ffa000/0x3000)=nil, 0x3000) syz_sleep_ms(0x1f) syz_test_fuzzer1(0x4, 0x8, 0x0) csource_test.go:151: failed to build program: // autogenerated by syzkaller (https://github.com/google/syzkaller) #define _GNU_SOURCE #include #include #include #include #include #include #include #include #include #include #include #include #ifndef SYS_test #define SYS_test 0 #endif static void sleep_ms(uint64_t ms) { usleep(ms * 1000); } static uint64_t current_time_ms(void) { struct timespec ts; if (clock_gettime(CLOCK_MONOTONIC, &ts)) exit(1); return (uint64_t)ts.tv_sec * 1000 + (uint64_t)ts.tv_nsec / 1000000; } static void use_temporary_dir(void) { char tmpdir_template[] = "./syzkaller.XXXXXX"; char* tmpdir = mkdtemp(tmpdir_template); if (!tmpdir) exit(1); if (chmod(tmpdir, 0777)) exit(1); if (chdir(tmpdir)) exit(1); } static int inject_fault(int nth) { return 0; } static void setup_fault() { } static void thread_start(void* (*fn)(void*), void* arg) { pthread_t th; pthread_attr_t attr; pthread_attr_init(&attr); pthread_attr_setstacksize(&attr, 128 << 10); int i = 0; for (; i < 100; i++) { if (pthread_create(&th, &attr, fn, arg) == 0) { pthread_attr_destroy(&attr); return; } if (errno == EAGAIN) { usleep(50); continue; } break; } exit(1); } typedef struct { pthread_mutex_t mu; pthread_cond_t cv; int state; } event_t; static void event_init(event_t* ev) { if (pthread_mutex_init(&ev->mu, 0)) exit(1); if (pthread_cond_init(&ev->cv, 0)) exit(1); ev->state = 0; } static void event_reset(event_t* ev) { ev->state = 0; } static void event_set(event_t* ev) { pthread_mutex_lock(&ev->mu); if (ev->state) exit(1); ev->state = 1; pthread_mutex_unlock(&ev->mu); pthread_cond_broadcast(&ev->cv); } static void event_wait(event_t* ev) { pthread_mutex_lock(&ev->mu); while (!ev->state) pthread_cond_wait(&ev->cv, &ev->mu); pthread_mutex_unlock(&ev->mu); } static int event_isset(event_t* ev) { pthread_mutex_lock(&ev->mu); int res = ev->state; pthread_mutex_unlock(&ev->mu); return res; } static int event_timedwait(event_t* ev, uint64_t timeout) { uint64_t start = current_time_ms(); uint64_t now = start; pthread_mutex_lock(&ev->mu); for (;;) { if (ev->state) break; uint64_t remain = timeout - (now - start); struct timespec ts; ts.tv_sec = remain / 1000; ts.tv_nsec = (remain % 1000) * 1000 * 1000; pthread_cond_timedwait(&ev->cv, &ev->mu, &ts); now = current_time_ms(); if (now - start > timeout) break; } int res = ev->state; pthread_mutex_unlock(&ev->mu); return res; } #define BITMASK(bf_off,bf_len) (((1ull << (bf_len)) - 1) << (bf_off)) #define STORE_BY_BITMASK(type,htobe,addr,val,bf_off,bf_len) *(type*)(addr) = htobe((htobe(*(type*)(addr)) & ~BITMASK((bf_off), (bf_len))) | (((type)(val) << (bf_off)) & BITMASK((bf_off), (bf_len)))) static long syz_mmap(volatile long a0, volatile long a1) { return (long)mmap((void*)a0, a1, PROT_READ | PROT_WRITE, MAP_ANON | MAP_PRIVATE | MAP_FIXED, -1, 0); } static long syz_errno(volatile long v) { errno = v; return v == 0 ? 0 : -1; } static long syz_exit(volatile long status) { _exit(status); return 0; } static long syz_sleep_ms(volatile long ms) { sleep_ms(ms); return 0; } static long syz_compare(volatile long want, volatile long want_len, volatile long got, volatile long got_len) { if (want_len != got_len) { errno = EBADF; goto error; } if (memcmp((void*)want, (void*)got, want_len)) { errno = EINVAL; goto error; } return 0; error: return -1; } static long syz_compare_int(volatile long n, ...) { va_list args; va_start(args, n); long v0 = va_arg(args, long); long v1 = va_arg(args, long); long v2 = va_arg(args, long); long v3 = va_arg(args, long); va_end(args); if (n < 2 || n > 4) return errno = E2BIG, -1; if (n <= 2 && v2 != 0) return errno = EFAULT, -1; if (n <= 3 && v3 != 0) return errno = EFAULT, -1; if (v0 != v1) return errno = EINVAL, -1; if (n > 2 && v0 != v2) return errno = EINVAL, -1; if (n > 3 && v0 != v3) return errno = EINVAL, -1; return 0; } static void loop(); static int do_sandbox_none(void) { loop(); return 0; } static void fake_crash(const char* name) { exit(1); exit(1); } static long syz_test_fuzzer1(volatile long a, volatile long b, volatile long c) { if (a == 1 && b == 1 && c == 1) fake_crash("first bug"); if (a == 1 && b == 2 && c == 3) fake_crash("second bug"); return 0; } static long syz_execute_func(volatile long text) { ((void (*)(void))(text))(); return 0; } struct thread_t { int created, call; event_t ready, done; }; static struct thread_t threads[16]; static void execute_call(int call); static int running; static void* thr(void* arg) { struct thread_t* th = (struct thread_t*)arg; for (;;) { event_wait(&th->ready); event_reset(&th->ready); execute_call(th->call); __atomic_fetch_sub(&running, 1, __ATOMIC_RELAXED); event_set(&th->done); } return 0; } static void loop(void) { int i, call, thread; for (call = 0; call < 18; call++) { for (thread = 0; thread < (int)(sizeof(threads) / sizeof(threads[0])); thread++) { struct thread_t* th = &threads[thread]; if (!th->created) { th->created = 1; event_init(&th->ready); event_init(&th->done); event_set(&th->done); thread_start(thr, th); } if (!event_isset(&th->done)) continue; event_reset(&th->done); th->call = call; __atomic_fetch_add(&running, 1, __ATOMIC_RELAXED); event_set(&th->ready); if (call == 1) break; event_timedwait(&th->done, 50); break; } } for (i = 0; i < 100 && __atomic_load_n(&running, __ATOMIC_RELAXED); i++) sleep_ms(1); } void execute_call(int call) { switch (call) { case 0: *(uint64_t*)0x20000000 = 0x20ffb000; *(uint64_t*)0x20000008 = 0x2000; inject_fault(1); syscall(SYS_test, /*a0=*/0x20000000ul, 0, 0, 0, 0, 0); break; case 1: syz_mmap(/*addr=*/0x20ffc000, /*len=*/0x1000); break; case 2: syscall(SYS_test, /*v0=*/0x20ffc000ul, /*l0=*/0, /*v1=*/0x20ff8000ul, /*l1=*/0x5000, /*v2=*/0x20ff4000ul, /*l2=*/0x9000ul); { int i; for(i = 0; i < 4; i++) { syscall(SYS_test, /*v0=*/0x20ffc000ul, /*l0=*/0, /*v1=*/0x20ff8000ul, /*l1=*/0x5000, /*v2=*/0x20ff4000ul, /*l2=*/0x9000ul); } } break; case 3: syscall(SYS_test, /*v0=*/0x20ff8000ul, /*l0=*/0, /*v1=*/0x20ffa000ul, /*l1=*/0x5000, /*v2=*/0x20ff8000ul, /*l2=*/0x8000ul); break; case 4: *(uint16_t*)0x20000040 = 0; *(uint16_t*)0x20000042 = 2; syscall(SYS_test, /*a0=*/0x20000040ul, 0, 0, 0, 0, 0); break; case 5: syscall(SYS_test, /*a0=*/0x20ff4000ul, /*a1=*/0, /*a2=*/0x4000, /*a3=*/0x2000, /*a4=*/0x1000ul, 0); break; case 6: syscall(SYS_test, /*a0=*/0x20ffd000ul, /*a1=*/0, /*a2=*/0x3000, /*a3=*/0x1800, /*a4=*/0xc00ul, 0); break; case 7: syscall(SYS_test, /*a0=*/0ul, 0, 0, 0, 0, 0); break; case 8: memcpy((void*)0x20000080, "bar\000", 4); syscall(SYS_test, /*a=*/0x20000080ul, 0, 0, 0, 0, 0); break; case 9: syscall(SYS_test, /*a0=*/0x20ff7000ul, 0, 0, 0, 0, 0); break; case 10: memcpy((void*)0x20000000, "!/\000", 3); *(uint8_t*)0x20000040 = 0x5c; *(uint8_t*)0x20000044 = 2; STORE_BY_BITMASK(uint32_t, , 0x20000044, 4, 8, 12); STORE_BY_BITMASK(uint16_t, , 0x20000046, 4, 4, 4); syz_compare(/*want=*/0x20000000, /*want_len=*/3, /*got=*/0x20000040, /*got_len=*/8); break; case 11: syz_compare_int(/*n=*/2, /*v0=*/6, /*v1=*/8, 0, 0); break; case 12: syz_errno(/*v=*/6); break; case 13: memcpy((void*)0x20000080, "\x88\x2b\x1f\x02\x1c\x62\x70\x6e\xb4\x6a\x65\xc1\x56\x99\xe5\x20\x05\x6b\x4a\xcb\x14\xfe\x31\x74\xd5\xf8\xc9\x0a\xfa\x89\x3c\xc1\xd9\xeb\x62\x9e\x40\x81\xf2\xcb\x6a\x2c\x8f\x4c\x8f\x06\x68\xfd\xbe\xac", 50); syz_execute_func(/*text=*/0x20000080); break; case 14: syz_exit(/*status=*/4); break; case 15: syz_mmap(/*addr=*/0x20ffa000, /*len=*/0x3000); break; case 16: syz_sleep_ms(/*ms=*/0x1f); break; case 17: syz_test_fuzzer1(/*a=*/4, /*b=*/8, /*c=*/0); break; } } int main(void) { syz_mmap(/*addr=*/0x20000000, /*len=*/0x1000000); setup_fault(); use_temporary_dir(); do_sandbox_none(); return 0; } :297:3: 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-executor358747322 -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/64/5 (1.40s) csource_test.go:150: opts: {Threaded:true Repeat:true RepeatTimes:0 Procs:4 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:false NetDevices:false NetReset:false Cgroups:false BinfmtMisc:false CloseFDs:false KCSAN:false DevlinkPCI:false NicVF:false USB:false VhciInjection:false Wifi:false IEEE802154:false Sysctl:false Swap:false UseTmpDir:true HandleSegv:false Repro:false Trace:false LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}} program: test$length9(&(0x7f0000000000)={&(0x7f0000ffb000/0x2000)=nil, 0x2000}) (fail_nth: 1) syz_mmap(&(0x7f0000ffc000/0x1000)=nil, 0x1000) (async) test$vma0(&(0x7f0000ffc000/0x1000)=nil, 0x1000, &(0x7f0000ff8000/0x5000)=nil, 0x5000, &(0x7f0000ff4000/0x9000)=nil, 0x9000) (rerun: 4) test$vma0(&(0x7f0000ff8000/0x2000)=nil, 0x2000, &(0x7f0000ffa000/0x5000)=nil, 0x5000, &(0x7f0000ff8000/0x8000)=nil, 0x8000) test$length0(&(0x7f0000000040)={0x0, 0x2}) test$length10(&(0x7f0000ff4000/0x4000)=nil, 0x4000, 0x4000, 0x2000, 0x1000) test$length10(&(0x7f0000ffd000/0x3000)=nil, 0x3000, 0x3000, 0x1800, 0xc00) test$opt2(0x0) test$str2(&(0x7f0000000080)='bar\x00') test$opt2(&(0x7f0000ff7000/0x2000)=nil) syz_compare(&(0x7f0000000000)='!/\x00', 0x3, &(0x7f0000000040)=@bf15={0x5c, {0x2, 0x4, 0x4}}, 0x8) syz_compare_int$2(0x2, 0x6, 0x8) syz_errno(0x6) syz_execute_func(&(0x7f0000000080)="882b1f021c62706eb46a65c15699e520056b4acb14fe3174d5f8c90afa893cc1d9eb629e4081f2cb6a2c8f4c8f0668fdbeac") syz_exit(0x4) syz_mmap(&(0x7f0000ffa000/0x3000)=nil, 0x3000) syz_sleep_ms(0x1f) syz_test_fuzzer1(0x4, 0x8, 0x0) csource_test.go:151: failed to build program: // autogenerated by syzkaller (https://github.com/google/syzkaller) #define _GNU_SOURCE #include #include #include #include #include #include #include #include #include #include #include #include #ifndef SYS_test #define SYS_test 0 #endif static unsigned long long procid; static void sleep_ms(uint64_t ms) { usleep(ms * 1000); } static uint64_t current_time_ms(void) { struct timespec ts; if (clock_gettime(CLOCK_MONOTONIC, &ts)) exit(1); return (uint64_t)ts.tv_sec * 1000 + (uint64_t)ts.tv_nsec / 1000000; } static void use_temporary_dir(void) { char tmpdir_template[] = "./syzkaller.XXXXXX"; char* tmpdir = mkdtemp(tmpdir_template); if (!tmpdir) exit(1); if (chmod(tmpdir, 0777)) exit(1); if (chdir(tmpdir)) exit(1); } static int inject_fault(int nth) { return 0; } static void setup_fault() { } static void thread_start(void* (*fn)(void*), void* arg) { pthread_t th; pthread_attr_t attr; pthread_attr_init(&attr); pthread_attr_setstacksize(&attr, 128 << 10); int i = 0; for (; i < 100; i++) { if (pthread_create(&th, &attr, fn, arg) == 0) { pthread_attr_destroy(&attr); return; } if (errno == EAGAIN) { usleep(50); continue; } break; } exit(1); } typedef struct { pthread_mutex_t mu; pthread_cond_t cv; int state; } event_t; static void event_init(event_t* ev) { if (pthread_mutex_init(&ev->mu, 0)) exit(1); if (pthread_cond_init(&ev->cv, 0)) exit(1); ev->state = 0; } static void event_reset(event_t* ev) { ev->state = 0; } static void event_set(event_t* ev) { pthread_mutex_lock(&ev->mu); if (ev->state) exit(1); ev->state = 1; pthread_mutex_unlock(&ev->mu); pthread_cond_broadcast(&ev->cv); } static void event_wait(event_t* ev) { pthread_mutex_lock(&ev->mu); while (!ev->state) pthread_cond_wait(&ev->cv, &ev->mu); pthread_mutex_unlock(&ev->mu); } static int event_isset(event_t* ev) { pthread_mutex_lock(&ev->mu); int res = ev->state; pthread_mutex_unlock(&ev->mu); return res; } static int event_timedwait(event_t* ev, uint64_t timeout) { uint64_t start = current_time_ms(); uint64_t now = start; pthread_mutex_lock(&ev->mu); for (;;) { if (ev->state) break; uint64_t remain = timeout - (now - start); struct timespec ts; ts.tv_sec = remain / 1000; ts.tv_nsec = (remain % 1000) * 1000 * 1000; pthread_cond_timedwait(&ev->cv, &ev->mu, &ts); now = current_time_ms(); if (now - start > timeout) break; } int res = ev->state; pthread_mutex_unlock(&ev->mu); return res; } #define BITMASK(bf_off,bf_len) (((1ull << (bf_len)) - 1) << (bf_off)) #define STORE_BY_BITMASK(type,htobe,addr,val,bf_off,bf_len) *(type*)(addr) = htobe((htobe(*(type*)(addr)) & ~BITMASK((bf_off), (bf_len))) | (((type)(val) << (bf_off)) & BITMASK((bf_off), (bf_len)))) static long syz_mmap(volatile long a0, volatile long a1) { return (long)mmap((void*)a0, a1, PROT_READ | PROT_WRITE, MAP_ANON | MAP_PRIVATE | MAP_FIXED, -1, 0); } static long syz_errno(volatile long v) { errno = v; return v == 0 ? 0 : -1; } static long syz_exit(volatile long status) { _exit(status); return 0; } static long syz_sleep_ms(volatile long ms) { sleep_ms(ms); return 0; } static long syz_compare(volatile long want, volatile long want_len, volatile long got, volatile long got_len) { if (want_len != got_len) { errno = EBADF; goto error; } if (memcmp((void*)want, (void*)got, want_len)) { errno = EINVAL; goto error; } return 0; error: return -1; } static long syz_compare_int(volatile long n, ...) { va_list args; va_start(args, n); long v0 = va_arg(args, long); long v1 = va_arg(args, long); long v2 = va_arg(args, long); long v3 = va_arg(args, long); va_end(args); if (n < 2 || n > 4) return errno = E2BIG, -1; if (n <= 2 && v2 != 0) return errno = EFAULT, -1; if (n <= 3 && v3 != 0) return errno = EFAULT, -1; if (v0 != v1) return errno = EINVAL, -1; if (n > 2 && v0 != v2) return errno = EINVAL, -1; if (n > 3 && v0 != v3) return errno = EINVAL, -1; return 0; } static void loop(); static int do_sandbox_none(void) { loop(); return 0; } static void fake_crash(const char* name) { exit(1); exit(1); } static long syz_test_fuzzer1(volatile long a, volatile long b, volatile long c) { if (a == 1 && b == 1 && c == 1) fake_crash("first bug"); if (a == 1 && b == 2 && c == 3) fake_crash("second bug"); return 0; } static long syz_execute_func(volatile long text) { ((void (*)(void))(text))(); return 0; } struct thread_t { int created, call; event_t ready, done; }; static struct thread_t threads[16]; static void execute_call(int call); static int running; static void* thr(void* arg) { struct thread_t* th = (struct thread_t*)arg; for (;;) { event_wait(&th->ready); event_reset(&th->ready); execute_call(th->call); __atomic_fetch_sub(&running, 1, __ATOMIC_RELAXED); event_set(&th->done); } return 0; } static void execute_one(void) { int i, call, thread; for (call = 0; call < 18; call++) { for (thread = 0; thread < (int)(sizeof(threads) / sizeof(threads[0])); thread++) { struct thread_t* th = &threads[thread]; if (!th->created) { th->created = 1; event_init(&th->ready); event_init(&th->done); event_set(&th->done); thread_start(thr, th); } if (!event_isset(&th->done)) continue; event_reset(&th->done); th->call = call; __atomic_fetch_add(&running, 1, __ATOMIC_RELAXED); event_set(&th->ready); if (call == 1) break; event_timedwait(&th->done, 50); break; } } for (i = 0; i < 100 && __atomic_load_n(&running, __ATOMIC_RELAXED); i++) sleep_ms(1); } static void execute_one(void); static void loop(void) { execute_one(); } void execute_call(int call) { switch (call) { case 0: *(uint64_t*)0x20000000 = 0x20ffb000; *(uint64_t*)0x20000008 = 0x2000; inject_fault(1); syscall(SYS_test, /*a0=*/0x20000000ul, 0, 0, 0, 0, 0); break; case 1: syz_mmap(/*addr=*/0x20ffc000, /*len=*/0x1000); break; case 2: syscall(SYS_test, /*v0=*/0x20ffc000ul, /*l0=*/0, /*v1=*/0x20ff8000ul, /*l1=*/0x5000, /*v2=*/0x20ff4000ul, /*l2=*/0x9000ul); { int i; for(i = 0; i < 4; i++) { syscall(SYS_test, /*v0=*/0x20ffc000ul, /*l0=*/0, /*v1=*/0x20ff8000ul, /*l1=*/0x5000, /*v2=*/0x20ff4000ul, /*l2=*/0x9000ul); } } break; case 3: syscall(SYS_test, /*v0=*/0x20ff8000ul, /*l0=*/0, /*v1=*/0x20ffa000ul, /*l1=*/0x5000, /*v2=*/0x20ff8000ul, /*l2=*/0x8000ul); break; case 4: *(uint16_t*)0x20000040 = 0; *(uint16_t*)0x20000042 = 2; syscall(SYS_test, /*a0=*/0x20000040ul, 0, 0, 0, 0, 0); break; case 5: syscall(SYS_test, /*a0=*/0x20ff4000ul, /*a1=*/0, /*a2=*/0x4000, /*a3=*/0x2000, /*a4=*/0x1000ul, 0); break; case 6: syscall(SYS_test, /*a0=*/0x20ffd000ul, /*a1=*/0, /*a2=*/0x3000, /*a3=*/0x1800, /*a4=*/0xc00ul, 0); break; case 7: syscall(SYS_test, /*a0=*/0ul, 0, 0, 0, 0, 0); break; case 8: memcpy((void*)0x20000080, "bar\000", 4); syscall(SYS_test, /*a=*/0x20000080ul, 0, 0, 0, 0, 0); break; case 9: syscall(SYS_test, /*a0=*/0x20ff7000ul, 0, 0, 0, 0, 0); break; case 10: memcpy((void*)0x20000000, "!/\000", 3); *(uint8_t*)0x20000040 = 0x5c; *(uint8_t*)0x20000044 = 2; STORE_BY_BITMASK(uint32_t, , 0x20000044, 4, 8, 12); STORE_BY_BITMASK(uint16_t, , 0x20000046, 4, 4, 4); syz_compare(/*want=*/0x20000000, /*want_len=*/3, /*got=*/0x20000040, /*got_len=*/8); break; case 11: syz_compare_int(/*n=*/2, /*v0=*/6, /*v1=*/8, 0, 0); break; case 12: syz_errno(/*v=*/6); break; case 13: memcpy((void*)0x20000080, "\x88\x2b\x1f\x02\x1c\x62\x70\x6e\xb4\x6a\x65\xc1\x56\x99\xe5\x20\x05\x6b\x4a\xcb\x14\xfe\x31\x74\xd5\xf8\xc9\x0a\xfa\x89\x3c\xc1\xd9\xeb\x62\x9e\x40\x81\xf2\xcb\x6a\x2c\x8f\x4c\x8f\x06\x68\xfd\xbe\xac", 50); syz_execute_func(/*text=*/0x20000080); break; case 14: syz_exit(/*status=*/4); break; case 15: syz_mmap(/*addr=*/0x20ffa000, /*len=*/0x3000); break; case 16: syz_sleep_ms(/*ms=*/0x1f); break; case 17: syz_test_fuzzer1(/*a=*/4, /*b=*/8, /*c=*/0); break; } } int main(void) { syz_mmap(/*addr=*/0x20000000, /*len=*/0x1000000); setup_fault(); for (procid = 0; procid < 4; procid++) { if (fork() == 0) { use_temporary_dir(); do_sandbox_none(); } } sleep(1000000); return 0; } :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-executor3928140928 -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 (1.60s) 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$length9(&(0x7f0000000000)={&(0x7f0000ffb000/0x2000)=nil, 0x2000}) (fail_nth: 1) syz_mmap(&(0x7f0000ffc000/0x1000)=nil, 0x1000) (async) test$vma0(&(0x7f0000ffc000/0x1000)=nil, 0x1000, &(0x7f0000ff8000/0x5000)=nil, 0x5000, &(0x7f0000ff4000/0x9000)=nil, 0x9000) (rerun: 4) test$vma0(&(0x7f0000ff8000/0x2000)=nil, 0x2000, &(0x7f0000ffa000/0x5000)=nil, 0x5000, &(0x7f0000ff8000/0x8000)=nil, 0x8000) test$length0(&(0x7f0000000040)={0x0, 0x2}) test$length10(&(0x7f0000ff4000/0x4000)=nil, 0x4000, 0x4000, 0x2000, 0x1000) test$length10(&(0x7f0000ffd000/0x3000)=nil, 0x3000, 0x3000, 0x1800, 0xc00) test$opt2(0x0) test$str2(&(0x7f0000000080)='bar\x00') test$opt2(&(0x7f0000ff7000/0x2000)=nil) syz_compare(&(0x7f0000000000)='!/\x00', 0x3, &(0x7f0000000040)=@bf15={0x5c, {0x2, 0x4, 0x4}}, 0x8) syz_compare_int$2(0x2, 0x6, 0x8) syz_errno(0x6) syz_execute_func(&(0x7f0000000080)="882b1f021c62706eb46a65c15699e520056b4acb14fe3174d5f8c90afa893cc1d9eb629e4081f2cb6a2c8f4c8f0668fdbeac") syz_exit(0x4) syz_mmap(&(0x7f0000ffa000/0x3000)=nil, 0x3000) syz_sleep_ms(0x1f) syz_test_fuzzer1(0x4, 0x8, 0x0) csource_test.go:151: failed to build program: // autogenerated by syzkaller (https://github.com/google/syzkaller) #define _GNU_SOURCE #include #include #include #include #include #include #include #include #include #include #include #include #ifndef SYS_test #define SYS_test 0 #endif static void sleep_ms(uint64_t ms) { usleep(ms * 1000); } static uint64_t current_time_ms(void) { struct timespec ts; if (clock_gettime(CLOCK_MONOTONIC, &ts)) exit(1); return (uint64_t)ts.tv_sec * 1000 + (uint64_t)ts.tv_nsec / 1000000; } static void use_temporary_dir(void) { char tmpdir_template[] = "./syzkaller.XXXXXX"; char* tmpdir = mkdtemp(tmpdir_template); if (!tmpdir) exit(1); if (chmod(tmpdir, 0777)) exit(1); if (chdir(tmpdir)) exit(1); } static int inject_fault(int nth) { return 0; } static void setup_fault() { } static void thread_start(void* (*fn)(void*), void* arg) { pthread_t th; pthread_attr_t attr; pthread_attr_init(&attr); pthread_attr_setstacksize(&attr, 128 << 10); int i = 0; for (; i < 100; i++) { if (pthread_create(&th, &attr, fn, arg) == 0) { pthread_attr_destroy(&attr); return; } if (errno == EAGAIN) { usleep(50); continue; } break; } exit(1); } typedef struct { pthread_mutex_t mu; pthread_cond_t cv; int state; } event_t; static void event_init(event_t* ev) { if (pthread_mutex_init(&ev->mu, 0)) exit(1); if (pthread_cond_init(&ev->cv, 0)) exit(1); ev->state = 0; } static void event_reset(event_t* ev) { ev->state = 0; } static void event_set(event_t* ev) { pthread_mutex_lock(&ev->mu); if (ev->state) exit(1); ev->state = 1; pthread_mutex_unlock(&ev->mu); pthread_cond_broadcast(&ev->cv); } static void event_wait(event_t* ev) { pthread_mutex_lock(&ev->mu); while (!ev->state) pthread_cond_wait(&ev->cv, &ev->mu); pthread_mutex_unlock(&ev->mu); } static int event_isset(event_t* ev) { pthread_mutex_lock(&ev->mu); int res = ev->state; pthread_mutex_unlock(&ev->mu); return res; } static int event_timedwait(event_t* ev, uint64_t timeout) { uint64_t start = current_time_ms(); uint64_t now = start; pthread_mutex_lock(&ev->mu); for (;;) { if (ev->state) break; uint64_t remain = timeout - (now - start); struct timespec ts; ts.tv_sec = remain / 1000; ts.tv_nsec = (remain % 1000) * 1000 * 1000; pthread_cond_timedwait(&ev->cv, &ev->mu, &ts); now = current_time_ms(); if (now - start > timeout) break; } int res = ev->state; pthread_mutex_unlock(&ev->mu); return res; } #define BITMASK(bf_off,bf_len) (((1ull << (bf_len)) - 1) << (bf_off)) #define STORE_BY_BITMASK(type,htobe,addr,val,bf_off,bf_len) *(type*)(addr) = htobe((htobe(*(type*)(addr)) & ~BITMASK((bf_off), (bf_len))) | (((type)(val) << (bf_off)) & BITMASK((bf_off), (bf_len)))) static long syz_mmap(volatile long a0, volatile long a1) { return (long)mmap((void*)a0, a1, PROT_READ | PROT_WRITE, MAP_ANON | MAP_PRIVATE | MAP_FIXED, -1, 0); } static long syz_errno(volatile long v) { errno = v; return v == 0 ? 0 : -1; } static long syz_exit(volatile long status) { _exit(status); return 0; } static long syz_sleep_ms(volatile long ms) { sleep_ms(ms); return 0; } static long syz_compare(volatile long want, volatile long want_len, volatile long got, volatile long got_len) { if (want_len != got_len) { errno = EBADF; goto error; } if (memcmp((void*)want, (void*)got, want_len)) { errno = EINVAL; goto error; } return 0; error: return -1; } static long syz_compare_int(volatile long n, ...) { va_list args; va_start(args, n); long v0 = va_arg(args, long); long v1 = va_arg(args, long); long v2 = va_arg(args, long); long v3 = va_arg(args, long); va_end(args); if (n < 2 || n > 4) return errno = E2BIG, -1; if (n <= 2 && v2 != 0) return errno = EFAULT, -1; if (n <= 3 && v3 != 0) return errno = EFAULT, -1; if (v0 != v1) return errno = EINVAL, -1; if (n > 2 && v0 != v2) return errno = EINVAL, -1; if (n > 3 && v0 != v3) return errno = EINVAL, -1; return 0; } static void loop(); static int do_sandbox_none(void) { loop(); return 0; } static void fake_crash(const char* name) { exit(1); exit(1); } static long syz_test_fuzzer1(volatile long a, volatile long b, volatile long c) { if (a == 1 && b == 1 && c == 1) fake_crash("first bug"); if (a == 1 && b == 2 && c == 3) fake_crash("second bug"); return 0; } static long syz_execute_func(volatile long text) { ((void (*)(void))(text))(); return 0; } struct thread_t { int created, call; event_t ready, done; }; static struct thread_t threads[16]; static void execute_call(int call); static int running; static void* thr(void* arg) { struct thread_t* th = (struct thread_t*)arg; for (;;) { event_wait(&th->ready); event_reset(&th->ready); execute_call(th->call); __atomic_fetch_sub(&running, 1, __ATOMIC_RELAXED); event_set(&th->done); } return 0; } static void execute_one(void) { int i, call, thread; for (call = 0; call < 18; call++) { for (thread = 0; thread < (int)(sizeof(threads) / sizeof(threads[0])); thread++) { struct thread_t* th = &threads[thread]; if (!th->created) { th->created = 1; event_init(&th->ready); event_init(&th->done); event_set(&th->done); thread_start(thr, th); } if (!event_isset(&th->done)) continue; event_reset(&th->done); th->call = call; __atomic_fetch_add(&running, 1, __ATOMIC_RELAXED); event_set(&th->ready); if (call == 1) break; event_timedwait(&th->done, 50); break; } } for (i = 0; i < 100 && __atomic_load_n(&running, __ATOMIC_RELAXED); i++) sleep_ms(1); } static void execute_one(void); static void loop(void) { execute_one(); } void execute_call(int call) { switch (call) { case 0: *(uint64_t*)0x20000000 = 0x20ffb000; *(uint64_t*)0x20000008 = 0x2000; inject_fault(1); syscall(SYS_test, /*a0=*/0x20000000ul, 0, 0, 0, 0, 0); break; case 1: syz_mmap(/*addr=*/0x20ffc000, /*len=*/0x1000); break; case 2: syscall(SYS_test, /*v0=*/0x20ffc000ul, /*l0=*/0, /*v1=*/0x20ff8000ul, /*l1=*/0x5000, /*v2=*/0x20ff4000ul, /*l2=*/0x9000ul); { int i; for(i = 0; i < 4; i++) { syscall(SYS_test, /*v0=*/0x20ffc000ul, /*l0=*/0, /*v1=*/0x20ff8000ul, /*l1=*/0x5000, /*v2=*/0x20ff4000ul, /*l2=*/0x9000ul); } } break; case 3: syscall(SYS_test, /*v0=*/0x20ff8000ul, /*l0=*/0, /*v1=*/0x20ffa000ul, /*l1=*/0x5000, /*v2=*/0x20ff8000ul, /*l2=*/0x8000ul); break; case 4: *(uint16_t*)0x20000040 = 0; *(uint16_t*)0x20000042 = 2; syscall(SYS_test, /*a0=*/0x20000040ul, 0, 0, 0, 0, 0); break; case 5: syscall(SYS_test, /*a0=*/0x20ff4000ul, /*a1=*/0, /*a2=*/0x4000, /*a3=*/0x2000, /*a4=*/0x1000ul, 0); break; case 6: syscall(SYS_test, /*a0=*/0x20ffd000ul, /*a1=*/0, /*a2=*/0x3000, /*a3=*/0x1800, /*a4=*/0xc00ul, 0); break; case 7: syscall(SYS_test, /*a0=*/0ul, 0, 0, 0, 0, 0); break; case 8: memcpy((void*)0x20000080, "bar\000", 4); syscall(SYS_test, /*a=*/0x20000080ul, 0, 0, 0, 0, 0); break; case 9: syscall(SYS_test, /*a0=*/0x20ff7000ul, 0, 0, 0, 0, 0); break; case 10: memcpy((void*)0x20000000, "!/\000", 3); *(uint8_t*)0x20000040 = 0x5c; *(uint8_t*)0x20000044 = 2; STORE_BY_BITMASK(uint32_t, , 0x20000044, 4, 8, 12); STORE_BY_BITMASK(uint16_t, , 0x20000046, 4, 4, 4); syz_compare(/*want=*/0x20000000, /*want_len=*/3, /*got=*/0x20000040, /*got_len=*/8); break; case 11: syz_compare_int(/*n=*/2, /*v0=*/6, /*v1=*/8, 0, 0); break; case 12: syz_errno(/*v=*/6); break; case 13: memcpy((void*)0x20000080, "\x88\x2b\x1f\x02\x1c\x62\x70\x6e\xb4\x6a\x65\xc1\x56\x99\xe5\x20\x05\x6b\x4a\xcb\x14\xfe\x31\x74\xd5\xf8\xc9\x0a\xfa\x89\x3c\xc1\xd9\xeb\x62\x9e\x40\x81\xf2\xcb\x6a\x2c\x8f\x4c\x8f\x06\x68\xfd\xbe\xac", 50); syz_execute_func(/*text=*/0x20000080); break; case 14: syz_exit(/*status=*/4); break; case 15: syz_mmap(/*addr=*/0x20ffa000, /*len=*/0x3000); break; case 16: syz_sleep_ms(/*ms=*/0x1f); break; case 17: syz_test_fuzzer1(/*a=*/4, /*b=*/8, /*c=*/0); break; } } int main(void) { syz_mmap(/*addr=*/0x20000000, /*len=*/0x1000000); setup_fault(); use_temporary_dir(); do_sandbox_none(); return 0; } :303:3: 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-executor507290723 -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 (2.06s) 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$length9(&(0x7f0000000000)={&(0x7f0000ffb000/0x2000)=nil, 0x2000}) (fail_nth: 1) syz_mmap(&(0x7f0000ffc000/0x1000)=nil, 0x1000) (async) test$vma0(&(0x7f0000ffc000/0x1000)=nil, 0x1000, &(0x7f0000ff8000/0x5000)=nil, 0x5000, &(0x7f0000ff4000/0x9000)=nil, 0x9000) (rerun: 4) test$vma0(&(0x7f0000ff8000/0x2000)=nil, 0x2000, &(0x7f0000ffa000/0x5000)=nil, 0x5000, &(0x7f0000ff8000/0x8000)=nil, 0x8000) test$length0(&(0x7f0000000040)={0x0, 0x2}) test$length10(&(0x7f0000ff4000/0x4000)=nil, 0x4000, 0x4000, 0x2000, 0x1000) test$length10(&(0x7f0000ffd000/0x3000)=nil, 0x3000, 0x3000, 0x1800, 0xc00) test$opt2(0x0) test$str2(&(0x7f0000000080)='bar\x00') test$opt2(&(0x7f0000ff7000/0x2000)=nil) syz_compare(&(0x7f0000000000)='!/\x00', 0x3, &(0x7f0000000040)=@bf15={0x5c, {0x2, 0x4, 0x4}}, 0x8) syz_compare_int$2(0x2, 0x6, 0x8) syz_errno(0x6) syz_execute_func(&(0x7f0000000080)="882b1f021c62706eb46a65c15699e520056b4acb14fe3174d5f8c90afa893cc1d9eb629e4081f2cb6a2c8f4c8f0668fdbeac") syz_exit(0x4) syz_mmap(&(0x7f0000ffa000/0x3000)=nil, 0x3000) syz_sleep_ms(0x1f) syz_test_fuzzer1(0x4, 0x8, 0x0) csource_test.go:151: failed to build program: // autogenerated by syzkaller (https://github.com/google/syzkaller) #define _GNU_SOURCE #include #include #include #include #include #include #include #include #include #include #include #include #ifndef SYS_test #define SYS_test 0 #endif static void sleep_ms(uint64_t ms) { usleep(ms * 1000); } static uint64_t current_time_ms(void) { struct timespec ts; if (clock_gettime(CLOCK_MONOTONIC, &ts)) exit(1); return (uint64_t)ts.tv_sec * 1000 + (uint64_t)ts.tv_nsec / 1000000; } static void use_temporary_dir(void) { char tmpdir_template[] = "./syzkaller.XXXXXX"; char* tmpdir = mkdtemp(tmpdir_template); if (!tmpdir) exit(1); if (chmod(tmpdir, 0777)) exit(1); if (chdir(tmpdir)) exit(1); } static int inject_fault(int nth) { return 0; } static void setup_fault() { } static void thread_start(void* (*fn)(void*), void* arg) { pthread_t th; pthread_attr_t attr; pthread_attr_init(&attr); pthread_attr_setstacksize(&attr, 128 << 10); int i = 0; for (; i < 100; i++) { if (pthread_create(&th, &attr, fn, arg) == 0) { pthread_attr_destroy(&attr); return; } if (errno == EAGAIN) { usleep(50); continue; } break; } exit(1); } typedef struct { pthread_mutex_t mu; pthread_cond_t cv; int state; } event_t; static void event_init(event_t* ev) { if (pthread_mutex_init(&ev->mu, 0)) exit(1); if (pthread_cond_init(&ev->cv, 0)) exit(1); ev->state = 0; } static void event_reset(event_t* ev) { ev->state = 0; } static void event_set(event_t* ev) { pthread_mutex_lock(&ev->mu); if (ev->state) exit(1); ev->state = 1; pthread_mutex_unlock(&ev->mu); pthread_cond_broadcast(&ev->cv); } static void event_wait(event_t* ev) { pthread_mutex_lock(&ev->mu); while (!ev->state) pthread_cond_wait(&ev->cv, &ev->mu); pthread_mutex_unlock(&ev->mu); } static int event_isset(event_t* ev) { pthread_mutex_lock(&ev->mu); int res = ev->state; pthread_mutex_unlock(&ev->mu); return res; } static int event_timedwait(event_t* ev, uint64_t timeout) { uint64_t start = current_time_ms(); uint64_t now = start; pthread_mutex_lock(&ev->mu); for (;;) { if (ev->state) break; uint64_t remain = timeout - (now - start); struct timespec ts; ts.tv_sec = remain / 1000; ts.tv_nsec = (remain % 1000) * 1000 * 1000; pthread_cond_timedwait(&ev->cv, &ev->mu, &ts); now = current_time_ms(); if (now - start > timeout) break; } int res = ev->state; pthread_mutex_unlock(&ev->mu); return res; } #define BITMASK(bf_off,bf_len) (((1ull << (bf_len)) - 1) << (bf_off)) #define STORE_BY_BITMASK(type,htobe,addr,val,bf_off,bf_len) *(type*)(addr) = htobe((htobe(*(type*)(addr)) & ~BITMASK((bf_off), (bf_len))) | (((type)(val) << (bf_off)) & BITMASK((bf_off), (bf_len)))) static long syz_mmap(volatile long a0, volatile long a1) { return (long)mmap((void*)a0, a1, PROT_READ | PROT_WRITE, MAP_ANON | MAP_PRIVATE | MAP_FIXED, -1, 0); } static long syz_errno(volatile long v) { errno = v; return v == 0 ? 0 : -1; } static long syz_exit(volatile long status) { _exit(status); return 0; } static long syz_sleep_ms(volatile long ms) { sleep_ms(ms); return 0; } static long syz_compare(volatile long want, volatile long want_len, volatile long got, volatile long got_len) { if (want_len != got_len) { errno = EBADF; goto error; } if (memcmp((void*)want, (void*)got, want_len)) { errno = EINVAL; goto error; } return 0; error: return -1; } static long syz_compare_int(volatile long n, ...) { va_list args; va_start(args, n); long v0 = va_arg(args, long); long v1 = va_arg(args, long); long v2 = va_arg(args, long); long v3 = va_arg(args, long); va_end(args); if (n < 2 || n > 4) return errno = E2BIG, -1; if (n <= 2 && v2 != 0) return errno = EFAULT, -1; if (n <= 3 && v3 != 0) return errno = EFAULT, -1; if (v0 != v1) return errno = EINVAL, -1; if (n > 2 && v0 != v2) return errno = EINVAL, -1; if (n > 3 && v0 != v3) return errno = EINVAL, -1; return 0; } static void 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(); } void execute_call(int call) { switch (call) { case 0: *(uint64_t*)0x20000000 = 0x20ffb000; *(uint64_t*)0x20000008 = 0x2000; inject_fault(1); syscall(SYS_test, /*a0=*/0x20000000ul, 0, 0, 0, 0, 0); break; case 1: syz_mmap(/*addr=*/0x20ffc000, /*len=*/0x1000); break; case 2: syscall(SYS_test, /*v0=*/0x20ffc000ul, /*l0=*/0, /*v1=*/0x20ff8000ul, /*l1=*/0x5000, /*v2=*/0x20ff4000ul, /*l2=*/0x9000ul); { int i; for(i = 0; i < 4; i++) { syscall(SYS_test, /*v0=*/0x20ffc000ul, /*l0=*/0, /*v1=*/0x20ff8000ul, /*l1=*/0x5000, /*v2=*/0x20ff4000ul, /*l2=*/0x9000ul); } } break; case 3: syscall(SYS_test, /*v0=*/0x20ff8000ul, /*l0=*/0, /*v1=*/0x20ffa000ul, /*l1=*/0x5000, /*v2=*/0x20ff8000ul, /*l2=*/0x8000ul); break; case 4: *(uint16_t*)0x20000040 = 0; *(uint16_t*)0x20000042 = 2; syscall(SYS_test, /*a0=*/0x20000040ul, 0, 0, 0, 0, 0); break; case 5: syscall(SYS_test, /*a0=*/0x20ff4000ul, /*a1=*/0, /*a2=*/0x4000, /*a3=*/0x2000, /*a4=*/0x1000ul, 0); break; case 6: syscall(SYS_test, /*a0=*/0x20ffd000ul, /*a1=*/0, /*a2=*/0x3000, /*a3=*/0x1800, /*a4=*/0xc00ul, 0); break; case 7: syscall(SYS_test, /*a0=*/0ul, 0, 0, 0, 0, 0); break; case 8: memcpy((void*)0x20000080, "bar\000", 4); syscall(SYS_test, /*a=*/0x20000080ul, 0, 0, 0, 0, 0); break; case 9: syscall(SYS_test, /*a0=*/0x20ff7000ul, 0, 0, 0, 0, 0); break; case 10: memcpy((void*)0x20000000, "!/\000", 3); *(uint8_t*)0x20000040 = 0x5c; *(uint8_t*)0x20000044 = 2; STORE_BY_BITMASK(uint32_t, , 0x20000044, 4, 8, 12); STORE_BY_BITMASK(uint16_t, , 0x20000046, 4, 4, 4); syz_compare(/*want=*/0x20000000, /*want_len=*/3, /*got=*/0x20000040, /*got_len=*/8); break; case 11: syz_compare_int(/*n=*/2, /*v0=*/6, /*v1=*/8, 0, 0); break; case 12: syz_errno(/*v=*/6); break; case 13: memcpy((void*)0x20000080, "\x88\x2b\x1f\x02\x1c\x62\x70\x6e\xb4\x6a\x65\xc1\x56\x99\xe5\x20\x05\x6b\x4a\xcb\x14\xfe\x31\x74\xd5\xf8\xc9\x0a\xfa\x89\x3c\xc1\xd9\xeb\x62\x9e\x40\x81\xf2\xcb\x6a\x2c\x8f\x4c\x8f\x06\x68\xfd\xbe\xac", 50); syz_execute_func(/*text=*/0x20000080); break; case 14: syz_exit(/*status=*/4); break; case 15: syz_mmap(/*addr=*/0x20ffa000, /*len=*/0x3000); break; case 16: syz_sleep_ms(/*ms=*/0x1f); break; case 17: syz_test_fuzzer1(/*a=*/4, /*b=*/8, /*c=*/0); break; } } int main(void) { syz_mmap(/*addr=*/0x20000000, /*len=*/0x1000000); setup_fault(); use_temporary_dir(); loop(); return 0; } :296:3: 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-executor2285961120 -DGOOS_test=1 -DGOARCH_64=1 -DHOSTGOOS_openbsd=1 -x c - -m64 -lutil -O2 -pthread -Wall -Werror -Wparentheses -Wunused-const-variable -Wframe-larger-than=16384 -Wno-array-bounds -Wno-unused-but-set-variable -Wno-unused-command-line-argument -no-pie -fno-exceptions] --- FAIL: TestGenerate/test/64/1 (1.40s) csource_test.go:150: opts: {Threaded:true Repeat:true RepeatTimes:0 Procs:0 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:false NetDevices:false NetReset:false Cgroups:false BinfmtMisc:false CloseFDs:false KCSAN:false DevlinkPCI:false NicVF:false USB:false VhciInjection:false Wifi:false IEEE802154:false Sysctl:false Swap:false UseTmpDir:true HandleSegv:false Repro:false Trace:false LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}} program: test$length9(&(0x7f0000000000)={&(0x7f0000ffb000/0x2000)=nil, 0x2000}) (fail_nth: 1) syz_mmap(&(0x7f0000ffc000/0x1000)=nil, 0x1000) (async) test$vma0(&(0x7f0000ffc000/0x1000)=nil, 0x1000, &(0x7f0000ff8000/0x5000)=nil, 0x5000, &(0x7f0000ff4000/0x9000)=nil, 0x9000) (rerun: 4) test$vma0(&(0x7f0000ff8000/0x2000)=nil, 0x2000, &(0x7f0000ffa000/0x5000)=nil, 0x5000, &(0x7f0000ff8000/0x8000)=nil, 0x8000) test$length0(&(0x7f0000000040)={0x0, 0x2}) test$length10(&(0x7f0000ff4000/0x4000)=nil, 0x4000, 0x4000, 0x2000, 0x1000) test$length10(&(0x7f0000ffd000/0x3000)=nil, 0x3000, 0x3000, 0x1800, 0xc00) test$opt2(0x0) test$str2(&(0x7f0000000080)='bar\x00') test$opt2(&(0x7f0000ff7000/0x2000)=nil) syz_compare(&(0x7f0000000000)='!/\x00', 0x3, &(0x7f0000000040)=@bf15={0x5c, {0x2, 0x4, 0x4}}, 0x8) syz_compare_int$2(0x2, 0x6, 0x8) syz_errno(0x6) syz_execute_func(&(0x7f0000000080)="882b1f021c62706eb46a65c15699e520056b4acb14fe3174d5f8c90afa893cc1d9eb629e4081f2cb6a2c8f4c8f0668fdbeac") syz_exit(0x4) syz_mmap(&(0x7f0000ffa000/0x3000)=nil, 0x3000) syz_sleep_ms(0x1f) syz_test_fuzzer1(0x4, 0x8, 0x0) csource_test.go:151: failed to build program: // autogenerated by syzkaller (https://github.com/google/syzkaller) #define _GNU_SOURCE #include #include #include #include #include #include #include #include #include #include #include #include #ifndef SYS_test #define SYS_test 0 #endif static void sleep_ms(uint64_t ms) { usleep(ms * 1000); } static uint64_t current_time_ms(void) { struct timespec ts; if (clock_gettime(CLOCK_MONOTONIC, &ts)) exit(1); return (uint64_t)ts.tv_sec * 1000 + (uint64_t)ts.tv_nsec / 1000000; } static void use_temporary_dir(void) { char tmpdir_template[] = "./syzkaller.XXXXXX"; char* tmpdir = mkdtemp(tmpdir_template); if (!tmpdir) exit(1); if (chmod(tmpdir, 0777)) exit(1); if (chdir(tmpdir)) exit(1); } static int inject_fault(int nth) { return 0; } static void setup_fault() { } static void thread_start(void* (*fn)(void*), void* arg) { pthread_t th; pthread_attr_t attr; pthread_attr_init(&attr); pthread_attr_setstacksize(&attr, 128 << 10); int i = 0; for (; i < 100; i++) { if (pthread_create(&th, &attr, fn, arg) == 0) { pthread_attr_destroy(&attr); return; } if (errno == EAGAIN) { usleep(50); continue; } break; } exit(1); } typedef struct { pthread_mutex_t mu; pthread_cond_t cv; int state; } event_t; static void event_init(event_t* ev) { if (pthread_mutex_init(&ev->mu, 0)) exit(1); if (pthread_cond_init(&ev->cv, 0)) exit(1); ev->state = 0; } static void event_reset(event_t* ev) { ev->state = 0; } static void event_set(event_t* ev) { pthread_mutex_lock(&ev->mu); if (ev->state) exit(1); ev->state = 1; pthread_mutex_unlock(&ev->mu); pthread_cond_broadcast(&ev->cv); } static void event_wait(event_t* ev) { pthread_mutex_lock(&ev->mu); while (!ev->state) pthread_cond_wait(&ev->cv, &ev->mu); pthread_mutex_unlock(&ev->mu); } static int event_isset(event_t* ev) { pthread_mutex_lock(&ev->mu); int res = ev->state; pthread_mutex_unlock(&ev->mu); return res; } static int event_timedwait(event_t* ev, uint64_t timeout) { uint64_t start = current_time_ms(); uint64_t now = start; pthread_mutex_lock(&ev->mu); for (;;) { if (ev->state) break; uint64_t remain = timeout - (now - start); struct timespec ts; ts.tv_sec = remain / 1000; ts.tv_nsec = (remain % 1000) * 1000 * 1000; pthread_cond_timedwait(&ev->cv, &ev->mu, &ts); now = current_time_ms(); if (now - start > timeout) break; } int res = ev->state; pthread_mutex_unlock(&ev->mu); return res; } #define BITMASK(bf_off,bf_len) (((1ull << (bf_len)) - 1) << (bf_off)) #define STORE_BY_BITMASK(type,htobe,addr,val,bf_off,bf_len) *(type*)(addr) = htobe((htobe(*(type*)(addr)) & ~BITMASK((bf_off), (bf_len))) | (((type)(val) << (bf_off)) & BITMASK((bf_off), (bf_len)))) static long syz_mmap(volatile long a0, volatile long a1) { return (long)mmap((void*)a0, a1, PROT_READ | PROT_WRITE, MAP_ANON | MAP_PRIVATE | MAP_FIXED, -1, 0); } static long syz_errno(volatile long v) { errno = v; return v == 0 ? 0 : -1; } static long syz_exit(volatile long status) { _exit(status); return 0; } static long syz_sleep_ms(volatile long ms) { sleep_ms(ms); return 0; } static long syz_compare(volatile long want, volatile long want_len, volatile long got, volatile long got_len) { if (want_len != got_len) { errno = EBADF; goto error; } if (memcmp((void*)want, (void*)got, want_len)) { errno = EINVAL; goto error; } return 0; error: return -1; } static long syz_compare_int(volatile long n, ...) { va_list args; va_start(args, n); long v0 = va_arg(args, long); long v1 = va_arg(args, long); long v2 = va_arg(args, long); long v3 = va_arg(args, long); va_end(args); if (n < 2 || n > 4) return errno = E2BIG, -1; if (n <= 2 && v2 != 0) return errno = EFAULT, -1; if (n <= 3 && v3 != 0) return errno = EFAULT, -1; if (v0 != v1) return errno = EINVAL, -1; if (n > 2 && v0 != v2) return errno = EINVAL, -1; if (n > 3 && v0 != v3) return errno = EINVAL, -1; return 0; } static void loop(); static int do_sandbox_none(void) { loop(); return 0; } static void fake_crash(const char* name) { exit(1); exit(1); } static long syz_test_fuzzer1(volatile long a, volatile long b, volatile long c) { if (a == 1 && b == 1 && c == 1) fake_crash("first bug"); if (a == 1 && b == 2 && c == 3) fake_crash("second bug"); return 0; } static long syz_execute_func(volatile long text) { ((void (*)(void))(text))(); return 0; } struct thread_t { int created, call; event_t ready, done; }; static struct thread_t threads[16]; static void execute_call(int call); static int running; static void* thr(void* arg) { struct thread_t* th = (struct thread_t*)arg; for (;;) { event_wait(&th->ready); event_reset(&th->ready); execute_call(th->call); __atomic_fetch_sub(&running, 1, __ATOMIC_RELAXED); event_set(&th->done); } return 0; } static void execute_one(void) { int i, call, thread; for (call = 0; call < 18; call++) { for (thread = 0; thread < (int)(sizeof(threads) / sizeof(threads[0])); thread++) { struct thread_t* th = &threads[thread]; if (!th->created) { th->created = 1; event_init(&th->ready); event_init(&th->done); event_set(&th->done); thread_start(thr, th); } if (!event_isset(&th->done)) continue; event_reset(&th->done); th->call = call; __atomic_fetch_add(&running, 1, __ATOMIC_RELAXED); event_set(&th->ready); if (call == 1) break; event_timedwait(&th->done, 50); break; } } for (i = 0; i < 100 && __atomic_load_n(&running, __ATOMIC_RELAXED); i++) sleep_ms(1); } static void execute_one(void); static void loop(void) { execute_one(); } void execute_call(int call) { switch (call) { case 0: *(uint64_t*)0x20000000 = 0x20ffb000; *(uint64_t*)0x20000008 = 0x2000; inject_fault(1); syscall(SYS_test, /*a0=*/0x20000000ul, 0, 0, 0, 0, 0); break; case 1: syz_mmap(/*addr=*/0x20ffc000, /*len=*/0x1000); break; case 2: syscall(SYS_test, /*v0=*/0x20ffc000ul, /*l0=*/0, /*v1=*/0x20ff8000ul, /*l1=*/0x5000, /*v2=*/0x20ff4000ul, /*l2=*/0x9000ul); { int i; for(i = 0; i < 4; i++) { syscall(SYS_test, /*v0=*/0x20ffc000ul, /*l0=*/0, /*v1=*/0x20ff8000ul, /*l1=*/0x5000, /*v2=*/0x20ff4000ul, /*l2=*/0x9000ul); } } break; case 3: syscall(SYS_test, /*v0=*/0x20ff8000ul, /*l0=*/0, /*v1=*/0x20ffa000ul, /*l1=*/0x5000, /*v2=*/0x20ff8000ul, /*l2=*/0x8000ul); break; case 4: *(uint16_t*)0x20000040 = 0; *(uint16_t*)0x20000042 = 2; syscall(SYS_test, /*a0=*/0x20000040ul, 0, 0, 0, 0, 0); break; case 5: syscall(SYS_test, /*a0=*/0x20ff4000ul, /*a1=*/0, /*a2=*/0x4000, /*a3=*/0x2000, /*a4=*/0x1000ul, 0); break; case 6: syscall(SYS_test, /*a0=*/0x20ffd000ul, /*a1=*/0, /*a2=*/0x3000, /*a3=*/0x1800, /*a4=*/0xc00ul, 0); break; case 7: syscall(SYS_test, /*a0=*/0ul, 0, 0, 0, 0, 0); break; case 8: memcpy((void*)0x20000080, "bar\000", 4); syscall(SYS_test, /*a=*/0x20000080ul, 0, 0, 0, 0, 0); break; case 9: syscall(SYS_test, /*a0=*/0x20ff7000ul, 0, 0, 0, 0, 0); break; case 10: memcpy((void*)0x20000000, "!/\000", 3); *(uint8_t*)0x20000040 = 0x5c; *(uint8_t*)0x20000044 = 2; STORE_BY_BITMASK(uint32_t, , 0x20000044, 4, 8, 12); STORE_BY_BITMASK(uint16_t, , 0x20000046, 4, 4, 4); syz_compare(/*want=*/0x20000000, /*want_len=*/3, /*got=*/0x20000040, /*got_len=*/8); break; case 11: syz_compare_int(/*n=*/2, /*v0=*/6, /*v1=*/8, 0, 0); break; case 12: syz_errno(/*v=*/6); break; case 13: memcpy((void*)0x20000080, "\x88\x2b\x1f\x02\x1c\x62\x70\x6e\xb4\x6a\x65\xc1\x56\x99\xe5\x20\x05\x6b\x4a\xcb\x14\xfe\x31\x74\xd5\xf8\xc9\x0a\xfa\x89\x3c\xc1\xd9\xeb\x62\x9e\x40\x81\xf2\xcb\x6a\x2c\x8f\x4c\x8f\x06\x68\xfd\xbe\xac", 50); syz_execute_func(/*text=*/0x20000080); break; case 14: syz_exit(/*status=*/4); break; case 15: syz_mmap(/*addr=*/0x20ffa000, /*len=*/0x3000); break; case 16: syz_sleep_ms(/*ms=*/0x1f); break; case 17: syz_test_fuzzer1(/*a=*/4, /*b=*/8, /*c=*/0); break; } } int main(void) { syz_mmap(/*addr=*/0x20000000, /*len=*/0x1000000); setup_fault(); use_temporary_dir(); do_sandbox_none(); return 0; } :303:3: 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-executor1795326623 -DGOOS_test=1 -DGOARCH_64=1 -DHOSTGOOS_openbsd=1 -x c - -m64 -lutil -O2 -pthread -Wall -Werror -Wparentheses -Wunused-const-variable -Wframe-larger-than=16384 -Wno-array-bounds -Wno-unused-but-set-variable -Wno-unused-command-line-argument -no-pie -fno-exceptions] --- FAIL: TestGenerate/test/64/8 (2.18s) csource_test.go:148: --- FAIL: TestGenerate/test/64/4 (2.02s) csource_test.go:148: --- FAIL: TestGenerate/test/64/14 (1.71s) csource_test.go:148: --- FAIL: TestGenerate/test/64/13 (1.96s) csource_test.go:148: FAIL FAIL github.com/google/syzkaller/pkg/csource 35.421s 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) ? 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-upgrade [no test files] ? github.com/google/syzkaller/tools/syz-tty [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/tools/syz-usbgen [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/cuttlefish [no test files] ? github.com/google/syzkaller/vm/kvm [no test files] ? github.com/google/syzkaller/vm/odroid [no test files] ? github.com/google/syzkaller/vm/proxyapp/mocks [no test files] ? github.com/google/syzkaller/vm/proxyapp/proxyrpc [no test files] ? github.com/google/syzkaller/vm/qemu [no test files] ? github.com/google/syzkaller/vm/starnix [no test files] ? github.com/google/syzkaller/vm/vmm [no test files] ? github.com/google/syzkaller/vm/vmware [no test files] ok github.com/google/syzkaller/syz-ci 15.382s ok github.com/google/syzkaller/syz-fuzzer (cached) ok github.com/google/syzkaller/syz-hub (cached) ok github.com/google/syzkaller/syz-hub/state (cached) ok github.com/google/syzkaller/syz-manager (cached) 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