ok github.com/google/syzkaller/dashboard/app (cached) ? github.com/google/syzkaller/dashboard/dashapi [no test files] ok github.com/google/syzkaller/executor 1.147s ok github.com/google/syzkaller/pkg/ast 3.984s ok github.com/google/syzkaller/pkg/bisect (cached) ok github.com/google/syzkaller/pkg/build (cached) ok github.com/google/syzkaller/pkg/compiler 18.725s ok github.com/google/syzkaller/pkg/config (cached) ok github.com/google/syzkaller/pkg/cover (cached) ? github.com/google/syzkaller/pkg/cover/backend [no test files] --- FAIL: TestGenerate (5.98s) --- FAIL: TestGenerate/openbsd/amd64 (0.69s) csource_test.go:68: seed=1609316322857620777 --- FAIL: TestGenerate/openbsd/amd64/0 (3.17s) csource_test.go:124: opts: {Threaded:false Collide:false Repeat:true RepeatTimes:0 Procs:0 Slowdown:1 Sandbox:none Fault:false FaultCall:0 FaultNth:0 Leak:false NetInjection:false NetDevices:false NetReset:false Cgroups:false BinfmtMisc:false CloseFDs:false KCSAN:false DevlinkPCI:false USB:false VhciInjection:false Wifi:false Sysctl:false UseTmpDir:true HandleSegv:false Repro:false Trace:false} program: r0 = accept$unix(0xffffffffffffffff, 0x0, &(0x7f0000000000)) bind$unix(r0, &(0x7f0000000040)=@abs={0x0, 0x0, 0x2}, 0x8) fchownat(0xffffffffffffffff, &(0x7f0000000080)='./file0\x00', 0x0, 0xffffffffffffffff, 0x2) r1 = openat$bpf(0xffffffffffffff9c, &(0x7f00000000c0)='/dev/bpf\x00', 0x800, 0x0) ioctl$BIOCFLUSH(r1, 0x20004268) ioctl$WSDISPLAYIO_GETSCREEN(0xffffffffffffffff, 0xc0245755, &(0x7f0000000100)={0xfff, './file0\x00', './file0\x00'}) readlink(&(0x7f0000000140)='./file0\x00', &(0x7f0000000180)=""/75, 0x4b) ioctl$WSDISPLAYIO_GETSCREEN(0xffffffffffffffff, 0xc0245755, &(0x7f0000000200)={0x100, './file0\x00', './file0\x00'}) r2 = getgid() setgroups(0x6, &(0x7f0000000240)=[r2, 0x0, 0xffffffffffffffff, 0x0, 0x0, 0x0]) syz_emit_ethernet(0xc5, &(0x7f0000000000)={@local, @random="45ef64586744", [], {@generic={0x9e0, "441625798406e69abe1b79bf2ed635c5e5ebe11dd048c4d04ec7d91f74dae484942cb6bbbb2cca8dc1bddfb112e679c303010ec36ef4aa42a6a5e5f1090b2d04b6026b471cbf450d2f7bff65f44ee43aeb89a0f09e0dc78d4eb23d9abb0548a85779a9d4dcc0453f5c05c5087cc7a5671112f1d32ee3fa5bdce04172766f5b1823965bdeaca824d3ed0f0d4d4dbd5752ff05419dc1d381fa8cdda9569894dd2a356dc8b6164cd86839a968cefb39b6877e959ff6272802"}}}) syz_execute_func(&(0x7f0000000100)="c4a19972d42966430fe70b3643d9415066f3430f120c48c483fd00dc000f38f943acf2a4664581c1d1bf41792bc403ad7c620074") syz_extract_tcp_res(&(0x7f0000000140), 0x2, 0xffffff43) syz_open_pts() csource_test.go:125: 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 #include #include #include #include #include #include #include #include static void kill_and_wait(int pid, int* status) { kill(pid, SIGKILL); while (waitpid(-1, status, 0) != pid) { } } 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 void __attribute__((noinline)) remove_dir(const char* dir) { DIR* dp = opendir(dir); if (dp == NULL) { if (errno == EACCES) { if (rmdir(dir)) exit(1); return; } exit(1); } struct dirent* ep = 0; while ((ep = readdir(dp))) { if (strcmp(ep->d_name, ".") == 0 || strcmp(ep->d_name, "..") == 0) continue; char filename[FILENAME_MAX]; snprintf(filename, sizeof(filename), "%s/%s", dir, ep->d_name); struct stat st; if (lstat(filename, &st)) exit(1); if (S_ISDIR(st.st_mode)) { remove_dir(filename); continue; } if (unlink(filename)) exit(1); } closedir(dp); if (rmdir(dir)) exit(1); } #define __syscall syscall static uintptr_t syz_open_pts(void) { int master, slave; if (openpty(&master, &slave, NULL, NULL, NULL) == -1) return -1; if (dup2(master, master + 100) != -1) close(master); return slave; } static void sandbox_common() { if (setsid() == -1) exit(1); struct rlimit rlim; rlim.rlim_cur = rlim.rlim_max = 8 << 20; setrlimit(RLIMIT_MEMLOCK, &rlim); rlim.rlim_cur = rlim.rlim_max = 1 << 20; setrlimit(RLIMIT_FSIZE, &rlim); rlim.rlim_cur = rlim.rlim_max = 1 << 20; setrlimit(RLIMIT_STACK, &rlim); rlim.rlim_cur = rlim.rlim_max = 0; setrlimit(RLIMIT_CORE, &rlim); rlim.rlim_cur = rlim.rlim_max = 256; setrlimit(RLIMIT_NOFILE, &rlim); } static void loop(); static int do_sandbox_none(void) { sandbox_common(); loop(); return 0; } static long syz_execute_func(volatile long text) { ((void (*)(void))(text))(); return 0; } static void execute_one(void); #define WAIT_FLAGS 0 static void loop(void) { int iter = 0; for (;; iter++) { char cwdbuf[32]; sprintf(cwdbuf, "./%d", iter); if (mkdir(cwdbuf, 0777)) exit(1); int pid = fork(); if (pid < 0) exit(1); if (pid == 0) { if (chdir(cwdbuf)) exit(1); execute_one(); exit(0); } int status = 0; uint64_t start = current_time_ms(); for (;;) { if (waitpid(-1, &status, WNOHANG | WAIT_FLAGS) == pid) break; sleep_ms(1); if (current_time_ms() - start < 5000) continue; kill_and_wait(pid, &status); break; } remove_dir(cwdbuf); } } uint64_t r[3] = {0xffffffffffffffff, 0xffffffffffffffff, 0x0}; void execute_one(void) { intptr_t res = 0; *(uint32_t*)0x20000000 = 0; res = syscall(SYS_accept, -1, 0ul, 0x20000000ul); if (res != -1) r[0] = res; *(uint16_t*)0x20000040 = 0; *(uint8_t*)0x20000042 = 0; *(uint32_t*)0x20000044 = 0x4e22; syscall(SYS_bind, r[0], 0x20000040ul, 8ul); memcpy((void*)0x20000080, "./file0\000", 8); syscall(SYS_fchownat, -1, 0x20000080ul, 0, -1, 2ul); memcpy((void*)0x200000c0, "/dev/bpf\000", 9); res = syscall(SYS_openat, 0xffffffffffffff9cul, 0x200000c0ul, 0x800ul, 0ul); if (res != -1) r[1] = res; syscall(SYS_ioctl, r[1], 0x20004268ul, 0); *(uint32_t*)0x20000100 = 0xfff; memcpy((void*)0x20000104, "./file0\000\000\000\000\000\000\000\000\000", 16); memcpy((void*)0x20000114, "./file0\000\000\000\000\000\000\000\000\000", 16); syscall(SYS_ioctl, -1, 0xc0245755ul, 0x20000100ul); memcpy((void*)0x20000140, "./file0\000", 8); syscall(SYS_readlink, 0x20000140ul, 0x20000180ul, 0x4bul); *(uint32_t*)0x20000200 = 0x100; memcpy((void*)0x20000204, "./file0\000\000\000\000\000\000\000\000\000", 16); memcpy((void*)0x20000214, "./file0\000\000\000\000\000\000\000\000\000", 16); syscall(SYS_ioctl, -1, 0xc0245755ul, 0x20000200ul); res = syscall(SYS_getgid); if (res != -1) r[2] = res; *(uint32_t*)0x20000240 = r[2]; *(uint32_t*)0x20000244 = 0; *(uint32_t*)0x20000248 = -1; *(uint32_t*)0x2000024c = 0; *(uint32_t*)0x20000250 = 0; *(uint32_t*)0x20000254 = 0; syscall(SYS_setgroups, 6ul, 0x20000240ul); *(uint8_t*)0x20000000 = 0xaa; *(uint8_t*)0x20000001 = 0xaa; *(uint8_t*)0x20000002 = 0xaa; *(uint8_t*)0x20000003 = 0xaa; *(uint8_t*)0x20000004 = 0xaa; *(uint8_t*)0x20000005 = 0xaa; memcpy((void*)0x20000006, "\x45\xef\x64\x58\x67\x44", 6); *(uint16_t*)0x2000000c = htobe16(0x9e0); memcpy((void*)0x2000000e, "\x44\x16\x25\x79\x84\x06\xe6\x9a\xbe\x1b\x79\xbf\x2e\xd6\x35\xc5\xe5\xeb\xe1\x1d\xd0\x48\xc4\xd0\x4e\xc7\xd9\x1f\x74\xda\xe4\x84\x94\x2c\xb6\xbb\xbb\x2c\xca\x8d\xc1\xbd\xdf\xb1\x12\xe6\x79\xc3\x03\x01\x0e\xc3\x6e\xf4\xaa\x42\xa6\xa5\xe5\xf1\x09\x0b\x2d\x04\xb6\x02\x6b\x47\x1c\xbf\x45\x0d\x2f\x7b\xff\x65\xf4\x4e\xe4\x3a\xeb\x89\xa0\xf0\x9e\x0d\xc7\x8d\x4e\xb2\x3d\x9a\xbb\x05\x48\xa8\x57\x79\xa9\xd4\xdc\xc0\x45\x3f\x5c\x05\xc5\x08\x7c\xc7\xa5\x67\x11\x12\xf1\xd3\x2e\xe3\xfa\x5b\xdc\xe0\x41\x72\x76\x6f\x5b\x18\x23\x96\x5b\xde\xac\xa8\x24\xd3\xed\x0f\x0d\x4d\x4d\xbd\x57\x52\xff\x05\x41\x9d\xc1\xd3\x81\xfa\x8c\xdd\xa9\x56\x98\x94\xdd\x2a\x35\x6d\xc8\xb6\x16\x4c\xd8\x68\x39\xa9\x68\xce\xfb\x39\xb6\x87\x7e\x95\x9f\xf6\x27\x28\x02", 183); memcpy((void*)0x20000100, "\xc4\xa1\x99\x72\xd4\x29\x66\x43\x0f\xe7\x0b\x36\x43\xd9\x41\x50\x66\xf3\x43\x0f\x12\x0c\x48\xc4\x83\xfd\x00\xdc\x00\x0f\x38\xf9\x43\xac\xf2\xa4\x66\x45\x81\xc1\xd1\xbf\x41\x79\x2b\xc4\x03\xad\x7c\x62\x00\x74", 52); syz_execute_func(0x20000100); syz_open_pts(); } int main(void) { syscall(SYS_mmap, 0x20000000ul, 0x1000000ul, 3ul, 0x1012ul, -1, 0ul, 0ul); use_temporary_dir(); do_sandbox_none(); return 0; } :163:4: error: misleading indentation; statement is not part of the previous 'if' [-Werror,-Wmisleading-indentation] kill_and_wait(pid, &status); ^ :161:3: note: previous statement is here if (current_time_ms() - start < 5000) ^ 1 error generated. compiler invocation: c++ [-o /tmp/syz-executor891876868 -DGOOS_openbsd=1 -DGOARCH_amd64=1 -DHOSTGOOS_openbsd=1 -x c - -m64 -static -lutil -O2 -pthread -Wall -Werror -Wparentheses -Wunused-const-variable -Wframe-larger-than=16384] --- FAIL: TestGenerate/openbsd/amd64/8 (3.20s) csource_test.go:124: opts: {Threaded:true Collide:false Repeat:true RepeatTimes:0 Procs:0 Slowdown:1 Sandbox: Fault:false FaultCall:0 FaultNth:0 Leak:false NetInjection:false NetDevices:false NetReset:false Cgroups:false BinfmtMisc:false CloseFDs:false KCSAN:false DevlinkPCI:false USB:false VhciInjection:false Wifi:false Sysctl:false UseTmpDir:true HandleSegv:false Repro:false Trace:false} program: r0 = accept$unix(0xffffffffffffffff, 0x0, &(0x7f0000000000)) bind$unix(r0, &(0x7f0000000040)=@abs={0x0, 0x0, 0x2}, 0x8) fchownat(0xffffffffffffffff, &(0x7f0000000080)='./file0\x00', 0x0, 0xffffffffffffffff, 0x2) r1 = openat$bpf(0xffffffffffffff9c, &(0x7f00000000c0)='/dev/bpf\x00', 0x800, 0x0) ioctl$BIOCFLUSH(r1, 0x20004268) ioctl$WSDISPLAYIO_GETSCREEN(0xffffffffffffffff, 0xc0245755, &(0x7f0000000100)={0xfff, './file0\x00', './file0\x00'}) readlink(&(0x7f0000000140)='./file0\x00', &(0x7f0000000180)=""/75, 0x4b) ioctl$WSDISPLAYIO_GETSCREEN(0xffffffffffffffff, 0xc0245755, &(0x7f0000000200)={0x100, './file0\x00', './file0\x00'}) r2 = getgid() setgroups(0x6, &(0x7f0000000240)=[r2, 0x0, 0xffffffffffffffff, 0x0, 0x0, 0x0]) syz_emit_ethernet(0xc5, &(0x7f0000000000)={@local, @random="45ef64586744", [], {@generic={0x9e0, "441625798406e69abe1b79bf2ed635c5e5ebe11dd048c4d04ec7d91f74dae484942cb6bbbb2cca8dc1bddfb112e679c303010ec36ef4aa42a6a5e5f1090b2d04b6026b471cbf450d2f7bff65f44ee43aeb89a0f09e0dc78d4eb23d9abb0548a85779a9d4dcc0453f5c05c5087cc7a5671112f1d32ee3fa5bdce04172766f5b1823965bdeaca824d3ed0f0d4d4dbd5752ff05419dc1d381fa8cdda9569894dd2a356dc8b6164cd86839a968cefb39b6877e959ff6272802"}}}) syz_execute_func(&(0x7f0000000100)="c4a19972d42966430fe70b3643d9415066f3430f120c48c483fd00dc000f38f943acf2a4664581c1d1bf41792bc403ad7c620074") syz_extract_tcp_res(&(0x7f0000000140), 0x2, 0xffffff43) syz_open_pts() csource_test.go:125: 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 #include #include #include #include #include #include #include #include static void kill_and_wait(int pid, int* status) { kill(pid, SIGKILL); while (waitpid(-1, status, 0) != pid) { } } 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 void __attribute__((noinline)) remove_dir(const char* dir) { DIR* dp = opendir(dir); if (dp == NULL) { if (errno == EACCES) { if (rmdir(dir)) exit(1); return; } exit(1); } struct dirent* ep = 0; while ((ep = readdir(dp))) { if (strcmp(ep->d_name, ".") == 0 || strcmp(ep->d_name, "..") == 0) continue; char filename[FILENAME_MAX]; snprintf(filename, sizeof(filename), "%s/%s", dir, ep->d_name); struct stat st; if (lstat(filename, &st)) exit(1); if (S_ISDIR(st.st_mode)) { remove_dir(filename); continue; } if (unlink(filename)) exit(1); } closedir(dp); if (rmdir(dir)) exit(1); } 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 __syscall syscall static uintptr_t syz_open_pts(void) { int master, slave; if (openpty(&master, &slave, NULL, NULL, NULL) == -1) return -1; if (dup2(master, master + 100) != -1) close(master); return slave; } 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 < 14; 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); 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); #define WAIT_FLAGS 0 static void loop(void) { int iter = 0; for (;; iter++) { char cwdbuf[32]; sprintf(cwdbuf, "./%d", iter); if (mkdir(cwdbuf, 0777)) exit(1); int pid = fork(); if (pid < 0) exit(1); if (pid == 0) { if (chdir(cwdbuf)) exit(1); execute_one(); exit(0); } int status = 0; uint64_t start = current_time_ms(); for (;;) { if (waitpid(-1, &status, WNOHANG | WAIT_FLAGS) == pid) break; sleep_ms(1); if (current_time_ms() - start < 5000) continue; kill_and_wait(pid, &status); break; } remove_dir(cwdbuf); } } uint64_t r[3] = {0xffffffffffffffff, 0xffffffffffffffff, 0x0}; void execute_call(int call) { intptr_t res = 0; switch (call) { case 0: *(uint32_t*)0x20000000 = 0; res = syscall(SYS_accept, -1, 0ul, 0x20000000ul); if (res != -1) r[0] = res; break; case 1: *(uint16_t*)0x20000040 = 0; *(uint8_t*)0x20000042 = 0; *(uint32_t*)0x20000044 = 0x4e22; syscall(SYS_bind, r[0], 0x20000040ul, 8ul); break; case 2: memcpy((void*)0x20000080, "./file0\000", 8); syscall(SYS_fchownat, -1, 0x20000080ul, 0, -1, 2ul); break; case 3: memcpy((void*)0x200000c0, "/dev/bpf\000", 9); res = syscall(SYS_openat, 0xffffffffffffff9cul, 0x200000c0ul, 0x800ul, 0ul); if (res != -1) r[1] = res; break; case 4: syscall(SYS_ioctl, r[1], 0x20004268ul, 0); break; case 5: *(uint32_t*)0x20000100 = 0xfff; memcpy((void*)0x20000104, "./file0\000\000\000\000\000\000\000\000\000", 16); memcpy((void*)0x20000114, "./file0\000\000\000\000\000\000\000\000\000", 16); syscall(SYS_ioctl, -1, 0xc0245755ul, 0x20000100ul); break; case 6: memcpy((void*)0x20000140, "./file0\000", 8); syscall(SYS_readlink, 0x20000140ul, 0x20000180ul, 0x4bul); break; case 7: *(uint32_t*)0x20000200 = 0x100; memcpy((void*)0x20000204, "./file0\000\000\000\000\000\000\000\000\000", 16); memcpy((void*)0x20000214, "./file0\000\000\000\000\000\000\000\000\000", 16); syscall(SYS_ioctl, -1, 0xc0245755ul, 0x20000200ul); break; case 8: res = syscall(SYS_getgid); if (res != -1) r[2] = res; break; case 9: *(uint32_t*)0x20000240 = r[2]; *(uint32_t*)0x20000244 = 0; *(uint32_t*)0x20000248 = -1; *(uint32_t*)0x2000024c = 0; *(uint32_t*)0x20000250 = 0; *(uint32_t*)0x20000254 = 0; syscall(SYS_setgroups, 6ul, 0x20000240ul); break; case 10: *(uint8_t*)0x20000000 = 0xaa; *(uint8_t*)0x20000001 = 0xaa; *(uint8_t*)0x20000002 = 0xaa; *(uint8_t*)0x20000003 = 0xaa; *(uint8_t*)0x20000004 = 0xaa; *(uint8_t*)0x20000005 = 0xaa; memcpy((void*)0x20000006, "\x45\xef\x64\x58\x67\x44", 6); *(uint16_t*)0x2000000c = htobe16(0x9e0); memcpy((void*)0x2000000e, "\x44\x16\x25\x79\x84\x06\xe6\x9a\xbe\x1b\x79\xbf\x2e\xd6\x35\xc5\xe5\xeb\xe1\x1d\xd0\x48\xc4\xd0\x4e\xc7\xd9\x1f\x74\xda\xe4\x84\x94\x2c\xb6\xbb\xbb\x2c\xca\x8d\xc1\xbd\xdf\xb1\x12\xe6\x79\xc3\x03\x01\x0e\xc3\x6e\xf4\xaa\x42\xa6\xa5\xe5\xf1\x09\x0b\x2d\x04\xb6\x02\x6b\x47\x1c\xbf\x45\x0d\x2f\x7b\xff\x65\xf4\x4e\xe4\x3a\xeb\x89\xa0\xf0\x9e\x0d\xc7\x8d\x4e\xb2\x3d\x9a\xbb\x05\x48\xa8\x57\x79\xa9\xd4\xdc\xc0\x45\x3f\x5c\x05\xc5\x08\x7c\xc7\xa5\x67\x11\x12\xf1\xd3\x2e\xe3\xfa\x5b\xdc\xe0\x41\x72\x76\x6f\x5b\x18\x23\x96\x5b\xde\xac\xa8\x24\xd3\xed\x0f\x0d\x4d\x4d\xbd\x57\x52\xff\x05\x41\x9d\xc1\xd3\x81\xfa\x8c\xdd\xa9\x56\x98\x94\xdd\x2a\x35\x6d\xc8\xb6\x16\x4c\xd8\x68\x39\xa9\x68\xce\xfb\x39\xb6\x87\x7e\x95\x9f\xf6\x27\x28\x02", 183); break; case 11: memcpy((void*)0x20000100, "\xc4\xa1\x99\x72\xd4\x29\x66\x43\x0f\xe7\x0b\x36\x43\xd9\x41\x50\x66\xf3\x43\x0f\x12\x0c\x48\xc4\x83\xfd\x00\xdc\x00\x0f\x38\xf9\x43\xac\xf2\xa4\x66\x45\x81\xc1\xd1\xbf\x41\x79\x2b\xc4\x03\xad\x7c\x62\x00\x74", 52); syz_execute_func(0x20000100); break; case 12: break; case 13: syz_open_pts(); break; } } int main(void) { syscall(SYS_mmap, 0x20000000ul, 0x1000000ul, 3ul, 0x1012ul, -1, 0ul, 0ul); use_temporary_dir(); loop(); return 0; } :275:4: error: misleading indentation; statement is not part of the previous 'if' [-Werror,-Wmisleading-indentation] kill_and_wait(pid, &status); ^ :273:3: note: previous statement is here if (current_time_ms() - start < 5000) ^ 1 error generated. compiler invocation: c++ [-o /tmp/syz-executor146553661 -DGOOS_openbsd=1 -DGOARCH_amd64=1 -DHOSTGOOS_openbsd=1 -x c - -m64 -static -lutil -O2 -pthread -Wall -Werror -Wparentheses -Wunused-const-variable -Wframe-larger-than=16384] --- FAIL: TestGenerate/openbsd/amd64/12 (3.41s) csource_test.go:124: opts: {Threaded:true Collide:false Repeat:true RepeatTimes:0 Procs:0 Slowdown:1 Sandbox:none Fault:false FaultCall:0 FaultNth:0 Leak:false NetInjection:false NetDevices:false NetReset:false Cgroups:false BinfmtMisc:false CloseFDs:false KCSAN:false DevlinkPCI:false USB:false VhciInjection:false Wifi:false Sysctl:false UseTmpDir:true HandleSegv:true Repro:false Trace:false} program: r0 = accept$unix(0xffffffffffffffff, 0x0, &(0x7f0000000000)) bind$unix(r0, &(0x7f0000000040)=@abs={0x0, 0x0, 0x2}, 0x8) fchownat(0xffffffffffffffff, &(0x7f0000000080)='./file0\x00', 0x0, 0xffffffffffffffff, 0x2) r1 = openat$bpf(0xffffffffffffff9c, &(0x7f00000000c0)='/dev/bpf\x00', 0x800, 0x0) ioctl$BIOCFLUSH(r1, 0x20004268) ioctl$WSDISPLAYIO_GETSCREEN(0xffffffffffffffff, 0xc0245755, &(0x7f0000000100)={0xfff, './file0\x00', './file0\x00'}) readlink(&(0x7f0000000140)='./file0\x00', &(0x7f0000000180)=""/75, 0x4b) ioctl$WSDISPLAYIO_GETSCREEN(0xffffffffffffffff, 0xc0245755, &(0x7f0000000200)={0x100, './file0\x00', './file0\x00'}) r2 = getgid() setgroups(0x6, &(0x7f0000000240)=[r2, 0x0, 0xffffffffffffffff, 0x0, 0x0, 0x0]) syz_emit_ethernet(0xc5, &(0x7f0000000000)={@local, @random="45ef64586744", [], {@generic={0x9e0, "441625798406e69abe1b79bf2ed635c5e5ebe11dd048c4d04ec7d91f74dae484942cb6bbbb2cca8dc1bddfb112e679c303010ec36ef4aa42a6a5e5f1090b2d04b6026b471cbf450d2f7bff65f44ee43aeb89a0f09e0dc78d4eb23d9abb0548a85779a9d4dcc0453f5c05c5087cc7a5671112f1d32ee3fa5bdce04172766f5b1823965bdeaca824d3ed0f0d4d4dbd5752ff05419dc1d381fa8cdda9569894dd2a356dc8b6164cd86839a968cefb39b6877e959ff6272802"}}}) syz_execute_func(&(0x7f0000000100)="c4a19972d42966430fe70b3643d9415066f3430f120c48c483fd00dc000f38f943acf2a4664581c1d1bf41792bc403ad7c620074") syz_extract_tcp_res(&(0x7f0000000140), 0x2, 0xffffff43) syz_open_pts() csource_test.go:125: 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 #include #include #include #include #include #include #include #include #include #include static __thread int skip_segv; static __thread jmp_buf segv_env; static void segv_handler(int sig, siginfo_t* info, void* ctx) { uintptr_t addr = (uintptr_t)info->si_addr; const uintptr_t prog_start = 1 << 20; const uintptr_t prog_end = 100 << 20; int skip = __atomic_load_n(&skip_segv, __ATOMIC_RELAXED) != 0; int valid = addr < prog_start || addr > prog_end; if (skip && valid) { _longjmp(segv_env, 1); } exit(sig); } static void install_segv_handler(void) { struct sigaction sa; memset(&sa, 0, sizeof(sa)); sa.sa_sigaction = segv_handler; sa.sa_flags = SA_NODEFER | SA_SIGINFO; sigaction(SIGSEGV, &sa, NULL); sigaction(SIGBUS, &sa, NULL); } #define NONFAILING(...) ({ int ok = 1; __atomic_fetch_add(&skip_segv, 1, __ATOMIC_SEQ_CST); if (_setjmp(segv_env) == 0) { __VA_ARGS__; } else ok = 0; __atomic_fetch_sub(&skip_segv, 1, __ATOMIC_SEQ_CST); ok; }) static void kill_and_wait(int pid, int* status) { kill(pid, SIGKILL); while (waitpid(-1, status, 0) != pid) { } } 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 void __attribute__((noinline)) remove_dir(const char* dir) { DIR* dp = opendir(dir); if (dp == NULL) { if (errno == EACCES) { if (rmdir(dir)) exit(1); return; } exit(1); } struct dirent* ep = 0; while ((ep = readdir(dp))) { if (strcmp(ep->d_name, ".") == 0 || strcmp(ep->d_name, "..") == 0) continue; char filename[FILENAME_MAX]; snprintf(filename, sizeof(filename), "%s/%s", dir, ep->d_name); struct stat st; if (lstat(filename, &st)) exit(1); if (S_ISDIR(st.st_mode)) { remove_dir(filename); continue; } if (unlink(filename)) exit(1); } closedir(dp); if (rmdir(dir)) exit(1); } 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 __syscall syscall static uintptr_t syz_open_pts(void) { int master, slave; if (openpty(&master, &slave, NULL, NULL, NULL) == -1) return -1; if (dup2(master, master + 100) != -1) close(master); return slave; } static void sandbox_common() { struct rlimit rlim; rlim.rlim_cur = rlim.rlim_max = 8 << 20; setrlimit(RLIMIT_MEMLOCK, &rlim); rlim.rlim_cur = rlim.rlim_max = 1 << 20; setrlimit(RLIMIT_FSIZE, &rlim); rlim.rlim_cur = rlim.rlim_max = 1 << 20; setrlimit(RLIMIT_STACK, &rlim); rlim.rlim_cur = rlim.rlim_max = 0; setrlimit(RLIMIT_CORE, &rlim); rlim.rlim_cur = rlim.rlim_max = 256; setrlimit(RLIMIT_NOFILE, &rlim); } static void loop(); static int do_sandbox_none(void) { sandbox_common(); loop(); 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 < 14; 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); 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); #define WAIT_FLAGS 0 static void loop(void) { int iter = 0; for (;; iter++) { char cwdbuf[32]; sprintf(cwdbuf, "./%d", iter); if (mkdir(cwdbuf, 0777)) exit(1); int pid = fork(); if (pid < 0) exit(1); if (pid == 0) { if (chdir(cwdbuf)) exit(1); execute_one(); exit(0); } int status = 0; uint64_t start = current_time_ms(); for (;;) { if (waitpid(-1, &status, WNOHANG | WAIT_FLAGS) == pid) break; sleep_ms(1); if (current_time_ms() - start < 5000) continue; kill_and_wait(pid, &status); break; } remove_dir(cwdbuf); } } uint64_t r[3] = {0xffffffffffffffff, 0xffffffffffffffff, 0x0}; void execute_call(int call) { intptr_t res = 0; switch (call) { case 0: NONFAILING(*(uint32_t*)0x20000000 = 0); res = syscall(SYS_accept, -1, 0ul, 0x20000000ul); if (res != -1) r[0] = res; break; case 1: NONFAILING(*(uint16_t*)0x20000040 = 0); NONFAILING(*(uint8_t*)0x20000042 = 0); NONFAILING(*(uint32_t*)0x20000044 = 0x4e22); syscall(SYS_bind, r[0], 0x20000040ul, 8ul); break; case 2: NONFAILING(memcpy((void*)0x20000080, "./file0\000", 8)); syscall(SYS_fchownat, -1, 0x20000080ul, 0, -1, 2ul); break; case 3: NONFAILING(memcpy((void*)0x200000c0, "/dev/bpf\000", 9)); res = syscall(SYS_openat, 0xffffffffffffff9cul, 0x200000c0ul, 0x800ul, 0ul); if (res != -1) r[1] = res; break; case 4: syscall(SYS_ioctl, r[1], 0x20004268ul, 0); break; case 5: NONFAILING(*(uint32_t*)0x20000100 = 0xfff); NONFAILING(memcpy((void*)0x20000104, "./file0\000\000\000\000\000\000\000\000\000", 16)); NONFAILING(memcpy((void*)0x20000114, "./file0\000\000\000\000\000\000\000\000\000", 16)); syscall(SYS_ioctl, -1, 0xc0245755ul, 0x20000100ul); break; case 6: NONFAILING(memcpy((void*)0x20000140, "./file0\000", 8)); syscall(SYS_readlink, 0x20000140ul, 0x20000180ul, 0x4bul); break; case 7: NONFAILING(*(uint32_t*)0x20000200 = 0x100); NONFAILING(memcpy((void*)0x20000204, "./file0\000\000\000\000\000\000\000\000\000", 16)); NONFAILING(memcpy((void*)0x20000214, "./file0\000\000\000\000\000\000\000\000\000", 16)); syscall(SYS_ioctl, -1, 0xc0245755ul, 0x20000200ul); break; case 8: res = syscall(SYS_getgid); if (res != -1) r[2] = res; break; case 9: NONFAILING(*(uint32_t*)0x20000240 = r[2]); NONFAILING(*(uint32_t*)0x20000244 = 0); NONFAILING(*(uint32_t*)0x20000248 = -1); NONFAILING(*(uint32_t*)0x2000024c = 0); NONFAILING(*(uint32_t*)0x20000250 = 0); NONFAILING(*(uint32_t*)0x20000254 = 0); syscall(SYS_setgroups, 6ul, 0x20000240ul); break; case 10: NONFAILING(*(uint8_t*)0x20000000 = 0xaa); NONFAILING(*(uint8_t*)0x20000001 = 0xaa); NONFAILING(*(uint8_t*)0x20000002 = 0xaa); NONFAILING(*(uint8_t*)0x20000003 = 0xaa); NONFAILING(*(uint8_t*)0x20000004 = 0xaa); NONFAILING(*(uint8_t*)0x20000005 = 0xaa); NONFAILING(memcpy((void*)0x20000006, "\x45\xef\x64\x58\x67\x44", 6)); NONFAILING(*(uint16_t*)0x2000000c = htobe16(0x9e0)); NONFAILING(memcpy((void*)0x2000000e, "\x44\x16\x25\x79\x84\x06\xe6\x9a\xbe\x1b\x79\xbf\x2e\xd6\x35\xc5\xe5\xeb\xe1\x1d\xd0\x48\xc4\xd0\x4e\xc7\xd9\x1f\x74\xda\xe4\x84\x94\x2c\xb6\xbb\xbb\x2c\xca\x8d\xc1\xbd\xdf\xb1\x12\xe6\x79\xc3\x03\x01\x0e\xc3\x6e\xf4\xaa\x42\xa6\xa5\xe5\xf1\x09\x0b\x2d\x04\xb6\x02\x6b\x47\x1c\xbf\x45\x0d\x2f\x7b\xff\x65\xf4\x4e\xe4\x3a\xeb\x89\xa0\xf0\x9e\x0d\xc7\x8d\x4e\xb2\x3d\x9a\xbb\x05\x48\xa8\x57\x79\xa9\xd4\xdc\xc0\x45\x3f\x5c\x05\xc5\x08\x7c\xc7\xa5\x67\x11\x12\xf1\xd3\x2e\xe3\xfa\x5b\xdc\xe0\x41\x72\x76\x6f\x5b\x18\x23\x96\x5b\xde\xac\xa8\x24\xd3\xed\x0f\x0d\x4d\x4d\xbd\x57\x52\xff\x05\x41\x9d\xc1\xd3\x81\xfa\x8c\xdd\xa9\x56\x98\x94\xdd\x2a\x35\x6d\xc8\xb6\x16\x4c\xd8\x68\x39\xa9\x68\xce\xfb\x39\xb6\x87\x7e\x95\x9f\xf6\x27\x28\x02", 183)); break; case 11: NONFAILING(memcpy((void*)0x20000100, "\xc4\xa1\x99\x72\xd4\x29\x66\x43\x0f\xe7\x0b\x36\x43\xd9\x41\x50\x66\xf3\x43\x0f\x12\x0c\x48\xc4\x83\xfd\x00\xdc\x00\x0f\x38\xf9\x43\xac\xf2\xa4\x66\x45\x81\xc1\xd1\xbf\x41\x79\x2b\xc4\x03\xad\x7c\x62\x00\x74", 52)); NONFAILING(syz_execute_func(0x20000100)); break; case 12: break; case 13: NONFAILING(syz_open_pts()); break; } } int main(void) { syscall(SYS_mmap, 0x20000000ul, 0x1000000ul, 3ul, 0x1012ul, -1, 0ul, 0ul); install_segv_handler(); use_temporary_dir(); do_sandbox_none(); return 0; } :329:4: error: misleading indentation; statement is not part of the previous 'if' [-Werror,-Wmisleading-indentation] kill_and_wait(pid, &status); ^ :327:3: note: previous statement is here if (current_time_ms() - start < 5000) ^ 1 error generated. compiler invocation: c++ [-o /tmp/syz-executor228377025 -DGOOS_openbsd=1 -DGOARCH_amd64=1 -DHOSTGOOS_openbsd=1 -x c - -m64 -static -lutil -O2 -pthread -Wall -Werror -Wparentheses -Wunused-const-variable -Wframe-larger-than=16384] --- FAIL: TestGenerate/openbsd/amd64/9 (3.48s) csource_test.go:124: opts: {Threaded:true Collide:false Repeat:true RepeatTimes:0 Procs:0 Slowdown:1 Sandbox:setuid Fault:false FaultCall:0 FaultNth:0 Leak:false NetInjection:false NetDevices:false NetReset:false Cgroups:false BinfmtMisc:false CloseFDs:false KCSAN:false DevlinkPCI:false USB:false VhciInjection:false Wifi:false Sysctl:false UseTmpDir:true HandleSegv:false Repro:false Trace:false} program: r0 = accept$unix(0xffffffffffffffff, 0x0, &(0x7f0000000000)) bind$unix(r0, &(0x7f0000000040)=@abs={0x0, 0x0, 0x2}, 0x8) fchownat(0xffffffffffffffff, &(0x7f0000000080)='./file0\x00', 0x0, 0xffffffffffffffff, 0x2) r1 = openat$bpf(0xffffffffffffff9c, &(0x7f00000000c0)='/dev/bpf\x00', 0x800, 0x0) ioctl$BIOCFLUSH(r1, 0x20004268) ioctl$WSDISPLAYIO_GETSCREEN(0xffffffffffffffff, 0xc0245755, &(0x7f0000000100)={0xfff, './file0\x00', './file0\x00'}) readlink(&(0x7f0000000140)='./file0\x00', &(0x7f0000000180)=""/75, 0x4b) ioctl$WSDISPLAYIO_GETSCREEN(0xffffffffffffffff, 0xc0245755, &(0x7f0000000200)={0x100, './file0\x00', './file0\x00'}) r2 = getgid() setgroups(0x6, &(0x7f0000000240)=[r2, 0x0, 0xffffffffffffffff, 0x0, 0x0, 0x0]) syz_emit_ethernet(0xc5, &(0x7f0000000000)={@local, @random="45ef64586744", [], {@generic={0x9e0, "441625798406e69abe1b79bf2ed635c5e5ebe11dd048c4d04ec7d91f74dae484942cb6bbbb2cca8dc1bddfb112e679c303010ec36ef4aa42a6a5e5f1090b2d04b6026b471cbf450d2f7bff65f44ee43aeb89a0f09e0dc78d4eb23d9abb0548a85779a9d4dcc0453f5c05c5087cc7a5671112f1d32ee3fa5bdce04172766f5b1823965bdeaca824d3ed0f0d4d4dbd5752ff05419dc1d381fa8cdda9569894dd2a356dc8b6164cd86839a968cefb39b6877e959ff6272802"}}}) syz_execute_func(&(0x7f0000000100)="c4a19972d42966430fe70b3643d9415066f3430f120c48c483fd00dc000f38f943acf2a4664581c1d1bf41792bc403ad7c620074") syz_extract_tcp_res(&(0x7f0000000140), 0x2, 0xffffff43) syz_open_pts() csource_test.go:125: 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 #include #include #include #include #include #include #include #include #include static void kill_and_wait(int pid, int* status) { kill(pid, SIGKILL); while (waitpid(-1, status, 0) != pid) { } } 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 void __attribute__((noinline)) remove_dir(const char* dir) { DIR* dp = opendir(dir); if (dp == NULL) { if (errno == EACCES) { if (rmdir(dir)) exit(1); return; } exit(1); } struct dirent* ep = 0; while ((ep = readdir(dp))) { if (strcmp(ep->d_name, ".") == 0 || strcmp(ep->d_name, "..") == 0) continue; char filename[FILENAME_MAX]; snprintf(filename, sizeof(filename), "%s/%s", dir, ep->d_name); struct stat st; if (lstat(filename, &st)) exit(1); if (S_ISDIR(st.st_mode)) { remove_dir(filename); continue; } if (unlink(filename)) exit(1); } closedir(dp); if (rmdir(dir)) exit(1); } 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 __syscall syscall static uintptr_t syz_open_pts(void) { int master, slave; if (openpty(&master, &slave, NULL, NULL, NULL) == -1) return -1; if (dup2(master, master + 100) != -1) close(master); return slave; } static void sandbox_common() { struct rlimit rlim; rlim.rlim_cur = rlim.rlim_max = 8 << 20; setrlimit(RLIMIT_MEMLOCK, &rlim); rlim.rlim_cur = rlim.rlim_max = 1 << 20; setrlimit(RLIMIT_FSIZE, &rlim); rlim.rlim_cur = rlim.rlim_max = 1 << 20; setrlimit(RLIMIT_STACK, &rlim); rlim.rlim_cur = rlim.rlim_max = 0; setrlimit(RLIMIT_CORE, &rlim); rlim.rlim_cur = rlim.rlim_max = 256; setrlimit(RLIMIT_NOFILE, &rlim); } static void loop(); static int wait_for_loop(int pid) { if (pid < 0) exit(1); int status = 0; while (waitpid(-1, &status, WUNTRACED) != pid) { } return WEXITSTATUS(status); } static int do_sandbox_setuid(void) { int pid = fork(); if (pid != 0) return wait_for_loop(pid); sandbox_common(); char pwbuf[1024]; struct passwd *pw, pwres; if (getpwnam_r("nobody", &pwres, pwbuf, sizeof(pwbuf), &pw) != 0 || !pw) exit(1); if (setgroups(0, NULL)) exit(1); if (setgid(pw->pw_gid)) exit(1); if (setuid(pw->pw_uid)) exit(1); loop(); exit(1); } 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 < 14; 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); 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); #define WAIT_FLAGS 0 static void loop(void) { int iter = 0; for (;; iter++) { char cwdbuf[32]; sprintf(cwdbuf, "./%d", iter); if (mkdir(cwdbuf, 0777)) exit(1); int pid = fork(); if (pid < 0) exit(1); if (pid == 0) { if (chdir(cwdbuf)) exit(1); execute_one(); exit(0); } int status = 0; uint64_t start = current_time_ms(); for (;;) { if (waitpid(-1, &status, WNOHANG | WAIT_FLAGS) == pid) break; sleep_ms(1); if (current_time_ms() - start < 5000) continue; kill_and_wait(pid, &status); break; } remove_dir(cwdbuf); } } uint64_t r[3] = {0xffffffffffffffff, 0xffffffffffffffff, 0x0}; void execute_call(int call) { intptr_t res = 0; switch (call) { case 0: *(uint32_t*)0x20000000 = 0; res = syscall(SYS_accept, -1, 0ul, 0x20000000ul); if (res != -1) r[0] = res; break; case 1: *(uint16_t*)0x20000040 = 0; *(uint8_t*)0x20000042 = 0; *(uint32_t*)0x20000044 = 0x4e22; syscall(SYS_bind, r[0], 0x20000040ul, 8ul); break; case 2: memcpy((void*)0x20000080, "./file0\000", 8); syscall(SYS_fchownat, -1, 0x20000080ul, 0, -1, 2ul); break; case 3: memcpy((void*)0x200000c0, "/dev/bpf\000", 9); res = syscall(SYS_openat, 0xffffffffffffff9cul, 0x200000c0ul, 0x800ul, 0ul); if (res != -1) r[1] = res; break; case 4: syscall(SYS_ioctl, r[1], 0x20004268ul, 0); break; case 5: *(uint32_t*)0x20000100 = 0xfff; memcpy((void*)0x20000104, "./file0\000\000\000\000\000\000\000\000\000", 16); memcpy((void*)0x20000114, "./file0\000\000\000\000\000\000\000\000\000", 16); syscall(SYS_ioctl, -1, 0xc0245755ul, 0x20000100ul); break; case 6: memcpy((void*)0x20000140, "./file0\000", 8); syscall(SYS_readlink, 0x20000140ul, 0x20000180ul, 0x4bul); break; case 7: *(uint32_t*)0x20000200 = 0x100; memcpy((void*)0x20000204, "./file0\000\000\000\000\000\000\000\000\000", 16); memcpy((void*)0x20000214, "./file0\000\000\000\000\000\000\000\000\000", 16); syscall(SYS_ioctl, -1, 0xc0245755ul, 0x20000200ul); break; case 8: res = syscall(SYS_getgid); if (res != -1) r[2] = res; break; case 9: *(uint32_t*)0x20000240 = r[2]; *(uint32_t*)0x20000244 = 0; *(uint32_t*)0x20000248 = -1; *(uint32_t*)0x2000024c = 0; *(uint32_t*)0x20000250 = 0; *(uint32_t*)0x20000254 = 0; syscall(SYS_setgroups, 6ul, 0x20000240ul); break; case 10: *(uint8_t*)0x20000000 = 0xaa; *(uint8_t*)0x20000001 = 0xaa; *(uint8_t*)0x20000002 = 0xaa; *(uint8_t*)0x20000003 = 0xaa; *(uint8_t*)0x20000004 = 0xaa; *(uint8_t*)0x20000005 = 0xaa; memcpy((void*)0x20000006, "\x45\xef\x64\x58\x67\x44", 6); *(uint16_t*)0x2000000c = htobe16(0x9e0); memcpy((void*)0x2000000e, "\x44\x16\x25\x79\x84\x06\xe6\x9a\xbe\x1b\x79\xbf\x2e\xd6\x35\xc5\xe5\xeb\xe1\x1d\xd0\x48\xc4\xd0\x4e\xc7\xd9\x1f\x74\xda\xe4\x84\x94\x2c\xb6\xbb\xbb\x2c\xca\x8d\xc1\xbd\xdf\xb1\x12\xe6\x79\xc3\x03\x01\x0e\xc3\x6e\xf4\xaa\x42\xa6\xa5\xe5\xf1\x09\x0b\x2d\x04\xb6\x02\x6b\x47\x1c\xbf\x45\x0d\x2f\x7b\xff\x65\xf4\x4e\xe4\x3a\xeb\x89\xa0\xf0\x9e\x0d\xc7\x8d\x4e\xb2\x3d\x9a\xbb\x05\x48\xa8\x57\x79\xa9\xd4\xdc\xc0\x45\x3f\x5c\x05\xc5\x08\x7c\xc7\xa5\x67\x11\x12\xf1\xd3\x2e\xe3\xfa\x5b\xdc\xe0\x41\x72\x76\x6f\x5b\x18\x23\x96\x5b\xde\xac\xa8\x24\xd3\xed\x0f\x0d\x4d\x4d\xbd\x57\x52\xff\x05\x41\x9d\xc1\xd3\x81\xfa\x8c\xdd\xa9\x56\x98\x94\xdd\x2a\x35\x6d\xc8\xb6\x16\x4c\xd8\x68\x39\xa9\x68\xce\xfb\x39\xb6\x87\x7e\x95\x9f\xf6\x27\x28\x02", 183); break; case 11: memcpy((void*)0x20000100, "\xc4\xa1\x99\x72\xd4\x29\x66\x43\x0f\xe7\x0b\x36\x43\xd9\x41\x50\x66\xf3\x43\x0f\x12\x0c\x48\xc4\x83\xfd\x00\xdc\x00\x0f\x38\xf9\x43\xac\xf2\xa4\x66\x45\x81\xc1\xd1\xbf\x41\x79\x2b\xc4\x03\xad\x7c\x62\x00\x74", 52); syz_execute_func(0x20000100); break; case 12: break; case 13: syz_open_pts(); break; } } int main(void) { syscall(SYS_mmap, 0x20000000ul, 0x1000000ul, 3ul, 0x1012ul, -1, 0ul, 0ul); use_temporary_dir(); do_sandbox_setuid(); return 0; } :323:4: error: misleading indentation; statement is not part of the previous 'if' [-Werror,-Wmisleading-indentation] kill_and_wait(pid, &status); ^ :321:3: note: previous statement is here if (current_time_ms() - start < 5000) ^ 1 error generated. compiler invocation: c++ [-o /tmp/syz-executor788434331 -DGOOS_openbsd=1 -DGOARCH_amd64=1 -DHOSTGOOS_openbsd=1 -x c - -m64 -static -lutil -O2 -pthread -Wall -Werror -Wparentheses -Wunused-const-variable -Wframe-larger-than=16384] --- FAIL: TestGenerate/openbsd/amd64/15 (4.26s) csource_test.go:124: opts: {Threaded:true Collide:true Repeat:true RepeatTimes:0 Procs:2 Slowdown:1 Sandbox:none Fault:false FaultCall:0 FaultNth:0 Leak:false NetInjection:false NetDevices:false NetReset:false Cgroups:false BinfmtMisc:false CloseFDs:false KCSAN:false DevlinkPCI:false USB:false VhciInjection:false Wifi:false Sysctl:false UseTmpDir:true HandleSegv:false Repro:true Trace:false} program: r0 = accept$unix(0xffffffffffffffff, 0x0, &(0x7f0000000000)) bind$unix(r0, &(0x7f0000000040)=@abs={0x0, 0x0, 0x2}, 0x8) fchownat(0xffffffffffffffff, &(0x7f0000000080)='./file0\x00', 0x0, 0xffffffffffffffff, 0x2) r1 = openat$bpf(0xffffffffffffff9c, &(0x7f00000000c0)='/dev/bpf\x00', 0x800, 0x0) ioctl$BIOCFLUSH(r1, 0x20004268) ioctl$WSDISPLAYIO_GETSCREEN(0xffffffffffffffff, 0xc0245755, &(0x7f0000000100)={0xfff, './file0\x00', './file0\x00'}) readlink(&(0x7f0000000140)='./file0\x00', &(0x7f0000000180)=""/75, 0x4b) ioctl$WSDISPLAYIO_GETSCREEN(0xffffffffffffffff, 0xc0245755, &(0x7f0000000200)={0x100, './file0\x00', './file0\x00'}) r2 = getgid() setgroups(0x6, &(0x7f0000000240)=[r2, 0x0, 0xffffffffffffffff, 0x0, 0x0, 0x0]) syz_emit_ethernet(0xc5, &(0x7f0000000000)={@local, @random="45ef64586744", [], {@generic={0x9e0, "441625798406e69abe1b79bf2ed635c5e5ebe11dd048c4d04ec7d91f74dae484942cb6bbbb2cca8dc1bddfb112e679c303010ec36ef4aa42a6a5e5f1090b2d04b6026b471cbf450d2f7bff65f44ee43aeb89a0f09e0dc78d4eb23d9abb0548a85779a9d4dcc0453f5c05c5087cc7a5671112f1d32ee3fa5bdce04172766f5b1823965bdeaca824d3ed0f0d4d4dbd5752ff05419dc1d381fa8cdda9569894dd2a356dc8b6164cd86839a968cefb39b6877e959ff6272802"}}}) syz_execute_func(&(0x7f0000000100)="c4a19972d42966430fe70b3643d9415066f3430f120c48c483fd00dc000f38f943acf2a4664581c1d1bf41792bc403ad7c620074") syz_extract_tcp_res(&(0x7f0000000140), 0x2, 0xffffff43) syz_open_pts() csource_test.go:125: 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 #include #include #include #include #include #include #include #include #include static unsigned long long procid; static void kill_and_wait(int pid, int* status) { kill(pid, SIGKILL); while (waitpid(-1, status, 0) != pid) { } } 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 void __attribute__((noinline)) remove_dir(const char* dir) { DIR* dp = opendir(dir); if (dp == NULL) { if (errno == EACCES) { if (rmdir(dir)) exit(1); return; } exit(1); } struct dirent* ep = 0; while ((ep = readdir(dp))) { if (strcmp(ep->d_name, ".") == 0 || strcmp(ep->d_name, "..") == 0) continue; char filename[FILENAME_MAX]; snprintf(filename, sizeof(filename), "%s/%s", dir, ep->d_name); struct stat st; if (lstat(filename, &st)) exit(1); if (S_ISDIR(st.st_mode)) { remove_dir(filename); continue; } if (unlink(filename)) exit(1); } closedir(dp); if (rmdir(dir)) exit(1); } 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 __syscall syscall static uintptr_t syz_open_pts(void) { int master, slave; if (openpty(&master, &slave, NULL, NULL, NULL) == -1) return -1; if (dup2(master, master + 100) != -1) close(master); return slave; } static void sandbox_common() { struct rlimit rlim; rlim.rlim_cur = rlim.rlim_max = 8 << 20; setrlimit(RLIMIT_MEMLOCK, &rlim); rlim.rlim_cur = rlim.rlim_max = 1 << 20; setrlimit(RLIMIT_FSIZE, &rlim); rlim.rlim_cur = rlim.rlim_max = 1 << 20; setrlimit(RLIMIT_STACK, &rlim); rlim.rlim_cur = rlim.rlim_max = 0; setrlimit(RLIMIT_CORE, &rlim); rlim.rlim_cur = rlim.rlim_max = 256; setrlimit(RLIMIT_NOFILE, &rlim); } static void loop(); static int do_sandbox_none(void) { sandbox_common(); loop(); 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; int collide = 0; again: for (call = 0; call < 14; 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 (collide && (call % 2) == 0) break; event_timedwait(&th->done, 50); break; } } for (i = 0; i < 100 && __atomic_load_n(&running, __ATOMIC_RELAXED); i++) sleep_ms(1); if (!collide) { collide = 1; goto again; } } static void execute_one(void); #define WAIT_FLAGS 0 static void loop(void) { int iter = 0; for (;; iter++) { char cwdbuf[32]; sprintf(cwdbuf, "./%d", iter); if (mkdir(cwdbuf, 0777)) exit(1); int pid = fork(); if (pid < 0) exit(1); if (pid == 0) { if (chdir(cwdbuf)) exit(1); execute_one(); exit(0); } int status = 0; uint64_t start = current_time_ms(); for (;;) { if (waitpid(-1, &status, WNOHANG | WAIT_FLAGS) == pid) break; sleep_ms(1); if (current_time_ms() - start < 5000) continue; kill_and_wait(pid, &status); break; } remove_dir(cwdbuf); } } uint64_t r[3] = {0xffffffffffffffff, 0xffffffffffffffff, 0x0}; void execute_call(int call) { intptr_t res = 0; switch (call) { case 0: *(uint32_t*)0x20000000 = 0; res = syscall(SYS_accept, -1, 0ul, 0x20000000ul); if (res != -1) r[0] = res; break; case 1: *(uint16_t*)0x20000040 = 0; *(uint8_t*)0x20000042 = 0; *(uint32_t*)0x20000044 = 0x4e22 + procid*4; syscall(SYS_bind, r[0], 0x20000040ul, 8ul); break; case 2: memcpy((void*)0x20000080, "./file0\000", 8); syscall(SYS_fchownat, -1, 0x20000080ul, 0, -1, 2ul); break; case 3: memcpy((void*)0x200000c0, "/dev/bpf\000", 9); res = syscall(SYS_openat, 0xffffffffffffff9cul, 0x200000c0ul, 0x800ul, 0ul); if (res != -1) r[1] = res; break; case 4: syscall(SYS_ioctl, r[1], 0x20004268ul, 0); break; case 5: *(uint32_t*)0x20000100 = 0xfff; memcpy((void*)0x20000104, "./file0\000\000\000\000\000\000\000\000\000", 16); memcpy((void*)0x20000114, "./file0\000\000\000\000\000\000\000\000\000", 16); syscall(SYS_ioctl, -1, 0xc0245755ul, 0x20000100ul); break; case 6: memcpy((void*)0x20000140, "./file0\000", 8); syscall(SYS_readlink, 0x20000140ul, 0x20000180ul, 0x4bul); break; case 7: *(uint32_t*)0x20000200 = 0x100; memcpy((void*)0x20000204, "./file0\000\000\000\000\000\000\000\000\000", 16); memcpy((void*)0x20000214, "./file0\000\000\000\000\000\000\000\000\000", 16); syscall(SYS_ioctl, -1, 0xc0245755ul, 0x20000200ul); break; case 8: res = syscall(SYS_getgid); if (res != -1) r[2] = res; break; case 9: *(uint32_t*)0x20000240 = r[2]; *(uint32_t*)0x20000244 = 0; *(uint32_t*)0x20000248 = -1; *(uint32_t*)0x2000024c = 0; *(uint32_t*)0x20000250 = 0; *(uint32_t*)0x20000254 = 0; syscall(SYS_setgroups, 6ul, 0x20000240ul); break; case 10: *(uint8_t*)0x20000000 = 0xaa; *(uint8_t*)0x20000001 = 0xaa; *(uint8_t*)0x20000002 = 0xaa; *(uint8_t*)0x20000003 = 0xaa; *(uint8_t*)0x20000004 = 0xaa; *(uint8_t*)0x20000005 = 0xaa; memcpy((void*)0x20000006, "\x45\xef\x64\x58\x67\x44", 6); *(uint16_t*)0x2000000c = htobe16(0x9e0); memcpy((void*)0x2000000e, "\x44\x16\x25\x79\x84\x06\xe6\x9a\xbe\x1b\x79\xbf\x2e\xd6\x35\xc5\xe5\xeb\xe1\x1d\xd0\x48\xc4\xd0\x4e\xc7\xd9\x1f\x74\xda\xe4\x84\x94\x2c\xb6\xbb\xbb\x2c\xca\x8d\xc1\xbd\xdf\xb1\x12\xe6\x79\xc3\x03\x01\x0e\xc3\x6e\xf4\xaa\x42\xa6\xa5\xe5\xf1\x09\x0b\x2d\x04\xb6\x02\x6b\x47\x1c\xbf\x45\x0d\x2f\x7b\xff\x65\xf4\x4e\xe4\x3a\xeb\x89\xa0\xf0\x9e\x0d\xc7\x8d\x4e\xb2\x3d\x9a\xbb\x05\x48\xa8\x57\x79\xa9\xd4\xdc\xc0\x45\x3f\x5c\x05\xc5\x08\x7c\xc7\xa5\x67\x11\x12\xf1\xd3\x2e\xe3\xfa\x5b\xdc\xe0\x41\x72\x76\x6f\x5b\x18\x23\x96\x5b\xde\xac\xa8\x24\xd3\xed\x0f\x0d\x4d\x4d\xbd\x57\x52\xff\x05\x41\x9d\xc1\xd3\x81\xfa\x8c\xdd\xa9\x56\x98\x94\xdd\x2a\x35\x6d\xc8\xb6\x16\x4c\xd8\x68\x39\xa9\x68\xce\xfb\x39\xb6\x87\x7e\x95\x9f\xf6\x27\x28\x02", 183); break; case 11: memcpy((void*)0x20000100, "\xc4\xa1\x99\x72\xd4\x29\x66\x43\x0f\xe7\x0b\x36\x43\xd9\x41\x50\x66\xf3\x43\x0f\x12\x0c\x48\xc4\x83\xfd\x00\xdc\x00\x0f\x38\xf9\x43\xac\xf2\xa4\x66\x45\x81\xc1\xd1\xbf\x41\x79\x2b\xc4\x03\xad\x7c\x62\x00\x74", 52); syz_execute_func(0x20000100); break; case 12: break; case 13: syz_open_pts(); break; } } int main(void) { syscall(SYS_mmap, 0x20000000ul, 0x1000000ul, 3ul, 0x1012ul, -1, 0ul, 0ul); for (procid = 0; procid < 2; procid++) { if (fork() == 0) { use_temporary_dir(); do_sandbox_none(); } } sleep(1000000); return 0; } :312:4: error: misleading indentation; statement is not part of the previous 'if' [-Werror,-Wmisleading-indentation] kill_and_wait(pid, &status); ^ :310:3: note: previous statement is here if (current_time_ms() - start < 5000) ^ 1 error generated. compiler invocation: c++ [-o /tmp/syz-executor823469944 -DGOOS_openbsd=1 -DGOARCH_amd64=1 -DHOSTGOOS_openbsd=1 -x c - -m64 -static -lutil -O2 -pthread -Wall -Werror -Wparentheses -Wunused-const-variable -Wframe-larger-than=16384] --- FAIL: TestGenerate/openbsd/amd64/11 (4.03s) csource_test.go:124: opts: {Threaded:true Collide:false Repeat:true RepeatTimes:0 Procs:0 Slowdown:1 Sandbox:none Fault:false FaultCall:0 FaultNth:0 Leak:false NetInjection:false NetDevices:false NetReset:false Cgroups:false BinfmtMisc:false CloseFDs:false KCSAN:false DevlinkPCI:false USB:false VhciInjection:false Wifi:false Sysctl:false UseTmpDir:false HandleSegv:false Repro:false Trace:false} program: r0 = accept$unix(0xffffffffffffffff, 0x0, &(0x7f0000000000)) bind$unix(r0, &(0x7f0000000040)=@abs={0x0, 0x0, 0x2}, 0x8) fchownat(0xffffffffffffffff, &(0x7f0000000080)='./file0\x00', 0x0, 0xffffffffffffffff, 0x2) r1 = openat$bpf(0xffffffffffffff9c, &(0x7f00000000c0)='/dev/bpf\x00', 0x800, 0x0) ioctl$BIOCFLUSH(r1, 0x20004268) ioctl$WSDISPLAYIO_GETSCREEN(0xffffffffffffffff, 0xc0245755, &(0x7f0000000100)={0xfff, './file0\x00', './file0\x00'}) readlink(&(0x7f0000000140)='./file0\x00', &(0x7f0000000180)=""/75, 0x4b) ioctl$WSDISPLAYIO_GETSCREEN(0xffffffffffffffff, 0xc0245755, &(0x7f0000000200)={0x100, './file0\x00', './file0\x00'}) r2 = getgid() setgroups(0x6, &(0x7f0000000240)=[r2, 0x0, 0xffffffffffffffff, 0x0, 0x0, 0x0]) syz_emit_ethernet(0xc5, &(0x7f0000000000)={@local, @random="45ef64586744", [], {@generic={0x9e0, "441625798406e69abe1b79bf2ed635c5e5ebe11dd048c4d04ec7d91f74dae484942cb6bbbb2cca8dc1bddfb112e679c303010ec36ef4aa42a6a5e5f1090b2d04b6026b471cbf450d2f7bff65f44ee43aeb89a0f09e0dc78d4eb23d9abb0548a85779a9d4dcc0453f5c05c5087cc7a5671112f1d32ee3fa5bdce04172766f5b1823965bdeaca824d3ed0f0d4d4dbd5752ff05419dc1d381fa8cdda9569894dd2a356dc8b6164cd86839a968cefb39b6877e959ff6272802"}}}) syz_execute_func(&(0x7f0000000100)="c4a19972d42966430fe70b3643d9415066f3430f120c48c483fd00dc000f38f943acf2a4664581c1d1bf41792bc403ad7c620074") syz_extract_tcp_res(&(0x7f0000000140), 0x2, 0xffffff43) syz_open_pts() csource_test.go:125: 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 #include #include #include #include #include #include #include static void kill_and_wait(int pid, int* status) { kill(pid, SIGKILL); while (waitpid(-1, status, 0) != pid) { } } 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 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 __syscall syscall static uintptr_t syz_open_pts(void) { int master, slave; if (openpty(&master, &slave, NULL, NULL, NULL) == -1) return -1; if (dup2(master, master + 100) != -1) close(master); return slave; } static void sandbox_common() { struct rlimit rlim; rlim.rlim_cur = rlim.rlim_max = 8 << 20; setrlimit(RLIMIT_MEMLOCK, &rlim); rlim.rlim_cur = rlim.rlim_max = 1 << 20; setrlimit(RLIMIT_FSIZE, &rlim); rlim.rlim_cur = rlim.rlim_max = 1 << 20; setrlimit(RLIMIT_STACK, &rlim); rlim.rlim_cur = rlim.rlim_max = 0; setrlimit(RLIMIT_CORE, &rlim); rlim.rlim_cur = rlim.rlim_max = 256; setrlimit(RLIMIT_NOFILE, &rlim); } static void loop(); static int do_sandbox_none(void) { sandbox_common(); loop(); 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 < 14; 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); 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); #define WAIT_FLAGS 0 static void loop(void) { int iter = 0; for (;; iter++) { int pid = fork(); if (pid < 0) exit(1); if (pid == 0) { execute_one(); exit(0); } int status = 0; uint64_t start = current_time_ms(); for (;;) { if (waitpid(-1, &status, WNOHANG | WAIT_FLAGS) == pid) break; sleep_ms(1); if (current_time_ms() - start < 5000) continue; kill_and_wait(pid, &status); break; } } } uint64_t r[3] = {0xffffffffffffffff, 0xffffffffffffffff, 0x0}; void execute_call(int call) { intptr_t res = 0; switch (call) { case 0: *(uint32_t*)0x20000000 = 0; res = syscall(SYS_accept, -1, 0ul, 0x20000000ul); if (res != -1) r[0] = res; break; case 1: *(uint16_t*)0x20000040 = 0; *(uint8_t*)0x20000042 = 0; *(uint32_t*)0x20000044 = 0x4e22; syscall(SYS_bind, r[0], 0x20000040ul, 8ul); break; case 2: memcpy((void*)0x20000080, "./file0\000", 8); syscall(SYS_fchownat, -1, 0x20000080ul, 0, -1, 2ul); break; case 3: memcpy((void*)0x200000c0, "/dev/bpf\000", 9); res = syscall(SYS_openat, 0xffffffffffffff9cul, 0x200000c0ul, 0x800ul, 0ul); if (res != -1) r[1] = res; break; case 4: syscall(SYS_ioctl, r[1], 0x20004268ul, 0); break; case 5: *(uint32_t*)0x20000100 = 0xfff; memcpy((void*)0x20000104, "./file0\000\000\000\000\000\000\000\000\000", 16); memcpy((void*)0x20000114, "./file0\000\000\000\000\000\000\000\000\000", 16); syscall(SYS_ioctl, -1, 0xc0245755ul, 0x20000100ul); break; case 6: memcpy((void*)0x20000140, "./file0\000", 8); syscall(SYS_readlink, 0x20000140ul, 0x20000180ul, 0x4bul); break; case 7: *(uint32_t*)0x20000200 = 0x100; memcpy((void*)0x20000204, "./file0\000\000\000\000\000\000\000\000\000", 16); memcpy((void*)0x20000214, "./file0\000\000\000\000\000\000\000\000\000", 16); syscall(SYS_ioctl, -1, 0xc0245755ul, 0x20000200ul); break; case 8: res = syscall(SYS_getgid); if (res != -1) r[2] = res; break; case 9: *(uint32_t*)0x20000240 = r[2]; *(uint32_t*)0x20000244 = 0; *(uint32_t*)0x20000248 = -1; *(uint32_t*)0x2000024c = 0; *(uint32_t*)0x20000250 = 0; *(uint32_t*)0x20000254 = 0; syscall(SYS_setgroups, 6ul, 0x20000240ul); break; case 10: *(uint8_t*)0x20000000 = 0xaa; *(uint8_t*)0x20000001 = 0xaa; *(uint8_t*)0x20000002 = 0xaa; *(uint8_t*)0x20000003 = 0xaa; *(uint8_t*)0x20000004 = 0xaa; *(uint8_t*)0x20000005 = 0xaa; memcpy((void*)0x20000006, "\x45\xef\x64\x58\x67\x44", 6); *(uint16_t*)0x2000000c = htobe16(0x9e0); memcpy((void*)0x2000000e, "\x44\x16\x25\x79\x84\x06\xe6\x9a\xbe\x1b\x79\xbf\x2e\xd6\x35\xc5\xe5\xeb\xe1\x1d\xd0\x48\xc4\xd0\x4e\xc7\xd9\x1f\x74\xda\xe4\x84\x94\x2c\xb6\xbb\xbb\x2c\xca\x8d\xc1\xbd\xdf\xb1\x12\xe6\x79\xc3\x03\x01\x0e\xc3\x6e\xf4\xaa\x42\xa6\xa5\xe5\xf1\x09\x0b\x2d\x04\xb6\x02\x6b\x47\x1c\xbf\x45\x0d\x2f\x7b\xff\x65\xf4\x4e\xe4\x3a\xeb\x89\xa0\xf0\x9e\x0d\xc7\x8d\x4e\xb2\x3d\x9a\xbb\x05\x48\xa8\x57\x79\xa9\xd4\xdc\xc0\x45\x3f\x5c\x05\xc5\x08\x7c\xc7\xa5\x67\x11\x12\xf1\xd3\x2e\xe3\xfa\x5b\xdc\xe0\x41\x72\x76\x6f\x5b\x18\x23\x96\x5b\xde\xac\xa8\x24\xd3\xed\x0f\x0d\x4d\x4d\xbd\x57\x52\xff\x05\x41\x9d\xc1\xd3\x81\xfa\x8c\xdd\xa9\x56\x98\x94\xdd\x2a\x35\x6d\xc8\xb6\x16\x4c\xd8\x68\x39\xa9\x68\xce\xfb\x39\xb6\x87\x7e\x95\x9f\xf6\x27\x28\x02", 183); break; case 11: memcpy((void*)0x20000100, "\xc4\xa1\x99\x72\xd4\x29\x66\x43\x0f\xe7\x0b\x36\x43\xd9\x41\x50\x66\xf3\x43\x0f\x12\x0c\x48\xc4\x83\xfd\x00\xdc\x00\x0f\x38\xf9\x43\xac\xf2\xa4\x66\x45\x81\xc1\xd1\xbf\x41\x79\x2b\xc4\x03\xad\x7c\x62\x00\x74", 52); syz_execute_func(0x20000100); break; case 12: break; case 13: syz_open_pts(); break; } } int main(void) { syscall(SYS_mmap, 0x20000000ul, 0x1000000ul, 3ul, 0x1012ul, -1, 0ul, 0ul); do_sandbox_none(); return 0; } :248:4: error: misleading indentation; statement is not part of the previous 'if' [-Werror,-Wmisleading-indentation] kill_and_wait(pid, &status); ^ :246:3: note: previous statement is here if (current_time_ms() - start < 5000) ^ 1 error generated. compiler invocation: c++ [-o /tmp/syz-executor258064503 -DGOOS_openbsd=1 -DGOARCH_amd64=1 -DHOSTGOOS_openbsd=1 -x c - -m64 -static -lutil -O2 -pthread -Wall -Werror -Wparentheses -Wunused-const-variable -Wframe-larger-than=16384] --- FAIL: TestGenerate/openbsd/amd64/14 (4.43s) csource_test.go:124: opts: {Threaded:true Collide:false Repeat:true RepeatTimes:0 Procs:0 Slowdown:1 Sandbox:none Fault:false FaultCall:0 FaultNth:0 Leak:false NetInjection:false NetDevices:false NetReset:false Cgroups:false BinfmtMisc:false CloseFDs:false KCSAN:false DevlinkPCI:false USB:false VhciInjection:false Wifi:false Sysctl:false UseTmpDir:true HandleSegv:false Repro:false Trace:true} program: r0 = accept$unix(0xffffffffffffffff, 0x0, &(0x7f0000000000)) bind$unix(r0, &(0x7f0000000040)=@abs={0x0, 0x0, 0x2}, 0x8) fchownat(0xffffffffffffffff, &(0x7f0000000080)='./file0\x00', 0x0, 0xffffffffffffffff, 0x2) r1 = openat$bpf(0xffffffffffffff9c, &(0x7f00000000c0)='/dev/bpf\x00', 0x800, 0x0) ioctl$BIOCFLUSH(r1, 0x20004268) ioctl$WSDISPLAYIO_GETSCREEN(0xffffffffffffffff, 0xc0245755, &(0x7f0000000100)={0xfff, './file0\x00', './file0\x00'}) readlink(&(0x7f0000000140)='./file0\x00', &(0x7f0000000180)=""/75, 0x4b) ioctl$WSDISPLAYIO_GETSCREEN(0xffffffffffffffff, 0xc0245755, &(0x7f0000000200)={0x100, './file0\x00', './file0\x00'}) r2 = getgid() setgroups(0x6, &(0x7f0000000240)=[r2, 0x0, 0xffffffffffffffff, 0x0, 0x0, 0x0]) syz_emit_ethernet(0xc5, &(0x7f0000000000)={@local, @random="45ef64586744", [], {@generic={0x9e0, "441625798406e69abe1b79bf2ed635c5e5ebe11dd048c4d04ec7d91f74dae484942cb6bbbb2cca8dc1bddfb112e679c303010ec36ef4aa42a6a5e5f1090b2d04b6026b471cbf450d2f7bff65f44ee43aeb89a0f09e0dc78d4eb23d9abb0548a85779a9d4dcc0453f5c05c5087cc7a5671112f1d32ee3fa5bdce04172766f5b1823965bdeaca824d3ed0f0d4d4dbd5752ff05419dc1d381fa8cdda9569894dd2a356dc8b6164cd86839a968cefb39b6877e959ff6272802"}}}) syz_execute_func(&(0x7f0000000100)="c4a19972d42966430fe70b3643d9415066f3430f120c48c483fd00dc000f38f943acf2a4664581c1d1bf41792bc403ad7c620074") syz_extract_tcp_res(&(0x7f0000000140), 0x2, 0xffffff43) syz_open_pts() csource_test.go:125: 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 #include #include #include #include #include #include #include #include #include static void kill_and_wait(int pid, int* status) { kill(pid, SIGKILL); while (waitpid(-1, status, 0) != pid) { } } 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 void __attribute__((noinline)) remove_dir(const char* dir) { DIR* dp = opendir(dir); if (dp == NULL) { if (errno == EACCES) { if (rmdir(dir)) exit(1); return; } exit(1); } struct dirent* ep = 0; while ((ep = readdir(dp))) { if (strcmp(ep->d_name, ".") == 0 || strcmp(ep->d_name, "..") == 0) continue; char filename[FILENAME_MAX]; snprintf(filename, sizeof(filename), "%s/%s", dir, ep->d_name); struct stat st; if (lstat(filename, &st)) exit(1); if (S_ISDIR(st.st_mode)) { remove_dir(filename); continue; } if (unlink(filename)) exit(1); } closedir(dp); if (rmdir(dir)) exit(1); } 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 __syscall syscall static uintptr_t syz_open_pts(void) { int master, slave; if (openpty(&master, &slave, NULL, NULL, NULL) == -1) return -1; if (dup2(master, master + 100) != -1) close(master); return slave; } static void sandbox_common() { struct rlimit rlim; rlim.rlim_cur = rlim.rlim_max = 8 << 20; setrlimit(RLIMIT_MEMLOCK, &rlim); rlim.rlim_cur = rlim.rlim_max = 1 << 20; setrlimit(RLIMIT_FSIZE, &rlim); rlim.rlim_cur = rlim.rlim_max = 1 << 20; setrlimit(RLIMIT_STACK, &rlim); rlim.rlim_cur = rlim.rlim_max = 0; setrlimit(RLIMIT_CORE, &rlim); rlim.rlim_cur = rlim.rlim_max = 256; setrlimit(RLIMIT_NOFILE, &rlim); } static void loop(); static int do_sandbox_none(void) { sandbox_common(); loop(); 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) { fprintf(stderr, "### start\n"); int i, call, thread; for (call = 0; call < 14; 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); 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); #define WAIT_FLAGS 0 static void loop(void) { int iter = 0; for (;; iter++) { char cwdbuf[32]; sprintf(cwdbuf, "./%d", iter); if (mkdir(cwdbuf, 0777)) exit(1); int pid = fork(); if (pid < 0) exit(1); if (pid == 0) { if (chdir(cwdbuf)) exit(1); execute_one(); exit(0); } int status = 0; uint64_t start = current_time_ms(); for (;;) { if (waitpid(-1, &status, WNOHANG | WAIT_FLAGS) == pid) break; sleep_ms(1); if (current_time_ms() - start < 5000) continue; kill_and_wait(pid, &status); break; } remove_dir(cwdbuf); } } uint64_t r[3] = {0xffffffffffffffff, 0xffffffffffffffff, 0x0}; void execute_call(int call) { intptr_t res = 0; switch (call) { case 0: *(uint32_t*)0x20000000 = 0; res = syscall(SYS_accept, -1, 0ul, 0x20000000ul); fprintf(stderr, "### call=0 errno=%u\n", res == -1 ? errno : 0); if (res != -1) r[0] = res; break; case 1: *(uint16_t*)0x20000040 = 0; *(uint8_t*)0x20000042 = 0; *(uint32_t*)0x20000044 = 0x4e22; res = syscall(SYS_bind, r[0], 0x20000040ul, 8ul); fprintf(stderr, "### call=1 errno=%u\n", res == -1 ? errno : 0); break; case 2: memcpy((void*)0x20000080, "./file0\000", 8); res = syscall(SYS_fchownat, -1, 0x20000080ul, 0, -1, 2ul); fprintf(stderr, "### call=2 errno=%u\n", res == -1 ? errno : 0); break; case 3: memcpy((void*)0x200000c0, "/dev/bpf\000", 9); res = syscall(SYS_openat, 0xffffffffffffff9cul, 0x200000c0ul, 0x800ul, 0ul); fprintf(stderr, "### call=3 errno=%u\n", res == -1 ? errno : 0); if (res != -1) r[1] = res; break; case 4: res = syscall(SYS_ioctl, r[1], 0x20004268ul, 0); fprintf(stderr, "### call=4 errno=%u\n", res == -1 ? errno : 0); break; case 5: *(uint32_t*)0x20000100 = 0xfff; memcpy((void*)0x20000104, "./file0\000\000\000\000\000\000\000\000\000", 16); memcpy((void*)0x20000114, "./file0\000\000\000\000\000\000\000\000\000", 16); res = syscall(SYS_ioctl, -1, 0xc0245755ul, 0x20000100ul); fprintf(stderr, "### call=5 errno=%u\n", res == -1 ? errno : 0); break; case 6: memcpy((void*)0x20000140, "./file0\000", 8); res = syscall(SYS_readlink, 0x20000140ul, 0x20000180ul, 0x4bul); fprintf(stderr, "### call=6 errno=%u\n", res == -1 ? errno : 0); break; case 7: *(uint32_t*)0x20000200 = 0x100; memcpy((void*)0x20000204, "./file0\000\000\000\000\000\000\000\000\000", 16); memcpy((void*)0x20000214, "./file0\000\000\000\000\000\000\000\000\000", 16); res = syscall(SYS_ioctl, -1, 0xc0245755ul, 0x20000200ul); fprintf(stderr, "### call=7 errno=%u\n", res == -1 ? errno : 0); break; case 8: res = syscall(SYS_getgid); fprintf(stderr, "### call=8 errno=%u\n", res == -1 ? errno : 0); if (res != -1) r[2] = res; break; case 9: *(uint32_t*)0x20000240 = r[2]; *(uint32_t*)0x20000244 = 0; *(uint32_t*)0x20000248 = -1; *(uint32_t*)0x2000024c = 0; *(uint32_t*)0x20000250 = 0; *(uint32_t*)0x20000254 = 0; res = syscall(SYS_setgroups, 6ul, 0x20000240ul); fprintf(stderr, "### call=9 errno=%u\n", res == -1 ? errno : 0); break; case 10: *(uint8_t*)0x20000000 = 0xaa; *(uint8_t*)0x20000001 = 0xaa; *(uint8_t*)0x20000002 = 0xaa; *(uint8_t*)0x20000003 = 0xaa; *(uint8_t*)0x20000004 = 0xaa; *(uint8_t*)0x20000005 = 0xaa; memcpy((void*)0x20000006, "\x45\xef\x64\x58\x67\x44", 6); *(uint16_t*)0x2000000c = htobe16(0x9e0); memcpy((void*)0x2000000e, "\x44\x16\x25\x79\x84\x06\xe6\x9a\xbe\x1b\x79\xbf\x2e\xd6\x35\xc5\xe5\xeb\xe1\x1d\xd0\x48\xc4\xd0\x4e\xc7\xd9\x1f\x74\xda\xe4\x84\x94\x2c\xb6\xbb\xbb\x2c\xca\x8d\xc1\xbd\xdf\xb1\x12\xe6\x79\xc3\x03\x01\x0e\xc3\x6e\xf4\xaa\x42\xa6\xa5\xe5\xf1\x09\x0b\x2d\x04\xb6\x02\x6b\x47\x1c\xbf\x45\x0d\x2f\x7b\xff\x65\xf4\x4e\xe4\x3a\xeb\x89\xa0\xf0\x9e\x0d\xc7\x8d\x4e\xb2\x3d\x9a\xbb\x05\x48\xa8\x57\x79\xa9\xd4\xdc\xc0\x45\x3f\x5c\x05\xc5\x08\x7c\xc7\xa5\x67\x11\x12\xf1\xd3\x2e\xe3\xfa\x5b\xdc\xe0\x41\x72\x76\x6f\x5b\x18\x23\x96\x5b\xde\xac\xa8\x24\xd3\xed\x0f\x0d\x4d\x4d\xbd\x57\x52\xff\x05\x41\x9d\xc1\xd3\x81\xfa\x8c\xdd\xa9\x56\x98\x94\xdd\x2a\x35\x6d\xc8\xb6\x16\x4c\xd8\x68\x39\xa9\x68\xce\xfb\x39\xb6\x87\x7e\x95\x9f\xf6\x27\x28\x02", 183); (void)res; break; case 11: memcpy((void*)0x20000100, "\xc4\xa1\x99\x72\xd4\x29\x66\x43\x0f\xe7\x0b\x36\x43\xd9\x41\x50\x66\xf3\x43\x0f\x12\x0c\x48\xc4\x83\xfd\x00\xdc\x00\x0f\x38\xf9\x43\xac\xf2\xa4\x66\x45\x81\xc1\xd1\xbf\x41\x79\x2b\xc4\x03\xad\x7c\x62\x00\x74", 52); res = -1; errno = EFAULT; res = syz_execute_func(0x20000100); fprintf(stderr, "### call=11 errno=%u\n", res == -1 ? errno : 0); break; case 12: (void)res; break; case 13: res = -1; errno = EFAULT; res = syz_open_pts(); fprintf(stderr, "### call=13 errno=%u\n", res == -1 ? errno : 0); break; } } int main(void) { syscall(SYS_mmap, 0x20000000ul, 0x1000000ul, 3ul, 0x1012ul, -1, 0ul, 0ul); use_temporary_dir(); do_sandbox_none(); return 0; } :301:4: error: misleading indentation; statement is not part of the previous 'if' [-Werror,-Wmisleading-indentation] kill_and_wait(pid, &status); ^ :299:3: note: previous statement is here if (current_time_ms() - start < 5000) ^ 1 error generated. compiler invocation: c++ [-o /tmp/syz-executor806118762 -DGOOS_openbsd=1 -DGOARCH_amd64=1 -DHOSTGOOS_openbsd=1 -x c - -m64 -static -lutil -O2 -pthread -Wall -Werror -Wparentheses -Wunused-const-variable -Wframe-larger-than=16384] --- FAIL: TestGenerate/openbsd/amd64/13 (4.49s) csource_test.go:124: opts: {Threaded:true Collide:false Repeat:true RepeatTimes:0 Procs:0 Slowdown:1 Sandbox:none Fault:false FaultCall:0 FaultNth:0 Leak:false NetInjection:false NetDevices:false NetReset:false Cgroups:false BinfmtMisc:false CloseFDs:false KCSAN:false DevlinkPCI:false USB:false VhciInjection:false Wifi:false Sysctl:false UseTmpDir:true HandleSegv:false Repro:true Trace:false} program: r0 = accept$unix(0xffffffffffffffff, 0x0, &(0x7f0000000000)) bind$unix(r0, &(0x7f0000000040)=@abs={0x0, 0x0, 0x2}, 0x8) fchownat(0xffffffffffffffff, &(0x7f0000000080)='./file0\x00', 0x0, 0xffffffffffffffff, 0x2) r1 = openat$bpf(0xffffffffffffff9c, &(0x7f00000000c0)='/dev/bpf\x00', 0x800, 0x0) ioctl$BIOCFLUSH(r1, 0x20004268) ioctl$WSDISPLAYIO_GETSCREEN(0xffffffffffffffff, 0xc0245755, &(0x7f0000000100)={0xfff, './file0\x00', './file0\x00'}) readlink(&(0x7f0000000140)='./file0\x00', &(0x7f0000000180)=""/75, 0x4b) ioctl$WSDISPLAYIO_GETSCREEN(0xffffffffffffffff, 0xc0245755, &(0x7f0000000200)={0x100, './file0\x00', './file0\x00'}) r2 = getgid() setgroups(0x6, &(0x7f0000000240)=[r2, 0x0, 0xffffffffffffffff, 0x0, 0x0, 0x0]) syz_emit_ethernet(0xc5, &(0x7f0000000000)={@local, @random="45ef64586744", [], {@generic={0x9e0, "441625798406e69abe1b79bf2ed635c5e5ebe11dd048c4d04ec7d91f74dae484942cb6bbbb2cca8dc1bddfb112e679c303010ec36ef4aa42a6a5e5f1090b2d04b6026b471cbf450d2f7bff65f44ee43aeb89a0f09e0dc78d4eb23d9abb0548a85779a9d4dcc0453f5c05c5087cc7a5671112f1d32ee3fa5bdce04172766f5b1823965bdeaca824d3ed0f0d4d4dbd5752ff05419dc1d381fa8cdda9569894dd2a356dc8b6164cd86839a968cefb39b6877e959ff6272802"}}}) syz_execute_func(&(0x7f0000000100)="c4a19972d42966430fe70b3643d9415066f3430f120c48c483fd00dc000f38f943acf2a4664581c1d1bf41792bc403ad7c620074") syz_extract_tcp_res(&(0x7f0000000140), 0x2, 0xffffff43) syz_open_pts() csource_test.go:125: 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 #include #include #include #include #include #include #include #include #include static void kill_and_wait(int pid, int* status) { kill(pid, SIGKILL); while (waitpid(-1, status, 0) != pid) { } } 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 void __attribute__((noinline)) remove_dir(const char* dir) { DIR* dp = opendir(dir); if (dp == NULL) { if (errno == EACCES) { if (rmdir(dir)) exit(1); return; } exit(1); } struct dirent* ep = 0; while ((ep = readdir(dp))) { if (strcmp(ep->d_name, ".") == 0 || strcmp(ep->d_name, "..") == 0) continue; char filename[FILENAME_MAX]; snprintf(filename, sizeof(filename), "%s/%s", dir, ep->d_name); struct stat st; if (lstat(filename, &st)) exit(1); if (S_ISDIR(st.st_mode)) { remove_dir(filename); continue; } if (unlink(filename)) exit(1); } closedir(dp); if (rmdir(dir)) exit(1); } 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 __syscall syscall static uintptr_t syz_open_pts(void) { int master, slave; if (openpty(&master, &slave, NULL, NULL, NULL) == -1) return -1; if (dup2(master, master + 100) != -1) close(master); return slave; } static void sandbox_common() { struct rlimit rlim; rlim.rlim_cur = rlim.rlim_max = 8 << 20; setrlimit(RLIMIT_MEMLOCK, &rlim); rlim.rlim_cur = rlim.rlim_max = 1 << 20; setrlimit(RLIMIT_FSIZE, &rlim); rlim.rlim_cur = rlim.rlim_max = 1 << 20; setrlimit(RLIMIT_STACK, &rlim); rlim.rlim_cur = rlim.rlim_max = 0; setrlimit(RLIMIT_CORE, &rlim); rlim.rlim_cur = rlim.rlim_max = 256; setrlimit(RLIMIT_NOFILE, &rlim); } static void loop(); static int do_sandbox_none(void) { sandbox_common(); loop(); 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 < 14; 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); 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); #define WAIT_FLAGS 0 static void loop(void) { int iter = 0; for (;; iter++) { char cwdbuf[32]; sprintf(cwdbuf, "./%d", iter); if (mkdir(cwdbuf, 0777)) exit(1); int pid = fork(); if (pid < 0) exit(1); if (pid == 0) { if (chdir(cwdbuf)) exit(1); execute_one(); exit(0); } int status = 0; uint64_t start = current_time_ms(); for (;;) { if (waitpid(-1, &status, WNOHANG | WAIT_FLAGS) == pid) break; sleep_ms(1); if (current_time_ms() - start < 5000) continue; kill_and_wait(pid, &status); break; } remove_dir(cwdbuf); } } uint64_t r[3] = {0xffffffffffffffff, 0xffffffffffffffff, 0x0}; void execute_call(int call) { intptr_t res = 0; switch (call) { case 0: *(uint32_t*)0x20000000 = 0; res = syscall(SYS_accept, -1, 0ul, 0x20000000ul); if (res != -1) r[0] = res; break; case 1: *(uint16_t*)0x20000040 = 0; *(uint8_t*)0x20000042 = 0; *(uint32_t*)0x20000044 = 0x4e22; syscall(SYS_bind, r[0], 0x20000040ul, 8ul); break; case 2: memcpy((void*)0x20000080, "./file0\000", 8); syscall(SYS_fchownat, -1, 0x20000080ul, 0, -1, 2ul); break; case 3: memcpy((void*)0x200000c0, "/dev/bpf\000", 9); res = syscall(SYS_openat, 0xffffffffffffff9cul, 0x200000c0ul, 0x800ul, 0ul); if (res != -1) r[1] = res; break; case 4: syscall(SYS_ioctl, r[1], 0x20004268ul, 0); break; case 5: *(uint32_t*)0x20000100 = 0xfff; memcpy((void*)0x20000104, "./file0\000\000\000\000\000\000\000\000\000", 16); memcpy((void*)0x20000114, "./file0\000\000\000\000\000\000\000\000\000", 16); syscall(SYS_ioctl, -1, 0xc0245755ul, 0x20000100ul); break; case 6: memcpy((void*)0x20000140, "./file0\000", 8); syscall(SYS_readlink, 0x20000140ul, 0x20000180ul, 0x4bul); break; case 7: *(uint32_t*)0x20000200 = 0x100; memcpy((void*)0x20000204, "./file0\000\000\000\000\000\000\000\000\000", 16); memcpy((void*)0x20000214, "./file0\000\000\000\000\000\000\000\000\000", 16); syscall(SYS_ioctl, -1, 0xc0245755ul, 0x20000200ul); break; case 8: res = syscall(SYS_getgid); if (res != -1) r[2] = res; break; case 9: *(uint32_t*)0x20000240 = r[2]; *(uint32_t*)0x20000244 = 0; *(uint32_t*)0x20000248 = -1; *(uint32_t*)0x2000024c = 0; *(uint32_t*)0x20000250 = 0; *(uint32_t*)0x20000254 = 0; syscall(SYS_setgroups, 6ul, 0x20000240ul); break; case 10: *(uint8_t*)0x20000000 = 0xaa; *(uint8_t*)0x20000001 = 0xaa; *(uint8_t*)0x20000002 = 0xaa; *(uint8_t*)0x20000003 = 0xaa; *(uint8_t*)0x20000004 = 0xaa; *(uint8_t*)0x20000005 = 0xaa; memcpy((void*)0x20000006, "\x45\xef\x64\x58\x67\x44", 6); *(uint16_t*)0x2000000c = htobe16(0x9e0); memcpy((void*)0x2000000e, "\x44\x16\x25\x79\x84\x06\xe6\x9a\xbe\x1b\x79\xbf\x2e\xd6\x35\xc5\xe5\xeb\xe1\x1d\xd0\x48\xc4\xd0\x4e\xc7\xd9\x1f\x74\xda\xe4\x84\x94\x2c\xb6\xbb\xbb\x2c\xca\x8d\xc1\xbd\xdf\xb1\x12\xe6\x79\xc3\x03\x01\x0e\xc3\x6e\xf4\xaa\x42\xa6\xa5\xe5\xf1\x09\x0b\x2d\x04\xb6\x02\x6b\x47\x1c\xbf\x45\x0d\x2f\x7b\xff\x65\xf4\x4e\xe4\x3a\xeb\x89\xa0\xf0\x9e\x0d\xc7\x8d\x4e\xb2\x3d\x9a\xbb\x05\x48\xa8\x57\x79\xa9\xd4\xdc\xc0\x45\x3f\x5c\x05\xc5\x08\x7c\xc7\xa5\x67\x11\x12\xf1\xd3\x2e\xe3\xfa\x5b\xdc\xe0\x41\x72\x76\x6f\x5b\x18\x23\x96\x5b\xde\xac\xa8\x24\xd3\xed\x0f\x0d\x4d\x4d\xbd\x57\x52\xff\x05\x41\x9d\xc1\xd3\x81\xfa\x8c\xdd\xa9\x56\x98\x94\xdd\x2a\x35\x6d\xc8\xb6\x16\x4c\xd8\x68\x39\xa9\x68\xce\xfb\x39\xb6\x87\x7e\x95\x9f\xf6\x27\x28\x02", 183); break; case 11: memcpy((void*)0x20000100, "\xc4\xa1\x99\x72\xd4\x29\x66\x43\x0f\xe7\x0b\x36\x43\xd9\x41\x50\x66\xf3\x43\x0f\x12\x0c\x48\xc4\x83\xfd\x00\xdc\x00\x0f\x38\xf9\x43\xac\xf2\xa4\x66\x45\x81\xc1\xd1\xbf\x41\x79\x2b\xc4\x03\xad\x7c\x62\x00\x74", 52); syz_execute_func(0x20000100); break; case 12: break; case 13: syz_open_pts(); break; } } int main(void) { syscall(SYS_mmap, 0x20000000ul, 0x1000000ul, 3ul, 0x1012ul, -1, 0ul, 0ul); use_temporary_dir(); do_sandbox_none(); return 0; } :302:4: error: misleading indentation; statement is not part of the previous 'if' [-Werror,-Wmisleading-indentation] kill_and_wait(pid, &status); ^ :300:3: note: previous statement is here if (current_time_ms() - start < 5000) ^ 1 error generated. compiler invocation: c++ [-o /tmp/syz-executor130747454 -DGOOS_openbsd=1 -DGOARCH_amd64=1 -DHOSTGOOS_openbsd=1 -x c - -m64 -static -lutil -O2 -pthread -Wall -Werror -Wparentheses -Wunused-const-variable -Wframe-larger-than=16384] --- FAIL: TestGenerate/openbsd/amd64/10 (4.68s) csource_test.go:124: opts: {Threaded:true Collide:false Repeat:true RepeatTimes:0 Procs:0 Slowdown:1 Sandbox:none Fault:false FaultCall:0 FaultNth:0 Leak:false NetInjection:true NetDevices:false NetReset:false Cgroups:false BinfmtMisc:false CloseFDs:false KCSAN:false DevlinkPCI:false USB:false VhciInjection:false Wifi:false Sysctl:false UseTmpDir:true HandleSegv:false Repro:false Trace:false} program: r0 = accept$unix(0xffffffffffffffff, 0x0, &(0x7f0000000000)) bind$unix(r0, &(0x7f0000000040)=@abs={0x0, 0x0, 0x2}, 0x8) fchownat(0xffffffffffffffff, &(0x7f0000000080)='./file0\x00', 0x0, 0xffffffffffffffff, 0x2) r1 = openat$bpf(0xffffffffffffff9c, &(0x7f00000000c0)='/dev/bpf\x00', 0x800, 0x0) ioctl$BIOCFLUSH(r1, 0x20004268) ioctl$WSDISPLAYIO_GETSCREEN(0xffffffffffffffff, 0xc0245755, &(0x7f0000000100)={0xfff, './file0\x00', './file0\x00'}) readlink(&(0x7f0000000140)='./file0\x00', &(0x7f0000000180)=""/75, 0x4b) ioctl$WSDISPLAYIO_GETSCREEN(0xffffffffffffffff, 0xc0245755, &(0x7f0000000200)={0x100, './file0\x00', './file0\x00'}) r2 = getgid() setgroups(0x6, &(0x7f0000000240)=[r2, 0x0, 0xffffffffffffffff, 0x0, 0x0, 0x0]) syz_emit_ethernet(0xc5, &(0x7f0000000000)={@local, @random="45ef64586744", [], {@generic={0x9e0, "441625798406e69abe1b79bf2ed635c5e5ebe11dd048c4d04ec7d91f74dae484942cb6bbbb2cca8dc1bddfb112e679c303010ec36ef4aa42a6a5e5f1090b2d04b6026b471cbf450d2f7bff65f44ee43aeb89a0f09e0dc78d4eb23d9abb0548a85779a9d4dcc0453f5c05c5087cc7a5671112f1d32ee3fa5bdce04172766f5b1823965bdeaca824d3ed0f0d4d4dbd5752ff05419dc1d381fa8cdda9569894dd2a356dc8b6164cd86839a968cefb39b6877e959ff6272802"}}}) syz_execute_func(&(0x7f0000000100)="c4a19972d42966430fe70b3643d9415066f3430f120c48c483fd00dc000f38f943acf2a4664581c1d1bf41792bc403ad7c620074") syz_extract_tcp_res(&(0x7f0000000140), 0x2, 0xffffff43) syz_open_pts() csource_test.go:125: 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 #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include static unsigned long long procid; static void kill_and_wait(int pid, int* status) { kill(pid, SIGKILL); while (waitpid(-1, status, 0) != pid) { } } 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 void __attribute__((noinline)) remove_dir(const char* dir) { DIR* dp = opendir(dir); if (dp == NULL) { if (errno == EACCES) { if (rmdir(dir)) exit(1); return; } exit(1); } struct dirent* ep = 0; while ((ep = readdir(dp))) { if (strcmp(ep->d_name, ".") == 0 || strcmp(ep->d_name, "..") == 0) continue; char filename[FILENAME_MAX]; snprintf(filename, sizeof(filename), "%s/%s", dir, ep->d_name); struct stat st; if (lstat(filename, &st)) exit(1); if (S_ISDIR(st.st_mode)) { remove_dir(filename); continue; } if (unlink(filename)) exit(1); } closedir(dp); if (rmdir(dir)) exit(1); } 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 __syscall syscall static uintptr_t syz_open_pts(void) { int master, slave; if (openpty(&master, &slave, NULL, NULL, NULL) == -1) return -1; if (dup2(master, master + 100) != -1) close(master); return slave; } static int tunfd = -1; #define MAX_TUN 4 #define TUN_IFACE "tap%d" #define TUN_DEVICE "/dev/tap%d" #define LOCAL_MAC "aa:aa:aa:aa:aa:aa" #define REMOTE_MAC "aa:aa:aa:aa:aa:bb" #define LOCAL_IPV4 "172.20.%d.170" #define REMOTE_IPV4 "172.20.%d.187" #define LOCAL_IPV6 "fe80::%02hxaa" #define REMOTE_IPV6 "fe80::%02hxbb" static void vsnprintf_check(char* str, size_t size, const char* format, va_list args) { int rv = vsnprintf(str, size, format, args); if (rv < 0) exit(1); if ((size_t)rv >= size) exit(1); } static void snprintf_check(char* str, size_t size, const char* format, ...) { va_list args; va_start(args, format); vsnprintf_check(str, size, format, args); va_end(args); } #define COMMAND_MAX_LEN 128 #define PATH_PREFIX "PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin " #define PATH_PREFIX_LEN (sizeof(PATH_PREFIX) - 1) static void execute_command(bool panic, const char* format, ...) { va_list args; va_start(args, format); char command[PATH_PREFIX_LEN + COMMAND_MAX_LEN]; memcpy(command, PATH_PREFIX, PATH_PREFIX_LEN); vsnprintf_check(command + PATH_PREFIX_LEN, COMMAND_MAX_LEN, format, args); va_end(args); int rv = system(command); if (rv) { if (panic) exit(1); } } static void initialize_tun(int tun_id) { if (tun_id < 0 || tun_id >= MAX_TUN) { exit(1); } char tun_device[sizeof(TUN_DEVICE)]; snprintf_check(tun_device, sizeof(tun_device), TUN_DEVICE, tun_id); char tun_iface[sizeof(TUN_IFACE)]; snprintf_check(tun_iface, sizeof(tun_iface), TUN_IFACE, tun_id); execute_command(0, "ifconfig %s destroy", tun_device); tunfd = open(tun_device, O_RDWR | O_NONBLOCK); if (tunfd == -1) { printf("tun: can't open %s: errno=%d\n", tun_device, errno); return; } const int kTunFd = 240; if (dup2(tunfd, kTunFd) < 0) exit(1); close(tunfd); tunfd = kTunFd; char local_mac[sizeof(LOCAL_MAC)]; snprintf_check(local_mac, sizeof(local_mac), LOCAL_MAC); execute_command(1, "ifconfig %s lladdr %s", tun_iface, local_mac); char local_ipv4[sizeof(LOCAL_IPV4)]; snprintf_check(local_ipv4, sizeof(local_ipv4), LOCAL_IPV4, tun_id); execute_command(1, "ifconfig %s inet %s netmask 255.255.255.0", tun_iface, local_ipv4); char remote_mac[sizeof(REMOTE_MAC)]; char remote_ipv4[sizeof(REMOTE_IPV4)]; snprintf_check(remote_mac, sizeof(remote_mac), REMOTE_MAC); snprintf_check(remote_ipv4, sizeof(remote_ipv4), REMOTE_IPV4, tun_id); execute_command(0, "arp -s %s %s", remote_ipv4, remote_mac); char local_ipv6[sizeof(LOCAL_IPV6)]; snprintf_check(local_ipv6, sizeof(local_ipv6), LOCAL_IPV6, tun_id); execute_command(1, "ifconfig %s inet6 %s", tun_iface, local_ipv6); char remote_ipv6[sizeof(REMOTE_IPV6)]; snprintf_check(remote_ipv6, sizeof(remote_ipv6), REMOTE_IPV6, tun_id); execute_command(0, "ndp -s %s%%%s %s", remote_ipv6, tun_iface, remote_mac); } static long syz_emit_ethernet(volatile long a0, volatile long a1) { if (tunfd < 0) return (uintptr_t)-1; size_t length = a0; const char* data = (char*)a1; return write(tunfd, data, length); } static int read_tun(char* data, int size) { if (tunfd < 0) return -1; int rv = read(tunfd, data, size); if (rv < 0) { if (errno == EAGAIN) return -1; exit(1); } return rv; } struct tcp_resources { uint32_t seq; uint32_t ack; }; static long syz_extract_tcp_res(volatile long a0, volatile long a1, volatile long a2) { if (tunfd < 0) return (uintptr_t)-1; char data[1000]; int rv = read_tun(&data[0], sizeof(data)); if (rv == -1) return (uintptr_t)-1; size_t length = rv; if (length < sizeof(struct ether_header)) return (uintptr_t)-1; struct ether_header* ethhdr = (struct ether_header*)&data[0]; struct tcphdr* tcphdr = 0; if (ethhdr->ether_type == htons(ETHERTYPE_IP)) { if (length < sizeof(struct ether_header) + sizeof(struct ip)) return (uintptr_t)-1; struct ip* iphdr = (struct ip*)&data[sizeof(struct ether_header)]; if (iphdr->ip_p != IPPROTO_TCP) return (uintptr_t)-1; if (length < sizeof(struct ether_header) + iphdr->ip_hl * 4 + sizeof(struct tcphdr)) return (uintptr_t)-1; tcphdr = (struct tcphdr*)&data[sizeof(struct ether_header) + iphdr->ip_hl * 4]; } else { if (length < sizeof(struct ether_header) + sizeof(struct ip6_hdr)) return (uintptr_t)-1; struct ip6_hdr* ipv6hdr = (struct ip6_hdr*)&data[sizeof(struct ether_header)]; if (ipv6hdr->ip6_nxt != IPPROTO_TCP) return (uintptr_t)-1; if (length < sizeof(struct ether_header) + sizeof(struct ip6_hdr) + sizeof(struct tcphdr)) return (uintptr_t)-1; tcphdr = (struct tcphdr*)&data[sizeof(struct ether_header) + sizeof(struct ip6_hdr)]; } struct tcp_resources* res = (struct tcp_resources*)a0; res->seq = htonl(ntohl(tcphdr->th_seq) + (uint32_t)a1); res->ack = htonl(ntohl(tcphdr->th_ack) + (uint32_t)a2); return 0; } static void sandbox_common() { struct rlimit rlim; rlim.rlim_cur = rlim.rlim_max = 8 << 20; setrlimit(RLIMIT_MEMLOCK, &rlim); rlim.rlim_cur = rlim.rlim_max = 1 << 20; setrlimit(RLIMIT_FSIZE, &rlim); rlim.rlim_cur = rlim.rlim_max = 1 << 20; setrlimit(RLIMIT_STACK, &rlim); rlim.rlim_cur = rlim.rlim_max = 0; setrlimit(RLIMIT_CORE, &rlim); rlim.rlim_cur = rlim.rlim_max = 256; setrlimit(RLIMIT_NOFILE, &rlim); } static void loop(); static int do_sandbox_none(void) { sandbox_common(); initialize_tun(procid); loop(); 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 < 14; 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); 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); #define WAIT_FLAGS 0 static void loop(void) { int iter = 0; for (;; iter++) { char cwdbuf[32]; sprintf(cwdbuf, "./%d", iter); if (mkdir(cwdbuf, 0777)) exit(1); int pid = fork(); if (pid < 0) exit(1); if (pid == 0) { if (chdir(cwdbuf)) exit(1); execute_one(); exit(0); } int status = 0; uint64_t start = current_time_ms(); for (;;) { if (waitpid(-1, &status, WNOHANG | WAIT_FLAGS) == pid) break; sleep_ms(1); if (current_time_ms() - start < 5000) continue; kill_and_wait(pid, &status); break; } remove_dir(cwdbuf); } } uint64_t r[3] = {0xffffffffffffffff, 0xffffffffffffffff, 0x0}; void execute_call(int call) { intptr_t res = 0; switch (call) { case 0: *(uint32_t*)0x20000000 = 0; res = syscall(SYS_accept, -1, 0ul, 0x20000000ul); if (res != -1) r[0] = res; break; case 1: *(uint16_t*)0x20000040 = 0; *(uint8_t*)0x20000042 = 0; *(uint32_t*)0x20000044 = 0x4e22; syscall(SYS_bind, r[0], 0x20000040ul, 8ul); break; case 2: memcpy((void*)0x20000080, "./file0\000", 8); syscall(SYS_fchownat, -1, 0x20000080ul, 0, -1, 2ul); break; case 3: memcpy((void*)0x200000c0, "/dev/bpf\000", 9); res = syscall(SYS_openat, 0xffffffffffffff9cul, 0x200000c0ul, 0x800ul, 0ul); if (res != -1) r[1] = res; break; case 4: syscall(SYS_ioctl, r[1], 0x20004268ul, 0); break; case 5: *(uint32_t*)0x20000100 = 0xfff; memcpy((void*)0x20000104, "./file0\000\000\000\000\000\000\000\000\000", 16); memcpy((void*)0x20000114, "./file0\000\000\000\000\000\000\000\000\000", 16); syscall(SYS_ioctl, -1, 0xc0245755ul, 0x20000100ul); break; case 6: memcpy((void*)0x20000140, "./file0\000", 8); syscall(SYS_readlink, 0x20000140ul, 0x20000180ul, 0x4bul); break; case 7: *(uint32_t*)0x20000200 = 0x100; memcpy((void*)0x20000204, "./file0\000\000\000\000\000\000\000\000\000", 16); memcpy((void*)0x20000214, "./file0\000\000\000\000\000\000\000\000\000", 16); syscall(SYS_ioctl, -1, 0xc0245755ul, 0x20000200ul); break; case 8: res = syscall(SYS_getgid); if (res != -1) r[2] = res; break; case 9: *(uint32_t*)0x20000240 = r[2]; *(uint32_t*)0x20000244 = 0; *(uint32_t*)0x20000248 = -1; *(uint32_t*)0x2000024c = 0; *(uint32_t*)0x20000250 = 0; *(uint32_t*)0x20000254 = 0; syscall(SYS_setgroups, 6ul, 0x20000240ul); break; case 10: *(uint8_t*)0x20000000 = 0xaa; *(uint8_t*)0x20000001 = 0xaa; *(uint8_t*)0x20000002 = 0xaa; *(uint8_t*)0x20000003 = 0xaa; *(uint8_t*)0x20000004 = 0xaa; *(uint8_t*)0x20000005 = 0xaa; memcpy((void*)0x20000006, "\x45\xef\x64\x58\x67\x44", 6); *(uint16_t*)0x2000000c = htobe16(0x9e0); memcpy((void*)0x2000000e, "\x44\x16\x25\x79\x84\x06\xe6\x9a\xbe\x1b\x79\xbf\x2e\xd6\x35\xc5\xe5\xeb\xe1\x1d\xd0\x48\xc4\xd0\x4e\xc7\xd9\x1f\x74\xda\xe4\x84\x94\x2c\xb6\xbb\xbb\x2c\xca\x8d\xc1\xbd\xdf\xb1\x12\xe6\x79\xc3\x03\x01\x0e\xc3\x6e\xf4\xaa\x42\xa6\xa5\xe5\xf1\x09\x0b\x2d\x04\xb6\x02\x6b\x47\x1c\xbf\x45\x0d\x2f\x7b\xff\x65\xf4\x4e\xe4\x3a\xeb\x89\xa0\xf0\x9e\x0d\xc7\x8d\x4e\xb2\x3d\x9a\xbb\x05\x48\xa8\x57\x79\xa9\xd4\xdc\xc0\x45\x3f\x5c\x05\xc5\x08\x7c\xc7\xa5\x67\x11\x12\xf1\xd3\x2e\xe3\xfa\x5b\xdc\xe0\x41\x72\x76\x6f\x5b\x18\x23\x96\x5b\xde\xac\xa8\x24\xd3\xed\x0f\x0d\x4d\x4d\xbd\x57\x52\xff\x05\x41\x9d\xc1\xd3\x81\xfa\x8c\xdd\xa9\x56\x98\x94\xdd\x2a\x35\x6d\xc8\xb6\x16\x4c\xd8\x68\x39\xa9\x68\xce\xfb\x39\xb6\x87\x7e\x95\x9f\xf6\x27\x28\x02", 183); syz_emit_ethernet(0xc5, 0x20000000); break; case 11: memcpy((void*)0x20000100, "\xc4\xa1\x99\x72\xd4\x29\x66\x43\x0f\xe7\x0b\x36\x43\xd9\x41\x50\x66\xf3\x43\x0f\x12\x0c\x48\xc4\x83\xfd\x00\xdc\x00\x0f\x38\xf9\x43\xac\xf2\xa4\x66\x45\x81\xc1\xd1\xbf\x41\x79\x2b\xc4\x03\xad\x7c\x62\x00\x74", 52); syz_execute_func(0x20000100); break; case 12: syz_extract_tcp_res(0x20000140, 2, 0xffffff43); break; case 13: syz_open_pts(); break; } } int main(void) { syscall(SYS_mmap, 0x20000000ul, 0x1000000ul, 3ul, 0x1012ul, -1, 0ul, 0ul); use_temporary_dir(); do_sandbox_none(); return 0; } :468:4: error: misleading indentation; statement is not part of the previous 'if' [-Werror,-Wmisleading-indentation] kill_and_wait(pid, &status); ^ :466:3: note: previous statement is here if (current_time_ms() - start < 5000) ^ 1 error generated. compiler invocation: c++ [-o /tmp/syz-executor690041900 -DGOOS_openbsd=1 -DGOARCH_amd64=1 -DHOSTGOOS_openbsd=1 -x c - -m64 -static -lutil -O2 -pthread -Wall -Werror -Wparentheses -Wunused-const-variable -Wframe-larger-than=16384] --- FAIL: TestGenerate/openbsd/amd64/4 (3.11s) csource_test.go:122: --- FAIL: TestGenerate/openbsd/amd64/7 (3.04s) csource_test.go:122: --- FAIL: TestGenerate/openbsd/amd64/6 (3.03s) csource_test.go:124: opts: {Threaded:true Collide:false Repeat:true RepeatTimes:0 Procs:4 Slowdown:1 Sandbox:none Fault:false FaultCall:0 FaultNth:0 Leak:false NetInjection:false NetDevices:false NetReset:false Cgroups:false BinfmtMisc:false CloseFDs:false KCSAN:false DevlinkPCI:false USB:false VhciInjection:false Wifi:false Sysctl:false UseTmpDir:true HandleSegv:false Repro:false Trace:false} program: r0 = accept$unix(0xffffffffffffffff, 0x0, &(0x7f0000000000)) bind$unix(r0, &(0x7f0000000040)=@abs={0x0, 0x0, 0x2}, 0x8) fchownat(0xffffffffffffffff, &(0x7f0000000080)='./file0\x00', 0x0, 0xffffffffffffffff, 0x2) r1 = openat$bpf(0xffffffffffffff9c, &(0x7f00000000c0)='/dev/bpf\x00', 0x800, 0x0) ioctl$BIOCFLUSH(r1, 0x20004268) ioctl$WSDISPLAYIO_GETSCREEN(0xffffffffffffffff, 0xc0245755, &(0x7f0000000100)={0xfff, './file0\x00', './file0\x00'}) readlink(&(0x7f0000000140)='./file0\x00', &(0x7f0000000180)=""/75, 0x4b) ioctl$WSDISPLAYIO_GETSCREEN(0xffffffffffffffff, 0xc0245755, &(0x7f0000000200)={0x100, './file0\x00', './file0\x00'}) r2 = getgid() setgroups(0x6, &(0x7f0000000240)=[r2, 0x0, 0xffffffffffffffff, 0x0, 0x0, 0x0]) syz_emit_ethernet(0xc5, &(0x7f0000000000)={@local, @random="45ef64586744", [], {@generic={0x9e0, "441625798406e69abe1b79bf2ed635c5e5ebe11dd048c4d04ec7d91f74dae484942cb6bbbb2cca8dc1bddfb112e679c303010ec36ef4aa42a6a5e5f1090b2d04b6026b471cbf450d2f7bff65f44ee43aeb89a0f09e0dc78d4eb23d9abb0548a85779a9d4dcc0453f5c05c5087cc7a5671112f1d32ee3fa5bdce04172766f5b1823965bdeaca824d3ed0f0d4d4dbd5752ff05419dc1d381fa8cdda9569894dd2a356dc8b6164cd86839a968cefb39b6877e959ff6272802"}}}) syz_execute_func(&(0x7f0000000100)="c4a19972d42966430fe70b3643d9415066f3430f120c48c483fd00dc000f38f943acf2a4664581c1d1bf41792bc403ad7c620074") syz_extract_tcp_res(&(0x7f0000000140), 0x2, 0xffffff43) syz_open_pts() csource_test.go:125: 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 #include #include #include #include #include #include #include #include #include static unsigned long long procid; static void kill_and_wait(int pid, int* status) { kill(pid, SIGKILL); while (waitpid(-1, status, 0) != pid) { } } 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 void __attribute__((noinline)) remove_dir(const char* dir) { DIR* dp = opendir(dir); if (dp == NULL) { if (errno == EACCES) { if (rmdir(dir)) exit(1); return; } exit(1); } struct dirent* ep = 0; while ((ep = readdir(dp))) { if (strcmp(ep->d_name, ".") == 0 || strcmp(ep->d_name, "..") == 0) continue; char filename[FILENAME_MAX]; snprintf(filename, sizeof(filename), "%s/%s", dir, ep->d_name); struct stat st; if (lstat(filename, &st)) exit(1); if (S_ISDIR(st.st_mode)) { remove_dir(filename); continue; } if (unlink(filename)) exit(1); } closedir(dp); if (rmdir(dir)) exit(1); } 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 __syscall syscall static uintptr_t syz_open_pts(void) { int master, slave; if (openpty(&master, &slave, NULL, NULL, NULL) == -1) return -1; if (dup2(master, master + 100) != -1) close(master); return slave; } static void sandbox_common() { struct rlimit rlim; rlim.rlim_cur = rlim.rlim_max = 8 << 20; setrlimit(RLIMIT_MEMLOCK, &rlim); rlim.rlim_cur = rlim.rlim_max = 1 << 20; setrlimit(RLIMIT_FSIZE, &rlim); rlim.rlim_cur = rlim.rlim_max = 1 << 20; setrlimit(RLIMIT_STACK, &rlim); rlim.rlim_cur = rlim.rlim_max = 0; setrlimit(RLIMIT_CORE, &rlim); rlim.rlim_cur = rlim.rlim_max = 256; setrlimit(RLIMIT_NOFILE, &rlim); } static void loop(); static int do_sandbox_none(void) { sandbox_common(); loop(); 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 < 14; 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); 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); #define WAIT_FLAGS 0 static void loop(void) { int iter = 0; for (;; iter++) { char cwdbuf[32]; sprintf(cwdbuf, "./%d", iter); if (mkdir(cwdbuf, 0777)) exit(1); int pid = fork(); if (pid < 0) exit(1); if (pid == 0) { if (chdir(cwdbuf)) exit(1); execute_one(); exit(0); } int status = 0; uint64_t start = current_time_ms(); for (;;) { if (waitpid(-1, &status, WNOHANG | WAIT_FLAGS) == pid) break; sleep_ms(1); if (current_time_ms() - start < 5000) continue; kill_and_wait(pid, &status); break; } remove_dir(cwdbuf); } } uint64_t r[3] = {0xffffffffffffffff, 0xffffffffffffffff, 0x0}; void execute_call(int call) { intptr_t res = 0; switch (call) { case 0: *(uint32_t*)0x20000000 = 0; res = syscall(SYS_accept, -1, 0ul, 0x20000000ul); if (res != -1) r[0] = res; break; case 1: *(uint16_t*)0x20000040 = 0; *(uint8_t*)0x20000042 = 0; *(uint32_t*)0x20000044 = 0x4e22 + procid*4; syscall(SYS_bind, r[0], 0x20000040ul, 8ul); break; case 2: memcpy((void*)0x20000080, "./file0\000", 8); syscall(SYS_fchownat, -1, 0x20000080ul, 0, -1, 2ul); break; case 3: memcpy((void*)0x200000c0, "/dev/bpf\000", 9); res = syscall(SYS_openat, 0xffffffffffffff9cul, 0x200000c0ul, 0x800ul, 0ul); if (res != -1) r[1] = res; break; case 4: syscall(SYS_ioctl, r[1], 0x20004268ul, 0); break; case 5: *(uint32_t*)0x20000100 = 0xfff; memcpy((void*)0x20000104, "./file0\000\000\000\000\000\000\000\000\000", 16); memcpy((void*)0x20000114, "./file0\000\000\000\000\000\000\000\000\000", 16); syscall(SYS_ioctl, -1, 0xc0245755ul, 0x20000100ul); break; case 6: memcpy((void*)0x20000140, "./file0\000", 8); syscall(SYS_readlink, 0x20000140ul, 0x20000180ul, 0x4bul); break; case 7: *(uint32_t*)0x20000200 = 0x100; memcpy((void*)0x20000204, "./file0\000\000\000\000\000\000\000\000\000", 16); memcpy((void*)0x20000214, "./file0\000\000\000\000\000\000\000\000\000", 16); syscall(SYS_ioctl, -1, 0xc0245755ul, 0x20000200ul); break; case 8: res = syscall(SYS_getgid); if (res != -1) r[2] = res; break; case 9: *(uint32_t*)0x20000240 = r[2]; *(uint32_t*)0x20000244 = 0; *(uint32_t*)0x20000248 = -1; *(uint32_t*)0x2000024c = 0; *(uint32_t*)0x20000250 = 0; *(uint32_t*)0x20000254 = 0; syscall(SYS_setgroups, 6ul, 0x20000240ul); break; case 10: *(uint8_t*)0x20000000 = 0xaa; *(uint8_t*)0x20000001 = 0xaa; *(uint8_t*)0x20000002 = 0xaa; *(uint8_t*)0x20000003 = 0xaa; *(uint8_t*)0x20000004 = 0xaa; *(uint8_t*)0x20000005 = 0xaa; memcpy((void*)0x20000006, "\x45\xef\x64\x58\x67\x44", 6); *(uint16_t*)0x2000000c = htobe16(0x9e0); memcpy((void*)0x2000000e, "\x44\x16\x25\x79\x84\x06\xe6\x9a\xbe\x1b\x79\xbf\x2e\xd6\x35\xc5\xe5\xeb\xe1\x1d\xd0\x48\xc4\xd0\x4e\xc7\xd9\x1f\x74\xda\xe4\x84\x94\x2c\xb6\xbb\xbb\x2c\xca\x8d\xc1\xbd\xdf\xb1\x12\xe6\x79\xc3\x03\x01\x0e\xc3\x6e\xf4\xaa\x42\xa6\xa5\xe5\xf1\x09\x0b\x2d\x04\xb6\x02\x6b\x47\x1c\xbf\x45\x0d\x2f\x7b\xff\x65\xf4\x4e\xe4\x3a\xeb\x89\xa0\xf0\x9e\x0d\xc7\x8d\x4e\xb2\x3d\x9a\xbb\x05\x48\xa8\x57\x79\xa9\xd4\xdc\xc0\x45\x3f\x5c\x05\xc5\x08\x7c\xc7\xa5\x67\x11\x12\xf1\xd3\x2e\xe3\xfa\x5b\xdc\xe0\x41\x72\x76\x6f\x5b\x18\x23\x96\x5b\xde\xac\xa8\x24\xd3\xed\x0f\x0d\x4d\x4d\xbd\x57\x52\xff\x05\x41\x9d\xc1\xd3\x81\xfa\x8c\xdd\xa9\x56\x98\x94\xdd\x2a\x35\x6d\xc8\xb6\x16\x4c\xd8\x68\x39\xa9\x68\xce\xfb\x39\xb6\x87\x7e\x95\x9f\xf6\x27\x28\x02", 183); break; case 11: memcpy((void*)0x20000100, "\xc4\xa1\x99\x72\xd4\x29\x66\x43\x0f\xe7\x0b\x36\x43\xd9\x41\x50\x66\xf3\x43\x0f\x12\x0c\x48\xc4\x83\xfd\x00\xdc\x00\x0f\x38\xf9\x43\xac\xf2\xa4\x66\x45\x81\xc1\xd1\xbf\x41\x79\x2b\xc4\x03\xad\x7c\x62\x00\x74", 52); syz_execute_func(0x20000100); break; case 12: break; case 13: syz_open_pts(); break; } } int main(void) { syscall(SYS_mmap, 0x20000000ul, 0x1000000ul, 3ul, 0x1012ul, -1, 0ul, 0ul); for (procid = 0; procid < 4; procid++) { if (fork() == 0) { use_temporary_dir(); do_sandbox_none(); } } sleep(1000000); return 0; } :302:4: error: misleading indentation; statement is not part of the previous 'if' [-Werror,-Wmisleading-indentation] kill_and_wait(pid, &status); ^ :300:3: note: previous statement is here if (current_time_ms() - start < 5000) ^ 1 error generated. compiler invocation: c++ [-o /tmp/syz-executor773208319 -DGOOS_openbsd=1 -DGOARCH_amd64=1 -DHOSTGOOS_openbsd=1 -x c - -m64 -static -lutil -O2 -pthread -Wall -Werror -Wparentheses -Wunused-const-variable -Wframe-larger-than=16384] --- FAIL: TestGenerate/openbsd/amd64/2 (2.67s) csource_test.go:122: --- FAIL: TestGenerate/openbsd/amd64/5 (3.22s) csource_test.go:122: --- FAIL: TestGenerate/openbsd/amd64/1 (2.53s) csource_test.go:122: FAIL FAIL github.com/google/syzkaller/pkg/csource 21.588s ok github.com/google/syzkaller/pkg/db (cached) ? github.com/google/syzkaller/pkg/debugtracer [no test files] ok github.com/google/syzkaller/pkg/email (cached) ? github.com/google/syzkaller/pkg/gce [no test files] ? github.com/google/syzkaller/pkg/gcs [no test files] ? github.com/google/syzkaller/pkg/hash [no test files] ok github.com/google/syzkaller/pkg/host (cached) ? github.com/google/syzkaller/pkg/html [no test files] ok github.com/google/syzkaller/pkg/ifuzz (cached) ? github.com/google/syzkaller/pkg/ifuzz/iset [no test files] ? github.com/google/syzkaller/pkg/ifuzz/powerpc [no test files] ? github.com/google/syzkaller/pkg/ifuzz/powerpc/generated [no test files] ? github.com/google/syzkaller/pkg/ifuzz/x86 [no test files] ? github.com/google/syzkaller/pkg/ifuzz/x86/gen [no test files] ? github.com/google/syzkaller/pkg/ifuzz/x86/generated [no test files] ok github.com/google/syzkaller/pkg/instance (cached) ok github.com/google/syzkaller/pkg/ipc (cached) ? github.com/google/syzkaller/pkg/ipc/ipcconfig [no test files] ? github.com/google/syzkaller/pkg/kcidb [no test files] ok github.com/google/syzkaller/pkg/kconfig 0.523s 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) ? github.com/google/syzkaller/pkg/rpctype [no test files] ok github.com/google/syzkaller/pkg/runtest (cached) ok github.com/google/syzkaller/pkg/serializer (cached) ? github.com/google/syzkaller/pkg/signal [no test files] 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) ? 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/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] ok github.com/google/syzkaller/sys/linux (cached) ? github.com/google/syzkaller/sys/linux/gen [no test files] ? github.com/google/syzkaller/sys/netbsd [no test files] ? github.com/google/syzkaller/sys/netbsd/gen [no test files] ok github.com/google/syzkaller/sys/openbsd (cached) ? 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] ok github.com/google/syzkaller/syz-ci (cached) 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) ? 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-check [no test files] ? github.com/google/syzkaller/tools/syz-cover [no test files] ? github.com/google/syzkaller/tools/syz-crush [no test files] ? github.com/google/syzkaller/tools/syz-db [no test files] ? github.com/google/syzkaller/tools/syz-execprog [no test files] ? github.com/google/syzkaller/tools/syz-expand [no test files] ? github.com/google/syzkaller/tools/syz-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-kconf [no test files] ok github.com/google/syzkaller/tools/syz-linter (cached) ? 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-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] ? github.com/google/syzkaller/tools/syz-testbuild [no test files] ? github.com/google/syzkaller/tools/syz-trace2syz [no test files] ok github.com/google/syzkaller/tools/syz-trace2syz/parser (cached) ok github.com/google/syzkaller/tools/syz-trace2syz/proggen (cached) ? github.com/google/syzkaller/tools/syz-tty [no test files] ? github.com/google/syzkaller/tools/syz-upgrade [no test files] ? github.com/google/syzkaller/tools/syz-usbgen [no test files] ok github.com/google/syzkaller/vm (cached) ? github.com/google/syzkaller/vm/adb [no test files] ? github.com/google/syzkaller/vm/bhyve [no test files] ? github.com/google/syzkaller/vm/gce [no test files] ? github.com/google/syzkaller/vm/gvisor [no test files] ok github.com/google/syzkaller/vm/isolated (cached) ? github.com/google/syzkaller/vm/kvm [no test files] ? github.com/google/syzkaller/vm/odroid [no test files] ? github.com/google/syzkaller/vm/qemu [no test files] ok github.com/google/syzkaller/vm/vmimpl (cached) ? github.com/google/syzkaller/vm/vmm [no test files] ? github.com/google/syzkaller/vm/vmware [no test files] FAIL