ok github.com/google/syzkaller/dashboard/app (cached) ? github.com/google/syzkaller/dashboard/dashapi [no test files] ok github.com/google/syzkaller/executor 1.144s ok github.com/google/syzkaller/pkg/ast 3.725s ok github.com/google/syzkaller/pkg/auth (cached) ok github.com/google/syzkaller/pkg/bisect (cached) ok github.com/google/syzkaller/pkg/build (cached) ok github.com/google/syzkaller/pkg/compiler 28.696s ? github.com/google/syzkaller/pkg/config [no test files] ok github.com/google/syzkaller/pkg/cover (cached) ok github.com/google/syzkaller/pkg/cover/backend (cached) --- FAIL: TestGenerate (7.22s) --- FAIL: TestGenerate/openbsd/amd64 (0.29s) csource_test.go:52: seed=1633442061242854919 --- FAIL: TestGenerate/openbsd/amd64/0 (1.89s) csource_test.go:118: opts: {Threaded:false Collide:false Repeat:true RepeatTimes:0 Procs:0 Slowdown:1 Sandbox:none Leak:false NetInjection:false NetDevices:false NetReset:false Cgroups:false BinfmtMisc:false CloseFDs:false KCSAN:false DevlinkPCI:false USB:false VhciInjection:false Wifi:false IEEE802154:false Sysctl:false UseTmpDir:true HandleSegv:false Repro:false Trace:false LegacyOptions:{Fault:false FaultCall:0 FaultNth:0}} program: ioctl$TIOCSBRK(0xffffffffffffffff, 0x2000747b) (fail_nth: 1) r0 = openat(0xffffffffffffffff, &(0x7f0000000000)='./file0\x00', 0x80, 0x20) ioctl$TIOCEXCL(r0, 0x2000740d) ioctl$TIOCCONS(r0, 0x80047462, &(0x7f0000000040)=0x5) ioctl$TIOCMBIS(r0, 0x8004746c, &(0x7f0000000080)=0x7) r1 = openat$wsmuxkbd(0xffffffffffffff9c, &(0x7f00000000c0), 0x80, 0x0) mkdirat(r1, &(0x7f0000000100)='./file0\x00', 0x9) ioctl$TIOCMBIC(r1, 0x8004746b, &(0x7f0000000140)=0x101) ioctl$TIOCSCTTY(r1, 0x20007461) ioctl$TIOCGWINSZ(r0, 0x40087468, &(0x7f0000000180)) syz_emit_ethernet(0xee, &(0x7f0000000000)={@empty, @remote, [], {@ipv6={0x86dd, {0x9, 0x6, "43f4aa", 0xb8, 0xff, 0x7f, @rand_addr="90d30d80c6d6830e89f4b2318b419ae5", @mcast1, {[@hopopts={0x29, 0x2, '\x00', [@pad1, @enc_lim, @ra={0x5, 0x2, 0x7f}, @pad1, @ra={0x5, 0x2, 0x9}]}, @routing={0x0, 0xa, 0x0, 0x40, 0x0, [@mcast1, @mcast1, @remote={0xfe, 0x80, '\x00', 0x0}, @remote={0xfe, 0x80, '\x00', 0x0}, @remote={0xfe, 0x80, '\x00', 0x0}]}, @routing={0x2, 0x4, 0x0, 0x9, 0x0, [@mcast2, @loopback]}], @icmpv6=@mld={0x83, 0x0, 0x0, 0x6, 0x0, @rand_addr="e8e6cb3cf819ff793d2471370fdbf3d9"}}}}}}) syz_execute_func(&(0x7f0000000100)="362e450f1824ce66400f72d300656641d9edc401fd105b00c4a3c17e3b00f20f70b100000000b5c4620d9fa41811000000f3460f2c94e8ec280000f30f1eed46e110") syz_extract_tcp_res(&(0x7f0000000180), 0x1f, 0x8) syz_open_pts() csource_test.go:119: 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 int inject_fault(int nth) { return 0; } static void setup_fault() { } #define BITMASK(bf_off,bf_len) (((1ull << (bf_len)) - 1) << (bf_off)) #define STORE_BY_BITMASK(type,htobe,addr,val,bf_off,bf_len) *(type*)(addr) = htobe((htobe(*(type*)(addr)) & ~BITMASK((bf_off), (bf_len))) | (((type)(val) << (bf_off)) & BITMASK((bf_off), (bf_len)))) struct csum_inet { uint32_t acc; }; static void csum_inet_init(struct csum_inet* csum) { csum->acc = 0; } static void csum_inet_update(struct csum_inet* csum, const uint8_t* data, size_t length) { if (length == 0) return; size_t i = 0; for (; i < length - 1; i += 2) csum->acc += *(uint16_t*)&data[i]; if (length & 1) csum->acc += le16toh((uint16_t)data[length - 1]); while (csum->acc > 0xffff) csum->acc = (csum->acc & 0xffff) + (csum->acc >> 16); } static uint16_t csum_inet_digest(struct csum_inet* csum) { return ~csum->acc; } #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[2] = {0xffffffffffffffff, 0xffffffffffffffff}; void execute_one(void) { intptr_t res = 0; inject_fault(1); syscall(SYS_ioctl, -1, 0x2000747bul, 0); memcpy((void*)0x20000000, "./file0\000", 8); res = syscall(SYS_openat, -1, 0x20000000ul, 0x80ul, 0x20ul); if (res != -1) r[0] = res; syscall(SYS_ioctl, r[0], 0x2000740dul, 0); *(uint32_t*)0x20000040 = 5; syscall(SYS_ioctl, r[0], 0x80047462ul, 0x20000040ul); *(uint32_t*)0x20000080 = 7; syscall(SYS_ioctl, r[0], 0x8004746cul, 0x20000080ul); memcpy((void*)0x200000c0, "/dev/wskbd\000", 11); res = syscall(SYS_openat, 0xffffffffffffff9cul, 0x200000c0ul, 0x80ul, 0ul); if (res != -1) r[1] = res; memcpy((void*)0x20000100, "./file0\000", 8); syscall(SYS_mkdirat, r[1], 0x20000100ul, 9ul); *(uint32_t*)0x20000140 = 0x101; syscall(SYS_ioctl, r[1], 0x8004746bul, 0x20000140ul); syscall(SYS_ioctl, r[1], 0x20007461ul, 0); syscall(SYS_ioctl, r[0], 0x40087468ul, 0x20000180ul); memcpy((void*)0x20000100, "\x36\x2e\x45\x0f\x18\x24\xce\x66\x40\x0f\x72\xd3\x00\x65\x66\x41\xd9\xed\xc4\x01\xfd\x10\x5b\x00\xc4\xa3\xc1\x7e\x3b\x00\xf2\x0f\x70\xb1\x00\x00\x00\x00\xb5\xc4\x62\x0d\x9f\xa4\x18\x11\x00\x00\x00\xf3\x46\x0f\x2c\x94\xe8\xec\x28\x00\x00\xf3\x0f\x1e\xed\x46\xe1\x10", 66); syz_execute_func(0x20000100); syz_open_pts(); } int main(void) { syscall(SYS_mmap, 0x20000000ul, 0x1000000ul, 3ul, 0x1012ul, -1, 0ul, 0ul); setup_fault(); use_temporary_dir(); do_sandbox_none(); return 0; } :106:13: error: unused function 'csum_inet_init' [-Werror,-Wunused-function] static void csum_inet_init(struct csum_inet* csum) ^ :111:13: error: unused function 'csum_inet_update' [-Werror,-Wunused-function] static void csum_inet_update(struct csum_inet* csum, const uint8_t* data, size_t length) ^ :124:17: error: unused function 'csum_inet_digest' [-Werror,-Wunused-function] static uint16_t csum_inet_digest(struct csum_inet* csum) ^ 3 errors generated. compiler invocation: c++ [-o /tmp/syz-executor658010073 -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 (2.06s) csource_test.go:118: opts: {Threaded:true Collide:true Repeat:true RepeatTimes:0 Procs:2 Slowdown:1 Sandbox:none Leak:false NetInjection:false NetDevices:false NetReset:false Cgroups:false BinfmtMisc:false CloseFDs:false KCSAN:false DevlinkPCI:false USB:false VhciInjection:false Wifi:false IEEE802154:false Sysctl:false UseTmpDir:true HandleSegv:false Repro:true Trace:false LegacyOptions:{Fault:false FaultCall:0 FaultNth:0}} program: ioctl$TIOCSBRK(0xffffffffffffffff, 0x2000747b) (fail_nth: 1) r0 = openat(0xffffffffffffffff, &(0x7f0000000000)='./file0\x00', 0x80, 0x20) ioctl$TIOCEXCL(r0, 0x2000740d) ioctl$TIOCCONS(r0, 0x80047462, &(0x7f0000000040)=0x5) ioctl$TIOCMBIS(r0, 0x8004746c, &(0x7f0000000080)=0x7) r1 = openat$wsmuxkbd(0xffffffffffffff9c, &(0x7f00000000c0), 0x80, 0x0) mkdirat(r1, &(0x7f0000000100)='./file0\x00', 0x9) ioctl$TIOCMBIC(r1, 0x8004746b, &(0x7f0000000140)=0x101) ioctl$TIOCSCTTY(r1, 0x20007461) ioctl$TIOCGWINSZ(r0, 0x40087468, &(0x7f0000000180)) syz_emit_ethernet(0xee, &(0x7f0000000000)={@empty, @remote, [], {@ipv6={0x86dd, {0x9, 0x6, "43f4aa", 0xb8, 0xff, 0x7f, @rand_addr="90d30d80c6d6830e89f4b2318b419ae5", @mcast1, {[@hopopts={0x29, 0x2, '\x00', [@pad1, @enc_lim, @ra={0x5, 0x2, 0x7f}, @pad1, @ra={0x5, 0x2, 0x9}]}, @routing={0x0, 0xa, 0x0, 0x40, 0x0, [@mcast1, @mcast1, @remote={0xfe, 0x80, '\x00', 0x0}, @remote={0xfe, 0x80, '\x00', 0x0}, @remote={0xfe, 0x80, '\x00', 0x0}]}, @routing={0x2, 0x4, 0x0, 0x9, 0x0, [@mcast2, @loopback]}], @icmpv6=@mld={0x83, 0x0, 0x0, 0x6, 0x0, @rand_addr="e8e6cb3cf819ff793d2471370fdbf3d9"}}}}}}) syz_execute_func(&(0x7f0000000100)="362e450f1824ce66400f72d300656641d9edc401fd105b00c4a3c17e3b00f20f70b100000000b5c4620d9fa41811000000f3460f2c94e8ec280000f30f1eed46e110") syz_extract_tcp_res(&(0x7f0000000180), 0x1f, 0x8) syz_open_pts() csource_test.go:119: 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 int inject_fault(int nth) { return 0; } static void setup_fault() { } static void thread_start(void* (*fn)(void*), void* arg) { pthread_t th; pthread_attr_t attr; pthread_attr_init(&attr); pthread_attr_setstacksize(&attr, 128 << 10); int i = 0; for (; i < 100; i++) { if (pthread_create(&th, &attr, fn, arg) == 0) { pthread_attr_destroy(&attr); return; } if (errno == EAGAIN) { usleep(50); continue; } break; } exit(1); } typedef struct { pthread_mutex_t mu; pthread_cond_t cv; int state; } event_t; static void event_init(event_t* ev) { if (pthread_mutex_init(&ev->mu, 0)) exit(1); if (pthread_cond_init(&ev->cv, 0)) exit(1); ev->state = 0; } static void event_reset(event_t* ev) { ev->state = 0; } static void event_set(event_t* ev) { pthread_mutex_lock(&ev->mu); if (ev->state) exit(1); ev->state = 1; pthread_mutex_unlock(&ev->mu); pthread_cond_broadcast(&ev->cv); } static void event_wait(event_t* ev) { pthread_mutex_lock(&ev->mu); while (!ev->state) pthread_cond_wait(&ev->cv, &ev->mu); pthread_mutex_unlock(&ev->mu); } static int event_isset(event_t* ev) { pthread_mutex_lock(&ev->mu); int res = ev->state; pthread_mutex_unlock(&ev->mu); return res; } static int event_timedwait(event_t* ev, uint64_t timeout) { uint64_t start = current_time_ms(); uint64_t now = start; pthread_mutex_lock(&ev->mu); for (;;) { if (ev->state) break; uint64_t remain = timeout - (now - start); struct timespec ts; ts.tv_sec = remain / 1000; ts.tv_nsec = (remain % 1000) * 1000 * 1000; pthread_cond_timedwait(&ev->cv, &ev->mu, &ts); now = current_time_ms(); if (now - start > timeout) break; } int res = ev->state; pthread_mutex_unlock(&ev->mu); return res; } #define BITMASK(bf_off,bf_len) (((1ull << (bf_len)) - 1) << (bf_off)) #define STORE_BY_BITMASK(type,htobe,addr,val,bf_off,bf_len) *(type*)(addr) = htobe((htobe(*(type*)(addr)) & ~BITMASK((bf_off), (bf_len))) | (((type)(val) << (bf_off)) & BITMASK((bf_off), (bf_len)))) struct csum_inet { uint32_t acc; }; static void csum_inet_init(struct csum_inet* csum) { csum->acc = 0; } static void csum_inet_update(struct csum_inet* csum, const uint8_t* data, size_t length) { if (length == 0) return; size_t i = 0; for (; i < length - 1; i += 2) csum->acc += *(uint16_t*)&data[i]; if (length & 1) csum->acc += le16toh((uint16_t)data[length - 1]); while (csum->acc > 0xffff) csum->acc = (csum->acc & 0xffff) + (csum->acc >> 16); } static uint16_t csum_inet_digest(struct csum_inet* csum) { return ~csum->acc; } #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[2] = {0xffffffffffffffff, 0xffffffffffffffff}; void execute_call(int call) { intptr_t res = 0; switch (call) { case 0: inject_fault(1); syscall(SYS_ioctl, -1, 0x2000747bul, 0); break; case 1: memcpy((void*)0x20000000, "./file0\000", 8); res = syscall(SYS_openat, -1, 0x20000000ul, 0x80ul, 0x20ul); if (res != -1) r[0] = res; break; case 2: syscall(SYS_ioctl, r[0], 0x2000740dul, 0); break; case 3: *(uint32_t*)0x20000040 = 5; syscall(SYS_ioctl, r[0], 0x80047462ul, 0x20000040ul); break; case 4: *(uint32_t*)0x20000080 = 7; syscall(SYS_ioctl, r[0], 0x8004746cul, 0x20000080ul); break; case 5: memcpy((void*)0x200000c0, "/dev/wskbd\000", 11); res = syscall(SYS_openat, 0xffffffffffffff9cul, 0x200000c0ul, 0x80ul, 0ul); if (res != -1) r[1] = res; break; case 6: memcpy((void*)0x20000100, "./file0\000", 8); syscall(SYS_mkdirat, r[1], 0x20000100ul, 9ul); break; case 7: *(uint32_t*)0x20000140 = 0x101; syscall(SYS_ioctl, r[1], 0x8004746bul, 0x20000140ul); break; case 8: syscall(SYS_ioctl, r[1], 0x20007461ul, 0); break; case 9: syscall(SYS_ioctl, r[0], 0x40087468ul, 0x20000180ul); break; case 10: memcpy((void*)0x20000100, "\x36\x2e\x45\x0f\x18\x24\xce\x66\x40\x0f\x72\xd3\x00\x65\x66\x41\xd9\xed\xc4\x01\xfd\x10\x5b\x00\xc4\xa3\xc1\x7e\x3b\x00\xf2\x0f\x70\xb1\x00\x00\x00\x00\xb5\xc4\x62\x0d\x9f\xa4\x18\x11\x00\x00\x00\xf3\x46\x0f\x2c\x94\xe8\xec\x28\x00\x00\xf3\x0f\x1e\xed\x46\xe1\x10", 66); syz_execute_func(0x20000100); break; case 11: syz_open_pts(); break; } } int main(void) { syscall(SYS_mmap, 0x20000000ul, 0x1000000ul, 3ul, 0x1012ul, -1, 0ul, 0ul); setup_fault(); for (procid = 0; procid < 2; procid++) { if (fork() == 0) { use_temporary_dir(); do_sandbox_none(); } } sleep(1000000); return 0; } :198:13: error: unused function 'csum_inet_init' [-Werror,-Wunused-function] static void csum_inet_init(struct csum_inet* csum) ^ :203:13: error: unused function 'csum_inet_update' [-Werror,-Wunused-function] static void csum_inet_update(struct csum_inet* csum, const uint8_t* data, size_t length) ^ :216:17: error: unused function 'csum_inet_digest' [-Werror,-Wunused-function] static uint16_t csum_inet_digest(struct csum_inet* csum) ^ 3 errors generated. compiler invocation: c++ [-o /tmp/syz-executor46824592 -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 (2.12s) csource_test.go:118: opts: {Threaded:true Collide:false Repeat:true RepeatTimes:0 Procs:0 Slowdown:1 Sandbox: Leak:false NetInjection:false NetDevices:false NetReset:false Cgroups:false BinfmtMisc:false CloseFDs:false KCSAN:false DevlinkPCI:false USB:false VhciInjection:false Wifi:false IEEE802154:false Sysctl:false UseTmpDir:true HandleSegv:false Repro:false Trace:false LegacyOptions:{Fault:false FaultCall:0 FaultNth:0}} program: ioctl$TIOCSBRK(0xffffffffffffffff, 0x2000747b) (fail_nth: 1) r0 = openat(0xffffffffffffffff, &(0x7f0000000000)='./file0\x00', 0x80, 0x20) ioctl$TIOCEXCL(r0, 0x2000740d) ioctl$TIOCCONS(r0, 0x80047462, &(0x7f0000000040)=0x5) ioctl$TIOCMBIS(r0, 0x8004746c, &(0x7f0000000080)=0x7) r1 = openat$wsmuxkbd(0xffffffffffffff9c, &(0x7f00000000c0), 0x80, 0x0) mkdirat(r1, &(0x7f0000000100)='./file0\x00', 0x9) ioctl$TIOCMBIC(r1, 0x8004746b, &(0x7f0000000140)=0x101) ioctl$TIOCSCTTY(r1, 0x20007461) ioctl$TIOCGWINSZ(r0, 0x40087468, &(0x7f0000000180)) syz_emit_ethernet(0xee, &(0x7f0000000000)={@empty, @remote, [], {@ipv6={0x86dd, {0x9, 0x6, "43f4aa", 0xb8, 0xff, 0x7f, @rand_addr="90d30d80c6d6830e89f4b2318b419ae5", @mcast1, {[@hopopts={0x29, 0x2, '\x00', [@pad1, @enc_lim, @ra={0x5, 0x2, 0x7f}, @pad1, @ra={0x5, 0x2, 0x9}]}, @routing={0x0, 0xa, 0x0, 0x40, 0x0, [@mcast1, @mcast1, @remote={0xfe, 0x80, '\x00', 0x0}, @remote={0xfe, 0x80, '\x00', 0x0}, @remote={0xfe, 0x80, '\x00', 0x0}]}, @routing={0x2, 0x4, 0x0, 0x9, 0x0, [@mcast2, @loopback]}], @icmpv6=@mld={0x83, 0x0, 0x0, 0x6, 0x0, @rand_addr="e8e6cb3cf819ff793d2471370fdbf3d9"}}}}}}) syz_execute_func(&(0x7f0000000100)="362e450f1824ce66400f72d300656641d9edc401fd105b00c4a3c17e3b00f20f70b100000000b5c4620d9fa41811000000f3460f2c94e8ec280000f30f1eed46e110") syz_extract_tcp_res(&(0x7f0000000180), 0x1f, 0x8) syz_open_pts() csource_test.go:119: 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 int inject_fault(int nth) { return 0; } static void setup_fault() { } static void thread_start(void* (*fn)(void*), void* arg) { pthread_t th; pthread_attr_t attr; pthread_attr_init(&attr); pthread_attr_setstacksize(&attr, 128 << 10); int i = 0; for (; i < 100; i++) { if (pthread_create(&th, &attr, fn, arg) == 0) { pthread_attr_destroy(&attr); return; } if (errno == EAGAIN) { usleep(50); continue; } break; } exit(1); } typedef struct { pthread_mutex_t mu; pthread_cond_t cv; int state; } event_t; static void event_init(event_t* ev) { if (pthread_mutex_init(&ev->mu, 0)) exit(1); if (pthread_cond_init(&ev->cv, 0)) exit(1); ev->state = 0; } static void event_reset(event_t* ev) { ev->state = 0; } static void event_set(event_t* ev) { pthread_mutex_lock(&ev->mu); if (ev->state) exit(1); ev->state = 1; pthread_mutex_unlock(&ev->mu); pthread_cond_broadcast(&ev->cv); } static void event_wait(event_t* ev) { pthread_mutex_lock(&ev->mu); while (!ev->state) pthread_cond_wait(&ev->cv, &ev->mu); pthread_mutex_unlock(&ev->mu); } static int event_isset(event_t* ev) { pthread_mutex_lock(&ev->mu); int res = ev->state; pthread_mutex_unlock(&ev->mu); return res; } static int event_timedwait(event_t* ev, uint64_t timeout) { uint64_t start = current_time_ms(); uint64_t now = start; pthread_mutex_lock(&ev->mu); for (;;) { if (ev->state) break; uint64_t remain = timeout - (now - start); struct timespec ts; ts.tv_sec = remain / 1000; ts.tv_nsec = (remain % 1000) * 1000 * 1000; pthread_cond_timedwait(&ev->cv, &ev->mu, &ts); now = current_time_ms(); if (now - start > timeout) break; } int res = ev->state; pthread_mutex_unlock(&ev->mu); return res; } #define BITMASK(bf_off,bf_len) (((1ull << (bf_len)) - 1) << (bf_off)) #define STORE_BY_BITMASK(type,htobe,addr,val,bf_off,bf_len) *(type*)(addr) = htobe((htobe(*(type*)(addr)) & ~BITMASK((bf_off), (bf_len))) | (((type)(val) << (bf_off)) & BITMASK((bf_off), (bf_len)))) struct csum_inet { uint32_t acc; }; static void csum_inet_init(struct csum_inet* csum) { csum->acc = 0; } static void csum_inet_update(struct csum_inet* csum, const uint8_t* data, size_t length) { if (length == 0) return; size_t i = 0; for (; i < length - 1; i += 2) csum->acc += *(uint16_t*)&data[i]; if (length & 1) csum->acc += le16toh((uint16_t)data[length - 1]); while (csum->acc > 0xffff) csum->acc = (csum->acc & 0xffff) + (csum->acc >> 16); } static uint16_t csum_inet_digest(struct csum_inet* csum) { return ~csum->acc; } #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[2] = {0xffffffffffffffff, 0xffffffffffffffff}; void execute_call(int call) { intptr_t res = 0; switch (call) { case 0: inject_fault(1); syscall(SYS_ioctl, -1, 0x2000747bul, 0); break; case 1: memcpy((void*)0x20000000, "./file0\000", 8); res = syscall(SYS_openat, -1, 0x20000000ul, 0x80ul, 0x20ul); if (res != -1) r[0] = res; break; case 2: syscall(SYS_ioctl, r[0], 0x2000740dul, 0); break; case 3: *(uint32_t*)0x20000040 = 5; syscall(SYS_ioctl, r[0], 0x80047462ul, 0x20000040ul); break; case 4: *(uint32_t*)0x20000080 = 7; syscall(SYS_ioctl, r[0], 0x8004746cul, 0x20000080ul); break; case 5: memcpy((void*)0x200000c0, "/dev/wskbd\000", 11); res = syscall(SYS_openat, 0xffffffffffffff9cul, 0x200000c0ul, 0x80ul, 0ul); if (res != -1) r[1] = res; break; case 6: memcpy((void*)0x20000100, "./file0\000", 8); syscall(SYS_mkdirat, r[1], 0x20000100ul, 9ul); break; case 7: *(uint32_t*)0x20000140 = 0x101; syscall(SYS_ioctl, r[1], 0x8004746bul, 0x20000140ul); break; case 8: syscall(SYS_ioctl, r[1], 0x20007461ul, 0); break; case 9: syscall(SYS_ioctl, r[0], 0x40087468ul, 0x20000180ul); break; case 10: memcpy((void*)0x20000100, "\x36\x2e\x45\x0f\x18\x24\xce\x66\x40\x0f\x72\xd3\x00\x65\x66\x41\xd9\xed\xc4\x01\xfd\x10\x5b\x00\xc4\xa3\xc1\x7e\x3b\x00\xf2\x0f\x70\xb1\x00\x00\x00\x00\xb5\xc4\x62\x0d\x9f\xa4\x18\x11\x00\x00\x00\xf3\x46\x0f\x2c\x94\xe8\xec\x28\x00\x00\xf3\x0f\x1e\xed\x46\xe1\x10", 66); syz_execute_func(0x20000100); break; case 11: syz_open_pts(); break; } } int main(void) { syscall(SYS_mmap, 0x20000000ul, 0x1000000ul, 3ul, 0x1012ul, -1, 0ul, 0ul); setup_fault(); use_temporary_dir(); loop(); return 0; } :195:13: error: unused function 'csum_inet_init' [-Werror,-Wunused-function] static void csum_inet_init(struct csum_inet* csum) ^ :200:13: error: unused function 'csum_inet_update' [-Werror,-Wunused-function] static void csum_inet_update(struct csum_inet* csum, const uint8_t* data, size_t length) ^ :213:17: error: unused function 'csum_inet_digest' [-Werror,-Wunused-function] static uint16_t csum_inet_digest(struct csum_inet* csum) ^ 3 errors generated. compiler invocation: c++ [-o /tmp/syz-executor1283272158 -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 (2.00s) csource_test.go:118: opts: {Threaded:true Collide:false Repeat:true RepeatTimes:0 Procs:0 Slowdown:1 Sandbox:none Leak:false NetInjection:false NetDevices:false NetReset:false Cgroups:false BinfmtMisc:false CloseFDs:false KCSAN:false DevlinkPCI:false USB:false VhciInjection:false Wifi:false IEEE802154:false Sysctl:false UseTmpDir:true HandleSegv:false Repro:false Trace:true LegacyOptions:{Fault:false FaultCall:0 FaultNth:0}} program: ioctl$TIOCSBRK(0xffffffffffffffff, 0x2000747b) (fail_nth: 1) r0 = openat(0xffffffffffffffff, &(0x7f0000000000)='./file0\x00', 0x80, 0x20) ioctl$TIOCEXCL(r0, 0x2000740d) ioctl$TIOCCONS(r0, 0x80047462, &(0x7f0000000040)=0x5) ioctl$TIOCMBIS(r0, 0x8004746c, &(0x7f0000000080)=0x7) r1 = openat$wsmuxkbd(0xffffffffffffff9c, &(0x7f00000000c0), 0x80, 0x0) mkdirat(r1, &(0x7f0000000100)='./file0\x00', 0x9) ioctl$TIOCMBIC(r1, 0x8004746b, &(0x7f0000000140)=0x101) ioctl$TIOCSCTTY(r1, 0x20007461) ioctl$TIOCGWINSZ(r0, 0x40087468, &(0x7f0000000180)) syz_emit_ethernet(0xee, &(0x7f0000000000)={@empty, @remote, [], {@ipv6={0x86dd, {0x9, 0x6, "43f4aa", 0xb8, 0xff, 0x7f, @rand_addr="90d30d80c6d6830e89f4b2318b419ae5", @mcast1, {[@hopopts={0x29, 0x2, '\x00', [@pad1, @enc_lim, @ra={0x5, 0x2, 0x7f}, @pad1, @ra={0x5, 0x2, 0x9}]}, @routing={0x0, 0xa, 0x0, 0x40, 0x0, [@mcast1, @mcast1, @remote={0xfe, 0x80, '\x00', 0x0}, @remote={0xfe, 0x80, '\x00', 0x0}, @remote={0xfe, 0x80, '\x00', 0x0}]}, @routing={0x2, 0x4, 0x0, 0x9, 0x0, [@mcast2, @loopback]}], @icmpv6=@mld={0x83, 0x0, 0x0, 0x6, 0x0, @rand_addr="e8e6cb3cf819ff793d2471370fdbf3d9"}}}}}}) syz_execute_func(&(0x7f0000000100)="362e450f1824ce66400f72d300656641d9edc401fd105b00c4a3c17e3b00f20f70b100000000b5c4620d9fa41811000000f3460f2c94e8ec280000f30f1eed46e110") syz_extract_tcp_res(&(0x7f0000000180), 0x1f, 0x8) syz_open_pts() csource_test.go:119: 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 int inject_fault(int nth) { return 0; } static void setup_fault() { } static void thread_start(void* (*fn)(void*), void* arg) { pthread_t th; pthread_attr_t attr; pthread_attr_init(&attr); pthread_attr_setstacksize(&attr, 128 << 10); int i = 0; for (; i < 100; i++) { if (pthread_create(&th, &attr, fn, arg) == 0) { pthread_attr_destroy(&attr); return; } if (errno == EAGAIN) { usleep(50); continue; } break; } exit(1); } typedef struct { pthread_mutex_t mu; pthread_cond_t cv; int state; } event_t; static void event_init(event_t* ev) { if (pthread_mutex_init(&ev->mu, 0)) exit(1); if (pthread_cond_init(&ev->cv, 0)) exit(1); ev->state = 0; } static void event_reset(event_t* ev) { ev->state = 0; } static void event_set(event_t* ev) { pthread_mutex_lock(&ev->mu); if (ev->state) exit(1); ev->state = 1; pthread_mutex_unlock(&ev->mu); pthread_cond_broadcast(&ev->cv); } static void event_wait(event_t* ev) { pthread_mutex_lock(&ev->mu); while (!ev->state) pthread_cond_wait(&ev->cv, &ev->mu); pthread_mutex_unlock(&ev->mu); } static int event_isset(event_t* ev) { pthread_mutex_lock(&ev->mu); int res = ev->state; pthread_mutex_unlock(&ev->mu); return res; } static int event_timedwait(event_t* ev, uint64_t timeout) { uint64_t start = current_time_ms(); uint64_t now = start; pthread_mutex_lock(&ev->mu); for (;;) { if (ev->state) break; uint64_t remain = timeout - (now - start); struct timespec ts; ts.tv_sec = remain / 1000; ts.tv_nsec = (remain % 1000) * 1000 * 1000; pthread_cond_timedwait(&ev->cv, &ev->mu, &ts); now = current_time_ms(); if (now - start > timeout) break; } int res = ev->state; pthread_mutex_unlock(&ev->mu); return res; } #define BITMASK(bf_off,bf_len) (((1ull << (bf_len)) - 1) << (bf_off)) #define STORE_BY_BITMASK(type,htobe,addr,val,bf_off,bf_len) *(type*)(addr) = htobe((htobe(*(type*)(addr)) & ~BITMASK((bf_off), (bf_len))) | (((type)(val) << (bf_off)) & BITMASK((bf_off), (bf_len)))) struct csum_inet { uint32_t acc; }; static void csum_inet_init(struct csum_inet* csum) { csum->acc = 0; } static void csum_inet_update(struct csum_inet* csum, const uint8_t* data, size_t length) { if (length == 0) return; size_t i = 0; for (; i < length - 1; i += 2) csum->acc += *(uint16_t*)&data[i]; if (length & 1) csum->acc += le16toh((uint16_t)data[length - 1]); while (csum->acc > 0xffff) csum->acc = (csum->acc & 0xffff) + (csum->acc >> 16); } static uint16_t csum_inet_digest(struct csum_inet* csum) { return ~csum->acc; } #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[2] = {0xffffffffffffffff, 0xffffffffffffffff}; void execute_call(int call) { intptr_t res = 0; switch (call) { case 0: inject_fault(1); res = syscall(SYS_ioctl, -1, 0x2000747bul, 0); fprintf(stderr, "### call=0 errno=%u\n", res == -1 ? errno : 0); break; case 1: memcpy((void*)0x20000000, "./file0\000", 8); res = syscall(SYS_openat, -1, 0x20000000ul, 0x80ul, 0x20ul); fprintf(stderr, "### call=1 errno=%u\n", res == -1 ? errno : 0); if (res != -1) r[0] = res; break; case 2: res = syscall(SYS_ioctl, r[0], 0x2000740dul, 0); fprintf(stderr, "### call=2 errno=%u\n", res == -1 ? errno : 0); break; case 3: *(uint32_t*)0x20000040 = 5; res = syscall(SYS_ioctl, r[0], 0x80047462ul, 0x20000040ul); fprintf(stderr, "### call=3 errno=%u\n", res == -1 ? errno : 0); break; case 4: *(uint32_t*)0x20000080 = 7; res = syscall(SYS_ioctl, r[0], 0x8004746cul, 0x20000080ul); fprintf(stderr, "### call=4 errno=%u\n", res == -1 ? errno : 0); break; case 5: memcpy((void*)0x200000c0, "/dev/wskbd\000", 11); res = syscall(SYS_openat, 0xffffffffffffff9cul, 0x200000c0ul, 0x80ul, 0ul); fprintf(stderr, "### call=5 errno=%u\n", res == -1 ? errno : 0); if (res != -1) r[1] = res; break; case 6: memcpy((void*)0x20000100, "./file0\000", 8); res = syscall(SYS_mkdirat, r[1], 0x20000100ul, 9ul); fprintf(stderr, "### call=6 errno=%u\n", res == -1 ? errno : 0); break; case 7: *(uint32_t*)0x20000140 = 0x101; res = syscall(SYS_ioctl, r[1], 0x8004746bul, 0x20000140ul); fprintf(stderr, "### call=7 errno=%u\n", res == -1 ? errno : 0); break; case 8: res = syscall(SYS_ioctl, r[1], 0x20007461ul, 0); fprintf(stderr, "### call=8 errno=%u\n", res == -1 ? errno : 0); break; case 9: res = syscall(SYS_ioctl, r[0], 0x40087468ul, 0x20000180ul); fprintf(stderr, "### call=9 errno=%u\n", res == -1 ? errno : 0); break; case 10: memcpy((void*)0x20000100, "\x36\x2e\x45\x0f\x18\x24\xce\x66\x40\x0f\x72\xd3\x00\x65\x66\x41\xd9\xed\xc4\x01\xfd\x10\x5b\x00\xc4\xa3\xc1\x7e\x3b\x00\xf2\x0f\x70\xb1\x00\x00\x00\x00\xb5\xc4\x62\x0d\x9f\xa4\x18\x11\x00\x00\x00\xf3\x46\x0f\x2c\x94\xe8\xec\x28\x00\x00\xf3\x0f\x1e\xed\x46\xe1\x10", 66); res = -1; errno = EFAULT; res = syz_execute_func(0x20000100); fprintf(stderr, "### call=10 errno=%u\n", res == -1 ? errno : 0); break; case 11: res = -1; errno = EFAULT; res = syz_open_pts(); fprintf(stderr, "### call=11 errno=%u\n", res == -1 ? errno : 0); break; } } int main(void) { syscall(SYS_mmap, 0x20000000ul, 0x1000000ul, 3ul, 0x1012ul, -1, 0ul, 0ul); setup_fault(); use_temporary_dir(); do_sandbox_none(); return 0; } :196:13: error: unused function 'csum_inet_init' [-Werror,-Wunused-function] static void csum_inet_init(struct csum_inet* csum) ^ :201:13: error: unused function 'csum_inet_update' [-Werror,-Wunused-function] static void csum_inet_update(struct csum_inet* csum, const uint8_t* data, size_t length) ^ :214:17: error: unused function 'csum_inet_digest' [-Werror,-Wunused-function] static uint16_t csum_inet_digest(struct csum_inet* csum) ^ 3 errors generated. compiler invocation: c++ [-o /tmp/syz-executor358505133 -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 (1.50s) csource_test.go:118: opts: {Threaded:true Collide:false Repeat:true RepeatTimes:0 Procs:0 Slowdown:1 Sandbox:setuid Leak:false NetInjection:false NetDevices:false NetReset:false Cgroups:false BinfmtMisc:false CloseFDs:false KCSAN:false DevlinkPCI:false USB:false VhciInjection:false Wifi:false IEEE802154:false Sysctl:false UseTmpDir:true HandleSegv:false Repro:false Trace:false LegacyOptions:{Fault:false FaultCall:0 FaultNth:0}} program: ioctl$TIOCSBRK(0xffffffffffffffff, 0x2000747b) (fail_nth: 1) r0 = openat(0xffffffffffffffff, &(0x7f0000000000)='./file0\x00', 0x80, 0x20) ioctl$TIOCEXCL(r0, 0x2000740d) ioctl$TIOCCONS(r0, 0x80047462, &(0x7f0000000040)=0x5) ioctl$TIOCMBIS(r0, 0x8004746c, &(0x7f0000000080)=0x7) r1 = openat$wsmuxkbd(0xffffffffffffff9c, &(0x7f00000000c0), 0x80, 0x0) mkdirat(r1, &(0x7f0000000100)='./file0\x00', 0x9) ioctl$TIOCMBIC(r1, 0x8004746b, &(0x7f0000000140)=0x101) ioctl$TIOCSCTTY(r1, 0x20007461) ioctl$TIOCGWINSZ(r0, 0x40087468, &(0x7f0000000180)) syz_emit_ethernet(0xee, &(0x7f0000000000)={@empty, @remote, [], {@ipv6={0x86dd, {0x9, 0x6, "43f4aa", 0xb8, 0xff, 0x7f, @rand_addr="90d30d80c6d6830e89f4b2318b419ae5", @mcast1, {[@hopopts={0x29, 0x2, '\x00', [@pad1, @enc_lim, @ra={0x5, 0x2, 0x7f}, @pad1, @ra={0x5, 0x2, 0x9}]}, @routing={0x0, 0xa, 0x0, 0x40, 0x0, [@mcast1, @mcast1, @remote={0xfe, 0x80, '\x00', 0x0}, @remote={0xfe, 0x80, '\x00', 0x0}, @remote={0xfe, 0x80, '\x00', 0x0}]}, @routing={0x2, 0x4, 0x0, 0x9, 0x0, [@mcast2, @loopback]}], @icmpv6=@mld={0x83, 0x0, 0x0, 0x6, 0x0, @rand_addr="e8e6cb3cf819ff793d2471370fdbf3d9"}}}}}}) syz_execute_func(&(0x7f0000000100)="362e450f1824ce66400f72d300656641d9edc401fd105b00c4a3c17e3b00f20f70b100000000b5c4620d9fa41811000000f3460f2c94e8ec280000f30f1eed46e110") syz_extract_tcp_res(&(0x7f0000000180), 0x1f, 0x8) syz_open_pts() csource_test.go:119: 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 int inject_fault(int nth) { return 0; } static void setup_fault() { } static void thread_start(void* (*fn)(void*), void* arg) { pthread_t th; pthread_attr_t attr; pthread_attr_init(&attr); pthread_attr_setstacksize(&attr, 128 << 10); int i = 0; for (; i < 100; i++) { if (pthread_create(&th, &attr, fn, arg) == 0) { pthread_attr_destroy(&attr); return; } if (errno == EAGAIN) { usleep(50); continue; } break; } exit(1); } typedef struct { pthread_mutex_t mu; pthread_cond_t cv; int state; } event_t; static void event_init(event_t* ev) { if (pthread_mutex_init(&ev->mu, 0)) exit(1); if (pthread_cond_init(&ev->cv, 0)) exit(1); ev->state = 0; } static void event_reset(event_t* ev) { ev->state = 0; } static void event_set(event_t* ev) { pthread_mutex_lock(&ev->mu); if (ev->state) exit(1); ev->state = 1; pthread_mutex_unlock(&ev->mu); pthread_cond_broadcast(&ev->cv); } static void event_wait(event_t* ev) { pthread_mutex_lock(&ev->mu); while (!ev->state) pthread_cond_wait(&ev->cv, &ev->mu); pthread_mutex_unlock(&ev->mu); } static int event_isset(event_t* ev) { pthread_mutex_lock(&ev->mu); int res = ev->state; pthread_mutex_unlock(&ev->mu); return res; } static int event_timedwait(event_t* ev, uint64_t timeout) { uint64_t start = current_time_ms(); uint64_t now = start; pthread_mutex_lock(&ev->mu); for (;;) { if (ev->state) break; uint64_t remain = timeout - (now - start); struct timespec ts; ts.tv_sec = remain / 1000; ts.tv_nsec = (remain % 1000) * 1000 * 1000; pthread_cond_timedwait(&ev->cv, &ev->mu, &ts); now = current_time_ms(); if (now - start > timeout) break; } int res = ev->state; pthread_mutex_unlock(&ev->mu); return res; } #define BITMASK(bf_off,bf_len) (((1ull << (bf_len)) - 1) << (bf_off)) #define STORE_BY_BITMASK(type,htobe,addr,val,bf_off,bf_len) *(type*)(addr) = htobe((htobe(*(type*)(addr)) & ~BITMASK((bf_off), (bf_len))) | (((type)(val) << (bf_off)) & BITMASK((bf_off), (bf_len)))) struct csum_inet { uint32_t acc; }; static void csum_inet_init(struct csum_inet* csum) { csum->acc = 0; } static void csum_inet_update(struct csum_inet* csum, const uint8_t* data, size_t length) { if (length == 0) return; size_t i = 0; for (; i < length - 1; i += 2) csum->acc += *(uint16_t*)&data[i]; if (length & 1) csum->acc += le16toh((uint16_t)data[length - 1]); while (csum->acc > 0xffff) csum->acc = (csum->acc & 0xffff) + (csum->acc >> 16); } static uint16_t csum_inet_digest(struct csum_inet* csum) { return ~csum->acc; } #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[2] = {0xffffffffffffffff, 0xffffffffffffffff}; void execute_call(int call) { intptr_t res = 0; switch (call) { case 0: inject_fault(1); syscall(SYS_ioctl, -1, 0x2000747bul, 0); break; case 1: memcpy((void*)0x20000000, "./file0\000", 8); res = syscall(SYS_openat, -1, 0x20000000ul, 0x80ul, 0x20ul); if (res != -1) r[0] = res; break; case 2: syscall(SYS_ioctl, r[0], 0x2000740dul, 0); break; case 3: *(uint32_t*)0x20000040 = 5; syscall(SYS_ioctl, r[0], 0x80047462ul, 0x20000040ul); break; case 4: *(uint32_t*)0x20000080 = 7; syscall(SYS_ioctl, r[0], 0x8004746cul, 0x20000080ul); break; case 5: memcpy((void*)0x200000c0, "/dev/wskbd\000", 11); res = syscall(SYS_openat, 0xffffffffffffff9cul, 0x200000c0ul, 0x80ul, 0ul); if (res != -1) r[1] = res; break; case 6: memcpy((void*)0x20000100, "./file0\000", 8); syscall(SYS_mkdirat, r[1], 0x20000100ul, 9ul); break; case 7: *(uint32_t*)0x20000140 = 0x101; syscall(SYS_ioctl, r[1], 0x8004746bul, 0x20000140ul); break; case 8: syscall(SYS_ioctl, r[1], 0x20007461ul, 0); break; case 9: syscall(SYS_ioctl, r[0], 0x40087468ul, 0x20000180ul); break; case 10: memcpy((void*)0x20000100, "\x36\x2e\x45\x0f\x18\x24\xce\x66\x40\x0f\x72\xd3\x00\x65\x66\x41\xd9\xed\xc4\x01\xfd\x10\x5b\x00\xc4\xa3\xc1\x7e\x3b\x00\xf2\x0f\x70\xb1\x00\x00\x00\x00\xb5\xc4\x62\x0d\x9f\xa4\x18\x11\x00\x00\x00\xf3\x46\x0f\x2c\x94\xe8\xec\x28\x00\x00\xf3\x0f\x1e\xed\x46\xe1\x10", 66); syz_execute_func(0x20000100); break; case 11: syz_open_pts(); break; } } int main(void) { syscall(SYS_mmap, 0x20000000ul, 0x1000000ul, 3ul, 0x1012ul, -1, 0ul, 0ul); setup_fault(); use_temporary_dir(); do_sandbox_setuid(); return 0; } :196:13: error: unused function 'csum_inet_init' [-Werror,-Wunused-function] static void csum_inet_init(struct csum_inet* csum) ^ :201:13: error: unused function 'csum_inet_update' [-Werror,-Wunused-function] static void csum_inet_update(struct csum_inet* csum, const uint8_t* data, size_t length) ^ :214:17: error: unused function 'csum_inet_digest' [-Werror,-Wunused-function] static uint16_t csum_inet_digest(struct csum_inet* csum) ^ 3 errors generated. compiler invocation: c++ [-o /tmp/syz-executor522938144 -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 (1.97s) csource_test.go:118: opts: {Threaded:true Collide:false Repeat:true RepeatTimes:0 Procs:0 Slowdown:1 Sandbox:none Leak:false NetInjection:false NetDevices:false NetReset:false Cgroups:false BinfmtMisc:false CloseFDs:false KCSAN:false DevlinkPCI:false USB:false VhciInjection:false Wifi:false IEEE802154:false Sysctl:false UseTmpDir:false HandleSegv:false Repro:false Trace:false LegacyOptions:{Fault:false FaultCall:0 FaultNth:0}} program: ioctl$TIOCSBRK(0xffffffffffffffff, 0x2000747b) (fail_nth: 1) r0 = openat(0xffffffffffffffff, &(0x7f0000000000)='./file0\x00', 0x80, 0x20) ioctl$TIOCEXCL(r0, 0x2000740d) ioctl$TIOCCONS(r0, 0x80047462, &(0x7f0000000040)=0x5) ioctl$TIOCMBIS(r0, 0x8004746c, &(0x7f0000000080)=0x7) r1 = openat$wsmuxkbd(0xffffffffffffff9c, &(0x7f00000000c0), 0x80, 0x0) mkdirat(r1, &(0x7f0000000100)='./file0\x00', 0x9) ioctl$TIOCMBIC(r1, 0x8004746b, &(0x7f0000000140)=0x101) ioctl$TIOCSCTTY(r1, 0x20007461) ioctl$TIOCGWINSZ(r0, 0x40087468, &(0x7f0000000180)) syz_emit_ethernet(0xee, &(0x7f0000000000)={@empty, @remote, [], {@ipv6={0x86dd, {0x9, 0x6, "43f4aa", 0xb8, 0xff, 0x7f, @rand_addr="90d30d80c6d6830e89f4b2318b419ae5", @mcast1, {[@hopopts={0x29, 0x2, '\x00', [@pad1, @enc_lim, @ra={0x5, 0x2, 0x7f}, @pad1, @ra={0x5, 0x2, 0x9}]}, @routing={0x0, 0xa, 0x0, 0x40, 0x0, [@mcast1, @mcast1, @remote={0xfe, 0x80, '\x00', 0x0}, @remote={0xfe, 0x80, '\x00', 0x0}, @remote={0xfe, 0x80, '\x00', 0x0}]}, @routing={0x2, 0x4, 0x0, 0x9, 0x0, [@mcast2, @loopback]}], @icmpv6=@mld={0x83, 0x0, 0x0, 0x6, 0x0, @rand_addr="e8e6cb3cf819ff793d2471370fdbf3d9"}}}}}}) syz_execute_func(&(0x7f0000000100)="362e450f1824ce66400f72d300656641d9edc401fd105b00c4a3c17e3b00f20f70b100000000b5c4620d9fa41811000000f3460f2c94e8ec280000f30f1eed46e110") syz_extract_tcp_res(&(0x7f0000000180), 0x1f, 0x8) syz_open_pts() csource_test.go:119: 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 int inject_fault(int nth) { return 0; } static void setup_fault() { } static void thread_start(void* (*fn)(void*), void* arg) { pthread_t th; pthread_attr_t attr; pthread_attr_init(&attr); pthread_attr_setstacksize(&attr, 128 << 10); int i = 0; for (; i < 100; i++) { if (pthread_create(&th, &attr, fn, arg) == 0) { pthread_attr_destroy(&attr); return; } if (errno == EAGAIN) { usleep(50); continue; } break; } exit(1); } typedef struct { pthread_mutex_t mu; pthread_cond_t cv; int state; } event_t; static void event_init(event_t* ev) { if (pthread_mutex_init(&ev->mu, 0)) exit(1); if (pthread_cond_init(&ev->cv, 0)) exit(1); ev->state = 0; } static void event_reset(event_t* ev) { ev->state = 0; } static void event_set(event_t* ev) { pthread_mutex_lock(&ev->mu); if (ev->state) exit(1); ev->state = 1; pthread_mutex_unlock(&ev->mu); pthread_cond_broadcast(&ev->cv); } static void event_wait(event_t* ev) { pthread_mutex_lock(&ev->mu); while (!ev->state) pthread_cond_wait(&ev->cv, &ev->mu); pthread_mutex_unlock(&ev->mu); } static int event_isset(event_t* ev) { pthread_mutex_lock(&ev->mu); int res = ev->state; pthread_mutex_unlock(&ev->mu); return res; } static int event_timedwait(event_t* ev, uint64_t timeout) { uint64_t start = current_time_ms(); uint64_t now = start; pthread_mutex_lock(&ev->mu); for (;;) { if (ev->state) break; uint64_t remain = timeout - (now - start); struct timespec ts; ts.tv_sec = remain / 1000; ts.tv_nsec = (remain % 1000) * 1000 * 1000; pthread_cond_timedwait(&ev->cv, &ev->mu, &ts); now = current_time_ms(); if (now - start > timeout) break; } int res = ev->state; pthread_mutex_unlock(&ev->mu); return res; } #define BITMASK(bf_off,bf_len) (((1ull << (bf_len)) - 1) << (bf_off)) #define STORE_BY_BITMASK(type,htobe,addr,val,bf_off,bf_len) *(type*)(addr) = htobe((htobe(*(type*)(addr)) & ~BITMASK((bf_off), (bf_len))) | (((type)(val) << (bf_off)) & BITMASK((bf_off), (bf_len)))) struct csum_inet { uint32_t acc; }; static void csum_inet_init(struct csum_inet* csum) { csum->acc = 0; } static void csum_inet_update(struct csum_inet* csum, const uint8_t* data, size_t length) { if (length == 0) return; size_t i = 0; for (; i < length - 1; i += 2) csum->acc += *(uint16_t*)&data[i]; if (length & 1) csum->acc += le16toh((uint16_t)data[length - 1]); while (csum->acc > 0xffff) csum->acc = (csum->acc & 0xffff) + (csum->acc >> 16); } static uint16_t csum_inet_digest(struct csum_inet* csum) { return ~csum->acc; } #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[2] = {0xffffffffffffffff, 0xffffffffffffffff}; void execute_call(int call) { intptr_t res = 0; switch (call) { case 0: inject_fault(1); syscall(SYS_ioctl, -1, 0x2000747bul, 0); break; case 1: memcpy((void*)0x20000000, "./file0\000", 8); res = syscall(SYS_openat, -1, 0x20000000ul, 0x80ul, 0x20ul); if (res != -1) r[0] = res; break; case 2: syscall(SYS_ioctl, r[0], 0x2000740dul, 0); break; case 3: *(uint32_t*)0x20000040 = 5; syscall(SYS_ioctl, r[0], 0x80047462ul, 0x20000040ul); break; case 4: *(uint32_t*)0x20000080 = 7; syscall(SYS_ioctl, r[0], 0x8004746cul, 0x20000080ul); break; case 5: memcpy((void*)0x200000c0, "/dev/wskbd\000", 11); res = syscall(SYS_openat, 0xffffffffffffff9cul, 0x200000c0ul, 0x80ul, 0ul); if (res != -1) r[1] = res; break; case 6: memcpy((void*)0x20000100, "./file0\000", 8); syscall(SYS_mkdirat, r[1], 0x20000100ul, 9ul); break; case 7: *(uint32_t*)0x20000140 = 0x101; syscall(SYS_ioctl, r[1], 0x8004746bul, 0x20000140ul); break; case 8: syscall(SYS_ioctl, r[1], 0x20007461ul, 0); break; case 9: syscall(SYS_ioctl, r[0], 0x40087468ul, 0x20000180ul); break; case 10: memcpy((void*)0x20000100, "\x36\x2e\x45\x0f\x18\x24\xce\x66\x40\x0f\x72\xd3\x00\x65\x66\x41\xd9\xed\xc4\x01\xfd\x10\x5b\x00\xc4\xa3\xc1\x7e\x3b\x00\xf2\x0f\x70\xb1\x00\x00\x00\x00\xb5\xc4\x62\x0d\x9f\xa4\x18\x11\x00\x00\x00\xf3\x46\x0f\x2c\x94\xe8\xec\x28\x00\x00\xf3\x0f\x1e\xed\x46\xe1\x10", 66); syz_execute_func(0x20000100); break; case 11: syz_open_pts(); break; } } int main(void) { syscall(SYS_mmap, 0x20000000ul, 0x1000000ul, 3ul, 0x1012ul, -1, 0ul, 0ul); setup_fault(); do_sandbox_none(); return 0; } :150:13: error: unused function 'csum_inet_init' [-Werror,-Wunused-function] static void csum_inet_init(struct csum_inet* csum) ^ :155:13: error: unused function 'csum_inet_update' [-Werror,-Wunused-function] static void csum_inet_update(struct csum_inet* csum, const uint8_t* data, size_t length) ^ :168:17: error: unused function 'csum_inet_digest' [-Werror,-Wunused-function] static uint16_t csum_inet_digest(struct csum_inet* csum) ^ 3 errors generated. compiler invocation: c++ [-o /tmp/syz-executor3591704663 -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 (2.06s) csource_test.go:118: opts: {Threaded:true Collide:false Repeat:true RepeatTimes:0 Procs:0 Slowdown:1 Sandbox:none Leak:false NetInjection:false NetDevices:false NetReset:false Cgroups:false BinfmtMisc:false CloseFDs:false KCSAN:false DevlinkPCI:false USB:false VhciInjection:false Wifi:false IEEE802154:false Sysctl:false UseTmpDir:true HandleSegv:false Repro:true Trace:false LegacyOptions:{Fault:false FaultCall:0 FaultNth:0}} program: ioctl$TIOCSBRK(0xffffffffffffffff, 0x2000747b) (fail_nth: 1) r0 = openat(0xffffffffffffffff, &(0x7f0000000000)='./file0\x00', 0x80, 0x20) ioctl$TIOCEXCL(r0, 0x2000740d) ioctl$TIOCCONS(r0, 0x80047462, &(0x7f0000000040)=0x5) ioctl$TIOCMBIS(r0, 0x8004746c, &(0x7f0000000080)=0x7) r1 = openat$wsmuxkbd(0xffffffffffffff9c, &(0x7f00000000c0), 0x80, 0x0) mkdirat(r1, &(0x7f0000000100)='./file0\x00', 0x9) ioctl$TIOCMBIC(r1, 0x8004746b, &(0x7f0000000140)=0x101) ioctl$TIOCSCTTY(r1, 0x20007461) ioctl$TIOCGWINSZ(r0, 0x40087468, &(0x7f0000000180)) syz_emit_ethernet(0xee, &(0x7f0000000000)={@empty, @remote, [], {@ipv6={0x86dd, {0x9, 0x6, "43f4aa", 0xb8, 0xff, 0x7f, @rand_addr="90d30d80c6d6830e89f4b2318b419ae5", @mcast1, {[@hopopts={0x29, 0x2, '\x00', [@pad1, @enc_lim, @ra={0x5, 0x2, 0x7f}, @pad1, @ra={0x5, 0x2, 0x9}]}, @routing={0x0, 0xa, 0x0, 0x40, 0x0, [@mcast1, @mcast1, @remote={0xfe, 0x80, '\x00', 0x0}, @remote={0xfe, 0x80, '\x00', 0x0}, @remote={0xfe, 0x80, '\x00', 0x0}]}, @routing={0x2, 0x4, 0x0, 0x9, 0x0, [@mcast2, @loopback]}], @icmpv6=@mld={0x83, 0x0, 0x0, 0x6, 0x0, @rand_addr="e8e6cb3cf819ff793d2471370fdbf3d9"}}}}}}) syz_execute_func(&(0x7f0000000100)="362e450f1824ce66400f72d300656641d9edc401fd105b00c4a3c17e3b00f20f70b100000000b5c4620d9fa41811000000f3460f2c94e8ec280000f30f1eed46e110") syz_extract_tcp_res(&(0x7f0000000180), 0x1f, 0x8) syz_open_pts() csource_test.go:119: 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 int inject_fault(int nth) { return 0; } static void setup_fault() { } static void thread_start(void* (*fn)(void*), void* arg) { pthread_t th; pthread_attr_t attr; pthread_attr_init(&attr); pthread_attr_setstacksize(&attr, 128 << 10); int i = 0; for (; i < 100; i++) { if (pthread_create(&th, &attr, fn, arg) == 0) { pthread_attr_destroy(&attr); return; } if (errno == EAGAIN) { usleep(50); continue; } break; } exit(1); } typedef struct { pthread_mutex_t mu; pthread_cond_t cv; int state; } event_t; static void event_init(event_t* ev) { if (pthread_mutex_init(&ev->mu, 0)) exit(1); if (pthread_cond_init(&ev->cv, 0)) exit(1); ev->state = 0; } static void event_reset(event_t* ev) { ev->state = 0; } static void event_set(event_t* ev) { pthread_mutex_lock(&ev->mu); if (ev->state) exit(1); ev->state = 1; pthread_mutex_unlock(&ev->mu); pthread_cond_broadcast(&ev->cv); } static void event_wait(event_t* ev) { pthread_mutex_lock(&ev->mu); while (!ev->state) pthread_cond_wait(&ev->cv, &ev->mu); pthread_mutex_unlock(&ev->mu); } static int event_isset(event_t* ev) { pthread_mutex_lock(&ev->mu); int res = ev->state; pthread_mutex_unlock(&ev->mu); return res; } static int event_timedwait(event_t* ev, uint64_t timeout) { uint64_t start = current_time_ms(); uint64_t now = start; pthread_mutex_lock(&ev->mu); for (;;) { if (ev->state) break; uint64_t remain = timeout - (now - start); struct timespec ts; ts.tv_sec = remain / 1000; ts.tv_nsec = (remain % 1000) * 1000 * 1000; pthread_cond_timedwait(&ev->cv, &ev->mu, &ts); now = current_time_ms(); if (now - start > timeout) break; } int res = ev->state; pthread_mutex_unlock(&ev->mu); return res; } #define BITMASK(bf_off,bf_len) (((1ull << (bf_len)) - 1) << (bf_off)) #define STORE_BY_BITMASK(type,htobe,addr,val,bf_off,bf_len) *(type*)(addr) = htobe((htobe(*(type*)(addr)) & ~BITMASK((bf_off), (bf_len))) | (((type)(val) << (bf_off)) & BITMASK((bf_off), (bf_len)))) struct csum_inet { uint32_t acc; }; static void csum_inet_init(struct csum_inet* csum) { csum->acc = 0; } static void csum_inet_update(struct csum_inet* csum, const uint8_t* data, size_t length) { if (length == 0) return; size_t i = 0; for (; i < length - 1; i += 2) csum->acc += *(uint16_t*)&data[i]; if (length & 1) csum->acc += le16toh((uint16_t)data[length - 1]); while (csum->acc > 0xffff) csum->acc = (csum->acc & 0xffff) + (csum->acc >> 16); } static uint16_t csum_inet_digest(struct csum_inet* csum) { return ~csum->acc; } #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[2] = {0xffffffffffffffff, 0xffffffffffffffff}; void execute_call(int call) { intptr_t res = 0; switch (call) { case 0: inject_fault(1); syscall(SYS_ioctl, -1, 0x2000747bul, 0); break; case 1: memcpy((void*)0x20000000, "./file0\000", 8); res = syscall(SYS_openat, -1, 0x20000000ul, 0x80ul, 0x20ul); if (res != -1) r[0] = res; break; case 2: syscall(SYS_ioctl, r[0], 0x2000740dul, 0); break; case 3: *(uint32_t*)0x20000040 = 5; syscall(SYS_ioctl, r[0], 0x80047462ul, 0x20000040ul); break; case 4: *(uint32_t*)0x20000080 = 7; syscall(SYS_ioctl, r[0], 0x8004746cul, 0x20000080ul); break; case 5: memcpy((void*)0x200000c0, "/dev/wskbd\000", 11); res = syscall(SYS_openat, 0xffffffffffffff9cul, 0x200000c0ul, 0x80ul, 0ul); if (res != -1) r[1] = res; break; case 6: memcpy((void*)0x20000100, "./file0\000", 8); syscall(SYS_mkdirat, r[1], 0x20000100ul, 9ul); break; case 7: *(uint32_t*)0x20000140 = 0x101; syscall(SYS_ioctl, r[1], 0x8004746bul, 0x20000140ul); break; case 8: syscall(SYS_ioctl, r[1], 0x20007461ul, 0); break; case 9: syscall(SYS_ioctl, r[0], 0x40087468ul, 0x20000180ul); break; case 10: memcpy((void*)0x20000100, "\x36\x2e\x45\x0f\x18\x24\xce\x66\x40\x0f\x72\xd3\x00\x65\x66\x41\xd9\xed\xc4\x01\xfd\x10\x5b\x00\xc4\xa3\xc1\x7e\x3b\x00\xf2\x0f\x70\xb1\x00\x00\x00\x00\xb5\xc4\x62\x0d\x9f\xa4\x18\x11\x00\x00\x00\xf3\x46\x0f\x2c\x94\xe8\xec\x28\x00\x00\xf3\x0f\x1e\xed\x46\xe1\x10", 66); syz_execute_func(0x20000100); break; case 11: syz_open_pts(); break; } } int main(void) { syscall(SYS_mmap, 0x20000000ul, 0x1000000ul, 3ul, 0x1012ul, -1, 0ul, 0ul); setup_fault(); use_temporary_dir(); do_sandbox_none(); return 0; } :196:13: error: unused function 'csum_inet_init' [-Werror,-Wunused-function] static void csum_inet_init(struct csum_inet* csum) ^ :201:13: error: unused function 'csum_inet_update' [-Werror,-Wunused-function] static void csum_inet_update(struct csum_inet* csum, const uint8_t* data, size_t length) ^ :214:17: error: unused function 'csum_inet_digest' [-Werror,-Wunused-function] static uint16_t csum_inet_digest(struct csum_inet* csum) ^ 3 errors generated. compiler invocation: c++ [-o /tmp/syz-executor3938022174 -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/amd64/7 (1.65s) csource_test.go:118: opts: {Threaded:true Collide:false Repeat:true RepeatTimes:0 Procs:0 Slowdown:10 Sandbox:none Leak:false NetInjection:false NetDevices:false NetReset:false Cgroups:false BinfmtMisc:false CloseFDs:false KCSAN:false DevlinkPCI:false USB:false VhciInjection:false Wifi:false IEEE802154:false Sysctl:false UseTmpDir:true HandleSegv:false Repro:false Trace:false LegacyOptions:{Fault:false FaultCall:0 FaultNth:0}} program: ioctl$TIOCSBRK(0xffffffffffffffff, 0x2000747b) (fail_nth: 1) r0 = openat(0xffffffffffffffff, &(0x7f0000000000)='./file0\x00', 0x80, 0x20) ioctl$TIOCEXCL(r0, 0x2000740d) ioctl$TIOCCONS(r0, 0x80047462, &(0x7f0000000040)=0x5) ioctl$TIOCMBIS(r0, 0x8004746c, &(0x7f0000000080)=0x7) r1 = openat$wsmuxkbd(0xffffffffffffff9c, &(0x7f00000000c0), 0x80, 0x0) mkdirat(r1, &(0x7f0000000100)='./file0\x00', 0x9) ioctl$TIOCMBIC(r1, 0x8004746b, &(0x7f0000000140)=0x101) ioctl$TIOCSCTTY(r1, 0x20007461) ioctl$TIOCGWINSZ(r0, 0x40087468, &(0x7f0000000180)) syz_emit_ethernet(0xee, &(0x7f0000000000)={@empty, @remote, [], {@ipv6={0x86dd, {0x9, 0x6, "43f4aa", 0xb8, 0xff, 0x7f, @rand_addr="90d30d80c6d6830e89f4b2318b419ae5", @mcast1, {[@hopopts={0x29, 0x2, '\x00', [@pad1, @enc_lim, @ra={0x5, 0x2, 0x7f}, @pad1, @ra={0x5, 0x2, 0x9}]}, @routing={0x0, 0xa, 0x0, 0x40, 0x0, [@mcast1, @mcast1, @remote={0xfe, 0x80, '\x00', 0x0}, @remote={0xfe, 0x80, '\x00', 0x0}, @remote={0xfe, 0x80, '\x00', 0x0}]}, @routing={0x2, 0x4, 0x0, 0x9, 0x0, [@mcast2, @loopback]}], @icmpv6=@mld={0x83, 0x0, 0x0, 0x6, 0x0, @rand_addr="e8e6cb3cf819ff793d2471370fdbf3d9"}}}}}}) syz_execute_func(&(0x7f0000000100)="362e450f1824ce66400f72d300656641d9edc401fd105b00c4a3c17e3b00f20f70b100000000b5c4620d9fa41811000000f3460f2c94e8ec280000f30f1eed46e110") syz_extract_tcp_res(&(0x7f0000000180), 0x1f, 0x8) syz_open_pts() csource_test.go:119: 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 int inject_fault(int nth) { return 0; } static void setup_fault() { } static void thread_start(void* (*fn)(void*), void* arg) { pthread_t th; pthread_attr_t attr; pthread_attr_init(&attr); pthread_attr_setstacksize(&attr, 128 << 10); int i = 0; for (; i < 100; i++) { if (pthread_create(&th, &attr, fn, arg) == 0) { pthread_attr_destroy(&attr); return; } if (errno == EAGAIN) { usleep(50); continue; } break; } exit(1); } typedef struct { pthread_mutex_t mu; pthread_cond_t cv; int state; } event_t; static void event_init(event_t* ev) { if (pthread_mutex_init(&ev->mu, 0)) exit(1); if (pthread_cond_init(&ev->cv, 0)) exit(1); ev->state = 0; } static void event_reset(event_t* ev) { ev->state = 0; } static void event_set(event_t* ev) { pthread_mutex_lock(&ev->mu); if (ev->state) exit(1); ev->state = 1; pthread_mutex_unlock(&ev->mu); pthread_cond_broadcast(&ev->cv); } static void event_wait(event_t* ev) { pthread_mutex_lock(&ev->mu); while (!ev->state) pthread_cond_wait(&ev->cv, &ev->mu); pthread_mutex_unlock(&ev->mu); } static int event_isset(event_t* ev) { pthread_mutex_lock(&ev->mu); int res = ev->state; pthread_mutex_unlock(&ev->mu); return res; } static int event_timedwait(event_t* ev, uint64_t timeout) { uint64_t start = current_time_ms(); uint64_t now = start; pthread_mutex_lock(&ev->mu); for (;;) { if (ev->state) break; uint64_t remain = timeout - (now - start); struct timespec ts; ts.tv_sec = remain / 1000; ts.tv_nsec = (remain % 1000) * 1000 * 1000; pthread_cond_timedwait(&ev->cv, &ev->mu, &ts); now = current_time_ms(); if (now - start > timeout) break; } int res = ev->state; pthread_mutex_unlock(&ev->mu); return res; } #define BITMASK(bf_off,bf_len) (((1ull << (bf_len)) - 1) << (bf_off)) #define STORE_BY_BITMASK(type,htobe,addr,val,bf_off,bf_len) *(type*)(addr) = htobe((htobe(*(type*)(addr)) & ~BITMASK((bf_off), (bf_len))) | (((type)(val) << (bf_off)) & BITMASK((bf_off), (bf_len)))) struct csum_inet { uint32_t acc; }; static void csum_inet_init(struct csum_inet* csum) { csum->acc = 0; } static void csum_inet_update(struct csum_inet* csum, const uint8_t* data, size_t length) { if (length == 0) return; size_t i = 0; for (; i < length - 1; i += 2) csum->acc += *(uint16_t*)&data[i]; if (length & 1) csum->acc += le16toh((uint16_t)data[length - 1]); while (csum->acc > 0xffff) csum->acc = (csum->acc & 0xffff) + (csum->acc >> 16); } static uint16_t csum_inet_digest(struct csum_inet* csum) { return ~csum->acc; } #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, 500); 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 < 15000) continue; kill_and_wait(pid, &status); break; } remove_dir(cwdbuf); } } uint64_t r[2] = {0xffffffffffffffff, 0xffffffffffffffff}; void execute_call(int call) { intptr_t res = 0; switch (call) { case 0: inject_fault(1); syscall(SYS_ioctl, -1, 0x2000747bul, 0); break; case 1: memcpy((void*)0x20000000, "./file0\000", 8); res = syscall(SYS_openat, -1, 0x20000000ul, 0x80ul, 0x20ul); if (res != -1) r[0] = res; break; case 2: syscall(SYS_ioctl, r[0], 0x2000740dul, 0); break; case 3: *(uint32_t*)0x20000040 = 5; syscall(SYS_ioctl, r[0], 0x80047462ul, 0x20000040ul); break; case 4: *(uint32_t*)0x20000080 = 7; syscall(SYS_ioctl, r[0], 0x8004746cul, 0x20000080ul); break; case 5: memcpy((void*)0x200000c0, "/dev/wskbd\000", 11); res = syscall(SYS_openat, 0xffffffffffffff9cul, 0x200000c0ul, 0x80ul, 0ul); if (res != -1) r[1] = res; break; case 6: memcpy((void*)0x20000100, "./file0\000", 8); syscall(SYS_mkdirat, r[1], 0x20000100ul, 9ul); break; case 7: *(uint32_t*)0x20000140 = 0x101; syscall(SYS_ioctl, r[1], 0x8004746bul, 0x20000140ul); break; case 8: syscall(SYS_ioctl, r[1], 0x20007461ul, 0); break; case 9: syscall(SYS_ioctl, r[0], 0x40087468ul, 0x20000180ul); break; case 10: memcpy((void*)0x20000100, "\x36\x2e\x45\x0f\x18\x24\xce\x66\x40\x0f\x72\xd3\x00\x65\x66\x41\xd9\xed\xc4\x01\xfd\x10\x5b\x00\xc4\xa3\xc1\x7e\x3b\x00\xf2\x0f\x70\xb1\x00\x00\x00\x00\xb5\xc4\x62\x0d\x9f\xa4\x18\x11\x00\x00\x00\xf3\x46\x0f\x2c\x94\xe8\xec\x28\x00\x00\xf3\x0f\x1e\xed\x46\xe1\x10", 66); syz_execute_func(0x20000100); break; case 11: syz_open_pts(); break; } } int main(void) { syscall(SYS_mmap, 0x20000000ul, 0x1000000ul, 3ul, 0x1012ul, -1, 0ul, 0ul); setup_fault(); use_temporary_dir(); do_sandbox_none(); return 0; } :196:13: error: unused function 'csum_inet_init' [-Werror,-Wunused-function] static void csum_inet_init(struct csum_inet* csum) ^ :201:13: error: unused function 'csum_inet_update' [-Werror,-Wunused-function] static void csum_inet_update(struct csum_inet* csum, const uint8_t* data, size_t length) ^ :214:17: error: unused function 'csum_inet_digest' [-Werror,-Wunused-function] static uint16_t csum_inet_digest(struct csum_inet* csum) ^ 3 errors generated. compiler invocation: c++ [-o /tmp/syz-executor1217574748 -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 (1.68s) csource_test.go:118: opts: {Threaded:true Collide:false Repeat:true RepeatTimes:10 Procs:0 Slowdown:1 Sandbox:none Leak:false NetInjection:false NetDevices:false NetReset:false Cgroups:false BinfmtMisc:false CloseFDs:false KCSAN:false DevlinkPCI:false USB:false VhciInjection:false Wifi:false IEEE802154:false Sysctl:false UseTmpDir:true HandleSegv:false Repro:false Trace:false LegacyOptions:{Fault:false FaultCall:0 FaultNth:0}} program: ioctl$TIOCSBRK(0xffffffffffffffff, 0x2000747b) (fail_nth: 1) r0 = openat(0xffffffffffffffff, &(0x7f0000000000)='./file0\x00', 0x80, 0x20) ioctl$TIOCEXCL(r0, 0x2000740d) ioctl$TIOCCONS(r0, 0x80047462, &(0x7f0000000040)=0x5) ioctl$TIOCMBIS(r0, 0x8004746c, &(0x7f0000000080)=0x7) r1 = openat$wsmuxkbd(0xffffffffffffff9c, &(0x7f00000000c0), 0x80, 0x0) mkdirat(r1, &(0x7f0000000100)='./file0\x00', 0x9) ioctl$TIOCMBIC(r1, 0x8004746b, &(0x7f0000000140)=0x101) ioctl$TIOCSCTTY(r1, 0x20007461) ioctl$TIOCGWINSZ(r0, 0x40087468, &(0x7f0000000180)) syz_emit_ethernet(0xee, &(0x7f0000000000)={@empty, @remote, [], {@ipv6={0x86dd, {0x9, 0x6, "43f4aa", 0xb8, 0xff, 0x7f, @rand_addr="90d30d80c6d6830e89f4b2318b419ae5", @mcast1, {[@hopopts={0x29, 0x2, '\x00', [@pad1, @enc_lim, @ra={0x5, 0x2, 0x7f}, @pad1, @ra={0x5, 0x2, 0x9}]}, @routing={0x0, 0xa, 0x0, 0x40, 0x0, [@mcast1, @mcast1, @remote={0xfe, 0x80, '\x00', 0x0}, @remote={0xfe, 0x80, '\x00', 0x0}, @remote={0xfe, 0x80, '\x00', 0x0}]}, @routing={0x2, 0x4, 0x0, 0x9, 0x0, [@mcast2, @loopback]}], @icmpv6=@mld={0x83, 0x0, 0x0, 0x6, 0x0, @rand_addr="e8e6cb3cf819ff793d2471370fdbf3d9"}}}}}}) syz_execute_func(&(0x7f0000000100)="362e450f1824ce66400f72d300656641d9edc401fd105b00c4a3c17e3b00f20f70b100000000b5c4620d9fa41811000000f3460f2c94e8ec280000f30f1eed46e110") syz_extract_tcp_res(&(0x7f0000000180), 0x1f, 0x8) syz_open_pts() csource_test.go:119: 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 int inject_fault(int nth) { return 0; } static void setup_fault() { } static void thread_start(void* (*fn)(void*), void* arg) { pthread_t th; pthread_attr_t attr; pthread_attr_init(&attr); pthread_attr_setstacksize(&attr, 128 << 10); int i = 0; for (; i < 100; i++) { if (pthread_create(&th, &attr, fn, arg) == 0) { pthread_attr_destroy(&attr); return; } if (errno == EAGAIN) { usleep(50); continue; } break; } exit(1); } typedef struct { pthread_mutex_t mu; pthread_cond_t cv; int state; } event_t; static void event_init(event_t* ev) { if (pthread_mutex_init(&ev->mu, 0)) exit(1); if (pthread_cond_init(&ev->cv, 0)) exit(1); ev->state = 0; } static void event_reset(event_t* ev) { ev->state = 0; } static void event_set(event_t* ev) { pthread_mutex_lock(&ev->mu); if (ev->state) exit(1); ev->state = 1; pthread_mutex_unlock(&ev->mu); pthread_cond_broadcast(&ev->cv); } static void event_wait(event_t* ev) { pthread_mutex_lock(&ev->mu); while (!ev->state) pthread_cond_wait(&ev->cv, &ev->mu); pthread_mutex_unlock(&ev->mu); } static int event_isset(event_t* ev) { pthread_mutex_lock(&ev->mu); int res = ev->state; pthread_mutex_unlock(&ev->mu); return res; } static int event_timedwait(event_t* ev, uint64_t timeout) { uint64_t start = current_time_ms(); uint64_t now = start; pthread_mutex_lock(&ev->mu); for (;;) { if (ev->state) break; uint64_t remain = timeout - (now - start); struct timespec ts; ts.tv_sec = remain / 1000; ts.tv_nsec = (remain % 1000) * 1000 * 1000; pthread_cond_timedwait(&ev->cv, &ev->mu, &ts); now = current_time_ms(); if (now - start > timeout) break; } int res = ev->state; pthread_mutex_unlock(&ev->mu); return res; } #define BITMASK(bf_off,bf_len) (((1ull << (bf_len)) - 1) << (bf_off)) #define STORE_BY_BITMASK(type,htobe,addr,val,bf_off,bf_len) *(type*)(addr) = htobe((htobe(*(type*)(addr)) & ~BITMASK((bf_off), (bf_len))) | (((type)(val) << (bf_off)) & BITMASK((bf_off), (bf_len)))) struct csum_inet { uint32_t acc; }; static void csum_inet_init(struct csum_inet* csum) { csum->acc = 0; } static void csum_inet_update(struct csum_inet* csum, const uint8_t* data, size_t length) { if (length == 0) return; size_t i = 0; for (; i < length - 1; i += 2) csum->acc += *(uint16_t*)&data[i]; if (length & 1) csum->acc += le16toh((uint16_t)data[length - 1]); while (csum->acc > 0xffff) csum->acc = (csum->acc & 0xffff) + (csum->acc >> 16); } static uint16_t csum_inet_digest(struct csum_inet* csum) { return ~csum->acc; } #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 < 10; 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[2] = {0xffffffffffffffff, 0xffffffffffffffff}; void execute_call(int call) { intptr_t res = 0; switch (call) { case 0: inject_fault(1); syscall(SYS_ioctl, -1, 0x2000747bul, 0); break; case 1: memcpy((void*)0x20000000, "./file0\000", 8); res = syscall(SYS_openat, -1, 0x20000000ul, 0x80ul, 0x20ul); if (res != -1) r[0] = res; break; case 2: syscall(SYS_ioctl, r[0], 0x2000740dul, 0); break; case 3: *(uint32_t*)0x20000040 = 5; syscall(SYS_ioctl, r[0], 0x80047462ul, 0x20000040ul); break; case 4: *(uint32_t*)0x20000080 = 7; syscall(SYS_ioctl, r[0], 0x8004746cul, 0x20000080ul); break; case 5: memcpy((void*)0x200000c0, "/dev/wskbd\000", 11); res = syscall(SYS_openat, 0xffffffffffffff9cul, 0x200000c0ul, 0x80ul, 0ul); if (res != -1) r[1] = res; break; case 6: memcpy((void*)0x20000100, "./file0\000", 8); syscall(SYS_mkdirat, r[1], 0x20000100ul, 9ul); break; case 7: *(uint32_t*)0x20000140 = 0x101; syscall(SYS_ioctl, r[1], 0x8004746bul, 0x20000140ul); break; case 8: syscall(SYS_ioctl, r[1], 0x20007461ul, 0); break; case 9: syscall(SYS_ioctl, r[0], 0x40087468ul, 0x20000180ul); break; case 10: memcpy((void*)0x20000100, "\x36\x2e\x45\x0f\x18\x24\xce\x66\x40\x0f\x72\xd3\x00\x65\x66\x41\xd9\xed\xc4\x01\xfd\x10\x5b\x00\xc4\xa3\xc1\x7e\x3b\x00\xf2\x0f\x70\xb1\x00\x00\x00\x00\xb5\xc4\x62\x0d\x9f\xa4\x18\x11\x00\x00\x00\xf3\x46\x0f\x2c\x94\xe8\xec\x28\x00\x00\xf3\x0f\x1e\xed\x46\xe1\x10", 66); syz_execute_func(0x20000100); break; case 11: syz_open_pts(); break; } } int main(void) { syscall(SYS_mmap, 0x20000000ul, 0x1000000ul, 3ul, 0x1012ul, -1, 0ul, 0ul); setup_fault(); use_temporary_dir(); do_sandbox_none(); return 0; } :196:13: error: unused function 'csum_inet_init' [-Werror,-Wunused-function] static void csum_inet_init(struct csum_inet* csum) ^ :201:13: error: unused function 'csum_inet_update' [-Werror,-Wunused-function] static void csum_inet_update(struct csum_inet* csum, const uint8_t* data, size_t length) ^ :214:17: error: unused function 'csum_inet_digest' [-Werror,-Wunused-function] static uint16_t csum_inet_digest(struct csum_inet* csum) ^ 3 errors generated. compiler invocation: c++ [-o /tmp/syz-executor2504222595 -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/amd64/6 (1.50s) csource_test.go:118: opts: {Threaded:true Collide:false Repeat:true RepeatTimes:0 Procs:4 Slowdown:1 Sandbox:none Leak:false NetInjection:false NetDevices:false NetReset:false Cgroups:false BinfmtMisc:false CloseFDs:false KCSAN:false DevlinkPCI:false USB:false VhciInjection:false Wifi:false IEEE802154:false Sysctl:false UseTmpDir:true HandleSegv:false Repro:false Trace:false LegacyOptions:{Fault:false FaultCall:0 FaultNth:0}} program: ioctl$TIOCSBRK(0xffffffffffffffff, 0x2000747b) (fail_nth: 1) r0 = openat(0xffffffffffffffff, &(0x7f0000000000)='./file0\x00', 0x80, 0x20) ioctl$TIOCEXCL(r0, 0x2000740d) ioctl$TIOCCONS(r0, 0x80047462, &(0x7f0000000040)=0x5) ioctl$TIOCMBIS(r0, 0x8004746c, &(0x7f0000000080)=0x7) r1 = openat$wsmuxkbd(0xffffffffffffff9c, &(0x7f00000000c0), 0x80, 0x0) mkdirat(r1, &(0x7f0000000100)='./file0\x00', 0x9) ioctl$TIOCMBIC(r1, 0x8004746b, &(0x7f0000000140)=0x101) ioctl$TIOCSCTTY(r1, 0x20007461) ioctl$TIOCGWINSZ(r0, 0x40087468, &(0x7f0000000180)) syz_emit_ethernet(0xee, &(0x7f0000000000)={@empty, @remote, [], {@ipv6={0x86dd, {0x9, 0x6, "43f4aa", 0xb8, 0xff, 0x7f, @rand_addr="90d30d80c6d6830e89f4b2318b419ae5", @mcast1, {[@hopopts={0x29, 0x2, '\x00', [@pad1, @enc_lim, @ra={0x5, 0x2, 0x7f}, @pad1, @ra={0x5, 0x2, 0x9}]}, @routing={0x0, 0xa, 0x0, 0x40, 0x0, [@mcast1, @mcast1, @remote={0xfe, 0x80, '\x00', 0x0}, @remote={0xfe, 0x80, '\x00', 0x0}, @remote={0xfe, 0x80, '\x00', 0x0}]}, @routing={0x2, 0x4, 0x0, 0x9, 0x0, [@mcast2, @loopback]}], @icmpv6=@mld={0x83, 0x0, 0x0, 0x6, 0x0, @rand_addr="e8e6cb3cf819ff793d2471370fdbf3d9"}}}}}}) syz_execute_func(&(0x7f0000000100)="362e450f1824ce66400f72d300656641d9edc401fd105b00c4a3c17e3b00f20f70b100000000b5c4620d9fa41811000000f3460f2c94e8ec280000f30f1eed46e110") syz_extract_tcp_res(&(0x7f0000000180), 0x1f, 0x8) syz_open_pts() csource_test.go:119: 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 int inject_fault(int nth) { return 0; } static void setup_fault() { } static void thread_start(void* (*fn)(void*), void* arg) { pthread_t th; pthread_attr_t attr; pthread_attr_init(&attr); pthread_attr_setstacksize(&attr, 128 << 10); int i = 0; for (; i < 100; i++) { if (pthread_create(&th, &attr, fn, arg) == 0) { pthread_attr_destroy(&attr); return; } if (errno == EAGAIN) { usleep(50); continue; } break; } exit(1); } typedef struct { pthread_mutex_t mu; pthread_cond_t cv; int state; } event_t; static void event_init(event_t* ev) { if (pthread_mutex_init(&ev->mu, 0)) exit(1); if (pthread_cond_init(&ev->cv, 0)) exit(1); ev->state = 0; } static void event_reset(event_t* ev) { ev->state = 0; } static void event_set(event_t* ev) { pthread_mutex_lock(&ev->mu); if (ev->state) exit(1); ev->state = 1; pthread_mutex_unlock(&ev->mu); pthread_cond_broadcast(&ev->cv); } static void event_wait(event_t* ev) { pthread_mutex_lock(&ev->mu); while (!ev->state) pthread_cond_wait(&ev->cv, &ev->mu); pthread_mutex_unlock(&ev->mu); } static int event_isset(event_t* ev) { pthread_mutex_lock(&ev->mu); int res = ev->state; pthread_mutex_unlock(&ev->mu); return res; } static int event_timedwait(event_t* ev, uint64_t timeout) { uint64_t start = current_time_ms(); uint64_t now = start; pthread_mutex_lock(&ev->mu); for (;;) { if (ev->state) break; uint64_t remain = timeout - (now - start); struct timespec ts; ts.tv_sec = remain / 1000; ts.tv_nsec = (remain % 1000) * 1000 * 1000; pthread_cond_timedwait(&ev->cv, &ev->mu, &ts); now = current_time_ms(); if (now - start > timeout) break; } int res = ev->state; pthread_mutex_unlock(&ev->mu); return res; } #define BITMASK(bf_off,bf_len) (((1ull << (bf_len)) - 1) << (bf_off)) #define STORE_BY_BITMASK(type,htobe,addr,val,bf_off,bf_len) *(type*)(addr) = htobe((htobe(*(type*)(addr)) & ~BITMASK((bf_off), (bf_len))) | (((type)(val) << (bf_off)) & BITMASK((bf_off), (bf_len)))) struct csum_inet { uint32_t acc; }; static void csum_inet_init(struct csum_inet* csum) { csum->acc = 0; } static void csum_inet_update(struct csum_inet* csum, const uint8_t* data, size_t length) { if (length == 0) return; size_t i = 0; for (; i < length - 1; i += 2) csum->acc += *(uint16_t*)&data[i]; if (length & 1) csum->acc += le16toh((uint16_t)data[length - 1]); while (csum->acc > 0xffff) csum->acc = (csum->acc & 0xffff) + (csum->acc >> 16); } static uint16_t csum_inet_digest(struct csum_inet* csum) { return ~csum->acc; } #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[2] = {0xffffffffffffffff, 0xffffffffffffffff}; void execute_call(int call) { intptr_t res = 0; switch (call) { case 0: inject_fault(1); syscall(SYS_ioctl, -1, 0x2000747bul, 0); break; case 1: memcpy((void*)0x20000000, "./file0\000", 8); res = syscall(SYS_openat, -1, 0x20000000ul, 0x80ul, 0x20ul); if (res != -1) r[0] = res; break; case 2: syscall(SYS_ioctl, r[0], 0x2000740dul, 0); break; case 3: *(uint32_t*)0x20000040 = 5; syscall(SYS_ioctl, r[0], 0x80047462ul, 0x20000040ul); break; case 4: *(uint32_t*)0x20000080 = 7; syscall(SYS_ioctl, r[0], 0x8004746cul, 0x20000080ul); break; case 5: memcpy((void*)0x200000c0, "/dev/wskbd\000", 11); res = syscall(SYS_openat, 0xffffffffffffff9cul, 0x200000c0ul, 0x80ul, 0ul); if (res != -1) r[1] = res; break; case 6: memcpy((void*)0x20000100, "./file0\000", 8); syscall(SYS_mkdirat, r[1], 0x20000100ul, 9ul); break; case 7: *(uint32_t*)0x20000140 = 0x101; syscall(SYS_ioctl, r[1], 0x8004746bul, 0x20000140ul); break; case 8: syscall(SYS_ioctl, r[1], 0x20007461ul, 0); break; case 9: syscall(SYS_ioctl, r[0], 0x40087468ul, 0x20000180ul); break; case 10: memcpy((void*)0x20000100, "\x36\x2e\x45\x0f\x18\x24\xce\x66\x40\x0f\x72\xd3\x00\x65\x66\x41\xd9\xed\xc4\x01\xfd\x10\x5b\x00\xc4\xa3\xc1\x7e\x3b\x00\xf2\x0f\x70\xb1\x00\x00\x00\x00\xb5\xc4\x62\x0d\x9f\xa4\x18\x11\x00\x00\x00\xf3\x46\x0f\x2c\x94\xe8\xec\x28\x00\x00\xf3\x0f\x1e\xed\x46\xe1\x10", 66); syz_execute_func(0x20000100); break; case 11: syz_open_pts(); break; } } int main(void) { syscall(SYS_mmap, 0x20000000ul, 0x1000000ul, 3ul, 0x1012ul, -1, 0ul, 0ul); setup_fault(); for (procid = 0; procid < 4; procid++) { if (fork() == 0) { use_temporary_dir(); do_sandbox_none(); } } sleep(1000000); return 0; } :198:13: error: unused function 'csum_inet_init' [-Werror,-Wunused-function] static void csum_inet_init(struct csum_inet* csum) ^ :203:13: error: unused function 'csum_inet_update' [-Werror,-Wunused-function] static void csum_inet_update(struct csum_inet* csum, const uint8_t* data, size_t length) ^ :216:17: error: unused function 'csum_inet_digest' [-Werror,-Wunused-function] static uint16_t csum_inet_digest(struct csum_inet* csum) ^ 3 errors generated. compiler invocation: c++ [-o /tmp/syz-executor2307556703 -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/amd64/5 (0.89s) csource_test.go:116: --- FAIL: TestGenerate/openbsd/amd64/3 (0.72s) csource_test.go:116: --- FAIL: TestGenerate/openbsd/amd64/2 (0.78s) csource_test.go:116: --- FAIL: TestGenerate/openbsd/amd64/1 (0.66s) csource_test.go:116: FAIL FAIL github.com/google/syzkaller/pkg/csource 17.906s 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 0.335s 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/darwin [no test files] ? github.com/google/syzkaller/sys/darwin/gen [no test files] ? github.com/google/syzkaller/sys/freebsd [no test files] ? github.com/google/syzkaller/sys/freebsd/gen [no test files] ? github.com/google/syzkaller/sys/fuchsia [no test files] ? github.com/google/syzkaller/sys/fuchsia/fidlgen [no test files] ? github.com/google/syzkaller/sys/fuchsia/gen [no test files] ? github.com/google/syzkaller/sys/fuchsia/layout [no test files] 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/syz-runner [no test files] ok github.com/google/syzkaller/syz-verifier 1.315s ? github.com/google/syzkaller/tools/syz-benchcmp [no test files] ? github.com/google/syzkaller/tools/syz-bisect [no test files] ? github.com/google/syzkaller/tools/syz-build [no test files] ? github.com/google/syzkaller/tools/syz-check [no test files] ? github.com/google/syzkaller/tools/syz-cover [no test files] ? github.com/google/syzkaller/tools/syz-crush [no test files] ? github.com/google/syzkaller/tools/syz-db [no test files] ? github.com/google/syzkaller/tools/syz-execprog [no test files] ? github.com/google/syzkaller/tools/syz-expand [no test files] ? github.com/google/syzkaller/tools/syz-fmt [no test files] ? github.com/google/syzkaller/tools/syz-hubtool [no test files] ? github.com/google/syzkaller/tools/syz-kcidb [no test files] ok github.com/google/syzkaller/tools/syz-kconf (cached) 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