// https://syzkaller.appspot.com/bug?id=33be1b73bbecb4b62186627650e6ce0965465ba4 // autogenerated by syzkaller (https://github.com/google/syzkaller) #define _GNU_SOURCE #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #ifndef __NR_bpf #define __NR_bpf 321 #endif static __thread int clone_ongoing; static __thread int skip_segv; static __thread jmp_buf segv_env; static void segv_handler(int sig, siginfo_t* info, void* ctx) { if (__atomic_load_n(&clone_ongoing, __ATOMIC_RELAXED) != 0) { exit(sig); } uintptr_t addr = (uintptr_t)info->si_addr; const uintptr_t prog_start = 1 << 20; const uintptr_t prog_end = 100 << 20; int skip = __atomic_load_n(&skip_segv, __ATOMIC_RELAXED) != 0; int valid = addr < prog_start || addr > prog_end; if (skip && valid) { _longjmp(segv_env, 1); } exit(sig); } static void install_segv_handler(void) { struct sigaction sa; memset(&sa, 0, sizeof(sa)); sa.sa_handler = SIG_IGN; syscall(SYS_rt_sigaction, 0x20, &sa, NULL, 8); syscall(SYS_rt_sigaction, 0x21, &sa, NULL, 8); memset(&sa, 0, sizeof(sa)); sa.sa_sigaction = segv_handler; sa.sa_flags = SA_NODEFER | SA_SIGINFO; sigaction(SIGSEGV, &sa, NULL); sigaction(SIGBUS, &sa, NULL); } #define NONFAILING(...) \ ({ \ int ok = 1; \ __atomic_fetch_add(&skip_segv, 1, __ATOMIC_SEQ_CST); \ if (_setjmp(segv_env) == 0) { \ __VA_ARGS__; \ } else \ ok = 0; \ __atomic_fetch_sub(&skip_segv, 1, __ATOMIC_SEQ_CST); \ ok; \ }) static void sleep_ms(uint64_t ms) { usleep(ms * 1000); } static uint64_t current_time_ms(void) { struct timespec ts; if (clock_gettime(CLOCK_MONOTONIC, &ts)) exit(1); return (uint64_t)ts.tv_sec * 1000 + (uint64_t)ts.tv_nsec / 1000000; } static void thread_start(void* (*fn)(void*), void* arg) { pthread_t th; pthread_attr_t attr; pthread_attr_init(&attr); pthread_attr_setstacksize(&attr, 128 << 10); int i = 0; for (; i < 100; i++) { if (pthread_create(&th, &attr, fn, arg) == 0) { pthread_attr_destroy(&attr); return; } if (errno == EAGAIN) { usleep(50); continue; } break; } exit(1); } #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)))) typedef struct { int state; } event_t; static void event_init(event_t* ev) { ev->state = 0; } static void event_reset(event_t* ev) { ev->state = 0; } static void event_set(event_t* ev) { if (ev->state) exit(1); __atomic_store_n(&ev->state, 1, __ATOMIC_RELEASE); syscall(SYS_futex, &ev->state, FUTEX_WAKE | FUTEX_PRIVATE_FLAG, 1000000); } static void event_wait(event_t* ev) { while (!__atomic_load_n(&ev->state, __ATOMIC_ACQUIRE)) syscall(SYS_futex, &ev->state, FUTEX_WAIT | FUTEX_PRIVATE_FLAG, 0, 0); } static int event_isset(event_t* ev) { return __atomic_load_n(&ev->state, __ATOMIC_ACQUIRE); } static int event_timedwait(event_t* ev, uint64_t timeout) { uint64_t start = current_time_ms(); uint64_t now = start; for (;;) { uint64_t remain = timeout - (now - start); struct timespec ts; ts.tv_sec = remain / 1000; ts.tv_nsec = (remain % 1000) * 1000 * 1000; syscall(SYS_futex, &ev->state, FUTEX_WAIT | FUTEX_PRIVATE_FLAG, 0, &ts); if (__atomic_load_n(&ev->state, __ATOMIC_ACQUIRE)) return 1; now = current_time_ms(); if (now - start > timeout) return 0; } } static bool write_file(const char* file, const char* what, ...) { char buf[1024]; va_list args; va_start(args, what); vsnprintf(buf, sizeof(buf), what, args); va_end(args); buf[sizeof(buf) - 1] = 0; int len = strlen(buf); int fd = open(file, O_WRONLY | O_CLOEXEC); if (fd == -1) return false; if (write(fd, buf, len) != len) { int err = errno; close(fd); errno = err; return false; } close(fd); return true; } static int runcmdline(char* cmdline) { int ret = system(cmdline); if (ret) { } return ret; } #define MAX_FDS 30 static void setup_common() { if (mount(0, "/sys/fs/fuse/connections", "fusectl", 0, 0)) { } } static void setup_binderfs() { if (mkdir("/dev/binderfs", 0777)) { } if (mount("binder", "/dev/binderfs", "binder", 0, NULL)) { } if (symlink("/dev/binderfs", "./binderfs")) { } } static void loop(); static void sandbox_common() { prctl(PR_SET_PDEATHSIG, SIGKILL, 0, 0, 0); setsid(); struct rlimit rlim; rlim.rlim_cur = rlim.rlim_max = (200 << 20); setrlimit(RLIMIT_AS, &rlim); rlim.rlim_cur = rlim.rlim_max = 32 << 20; setrlimit(RLIMIT_MEMLOCK, &rlim); rlim.rlim_cur = rlim.rlim_max = 136 << 20; setrlimit(RLIMIT_FSIZE, &rlim); rlim.rlim_cur = rlim.rlim_max = 1 << 20; setrlimit(RLIMIT_STACK, &rlim); rlim.rlim_cur = rlim.rlim_max = 128 << 20; setrlimit(RLIMIT_CORE, &rlim); rlim.rlim_cur = rlim.rlim_max = 256; setrlimit(RLIMIT_NOFILE, &rlim); if (unshare(CLONE_NEWNS)) { } if (mount(NULL, "/", NULL, MS_REC | MS_PRIVATE, NULL)) { } if (unshare(CLONE_NEWIPC)) { } if (unshare(0x02000000)) { } if (unshare(CLONE_NEWUTS)) { } if (unshare(CLONE_SYSVSEM)) { } typedef struct { const char* name; const char* value; } sysctl_t; static const sysctl_t sysctls[] = { {"/proc/sys/kernel/shmmax", "16777216"}, {"/proc/sys/kernel/shmall", "536870912"}, {"/proc/sys/kernel/shmmni", "1024"}, {"/proc/sys/kernel/msgmax", "8192"}, {"/proc/sys/kernel/msgmni", "1024"}, {"/proc/sys/kernel/msgmnb", "1024"}, {"/proc/sys/kernel/sem", "1024 1048576 500 1024"}, }; unsigned i; for (i = 0; i < sizeof(sysctls) / sizeof(sysctls[0]); i++) write_file(sysctls[i].name, sysctls[i].value); } static int wait_for_loop(int pid) { if (pid < 0) exit(1); int status = 0; while (waitpid(-1, &status, __WALL) != pid) { } return WEXITSTATUS(status); } static void drop_caps(void) { struct __user_cap_header_struct cap_hdr = {}; struct __user_cap_data_struct cap_data[2] = {}; cap_hdr.version = _LINUX_CAPABILITY_VERSION_3; cap_hdr.pid = getpid(); if (syscall(SYS_capget, &cap_hdr, &cap_data)) exit(1); const int drop = (1 << CAP_SYS_PTRACE) | (1 << CAP_SYS_NICE); cap_data[0].effective &= ~drop; cap_data[0].permitted &= ~drop; cap_data[0].inheritable &= ~drop; if (syscall(SYS_capset, &cap_hdr, &cap_data)) exit(1); } static int do_sandbox_none(void) { if (unshare(CLONE_NEWPID)) { } int pid = fork(); if (pid != 0) return wait_for_loop(pid); setup_common(); sandbox_common(); drop_caps(); if (unshare(CLONE_NEWNET)) { } write_file("/proc/sys/net/ipv4/ping_group_range", "0 65535"); setup_binderfs(); loop(); exit(1); } static void kill_and_wait(int pid, int* status) { kill(-pid, SIGKILL); kill(pid, SIGKILL); for (int i = 0; i < 100; i++) { if (waitpid(-1, status, WNOHANG | __WALL) == pid) return; usleep(1000); } DIR* dir = opendir("/sys/fs/fuse/connections"); if (dir) { for (;;) { struct dirent* ent = readdir(dir); if (!ent) break; if (strcmp(ent->d_name, ".") == 0 || strcmp(ent->d_name, "..") == 0) continue; char abort[300]; snprintf(abort, sizeof(abort), "/sys/fs/fuse/connections/%s/abort", ent->d_name); int fd = open(abort, O_WRONLY); if (fd == -1) { continue; } if (write(fd, abort, 1) < 0) { } close(fd); } closedir(dir); } else { } while (waitpid(-1, status, __WALL) != pid) { } } static void setup_test() { prctl(PR_SET_PDEATHSIG, SIGKILL, 0, 0, 0); setpgrp(); write_file("/proc/self/oom_score_adj", "1000"); } static void close_fds() { for (int fd = 3; fd < MAX_FDS; fd++) close(fd); } static void setup_sysctl() { char mypid[32]; snprintf(mypid, sizeof(mypid), "%d", getpid()); struct { const char* name; const char* data; } files[] = { {"/sys/kernel/debug/x86/nmi_longest_ns", "10000000000"}, {"/proc/sys/kernel/hung_task_check_interval_secs", "20"}, {"/proc/sys/net/core/bpf_jit_kallsyms", "1"}, {"/proc/sys/net/core/bpf_jit_harden", "0"}, {"/proc/sys/kernel/kptr_restrict", "0"}, {"/proc/sys/kernel/softlockup_all_cpu_backtrace", "1"}, {"/proc/sys/fs/mount-max", "100"}, {"/proc/sys/vm/oom_dump_tasks", "0"}, {"/proc/sys/debug/exception-trace", "0"}, {"/proc/sys/kernel/printk", "7 4 1 3"}, {"/proc/sys/kernel/keys/gc_delay", "1"}, {"/proc/sys/vm/oom_kill_allocating_task", "1"}, {"/proc/sys/kernel/ctrl-alt-del", "0"}, {"/proc/sys/kernel/cad_pid", mypid}, }; for (size_t i = 0; i < sizeof(files) / sizeof(files[0]); i++) { if (!write_file(files[i].name, files[i].data)) printf("write to %s failed: %s\n", files[i].name, strerror(errno)); } } #define SWAP_FILE "./swap-file" #define SWAP_FILE_SIZE (128 * 1000 * 1000) static void setup_swap() { swapoff(SWAP_FILE); unlink(SWAP_FILE); int fd = open(SWAP_FILE, O_CREAT | O_WRONLY | O_CLOEXEC, 0600); if (fd == -1) { exit(1); return; } fallocate(fd, FALLOC_FL_ZERO_RANGE, 0, SWAP_FILE_SIZE); close(fd); char cmdline[64]; sprintf(cmdline, "mkswap %s", SWAP_FILE); if (runcmdline(cmdline)) { exit(1); return; } if (swapon(SWAP_FILE, SWAP_FLAG_PREFER) == 1) { exit(1); return; } } 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 < 5; 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); close_fds(); } static void execute_one(void); #define WAIT_FLAGS __WALL static void loop(void) { int iter = 0; for (;; iter++) { int pid = fork(); if (pid < 0) exit(1); if (pid == 0) { setup_test(); execute_one(); exit(0); } int status = 0; uint64_t start = current_time_ms(); for (;;) { if (waitpid(-1, &status, WNOHANG | WAIT_FLAGS) == pid) break; sleep_ms(1); if (current_time_ms() - start < 5000) continue; kill_and_wait(pid, &status); break; } } } uint64_t r[3] = {0xffffffffffffffff, 0xffffffffffffffff, 0xffffffffffffffff}; void execute_call(int call) { intptr_t res = 0; switch (call) { case 0: NONFAILING(*(uint32_t*)0x200009c0 = 0x19); NONFAILING(*(uint32_t*)0x200009c4 = 4); NONFAILING(*(uint32_t*)0x200009c8 = 8); NONFAILING(*(uint32_t*)0x200009cc = 8); NONFAILING(*(uint32_t*)0x200009d0 = 0); NONFAILING(*(uint32_t*)0x200009d4 = -1); NONFAILING(*(uint32_t*)0x200009d8 = 0); NONFAILING(memset((void*)0x200009dc, 0, 16)); NONFAILING(*(uint32_t*)0x200009ec = 0); NONFAILING(*(uint32_t*)0x200009f0 = -1); NONFAILING(*(uint32_t*)0x200009f4 = 0); NONFAILING(*(uint32_t*)0x200009f8 = 0); NONFAILING(*(uint32_t*)0x200009fc = 0); NONFAILING(*(uint64_t*)0x20000a00 = 0); res = syscall(__NR_bpf, /*cmd=*/0ul, /*arg=*/0x200009c0ul, /*size=*/0x48ul); if (res != -1) r[0] = res; break; case 1: NONFAILING(*(uint32_t*)0x200000c0 = 6); NONFAILING(*(uint32_t*)0x200000c4 = 0xc); NONFAILING(*(uint64_t*)0x200000c8 = 0x20000000); NONFAILING(*(uint8_t*)0x20000000 = 0x18); NONFAILING(STORE_BY_BITMASK(uint8_t, , 0x20000001, 0, 0, 4)); NONFAILING(STORE_BY_BITMASK(uint8_t, , 0x20000001, 0, 4, 4)); NONFAILING(*(uint16_t*)0x20000002 = 0); NONFAILING(*(uint32_t*)0x20000004 = 0); NONFAILING(*(uint8_t*)0x20000008 = 0); NONFAILING(*(uint8_t*)0x20000009 = 0); NONFAILING(*(uint16_t*)0x2000000a = 0); NONFAILING(*(uint32_t*)0x2000000c = 0); NONFAILING(*(uint8_t*)0x20000010 = 0x18); NONFAILING(STORE_BY_BITMASK(uint8_t, , 0x20000011, 1, 0, 4)); NONFAILING(STORE_BY_BITMASK(uint8_t, , 0x20000011, 1, 4, 4)); NONFAILING(*(uint16_t*)0x20000012 = 0); NONFAILING(*(uint32_t*)0x20000014 = r[0]); NONFAILING(*(uint8_t*)0x20000018 = 0); NONFAILING(*(uint8_t*)0x20000019 = 0); NONFAILING(*(uint16_t*)0x2000001a = 0); NONFAILING(*(uint32_t*)0x2000001c = 0); NONFAILING(STORE_BY_BITMASK(uint8_t, , 0x20000020, 7, 0, 3)); NONFAILING(STORE_BY_BITMASK(uint8_t, , 0x20000020, 0, 3, 1)); NONFAILING(STORE_BY_BITMASK(uint8_t, , 0x20000020, 0xb, 4, 4)); NONFAILING(STORE_BY_BITMASK(uint8_t, , 0x20000021, 8, 0, 4)); NONFAILING(STORE_BY_BITMASK(uint8_t, , 0x20000021, 0, 4, 4)); NONFAILING(*(uint16_t*)0x20000022 = 0); NONFAILING(*(uint32_t*)0x20000024 = 0); NONFAILING(STORE_BY_BITMASK(uint8_t, , 0x20000028, 3, 0, 3)); NONFAILING(STORE_BY_BITMASK(uint8_t, , 0x20000028, 3, 3, 2)); NONFAILING(STORE_BY_BITMASK(uint8_t, , 0x20000028, 3, 5, 3)); NONFAILING(STORE_BY_BITMASK(uint8_t, , 0x20000029, 0xa, 0, 4)); NONFAILING(STORE_BY_BITMASK(uint8_t, , 0x20000029, 8, 4, 4)); NONFAILING(*(uint16_t*)0x2000002a = 0xfff8); NONFAILING(*(uint32_t*)0x2000002c = 0); NONFAILING(STORE_BY_BITMASK(uint8_t, , 0x20000030, 4, 0, 3)); NONFAILING(STORE_BY_BITMASK(uint8_t, , 0x20000030, 1, 3, 1)); NONFAILING(STORE_BY_BITMASK(uint8_t, , 0x20000030, 0xb, 4, 4)); NONFAILING(STORE_BY_BITMASK(uint8_t, , 0x20000031, 2, 0, 4)); NONFAILING(STORE_BY_BITMASK(uint8_t, , 0x20000031, 0xa, 4, 4)); NONFAILING(*(uint16_t*)0x20000032 = 0); NONFAILING(*(uint32_t*)0x20000034 = 0); NONFAILING(STORE_BY_BITMASK(uint8_t, , 0x20000038, 6, 0, 3)); NONFAILING(STORE_BY_BITMASK(uint8_t, , 0x20000038, 0, 3, 1)); NONFAILING(STORE_BY_BITMASK(uint8_t, , 0x20000038, 0xa, 4, 4)); NONFAILING(STORE_BY_BITMASK(uint8_t, , 0x20000039, 2, 0, 4)); NONFAILING(STORE_BY_BITMASK(uint8_t, , 0x20000039, 0, 4, 4)); NONFAILING(*(uint16_t*)0x2000003a = 0); NONFAILING(*(uint32_t*)0x2000003c = 0xfffffff8); NONFAILING(STORE_BY_BITMASK(uint8_t, , 0x20000040, 7, 0, 3)); NONFAILING(STORE_BY_BITMASK(uint8_t, , 0x20000040, 0, 3, 1)); NONFAILING(STORE_BY_BITMASK(uint8_t, , 0x20000040, 0xb, 4, 4)); NONFAILING(STORE_BY_BITMASK(uint8_t, , 0x20000041, 3, 0, 4)); NONFAILING(STORE_BY_BITMASK(uint8_t, , 0x20000041, 0, 4, 4)); NONFAILING(*(uint16_t*)0x20000042 = 0); NONFAILING(*(uint32_t*)0x20000044 = 8); NONFAILING(STORE_BY_BITMASK(uint8_t, , 0x20000048, 7, 0, 3)); NONFAILING(STORE_BY_BITMASK(uint8_t, , 0x20000048, 0, 3, 1)); NONFAILING(STORE_BY_BITMASK(uint8_t, , 0x20000048, 0xb, 4, 4)); NONFAILING(STORE_BY_BITMASK(uint8_t, , 0x20000049, 4, 0, 4)); NONFAILING(STORE_BY_BITMASK(uint8_t, , 0x20000049, 0, 4, 4)); NONFAILING(*(uint16_t*)0x2000004a = 0); NONFAILING(*(uint32_t*)0x2000004c = 0); NONFAILING(*(uint8_t*)0x20000050 = 0x85); NONFAILING(*(uint8_t*)0x20000051 = 0); NONFAILING(*(uint16_t*)0x20000052 = 0); NONFAILING(*(uint32_t*)0x20000054 = 0x33); NONFAILING(*(uint8_t*)0x20000058 = 0x95); NONFAILING(*(uint8_t*)0x20000059 = 0); NONFAILING(*(uint16_t*)0x2000005a = 0); NONFAILING(*(uint32_t*)0x2000005c = 0); NONFAILING(*(uint64_t*)0x200000d0 = 0x20000180); NONFAILING(memcpy((void*)0x20000180, "GPL\000", 4)); NONFAILING(*(uint32_t*)0x200000d8 = 0); NONFAILING(*(uint32_t*)0x200000dc = 0); NONFAILING(*(uint64_t*)0x200000e0 = 0); NONFAILING(*(uint32_t*)0x200000e8 = 0); NONFAILING(*(uint32_t*)0x200000ec = 0); NONFAILING(memset((void*)0x200000f0, 0, 16)); NONFAILING(*(uint32_t*)0x20000100 = 0); NONFAILING(*(uint32_t*)0x20000104 = 0); NONFAILING(*(uint32_t*)0x20000108 = -1); NONFAILING(*(uint32_t*)0x2000010c = 0); NONFAILING(*(uint64_t*)0x20000110 = 0); NONFAILING(*(uint32_t*)0x20000118 = 0); NONFAILING(*(uint32_t*)0x2000011c = 0); NONFAILING(*(uint64_t*)0x20000120 = 0); NONFAILING(*(uint32_t*)0x20000128 = 0); NONFAILING(*(uint32_t*)0x2000012c = 0); NONFAILING(*(uint32_t*)0x20000130 = 0); NONFAILING(*(uint32_t*)0x20000134 = 0); NONFAILING(*(uint64_t*)0x20000138 = 0); NONFAILING(*(uint64_t*)0x20000140 = 0); NONFAILING(*(uint32_t*)0x20000148 = 0); NONFAILING(*(uint32_t*)0x2000014c = 0); res = syscall(__NR_bpf, /*cmd=*/5ul, /*arg=*/0x200000c0ul, /*size=*/0x90ul); if (res != -1) r[1] = res; break; case 2: NONFAILING(*(uint32_t*)0x20000500 = r[1]); NONFAILING(*(uint32_t*)0x20000504 = -1); NONFAILING(*(uint32_t*)0x20000508 = 0); syscall(__NR_bpf, /*cmd=*/0xaul, /*arg=*/0x20000500ul, /*size=*/0xcul); break; case 3: NONFAILING(*(uint32_t*)0x200000c0 = 6); NONFAILING(*(uint32_t*)0x200000c4 = 0xb); NONFAILING(*(uint64_t*)0x200000c8 = 0x200001c0); NONFAILING(memcpy( (void*)0x200001c0, "\x18\x05\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x18" "\x01\x00\x00\x78\x6c\x6c\x35\x00\x00\x00\x00\x00\x20\x20\x20\x7b\x1a" "\xf8\xff\x00\x00\x00\x00\xbf\xa1\x00\x00\x00\x00\x00\x00\x07\x01\x00" "\x00\xf8\xff\xff\xff\xb7\x02\x00\x00\x08\x00\x00\x00\xb7\x03\x00\x00" "\x00\x00\x00\x00\x85\x00\x00\x00\x06\x00\x00\x00\x95", 81)); NONFAILING(*(uint64_t*)0x200000d0 = 0x20000000); NONFAILING(memcpy((void*)0x20000000, "GPL\000", 4)); NONFAILING(*(uint32_t*)0x200000d8 = 0); NONFAILING(*(uint32_t*)0x200000dc = 0); NONFAILING(*(uint64_t*)0x200000e0 = 0); NONFAILING(*(uint32_t*)0x200000e8 = 0); NONFAILING(*(uint32_t*)0x200000ec = 0); NONFAILING(memset((void*)0x200000f0, 0, 16)); NONFAILING(*(uint32_t*)0x20000100 = 0); NONFAILING(*(uint32_t*)0x20000104 = 0); NONFAILING(*(uint32_t*)0x20000108 = -1); NONFAILING(*(uint32_t*)0x2000010c = 0); NONFAILING(*(uint64_t*)0x20000110 = 0); NONFAILING(*(uint32_t*)0x20000118 = 0); NONFAILING(*(uint32_t*)0x2000011c = 0); NONFAILING(*(uint64_t*)0x20000120 = 0); NONFAILING(*(uint32_t*)0x20000128 = 0); NONFAILING(*(uint32_t*)0x2000012c = 0); NONFAILING(*(uint32_t*)0x20000130 = 0); NONFAILING(*(uint32_t*)0x20000134 = 0); NONFAILING(*(uint64_t*)0x20000138 = 0); NONFAILING(*(uint64_t*)0x20000140 = 0); NONFAILING(*(uint32_t*)0x20000148 = 0); NONFAILING(*(uint32_t*)0x2000014c = 0); res = syscall(__NR_bpf, /*cmd=*/5ul, /*arg=*/0x200000c0ul, /*size=*/0x90ul); if (res != -1) r[2] = res; break; case 4: NONFAILING(*(uint32_t*)0x20000240 = r[2]); NONFAILING(*(uint32_t*)0x20000244 = 0x23000002); NONFAILING(*(uint32_t*)0x20000248 = 0); NONFAILING(*(uint32_t*)0x2000024c = 0x2000000); NONFAILING(*(uint64_t*)0x20000250 = 0); NONFAILING(*(uint64_t*)0x20000258 = 0); NONFAILING(*(uint32_t*)0x20000260 = 0); NONFAILING(*(uint32_t*)0x20000264 = 0); NONFAILING(*(uint32_t*)0x20000268 = 0); NONFAILING(*(uint32_t*)0x2000026c = 0); NONFAILING(*(uint64_t*)0x20000270 = 0); NONFAILING(*(uint64_t*)0x20000278 = 0); NONFAILING(*(uint32_t*)0x20000280 = 2); NONFAILING(*(uint32_t*)0x20000284 = 0); NONFAILING(*(uint32_t*)0x20000288 = 0); syscall(__NR_bpf, /*cmd=*/0xaul, /*arg=*/0x20000240ul, /*size=*/0x50ul); break; } } int main(void) { syscall(__NR_mmap, /*addr=*/0x1ffff000ul, /*len=*/0x1000ul, /*prot=*/0ul, /*flags=MAP_FIXED|MAP_ANONYMOUS|MAP_PRIVATE*/ 0x32ul, /*fd=*/-1, /*offset=*/0ul); syscall(__NR_mmap, /*addr=*/0x20000000ul, /*len=*/0x1000000ul, /*prot=PROT_WRITE|PROT_READ|PROT_EXEC*/ 7ul, /*flags=MAP_FIXED|MAP_ANONYMOUS|MAP_PRIVATE*/ 0x32ul, /*fd=*/-1, /*offset=*/0ul); syscall(__NR_mmap, /*addr=*/0x21000000ul, /*len=*/0x1000ul, /*prot=*/0ul, /*flags=MAP_FIXED|MAP_ANONYMOUS|MAP_PRIVATE*/ 0x32ul, /*fd=*/-1, /*offset=*/0ul); setup_sysctl(); setup_swap(); install_segv_handler(); do_sandbox_none(); return 0; }