| // general protection fault in bpf_tcp_close (2) |
| // https://syzkaller.appspot.com/bug?id=50e6f582ccc13e995abdad2ecdefed35f91bebad |
| // status:open |
| // autogenerated by syzkaller (http://github.com/google/syzkaller) |
| |
| #define _GNU_SOURCE |
| #include <endian.h> |
| #include <errno.h> |
| #include <linux/futex.h> |
| #include <pthread.h> |
| #include <signal.h> |
| #include <stdarg.h> |
| #include <stdio.h> |
| #include <stdlib.h> |
| #include <sys/prctl.h> |
| #include <sys/syscall.h> |
| #include <sys/time.h> |
| #include <sys/wait.h> |
| #include <time.h> |
| #include <unistd.h> |
| |
| __attribute__((noreturn)) static void doexit(int status) |
| { |
| volatile unsigned i; |
| syscall(__NR_exit_group, status); |
| for (i = 0;; i++) { |
| } |
| } |
| #include <errno.h> |
| #include <stdarg.h> |
| #include <stdint.h> |
| #include <stdio.h> |
| #include <string.h> |
| |
| const int kFailStatus = 67; |
| const int kRetryStatus = 69; |
| |
| static void fail(const char* msg, ...) |
| { |
| int e = errno; |
| va_list args; |
| va_start(args, msg); |
| vfprintf(stderr, msg, args); |
| va_end(args); |
| fprintf(stderr, " (errno %d)\n", e); |
| doexit((e == ENOMEM || e == EAGAIN) ? kRetryStatus : kFailStatus); |
| } |
| |
| #define BITMASK_LEN(type, bf_len) (type)((1ull << (bf_len)) - 1) |
| |
| #define BITMASK_LEN_OFF(type, bf_off, bf_len) \ |
| (type)(BITMASK_LEN(type, (bf_len)) << (bf_off)) |
| |
| #define STORE_BY_BITMASK(type, addr, val, bf_off, bf_len) \ |
| if ((bf_off) == 0 && (bf_len) == 0) { \ |
| *(type*)(addr) = (type)(val); \ |
| } else { \ |
| type new_val = *(type*)(addr); \ |
| new_val &= ~BITMASK_LEN_OFF(type, (bf_off), (bf_len)); \ |
| new_val |= ((type)(val)&BITMASK_LEN(type, (bf_len))) << (bf_off); \ |
| *(type*)(addr) = new_val; \ |
| } |
| |
| static uint64_t current_time_ms() |
| { |
| struct timespec ts; |
| |
| if (clock_gettime(CLOCK_MONOTONIC, &ts)) |
| fail("clock_gettime failed"); |
| return (uint64_t)ts.tv_sec * 1000 + (uint64_t)ts.tv_nsec / 1000000; |
| } |
| |
| static void execute_one(); |
| extern unsigned long long procid; |
| |
| static void loop() |
| { |
| int iter; |
| for (iter = 0;; iter++) { |
| int pid = fork(); |
| if (pid < 0) |
| fail("clone failed"); |
| if (pid == 0) { |
| prctl(PR_SET_PDEATHSIG, SIGKILL, 0, 0, 0); |
| setpgrp(); |
| execute_one(); |
| int fd; |
| for (fd = 3; fd < 30; fd++) |
| close(fd); |
| doexit(0); |
| } |
| |
| int status = 0; |
| uint64_t start = current_time_ms(); |
| for (;;) { |
| int res = waitpid(-1, &status, __WALL | WNOHANG); |
| if (res == pid) { |
| break; |
| } |
| usleep(1000); |
| if (current_time_ms() - start < 5 * 1000) |
| continue; |
| kill(-pid, SIGKILL); |
| kill(pid, SIGKILL); |
| while (waitpid(-1, &status, __WALL) != pid) { |
| } |
| break; |
| } |
| } |
| } |
| |
| struct thread_t { |
| int created, running, call; |
| pthread_t th; |
| }; |
| |
| static struct thread_t threads[16]; |
| static void execute_call(int call); |
| static int running; |
| static int collide; |
| |
| static void* thr(void* arg) |
| { |
| struct thread_t* th = (struct thread_t*)arg; |
| for (;;) { |
| while (!__atomic_load_n(&th->running, __ATOMIC_ACQUIRE)) |
| syscall(SYS_futex, &th->running, FUTEX_WAIT, 0, 0); |
| execute_call(th->call); |
| __atomic_fetch_sub(&running, 1, __ATOMIC_RELAXED); |
| __atomic_store_n(&th->running, 0, __ATOMIC_RELEASE); |
| syscall(SYS_futex, &th->running, FUTEX_WAKE); |
| } |
| return 0; |
| } |
| |
| static void execute(int num_calls) |
| { |
| int call, thread; |
| running = 0; |
| for (call = 0; call < num_calls; call++) { |
| for (thread = 0; thread < sizeof(threads) / sizeof(threads[0]); thread++) { |
| struct thread_t* th = &threads[thread]; |
| if (!th->created) { |
| th->created = 1; |
| pthread_attr_t attr; |
| pthread_attr_init(&attr); |
| pthread_attr_setstacksize(&attr, 128 << 10); |
| pthread_create(&th->th, &attr, thr, th); |
| } |
| if (!__atomic_load_n(&th->running, __ATOMIC_ACQUIRE)) { |
| th->call = call; |
| __atomic_fetch_add(&running, 1, __ATOMIC_RELAXED); |
| __atomic_store_n(&th->running, 1, __ATOMIC_RELEASE); |
| syscall(SYS_futex, &th->running, FUTEX_WAKE); |
| if (collide && call % 2) |
| break; |
| struct timespec ts; |
| ts.tv_sec = 0; |
| ts.tv_nsec = 20 * 1000 * 1000; |
| syscall(SYS_futex, &th->running, FUTEX_WAIT, 1, &ts); |
| if (__atomic_load_n(&running, __ATOMIC_RELAXED)) |
| usleep((call == num_calls - 1) ? 10000 : 1000); |
| break; |
| } |
| } |
| } |
| } |
| |
| #ifndef __NR_bpf |
| #define __NR_bpf 321 |
| #endif |
| |
| uint64_t r[5] = {0xffffffffffffffff, 0xffffffffffffffff, 0xffffffffffffffff, |
| 0x0, 0x0}; |
| void execute_call(int call) |
| { |
| long res; |
| switch (call) { |
| case 0: |
| *(uint32_t*)0x20000200 = 2; |
| *(uint32_t*)0x20000204 = 0x70; |
| *(uint8_t*)0x20000208 = 0xe6; |
| *(uint8_t*)0x20000209 = 0; |
| *(uint8_t*)0x2000020a = 0; |
| *(uint8_t*)0x2000020b = 0; |
| *(uint32_t*)0x2000020c = 0; |
| *(uint64_t*)0x20000210 = 0; |
| *(uint64_t*)0x20000218 = 0; |
| *(uint64_t*)0x20000220 = 0; |
| STORE_BY_BITMASK(uint64_t, 0x20000228, 0, 0, 1); |
| STORE_BY_BITMASK(uint64_t, 0x20000228, 0, 1, 1); |
| STORE_BY_BITMASK(uint64_t, 0x20000228, 0, 2, 1); |
| STORE_BY_BITMASK(uint64_t, 0x20000228, 0, 3, 1); |
| STORE_BY_BITMASK(uint64_t, 0x20000228, 0, 4, 1); |
| STORE_BY_BITMASK(uint64_t, 0x20000228, 0, 5, 1); |
| STORE_BY_BITMASK(uint64_t, 0x20000228, 0, 6, 1); |
| STORE_BY_BITMASK(uint64_t, 0x20000228, 0, 7, 1); |
| STORE_BY_BITMASK(uint64_t, 0x20000228, 0, 8, 1); |
| STORE_BY_BITMASK(uint64_t, 0x20000228, 0, 9, 1); |
| STORE_BY_BITMASK(uint64_t, 0x20000228, 0, 10, 1); |
| STORE_BY_BITMASK(uint64_t, 0x20000228, 0, 11, 1); |
| STORE_BY_BITMASK(uint64_t, 0x20000228, 0, 12, 1); |
| STORE_BY_BITMASK(uint64_t, 0x20000228, 0, 13, 1); |
| STORE_BY_BITMASK(uint64_t, 0x20000228, 0, 14, 1); |
| STORE_BY_BITMASK(uint64_t, 0x20000228, 0, 15, 2); |
| STORE_BY_BITMASK(uint64_t, 0x20000228, 0, 17, 1); |
| STORE_BY_BITMASK(uint64_t, 0x20000228, 0, 18, 1); |
| STORE_BY_BITMASK(uint64_t, 0x20000228, 0, 19, 1); |
| STORE_BY_BITMASK(uint64_t, 0x20000228, 0, 20, 1); |
| STORE_BY_BITMASK(uint64_t, 0x20000228, 0, 21, 1); |
| STORE_BY_BITMASK(uint64_t, 0x20000228, 0, 22, 1); |
| STORE_BY_BITMASK(uint64_t, 0x20000228, 0, 23, 1); |
| STORE_BY_BITMASK(uint64_t, 0x20000228, 0, 24, 1); |
| STORE_BY_BITMASK(uint64_t, 0x20000228, 0, 25, 1); |
| STORE_BY_BITMASK(uint64_t, 0x20000228, 0, 26, 1); |
| STORE_BY_BITMASK(uint64_t, 0x20000228, 0, 27, 1); |
| STORE_BY_BITMASK(uint64_t, 0x20000228, 0, 28, 1); |
| STORE_BY_BITMASK(uint64_t, 0x20000228, 0, 29, 35); |
| *(uint32_t*)0x20000230 = 0; |
| *(uint32_t*)0x20000234 = 0; |
| *(uint64_t*)0x20000238 = 0; |
| *(uint64_t*)0x20000240 = 0; |
| *(uint64_t*)0x20000248 = 0; |
| *(uint64_t*)0x20000250 = 0; |
| *(uint32_t*)0x20000258 = 0; |
| *(uint32_t*)0x2000025c = 0; |
| *(uint64_t*)0x20000260 = 0; |
| *(uint32_t*)0x20000268 = 0; |
| *(uint16_t*)0x2000026c = 0; |
| *(uint16_t*)0x2000026e = 0; |
| res = syscall(__NR_perf_event_open, 0x20000200, 0, 0, -1, 0); |
| if (res != -1) |
| r[0] = res; |
| break; |
| case 1: |
| *(uint32_t*)0x20000a40 = -1; |
| syscall(__NR_setsockopt, -1, 0x29, 0x24, 0x20000a40, 0x173); |
| break; |
| case 2: |
| res = syscall(__NR_socketpair, 0, 0, 0, 0x20000140); |
| if (res != -1) |
| r[1] = *(uint32_t*)0x20000144; |
| break; |
| case 3: |
| syscall(__NR_socket, 0xa, 1, 0); |
| break; |
| case 4: |
| *(uint32_t*)0x20000280 = 0x12; |
| *(uint32_t*)0x20000284 = 9; |
| *(uint32_t*)0x20000288 = 4; |
| *(uint32_t*)0x2000028c = 1; |
| *(uint32_t*)0x20000290 = 0; |
| *(uint32_t*)0x20000294 = -1; |
| *(uint32_t*)0x20000298 = 0; |
| *(uint8_t*)0x2000029c = 0; |
| *(uint8_t*)0x2000029d = 0; |
| *(uint8_t*)0x2000029e = 0; |
| *(uint8_t*)0x2000029f = 0; |
| *(uint8_t*)0x200002a0 = 0; |
| *(uint8_t*)0x200002a1 = 0; |
| *(uint8_t*)0x200002a2 = 0; |
| *(uint8_t*)0x200002a3 = 0; |
| *(uint8_t*)0x200002a4 = 0; |
| *(uint8_t*)0x200002a5 = 0; |
| *(uint8_t*)0x200002a6 = 0; |
| *(uint8_t*)0x200002a7 = 0; |
| *(uint8_t*)0x200002a8 = 0; |
| *(uint8_t*)0x200002a9 = 0; |
| *(uint8_t*)0x200002aa = 0; |
| *(uint8_t*)0x200002ab = 0; |
| res = syscall(__NR_bpf, 0, 0x20000280, 0x34d); |
| if (res != -1) |
| r[2] = res; |
| break; |
| case 5: |
| res = syscall(__NR_getpid); |
| if (res != -1) |
| r[3] = res; |
| break; |
| case 6: |
| *(uint32_t*)0x200002c0 = 0; |
| *(uint32_t*)0x200002c4 = 0x70; |
| *(uint8_t*)0x200002c8 = 0; |
| *(uint8_t*)0x200002c9 = 4; |
| *(uint8_t*)0x200002ca = -1; |
| *(uint8_t*)0x200002cb = 0x69; |
| *(uint32_t*)0x200002cc = 0; |
| *(uint64_t*)0x200002d0 = 0x80000001; |
| *(uint64_t*)0x200002d8 = 0x20; |
| *(uint64_t*)0x200002e0 = 8; |
| STORE_BY_BITMASK(uint64_t, 0x200002e8, 6, 0, 1); |
| STORE_BY_BITMASK(uint64_t, 0x200002e8, 0x24, 1, 1); |
| STORE_BY_BITMASK(uint64_t, 0x200002e8, 4, 2, 1); |
| STORE_BY_BITMASK(uint64_t, 0x200002e8, 0x10001, 3, 1); |
| STORE_BY_BITMASK(uint64_t, 0x200002e8, 0, 4, 1); |
| STORE_BY_BITMASK(uint64_t, 0x200002e8, 0xa0, 5, 1); |
| STORE_BY_BITMASK(uint64_t, 0x200002e8, 0xad7, 6, 1); |
| STORE_BY_BITMASK(uint64_t, 0x200002e8, 4, 7, 1); |
| STORE_BY_BITMASK(uint64_t, 0x200002e8, 2, 8, 1); |
| STORE_BY_BITMASK(uint64_t, 0x200002e8, 3, 9, 1); |
| STORE_BY_BITMASK(uint64_t, 0x200002e8, 0x7ff, 10, 1); |
| STORE_BY_BITMASK(uint64_t, 0x200002e8, 3, 11, 1); |
| STORE_BY_BITMASK(uint64_t, 0x200002e8, 0xff3, 12, 1); |
| STORE_BY_BITMASK(uint64_t, 0x200002e8, 0, 13, 1); |
| STORE_BY_BITMASK(uint64_t, 0x200002e8, 8, 14, 1); |
| STORE_BY_BITMASK(uint64_t, 0x200002e8, 0x3f, 15, 2); |
| STORE_BY_BITMASK(uint64_t, 0x200002e8, 0x3ff, 17, 1); |
| STORE_BY_BITMASK(uint64_t, 0x200002e8, 9, 18, 1); |
| STORE_BY_BITMASK(uint64_t, 0x200002e8, 0x7fffffff, 19, 1); |
| STORE_BY_BITMASK(uint64_t, 0x200002e8, 1, 20, 1); |
| STORE_BY_BITMASK(uint64_t, 0x200002e8, 1, 21, 1); |
| STORE_BY_BITMASK(uint64_t, 0x200002e8, 3, 22, 1); |
| STORE_BY_BITMASK(uint64_t, 0x200002e8, 3, 23, 1); |
| STORE_BY_BITMASK(uint64_t, 0x200002e8, 0xffffffffffff8000, 24, 1); |
| STORE_BY_BITMASK(uint64_t, 0x200002e8, 0x80000000, 25, 1); |
| STORE_BY_BITMASK(uint64_t, 0x200002e8, 0x8000, 26, 1); |
| STORE_BY_BITMASK(uint64_t, 0x200002e8, 0, 27, 1); |
| STORE_BY_BITMASK(uint64_t, 0x200002e8, 5, 28, 1); |
| STORE_BY_BITMASK(uint64_t, 0x200002e8, 0, 29, 35); |
| *(uint32_t*)0x200002f0 = 2; |
| *(uint32_t*)0x200002f4 = 1; |
| *(uint64_t*)0x200002f8 = 0x200001c0; |
| *(uint64_t*)0x20000300 = 2; |
| *(uint64_t*)0x20000308 = 0x28148; |
| *(uint64_t*)0x20000310 = 1; |
| *(uint32_t*)0x20000318 = 0x562; |
| *(uint32_t*)0x2000031c = 4; |
| *(uint64_t*)0x20000320 = 0x10000; |
| *(uint32_t*)0x20000328 = 0x7fff; |
| *(uint16_t*)0x2000032c = 5; |
| *(uint16_t*)0x2000032e = 0; |
| syscall(__NR_perf_event_open, 0x200002c0, r[3], 4, r[0], 3); |
| break; |
| case 7: |
| *(uint32_t*)0x20000100 = 7; |
| *(uint32_t*)0x20000104 = 0xffffffa3; |
| *(uint32_t*)0x20000108 = 0x400; |
| *(uint32_t*)0x2000010c = 0xfffff87f; |
| *(uint32_t*)0x20000110 = 0x30; |
| *(uint32_t*)0x20000114 = r[1]; |
| *(uint32_t*)0x20000118 = 8; |
| *(uint8_t*)0x2000011c = 0; |
| *(uint8_t*)0x2000011d = 0; |
| *(uint8_t*)0x2000011e = 0; |
| *(uint8_t*)0x2000011f = 0; |
| *(uint8_t*)0x20000120 = 0; |
| *(uint8_t*)0x20000121 = 0; |
| *(uint8_t*)0x20000122 = 0; |
| *(uint8_t*)0x20000123 = 0; |
| *(uint8_t*)0x20000124 = 0; |
| *(uint8_t*)0x20000125 = 0; |
| *(uint8_t*)0x20000126 = 0; |
| *(uint8_t*)0x20000127 = 0; |
| *(uint8_t*)0x20000128 = 0; |
| *(uint8_t*)0x20000129 = 0; |
| *(uint8_t*)0x2000012a = 0; |
| *(uint8_t*)0x2000012b = 0; |
| syscall(__NR_bpf, 0, 0x20000100, 0x2c); |
| break; |
| case 8: |
| *(uint32_t*)0x20000000 = 0; |
| *(uint32_t*)0x20000004 = 0; |
| *(uint32_t*)0x20000008 = 4; |
| *(uint32_t*)0x2000000c = 0; |
| *(uint32_t*)0x20000010 = 0; |
| *(uint32_t*)0x20000014 = -1; |
| *(uint32_t*)0x20000018 = 0; |
| *(uint8_t*)0x2000001c = 0; |
| *(uint8_t*)0x2000001d = 0; |
| *(uint8_t*)0x2000001e = 0; |
| *(uint8_t*)0x2000001f = 0; |
| *(uint8_t*)0x20000020 = 0; |
| *(uint8_t*)0x20000021 = 0; |
| *(uint8_t*)0x20000022 = 0; |
| *(uint8_t*)0x20000023 = 0; |
| *(uint8_t*)0x20000024 = 0; |
| *(uint8_t*)0x20000025 = 0; |
| *(uint8_t*)0x20000026 = 0; |
| *(uint8_t*)0x20000027 = 0; |
| *(uint8_t*)0x20000028 = 0; |
| *(uint8_t*)0x20000029 = 0; |
| *(uint8_t*)0x2000002a = 0; |
| *(uint8_t*)0x2000002b = 0; |
| syscall(__NR_bpf, 0, 0x20000000, 0xce); |
| break; |
| case 9: |
| res = syscall(__NR_gettid); |
| if (res != -1) |
| r[4] = res; |
| break; |
| case 10: |
| *(uint32_t*)0x20000080 = 3; |
| *(uint32_t*)0x20000084 = 0x70; |
| *(uint8_t*)0x20000088 = -1; |
| *(uint8_t*)0x20000089 = 6; |
| *(uint8_t*)0x2000008a = 1; |
| *(uint8_t*)0x2000008b = 0; |
| *(uint32_t*)0x2000008c = 0; |
| *(uint64_t*)0x20000090 = 0x80; |
| *(uint64_t*)0x20000098 = 0x20216; |
| *(uint64_t*)0x200000a0 = 4; |
| STORE_BY_BITMASK(uint64_t, 0x200000a8, 0x2f4e, 0, 1); |
| STORE_BY_BITMASK(uint64_t, 0x200000a8, 1, 1, 1); |
| STORE_BY_BITMASK(uint64_t, 0x200000a8, 2, 2, 1); |
| STORE_BY_BITMASK(uint64_t, 0x200000a8, 0xfffffffffffffc01, 3, 1); |
| STORE_BY_BITMASK(uint64_t, 0x200000a8, 9, 4, 1); |
| STORE_BY_BITMASK(uint64_t, 0x200000a8, 5, 5, 1); |
| STORE_BY_BITMASK(uint64_t, 0x200000a8, 0x20, 6, 1); |
| STORE_BY_BITMASK(uint64_t, 0x200000a8, 7, 7, 1); |
| STORE_BY_BITMASK(uint64_t, 0x200000a8, 4, 8, 1); |
| STORE_BY_BITMASK(uint64_t, 0x200000a8, 8, 9, 1); |
| STORE_BY_BITMASK(uint64_t, 0x200000a8, 0x101, 10, 1); |
| STORE_BY_BITMASK(uint64_t, 0x200000a8, 0, 11, 1); |
| STORE_BY_BITMASK(uint64_t, 0x200000a8, 9, 12, 1); |
| STORE_BY_BITMASK(uint64_t, 0x200000a8, 0x3b4a, 13, 1); |
| STORE_BY_BITMASK(uint64_t, 0x200000a8, 8, 14, 1); |
| STORE_BY_BITMASK(uint64_t, 0x200000a8, 0x8c3, 15, 2); |
| STORE_BY_BITMASK(uint64_t, 0x200000a8, 8, 17, 1); |
| STORE_BY_BITMASK(uint64_t, 0x200000a8, 0x83, 18, 1); |
| STORE_BY_BITMASK(uint64_t, 0x200000a8, 0x81, 19, 1); |
| STORE_BY_BITMASK(uint64_t, 0x200000a8, 0x7f, 20, 1); |
| STORE_BY_BITMASK(uint64_t, 0x200000a8, 4, 21, 1); |
| STORE_BY_BITMASK(uint64_t, 0x200000a8, 1, 22, 1); |
| STORE_BY_BITMASK(uint64_t, 0x200000a8, 1, 23, 1); |
| STORE_BY_BITMASK(uint64_t, 0x200000a8, 1, 24, 1); |
| STORE_BY_BITMASK(uint64_t, 0x200000a8, 3, 25, 1); |
| STORE_BY_BITMASK(uint64_t, 0x200000a8, 0x100, 26, 1); |
| STORE_BY_BITMASK(uint64_t, 0x200000a8, 0xfffffffffffffffd, 27, 1); |
| STORE_BY_BITMASK(uint64_t, 0x200000a8, 0, 28, 1); |
| STORE_BY_BITMASK(uint64_t, 0x200000a8, 0, 29, 35); |
| *(uint32_t*)0x200000b0 = 0x7fffffff; |
| *(uint32_t*)0x200000b4 = 5; |
| *(uint64_t*)0x200000b8 = 0x20000040; |
| *(uint64_t*)0x200000c0 = 4; |
| *(uint64_t*)0x200000c8 = 0x1000; |
| *(uint64_t*)0x200000d0 = 7; |
| *(uint32_t*)0x200000d8 = 4; |
| *(uint32_t*)0x200000dc = 6; |
| *(uint64_t*)0x200000e0 = 2; |
| *(uint32_t*)0x200000e8 = 0x1f; |
| *(uint16_t*)0x200000ec = 0x400; |
| *(uint16_t*)0x200000ee = 0; |
| syscall(__NR_perf_event_open, 0x20000080, r[4], 9, r[0], 8); |
| break; |
| case 11: |
| *(uint32_t*)0x20000180 = r[2]; |
| *(uint64_t*)0x20000188 = 0x20000000; |
| *(uint64_t*)0x20000190 = 0x20000140; |
| *(uint64_t*)0x20000198 = 0; |
| syscall(__NR_bpf, 2, 0x20000180, 0x20); |
| break; |
| } |
| } |
| |
| void execute_one() |
| { |
| execute(12); |
| collide = 1; |
| execute(12); |
| } |
| |
| int main() |
| { |
| syscall(__NR_mmap, 0x20000000, 0x1000000, 3, 0x32, -1, 0); |
| for (;;) { |
| loop(); |
| } |
| } |
