// https://syzkaller.appspot.com/bug?id=dd1775fe6aff9938c1a431932664fa05f07d363c // autogenerated by syzkaller (http://github.com/google/syzkaller) #define _GNU_SOURCE #include #include #include #include #include #include #include #include static void test(); void loop() { while (1) { test(); } } 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 (running) usleep((call == num_calls - 1) ? 10000 : 1000); break; } } } } #ifndef __NR_memfd_create #define __NR_memfd_create 356 #endif #ifndef __NR_getsockopt #define __NR_getsockopt 365 #endif #ifndef __NR_socket #define __NR_socket 359 #endif #ifndef __NR_connect #define __NR_connect 362 #endif #ifndef __NR_dup2 #define __NR_dup2 63 #endif #ifndef __NR_mmap #define __NR_mmap 192 #endif #ifndef __NR_openat #define __NR_openat 295 #endif #ifndef __NR_keyctl #define __NR_keyctl 288 #endif #ifndef __NR_wait4 #define __NR_wait4 114 #endif #ifndef __NR_close #define __NR_close 6 #endif #ifndef __NR_request_key #define __NR_request_key 287 #endif #ifndef __NR_ioctl #define __NR_ioctl 54 #endif #ifndef __NR_setsockopt #define __NR_setsockopt 366 #endif #undef __NR_mmap #define __NR_mmap __NR_mmap2 long r[9]; void execute_call(int call) { switch (call) { case 0: syscall(__NR_mmap, 0x20000000, 0xe7d000, 3, 0x32, -1, 0); break; case 1: memcpy((void*)0x20e7a000, "ceph", 5); *(uint8_t*)0x2052d000 = 0x73; *(uint8_t*)0x2052d001 = 0x79; *(uint8_t*)0x2052d002 = 0x7a; *(uint8_t*)0x2052d003 = 0x23; *(uint8_t*)0x2052d004 = 0; memcpy((void*)0x20e7a000, "bdev/", 6); r[0] = syscall(__NR_request_key, 0x20e7a000, 0x2052d000, 0x20e7a000, -1); break; case 2: memcpy((void*)0x20aa2ff6, "blacklist", 10); *(uint8_t*)0x20e7affb = 0x73; *(uint8_t*)0x20e7affc = 0x79; *(uint8_t*)0x20e7affd = 0x7a; *(uint8_t*)0x20e7affe = 0x20; *(uint8_t*)0x20e7afff = 0; memcpy((void*)0x20821fff, "", 1); r[1] = syscall(__NR_request_key, 0x20aa2ff6, 0x20e7affb, 0x20821fff, 0xfffffffd); break; case 3: syscall(__NR_mmap, 0x20e7d000, 0x1000, 3, 0x32, -1, 0); break; case 4: memcpy((void*)0x20e7dff8, "./file0", 8); r[2] = syscall(__NR_openat, 0xffffff9c, 0x20e7dff8, 0x503480, 5); break; case 5: memcpy((void*)0x2044eff6, "blacklist", 10); syscall(__NR_ioctl, r[2], 0x40082406, 0x2044eff6); break; case 6: syscall(__NR_keyctl, 0xc, r[0], 0x20b7df17, 0, r[1]); break; case 7: syscall(__NR_mmap, 0x20e7e000, 0x1000, 3, 0x32, -1, 0); break; case 8: syscall(__NR_mmap, 0x20e7e000, 0x1000, 3, 0x32, -1, 0); break; case 9: memcpy((void*)0x2066b000, "\x63\x65\x70\x83\x00\x3b", 6); r[3] = syscall(__NR_memfd_create, 0x2066b000, 3); break; case 10: *(uint32_t*)0x20000000 = 0; syscall(__NR_setsockopt, r[3], 0x11, 1, 0x20000000, 4); break; case 11: *(uint32_t*)0x20e7c000 = 0xc; if (syscall(__NR_getsockopt, r[3], 1, 0x11, 0x20e7c000, 0x20e7c000) != -1) r[4] = *(uint32_t*)0x20e7c000; break; case 12: syscall(__NR_wait4, r[4], 0x20b17ffc, 0x41000000, 0x20e7cf70); break; case 13: *(uint32_t*)0x20e7bff0 = 0x2090b000; *(uint64_t*)0x20e7bff8 = 0x2000; syscall(__NR_ioctl, r[3], 0xc020aa04, 0x20e7bff0); break; case 14: syscall(__NR_ioctl, r[3], 0x8004745a, 0x200e0ffd); break; case 15: syscall(__NR_ioctl, r[2], 0x6430); break; case 16: syscall(__NR_ioctl, r[2], 0x4c00, r[3]); break; case 17: r[5] = syscall(__NR_ioctl, r[3], 0x4c82); break; case 18: syscall(__NR_ioctl, r[3], 0x4c81, r[5]); break; case 19: r[6] = syscall(__NR_socket, 0xa, 2, 0); break; case 20: r[7] = syscall(__NR_socket, 0x18, 1, 1); break; case 21: *(uint16_t*)0x20e71000 = 0x18; *(uint32_t*)0x20e71002 = 1; *(uint32_t*)0x20e71006 = 0; *(uint32_t*)0x20e7100a = r[6]; *(uint16_t*)0x20e7100e = 3; *(uint16_t*)0x20e71010 = 0; *(uint16_t*)0x20e71012 = 3; *(uint16_t*)0x20e71014 = 0; *(uint16_t*)0x20e71016 = 0xa; *(uint16_t*)0x20e71018 = htobe16(0x4e22); *(uint32_t*)0x20e7101a = 3; *(uint8_t*)0x20e7101e = 0xfe; *(uint8_t*)0x20e7101f = 0x80; *(uint8_t*)0x20e71020 = 0; *(uint8_t*)0x20e71021 = 0; *(uint8_t*)0x20e71022 = 0; *(uint8_t*)0x20e71023 = 0; *(uint8_t*)0x20e71024 = 0; *(uint8_t*)0x20e71025 = 0; *(uint8_t*)0x20e71026 = 0; *(uint8_t*)0x20e71027 = 0; *(uint8_t*)0x20e71028 = 0; *(uint8_t*)0x20e71029 = 0; *(uint8_t*)0x20e7102a = 0; *(uint8_t*)0x20e7102b = 0; *(uint8_t*)0x20e7102c = 0; *(uint8_t*)0x20e7102d = 0xbb; *(uint32_t*)0x20e7102e = 4; syscall(__NR_connect, r[7], 0x20e71000, 0x32); break; case 22: r[8] = syscall(__NR_socket, 0x18, 1, 1); break; case 23: syscall(__NR_close, r[6]); break; case 24: syscall(__NR_dup2, r[8], r[7]); break; } } void test() { memset(r, -1, sizeof(r)); execute(25); collide = 1; execute(25); } int main() { for (;;) { loop(); } }