| // WARNING in reuseport_add_sock |
| // https://syzkaller.appspot.com/bug?id=35f812a0e2c0282e40450d4dbaf6f9c5f90924d7 |
| // status:open |
| // autogenerated by syzkaller (http://github.com/google/syzkaller) |
| |
| #define _GNU_SOURCE |
| #include <endian.h> |
| #include <linux/futex.h> |
| #include <pthread.h> |
| #include <stdint.h> |
| #include <stdlib.h> |
| #include <string.h> |
| #include <sys/syscall.h> |
| #include <unistd.h> |
| |
| 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_setsockopt |
| #define __NR_setsockopt 366 |
| #endif |
| #ifndef __NR_bind |
| #define __NR_bind 361 |
| #endif |
| #ifndef __NR_listen |
| #define __NR_listen 363 |
| #endif |
| #ifndef __NR_mmap |
| #define __NR_mmap 192 |
| #endif |
| #ifndef __NR_socket |
| #define __NR_socket 359 |
| #endif |
| #undef __NR_mmap |
| #define __NR_mmap __NR_mmap2 |
| |
| long r[1]; |
| void execute_call(int call) |
| { |
| switch (call) { |
| case 0: |
| syscall(__NR_mmap, 0x20000000, 0xfff000, 3, 0x32, -1, 0); |
| break; |
| case 1: |
| r[0] = syscall(__NR_socket, 2, 1, 0); |
| break; |
| case 2: |
| syscall(__NR_socket, 2, 1, 0); |
| break; |
| case 3: |
| *(uint32_t*)0x2056effc = 1; |
| syscall(__NR_setsockopt, r[0], 6, 0x13, 0x2056effc, 4); |
| break; |
| case 4: |
| *(uint32_t*)0x20f11000 = 0xffffff40; |
| syscall(__NR_setsockopt, r[0], 1, 0xf, 0x20f11000, 4); |
| break; |
| case 5: |
| *(uint16_t*)0x20e15000 = 2; |
| *(uint16_t*)0x20e15002 = htobe16(0x4e20); |
| *(uint32_t*)0x20e15004 = htobe32(0); |
| *(uint8_t*)0x20e15008 = 0; |
| *(uint8_t*)0x20e15009 = 0; |
| *(uint8_t*)0x20e1500a = 0; |
| *(uint8_t*)0x20e1500b = 0; |
| *(uint8_t*)0x20e1500c = 0; |
| *(uint8_t*)0x20e1500d = 0; |
| *(uint8_t*)0x20e1500e = 0; |
| *(uint8_t*)0x20e1500f = 0; |
| syscall(__NR_bind, r[0], 0x20e15000, 0x10); |
| break; |
| case 6: |
| *(uint16_t*)0x200a2000 = 1; |
| *(uint32_t*)0x200a2004 = 0x20f07000; |
| *(uint16_t*)0x20f07000 = 6; |
| *(uint8_t*)0x20f07002 = 0; |
| *(uint8_t*)0x20f07003 = 0; |
| *(uint32_t*)0x20f07004 = 0; |
| syscall(__NR_setsockopt, r[0], 1, 0x33, 0x200a2000, 0x10); |
| break; |
| case 7: |
| syscall(__NR_listen, r[0], 0); |
| break; |
| } |
| } |
| |
| void test() |
| { |
| memset(r, -1, sizeof(r)); |
| execute(8); |
| collide = 1; |
| execute(8); |
| } |
| |
| int main() |
| { |
| for (;;) { |
| loop(); |
| } |
| } |