| // possible deadlock in smc_close_non_accepted |
| // https://syzkaller.appspot.com/bug?id=aa3dcb8dc275eeec3958f09873547b76ae4434de |
| // status:fixed |
| // 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> |
| |
| 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; |
| } |
| } |
| } |
| } |
| |
| uint64_t r[1] = {0xffffffffffffffff}; |
| void execute_call(int call) |
| { |
| long res; |
| switch (call) { |
| case 0: |
| res = syscall(__NR_socket, 0x2b, 1, 0); |
| if (res != -1) |
| r[0] = res; |
| break; |
| case 1: |
| *(uint16_t*)0x20000040 = 2; |
| *(uint16_t*)0x20000042 = htobe16(0x4e23); |
| *(uint32_t*)0x20000044 = htobe32(0x7f000001); |
| *(uint8_t*)0x20000048 = 0; |
| *(uint8_t*)0x20000049 = 0; |
| *(uint8_t*)0x2000004a = 0; |
| *(uint8_t*)0x2000004b = 0; |
| *(uint8_t*)0x2000004c = 0; |
| *(uint8_t*)0x2000004d = 0; |
| *(uint8_t*)0x2000004e = 0; |
| *(uint8_t*)0x2000004f = 0; |
| syscall(__NR_connect, r[0], 0x20000040, 0x10); |
| break; |
| case 2: |
| *(uint16_t*)0x20000000 = 2; |
| *(uint16_t*)0x20000002 = htobe16(0x4e23); |
| *(uint32_t*)0x20000004 = htobe32(0); |
| *(uint8_t*)0x20000008 = 0; |
| *(uint8_t*)0x20000009 = 0; |
| *(uint8_t*)0x2000000a = 0; |
| *(uint8_t*)0x2000000b = 0; |
| *(uint8_t*)0x2000000c = 0; |
| *(uint8_t*)0x2000000d = 0; |
| *(uint8_t*)0x2000000e = 0; |
| *(uint8_t*)0x2000000f = 0; |
| syscall(__NR_bind, r[0], 0x20000000, 0x10); |
| break; |
| case 3: |
| syscall(__NR_listen, r[0], 0); |
| break; |
| case 4: |
| *(uint8_t*)0x20000080 = 1; |
| *(uint8_t*)0x20000081 = 0x80; |
| *(uint8_t*)0x20000082 = 0xc2; |
| *(uint8_t*)0x20000083 = 0; |
| *(uint8_t*)0x20000084 = 0; |
| *(uint8_t*)0x20000085 = 0; |
| *(uint8_t*)0x20000086 = 0xaa; |
| *(uint8_t*)0x20000087 = 0xaa; |
| *(uint8_t*)0x20000088 = 0xaa; |
| *(uint8_t*)0x20000089 = 0xaa; |
| *(uint8_t*)0x2000008a = 0; |
| *(uint8_t*)0x2000008b = 0; |
| *(uint16_t*)0x2000008c = htobe16(0x814f); |
| break; |
| } |
| } |
| |
| void loop() |
| { |
| execute(5); |
| collide = 1; |
| execute(5); |
| } |
| |
| int main() |
| { |
| syscall(__NR_mmap, 0x20000000, 0x1000000, 3, 0x32, -1, 0); |
| loop(); |
| return 0; |
| } |