| // possible deadlock in perf_trace_destroy (2) |
| // https://syzkaller.appspot.com/bug?id=558630d9f2a0eea2faa91162e00de23d0d21d449 |
| // 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> |
| |
| #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; \ |
| } |
| |
| 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; |
| } |
| } |
| } |
| } |
| |
| long r[2]; |
| void execute_call(int call) |
| { |
| switch (call) { |
| case 0: |
| syscall(__NR_mmap, 0x20000000, 0xfff000, 3, 0x32, -1, 0); |
| break; |
| case 1: |
| *(uint32_t*)0x20bab000 = 1; |
| *(uint32_t*)0x20bab004 = 0x78; |
| *(uint8_t*)0x20bab008 = 0; |
| *(uint8_t*)0x20bab009 = 0; |
| *(uint8_t*)0x20bab00a = 0; |
| *(uint8_t*)0x20bab00b = 0; |
| *(uint32_t*)0x20bab00c = 0; |
| *(uint64_t*)0x20bab010 = 0; |
| *(uint64_t*)0x20bab018 = 0; |
| *(uint64_t*)0x20bab020 = 0; |
| STORE_BY_BITMASK(uint64_t, 0x20bab028, 0, 0, 1); |
| STORE_BY_BITMASK(uint64_t, 0x20bab028, 0, 1, 1); |
| STORE_BY_BITMASK(uint64_t, 0x20bab028, 0, 2, 1); |
| STORE_BY_BITMASK(uint64_t, 0x20bab028, 0, 3, 1); |
| STORE_BY_BITMASK(uint64_t, 0x20bab028, 0, 4, 1); |
| STORE_BY_BITMASK(uint64_t, 0x20bab028, 0, 5, 1); |
| STORE_BY_BITMASK(uint64_t, 0x20bab028, 0, 6, 1); |
| STORE_BY_BITMASK(uint64_t, 0x20bab028, 0, 7, 1); |
| STORE_BY_BITMASK(uint64_t, 0x20bab028, 0, 8, 1); |
| STORE_BY_BITMASK(uint64_t, 0x20bab028, 1, 9, 1); |
| STORE_BY_BITMASK(uint64_t, 0x20bab028, 0, 10, 1); |
| STORE_BY_BITMASK(uint64_t, 0x20bab028, 0, 11, 1); |
| STORE_BY_BITMASK(uint64_t, 0x20bab028, 0, 12, 1); |
| STORE_BY_BITMASK(uint64_t, 0x20bab028, 0, 13, 1); |
| STORE_BY_BITMASK(uint64_t, 0x20bab028, 0, 14, 1); |
| STORE_BY_BITMASK(uint64_t, 0x20bab028, 0, 15, 2); |
| STORE_BY_BITMASK(uint64_t, 0x20bab028, 0, 17, 1); |
| STORE_BY_BITMASK(uint64_t, 0x20bab028, 0, 18, 1); |
| STORE_BY_BITMASK(uint64_t, 0x20bab028, 0, 19, 1); |
| STORE_BY_BITMASK(uint64_t, 0x20bab028, 0, 20, 1); |
| STORE_BY_BITMASK(uint64_t, 0x20bab028, 0, 21, 1); |
| STORE_BY_BITMASK(uint64_t, 0x20bab028, 0, 22, 1); |
| STORE_BY_BITMASK(uint64_t, 0x20bab028, 0, 23, 1); |
| STORE_BY_BITMASK(uint64_t, 0x20bab028, 0, 24, 1); |
| STORE_BY_BITMASK(uint64_t, 0x20bab028, 0, 25, 1); |
| STORE_BY_BITMASK(uint64_t, 0x20bab028, 0, 26, 1); |
| STORE_BY_BITMASK(uint64_t, 0x20bab028, 0, 27, 1); |
| STORE_BY_BITMASK(uint64_t, 0x20bab028, 0, 28, 1); |
| STORE_BY_BITMASK(uint64_t, 0x20bab028, 0, 29, 35); |
| *(uint32_t*)0x20bab030 = 0; |
| *(uint32_t*)0x20bab034 = 0; |
| *(uint64_t*)0x20bab038 = 0; |
| *(uint64_t*)0x20bab040 = 0; |
| *(uint64_t*)0x20bab048 = 0; |
| *(uint64_t*)0x20bab050 = 0; |
| *(uint64_t*)0x20bab058 = 0; |
| *(uint32_t*)0x20bab060 = 0; |
| *(uint64_t*)0x20bab068 = 0; |
| *(uint32_t*)0x20bab070 = 0; |
| *(uint16_t*)0x20bab074 = 0; |
| *(uint16_t*)0x20bab076 = 0; |
| r[0] = syscall(__NR_perf_event_open, 0x20bab000, -1, 0, -1, 0); |
| break; |
| case 2: |
| syscall(__NR_ioctl, r[0], 0x2403, 0x43017aa); |
| break; |
| case 3: |
| r[1] = syscall(__NR_getpid); |
| break; |
| case 4: |
| *(uint32_t*)0x2025c000 = 2; |
| *(uint32_t*)0x2025c004 = 0x78; |
| *(uint8_t*)0x2025c008 = 0xe3; |
| *(uint8_t*)0x2025c009 = 0; |
| *(uint8_t*)0x2025c00a = 0; |
| *(uint8_t*)0x2025c00b = 0; |
| *(uint32_t*)0x2025c00c = 0; |
| *(uint64_t*)0x2025c010 = 0; |
| *(uint64_t*)0x2025c018 = 0; |
| *(uint64_t*)0x2025c020 = 0; |
| STORE_BY_BITMASK(uint64_t, 0x2025c028, 0, 0, 1); |
| STORE_BY_BITMASK(uint64_t, 0x2025c028, 3, 1, 1); |
| STORE_BY_BITMASK(uint64_t, 0x2025c028, 0, 2, 1); |
| STORE_BY_BITMASK(uint64_t, 0x2025c028, 0, 3, 1); |
| STORE_BY_BITMASK(uint64_t, 0x2025c028, 0, 4, 1); |
| STORE_BY_BITMASK(uint64_t, 0x2025c028, 0, 5, 1); |
| STORE_BY_BITMASK(uint64_t, 0x2025c028, 4, 6, 1); |
| STORE_BY_BITMASK(uint64_t, 0x2025c028, 0, 7, 1); |
| STORE_BY_BITMASK(uint64_t, 0x2025c028, 0, 8, 1); |
| STORE_BY_BITMASK(uint64_t, 0x2025c028, 0, 9, 1); |
| STORE_BY_BITMASK(uint64_t, 0x2025c028, 0, 10, 1); |
| STORE_BY_BITMASK(uint64_t, 0x2025c028, 0xfffffffffffffffc, 11, 1); |
| STORE_BY_BITMASK(uint64_t, 0x2025c028, 0, 12, 1); |
| STORE_BY_BITMASK(uint64_t, 0x2025c028, 0, 13, 1); |
| STORE_BY_BITMASK(uint64_t, 0x2025c028, 0, 14, 1); |
| STORE_BY_BITMASK(uint64_t, 0x2025c028, -1, 15, 2); |
| STORE_BY_BITMASK(uint64_t, 0x2025c028, 0, 17, 1); |
| STORE_BY_BITMASK(uint64_t, 0x2025c028, 0, 18, 1); |
| STORE_BY_BITMASK(uint64_t, 0x2025c028, -1, 19, 1); |
| STORE_BY_BITMASK(uint64_t, 0x2025c028, 0, 20, 1); |
| STORE_BY_BITMASK(uint64_t, 0x2025c028, 0, 21, 1); |
| STORE_BY_BITMASK(uint64_t, 0x2025c028, 8, 22, 1); |
| STORE_BY_BITMASK(uint64_t, 0x2025c028, 0, 23, 1); |
| STORE_BY_BITMASK(uint64_t, 0x2025c028, 0, 24, 1); |
| STORE_BY_BITMASK(uint64_t, 0x2025c028, 0, 25, 1); |
| STORE_BY_BITMASK(uint64_t, 0x2025c028, 0, 26, 1); |
| STORE_BY_BITMASK(uint64_t, 0x2025c028, 0, 27, 1); |
| STORE_BY_BITMASK(uint64_t, 0x2025c028, 0, 28, 1); |
| STORE_BY_BITMASK(uint64_t, 0x2025c028, 0, 29, 35); |
| *(uint32_t*)0x2025c030 = 0; |
| *(uint32_t*)0x2025c034 = 0; |
| *(uint64_t*)0x2025c038 = 0x20000000; |
| *(uint64_t*)0x2025c040 = 0; |
| *(uint64_t*)0x2025c048 = 0; |
| *(uint64_t*)0x2025c050 = 0; |
| *(uint64_t*)0x2025c058 = 0; |
| *(uint32_t*)0x2025c060 = 0; |
| *(uint64_t*)0x2025c068 = 0; |
| *(uint32_t*)0x2025c070 = 0; |
| *(uint16_t*)0x2025c074 = 0; |
| *(uint16_t*)0x2025c076 = 0; |
| syscall(__NR_perf_event_open, 0x2025c000, r[1], 0, -1, 0); |
| break; |
| } |
| } |
| |
| void loop() |
| { |
| memset(r, -1, sizeof(r)); |
| execute(5); |
| collide = 1; |
| execute(5); |
| } |
| |
| int main() |
| { |
| loop(); |
| return 0; |
| } |