| // INFO: task hung in jbd2_journal_commit_transaction |
| // https://syzkaller.appspot.com/bug?id=b8afb3d95297388287141f3721edb7a94b0280c5 |
| // status:dup |
| // autogenerated by syzkaller (https://github.com/google/syzkaller) |
| |
| #define _GNU_SOURCE |
| |
| #include <endian.h> |
| #include <pthread.h> |
| #include <stdint.h> |
| #include <stdio.h> |
| #include <stdlib.h> |
| #include <string.h> |
| #include <sys/syscall.h> |
| #include <sys/types.h> |
| #include <time.h> |
| #include <unistd.h> |
| |
| #include <linux/futex.h> |
| |
| static void sleep_ms(uint64_t ms) |
| { |
| usleep(ms * 1000); |
| } |
| |
| static uint64_t current_time_ms(void) |
| { |
| struct timespec ts; |
| if (clock_gettime(CLOCK_MONOTONIC, &ts)) |
| exit(1); |
| return (uint64_t)ts.tv_sec * 1000 + (uint64_t)ts.tv_nsec / 1000000; |
| } |
| |
| static void thread_start(void* (*fn)(void*), void* arg) |
| { |
| pthread_t th; |
| pthread_attr_t attr; |
| pthread_attr_init(&attr); |
| pthread_attr_setstacksize(&attr, 128 << 10); |
| if (pthread_create(&th, &attr, fn, arg)) |
| exit(1); |
| pthread_attr_destroy(&attr); |
| } |
| |
| typedef struct { |
| int state; |
| } event_t; |
| |
| static void event_init(event_t* ev) |
| { |
| ev->state = 0; |
| } |
| |
| static void event_reset(event_t* ev) |
| { |
| ev->state = 0; |
| } |
| |
| static void event_set(event_t* ev) |
| { |
| if (ev->state) |
| exit(1); |
| __atomic_store_n(&ev->state, 1, __ATOMIC_RELEASE); |
| syscall(SYS_futex, &ev->state, FUTEX_WAKE | FUTEX_PRIVATE_FLAG); |
| } |
| |
| static void event_wait(event_t* ev) |
| { |
| while (!__atomic_load_n(&ev->state, __ATOMIC_ACQUIRE)) |
| syscall(SYS_futex, &ev->state, FUTEX_WAIT | FUTEX_PRIVATE_FLAG, 0, 0); |
| } |
| |
| static int event_isset(event_t* ev) |
| { |
| return __atomic_load_n(&ev->state, __ATOMIC_ACQUIRE); |
| } |
| |
| static int event_timedwait(event_t* ev, uint64_t timeout) |
| { |
| uint64_t start = current_time_ms(); |
| uint64_t now = start; |
| for (;;) { |
| uint64_t remain = timeout - (now - start); |
| struct timespec ts; |
| ts.tv_sec = remain / 1000; |
| ts.tv_nsec = (remain % 1000) * 1000 * 1000; |
| syscall(SYS_futex, &ev->state, FUTEX_WAIT | FUTEX_PRIVATE_FLAG, 0, &ts); |
| if (__atomic_load_n(&ev->state, __ATOMIC_RELAXED)) |
| return 1; |
| now = current_time_ms(); |
| if (now - start > timeout) |
| return 0; |
| } |
| } |
| |
| struct thread_t { |
| int created, call; |
| event_t ready, done; |
| }; |
| |
| static struct thread_t threads[16]; |
| static void execute_call(int call); |
| static int running; |
| |
| static void* thr(void* arg) |
| { |
| struct thread_t* th = (struct thread_t*)arg; |
| for (;;) { |
| event_wait(&th->ready); |
| event_reset(&th->ready); |
| execute_call(th->call); |
| __atomic_fetch_sub(&running, 1, __ATOMIC_RELAXED); |
| event_set(&th->done); |
| } |
| return 0; |
| } |
| |
| static void loop(void) |
| { |
| int i, call, thread; |
| for (call = 0; call < 7; call++) { |
| for (thread = 0; thread < (int)(sizeof(threads) / sizeof(threads[0])); |
| thread++) { |
| struct thread_t* th = &threads[thread]; |
| if (!th->created) { |
| th->created = 1; |
| event_init(&th->ready); |
| event_init(&th->done); |
| event_set(&th->done); |
| thread_start(thr, th); |
| } |
| if (!event_isset(&th->done)) |
| continue; |
| event_reset(&th->done); |
| th->call = call; |
| __atomic_fetch_add(&running, 1, __ATOMIC_RELAXED); |
| event_set(&th->ready); |
| event_timedwait(&th->done, 45); |
| break; |
| } |
| } |
| for (i = 0; i < 100 && __atomic_load_n(&running, __ATOMIC_RELAXED); i++) |
| sleep_ms(1); |
| } |
| |
| uint64_t r[2] = {0xffffffffffffffff, 0xffffffffffffffff}; |
| |
| void execute_call(int call) |
| { |
| long res; |
| switch (call) { |
| case 0: |
| memcpy((void*)0x20000180, |
| "\x73\x74\x61\x74\x09\xc0\xc2\xfe\xbc\xf9\xdf\x2d\xea\xc8\xc1\x77" |
| "\xff\x17\x12\x48\xe9\x11\x93\x51\x30\x49\xf8\x31\x55\x0d\x6f\x7d" |
| "\xe6\x6c\xf6\x37\xbd\xbf\x13\x11\x92\x0c\x8a\x26\xed\xa4\xdc\xc3" |
| "\x78\x3f\x9d\xb5\x11\x6b\x34\xd3\x1b\x05\x12\xa5\x60\x8a\xaf\xf0" |
| "\x1e\x79\x52\x34\x0c\xd6\xfd\x00\x00\x00\x00", |
| 75); |
| res = syscall(__NR_openat, 0xffffff9c, 0x20000180, 0x275a, 0); |
| if (res != -1) |
| r[0] = res; |
| break; |
| case 1: |
| memcpy((void*)0x200005c0, "\xf7", 1); |
| syscall(__NR_pwrite64, r[0], 0x200005c0, 1, 0); |
| break; |
| case 2: |
| memcpy((void*)0x20000240, "memory.stat", 12); |
| res = syscall(__NR_openat, 0xffffff9c, 0x20000240, 0x275a, 0); |
| if (res != -1) |
| r[1] = res; |
| break; |
| case 3: |
| sprintf((char*)0x20000100, "0x%016llx", (long long)0); |
| syscall(__NR_write, r[1], 0x20000100, 0x12); |
| break; |
| case 4: |
| *(uint16_t*)0x20000080 = 0; |
| *(uint16_t*)0x20000082 = 0; |
| *(uint64_t*)0x20000088 = 0; |
| *(uint64_t*)0x20000090 = 0x405c92ec; |
| *(uint32_t*)0x20000098 = 0; |
| *(uint32_t*)0x2000009c = 0; |
| *(uint32_t*)0x200000a0 = 0; |
| *(uint32_t*)0x200000a4 = 0; |
| *(uint32_t*)0x200000a8 = 0; |
| *(uint32_t*)0x200000ac = 0; |
| syscall(__NR_ioctl, r[1], 0x40305828, 0x20000080); |
| break; |
| case 5: |
| *(uint16_t*)0x20000140 = 0; |
| *(uint16_t*)0x20000142 = 0; |
| *(uint64_t*)0x20000148 = 0x56cd4216; |
| *(uint64_t*)0x20000150 = 0x10001; |
| *(uint32_t*)0x20000158 = 0; |
| *(uint32_t*)0x2000015c = 0; |
| *(uint32_t*)0x20000160 = 0; |
| *(uint32_t*)0x20000164 = 0; |
| *(uint32_t*)0x20000168 = 0; |
| *(uint32_t*)0x2000016c = 0; |
| syscall(__NR_ioctl, r[0], 0x40305828, 0x20000140); |
| break; |
| case 6: |
| *(uint32_t*)0x20000300 = 0; |
| *(uint32_t*)0x20000304 = r[1]; |
| *(uint64_t*)0x20000308 = 0; |
| *(uint64_t*)0x20000310 = 0xfffa931c; |
| *(uint64_t*)0x20000318 = 0; |
| *(uint64_t*)0x20000320 = 0; |
| syscall(__NR_ioctl, r[0], 0xc028660f, 0x20000300); |
| break; |
| } |
| } |
| int main(void) |
| { |
| syscall(__NR_mmap, 0x20000000, 0x1000000, 3, 0x32, -1, 0); |
| loop(); |
| return 0; |
| } |