diff options
Diffstat (limited to 'test/35fa71a030ca-test.c')
-rw-r--r-- | test/35fa71a030ca-test.c | 318 |
1 files changed, 318 insertions, 0 deletions
diff --git a/test/35fa71a030ca-test.c b/test/35fa71a030ca-test.c new file mode 100644 index 0000000..17e062b --- /dev/null +++ b/test/35fa71a030ca-test.c @@ -0,0 +1,318 @@ +// autogenerated by syzkaller (https://github.com/google/syzkaller) + +#include <dirent.h> +#include <endian.h> +#include <errno.h> +#include <fcntl.h> +#include <pthread.h> +#include <signal.h> +#include <stdarg.h> +#include <stdbool.h> +#include <stdint.h> +#include <stdio.h> +#include <stdlib.h> +#include <string.h> +#include <sys/prctl.h> +#include <sys/stat.h> +#include <sys/syscall.h> +#include <sys/types.h> +#include <sys/wait.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); + int i; + for (i = 0; i < 100; i++) { + if (pthread_create(&th, &attr, fn, arg) == 0) { + pthread_attr_destroy(&attr); + return; + } + if (errno == EAGAIN) { + usleep(50); + continue; + } + break; + } + exit(1); +} + +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; + } +} + +static bool write_file(const char* file, const char* what, ...) +{ + char buf[1024]; + va_list args; + va_start(args, what); + vsnprintf(buf, sizeof(buf), what, args); + va_end(args); + buf[sizeof(buf) - 1] = 0; + int len = strlen(buf); + int fd = open(file, O_WRONLY | O_CLOEXEC); + if (fd == -1) + return false; + if (write(fd, buf, len) != len) { + int err = errno; + close(fd); + errno = err; + return false; + } + close(fd); + return true; +} + +static void kill_and_wait(int pid, int* status) +{ + kill(-pid, SIGKILL); + kill(pid, SIGKILL); + int i; + for (i = 0; i < 100; i++) { + if (waitpid(-1, status, WNOHANG | __WALL) == pid) + return; + usleep(1000); + } + DIR* dir = opendir("/sys/fs/fuse/connections"); + if (dir) { + for (;;) { + struct dirent* ent = readdir(dir); + if (!ent) + break; + if (strcmp(ent->d_name, ".") == 0 || strcmp(ent->d_name, "..") == 0) + continue; + char abort[300]; + snprintf(abort, sizeof(abort), "/sys/fs/fuse/connections/%s/abort", + ent->d_name); + int fd = open(abort, O_WRONLY); + if (fd == -1) { + continue; + } + if (write(fd, abort, 1) < 0) { + } + close(fd); + } + closedir(dir); + } else { + } + while (waitpid(-1, status, __WALL) != pid) { + } +} + +#define SYZ_HAVE_SETUP_TEST 1 +static void setup_test() +{ + prctl(PR_SET_PDEATHSIG, SIGKILL, 0, 0, 0); + setpgrp(); + write_file("/proc/self/oom_score_adj", "1000"); +} + +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 execute_one(void) +{ + int i, call, thread; + for (call = 0; call < 3; 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); +} + +static void execute_one(void); + +#define WAIT_FLAGS __WALL + +static void loop(void) +{ + int iter; + for (iter = 0;; iter++) { + int pid = fork(); + if (pid < 0) + exit(1); + if (pid == 0) { + setup_test(); + execute_one(); + exit(0); + } + int status = 0; + uint64_t start = current_time_ms(); + for (;;) { + if (waitpid(-1, &status, WNOHANG | WAIT_FLAGS) == pid) + break; + sleep_ms(1); + if (current_time_ms() - start < 5 * 1000) + continue; + kill_and_wait(pid, &status); + break; + } + } +} + +#ifndef __NR_io_uring_register +#define __NR_io_uring_register 427 +#endif +#ifndef __NR_io_uring_setup +#define __NR_io_uring_setup 425 +#endif +#ifndef __NR_mmap +#define __NR_mmap 192 +#endif + +uint64_t r[1] = {0xffffffffffffffff}; + +void execute_call(int call) +{ + long res; + switch (call) { + case 0: + *(uint32_t*)0x20000040 = 0; + *(uint32_t*)0x20000044 = 0; + *(uint32_t*)0x20000048 = 0; + *(uint32_t*)0x2000004c = 0; + *(uint32_t*)0x20000050 = 0; + *(uint32_t*)0x20000054 = 0; + *(uint32_t*)0x20000058 = 0; + *(uint32_t*)0x2000005c = 0; + *(uint32_t*)0x20000060 = 0; + *(uint32_t*)0x20000064 = 0; + *(uint32_t*)0x20000068 = 0; + *(uint32_t*)0x2000006c = 0; + *(uint32_t*)0x20000070 = 0; + *(uint32_t*)0x20000074 = 0; + *(uint32_t*)0x20000078 = 0; + *(uint32_t*)0x2000007c = 0; + *(uint32_t*)0x20000080 = 0; + *(uint32_t*)0x20000084 = 0; + *(uint64_t*)0x20000088 = 0; + *(uint32_t*)0x20000090 = 0; + *(uint32_t*)0x20000094 = 0; + *(uint32_t*)0x20000098 = 0; + *(uint32_t*)0x2000009c = 0; + *(uint32_t*)0x200000a0 = 0; + *(uint32_t*)0x200000a4 = 0; + *(uint32_t*)0x200000a8 = 0; + *(uint32_t*)0x200000ac = 0; + *(uint64_t*)0x200000b0 = 0; + res = syscall(__NR_io_uring_setup, 0x64, 0x20000040); + if (res != -1) + r[0] = res; + break; + case 1: + syscall(__NR_io_uring_register, (long)r[0], 0, 0, 0); + break; + case 2: + syscall(__NR_io_uring_register, (long)r[0], 0, 0, 0); + break; + } +} +int main(void) +{ + syscall(__NR_mmap, 0x20000000, 0x1000000, 3, 0x32, -1, 0); + loop(); + return 0; +} |