// https://syzkaller.appspot.com/bug?id=88467c7ea8e87a8f258f2956ca019dcfe07de96d // autogenerated by syzkaller (https://github.com/google/syzkaller) #define _GNU_SOURCE #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include static void kill_and_wait(int pid, int* status) { kill(pid, SIGKILL); while (waitpid(-1, status, 0) != pid) { } } 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; } #define CAST static void execute_one(void); #define WAIT_FLAGS 0 static void loop(void) { int iter = 0; for (;; iter++) { int pid = fork(); if (pid < 0) exit(1); if (pid == 0) { 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 < 5000) continue; kill_and_wait(pid, &status); break; } } } uint64_t r[2] = {0xffffffffffffffff, 0xffffffffffffffff}; void execute_one(void) { intptr_t res = 0; memcpy((void*)0x200000c0, "./file0\000", 8); res = -1; res = ((intptr_t(*)(intptr_t,intptr_t,intptr_t))CAST(open))(/*file=*/0x200000c0, /*flags=O_SHLOCK|O_TRUNC|O_CREAT|O_WRONLY|0x4*/0x615, /*mode=*/0); if (res != -1) r[0] = res; ((intptr_t(*)(intptr_t,intptr_t))CAST(ftruncate))(/*fd=*/r[0], /*len=*/0x8001); memcpy((void*)0x200002c0, "/dev/rvnd0c\000", 12); res = -1; res = ((intptr_t(*)(intptr_t,intptr_t,intptr_t,intptr_t))CAST(openat))(/*fd=*/0xffffffffffffff9c, /*file=*/0x200002c0, /*flags=O_ASYNC*/0x40, /*mode=*/0); if (res != -1) r[1] = res; *(uint64_t*)0x20000380 = 0x20000300; memcpy((void*)0x20000300, "./file0\000", 8); *(uint64_t*)0x20000388 = 0x11e8bf51; *(uint64_t*)0x20000390 = 0x20000340; memcpy((void*)0x20000340, "./file1\000", 8); *(uint32_t*)0x20000398 = 8; ((intptr_t(*)(intptr_t,intptr_t,intptr_t))CAST(ioctl))(/*fd=*/r[1], /*cmd=*/0xc0384600, /*arg=*/0x20000380); } int main(void) { ((intptr_t(*)(intptr_t,intptr_t,intptr_t,intptr_t,intptr_t,intptr_t))CAST(mmap))(/*addr=*/0x20000000, /*len=*/0x1000000, /*prot=PROT_WRITE|PROT_READ*/3, /*flags=MAP_ANONYMOUS|MAP_FIXED|MAP_PRIVATE*/0x1012, /*fd=*/-1, /*offset=*/0); loop(); return 0; }