// https://syzkaller.appspot.com/bug?id=317e43b35f26b72133dabf369165249d1f78c584 // 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[1] = {0xffffffffffffffff}; int main(void) { syscall(__NR_mmap, 0x1ffff000ul, 0x1000ul, 0ul, 0x32ul, -1, 0ul); syscall(__NR_mmap, 0x20000000ul, 0x1000000ul, 7ul, 0x32ul, -1, 0ul); syscall(__NR_mmap, 0x21000000ul, 0x1000ul, 0ul, 0x32ul, -1, 0ul); intptr_t res = 0; memcpy((void*)0x20000100, "/dev/dri/card#\000", 15); res = -1; res = syz_open_dev(0x20000100, 1, 0); if (res != -1) r[0] = res; *(uint32_t*)0x20000580 = 0; *(uint32_t*)0x20000584 = 0xc4; *(uint32_t*)0x20000588 = 0x7f; *(uint32_t*)0x2000058c = 0xa0203843; *(uint32_t*)0x20000590 = 0; *(uint32_t*)0x20000594 = 2; *(uint32_t*)0x20000598 = 0; *(uint32_t*)0x2000059c = 0; *(uint32_t*)0x200005a0 = 0; *(uint32_t*)0x200005a4 = 0xc4000000; *(uint32_t*)0x200005a8 = 0; *(uint32_t*)0x200005ac = 0; *(uint32_t*)0x200005b0 = 0; *(uint32_t*)0x200005b4 = 0; *(uint32_t*)0x200005b8 = 0; *(uint32_t*)0x200005bc = 0; *(uint32_t*)0x200005c0 = 0; *(uint64_t*)0x200005c8 = 0; *(uint64_t*)0x200005d0 = 0; *(uint64_t*)0x200005d8 = 0; *(uint64_t*)0x200005e0 = 0x200; syscall(__NR_ioctl, r[0], 0xc06864b8, 0x20000580ul); return 0; }