// https://syzkaller.appspot.com/bug?id=a25c528dc46f648049a9a80b5e4c4a328cbeecf1 // autogenerated by syzkaller (https://github.com/google/syzkaller) #define _GNU_SOURCE #include #include #include #include #include #include #include #include #include #include #ifndef __NR_ioctl #define __NR_ioctl 29 #endif #ifndef __NR_mmap #define __NR_mmap 222 #endif 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[6] = {0xffffffffffffffff, 0xffffffffffffffff, 0x0, 0x0, 0x0, 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*)0x20000000, "/dev/dri/card#\000", 15); res = -1; res = syz_open_dev(0x20000000, 0, 0); if (res != -1) r[0] = res; memcpy((void*)0x20000040, "/dev/dri/card#\000", 15); res = -1; res = syz_open_dev(0x20000040, 0xd21, 0); if (res != -1) r[1] = res; *(uint64_t*)0x200001c0 = 0; *(uint64_t*)0x200001c8 = 0x200000c0; *(uint64_t*)0x200001d0 = 0; *(uint64_t*)0x200001d8 = 0; *(uint32_t*)0x200001e0 = 0; *(uint32_t*)0x200001e4 = 1; *(uint32_t*)0x200001e8 = 0; *(uint32_t*)0x200001ec = 0; *(uint32_t*)0x200001f0 = 0; *(uint32_t*)0x200001f4 = 0; *(uint32_t*)0x200001f8 = 0; *(uint32_t*)0x200001fc = 0; res = syscall(__NR_ioctl, r[1], 0xc04064a0, 0x200001c0ul); if (res != -1) r[2] = *(uint32_t*)0x200000c0; *(uint64_t*)0x200003c0 = 0; *(uint32_t*)0x200003c8 = 0; *(uint32_t*)0x200003cc = r[2]; res = syscall(__NR_ioctl, r[1], 0xc06864a1, 0x200003c0ul); if (res != -1) r[3] = *(uint32_t*)0x200003d0; *(uint32_t*)0x20000440 = r[3]; *(uint32_t*)0x20000444 = 0; *(uint32_t*)0x20000448 = 0; *(uint32_t*)0x2000044c = 0; *(uint32_t*)0x20000450 = 0; *(uint32_t*)0x20000464 = 0; *(uint32_t*)0x20000468 = 0; *(uint32_t*)0x2000046c = 0; *(uint32_t*)0x20000470 = 0; *(uint32_t*)0x20000474 = 0; *(uint32_t*)0x20000478 = 0; *(uint32_t*)0x2000047c = 0; *(uint32_t*)0x20000480 = 0; *(uint64_t*)0x20000488 = 0; *(uint64_t*)0x20000490 = 0; *(uint64_t*)0x20000498 = 0; *(uint64_t*)0x200004a0 = 0; res = syscall(__NR_ioctl, r[1], 0xc06864ce, 0x20000440ul); if (res != -1) r[4] = *(uint32_t*)0x20000454; *(uint32_t*)0x20000140 = 0x401; *(uint32_t*)0x20000144 = 2; *(uint32_t*)0x20000148 = 0xb5; *(uint32_t*)0x2000014c = 0; syscall(__NR_ioctl, r[0], 0xc02064b2, 0x20000140ul); *(uint32_t*)0x20000080 = r[4]; *(uint32_t*)0x20000084 = 0; res = syscall(__NR_ioctl, r[0], 0xc00c642d, 0x20000080ul); if (res != -1) r[5] = *(uint32_t*)0x20000088; *(uint32_t*)0x20000184 = 0; *(uint32_t*)0x20000188 = r[5]; syscall(__NR_ioctl, r[1], 0xc00c642e, 0x20000180ul); return 0; }