// https://syzkaller.appspot.com/bug?id=3c1f47967b7cbd399d3ba3e65f297a29aa1c5f92 // autogenerated by syzkaller (http://github.com/google/syzkaller) #define _GNU_SOURCE #include #include #include #include #include #include #include #include #include static uintptr_t syz_open_dev(uintptr_t a0, uintptr_t a1, uintptr_t 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)); 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}; void loop() { long res; memcpy((void*)0x20265ff7, "/dev/sg#", 9); res = syz_open_dev(0x20265ff7, 0, 2); if (res != -1) r[0] = res; *(uint32_t*)0x2012f000 = 0x50; *(uint32_t*)0x2012f004 = 0; *(uint64_t*)0x2012f008 = 0; *(uint32_t*)0x2012f010 = 7; *(uint32_t*)0x2012f014 = 0x1a; *(uint32_t*)0x2012f018 = 0; *(uint32_t*)0x2012f01c = 0; *(uint16_t*)0x2012f020 = 0; *(uint16_t*)0x2012f022 = 0; *(uint32_t*)0x2012f024 = 0; *(uint32_t*)0x2012f028 = 0; *(uint32_t*)0x2012f02c = 0; *(uint32_t*)0x2012f030 = 0; *(uint32_t*)0x2012f034 = 0; *(uint32_t*)0x2012f038 = 0; *(uint32_t*)0x2012f03c = 0; *(uint32_t*)0x2012f040 = 0; *(uint32_t*)0x2012f044 = 0; *(uint32_t*)0x2012f048 = 0; *(uint32_t*)0x2012f04c = 0; syscall(__NR_write, r[0], 0x2012f000, 0x50); syscall(__NR_read, r[0], 0x205c5fc7, 0x23); } int main() { syscall(__NR_mmap, 0x20000000, 0x1000000, 3, 0x32, -1, 0); loop(); return 0; }