// https://syzkaller.appspot.com/bug?id=ea8291a5b20aa48941a0cacabe6688024b237728 // 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); } } #ifndef __NR_ioctl #define __NR_ioctl 54 #endif #ifndef __NR_readv #define __NR_readv 145 #endif #ifndef __NR_mmap #define __NR_mmap 192 #endif #undef __NR_mmap #define __NR_mmap __NR_mmap2 long r[1]; void loop() { memset(r, -1, sizeof(r)); syscall(__NR_mmap, 0x20000000, 0xfff000, 3, 0x32, -1, 0); memcpy((void*)0x2047cff7, "/dev/sg#", 9); r[0] = syz_open_dev(0x2047cff7, 0, 0); *(uint64_t*)0x202c4ff8 = 6; syscall(__NR_ioctl, r[0], 0x5452, 0x202c4ff8); *(uint32_t*)0x20ce3f70 = 0x20bef000; *(uint32_t*)0x20ce3f74 = 0xab; *(uint32_t*)0x20ce3f78 = 0x202d1000; *(uint32_t*)0x20ce3f7c = 0xdc; *(uint32_t*)0x20ce3f80 = 0x20c54f7f; *(uint32_t*)0x20ce3f84 = 0x81; *(uint32_t*)0x20ce3f88 = 0x2064e000; *(uint32_t*)0x20ce3f8c = 0x5f; *(uint32_t*)0x20ce3f90 = 0x20d49ffd; *(uint32_t*)0x20ce3f94 = 3; *(uint32_t*)0x20ce3f98 = 0x207d3f92; *(uint32_t*)0x20ce3f9c = 0x6e; *(uint32_t*)0x20ce3fa0 = 0x2011df29; *(uint32_t*)0x20ce3fa4 = 0xd7; *(uint32_t*)0x20ce3fa8 = 0x204a5000; *(uint32_t*)0x20ce3fac = 0xc5; *(uint32_t*)0x20ce3fb0 = 0x204fe000; *(uint32_t*)0x20ce3fb4 = 0x98; syscall(__NR_readv, r[0], 0x20ce3f70, 9); } int main() { loop(); return 0; }