// 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_mmap #define __NR_mmap 192 #endif #ifndef __NR_ioctl #define __NR_ioctl 54 #endif #ifndef __NR_readv #define __NR_readv 145 #endif #undef __NR_mmap #define __NR_mmap __NR_mmap2 long r[1]; void loop() { memset(r, -1, sizeof(r)); syscall(__NR_mmap, 0x20000000, 0xfbe000, 3, 0x32, -1, 0); memcpy((void*)0x20247ff7, "/dev/sg#", 9); r[0] = syz_open_dev(0x20247ff7, 0, 0); *(uint64_t*)0x20fb8000 = 1; syscall(__NR_ioctl, r[0], 0x5452, 0x20fb8000); *(uint32_t*)0x20fb8fd8 = 0x20628f87; *(uint32_t*)0x20fb8fdc = 0x79; *(uint32_t*)0x20fb8fe0 = 0x20fb8000; *(uint32_t*)0x20fb8fe4 = 0x32; *(uint32_t*)0x20fb8fe8 = 0x20af7000; *(uint32_t*)0x20fb8fec = 0xa2; *(uint32_t*)0x20fb8ff0 = 0x20fb8fba; *(uint32_t*)0x20fb8ff4 = 0x46; *(uint32_t*)0x20fb8ff8 = 0x20fb8ff4; *(uint32_t*)0x20fb8ffc = 0xc; syscall(__NR_readv, r[0], 0x20fb8fd8, 5); } int main() { loop(); return 0; }