// https://syzkaller.appspot.com/bug?id=1379b6b21a2ffecd1ea4e2b564cc7e35d9f388b2 // 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_epoll_create #define __NR_epoll_create 254 #endif #ifndef __NR_epoll_ctl #define __NR_epoll_ctl 255 #endif #ifndef __NR_ioctl #define __NR_ioctl 54 #endif #undef __NR_mmap #define __NR_mmap __NR_mmap2 long r[2]; void loop() { memset(r, -1, sizeof(r)); syscall(__NR_mmap, 0x20000000, 0xfff000, 3, 0x32, -1, 0); memcpy((void*)0x20649000, "/dev/binder#", 13); r[0] = syz_open_dev(0x20649000, 0, 0); r[1] = syscall(__NR_epoll_create, 0x68c7); *(uint32_t*)0x20336ff4 = 0; *(uint64_t*)0x20336ff8 = 0; syscall(__NR_epoll_ctl, r[1], 1, r[0], 0x20336ff4); syscall(__NR_ioctl, r[0], 0x40046208, 0); } int main() { loop(); return 0; }