// https://syzkaller.appspot.com/bug?id=3e99f9b4ca4807bb541159f3cd1c0776f6598ee8 // 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_procfs(uintptr_t a0, uintptr_t a1) { char buf[128]; memset(buf, 0, sizeof(buf)); if (a0 == 0) { snprintf(buf, sizeof(buf), "/proc/self/%s", (char*)a1); } else if (a0 == (uintptr_t)-1) { snprintf(buf, sizeof(buf), "/proc/thread-self/%s", (char*)a1); } else { snprintf(buf, sizeof(buf), "/proc/self/task/%d/%s", (int)a0, (char*)a1); } int fd = open(buf, O_RDWR); if (fd == -1) fd = open(buf, O_RDONLY); return fd; } static void execute_one(); extern unsigned long long procid; void loop() { while (1) { execute_one(); } } uint64_t r[3] = {0xffffffffffffffff, 0xffffffffffffffff, 0xffffffffffffffff}; void execute_one() { long res = 0; res = syscall(__NR_socket, 0x26, 5, 0); if (res != -1) r[0] = res; memcpy((void*)0x20000280, "net/ip_tables_matches", 22); res = syz_open_procfs(0, 0x20000280); if (res != -1) r[1] = res; *(uint16_t*)0x20000000 = 0x26; memcpy((void*)0x20000002, "\x68\x61\x73\x68\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00", 14); *(uint32_t*)0x20000010 = 0; *(uint32_t*)0x20000014 = 0; memcpy((void*)0x20000018, "\x73\x68\x61\x33\x2d\x35\x31\x32\x2d\x67\x65\x6e\x65\x72\x69\x63\x00" "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00" "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00" "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00", 64); syscall(__NR_bind, r[0], 0x20000000, 0x58); res = syscall(__NR_accept4, r[0], 0, 0, 0); if (res != -1) r[2] = res; *(uint64_t*)0x208ef000 = 0; syscall(__NR_sendfile, r[2], r[1], 0x208ef000, 0xd0); } int main() { syscall(__NR_mmap, 0x20000000, 0x1000000, 3, 0x32, -1, 0); for (;;) { loop(); } }