Juliana Rodrigueiro <juliana.rodrigueiro@xxxxxxxxxxxxx> wrote: > When running a 64-bit kernel with a 32-bit iptables binary, the size of > the xt_nfacct_match_info struct diverges. > > kernel: sizeof(struct xt_nfacct_match_info) : 40 > iptables: sizeof(struct xt_nfacct_match_info)) : 36 > > Trying to append nfacct related rules results in an unhelpful message. > Although it is suggested to look for more information in dmesg, nothing > can be found there. > > # iptables -A <chain> -m nfacct --nfacct-name <acct-object> > iptables: Invalid argument. Run `dmesg' for more information. > > This patch fixes the memory misalignment by enforcing 8-byte alignment > within the struct. This solution is often used in many other uapi > netfilter headers. Yes, but this breaks the 32bit abi. Its best to add a 'v1' match revision to fix this.
