1. 02 4月, 2014 1 次提交
    • P
      netlink: don't compare the nul-termination in nla_strcmp · 8b7b9324
      Pablo Neira 提交于
      nla_strcmp compares the string length plus one, so it's implicitly
      including the nul-termination in the comparison.
      
       int nla_strcmp(const struct nlattr *nla, const char *str)
       {
              int len = strlen(str) + 1;
              ...
                      d = memcmp(nla_data(nla), str, len);
      
      However, if NLA_STRING is used, userspace can send us a string without
      the nul-termination. This is a problem since the string
      comparison will not match as the last byte may be not the
      nul-termination.
      
      Fix this by skipping the comparison of the nul-termination if the
      attribute data is nul-terminated. Suggested by Thomas Graf.
      
      Cc: Florian Westphal <fw@strlen.de>
      Cc: Thomas Graf <tgraf@suug.ch>
      Signed-off-by: NPablo Neira Ayuso <pablo@netfilter.org>
      Signed-off-by: NDavid S. Miller <davem@davemloft.net>
      8b7b9324
  2. 01 4月, 2014 39 次提交