netlink: add validation of NLA_F_NESTED flag

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Add new validation flag NL_VALIDATE_NESTED which adds three consistency
checks of NLA_F_NESTED_FLAG:

  - the flag is set on attributes with NLA_NESTED{,_ARRAY} policy
  - the flag is not set on attributes with other policies except NLA_UNSPEC
  - the flag is set on attribute passed to nla_parse_nested()

Signed-off-by: Michal Kubecek <mkubecek@suse.cz>

v2: change error messages to mention NLA_F_NESTED explicitly
Reviewed-by: Johannes Berg <johannes@sipsolutions.net>
Reviewed-by: David Ahern <dsahern@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

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Michal Kubecek 2019-05-02 16:15:10 +02:00 • committed by David S. Miller

parent d54a16b201

commit b424e432e7

2 changed files with 25 additions and 1 deletions

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11

include/net/netlink.h

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15

lib/nlattr.c

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