[PATCH libnftnl 0/7] misc LLM fixes

[Florian Westphal <fw@strlen.de>]

The only thing these changes have in common is that they are all
LLM findings.

1) Prevent out-of-bounds read in str_array.h, this doesn't cause crash, the
value that is read off the end of the array is not used.

2) Fix NFTNL_CHAIN_TYPE data_len to return the string length, consistent with
other attributes.

3) Fix fd leak in nftnl_batch_is_supported when mnl_socket_bind() fails.
Close the already-open socket on the error path.

4) Free partially-allocated sub-objects in nftnl_expr_parse error path via
nftnl_expr_free. Fixes memory leaks (e.g., dynset set_name) when parsing
embedded expressions fails after allocation.

5) Allow unsetting NFTNL_FLOWTABLE_SIZE.

6) Fix pointer state inconsistency by freeing the old value only after
strndup succeeds. Delegate nftnl_parse_str_attr to the fixed helper
instead of open-coding the same bug.

7) Add nftnl_mem_blob helper for user_data and switch all users to it,
resolving inconsistent state on alloc failure.

Florian Westphal (7):
  include: str_array.h: avoid oob read
  src: chain: fix NFTNL_CHAIN_TYPE data_len
  src: common: fix fd leak in nftnl_batch_is_supported
  expr: nftnl_expr_parse: use nftnl_expr_free on error unwind
  src: flowtable: allow to unset NFTNL_FLOWTABLE_SIZE
  src: utils: keep old name if strndup fails
  src: add and use nftnl_mem_blob for user_data

 include/obj.h       |  5 +----
 include/rule.h      |  5 +----
 include/set.h       |  5 +----
 include/set_elem.h  |  6 ++----
 include/str_array.h |  8 ++++----
 include/utils.h     | 24 ++++++++++++++++++++++++
 src/chain.c         | 25 ++++++++-----------------
 src/common.c        |  5 ++++-
 src/expr.c          |  2 +-
 src/flowtable.c     |  1 +
 src/object.c        | 18 ++++++------------
 src/rule.c          | 41 +++++++++++++----------------------------
 src/set.c           | 18 ++++++------------
 src/set_elem.c      | 31 +++++++++++--------------------
 src/table.c         | 23 +++++++----------------
 src/utils.c         | 43 ++++++++++++++++++++++++++++++++-----------
 16 files changed, 122 insertions(+), 138 deletions(-)
-- 
2.55.0