[PATCH net v4 0/3] net/smc: fix out-of-bounds and use-after-free in SMC-Rv2 LLC processing

Split of the single v3 patch, in the order Jakub asked for:

  1/3 frees the LLC queue entry in smc_llc_srv_add_link() only after the
      last use of the pointer into it.
  2/3 bounds the peer-declared rkey counts in smc_llc_save_add_link_rkeys()
      and smc_llc_rmt_delete_rkey() by the buffer they read from.
  3/3 copies an oversized SMC-Rv2 LLC message into the queue entry and
      declares the rkeys that fit inline, so both consumers stop
      reconstructing the layout themselves.

1/3 and 2/3 are tagged for stable.  3/3 is not: it does not fix a crash on
its own, and it changes a structure layout and a static function signature.


---
v3: https://lore.kernel.org/all/[email protected]/

Yehyeong Lee (3):
  net/smc: fix use-after-free of the LLC qentry in
    smc_llc_srv_add_link()
  net/smc: bound the peer rkey counts in SMC-Rv2 LLC messages
  net/smc: carry oversized SMC-Rv2 LLC messages in the queue entry

 net/smc/smc_llc.c | 101 ++++++++++++++++++++++++++++++++++------------
 1 file changed, 76 insertions(+), 25 deletions(-)

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2.43.0