netdev - [PATCH net 0/3] Some sockopt optlen fixes

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Message-Id: <cover.1515436112.git.marcelo.leitner@gmail.com>
Date:   Mon,  8 Jan 2018 19:02:26 -0200
From:   Marcelo Ricardo Leitner <marcelo.leitner@...il.com>
To:     netdev@...r.kernel.org
Cc:     linux-sctp@...r.kernel.org, Neil Horman <nhorman@...driver.com>,
        Vlad Yasevich <vyasevich@...il.com>, haliu@...hat.com
Subject: [PATCH net 0/3] Some sockopt optlen fixes

Hangbin Liu reported that some SCTP sockopt are allowing the user to get
the kernel to allocate really large buffers by not having a ceiling on
optlen.

This patchset address this issue (in patch 2), replace an GFP_ATOMIC
that isn't needed and avoid calculating the option size multiple times
in some setsockopt.

Marcelo Ricardo Leitner (3):
  sctp: GFP_ATOMIC is not needed in sctp_setsockopt_events
  sctp: add a ceiling to optlen in some sockopts
  sctp: make use of pre-calculated len

 net/sctp/socket.c | 28 +++++++++++++++++++++-------
 1 file changed, 21 insertions(+), 7 deletions(-)

-- 
2.14.3