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| author | Paolo Abeni <pabeni@redhat.com> | 2020-05-29 17:49:18 +0200 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2020-05-30 21:54:03 -0700 |
| commit | 39884604b11692158ce0c559fc603510b96f8c2e (patch) | |
| tree | d802e6bb40168f200c990efbddaccafc538c725e /Documentation | |
| parent | b0c19ed6088ab41dd2a727b60594b7297c15d6ce (diff) | |
| download | lwn-39884604b11692158ce0c559fc603510b96f8c2e.tar.gz lwn-39884604b11692158ce0c559fc603510b96f8c2e.zip | |
mptcp: fix NULL ptr dereference in MP_JOIN error path
When token lookup on MP_JOIN 3rd ack fails, the server
socket closes with a reset the incoming child. Such socket
has the 'is_mptcp' flag set, but no msk socket associated
- due to the failed lookup.
While crafting the reset packet mptcp_established_options_mp()
will try to dereference the child's master socket, causing
a NULL ptr dereference.
This change addresses the issue with explicit fallback to
TCP in such error path.
Fixes: 729cd6436f35 ("mptcp: cope better with MP_JOIN failure")
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'Documentation')
0 files changed, 0 insertions, 0 deletions