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| author |   Wei Wang <weiwan@google.com> | 2017-03-01 13:29:48 -0800 |
|---|---|---|
| committer |   David S. Miller <davem@davemloft.net> | 2017-03-02 14:05:41 -0800 |
| commit | 7db92362d2fee5887f6b0c41653b8c9f8f5d6020 (patch) | |
| tree | 4d1b45575d0b490061671c4dddaa32f795013e59 /tools/perf/scripts/python/stat-cpi.py | |
| parent | net: Introduce sk_clone_lock() error path routine (diff) | |
| download | wireguard-linux-7db92362d2fee5887f6b0c41653b8c9f8f5d6020.tar.xz wireguard-linux-7db92362d2fee5887f6b0c41653b8c9f8f5d6020.zip | |
tcp: fix potential double free issue for fastopen_req
tp->fastopen_req could potentially be double freed if a malicious
user does the following:
1. Enable TCP_FASTOPEN_CONNECT sockopt and do a connect() on the socket.
2. Call connect() with AF_UNSPEC to disconnect the socket.
3. Make this socket a listening socket by calling listen().
4. Accept incoming connections and generate child sockets. All child
sockets will get a copy of the pointer of fastopen_req.
5. Call close() on all sockets. fastopen_req will get freed multiple
times.
Fixes: 19f6d3f3c842 ("net/tcp-fastopen: Add new API support")
Reported-by: Andrey Konovalov <andreyknvl@google.com>
Signed-off-by: Wei Wang <weiwan@google.com>
Signed-off-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'tools/perf/scripts/python/stat-cpi.py')
0 files changed, 0 insertions, 0 deletions