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authorEric Dumazet <edumazet@google.com>2017-03-03 14:08:21 -0800
committerDavid S. Miller <davem@davemloft.net>2017-03-07 13:58:33 -0800
commit02b2faaf0af1d85585f6d6980e286d53612acfc2 (patch)
tree1d5684fc4dd1f82e2fa7883e8f291674a2d3d8b7 /Kconfig
parentb73d2da8c724bb26885512e1ba47b91e2a9f48c3 (diff)
downloadlinux-02b2faaf0af1d85585f6d6980e286d53612acfc2.tar.bz2
tcp: fix various issues for sockets morphing to listen state
Dmitry Vyukov reported a divide by 0 triggered by syzkaller, exploiting tcp_disconnect() path that was never really considered and/or used before syzkaller ;) I was not able to reproduce the bug, but it seems issues here are the three possible actions that assumed they would never trigger on a listener. 1) tcp_write_timer_handler 2) tcp_delack_timer_handler 3) MTU reduction Only IPv6 MTU reduction was properly testing TCP_CLOSE and TCP_LISTEN states from tcp_v6_mtu_reduced() Signed-off-by: Eric Dumazet <edumazet@google.com> Reported-by: Dmitry Vyukov <dvyukov@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'Kconfig')
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