CVE request Linux kernel: net: guard tcp_set_keepalive against crash

[P J P <ppandit () redhat com>]

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   Hello,

Linux kernel built with the Networking support(CONFIG_NET) is vulnerable to a
crash, while resetting a socket timer. It could occur while doing a
setsockopt(SO_KEEPALIVE) call.

A privileged user/process able to create RAW socket could use this flaw to
crash the system kernel resulting in DoS.

Upstream fix:
- -------------
  -> https://git.kernel.org/linus/3e10986d1d698140747fcfc2761ec9cb64c1d582

Reference:
- ----------
  -> https://bugzilla.redhat.com/show_bug.cgi?id=1141742


Thank you.
- --
Prasad J Pandit / Red Hat Product Security Team
47AF CE69 3A90 54AA 9045 1053 DD13 3D32 FE5B 041F

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