K 10
svn:author
V 3
cem
K 8
svn:date
V 27
2016-04-26T23:02:18.518316Z
K 7
svn:log
V 589
tcp_usrreq: Free allocated buffer in relock case

The disgusting macro INP_WLOCK_RECHECK may early-return.  In
tcp_default_ctloutput() the TCP_CCALGOOPT case allocates memory before invoking
this macro, which may leak memory.

Add a _CLEANUP variant that takes a code argument to perform variable cleanup
in the early return path.  Use it to free the 'pbuf' allocated in
tcp_default_ctloutput().

I am not especially happy with this macro, but I reckon it's not any worse than
INP_WLOCK_RECHECK already was.

Reported by:	Coverity
CID:		1350286
Sponsored by:	EMC / Isilon Storage Division

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