K 10
svn:author
V 8
gallatin
K 8
svn:date
V 27
2020-09-04T17:36:15.088559Z
K 7
svn:log
V 353
ktls: Check for a NULL send tag in ktls_cleanup()

When using ifnet ktls, and when ktls_reset_send_tag()
fails to allocate a replacement tag, it leaves
the tls session's snd_tag pointer NULL. ktls_cleanup()
tries to release the send tag, and will trip over
this NULL pointer and panic unless NULL is checked for.

Reviewed by:	jhb
Sponsored by:	Netflix

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