tcp: debugging patch to warn if icsk_rto is 0

[ Testing fix for the patch series in b/308472523 / b/308151197
  Any code path that sets an RTO of 0 jiffies runs a risk of
  busy-looping for long periods, which would match the symptoms of the
  traces in b/308472523 ... ]

Google-Bug-Id: 308151197
Change-Id: I690c52efefe96fd2dba1fa22c08f588b46e97c79
Reviewed-on: https://cos-review.googlesource.com/c/third_party/kernel/+/61181
Reviewed-by: Brian Vazquez <brianvv@google.com>
Tested-by: Brian Vazquez <brianvv@google.com>
1 file changed