tree c13a7426c3cea62cd4a6f9e1ec8723269fe54a03
parent 9313baa13d9262e49d07b20ed57dceafcd7240cc
author Mikio Hara <mikioh.mikioh@gmail.com> 1472869235 +0900
committer Mikio Hara <mikioh.mikioh@gmail.com> 1473501447 +0000

icmp: don't step on recycled socket descriptors

This change fixes lazy socket descriptor handling in ListenPacket to
avoid treading on someone's socket descriptors which are recycled by
descriptor duplication. The issue happens when calling ListenPacket for
non-privileged ICMP endpoint concurrently.

Fixes golang/go#16969.

Change-Id: I4d7672535f5aeb2a0b71f8af2c7ba271a085f418
Reviewed-on: https://go-review.googlesource.com/28473
Run-TryBot: Mikio Hara <mikioh.mikioh@gmail.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Ian Lance Taylor <iant@golang.org>