ipv4: backport upstream fixes
Bugzilla: https://bugzilla.redhat.com/show_bug.cgi?id=2104124 Upstream Status: linux.git
A few patches aren't actually bug fixes:
- patch 4 is a kernel selftest for the bug fixed in patch 3,
- patch 5 it a bug fix for patch 4's selftest,
- patch 6 is a prerequisite for patch 7 (to avoid conflicts).
Signed-off-by: Guillaume Nault gnault@redhat.com