ipv6: invert flowlabel sharing check in process and user mode
authorWillem de Bruijn <willemb@google.com>
Thu, 25 Apr 2019 16:06:54 +0000 (12:06 -0400)
committerDavid S. Miller <davem@davemloft.net>
Mon, 29 Apr 2019 22:22:56 +0000 (18:22 -0400)
commit95c169251bf734aa555a1e8043e4d88ec97a04ec
tree9fb129a84de34397caabc0694dc1c2e6f953c7fc
parent6ee12b7b15e0b7890c196498d4207426cf47a2cb
ipv6: invert flowlabel sharing check in process and user mode

A request for a flowlabel fails in process or user exclusive mode must
fail if the caller pid or uid does not match. Invert the test.

Previously, the test was unsafe wrt PID recycling, but indeed tested
for inequality: fl1->owner != fl->owner

Fixes: 4f82f45730c68 ("net ip6 flowlabel: Make owner a union of struct pid* and kuid_t")
Signed-off-by: Willem de Bruijn <willemb@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
net/ipv6/ip6_flowlabel.c