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| author | Phil Sutter <phil@nwl.cc> | 2017-12-19 15:17:13 +0100 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2017-12-19 14:21:58 -0500 |
| commit | d03a45572efa068fa64db211d6d45222660e76c5 (patch) | |
| tree | eaa1ffaece732cdebe08a879d8f86f5d34d136b3 /drivers | |
| parent | a1762456993893795030d911106a7650481db0ef (diff) | |
| download | linux-d03a45572efa068fa64db211d6d45222660e76c5.tar.bz2 | |
ipv4: fib: Fix metrics match when deleting a route
The recently added fib_metrics_match() causes a regression for routes
with both RTAX_FEATURES and RTAX_CC_ALGO if the latter has
TCP_CONG_NEEDS_ECN flag set:
| # ip link add d0 type dummy
| # ip link set d0 up
| # ip route add 172.29.29.0/24 dev d0 features ecn congctl dctcp
| # ip route del 172.29.29.0/24 dev d0 features ecn congctl dctcp
| RTNETLINK answers: No such process
During route insertion, fib_convert_metrics() detects that the given CC
algo requires ECN and hence sets DST_FEATURE_ECN_CA bit in
RTAX_FEATURES.
During route deletion though, fib_metrics_match() compares stored
RTAX_FEATURES value with that from userspace (which obviously has no
knowledge about DST_FEATURE_ECN_CA) and fails.
Fixes: 5f9ae3d9e7e4a ("ipv4: do metrics match when looking up and deleting a route")
Signed-off-by: Phil Sutter <phil@nwl.cc>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers')
0 files changed, 0 insertions, 0 deletions