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| author | Ivan Vecera <ivecera@redhat.com> | 2018-02-08 16:10:39 +0100 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2018-02-08 21:27:58 +0100 |
| commit | eb53f7af6f15285e2f6ada97285395343ce9f433 (patch) | |
| tree | a0d8288be4929ac39f3b115e1f159f8979b6b21e | |
| parent | mpls, nospec: Sanitize array index in mpls_label_ok() (diff) | |
| download | linux-eb53f7af6f15285e2f6ada97285395343ce9f433.tar.xz linux-eb53f7af6f15285e2f6ada97285395343ce9f433.zip | |
net/sched: cls_u32: fix cls_u32 on filter replace
The following sequence is currently broken:
# tc qdisc add dev foo ingress
# tc filter replace dev foo protocol all ingress \
u32 match u8 0 0 action mirred egress mirror dev bar1
# tc filter replace dev foo protocol all ingress \
handle 800::800 pref 49152 \
u32 match u8 0 0 action mirred egress mirror dev bar2
Error: cls_u32: Key node flags do not match passed flags.
We have an error talking to the kernel, -1
The error comes from u32_change() when comparing new and
existing flags. The existing ones always contains one of
TCA_CLS_FLAGS_{,NOT}_IN_HW flag depending on offloading state.
These flags cannot be passed from userspace so the condition
(n->flags != flags) in u32_change() always fails.
Fix the condition so the flags TCA_CLS_FLAGS_NOT_IN_HW and
TCA_CLS_FLAGS_IN_HW are not taken into account.
Fixes: 24d3dc6d27ea ("net/sched: cls_u32: Reflect HW offload status")
Signed-off-by: Ivan Vecera <ivecera@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
| -rw-r--r-- | net/sched/cls_u32.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/net/sched/cls_u32.c b/net/sched/cls_u32.c index 6311a548046b..c75e68e839c7 100644 --- a/net/sched/cls_u32.c +++ b/net/sched/cls_u32.c @@ -955,7 +955,8 @@ static int u32_change(struct net *net, struct sk_buff *in_skb, return -EINVAL; } - if (n->flags != flags) { + if ((n->flags ^ flags) & + ~(TCA_CLS_FLAGS_IN_HW | TCA_CLS_FLAGS_NOT_IN_HW)) { NL_SET_ERR_MSG_MOD(extack, "Key node flags do not match passed flags"); return -EINVAL; } |