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| author | Daniel Borkmann <dborkman@redhat.com> | 2014-05-23 18:43:58 +0200 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2014-05-23 16:48:05 -0400 |
| commit | b1fcd35cf53553a0a3ef949b05106d921446abc3 (patch) | |
| tree | 4784eb248a9705f2eae7dcb10968497f0559499f /net/sched/cls_bpf.c | |
| parent | 8556ce79d5986a87fee4c29300b4efee07c0f15e (diff) | |
| download | linux-b1fcd35cf53553a0a3ef949b05106d921446abc3.tar.bz2 | |
net: filter: let unattached filters use sock_fprog_kern
The sk_unattached_filter_create() API is used by BPF filters that
are not directly attached or related to sockets, and are used in
team, ptp, xt_bpf, cls_bpf, etc. As such all users do their own
internal managment of obtaining filter blocks and thus already
have them in kernel memory and set up before calling into
sk_unattached_filter_create(). As a result, due to __user annotation
in sock_fprog, sparse triggers false positives (incorrect type in
assignment [different address space]) when filters are set up before
passing them to sk_unattached_filter_create(). Therefore, let
sk_unattached_filter_create() API use sock_fprog_kern to overcome
this issue.
Signed-off-by: Daniel Borkmann <dborkman@redhat.com>
Acked-by: Alexei Starovoitov <ast@plumgrid.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/sched/cls_bpf.c')
| -rw-r--r-- | net/sched/cls_bpf.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/net/sched/cls_bpf.c b/net/sched/cls_bpf.c index 16186965af97..13f64df2c710 100644 --- a/net/sched/cls_bpf.c +++ b/net/sched/cls_bpf.c @@ -160,7 +160,7 @@ static int cls_bpf_modify_existing(struct net *net, struct tcf_proto *tp, { struct sock_filter *bpf_ops, *bpf_old; struct tcf_exts exts; - struct sock_fprog tmp; + struct sock_fprog_kern tmp; struct sk_filter *fp, *fp_old; u16 bpf_size, bpf_len; u32 classid; @@ -191,7 +191,7 @@ static int cls_bpf_modify_existing(struct net *net, struct tcf_proto *tp, memcpy(bpf_ops, nla_data(tb[TCA_BPF_OPS]), bpf_size); tmp.len = bpf_len; - tmp.filter = (struct sock_filter __user *) bpf_ops; + tmp.filter = bpf_ops; ret = sk_unattached_filter_create(&fp, &tmp); if (ret) |