commit b1fcd35cf53553a0a3ef949b05106d921446abc3
author Daniel Borkmann <dborkman@redhat.com> Fri May 23 18:43:58 2014 +0200
committer David S. Miller <davem@davemloft.net> Fri May 23 16:48:05 2014 -0400
tree 4784eb248a9705f2eae7dcb10968497f0559499f
parent 8556ce79d5986a87fee4c29300b4efee07c0f15e

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>