提交 · ede58ef28e105de94475b2b69fa069c9a2ce6933 · openeuler / raspberrypi-kernel

30 12月, 2014 1 次提交

genetlink: A genl_bind() to an out-of-range multicast group should not WARN(). · dc97a1a9

由 David S. Miller 提交于 12月 29, 2014

Users can request to bind to arbitrary multicast groups, so warning
when the requested group number is out of range is not appropriate.

And with the warning removed, and the 'err' variable properly given
an initial value, we can remove 'found' altogether.
Reported-by: NSedat Dilek <sedat.dilek@gmail.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

dc97a1a9

27 12月, 2014 2 次提交

netlink/genetlink: pass network namespace to bind/unbind · 023e2cfa

由 Johannes Berg 提交于 12月 23, 2014

Netlink families can exist in multiple namespaces, and for the most
part multicast subscriptions are per network namespace. Thus it only
makes sense to have bind/unbind notifications per network namespace.

To achieve this, pass the network namespace of a given client socket
to the bind/unbind functions.

Also do this in generic netlink, and there also make sure that any
bind for multicast groups that only exist in init_net is rejected.
This isn't really a problem if it is accepted since a client in a
different namespace will never receive any notifications from such
a group, but it can confuse the family if not rejected (it's also
possible to silently (without telling the family) accept it, but it
would also have to be ignored on unbind so families that take any
kind of action on bind/unbind won't do unnecessary work for invalid
clients like that.
Signed-off-by: NJohannes Berg <johannes.berg@intel.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

023e2cfa

genetlink: pass multicast bind/unbind to families · c380d9a7

由 Johannes Berg 提交于 12月 23, 2014

In order to make the newly fixed multicast bind/unbind
functionality in generic netlink, pass them down to the
appropriate family.
Signed-off-by: NJohannes Berg <johannes.berg@intel.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

c380d9a7

03 6月, 2014 1 次提交

genetlink: remove superfluous assignment · 2f91abd4

由 Denis ChengRq 提交于 6月 02, 2014

the local variable ops and n_ops were just read out from family,
and not changed, hence no need to assign back.

Validation functions should operate on const parameters and not
change anything.
Signed-off-by: NCheng Renquan <crquan@gmail.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

2f91abd4

25 4月, 2014 1 次提交

net: Use netlink_ns_capable to verify the permisions of netlink messages · 90f62cf3

由 Eric W. Biederman 提交于 4月 23, 2014

It is possible by passing a netlink socket to a more privileged
executable and then to fool that executable into writing to the socket
data that happens to be valid netlink message to do something that
privileged executable did not intend to do.

To keep this from happening replace bare capable and ns_capable calls
with netlink_capable, netlink_net_calls and netlink_ns_capable calls.
Which act the same as the previous calls except they verify that the
opener of the socket had the desired permissions as well.
Reported-by: NAndy Lutomirski <luto@amacapital.net>
Signed-off-by: N"Eric W. Biederman" <ebiederm@xmission.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

90f62cf3

07 1月, 2014 1 次提交

genl: Add genlmsg_new_unicast() for unicast message allocation · bb9b18fb

由 Thomas Graf 提交于 11月 30, 2013

Allocates a new sk_buff large enough to cover the specified payload
plus required Netlink headers. Will check receiving socket for
memory mapped i/o capability and use it if enabled. Will fall back
to non-mapped skb if message size exceeds the frame size of the ring.
Signed-of-by: NThomas Graf <tgraf@suug.ch>
Reviewed-by: NDaniel Borkmann <dborkman@redhat.com>
Signed-off-by: NJesse Gross <jesse@nicira.com>

bb9b18fb

29 11月, 2013 2 次提交

genetlink/pmcraid: use proper genetlink multicast API · 5e53e689

由 Johannes Berg 提交于 11月 24, 2013

The pmcraid driver is abusing the genetlink API and is using its
family ID as the multicast group ID, which is invalid and may
belong to somebody else (and likely will.)

Make it use the correct API, but since this may already be used
as-is by userspace, reserve a family ID for this code and also
reserve that group ID to not break userspace assumptions.

My previous patch broke event delivery in the driver as I missed
that it wasn't using the right API and forgot to update it later
in my series.

While changing this, I noticed that the genetlink code could use
the static group ID instead of a strcmp(), so also do that for
the VFS_DQUOT family.

Cc: Anil Ravindranath <anil_ravindranath@pmc-sierra.com>
Cc: "James E.J. Bottomley" <JBottomley@parallels.com>
Signed-off-by: NJohannes Berg <johannes.berg@intel.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

5e53e689

genetlink: Fix uninitialized variable in genl_validate_assign_mc_groups() · 0f0e2159

由 Geert Uytterhoeven 提交于 11月 23, 2013

net/netlink/genetlink.c: In function ‘genl_validate_assign_mc_groups’:
net/netlink/genetlink.c:217: warning: ‘err’ may be used uninitialized in this
function

Commit 2a94fe48 ("genetlink: make multicast
groups const, prevent abuse") split genl_register_mc_group() in multiple
functions, but dropped the initialization of err.

Initialize err to zero to fix this.
Signed-off-by: NGeert Uytterhoeven <geert@linux-m68k.org>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

0f0e2159

22 11月, 2013 1 次提交

genetlink: fix genlmsg_multicast() bug · 220815a9

由 Johannes Berg 提交于 11月 21, 2013

Unfortunately, I introduced a tremendously stupid bug into
genlmsg_multicast() when doing all those multicast group
changes: it adjusts the group number, but then passes it
to genlmsg_multicast_netns() which does that again.

Somehow, my tests failed to catch this, so add a warning
into genlmsg_multicast_netns() and remove the offending
group ID adjustment.

Also add a warning to the similar code in other functions
so people who misuse them are more loudly warned.
Signed-off-by: NJohannes Berg <johannes.berg@intel.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

220815a9

20 11月, 2013 7 次提交

genetlink: make multicast groups const, prevent abuse · 2a94fe48