Need to set dev features, use same values that are used in GREv6.
Signed-off-by: Tom Herbert <tom@herbertland.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This patch add a new fou6 module that provides encapsulation
operations for IPv6.
Signed-off-by: Tom Herbert <tom@herbertland.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Add encap_hlen and ip_tunnel_encap structure to ip6_tnl. Add functions
for getting encap hlen, setting up encap on a tunnel, performing
encapsulation operation.
Signed-off-by: Tom Herbert <tom@herbertland.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This patch adds receive path support for IPv6 with fou.
- Add address family to fou structure for open sockets. This supports
AF_INET and AF_INET6. Lookups for fou ports are performed on both the
port number and family.
- In fou and gue receive adjust tot_len in IPv4 header or payload_len
based on address family.
- Allow AF_INET6 in FOU_ATTR_AF netlink attribute.
Signed-off-by: Tom Herbert <tom@herbertland.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Create __fou_build_header and __gue_build_header. These implement the
protocol generic parts of building the fou and gue header.
fou_build_header and gue_build_header implement the IPv4 specific
functions and call the __*_build_header functions.
Signed-off-by: Tom Herbert <tom@herbertland.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Use helper function to set up UDP tunnel related information for a fou
socket.
Signed-off-by: Tom Herbert <tom@herbertland.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Consolidate all the ip_tunnel_encap definitions in one spot in the
header file. Also, move ip_encap_hlen and ip_tunnel_encap from
ip_tunnel.c to ip_tunnels.h so they call be called without a dependency
on ip_tunnel module. Similarly, move iptun_encaps to ip_tunnel_core.c.
Signed-off-by: Tom Herbert <tom@herbertland.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
When performing foo-over-UDP, UDP packets are processed by the
encapsulation handler which returns another protocol to process.
This may result in processing two (or more) protocols in the
loop that are marked as INET6_PROTO_FINAL. The actions taken
for hitting a final protocol, in particular the skb_postpull_rcsum
can only be performed once.
This patch set adds a check of a final protocol has been seen. The
rules are:
- If the final protocol has not been seen any protocol is processed
(final and non-final). In the case of a final protocol, the final
actions are taken (like the skb_postpull_rcsum)
- If a final protocol has been seen (e.g. an encapsulating UDP
header) then no further non-final protocols are allowed
(e.g. extension headers). For more final protocols the
final actions are not taken (e.g. skb_postpull_rcsum).
Signed-off-by: Tom Herbert <tom@herbertland.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
In ip6_input_finish the nexthdr protocol is retrieved from the
next header offset that is returned in the cb of the skb.
This method does not work for UDP encapsulation that may not
even have a concept of a nexthdr field (e.g. FOU).
This patch checks for a final protocol (INET6_PROTO_FINAL) when a
protocol handler returns > 0. If the protocol is not final then
resubmission is performed on nhoff value. If the protocol is final
then the nexthdr is taken to be the return value.
Signed-off-by: Tom Herbert <tom@herbertland.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This patch defines two new GSO definitions SKB_GSO_IPXIP4 and
SKB_GSO_IPXIP6 along with corresponding NETIF_F_GSO_IPXIP4 and
NETIF_F_GSO_IPXIP6. These are used to described IP in IP
tunnel and what the outer protocol is. The inner protocol
can be deduced from other GSO types (e.g. SKB_GSO_TCPV4 and
SKB_GSO_TCPV6). The GSO types of SKB_GSO_IPIP and SKB_GSO_SIT
are removed (these are both instances of SKB_GSO_IPXIP4).
SKB_GSO_IPXIP6 will be used when support for GSO with IP
encapsulation over IPv6 is added.
Signed-off-by: Tom Herbert <tom@herbertland.com>
Acked-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
In several gso_segment functions there are checks of gso_type against
a seemingly arbitrary list of SKB_GSO_* flags. This seems like an
attempt to identify unsupported GSO types, but since the stack is
the one that set these GSO types in the first place this seems
unnecessary to do. If a combination isn't valid in the first
place that stack should not allow setting it.
This is a code simplication especially for add new GSO types.
Signed-off-by: Tom Herbert <tom@herbertland.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Antonio Quartulli says:
====================
During the Wireless Battle Mesh v9 in Porto (PT) at the beginning of
May, we managed to uncover and fix some important bugs in our
new B.A.T.M.A.N. V algorithm. These are the fixes we came up with
together with others that I collected in the past weeks:
- avoid potential crash due to NULL pointer dereference in
B.A.T.M.A.N. V routine when a neigh_ifinfo object is not found, by
Sven Eckelmann
- avoid use-after-free of skb when counting outgoing bytes, by Florian
Westphal
- fix neigh_ifinfo object reference counting imbalance when using
B.A.T.M.A.N. V, by Sven Eckelmann. Such imbalance may lead to the
impossibility of releasing the related netdev object on shutdown
- avoid invalid memory access in case of error while allocating
bcast_own_sum when a new hard-interface is added, by Sven Eckelmann
- ensure originator address is updated in OMG/ELP packet content upon
primary interface address change, by Antonio Quartulli
- fix integer overflow when computing TQ metric (B.A.T.M.A.N. IV), by
Sven Eckelmann
- avoid race condition while adding new neigh_node which would result
in having two objects mapping to the same physical neighbour, by
Linus Lüssing
- ensure originator address is initialized in ELP packet content on
secondary interfaces, by Marek Lindner
====================
Signed-off-by: David S. Miller <davem@davemloft.net>
TCP stack can now run from process context.
Use read_lock_bh(&sk->sk_callback_lock) variant to restore previous
assumption.
Fixes: 5413d1babe ("net: do not block BH while processing socket backlog")
Fixes: d41a69f1d3 ("tcp: make tcp_sendmsg() aware of socket backlog")
Signed-off-by: Eric Dumazet <edumazet@google.com>
Cc: Jon Maloy <jon.maloy@ericsson.com>
Cc: Ying Xue <ying.xue@windriver.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
TCP stack can now run from process context.
Use read_lock_bh(&sk->sk_callback_lock) variant to restore previous
assumption.
Fixes: 5413d1babe ("net: do not block BH while processing socket backlog")
Fixes: d41a69f1d3 ("tcp: make tcp_sendmsg() aware of socket backlog")
Signed-off-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
skb_splice_bits() returns int, kcm_splice_read() returns ssize_t,
both are signed.
We may need another patch to make them all ssize_t, but that
deserves a separated patch.
Fixes: 91687355b9 ("kcm: Splice support")
Reported-by: David Binderman <linuxdev.baldrick@gmail.com>
Cc: Tom Herbert <tom@herbertland.com>
Signed-off-by: Cong Wang <xiyou.wangcong@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Pull security subsystem updates from James Morris:
"Highlights:
- A new LSM, "LoadPin", from Kees Cook is added, which allows forcing
of modules and firmware to be loaded from a specific device (this
is from ChromeOS, where the device as a whole is verified
cryptographically via dm-verity).
This is disabled by default but can be configured to be enabled by
default (don't do this if you don't know what you're doing).
- Keys: allow authentication data to be stored in an asymmetric key.
Lots of general fixes and updates.
- SELinux: add restrictions for loading of kernel modules via
finit_module(). Distinguish non-init user namespace capability
checks. Apply execstack check on thread stacks"
* 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/jmorris/linux-security: (48 commits)
LSM: LoadPin: provide enablement CONFIG
Yama: use atomic allocations when reporting
seccomp: Fix comment typo
ima: add support for creating files using the mknodat syscall
ima: fix ima_inode_post_setattr
vfs: forbid write access when reading a file into memory
fs: fix over-zealous use of "const"
selinux: apply execstack check on thread stacks
selinux: distinguish non-init user namespace capability checks
LSM: LoadPin for kernel file loading restrictions
fs: define a string representation of the kernel_read_file_id enumeration
Yama: consolidate error reporting
string_helpers: add kstrdup_quotable_file
string_helpers: add kstrdup_quotable_cmdline
string_helpers: add kstrdup_quotable
selinux: check ss_initialized before revalidating an inode label
selinux: delay inode label lookup as long as possible
selinux: don't revalidate an inode's label when explicitly setting it
selinux: Change bool variable name to index.
KEYS: Add KEYCTL_DH_COMPUTE command
...
This fix prevents nodes to wrongly create a 00:00:00:00:00:00 originator
which can potentially interfere with the rest of the neighbor statistics.
Fixes: d6f94d91f7 ("batman-adv: ELP - adding basic infrastructure")
Signed-off-by: Marek Lindner <mareklindner@neomailbox.ch>
Signed-off-by: Antonio Quartulli <a@unstable.cc>
The undefined behavior sanatizer detected an signed integer overflow in a
setup with near perfect link quality
UBSAN: Undefined behaviour in net/batman-adv/bat_iv_ogm.c:1246:25
signed integer overflow:
8713350 * 255 cannot be represented in type 'int'
The problems happens because the calculation of mixed unsigned and signed
integers resulted in an integer multiplication.
batadv_ogm_packet::tq (u8 255)
* tq_own (u8 255)
* tq_asym_penalty (int 134; max 255)
* tq_iface_penalty (int 255; max 255)
The tq_iface_penalty, tq_asym_penalty and inv_asym_penalty can just be
changed to unsigned int because they are not expected to become negative.
Fixes: c039876892 ("batman-adv: add WiFi penalty")
Signed-off-by: Sven Eckelmann <sven.eckelmann@open-mesh.com>
Signed-off-by: Marek Lindner <mareklindner@neomailbox.ch>
Signed-off-by: Antonio Quartulli <a@unstable.cc>
When the MAC address of the primary interface is changed,
update the originator address in the ELP and OGM skb buffers as
well in order to reflect the change.
Fixes: d6f94d91f7 ("batman-adv: ELP - adding basic infrastructure")
Reported-by: Marek Lindner <marek@neomailbox.ch>
Signed-off-by: Antonio Quartulli <a@unstable.cc>
The function batadv_iv_ogm_orig_add_if allocates new buffers for bcast_own
and bcast_own_sum. It is expected that these buffers are unchanged in case
either bcast_own or bcast_own_sum couldn't be resized.
But the error handling of this function frees the already resized buffer
for bcast_own when the allocation of the new bcast_own_sum buffer failed.
This will lead to an invalid memory access when some code will try to
access bcast_own.
Instead the resized new bcast_own buffer has to be kept. This will not lead
to problems because the size of the buffer was only increased and therefore
no user of the buffer will try to access bytes outside of the new buffer.
Fixes: d0015fdd3d ("batman-adv: provide orig_node routing API")
Signed-off-by: Sven Eckelmann <sven@narfation.org>
Signed-off-by: Marek Lindner <mareklindner@neomailbox.ch>
Signed-off-by: Antonio Quartulli <a@unstable.cc>
Tom Herbert
David S. Miller
Eric Dumazet
WANG Cong
Linus Torvalds
Marek Lindner
Linus Lüssing
Sven Eckelmann
Antonio Quartulli
Sven Eckelmann