- 17 Dec, 2016 32 commits
-
-
Kees Cook authored
Prepare to mark sensitive kernel structures for randomization by making sure they're using designated initializers. These were identified during allyesconfig builds of x86, arm, and arm64, with most initializer fixes extracted from grsecurity. Signed-off-by:
Kees Cook <keescook@chromium.org> Signed-off-by:
David S. Miller <davem@davemloft.net>
-
David S. Miller authored
John Fastabend says: ==================== XDP for virtio_net This implements virtio_net for the mergeable buffers and big_packet modes. I tested this with vhost_net running on qemu and did not see any issues. For testing num_buf > 1 I added a hack to vhost driver to only but 100 bytes per buffer. There are some restrictions for XDP to be enabled and work well (see patch 3) for more details. 1. GUEST_TSO{4|6} must be off 2. MTU must be less than PAGE_SIZE 3. queues must be available to dedicate to XDP 4. num_bufs received in mergeable buffers must be 1 5. big_packet mode must have all data on single page To test this I used pktgen in the hypervisor and ran the XDP sample programs xdp1 and xdp2 from ./samples/bpf in the host. The default mode that is used with these patches with Linux guest and QEMU/Linux hypervisor is the mergeable buffers mode. I tested this mode for 2+ days running xdp2 without issues. Additionally I did a series of driver unload/load tests to check the allocate/release paths. To test the big_packets path I applied the following simple patch against the virtio driver forcing big_packets mode, --- a/drivers/net/virtio_net.c +++ b/drivers/net/virtio_net.c @@ -2242,7 +2242,7 @@ static int virtnet_probe(struct virtio_device *vdev) vi->big_packets = true; if (virtio_has_feature(vdev, VIRTIO_NET_F_MRG_RXBUF)) - vi->mergeable_rx_bufs = true; + vi->mergeable_rx_bufs = false; if (virtio_has_feature(vdev, VIRTIO_NET_F_MRG_RXBUF) || virtio_has_feature(vdev, VIRTIO_F_VERSION_1)) I then repeated the tests with xdp1 and xdp2. After letting them run for a few hours I called it good enough. Testing the unexpected case where virtio receives a packet across multiple buffers required patching the hypervisor vhost driver to convince it to send these unexpected packets. Then I used ping with the -s option to trigger the case with multiple buffers. This mode is not expected to be used but as MST pointed out per spec it is not strictly speaking illegal to generate multi-buffer packets so we need someway to handle these. The following patch can be used to generate multiple buffers, --- a/drivers/vhost/vhost.c +++ b/drivers/vhost/vhost.c @@ -1777,7 +1777,8 @@ static int translate_desc(struct vhost_virtqueue *vq, u64 _iov = iov + ret; size = node->size - addr + node->start; - _iov->iov_len = min((u64)len - s, size); + printk("%s: build 100 length headers!\n", __func__); + _iov->iov_len = min((u64)len - s, (u64)100);//size); _iov->iov_base = (void __user *)(unsigned long) (node->userspace_addr + addr - node->start); s += size; The qemu command I most frequently used for testing (although I did test various other combinations of devices) is the following, ./x86_64-softmmu/qemu-system-x86_64 \ -hda /var/lib/libvirt/images/Fedora-test0.img \ -m 4096 -enable-kvm -smp 2 \ -netdev tap,id=hn0,queues=4,vhost=on \ -device virtio-net-pci,netdev=hn0,mq=on,vectors=9,guest_tso4=off,guest_tso6=off \ -serial stdio The options 'guest_tso4=off,guest_tso6=off' are required because we do not support LRO with XDP at the moment. Please review any comments/feedback welcome as always. ==================== Acked-by:Michael S. Tsirkin <mst@redhat.com> Signed-off-by:
-
John Fastabend authored
virtio_net XDP support expects receive buffers to be contiguous. If this is not the case we enable a slowpath to allow connectivity to continue but at a significan performance overhead associated with linearizing data. To make it painfully aware to users that XDP is running in a degraded mode we throw an xdp buffer error. To linearize packets we allocate a page and copy the segments of the data, including the header, into it. After this the page can be handled by XDP code flow as normal. Then depending on the return code the page is either freed or sent to the XDP xmit path. There is no attempt to optimize this path. This case is being handled simple as a precaution in case some unknown backend were to generate packets in this form. To test this I had to hack qemu and force it to generate these packets. I do not expect this case to be generated by "real" backends. Signed-off-by:
John Fastabend <john.r.fastabend@intel.com> Signed-off-by:
-
John Fastabend authored
This adds support for the XDP_TX action to virtio_net. When an XDP program is run and returns the XDP_TX action the virtio_net XDP implementation will transmit the packet on a TX queue that aligns with the current CPU that the XDP packet was processed on. Before sending the packet the header is zeroed. Also XDP is expected to handle checksum correctly so no checksum offload support is provided. Signed-off-by:
-
John Fastabend authored
XDP requires using isolated transmit queues to avoid interference with normal networking stack (BQL, NETDEV_TX_BUSY, etc). This patch adds a XDP queue per cpu when a XDP program is loaded and does not expose the queues to the OS via the normal API call to netif_set_real_num_tx_queues(). This way the stack will never push an skb to these queues. However virtio/vhost/qemu implementation only allows for creating TX/RX queue pairs at this time so creating only TX queues was not possible. And because the associated RX queues are being created I went ahead and exposed these to the stack and let the backend use them. This creates more RX queues visible to the network stack than TX queues which is worth mentioning but does not cause any issues as far as I can tell. Signed-off-by:
-
John Fastabend authored
This adds XDP support to virtio_net. Some requirements must be met for XDP to be enabled depending on the mode. First it will only be supported with LRO disabled so that data is not pushed across multiple buffers. Second the MTU must be less than a page size to avoid having to handle XDP across multiple pages. If mergeable receive is enabled this patch only supports the case where header and data are in the same buf which we can check when a packet is received by looking at num_buf. If the num_buf is greater than 1 and a XDP program is loaded the packet is dropped and a warning is thrown. When any_header_sg is set this does not happen and both header and data is put in a single buffer as expected so we check this when XDP programs are loaded. Subsequent patches will process the packet in a degraded mode to ensure connectivity and correctness is not lost even if backend pushes packets into multiple buffers. If big packets mode is enabled and MTU/LRO conditions above are met then XDP is allowed. This patch was tested with qemu with vhost=on and vhost=off where mergeable and big_packet modes were forced via hard coding feature negotiation. Multiple buffers per packet was forced via a small test patch to vhost.c in the vhost=on qemu mode. Suggested-by:
Shrijeet Mukherjee <shrijeet@gmail.com> Signed-off-by:
-
John Fastabend authored
This adds a warning for drivers to use when encountering an invalid buffer for XDP. For normal cases this should not happen but to catch this in virtual/qemu setups that I may not have expected from the emulation layer having a standard warning is useful. Signed-off-by:
-
Xin Long authored
Prior to this patch, sctp_transport_lookup_process didn't rcu_read_unlock when it failed to find a transport by sctp_addrs_lookup_transport. This patch is to fix it by moving up rcu_read_unlock right before checking transport and also to remove the out path. Fixes: 1cceda78 ("sctp: fix the issue sctp_diag uses lock_sock in rcu_read_lock") Signed-off-by:
Xin Long <lucien.xin@gmail.com> Acked-by:
Marcelo Ricardo Leitner <marcelo.leitner@gmail.com> Signed-off-by:
-
Xin Long authored
Since commit 7fda702f ("sctp: use new rhlist interface on sctp transport rhashtable"), sctp has changed to use rhlist_lookup to look up transport, but rhlist_lookup doesn't call rcu_read_lock inside, unlike rhashtable_lookup_fast. It is called in sctp_epaddr_lookup_transport and sctp_addrs_lookup_transport. sctp_addrs_lookup_transport is always in the protection of rcu_read_lock(), as __sctp_lookup_association is called in rx path or sctp_lookup_association which are in the protection of rcu_read_lock() already. But sctp_epaddr_lookup_transport is called by sctp_endpoint_lookup_assoc, it doesn't call rcu_read_lock, which may cause "suspicious rcu_dereference_check usage' in __rhashtable_lookup. This patch is to fix it by adding rcu_read_lock in sctp_endpoint_lookup_assoc before calling sctp_epaddr_lookup_transport. Fixes: 7fda702f ("sctp: use new rhlist interface on sctp transport rhashtable") Reported-by:
Dmitry Vyukov <dvyukov@google.com> Signed-off-by:
-
David S. Miller authored
Madalin Bucur says: ==================== dpaa_eth: a couple of fixes This patch set introduces big endian accessors in the dpaa_eth driver making sure accesses to the QBMan HW are correct on little endian platforms. Removing a redundant Kconfig dependency on FSL_SOC. Adding myself as maintainer of the dpaa_eth driver. ==================== Signed-off-by: -
Madalin Bucur authored
Add record for Freescale QORIQ DPAA Ethernet driver adding myself as maintainer. Signed-off-by:
Madalin Bucur <madalin.bucur@nxp.com> Signed-off-by:
-
Madalin Bucur authored
Signed-off-by:
-
Claudiu Manoil authored
Ensure correct access to the big endian QMan HW through proper accessors. Signed-off-by:
Claudiu Manoil <claudiu.manoil@nxp.com> Signed-off-by:
-
LABBE Corentin authored
Since the struct miscdevice have many members, it is dangerous to init it without members name relying only on member order. This patch add member name to the init declaration. Signed-off-by:
Corentin Labbe <clabbe.montjoie@gmail.com> Signed-off-by:
-
LABBE Corentin authored
The IRNET_MAJOR define is not used, so this patch remove it. Signed-off-by:
-
LABBE Corentin authored
This patch move the define for IRNET_MINOR to include/linux/miscdevice.h It is better that all minor number definitions are in the same place. Signed-off-by:
Greg Kroah-Hartman <gregkh@linuxfoundation.org> Signed-off-by:
-
LABBE Corentin authored
The only use of miscdevice is irda_ppp so no need to include linux/miscdevice.h for all irda files. This patch move the linux/miscdevice.h include to irnet_ppp.h Signed-off-by:
-
LABBE Corentin authored
irproc.c does not use any miscdevice so this patch remove this unnecessary inclusion. Signed-off-by:
-
Daniel Mack authored
The member 'effective' in 'struct cgroup_bpf' is protected by RCU. Annotate it accordingly to squelch a sparse warning. Signed-off-by:
Daniel Mack <daniel@zonque.org> Acked-by:
Alexei Starovoitov <ast@kernel.org> Signed-off-by:
-
David S. Miller authored
Tom Herbert says: ==================== inet: Fixes for inet_csk_get_port and soreusport This patch set fixes a couple of issues I noticed while debugging our softlockup issue in inet_csk_get_port. - Don't allow jump into port scan in inet_csk_get_port if function was called with non-zero port number (looking up explicit port number). - When inet_csk_get_port is called with zero port number (ie. perform scan) an reuseport is set on the socket, don't match sockets that also have reuseport set. The intent from the user should be to get a new port number and then explictly bind other sockets to that number using soreuseport. Tested: Ran first patch on production workload with no ill effect. For second patch, ran a little listener application and first demonstrated that unbound sockets with soreuseport can indeed be bound to unrelated soreuseport sockets. ==================== Signed-off-by: -
Tom Herbert authored
A user may call listen with binding an explicit port with the intent that the kernel will assign an available port to the socket. In this case inet_csk_get_port does a port scan. For such sockets, the user may also set soreuseport with the intent a creating more sockets for the port that is selected. The problem is that the initial socket being opened could inadvertently choose an existing and unreleated port number that was already created with soreuseport. This patch adds a boolean parameter to inet_bind_conflict that indicates rather soreuseport is allowed for the check (in addition to sk->sk_reuseport). In calls to inet_bind_conflict from inet_csk_get_port the argument is set to true if an explicit port is being looked up (snum argument is nonzero), and is false if port scan is done. Signed-off-by:
Tom Herbert <tom@herbertland.com> Signed-off-by:
-
Tom Herbert authored
inet_csk_get_port is called with port number (snum argument) that may be zero or nonzero. If it is zero, then the intent is to find an available ephemeral port number to bind to. If snum is non-zero then the caller is asking to allocate a specific port number. In the latter case we never want to perform the scan in ephemeral port range. It is conceivable that this can happen if the "goto again" in "tb_found:" is done. This patch adds a check that snum is zero before doing the "goto again". Signed-off-by:
-
Daniel Borkmann authored
Running ./test_verifier as unprivileged lets 1 out of 98 tests fail: [...] #71 unpriv: check that printk is disallowed FAIL Unexpected error message! 0: (7a) *(u64 *)(r10 -8) = 0 1: (bf) r1 = r10 2: (07) r1 += -8 3: (b7) r2 = 8 4: (bf) r3 = r1 5: (85) call bpf_trace_printk#6 unknown func bpf_trace_printk#6 [...] The test case is correct, just that the error outcome changed with ebb676da ("bpf: Print function name in addition to function id"). Same as with e00c7b21 ("bpf: fix multiple issues in selftest suite and samples") issue 2), so just fix up the function name. Fixes: ebb676da ("bpf: Print function name in addition to function id") Signed-off-by:
Daniel Borkmann <daniel@iogearbox.net> Acked-by:
-
Daniel Borkmann authored
Commit 57a09bf0 ("bpf: Detect identical PTR_TO_MAP_VALUE_OR_NULL registers") introduced a regression where existing programs stopped loading due to reaching the verifier's maximum complexity limit, whereas prior to this commit they were loading just fine; the affected program has roughly 2k instructions. What was found is that state pruning couldn't be performed effectively anymore due to mismatches of the verifier's register state, in particular in the id tracking. It doesn't mean that 57a09bf0 is incorrect per se, but rather that verifier needs to perform a lot more work for the same program with regards to involved map lookups. Since commit 57a09bf0 is only about tracking registers with type PTR_TO_MAP_VALUE_OR_NULL, the id is only needed to follow registers until they are promoted through pattern matching with a NULL check to either PTR_TO_MAP_VALUE or UNKNOWN_VALUE type. After that point, the id becomes irrelevant for the transitioned types. For UNKNOWN_VALUE, id is already reset to 0 via mark_reg_unknown_value(), but not so for PTR_TO_MAP_VALUE where id is becoming stale. It's even transferred further into other types that don't make use of it. Among others, one example is where UNKNOWN_VALUE is set on function call return with RET_INTEGER return type. states_equal() will then fall through the memcmp() on register state; note that the second memcmp() uses offsetofend(), so the id is part of that since d2a4dd37 ("bpf: fix state equivalence"). But the bisect pointed already to 57a09bf0, where we really reach beyond complexity limit. What I found was that states_equal() often failed in this case due to id mismatches in spilled regs with registers in type PTR_TO_MAP_VALUE. Unlike non-spilled regs, spilled regs just perform a memcmp() on their reg state and don't have any other optimizations in place, therefore also id was relevant in this case for making a pruning decision. We can safely reset id to 0 as well when converting to PTR_TO_MAP_VALUE. For the affected program, it resulted in a ~17 fold reduction of complexity and let the program load fine again. Selftest suite also runs fine. The only other place where env->id_gen is used currently is through direct packet access, but for these cases id is long living, thus a different scenario. Also, the current logic in mark_map_regs() is not fully correct when marking NULL branch with UNKNOWN_VALUE. We need to cache the destination reg's id in any case. Otherwise, once we marked that reg as UNKNOWN_VALUE, it's id is reset and any subsequent registers that hold the original id and are of type PTR_TO_MAP_VALUE_OR_NULL won't be marked UNKNOWN_VALUE anymore, since mark_map_reg() reuses the uncached regs[regno].id that was just overridden. Note, we don't need to cache it outside of mark_map_regs(), since it's called once on this_branch and the other time on other_branch, which are both two independent verifier states. A test case for this is added here, too. Fixes: 57a09bf0 ("bpf: Detect identical PTR_TO_MAP_VALUE_OR_NULL registers") Signed-off-by:
Thomas Graf <tgraf@suug.ch> Acked-by:
-
David Ahern authored
Locally originated traffic in a VRF fails in the presence of a POSTROUTING rule. For example, $ iptables -t nat -A POSTROUTING -s 11.1.1.0/24 -j MASQUERADE $ ping -I red -c1 11.1.1.3 ping: Warning: source address might be selected on device other than red. PING 11.1.1.3 (11.1.1.3) from 11.1.1.2 red: 56(84) bytes of data. ping: sendmsg: Operation not permitted Worse, the above causes random corruption resulting in a panic in random places (I have not seen a consistent backtrace). Call nf_reset to drop the conntrack info following the pass through the VRF device. The nf_reset is needed on Tx but not Rx because of the order in which NF_HOOK's are hit: on Rx the VRF device is after the real ingress device and on Tx it is is before the real egress device. Connection tracking should be tied to the real egress device and not the VRF device. Fixes: 8f58336d ("net: Add ethernet header for pass through VRF device") Fixes: 35402e31 ("net: Add IPv6 support to VRF device") Signed-off-by:David Ahern <dsa@cumulusnetworks.com> Signed-off-by:
-
David Ahern authored
Connection tracking with VRF is broken because the pass through the VRF device drops the connection tracking info. Removing the call to nf_reset allows DNAT and MASQUERADE to work across interfaces within a VRF. Fixes: 73e20b76 ("net: vrf: Add support for PREROUTING rules on vrf device") Signed-off-by:
-
David S. Miller authored
Paul Blakey says: ==================== net/sched: cls_flower: Fix mask handling The series fix how the mask is being handled. ==================== Signed-off-by: -
Paul Blakey authored
Zero bits on the mask signify a "don't care" on the corresponding bits in key. Some HWs require those bits on the key to be zero. Since these bits are masked anyway, it's okay to provide the masked key to all drivers. Fixes: 5b33f488 ('net/flower: Introduce hardware offload support') Signed-off-by:
Paul Blakey <paulb@mellanox.com> Reviewed-by:
Roi Dayan <roid@mellanox.com> Acked-by:
Jiri Pirko <jiri@mellanox.com> Signed-off-by:
-
Paul Blakey authored
When addr_type is set, mask should also be set. Fixes: 66530bdf ('sched,cls_flower: set key address type when present') Fixes: bc3103f1 ('net/sched: cls_flower: Classify packet in ip tunnels') Signed-off-by:
-
Bartosz Folta authored
There are hardware PCI implementations of Cadence GEM network controller. This patch will allow to use such hardware with reuse of existing Platform Driver. Signed-off-by:
Bartosz Folta <bfolta@cadence.com> Signed-off-by:
-
Thomas Falcon authored
Include calculations to compute the number of segments that comprise an aggregated large packet. Signed-off-by:
Thomas Falcon <tlfalcon@linux.vnet.ibm.com> Reviewed-by:
Jonathan Maxwell <jmaxwell37@gmail.com> Signed-off-by:
-
Timur Tabi authored
On ACPI systems, clocks are not available to drivers directly. They are handled exclusively by ACPI and/or firmware, so there is no clock driver. Calls to clk_get() always fail, so we should not even attempt to claim any clocks on ACPI systems. Signed-off-by:
Timur Tabi <timur@codeaurora.org> Reviewed-by:
Florian Fainelli <f.fainelli@gmail.com> Signed-off-by:
-
- 16 Dec, 2016 7 commits
-
-
Jeroen De Wachter authored
Signed-off-by:
Jeroen De Wachter <jeroen.de_wachter.ext@nokia.com> Signed-off-by:
-
Jeroen De Wachter authored
Before, encx24j600_rx_packets did not update encx24j600_priv's next_packet member when an error occurred during packet handling (either because the packet's RSV header indicates an error or because the encx24j600_receive_packet method can't allocate an sk_buff). If the next_packet member is not updated, the ERXTAIL register will be set to the same value it had before, which means the bad packet remains in the component's memory and its RSV header will be read again when a new packet arrives. If the RSV header indicates a bad packet or if sk_buff allocation continues to fail, new packets will be stored in the component's memory until that memory is full, after which packets will be dropped. The SETPKTDEC command is always executed though, so the encx24j600 hardware has an incorrect count of the packets in its memory. To prevent this, the next_packet member should always be updated, allowing the packet to be skipped (either because it's bad, as indicated in its RSV header, or because allocating an sk_buff failed). In the allocation failure case, this does mean dropping a valid packet, but dropping the oldest packet to keep as much memory as possible available for new packets seems preferable to keeping old (but valid) packets around while dropping new ones. Signed-off-by:
-
David S. Miller authored
Dongpo Li says: ==================== net: ethernet: hisilicon: set dev->dev.parent before PHY connect This patch series builds atop: ec988ad7 ("phy: Don't increment MDIO bus refcount unless it's a different owner") I have checked all the hisilicon ethernet driver and found only two drivers need to be fixed to make sure set dev->dev.parent before PHY connect. ==================== Signed-off-by:
-
Dongpo Li authored
The hip04 driver calls into PHYLIB which now checks for net_device->dev.parent, so make sure we do set it before calling into any MDIO/PHYLIB related function. Fixes: ec988ad7 ("phy: Don't increment MDIO bus refcount unless it's a different owner") Signed-off-by:
Dongpo Li <lidongpo@hisilicon.com> Reviewed-by:
-
Dongpo Li authored
The hisi_femac driver calls into PHYLIB which now checks for net_device->dev.parent, so make sure we do set it before calling into any MDIO/PHYLIB related function. Fixes: ec988ad7 ("phy: Don't increment MDIO bus refcount unless it's a different owner") Signed-off-by:
-
Andrew Lunn authored
A port is not necessarily assigned to a netdev. And a port does not need to be a member of a bridge. So when iterating over all ports, check before using the netdev and bridge_dev for a port. Otherwise we dereference a NULL pointer. Fixes: da9c359e ("net: dsa: mv88e6xxx: check hardware VLAN in use") Signed-off-by:
Andrew Lunn <andrew@lunn.ch> Reviewed-by:
Vivien Didelot <vivien.didelot@savoirfairelinux.com> Signed-off-by:
-
Thomas Gleixner authored
The timer handling in this driver is broken in several ways: - corkscrew_open() initializes and arms a timer before requesting the device interrupt. If the request fails the timer stays armed. A second call to corkscrew_open will unconditionally reinitialize the quued timer and arm it again. Also a immediate device removal will leave the timer queued because close() is not called (open() failed) and therefore nothing issues del_timer(). The reinitialization corrupts the link chain in the timer wheel hash bucket and causes a NULL pointer dereference when the timer wheel tries to operate on that hash bucket. Immediate device removal lets the link chain poke into freed and possibly reused memory. Solution: Arm the timer after the successful irq request. - corkscrew_close() uses del_timer() On close the timer is disarmed with del_timer() which lets the following code race against a concurrent timer expiry function. Solution: Use del_timer_sync() instead - corkscrew_close() calls del_timer() unconditionally del_timer() is invoked even if the timer was never initialized. This works by chance because the struct containing the timer is zeroed at allocation time. Solution: Move the setup of the timer into corkscrew_setup(). Reported-by:
Matthew Whitehead <tedheadster@gmail.com> Signed-off-by:
Thomas Gleixner <tglx@linutronix.de> Cc: Andy Lutomirski <luto@kernel.org> Cc: netdev@vger.kernel.org Signed-off-by:
-
- 13 Dec, 2016 1 commit
-
-
Alexey Dobriyan authored
Commit 4f7df337 "netlink: 2-clause nla_ok()" is BROKEN. First clause tests if "->nla_len" could even be accessed at all, it can not possibly be omitted. Signed-off-by:
Alexey Dobriyan <adobriyan@gmail.com> Signed-off-by:
-
