Anssi Hannula says:

====================
net: macb: DMA race condition fixes

Here are a couple of race condition fixes for the macb driver. The first
two are for issues observed at runtime on real HW.

v2:
- added received Tested-bys and Acked-bys to the first two patches
- in patch 3/3, moved the timestamp protection barrier closer to the
  timestamp reads
- in patch 3/3, removed unnecessary move of the addr assignment in
  gem_rx() to keep the patch minimal for maximum clarity
- in patch 3/3, clarified commit message and comments

The 3/3 is the same one I improperly sent last week as a standalone
patch.
====================
Signed-off-by: David S. Miller <davem@davemloft.net>

When reading buffer descriptors on RX or on TX completion, an
RX_USED/TX_USED bit is checked first to ensure that the descriptors have
been populated, i.e. the ownership has been transferred. However, there
are no memory barriers to ensure that the data protected by the
RX_USED/TX_USED bit is up-to-date with respect to that bit.

Specifically:

- TX timestamp descriptors may be loaded before ctrl is loaded for the
  TX_USED check, which is racy as the descriptors may be updated between
  the loads, causing old timestamp descriptor data to be used.

- RX ctrl may be loaded before addr is loaded for the RX_USED check,
  which is racy as a new frame may be written between the loads, causing
  old ctrl descriptor data to be used.
  This issue exists for both macb_rx() and gem_rx() variants.

Fix the races by adding DMA read memory barriers on those paths and
reordering the reads in macb_rx().

I have not observed any actual problems in practice caused by these
being missing, though.

Tested on a ZynqMP based system.

Fixes: 89e5785f ("[PATCH] Atmel MACB ethernet driver")
Signed-off-by: Anssi Hannula <anssi.hannula@bitwise.fi>
Cc: Nicolas Ferre <nicolas.ferre@microchip.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

Bit RX_USED set to 0 in the address field allows the controller to write
data to the receive buffer descriptor.

The driver does not ensure the ctrl field is ready (cleared) when the
controller sees the RX_USED=0 written by the driver. The ctrl field might
only be cleared after the controller has already updated it according to
a newly received frame, causing the frame to be discarded in gem_rx() due
to unexpected ctrl field contents.

A message is logged when the above scenario occurs:

  macb ff0b0000.ethernet eth0: not whole frame pointed by descriptor

Fix the issue by ensuring that when the controller sees RX_USED=0 the
ctrl field is already cleared.

This issue was observed on a ZynqMP based system.

Fixes: 4df95131 ("net/macb: change RX path for GEM")
Signed-off-by: Anssi Hannula <anssi.hannula@bitwise.fi>
Tested-by: Claudiu Beznea <claudiu.beznea@microchip.com>
Cc: Nicolas Ferre <nicolas.ferre@microchip.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

64-bit DMA addresses are split in upper and lower halves that are
written in separate fields on GEM. For RX, bit 0 of the address is used
as the ownership bit (RX_USED). When the RX_USED bit is unset the
controller is allowed to write data to the buffer.

The driver does not guarantee that the controller already sees the upper
half when the RX_USED bit is cleared, possibly resulting in the
controller writing an incoming frame to an address with an incorrect
upper half and therefore possibly corrupting unrelated system memory.

Fix that by adding the necessary DMA memory barrier between the writes.

This corruption was observed on a ZynqMP based system.

Fixes: fff8019a ("net: macb: Add 64 bit addressing support for GEM")
Signed-off-by: Anssi Hannula <anssi.hannula@bitwise.fi>
Acked-by: Harini Katakam <harini.katakam@xilinx.com>
Tested-by: Claudiu Beznea <claudiu.beznea@microchip.com>
Cc: Nicolas Ferre <nicolas.ferre@microchip.com>
Cc: Michal Simek <michal.simek@xilinx.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

Herton reports the following error when building a userspace program that
includes net_stamp.h:

 In file included from foo.c:2:
 /usr/include/linux/net_tstamp.h:158:2: error: unknown type name
 ‘clockid_t’
   clockid_t clockid; /* reference clockid */
   ^~~~~~~~~

Fix it by using __kernel_clockid_t in place of clockid_t.

Fixes: 80b14dee ("net: Add a new socket option for a future transmit time.")
Cc: Timothy Redaelli <tredaelli@redhat.com>
Reported-by: Herton R. Krzesinski <herton@redhat.com>
Signed-off-by: Davide Caratti <dcaratti@redhat.com>
Tested-by: Paolo Abeni <pabeni@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

On some platforms (currently detected only on SAMA5D4) TX might stuck
even the pachets are still present in DMA memories and TX start was
issued for them. This happens due to race condition between MACB driver
updating next TX buffer descriptor to be used and IP reading the same
descriptor. In such a case, the "TX USED BIT READ" interrupt is asserted.
GEM/MACB user guide specifies that if a "TX USED BIT READ" interrupt
is asserted TX must be restarted. Restart TX if used bit is read and
packets are present in software TX queue. Packets are removed from software
TX queue if TX was successful for them (see macb_tx_interrupt()).
Signed-off-by: Claudiu Beznea <claudiu.beznea@microchip.com>
Acked-by: Nicolas Ferre <nicolas.ferre@microchip.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

The function should return an error if create_singlethread_workqueue()
fails.

Fixes: 34877a15 ("net: stmmac: Rework and fix TX Timeout code")
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

Similar to commit 143ece65 ("tipc: check tsk->group in tipc_wait_for_cond()")
we have to reload grp->dests too after we re-take the sock lock.
This means we need to move the dsts check after tipc_wait_for_cond()
too.

Fixes: 75da2163 ("tipc: introduce communication groups")
Reported-and-tested-by: syzbot+99f20222fc5018d2b97a@syzkaller.appspotmail.com
Cc: Ying Xue <ying.xue@windriver.com>
Cc: Jon Maloy <jon.maloy@ericsson.com>
Signed-off-by: Cong Wang <xiyou.wangcong@gmail.com>
Acked-by: Jon Maloy <jon.maloy@ericsson.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

We accidentally deleted the code to set "rc = -ENOMEM;" and this patch
adds it back.

Fixes: d2201a21 ("qed: No need for LL2 frags indication")
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

The mvpp2_phylink_validate() function sets all modes that are
supported by a given PPv2 port. A recent change made all ports to
advertise they support 10G modes in certain cases. This is not true,
as only the port #0 can do so. This patch fixes it.

Fixes: 01b3fd5a ("net: mvpp2: fix detection of 10G SFP modules")
Cc: Baruch Siach <baruch@tkos.co.il>
Signed-off-by: Antoine Tenart <antoine.tenart@bootlin.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

If a server side socket is bound to an address, but not in the listening
state yet, incoming connection requests should receive a reset control
packet in response. However, the function used to send the reset
silently drops the reset packet if the sending socket isn't bound
to a remote address (as is the case for a bound socket not yet in
the listening state). This change fixes this by using the src
of the incoming packet as destination for the reset packet in
this case.

Fixes: d021c344 ("VSOCK: Introduce VM Sockets")
Reviewed-by: Adit Ranadive <aditr@vmware.com>
Reviewed-by: Vishnu Dasa <vdasa@vmware.com>
Signed-off-by: Jorgen Hansen <jhansen@vmware.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

Steffen Klassert says:

====================
pull request (net): ipsec 2018-12-18

1) Fix error return code in xfrm_output_one()
   when no dst_entry is attached to the skb.
   From Wei Yongjun.

2) The xfrm state hash bucket count reported to
   userspace is off by one. Fix from Benjamin Poirier.

3) Fix NULL pointer dereference in xfrm_input when
   skb_dst_force clears the dst_entry.

4) Fix freeing of xfrm states on acquire. We use a
   dedicated slab cache for the xfrm states now,
   so free it properly with kmem_cache_free.
   From Mathias Krause.

Please pull or let me know if there are problems.
====================
Signed-off-by: David S. Miller <davem@davemloft.net>

Ido Schimmel says:

====================
mlxsw: VXLAN and firmware flashing fixes

Patch #1 fixes firmware flashing failures by increasing the time period
after which the driver fails the transaction with the firmware. The
problem is explained in detail in the commit message.

Patch #2 adds a missing trap for decapsulated ARP packets. It is
necessary for VXLAN routing to work.

Patch #3 fixes a memory leak during driver reload caused by NULLing a
pointer before kfree().

Please consider patch #1 for 4.19.y
====================
Signed-off-by: David S. Miller <davem@davemloft.net>

The pointer was NULLed before freeing the memory, resulting in a memory
leak. Trace from kmemleak:

unreferenced object 0xffff88820ae36528 (size 512):
  comm "devlink", pid 5374, jiffies 4295354033 (age 10829.296s)
  hex dump (first 32 bytes):
    00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
    00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
  backtrace:
    [<00000000a43f5195>] kmem_cache_alloc_trace+0x1be/0x330
    [<00000000312f8140>] mlxsw_sp_nve_init+0xcb/0x1ae0
    [<0000000009201d22>] mlxsw_sp_init+0x1382/0x2690
    [<000000007227d877>] mlxsw_sp1_init+0x1b5/0x260
    [<000000004a16feec>] __mlxsw_core_bus_device_register+0x776/0x1360
    [<0000000070ab954c>] mlxsw_devlink_core_bus_device_reload+0x129/0x220
    [<00000000432313d5>] devlink_nl_cmd_reload+0x119/0x1e0
    [<000000003821a06b>] genl_family_rcv_msg+0x813/0x1150
    [<00000000d54d04c0>] genl_rcv_msg+0xd1/0x180
    [<0000000040543d12>] netlink_rcv_skb+0x152/0x3c0
    [<00000000efc4eae8>] genl_rcv+0x2d/0x40
    [<00000000ea645603>] netlink_unicast+0x52f/0x740
    [<00000000641fca1a>] netlink_sendmsg+0x9c7/0xf50
    [<00000000fed4a4b8>] sock_sendmsg+0xbe/0x120
    [<00000000d85795a9>] __sys_sendto+0x397/0x620
    [<00000000c5f84622>] __x64_sys_sendto+0xe6/0x1a0

Fixes: 6e6030bd ("mlxsw: spectrum_nve: Implement common NVE core")
Signed-off-by: Ido Schimmel <idosch@mellanox.com>
Reviewed-by: Petr Machata <petrm@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

After a packet was decapsulated it is classified to the relevant FID
based on its VNI and undergoes L2 forwarding.

Unlike regular (non-encapsulated) ARP packets, Spectrum does not trap
decapsulated ARP packets during L2 forwarding and instead can only trap
such packets in the underlay router during decapsulation.

Add this missing packet trap, which is required for VXLAN routing when
the MAC of the target host is not known.

Fixes: b02597d5 ("mlxsw: spectrum: Add NVE packet traps")
Signed-off-by: Ido Schimmel <idosch@mellanox.com>
Reviewed-by: Petr Machata <petrm@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

During the firmware flash process, some of the EMADs get timed out, which
causes the driver to send them again with a limit of 5 retries. There are
some situations in which 5 retries is not enough and the EMAD access fails.
If the failed EMAD was related to the flashing process, the driver fails
the flashing.

The reason for these timeouts during firmware flashing is cache misses in
the CPU running the firmware. In case the CPU needs to fetch instructions
from the flash when a firmware is flashed, it needs to wait for the
flashing to complete. Since flashing takes time, it is possible for pending
EMADs to timeout.

Fix by increasing EMADs' timeout while flashing firmware.

Fixes: ce6ef68f ("mlxsw: spectrum: Implement the ethtool flash_device callback")
Signed-off-by: Shalom Toledo <shalomt@mellanox.com>
Signed-off-by: Ido Schimmel <idosch@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

Currently the ethtool_regs version is set to 0 for all DSA drivers.

Use this field to store the chip ID to simplify the pretty dump of
any interfaces registered by the "dsa" driver.
Signed-off-by: Vivien Didelot <vivien.didelot@gmail.com>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

Willem de Bruijn says:

====================
net: SO_TIMESTAMPING fixes

Fix two omissions:

- tx timestamping is missing for AF_INET6/SOCK_RAW/IPPROTO_RAW
- SOF_TIMESTAMPING_OPT_ID is missing for IPPROTO_RAW, PF_PACKET, CAN

Discovered while expanding the selftest in

  tools/testing/selftests/networking/timestamping/txtimestamp.c

Will send the test patchset to net-next once the fixes make it to that
branch. For now, it is available at

  https://github.com/wdebruij/linux/commits/txtimestamp-test-1
====================
Signed-off-by: David S. Miller <davem@davemloft.net>

SOF_TIMESTAMPING_OPT_ID is supported on TCP, UDP and RAW sockets.
But it was missing on RAW with IPPROTO_IP, PF_PACKET and CAN.

Add skb_setup_tx_timestamp that configures both tx_flags and tskey
for these paths that do not need corking or use bytestream keys.

Fixes: 09c2d251 ("net-timestamp: add key to disambiguate concurrent datagrams")
Signed-off-by: Willem de Bruijn <willemb@google.com>
Acked-by: Soheil Hassas Yeganeh <soheil@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

Raw sockets support tx timestamping, but one case is missing.

IPPROTO_RAW takes a separate packet construction path. raw_send_hdrinc
has an explicit call to sock_tx_timestamp, but rawv6_send_hdrinc does
not. Add it.

Fixes: 11878b40 ("net-timestamp: SOCK_RAW and PING timestamping")
Signed-off-by: Willem de Bruijn <willemb@google.com>
Acked-by: Soheil Hassas Yeganeh <soheil@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

Make my Gmail address the primary one from now on.
Signed-off-by: Vivien Didelot <vivien.didelot@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

Recent changes in the mvneta driver reworked allocation
and handling of the ingress buffers to use entire pages.
Apart from that in SW BM scenario the HW must be informed
via PRXDQS about the biggest possible incoming buffer
that can be propagated by RX descriptors.

The BufferSize field was filled according to the MTU-dependent
pkt_size value. Later change to PAGE_SIZE broke RX operation
when usin 64K pages, as the field is simply too small.

This patch conditionally limits the value passed to the BufferSize
of the PRXDQS register, depending on the PAGE_SIZE used.
On the occasion remove now unused frag_size field of the mvneta_port
structure.

Fixes: 562e2f46 ("net: mvneta: Improve the buffer allocation method for SWBM")
Signed-off-by: Marcin Wojtas <mw@semihalf.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

Peng Li says:

====================
net: hns: Code improvements & fixes for HNS driver

This patchset introduces some code improvements and fixes
for the identified problems in the HNS driver.

Every patch is independent.
====================
Signed-off-by: David S. Miller <davem@davemloft.net>

Create a net bridge, add eth and vnet to the bridge. The vnet is used
by a virtual machine. When ping the virtual machine from the outside
host and the virtual machine send multicast at the same time, the ping
package will lost.

The multicast package send to the eth, eth will send it to the bridge too,
and the bridge learn the mac of eth. When outside host ping the virtual
mechine, it will match the promisc entry of the eth which is not expected,
and the bridge send it to eth not to vnet, cause ping lost.

So this patch change promisc tcam entry position to the END of 512 tcam
entries, which indicate lower priority. And separate one promisc entry to
two: mc & uc, to avoid package match the wrong tcam entry.
Signed-off-by: Yonglong Liu <liuyonglong@huawei.com>
Signed-off-by: Peng Li <lipeng321@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

In some case, when mac enable|disable and adjust link, may cause hard to
link(or abnormal) between mac and phy. This patch adds the code for rx PCS
to avoid this bug.

Disable the rx PCS when driver disable the gmac, and enable the rx PCS
when driver enable the mac.
Signed-off-by: Yonglong Liu <liuyonglong@huawei.com>
Signed-off-by: Peng Li <lipeng321@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

The ntuple-filters features is forced on by chip.
But it shows "ntuple-filters: off [fixed]" when use ethtool.
This patch make it correct with "ntuple-filters: on [fixed]".
Signed-off-by: Yonglong Liu <liuyonglong@huawei.com>
Signed-off-by: Peng Li <lipeng321@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

There will be a large number of MAC pause frames on the net,
which caused tx timeout of net device. And then the net device
was reset to try to recover it. So that is not useful, and will
cause some other problems.

So need doubled ndev->watchdog_timeo if device watchdog occurred
until watchdog_timeo up to 40s and then try resetting to recover
it.

When collecting dfx information such as hardware registers when tx timeout.
Some registers for count were cleared when read. So need move this task
before update net state which also read the count registers.
Signed-off-by: Yonglong Liu <liuyonglong@huawei.com>
Signed-off-by: Peng Li <lipeng321@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1.In "hns_nic_init_irq", if request irq fail at index i,
  the function return directly without releasing irq resources
  that already requested.

2.In "hns_nic_net_up" after "hns_nic_init_irq",
  if exceptional branch occurs, irqs that already requested
  are not release.
Signed-off-by: Yonglong Liu <liuyonglong@huawei.com>
Signed-off-by: Peng Li <lipeng321@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

If there are packets in hardware when changing the speed or duplex,
it may cause hardware hang up.

This patch adds the code to wait rx fbd clean up when ae stopped.
Signed-off-by: Yonglong Liu <liuyonglong@huawei.com>
Signed-off-by: Peng Li <lipeng321@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

After resetting dsaf to try to repair chip error such as ecc error,
the net device will be open if net interface is up. But at this time
if there is the users set the net device up with the command ifconfig,
the net device will be opened twice consecutively.

Function napi_enable was called when open device. And Kernel panic will
be occurred if it was called twice consecutively. Such as follow:
static inline void napi_enable(struct napi_struct *n)
{
         BUG_ON(!test_bit(NAPI_STATE_SCHED, &n->state));
         smp_mb__before_clear_bit();
         clear_bit(NAPI_STATE_SCHED, &n->state);
}

[37255.571996] Kernel panic - not syncing: BUG!
[37255.595234] Call trace:
[37255.597694] [<ffff80000008ab48>] dump_backtrace+0x0/0x1a0
[37255.603114] [<ffff80000008ad08>] show_stack+0x20/0x28
[37255.608187] [<ffff8000009c4944>] dump_stack+0x98/0xb8
[37255.613258] [<ffff8000009c149c>] panic+0x10c/0x26c
[37255.618070] [<ffff80000070f134>] hns_nic_net_up+0x30c/0x4e0
[37255.623664] [<ffff80000070f39c>] hns_nic_net_open+0x94/0x12c
[37255.629346] [<ffff80000084be78>] __dev_open+0xf4/0x168
[37255.634504] [<ffff80000084c1ac>] __dev_change_flags+0x98/0x15c
[37255.640359] [<ffff80000084c29c>] dev_change_flags+0x2c/0x68
[37255.769580] [<ffff8000008dc400>] devinet_ioctl+0x650/0x704
[37255.775086] [<ffff8000008ddc38>] inet_ioctl+0x98/0xb4
[37255.780159] [<ffff800000827b7c>] sock_do_ioctl+0x44/0x84
[37255.785490] [<ffff800000828e04>] sock_ioctl+0x248/0x30c
[37255.790737] [<ffff80000026dc6c>] do_vfs_ioctl+0x480/0x618
[37255.796156] [<ffff80000026de94>] SyS_ioctl+0x90/0xa4
[37255.801139] SMP: stopping secondary CPUs
[37255.805079] kbox: catch panic event.
[37255.809586] collected_len = 128928, LOG_BUF_LEN_LOCAL = 131072
[37255.816103] flush cache 0xffff80003f000000  size 0x800000
[37255.822192] flush cache 0xffff80003f000000  size 0x800000
[37255.828289] flush cache 0xffff80003f000000  size 0x800000
[37255.834378] kbox: no notify die func register. no need to notify
[37255.840413] ---[ end Kernel panic - not syncing: BUG!

This patchset fix this bug according to the flag NIC_STATE_DOWN.
Signed-off-by: Yonglong Liu <liuyonglong@huawei.com>
Signed-off-by: Peng Li <lipeng321@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

According to the hip06 datasheet:
1.Six registers use wrong address:
  RCB_COM_SF_CFG_INTMASK_RING
  RCB_COM_SF_CFG_RING_STS
  RCB_COM_SF_CFG_RING
  RCB_COM_SF_CFG_INTMASK_BD
  RCB_COM_SF_CFG_BD_RINT_STS
  DSAF_INODE_VC1_IN_PKT_NUM_0_REG
2.The offset of DSAF_INODE_VC1_IN_PKT_NUM_0_REG should be
  0x103C + 0x80 * all_chn_num
3.The offset to show the value of DSAF_INODE_IN_DATA_STP_DISC_0_REG
  is wrong, so the value of DSAF_INODE_SW_VLAN_TAG_DISC_0_REG will be
  overwrite

These registers are only used in "ethtool -d", so that did not cause ndev
to misfunction.
Signed-off-by: Yonglong Liu <liuyonglong@huawei.com>
Signed-off-by: Peng Li <lipeng321@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

There are two test cases:
1. Remove the 4 modules:hns_enet_drv/hns_dsaf/hnae/hns_mdio,
   and install them again, must use "ifconfig down/ifconfig up"
   command pair to bring port to work.

   This patch calls phy_stop function when init phy to fix this bug.

2. Remove the 2 modules:hns_enet_drv/hns_dsaf, and install them again,
   all ports can not use anymore, because of the phy devices register
   failed(phy devices already exists).

   Phy devices are registered when hns_dsaf installed, this patch
   removes them when hns_dsaf removed.

The two cases are sometimes related, fixing the second case also requires
fixing the first case, so fix them together.
Signed-off-by: Yonglong Liu <liuyonglong@huawei.com>
Signed-off-by: Peng Li <lipeng321@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

According to the hip06 Datasheet:
1. The offset of INGRESS_SW_VLAN_TAG_DISC should be 0x1A00+4*all_chn_num
2. The offset of INGRESS_IN_DATA_STP_DISC should be 0x1A50+4*all_chn_num
Signed-off-by: Yonglong Liu <liuyonglong@huawei.com>
Signed-off-by: Peng Li <lipeng321@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

Sergey reported that forwarding was no longer working
if fq packet scheduler was used.

This is caused by the recent switch to EDT model, since incoming
packets might have been timestamped by __net_timestamp()

__net_timestamp() uses ktime_get_real(), while fq expects packets
using CLOCK_MONOTONIC base.

The fix is to clear skb->tstamp in forwarding paths.

Fixes: 80b14dee ("net: Add a new socket option for a future transmit time.")
Fixes: fb420d5d ("tcp/fq: move back to CLOCK_MONOTONIC")
Signed-off-by: Eric Dumazet <edumazet@google.com>
Reported-by: Sergey Matyukevich <geomatsi@gmail.com>
Tested-by: Sergey Matyukevich <geomatsi@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

Signed-off-by: Robert P. J. Day <rpjday@crashcourse.ca>
Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

Since commit 7969e5c4 ("ip: discard IPv4 datagrams with overlapping
segments.") IPv4 reassembly code drops the whole queue whenever an
overlapping fragment is received. However, the test is written in a way
which detects duplicate fragments as overlapping so that in environments
with many duplicate packets, fragmented packets may be undeliverable.

Add an extra test and for (potentially) duplicate fragment, only drop the
new fragment rather than the whole queue. Only starting offset and length
are checked, not the contents of the fragments as that would be too
expensive. For similar reason, linear list ("run") of a rbtree node is not
iterated, we only check if the new fragment is a subset of the interval
covered by existing consecutive fragments.

v2: instead of an exact check iterating through linear list of an rbtree
node, only check if the new fragment is subset of the "run" (suggested
by Eric Dumazet)

Fixes: 7969e5c4 ("ip: discard IPv4 datagrams with overlapping segments.")
Signed-off-by: Michal Kubecek <mkubecek@suse.cz>
Signed-off-by: David S. Miller <davem@davemloft.net>

Added support for the Telit LN940 series cellular modules QMI interface.
QMI_QUIRK_SET_DTR quirk requied for Qualcomm MDM9x40 chipset.
Signed-off-by: Jörgen Storvist <jorgen.storvist@gmail.com>
Acked-by: Bjørn Mork <bjorn@mork.no>
Signed-off-by: David S. Miller <davem@davemloft.net>

Added support for Fibocom NL668 series QMI interface.
Using QMI_QUIRK_SET_DTR required for Qualcomm MDM9x07 chipsets.
Signed-off-by: Jörgen Storvist <jorgen.storvist@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

Alexei Starovoitov says:

====================
pull-request: bpf 2018-12-15

The following pull-request contains BPF updates for your *net* tree.

The main changes are:

1) fix liveness propagation of callee saved registers, from Jakub.

2) fix overflow in bpf_jit_limit knob, from Daniel.

3) bpf_flow_dissector api fix, from Stanislav.

4) bpf_perf_event api fix on powerpc, from Sandipan.
====================
Signed-off-by: David S. Miller <davem@davemloft.net>

tipc_wait_for_cond() drops socket lock before going to sleep,
but tsk->group could be freed right after that release_sock().
So we have to re-check and reload tsk->group after it wakes up.

After this patch, tipc_wait_for_cond() returns -ERESTARTSYS when
tsk->group is NULL, instead of continuing with the assumption of
a non-NULL tsk->group.

(It looks like 'dsts' should be re-checked and reloaded too, but
it is a different bug.)

Similar for tipc_send_group_unicast() and tipc_send_group_anycast().

Reported-by: syzbot+10a9db47c3a0e13eb31c@syzkaller.appspotmail.com
Fixes: b7d42635 ("tipc: introduce flow control for group broadcast messages")
Fixes: ee106d7f ("tipc: introduce group anycast messaging")
Fixes: 27bd9ec0 ("tipc: introduce group unicast messaging")
Cc: Ying Xue <ying.xue@windriver.com>
Cc: Jon Maloy <jon.maloy@ericsson.com>
Signed-off-by: Cong Wang <xiyou.wangcong@gmail.com>
Acked-by: Ying Xue <ying.xue@windriver.com>
Signed-off-by: David S. Miller <davem@davemloft.net>