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Currently pedit tries to ensure that the accessed skb offset
is writable via skb_unclone(). The action potentially allows
touching any skb bytes, so it may end-up modifying shared data.
The above causes some sporadic MPTCP self-test failures, due to
this code:
tc -n $ns2 filter add dev ns2eth$i egress \
protocol ip prio 1000 \
handle 42 fw \
action pedit munge offset 148 u8 invert \
pipe csum tcp \
index 100
The above modifies a data byte outside the skb head and the skb is
a cloned one, carrying a TCP output packet.
This change addresses the issue by keeping track of a rough
over-estimate highest skb offset accessed by the action and ensuring
such offset is really writable.
Note that this may cause performance regressions in some scenarios,
but hopefully pedit is not in the critical path.
Fixes: db2c24175d14 ("act_pedit: access skb->data safely")
Acked-by: Mat Martineau <mathew.j.martineau@linux.intel.com>
Tested-by: Geliang Tang <geliang.tang@suse.com>
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
Acked-by: Jamal Hadi Salim <jhs@mojatatu.com>
Link: https://lore.kernel.org/r/1fcf78e6679d0a287dd61bb0f04730ce33b3255d.1652194627.git.pabeni@redhat.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
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Looks like all the changes to this driver had been tree-wide
refactoring since git era begun. The driver is using virt_to_bus()
we should make it use more modern DMA APIs but since it's unlikely
to be getting any use these days delete it instead. We can always
revert to bring it back.
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Looks like all the changes to this driver had been tree-wide
refactoring since git era begun. The driver is using virt_to_bus()
we should make it use more modern DMA APIs but since it's unlikely
to be getting any use these days delete it instead. We can always
revert to bring it back.
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Acked-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Eric Dumazet says:
====================
net: CONFIG_DEBUG_NET and friends
This patch series is inspired by some syzbot reports
hinting that skb transport_header might be not set
in places we expect it being set.
Add a new CONFIG_DEBUG_NET option
and DEBUG_NET_WARN_ON_ONCE() helper, so that we can start
adding more sanity checks in the future.
Replace two BUG() in skb_checksum_help()
with less risky code.
v2: make first patch compile on more arches/compilers
add the 5th patch to add more debugging in skb_checksum_help()
====================
Signed-off-by: David S. Miller <davem@davemloft.net>
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This is a followup of previous patch.
Dumping the stack trace is a good start, but printing
basic skb information is probably better.
Signed-off-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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I have a syzbot report that managed to get a crash in skb_checksum_help()
If syzbot can trigger these BUG(), it makes sense to replace
them with more friendly WARN_ON_ONCE() since skb_checksum_help()
can instead return an error code.
Note that syzbot will still crash there, until real bug is fixed.
Signed-off-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Make sure skb_transport_header() and skb_transport_offset() uses
are not fooled if the transport header has not been set.
This change will likely expose existing bugs in linux networking stacks.
Signed-off-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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This config option enables network debugging checks.
This patch adds DEBUG_NET_WARN_ON_ONCE(cond)
Note that this is not a replacement for WARN_ON_ONCE(cond)
as (cond) is not evaluated if CONFIG_DEBUG_NET is not set.
Signed-off-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Remove from include/linux/netdevice.h helpers
that send debug/info/warnings to syslog.
We plan adding more helpers in following patches.
v2: added two includes, and 'struct net_device' forward declaration
to avoid compile errors (kernel bots)
Signed-off-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Alexandra Winter says:
====================
s390/net: Cleanup some code checker findings
clean up smatch findings in legacy code. I was not able to provoke
any real failures on my systems, but other hardware reactions,
timing conditions or compiler output, may cause failures.
There are still 2 smatch warnings left in s390/net:
drivers/s390/net/ctcm_main.c:1326 add_channel() warn: missing error code 'rc'
This one is a false positive.
drivers/s390/net/netiucv.c:1355 netiucv_check_user() warn: argument 3 to %02x specifier has type 'char'
Postponing this one, need to better understand string handling in iucv.
There are several sparse warnings left in ctcm, like:
drivers/s390/net/ctcm_fsms.c:573:9: warning: context imbalance in 'ctcm_chx_setmode' - different lock contexts for basic block
Those are mentioned in the source, no plan to rework.
====================
Signed-off-by: David S. Miller <davem@davemloft.net>
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smatch complains about
drivers/s390/net/lcs.c:1741 lcs_get_control() warn: variable dereferenced before check 'card->dev' (see line 1739)
Fixes: 27eb5ac8f015 ("[PATCH] s390: lcs driver bug fixes and improvements [1/2]")
Signed-off-by: Alexandra Winter <wintera@linux.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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smatch complains about
drivers/s390/net/ctcm_mpc.c:1210 ctcmpc_unpack_skb() warn: possible memory leak of 'mpcginfo'
mpc_action_discontact() did not free mpcginfo. Consolidate the freeing in
ctcmpc_unpack_skb().
Fixes: 293d984f0e36 ("ctcm: infrastructure for replaced ctc driver")
Signed-off-by: Alexandra Winter <wintera@linux.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Found by cppcheck and smatch.
smatch complains about
drivers/s390/net/ctcm_sysfs.c:43 ctcm_buffer_write() warn: variable dereferenced before check 'priv' (see line 42)
Fixes: 3c09e2647b5e ("ctcm: rename READ/WRITE defines to avoid redefinitions")
Reported-by: Colin Ian King <colin.i.king@gmail.com>
Signed-off-by: Alexandra Winter <wintera@linux.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Grant Grundler says:
====================
net: atlantic: more fuzzing fixes
It essentially describes four problems:
1) validate rxd_wb->next_desc_ptr before populating buff->next
2) "frag[0] not initialized" case in aq_ring_rx_clean()
3) limit iterations handling fragments in aq_ring_rx_clean()
4) validate hw_head_ in hw_atl_b0_hw_ring_tx_head_update()
(1) was fixed by Zekun Shen <bruceshenzk@gmail.com> around the same time with
"atlantic: Fix buff_ring OOB in aq_ring_rx_clean" (SHA1 5f50153288452e10).
I've added one "clean up" contribution:
"net: atlantic: reduce scope of is_rsc_complete"
I tested the "original" patches using chromeos-v5.4 kernel branch:
https://chromium-review.googlesource.com/q/hashtag:pcinet-atlantic-2022q1+(status:open%20OR%20status:merged)
I've forward ported those patches to 5.18-rc2 and compiled them but am
unable to test them on 5.18-rc2 kernel (logistics problems).
Credit largely goes to ChromeOS Fuzzing team members:
Aashay Shringarpure, Yi Chou, Shervin Oloumi
V2 changes:
o drop first patch - was already fixed upstream differently
o reduce (4) "validate hw_head_" to simple bounds checking.
====================
Signed-off-by: David S. Miller <davem@davemloft.net>
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Bounds check hw_head index provided by NIC to verify it lies
within the TX buffer ring.
Reported-by: Aashay Shringarpure <aashay@google.com>
Reported-by: Yi Chou <yich@google.com>
Reported-by: Shervin Oloumi <enlightened@google.com>
Signed-off-by: Grant Grundler <grundler@chromium.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Enforce that the CPU can not get stuck in an infinite loop.
Reported-by: Aashay Shringarpure <aashay@google.com>
Reported-by: Yi Chou <yich@google.com>
Reported-by: Shervin Oloumi <enlightened@google.com>
Signed-off-by: Grant Grundler <grundler@chromium.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Don't defer handling the err case outside the loop. That's pointless.
And since is_rsc_complete is only used inside this loop, declare
it inside the loop to reduce it's scope.
Signed-off-by: Grant Grundler <grundler@chromium.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
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In aq_ring_rx_clean(), if buff->is_eop is not set AND
buff->len < AQ_CFG_RX_HDR_SIZE, then hdr_len remains equal to
buff->len and skb_add_rx_frag(xxx, *0*, ...) is not called.
The loop following this code starts calling skb_add_rx_frag() starting
with i=1 and thus frag[0] is never initialized. Since i is initialized
to zero at the top of the primary loop, we can just reference and
post-increment i instead of hardcoding the 0 when calling
skb_add_rx_frag() the first time.
Reported-by: Aashay Shringarpure <aashay@google.com>
Reported-by: Yi Chou <yich@google.com>
Reported-by: Shervin Oloumi <enlightened@google.com>
Signed-off-by: Grant Grundler <grundler@chromium.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
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git://git.kernel.org/pub/scm/linux/kernel/git/saeed/linux
Saeed Mahameed says:
====================
mlx5-updates-2022-05-09
1) Gavin Li, adds exit route from waiting for FW init on device boot and
increases FW init timeout on health recovery flow
2) Support 4 ports HCAs LAG mode
Mark Bloch Says:
================
This series adds to mlx5 drivers support for 4 ports HCAs.
Starting with ConnectX-7 HCAs with 4 ports are possible.
As most driver parts aren't affected by such configuration most driver
code is unchanged.
Specially the only affected areas are:
- Lag
- Devcom
- Merged E-Switch
- Single FDB E-Switch
Lag was chosen to be converted first. Creating hardware LAG when all 4
ports are added to the same bond device.
Devom, merge E-Switch and single FDB E-Switch, are marked as supporting
only 2 ports HCAs and future patches will add support for 4 ports HCAs.
In order to activate the hardware lag a user can execute the:
ip link add bond0 type bond
ip link set bond0 type bond miimon 100 mode 2
ip link set eth2 master bond0
ip link set eth3 master bond0
ip link set eth4 master bond0
ip link set eth5 master bond0
Where eth2, eth3, eth4 and eth5 are the PFs of the same HCA.
================
====================
Signed-off-by: David S. Miller <davem@davemloft.net>
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Switch to using pcim_enable_device() to avoid missing pci_disable_device().
Reported-by: Hulk Robot <hulkci@huawei.com>
Signed-off-by: Yang Yingliang <yangyingliang@huawei.com>
Link: https://lore.kernel.org/r/20220510031316.1780409-1-yangyingliang@huawei.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
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Yuiko Oshino says:
====================
net: phy: add comments for LAN8742 phy support
Add comments for 0xfffffff2 phy ID mask for the LAN8742 and the LAN88xx, explaining that they can coexist and allow future hardware revisions.
Also add one missing tab in smsc.c.
====================
Link: https://lore.kernel.org/r/20220509185804.7147-1-yuiko.oshino@microchip.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
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add comments for the LAN8742 phy ID mask in the previous patch.
add one missing tab in the LAN8742 phy ID line.
Signed-off-by: Yuiko Oshino <yuiko.oshino@microchip.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
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add comments for the updated LAN88xx phy ID mask in the previous patch.
Signed-off-by: Yuiko Oshino <yuiko.oshino@microchip.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
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Convert the marvell,orion-mdio binding to JSON schema.
Signed-off-by: Chris Packham <chris.packham@alliedtelesis.co.nz>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Link: https://lore.kernel.org/r/20220505210621.3637268-1-chris.packham@alliedtelesis.co.nz
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
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Jakub Kicinski says:
====================
docs: document some aspects of struct sk_buff
This small set creates a place to render sk_buff documentation,
documents one random thing (data-only skbs) and converts the big
checksum comment to kdoc.
====================
Link: https://lore.kernel.org/r/20220323233715.2104106-1-kuba@kernel.org/
Link: https://lore.kernel.org/r/20220324231312.2241166-1-kuba@kernel.org/
Link: https://lore.kernel.org/r/20220509160456.1058940-1-kuba@kernel.org
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
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Long time ago Tom added a giant comment to skbuff.h explaining
checksums. Now that we have a place in Documentation for skbuff
docs we should render it. Sprinkle some markup while at it.
Reviewed-by: David Ahern <dsahern@kernel.org>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
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The comment about shinfo->dataref split is really unhelpful,
at least to me. Rewrite it and render it to skb documentation.
Reviewed-by: David Ahern <dsahern@kernel.org>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
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Add basic skb documentation. It's mostly an intro to the subsequent
patches - it would looks strange if we documented advanced topics
without covering the basics in any way.
Reviewed-by: David Ahern <dsahern@kernel.org>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
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Commit c526fd8f9f4f21 ("net: inline dev_queue_xmit()") exported
__dev_queue_xmit(), now it's being rendered in html docs, triggering:
Documentation/networking/kapi:92: net/core/dev.c:4101: WARNING: Missing matching underline for section title overline.
Reported-by: Stephen Rothwell <sfr@canb.auug.org.au>
Link: https://lore.kernel.org/linux-next/20220503073420.6d3f135d@canb.auug.org.au/
Fixes: c526fd8f9f4f21 ("net: inline dev_queue_xmit()")
Link: https://lore.kernel.org/r/20220509170412.1069190-1-kuba@kernel.org
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
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Martin Habets says:
====================
Move Siena into a separate subdirectory
The Siena NICs (SFN5000 and SFN6000 series) went EOL in November 2021.
Most of these adapters have been remove from our test labs, and testing
has been reduced to a minimum.
This patch series creates a separate kernel module for the Siena architecture,
analogous to what was done for Falcon some years ago.
This reduces our maintenance for the sfc.ko module, and allows us to
enhance the EF10 and EF100 drivers without the risk of breaking Siena NICs.
After this series further enhancements are needed to differentiate the
new kernel module from sfc.ko, and the Siena code can be removed from sfc.ko.
Thes will be posted as a small follow-up series.
The Siena module is not built by default, but can be enabled
using Kconfig option SFC_SIENA. This will create module sfc-siena.ko.
Patches
Patches 1-3 establish the code base for the Siena driver.
Patches 4-10 ensure the allyesconfig build succeeds.
Patch 11 adds the basic Siena module.
I do not expect patch 1 through 3 to be reviewed, they are FYI only.
No checkpatch issues were resolved as part of these, but they
were fixed in the subsequent patches.
Testing
Various build tests were done such as allyesconfig, W=1 and sparse.
The new sfc-siena.ko and sfc.ko modules were tested on a machine with both
these NICs in them, and several tests were run on both drivers.
====================
Link: https://lore.kernel.org/r/165211018297.5289.9658523545298485394.stgit@palantir17.mph.net
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
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Make the (un)load message more specific to differentiate it from
the sfc.ko messages.
Signed-off-by: Martin Habets <habetsm.xilinx@gmail.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
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The implementation of each is quite short. This means sriov.c is
not needed any more.
Signed-off-by: Martin Habets <habetsm.xilinx@gmail.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
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For siena use efx_siena_ as the function prefix.
efx_nic_update_stats_atomic is only used in efx_common.c, so move
it there.
efx_nic_copy_stats is not used in Siena, so it is removed.
Signed-off-by: Martin Habets <habetsm.xilinx@gmail.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
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For siena use efx_siena_ as the function prefix.
Several functions are not used in Siena, so they are removed.
Signed-off-by: Martin Habets <habetsm.xilinx@gmail.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
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For siena use efx_siena_ as the function prefix.
This patch covers selftest.h, ptp.h, net_driver.h and ethtool_common.h.
efx_ethtool_fill_self_tests() can become static.
Some functions in ptp.c can also become static.
Rename loopback_mode in net_driver.h.
Signed-off-by: Martin Habets <habetsm.xilinx@gmail.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
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For siena use efx_siena_ as the function prefix.
Several functions are not used in Siena, so they are removed.
Use a Siena specific variable name for module parameter
efx_separate_tx_channels.
Move efx_fini_tx_queue() to avoid a forward declaration of
efx_dequeue_buffer().
Signed-off-by: Martin Habets <habetsm.xilinx@gmail.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
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When building with allyesconfig there are many identical
symbol names.
For siena use efx_siena_ as the function and variable prefix
to avoid build errors.
efx_mtd_remove_partition can become static as it is no longer called
from other files.
efx_ticks_to_usecs and efx_xmit_done_single are not used in Siena, so
they are removed.
Several functions are only used inside efx_channels.c for Siena so
they can become static.
Signed-off-by: Martin Habets <habetsm.xilinx@gmail.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
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Functionality not supported or needed on Siena includes:
- Anything for EF100
- EF10 specifics such as register access, PIO and TSO offload.
Also only bind to Siena NICs.
Remove EF10 specifics from nic.h.
The functions that start with efx_farch_ will be removed from sfc.ko
with a subsequent patch.
Add the efx_ prefix to siena_prepare_flush() to make it consistent
with the other APIs.
Signed-off-by: Martin Habets <habetsm.xilinx@gmail.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
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These are the files starting with m through w.
No changes are done, those will be done with subsequent commits.
Signed-off-by: Martin Habets <habetsm.xilinx@gmail.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
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These are the files starting with b through i.
No changes are done, those will be done with subsequent commits.
Signed-off-by: Martin Habets <habetsm.xilinx@gmail.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
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Files are only moved, no changes are made.
Signed-off-by: Martin Habets <habetsm.xilinx@gmail.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
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In lanphy_read_page_reg, calling __phy_read() might return a negative
error code. Use 'int' to check the error code.
Fixes: 7c2dcfa295b1 ("net: phy: micrel: Add support for LAN8804 PHY")
Signed-off-by: Wan Jiabing <wanjiabing@vivo.com>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Link: https://lore.kernel.org/r/20220509144519.2343399-1-wanjiabing@vivo.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
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Kernel test robot reported an issue after a recent patch about an
unused variable when CONFIG_IPV6 is disabled. Move the variable
declaration to be inside the #ifdef, and do a bit more cleanup. There
is no need to use a temporary ipv6 bool value, it is just checked once,
remove the extra variable and just do the check directly.
Fixes: 9d5447ed44b5 ("nfp: flower: fixup ipv6/ipv4 route lookup for neigh events")
Reported-by: kernel test robot <lkp@intel.com>
Signed-off-by: Louis Peens <louis.peens@corigine.com>
Signed-off-by: Simon Horman <simon.horman@corigine.com>
Link: https://lore.kernel.org/r/20220510074845.41457-1-simon.horman@corigine.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
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The 'igc_check_downshift' method always returns 0; there is no need
for a return value so change the type of this method to void.
Signed-off-by: Sasha Neftin <sasha.neftin@intel.com>
Tested-by: Naama Meir <naamax.meir@linux.intel.com>
Signed-off-by: Tony Nguyen <anthony.l.nguyen@intel.com>
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Complete to commit 8e153faf5827 ("igc: Remove unused phy type")
i225 parts have only one PHY. There is no point to use phy_type enum.
Clean up the code accordingly, and get rid of the unused enum lines.
Signed-off-by: Sasha Neftin <sasha.neftin@intel.com>
Tested-by: Naama Meir <naamax.meir@linux.intel.com>
Signed-off-by: Tony Nguyen <anthony.l.nguyen@intel.com>
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igc_set_spd_dplx method is not used. This patch comes to tidy up
the driver code.
Reported-by: Muhammad Husaini Zulkifli <muhammad.husaini.zulkifli@intel.com>
Signed-off-by: Sasha Neftin <sasha.neftin@intel.com>
Tested-by: Naama Meir <naamax.meir@linux.intel.com>
Signed-off-by: Tony Nguyen <anthony.l.nguyen@intel.com>
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Pull virtio fix from Michael Tsirkin:
"A last minute fixup of the transitional ID numbers.
Important to get these right - if users start to depend on the wrong
ones they are very hard to fix"
* tag 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mst/vhost:
virtio: fix virtio transitional ids
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udf_write_fi() uses lengthOfImpUse of the entry it is writing to.
However this field has not yet been initialized so it either contains
completely bogus value or value from last directory entry at that place.
In either case this is wrong and can lead to filesystem corruption or
kernel crashes.
Reported-by: butt3rflyh4ck <butterflyhuangxx@gmail.com>
CC: stable@vger.kernel.org
Fixes: 979a6e28dd96 ("udf: Get rid of 0-length arrays in struct fileIdentDesc")
Signed-off-by: Jan Kara <jack@suse.cz>
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This commit fixes the transitional PCI device ID.
Fixes: d61914ea6ada ("virtio: update virtio id table, add transitional ids")
Signed-off-by: Shunsuke Mie <mie@igel.co.jp>
Link: https://lore.kernel.org/r/20220510102723.87666-1-mie@igel.co.jp
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
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Clang's structure layout randomization feature gets upset when it sees
struct neighbor (which is randomized) cast to struct dn_neigh:
net/decnet/dn_route.c:1123:15: error: casting from randomized structure pointer type 'struct neighbour *' to 'struct dn_neigh *'
gateway = ((struct dn_neigh *)neigh)->addr;
^
Update all the open-coded casts to use container_of() to do the conversion
instead of depending on strict member ordering.
Reported-by: kernel test robot <lkp@intel.com>
Link: https://lore.kernel.org/lkml/202205041247.WKBEHGS5-lkp@intel.com
Cc: "David S. Miller" <davem@davemloft.net>
Cc: Jakub Kicinski <kuba@kernel.org>
Cc: Paolo Abeni <pabeni@redhat.com>
Cc: Yajun Deng <yajun.deng@linux.dev>
Cc: Zheng Yongjun <zhengyongjun3@huawei.com>
Cc: Bill Wendling <morbo@google.com>
Cc: linux-decnet-user@lists.sourceforge.net
Cc: netdev@vger.kernel.org
Signed-off-by: Kees Cook <keescook@chromium.org>
Link: https://lore.kernel.org/r/20220508102217.2647184-1-keescook@chromium.org
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
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