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Since commit ce098da1497c ("skbuff: Introduce slab_build_skb()")
drivers trying to build skb around slab-backed buffers should
go via slab_build_skb() rather than passing frag_size = 0 to
the main build_skb().
Remove the copy'n'pasted comments about 0 meaning slab.
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
The blamed commit implemented the vcap_operations to allow to add an
entry in the TCAM. One of the callbacks is to validate the supported
keysets. If the TCAM lookup was not enabled, then this will return
failure so no entries could be added.
This doesn't make much sense, as you can enable at a later point the
TCAM. Therefore change it such to allow entries in TCAM even it is not
enabled.
Fixes: 4426b78c626d ("net: lan966x: Add port keyset config and callback interface")
Signed-off-by: Horatiu Vultur <horatiu.vultur@microchip.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Bjørn Mork says:
====================
r8152: allow firmwares with NCM support
Some device and firmware combinations with NCM support will
end up using the cdc_ncm driver by default. This is sub-
optimal for the same reasons we've previously accepted the
blacklist hack in cdc_ether.
The recent support for subclassing the generic USB device
driver allows us to create a very slim driver with the same
functionality. This patch set uses that to implement a
device specific configuration default which is independent
of any USB interface drivers. This means that it works
equally whether the device initially ends up in NCM or ECM
mode, without depending on any code in the respective class
drivers.
====================
Signed-off-by: David S. Miller <davem@davemloft.net>
The r8152 driver does not need this anymore.
Dropping blacklist entries adds optional support for these
devices in ECM mode.
The 8153 devices are handled by the r8153_ecm driver when
in ECM mode, and must still be blacklisted here.
Signed-off-by: Bjørn Mork <bjorn@mork.no>
Signed-off-by: David S. Miller <davem@davemloft.net>
Subclassing the generic USB device driver to override the
default configuration selection regardless of matching interface
drivers.
The r815x family devices expose a vendor specific function which
the r8152 interface driver wants to handle. This is the preferred
device mode. Additionally one or more USB class functions are
usually supported for hosts lacking a vendor specific driver. The
choice is USB configuration based, with one alternate function per
configuration.
Example device with both NCM and ECM alternate cfgs:
T: Bus=02 Lev=01 Prnt=01 Port=00 Cnt=01 Dev#= 4 Spd=5000 MxCh= 0
D: Ver= 3.20 Cls=00(>ifc ) Sub=00 Prot=00 MxPS= 9 #Cfgs= 3
P: Vendor=0bda ProdID=8156 Rev=31.00
S: Manufacturer=Realtek
S: Product=USB 10/100/1G/2.5G LAN
S: SerialNumber=001000001
C:* #Ifs= 1 Cfg#= 1 Atr=a0 MxPwr=256mA
I:* If#= 0 Alt= 0 #EPs= 3 Cls=ff(vend.) Sub=ff Prot=00 Driver=r8152
E: Ad=81(I) Atr=02(Bulk) MxPS=1024 Ivl=0ms
E: Ad=02(O) Atr=02(Bulk) MxPS=1024 Ivl=0ms
E: Ad=83(I) Atr=03(Int.) MxPS= 2 Ivl=128ms
C: #Ifs= 2 Cfg#= 2 Atr=a0 MxPwr=256mA
I: If#= 0 Alt= 0 #EPs= 1 Cls=02(comm.) Sub=0d Prot=00 Driver=
E: Ad=83(I) Atr=03(Int.) MxPS= 16 Ivl=128ms
I: If#= 1 Alt= 0 #EPs= 0 Cls=0a(data ) Sub=00 Prot=01 Driver=
I: If#= 1 Alt= 1 #EPs= 2 Cls=0a(data ) Sub=00 Prot=01 Driver=
E: Ad=81(I) Atr=02(Bulk) MxPS=1024 Ivl=0ms
E: Ad=02(O) Atr=02(Bulk) MxPS=1024 Ivl=0ms
C: #Ifs= 2 Cfg#= 3 Atr=a0 MxPwr=256mA
I: If#= 0 Alt= 0 #EPs= 1 Cls=02(comm.) Sub=06 Prot=00 Driver=
E: Ad=83(I) Atr=03(Int.) MxPS= 16 Ivl=128ms
I: If#= 1 Alt= 0 #EPs= 0 Cls=0a(data ) Sub=00 Prot=00 Driver=
I: If#= 1 Alt= 1 #EPs= 2 Cls=0a(data ) Sub=00 Prot=00 Driver=
E: Ad=81(I) Atr=02(Bulk) MxPS=1024 Ivl=0ms
E: Ad=02(O) Atr=02(Bulk) MxPS=1024 Ivl=0ms
A problem with this is that Linux will prefer class functions over
vendor specific functions. Using the above example, Linux defaults
to cfg #2, running the device in a sub-optimal NCM mode.
Previously we've attempted to work around the problem by
blacklisting the devices in the ECM class driver "cdc_ether", and
matching on the ECM class function in the vendor specific interface
driver. The latter has been used to switch back to the vendor
specific configuration when the driver is probed for a class
function.
This workaround has several issues;
- class driver blacklists is additional maintanence cruft in an
unrelated driver
- class driver blacklists prevents users from optionally running
the devices in class mode
- each device needs double match entries in the vendor driver
- the initial probing as a class function slows down device
discovery
Now these issues have become even worse with the introduction of
firmware supporting both NCM and ECM, where NCM ends up as the
default mode in Linux. To use the same workaround, we now have
to blacklist the devices in to two different class drivers and
add yet another match entry to the vendor specific driver.
This patch implements an alternative workaround strategy -
independent of the interface drivers. It avoids adding a
blacklist to the cdc_ncm driver and will let us remove the
existing blacklist from the cdc_ether driver.
As an additional bonus, removing the blacklists allow users to
select one of the other device modes if wanted.
Signed-off-by: Bjørn Mork <bjorn@mork.no>
Signed-off-by: David S. Miller <davem@davemloft.net>
Jaroslav reported a recent throughput regression with virtio_net
caused by blamed commit.
It is unclear if DODGY GSO packets coming from user space
can be accepted by GRO engine in the future with minimal
changes, and if there is any expected gain from it.
In the meantime, make sure to detect and flush DODGY packets.
Fixes: 5eddb24901ee ("gro: add support of (hw)gro packets to gro stack")
Signed-off-by: Eric Dumazet <edumazet@google.com>
Reported-and-bisected-by: Jaroslav Pulchart <jaroslav.pulchart@gooddata.com>
Cc: Coco Li <lixiaoyan@google.com>
Cc: Paolo Abeni <pabeni@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Fix a use-after-free that occurs in hcd when in_urb sent from
pn533_usb_send_frame() is completed earlier than out_urb. Its callback
frees the skb data in pn533_send_async_complete() that is used as a
transfer buffer of out_urb. Wait before sending in_urb until the
callback of out_urb is called. To modify the callback of out_urb alone,
separate the complete function of out_urb and ack_urb.
Found by a modified version of syzkaller.
BUG: KASAN: use-after-free in dummy_timer
Call Trace:
memcpy (mm/kasan/shadow.c:65)
dummy_perform_transfer (drivers/usb/gadget/udc/dummy_hcd.c:1352)
transfer (drivers/usb/gadget/udc/dummy_hcd.c:1453)
dummy_timer (drivers/usb/gadget/udc/dummy_hcd.c:1972)
arch_static_branch (arch/x86/include/asm/jump_label.h:27)
static_key_false (include/linux/jump_label.h:207)
timer_expire_exit (include/trace/events/timer.h:127)
call_timer_fn (kernel/time/timer.c:1475)
expire_timers (kernel/time/timer.c:1519)
__run_timers (kernel/time/timer.c:1790)
run_timer_softirq (kernel/time/timer.c:1803)
Fixes: c46ee38620a2 ("NFC: pn533: add NXP pn533 nfc device driver")
Signed-off-by: Minsuk Kang <linuxlovemin@yonsei.ac.kr>
Signed-off-by: David S. Miller <davem@davemloft.net>
Zero-length arrays are deprecated[1]. Replace struct
mlxsw_sp_nexthop_group_info's "nexthops" 0-length array with a flexible
array. Detected with GCC 13, using -fstrict-flex-arrays=3:
drivers/net/ethernet/mellanox/mlxsw/spectrum_router.c: In function 'mlxsw_sp_nexthop_group_hash_obj':
drivers/net/ethernet/mellanox/mlxsw/spectrum_router.c:3278:38: warning: array subscript i is outside array bounds of 'struct mlxsw_sp_nexthop[0]' [-Warray-bounds=]
3278 | val ^= jhash(&nh->ifindex, sizeof(nh->ifindex), seed);
| ^~~~~~~~~~~~
drivers/net/ethernet/mellanox/mlxsw/spectrum_router.c:2954:33: note: while referencing 'nexthops'
2954 | struct mlxsw_sp_nexthop nexthops[0];
| ^~~~~~~~
[1] https://www.kernel.org/doc/html/latest/process/deprecated.html#zero-length-and-one-element-arrays
Cc: Ido Schimmel <idosch@nvidia.com>
Cc: Petr Machata <petrm@nvidia.com>
Cc: "David S. Miller" <davem@davemloft.net>
Cc: Eric Dumazet <edumazet@google.com>
Cc: Jakub Kicinski <kuba@kernel.org>
Cc: Paolo Abeni <pabeni@redhat.com>
Cc: "Gustavo A. R. Silva" <gustavoars@kernel.org>
Cc: netdev@vger.kernel.org
Signed-off-by: Kees Cook <keescook@chromium.org>
Reviewed-by: Ido Schimmel <idosch@nvidia.com>
Reviewed-by: Gustavo A. R. Silva <gustavoars@kernel.org>
Tested-by: Petr Machata <petrm@nvidia.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Mat Martineau says:
====================
mptcp: Protocol in-use tracking and code cleanup
Here's a collection of commits from the MPTCP tree:
Patches 1-4 and 6 contain miscellaneous code cleanup for more consistent
use of helper functions, existing local variables, and better naming.
Patches 5, 7, and 9 add sock_prot_inuse tracking for MPTCP and an
associated self test.
Patch 8 modifies the mptcp_connect self test tool to exit on SIGUSR1
when in "slow mode".
====================
Signed-off-by: David S. Miller <davem@davemloft.net>
Add the function chk_msk_inuse() to diag.sh, which is used to check the
statistics of mptcp socket in use. As mptcp socket in listen state will
be closed randomly after 'accept', we need to get the count of listening
mptcp socket through 'ss' command.
All tests pass.
Acked-by: Paolo Abeni <pabeni@redhat.com>
Signed-off-by: Menglong Dong <imagedong@tencent.com>
Signed-off-by: Mat Martineau <mathew.j.martineau@linux.intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
For now, mptcp_connect won't exit after receiving the 'SIGUSR1' signal
if '-r' is set. Fix this by skipping poll and sleep in copyfd_io_poll()
if 'quit' is set.
Acked-by: Paolo Abeni <pabeni@redhat.com>
Signed-off-by: Menglong Dong <imagedong@tencent.com>
Signed-off-by: Mat Martineau <mathew.j.martineau@linux.intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Do the statistics of mptcp socket in use with sock_prot_inuse_add().
Therefore, we can get the count of used mptcp socket from
/proc/net/protocols:
& cat /proc/net/protocols
protocol size sockets memory press maxhdr slab module cl co di ac io in de sh ss gs se re sp bi br ha uh gp em
MPTCPv6 2048 0 0 no 0 yes kernel y n y y y y y y y y y y n n n y y y n
MPTCP 1896 1 0 no 0 yes kernel y n y y y y y y y y y y n n n y y y n
Acked-by: Paolo Abeni <pabeni@redhat.com>
Signed-off-by: Menglong Dong <imagedong@tencent.com>
Signed-off-by: Mat Martineau <mathew.j.martineau@linux.intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
'ssk' should be more appropriate to be the name of the first argument
in mptcp_token_new_connect().
Acked-by: Paolo Abeni <pabeni@redhat.com>
Signed-off-by: Menglong Dong <imagedong@tencent.com>
Signed-off-by: Mat Martineau <mathew.j.martineau@linux.intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
The 'sk_prot' field in token KUNIT self-tests will be dereferenced in
mptcp_token_new_connect(). Therefore, init it with tcp_prot.
Acked-by: Paolo Abeni <pabeni@redhat.com>
Signed-off-by: Menglong Dong <imagedong@tencent.com>
Signed-off-by: Mat Martineau <mathew.j.martineau@linux.intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
'sock->sk' is used frequently in mptcp_listen(). Therefore, we can
introduce the 'sk' and replace 'sock->sk' with it.
Acked-by: Paolo Abeni <pabeni@redhat.com>
Signed-off-by: Menglong Dong <imagedong@tencent.com>
Signed-off-by: Mat Martineau <mathew.j.martineau@linux.intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
The local variable 'ssk' has been defined at the beginning of the function
mptcp_write_options(), use it instead of getting 'ssk' again.
Reviewed-by: Mat Martineau <mathew.j.martineau@linux.intel.com>
Signed-off-by: Geliang Tang <geliang.tang@suse.com>
Signed-off-by: Mat Martineau <mathew.j.martineau@linux.intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Use the local variable 'net' instead of sock_net() in the functions where
the variable 'struct net *net' has been defined.
Reviewed-by: Mat Martineau <mathew.j.martineau@linux.intel.com>
Signed-off-by: Geliang Tang <geliang.tang@suse.com>
Signed-off-by: Mat Martineau <mathew.j.martineau@linux.intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
The helper msk_owned_by_me() is defined in protocol.h, so use it instead
of sock_owned_by_me().
Reviewed-by: Mat Martineau <mathew.j.martineau@linux.intel.com>
Signed-off-by: Geliang Tang <geliang.tang@suse.com>
Signed-off-by: Mat Martineau <mathew.j.martineau@linux.intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Commit b310de784bacd ("net: ipa: add IPA v4.7 support") was merged
despite an unresolved comment made by Konrad Dybcio. Konrad
observed that the IMEM region specified for IPA v4.7 did not match
that used downstream for the SM7225 SoC. In "lagoon.dtsi" present
in a Sony Xperia source tree, a ipa_smmu_ap node was defined with a
"qcom,additional-mapping" property that defined the IPA IMEM area
starting at offset 0x146a8000 (not 0x146a9000 that was committed).
The IPA v4.7 target system used for testing uses the SM7225 SoC, so
we'll adhere what the downstream code specifies is the address of
the IMEM region used for IPA.
Link: https://lore.kernel.org/linux-arm-msm/20221208211529.757669-1-elder@linaro.org
Fixes: b310de784bac ("net: ipa: add IPA v4.7 support")
Tested-by: Luca Weiss <luca.weiss@fairphone.com>
Signed-off-by: Alex Elder <elder@linaro.org>
Reviewed-by: Konrad Dybcio <konrad.dybcio@linaro.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
The introduction of support for Apple board types inadvertently changed
the precedence order, causing hybrid SMBIOS+DT platforms to look up the
firmware using the DMI information instead of the device tree compatible
to generate the board type. Revert back to the old behavior,
as affected platforms use firmwares named after the DT compatible.
Fixes: 7682de8b3351 ("wifi: brcmfmac: of: Fetch Apple properties")
[1] https://bugzilla.opensuse.org/show_bug.cgi?id=1206697#c13
Cc: stable@vger.kernel.org
Signed-off-by: Ivan T. Ivanov <iivanov@suse.de>
Reviewed-by: Hector Martin <marcan@marcan.st>
Reviewed-by: Arend van Spriel <arend.vanspriel@broadcom.com>
Tested-by: Peter Robinson <pbrobinson@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
The current source pushes skb into dev-done queue by calling
skb_dequeue_tail() and then pop it by skb_dequeue() to branch to
rx_cleanup state for freeing urb/skb in usbnet_bh(). It takes extra CPU
load, 2.21% (skb_queue_tail) as follows,
- 11.58% 0.26% swapper [k] usbnet_bh
- 11.32% usbnet_bh
- 6.43% skb_dequeue
6.34% _raw_spin_unlock_irqrestore
- 2.21% skb_queue_tail
2.19% _raw_spin_unlock_irqrestore
- 1.68% consume_skb
- 0.97% kfree_skbmem
0.80% kmem_cache_free
0.53% skb_release_data
To reduce the extra CPU load use return values to call helper function
usb_free_skb() to free the resources instead of calling skb_queue_tail()
and skb_dequeue() for push and pop respectively.
- 7.87% 0.25% swapper [k] usbnet_bh
- 7.62% usbnet_bh
- 4.81% skb_dequeue
4.74% _raw_spin_unlock_irqrestore
- 1.75% consume_skb
- 0.98% kfree_skbmem
0.78% kmem_cache_free
0.58% skb_release_data
0.53% smsc95xx_rx_fixup
Signed-off-by: Leesoo Ahn <lsahn@ooseel.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
Divya Koppera says:
====================
Fixed warnings
Fixed warnings related to PTR_ERR and initialization.
====================
Signed-off-by: David S. Miller <davem@davemloft.net>
Handle the NULL pointer case
Fixes New smatch warnings:
drivers/net/phy/micrel.c:2613 lan8814_ptp_probe_once() warn: passing zero to 'PTR_ERR'
vim +/PTR_ERR +2613 drivers/net/phy/micrel.c
Reported-by: kernel test robot <lkp@intel.com>
Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
Reviewed-by: Alexander Duyck <alexanderduyck@fb.com>
Signed-off-by: Divya Koppera <Divya.Koppera@microchip.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Initialized return variable
Fixes Old smatch warnings:
drivers/net/phy/micrel.c:1750 ksz886x_cable_test_get_status() error:
uninitialized symbol 'ret'.
Reported-by: kernel test robot <lkp@intel.com>
Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Divya Koppera <Divya.Koppera@microchip.com>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: David S. Miller <davem@davemloft.net>
Data buffer for active map is allocated in alloc_active_ring and freed
in free_active_ring function, which is used only for the error
cleanup. pvcalls_front_release is calling pvcalls_front_free_map which
ends foreign access for this buffer, but doesn't free allocated pages.
Call free_active_ring to clean all allocated resources.
Signed-off-by: Oleksii Moisieiev <oleksii_moisieiev@epam.com>
Reviewed-by: Stefano Stabellini <sstabellini@kernel.org>
Link: https://lore.kernel.org/r/6a762ee32dd655cbb09a4aa0e2307e8919761311.1671531297.git.oleksii_moisieiev@epam.com
Signed-off-by: Juergen Gross <jgross@suse.com>
The currently lockless access to the xen console list in
vtermno_to_xencons() is incorrect, as additions and removals from the
list can happen anytime, and as such the traversal of the list to get
the private console data for a given termno needs to happen with the
lock held. Note users that modify the list already do so with the
lock taken.
Adjust current lock takers to use the _irq{save,restore} helpers,
since the context in which vtermno_to_xencons() is called can have
interrupts disabled. Use the _irq{save,restore} set of helpers to
switch the current callers to disable interrupts in the locked region.
I haven't checked if existing users could instead use the _irq
variant, as I think it's safer to use _irq{save,restore} upfront.
While there switch from using list_for_each_entry_safe to
list_for_each_entry: the current entry cursor won't be removed as
part of the code in the loop body, so using the _safe variant is
pointless.
Fixes: 02e19f9c7cac ('hvc_xen: implement multiconsole support')
Signed-off-by: Roger Pau Monné <roger.pau@citrix.com>
Reviewed-by: Stefano Stabellini <sstabellini@kernel.org>
Link: https://lore.kernel.org/r/20221130163611.14686-1-roger.pau@citrix.com
Signed-off-by: Juergen Gross <jgross@suse.com>
The function p2m_index is defined in the p2m.c file, but not called
elsewhere, so remove this unused function.
arch/x86/xen/p2m.c:137:24: warning: unused function 'p2m_index'.
Link: https://bugzilla.openanolis.cn/show_bug.cgi?id=3557
Reported-by: Abaci Robot <abaci@linux.alibaba.com>
Signed-off-by: Jiapeng Chong <jiapeng.chong@linux.alibaba.com>
Reviewed-by: Juergen Gross <jgross@suse.com>
Link: https://lore.kernel.org/r/20230105090141.36248-1-jiapeng.chong@linux.alibaba.com
Signed-off-by: Juergen Gross <jgross@suse.com>
- Remove some incorrect assertions.
- Fix compiler warnings about variables that could be static.
- Fix an off by one error when computing the maximum btree height that
can cause repair failures.
- Fix the bulkstat-single ioctl not returning the root inode when asked
to do that.
- Convey NOFS state to inodegc workers to avoid recursion in reclaim.
- Fix unnecessary variable initializations.
- Fix a bug that could result in corruption of the busy extent tree.
Signed-off-by: Darrick J. Wong <djwong@kernel.org>
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Merge tag 'xfs-6.2-fixes-2' of git://git.kernel.org/pub/scm/fs/xfs/xfs-linux
Pull xfs fixes from Darrick Wong:
- Remove some incorrect assertions
- Fix compiler warnings about variables that could be static
- Fix an off by one error when computing the maximum btree height that
can cause repair failures
- Fix the bulkstat-single ioctl not returning the root inode when asked
to do that
- Convey NOFS state to inodegc workers to avoid recursion in reclaim
- Fix unnecessary variable initializations
- Fix a bug that could result in corruption of the busy extent tree
* tag 'xfs-6.2-fixes-2' of git://git.kernel.org/pub/scm/fs/xfs/xfs-linux:
xfs: fix extent busy updating
xfs: xfs_qm: remove unnecessary ‘0’ values from error
xfs: Fix deadlock on xfs_inodegc_worker
xfs: get root inode correctly at bulkstat
xfs: fix off-by-one error in xfs_btree_space_to_height
xfs: make xfs_iomap_page_ops static
xfs: don't assert if cmap covers imap after cycling lock
- Three fixes for various bogosity in our linker script, revealed by the recent commit
which changed discard behaviour with some toolchains.
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Merge tag 'powerpc-6.2-2' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux
Pull powerpc fixes from Michael Ellerman:
- Three fixes for various bogosity in our linker script, revealed
by the recent commit which changed discard behaviour with some
toolchains.
* tag 'powerpc-6.2-2' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux:
powerpc/vmlinux.lds: Don't discard .comment
powerpc/vmlinux.lds: Don't discard .rela* for relocatable builds
powerpc/vmlinux.lds: Define RUNTIME_DISCARD_EXIT
* Fix kernel-doc for memblock_phys_free() to use correct names for the
counterpart allocation methods
* Fix compilation error in memblock tests
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Merge tag 'fixes-2023-01-08' of git://git.kernel.org/pub/scm/linux/kernel/git/rppt/memblock
Pull memblock fixes from Mike Rapoport:
"Small fixes in kernel-doc and tests:
- Fix kernel-doc for memblock_phys_free() to use correct names for
the counterpart allocation methods
- Fix compilation error in memblock tests"
* tag 'fixes-2023-01-08' of git://git.kernel.org/pub/scm/linux/kernel/git/rppt/memblock:
memblock: Fix doc for memblock_phys_free
memblock tests: Fix compilation error.
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Merge tag 'rxrpc-fixes-20230107' of git://git.kernel.org/pub/scm/linux/kernel/git/dhowells/linux-fs
David Howells says:
====================
rxrpc: Fix race between call connection, data transmit and call disconnect
Here are patches to fix an oops[1] caused by a race between call
connection, initial packet transmission and call disconnection which
results in something like:
kernel BUG at net/rxrpc/peer_object.c:413!
when the syzbot test is run. The problem is that the connection procedure
is effectively split across two threads and can get expanded by taking an
interrupt, thereby adding the call to the peer error distribution list
*after* it has been disconnected (say by the rxrpc socket shutting down).
The easiest solution is to look at the fourth set of I/O thread
conversion/SACK table expansion patches that didn't get applied[2] and take
from it those patches that move call connection and disconnection into the
I/O thread. Moving these things into the I/O thread means that the
sequencing is managed by all being done in the same thread - and the race
can no longer happen.
This is preferable to introducing an extra lock as adding an extra lock
would make the I/O thread have to wait for the app thread in yet another
place.
The changes can be considered as a number of logical parts:
(1) Move all of the call state changes into the I/O thread.
(2) Make client connection ID space per-local endpoint so that the I/O
thread doesn't need locks to access it.
(3) Move actual abort generation into the I/O thread and clean it up. If
sendmsg or recvmsg want to cause an abort, they have to delegate it.
(4) Offload the setting up of the security context on a connection to the
thread of one of the apps that's starting a call. We don't want to be
doing any sort of crypto in the I/O thread.
(5) Connect calls (ie. assign them to channel slots on connections) in the
I/O thread. Calls are set up by sendmsg/kafs and passed to the I/O
thread to connect. Connections are allocated in the I/O thread after
this.
(6) Disconnect calls in the I/O thread.
I've also added a patch for an unrelated bug that cropped up during
testing, whereby a race can occur between an incoming call and socket
shutdown.
Note that whilst this fixes the original syzbot bug, another bug may get
triggered if this one is fixed:
INFO: rcu detected stall in corrupted
rcu: INFO: rcu_preempt detected expedited stalls on CPUs/tasks: { P5792 } 2657 jiffies s: 2825 root: 0x0/T
rcu: blocking rcu_node structures (internal RCU debug):
It doesn't look this should be anything to do with rxrpc, though, as I've
tested an additional patch[3] that removes practically all the RCU usage
from rxrpc and it still occurs. It seems likely that it is being caused by
something in the tunnelling setup that the syzbot test does, but there's
not enough info to go on. It also seems unlikely to be anything to do with
the afs driver as the test doesn't use that.
====================
Signed-off-by: David S. Miller <davem@davemloft.net>
Highlights include:
Bugfixes
- Fix a race in the RPCSEC_GSS upcall code that causes hung RPC calls
- Fix a broken coalescing test in the pNFS file layout driver
- Ensure that the access cache rcu path also applies the login test
- Fix up for a sparse warning
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Merge tag 'nfs-for-6.2-2' of git://git.linux-nfs.org/projects/trondmy/linux-nfs
Pull NFS client fixes from Trond Myklebust:
- Fix a race in the RPCSEC_GSS upcall code that causes hung RPC calls
- Fix a broken coalescing test in the pNFS file layout driver
- Ensure that the access cache rcu path also applies the login test
- Fix up for a sparse warning
* tag 'nfs-for-6.2-2' of git://git.linux-nfs.org/projects/trondmy/linux-nfs:
NFS: Fix up a sparse warning
NFS: Judge the file access cache's timestamp in rcu path
pNFS/filelayout: Fix coalescing test for single DS
SUNRPC: ensure the matching upcall is in-flight upon downcall
- Fix DT memory scanning for some MIPS boards when memory is not
specified in DT
- Redo CONFIG_CMDLINE* handling for missing /chosen node. The first
attempt broke PS3 (and possibly other PPC platforms).
- Fix constraints in QCom Soundwire schema
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Merge tag 'devicetree-fixes-for-6.2-1' of git://git.kernel.org/pub/scm/linux/kernel/git/robh/linux
Pull devicetree fixes from Rob Herring:
- Fix DT memory scanning for some MIPS boards when memory is not
specified in DT
- Redo CONFIG_CMDLINE* handling for missing /chosen node. The first
attempt broke PS3 (and possibly other PPC platforms).
- Fix constraints in QCom Soundwire schema
* tag 'devicetree-fixes-for-6.2-1' of git://git.kernel.org/pub/scm/linux/kernel/git/robh/linux:
of: fdt: Honor CONFIG_CMDLINE* even without /chosen node, take 2
Revert "of: fdt: Honor CONFIG_CMDLINE* even without /chosen node"
dt-bindings: soundwire: qcom,soundwire: correct sizes related to number of ports
of/fdt: run soc memory setup when early_init_dt_scan_memory fails
Here are some small USB driver fixes for 6.2-rc3 that resolve some
reported issues. They include:
- of-reported ulpi problem, so the offending commit is reverted
- dwc3 driver bugfixes for recent changes
- fotg210 fixes
Most of these have been in linux-next for a while, the last few were on
the mailing list for a long time and passed all the 0-day bot testing
so all should be fine with them as well.
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Merge tag 'usb-6.2-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb
Pull USB fixes from Greg KH:
"Here are some small USB driver fixes for 6.2-rc3 that resolve some
reported issues. They include:
- of-reported ulpi problem, so the offending commit is reverted
- dwc3 driver bugfixes for recent changes
- fotg210 fixes
Most of these have been in linux-next for a while, the last few were
on the mailing list for a long time and passed all the 0-day bot
testing so all should be fine with them as well"
* tag 'usb-6.2-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb:
usb: dwc3: gadget: Ignore End Transfer delay on teardown
usb: dwc3: xilinx: include linux/gpio/consumer.h
usb: fotg210-udc: fix error return code in fotg210_udc_probe()
usb: fotg210: fix OTG-only build
Revert "usb: ulpi: defer ulpi_register on ulpi_read_id timeout"
A big data corruption regression due to a change in the scatterlist
- Fix compilation warnings on gcc 13
- Oops when using some mlx5 stats
- Bad enforcement of atomic responder resources in mlx5
- Do not wrongly combine non-contiguous pages in scatterlist
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Merge tag 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/rdma/rdma
Pull rdma fixes from Jason Gunthorpe:
"Most noticeable is that Yishai found a big data corruption regression
due to a change in the scatterlist:
- Do not wrongly combine non-contiguous pages in scatterlist
- Fix compilation warnings on gcc 13
- Oops when using some mlx5 stats
- Bad enforcement of atomic responder resources in mlx5"
* tag 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/rdma/rdma:
lib/scatterlist: Fix to merge contiguous pages into the last SG properly
RDMA/mlx5: Fix validation of max_rd_atomic caps for DC
RDMA/mlx5: Fix mlx5_ib_get_hw_stats when used for device
RDMA/srp: Move large values to a new enum for gcc13
- Fix single *.ko build
- Fix module builds when vmlinux.o or Module.symver is missing
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Merge tag 'kbuild-fixes-v6.2-2' of git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild
Pull Kbuild fixes from Masahiro Yamada:
- Fix single *.ko build
- Fix module builds when vmlinux.o or Module.symver is missing
* tag 'kbuild-fixes-v6.2-2' of git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild:
kbuild: readd -w option when vmlinux.o or Module.symver is missing
kbuild: fix single *.ko build
The premise that "Once an svc thread is scheduled and executing an
RPC, no other processes will touch svc_rqst::rq_flags" is false.
svc_xprt_enqueue() examines the RQ_BUSY flag in scheduled nfsd
threads when determining which thread to wake up next.
Fixes: 9315564747cb ("NFSD: Use only RQ_DROPME to signal the need to drop a reply")
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
My professional email will change and the microchip one will bounce after
mid-november of 2022.
Update the MAINTAINERS file, the YAML bindings, MODULE_AUTHOR entries and
author mentions, and add an entry in the .mailmap file.
Signed-off-by: Tudor Ambarus <tudor.ambarus@microchip.com>
Acked-by: Rob Herring <robh@kernel.org>
Acked-by: Pratyush Yadav <pratyush@kernel.org>
Acked-by: Mark Brown <broonie@kernel.org>
Acked-by: Nicolas Ferre <nicolas.ferre@microchip.com>
Acked-by: Herbert Xu <herbert@gondor.apana.org.au>
Acked-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
Link: https://lore.kernel.org/linux-mtd/20221226144043.367706-1-tudor.ambarus@linaro.org
In order for the scheduler to be frequency invariant we measure the
ratio between the maximum CPU frequency and the actual CPU frequency.
During long tickless periods of time the calculations that keep track
of that might overflow, in the function scale_freq_tick():
if (check_shl_overflow(acnt, 2*SCHED_CAPACITY_SHIFT, &acnt))
goto error;
eventually forcing the kernel to disable the feature for all CPUs,
and show the warning message:
"Scheduler frequency invariance went wobbly, disabling!".
Let's avoid that by limiting the frequency invariant calculations
to CPUs with regular tick.
Fixes: e2b0d619b400 ("x86, sched: check for counters overflow in frequency invariant accounting")
Suggested-by: "Peter Zijlstra (Intel)" <peterz@infradead.org>
Signed-off-by: Yair Podemsky <ypodemsk@redhat.com>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Reviewed-by: Valentin Schneider <vschneid@redhat.com>
Acked-by: Giovanni Gherdovich <ggherdovich@suse.cz>
Link: https://lore.kernel.org/r/20221130125121.34407-1-ypodemsk@redhat.com
Grab the ATA port lock in sas_ata_device_link_abort() before calling
ata_link_abort() as outlined in this function's locking requirements.
Fixes: 44112922674b ("scsi: libsas: Add sas_ata_device_link_abort()")
Signed-off-by: Xingui Yang <yangxingui@huawei.com>
Reviewed-by: John Garry <john.g.garry@oracle.com>
Reviewed-by: Jason Yan <yanaijie@huawei.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
The reserved tags were put in the lower region of the tagset in commit
f7d190a94e35 ("scsi: hisi_sas: Put reserved tags in lower region of
tagset"). However, only the allocate function was changed, freeing was not
handled. This resulted in a failure to boot:
[ 33.467345] hisi_sas_v3_hw 0000:b4:02.0: task exec: failed[-132]!
[ 33.473413] sas: Executing internal abort failed 5000000000000603 (-132)
[ 33.480088] hisi_sas_v3_hw 0000:b4:02.0: I_T nexus reset: internal abort (-132)
[ 33.657336] hisi_sas_v3_hw 0000:b4:02.0: task exec: failed[-132]!
[ 33.663403] ata7.00: failed to IDENTIFY (I/O error, err_mask=0x40)
[ 35.787344] hisi_sas_v3_hw 0000:b4:04.0: task exec: failed[-132]!
[ 35.793411] sas: Executing internal abort failed 5000000000000703 (-132)
[ 35.800084] hisi_sas_v3_hw 0000:b4:04.0: I_T nexus reset: internal abort (-132)
[ 35.977335] hisi_sas_v3_hw 0000:b4:04.0: task exec: failed[-132]!
[ 35.983403] ata10.00: failed to IDENTIFY (I/O error, err_mask=0x40)
[ 35.989643] ata10.00: revalidation failed (errno=-5)
Fixes: f7d190a94e35 ("scsi: hisi_sas: Put reserved tags in lower region of tagset")
Cc: John Garry <john.g.garry@oracle.com>
Cc: Xiang Chen <chenxiang66@hisilicon.com>
Signed-off-by: Jason Yan <yanaijie@huawei.com>
Reviewed-by: John Garry <john.g.garry@oracle.com>
Acked-by: Xiang Chen <chenxiang66@hisilicon.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
An incoming call can race with rxrpc socket destruction, leading to a
leaked call. This may result in an oops when the call timer eventually
expires:
BUG: kernel NULL pointer dereference, address: 0000000000000874
RIP: 0010:_raw_spin_lock_irqsave+0x2a/0x50
Call Trace:
<IRQ>
try_to_wake_up+0x59/0x550
? __local_bh_enable_ip+0x37/0x80
? rxrpc_poke_call+0x52/0x110 [rxrpc]
? rxrpc_poke_call+0x110/0x110 [rxrpc]
? rxrpc_poke_call+0x110/0x110 [rxrpc]
call_timer_fn+0x24/0x120
with a warning in the kernel log looking something like:
rxrpc: Call 00000000ba5e571a still in use (1,SvAwtACK,1061d,0)!
incurred during rmmod of rxrpc. The 1061d is the call flags:
RECVMSG_READ_ALL, RX_HEARD, BEGAN_RX_TIMER, RX_LAST, EXPOSED,
IS_SERVICE, RELEASED
but no DISCONNECTED flag (0x800), so it's an incoming (service) call and
it's still connected.
The race appears to be that:
(1) rxrpc_new_incoming_call() consults the service struct, checks sk_state
and allocates a call - then pauses, possibly for an interrupt.
(2) rxrpc_release_sock() sets RXRPC_CLOSE, nulls the service pointer,
discards the prealloc and releases all calls attached to the socket.
(3) rxrpc_new_incoming_call() resumes, launching the new call, including
its timer and attaching it to the socket.
Fix this by read-locking local->services_lock to access the AF_RXRPC socket
providing the service rather than RCU in rxrpc_new_incoming_call().
There's no real need to use RCU here as local->services_lock is only
write-locked by the socket side in two places: when binding and when
shutting down.
Fixes: 5e6ef4f1017c ("rxrpc: Make the I/O thread take over the call and local processor work")
Reported-by: Marc Dionne <marc.dionne@auristor.com>
Signed-off-by: David Howells <dhowells@redhat.com>
cc: linux-afs@lists.infradead.org
bad_vaddr, bad_uaddr and error_code fields are set but never read by the
xtensa arch-specific code. Drop them. Also drop the commented out info
field.
Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
Jiawen Wu says:
====================
net: wangxun: Adjust code structure
Remove useless structs 'txgbe_hw' and 'ngbe_hw' make the codes clear.
And move the same codes which sets MAC address between txgbe and ngbe
to libwx. Further more, rename struct 'wx_hw' to 'wx' and move total
adapter members to wx.
====================
Link: https://lore.kernel.org/r/20230106033853.2806007-1-jiawenwu@trustnetic.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
In order to move the total members in struct adapter to struct wx_hw
to keep the code clean, it's a bad name of 'wx_hw' only for hardware.
Rename 'wx_hw' to 'wx', and rename the pointers at use.
Signed-off-by: Jiawen Wu <jiawenwu@trustnetic.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
For setting MAC address, both txgbe and ngbe drivers have the same handling
flow with different parameters. Move the same codes to libwx.
Signed-off-by: Jiawen Wu <jiawenwu@trustnetic.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
