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register_chrdev will only register the first 256 minors of a major chrdev.
That means that dynamically allocated misc devices with minor above 255
will fail to open with -ENXIO.
This was found by kernel test robot when testing a different change that
makes all dynamically allocated minors be above 255. This has, however,
been separately tested by creating 256 serio_raw devices with the help of
userio driver.
Ever since allowing misc devices with minors above 128, this has been
possible.
Fix it by registering all minor numbers from 0 to MINORMASK + 1 for
MISC_MAJOR.
Reported-by: kernel test robot <oliver.sang@intel.com>
Cc: stable <stable@kernel.org>
Closes: https://lore.kernel.org/oe-lkp/202503171507.6c8093d0-lkp@intel.com
Fixes: ab760791c0cf ("char: misc: Increase the maximum number of dynamic misc devices to 1048448")
Signed-off-by: Thadeu Lima de Souza Cascardo <cascardo@igalia.com>
Tested-by: Hou Wenlong <houwenlong.hwl@antgroup.com>
Link: https://lore.kernel.org/r/20250317-misc-chrdev-v1-1-6cd05da11aef@igalia.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Add Panther Lake H device id.
Cc: stable <stable@kernel.org>
Co-developed-by: Tomas Winkler <tomasw@gmail.com>
Signed-off-by: Tomas Winkler <tomasw@gmail.com>
Signed-off-by: Alexander Usyskin <alexander.usyskin@intel.com>
Link: https://lore.kernel.org/r/20250408130005.1358140-1-alexander.usyskin@intel.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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When ngbe_sw_init() is called, memory is allocated for wx->rss_key
in wx_init_rss_key(). However, in ngbe_probe() function, the subsequent
error paths after ngbe_sw_init() don't free the rss_key. Fix that by
freeing it in error path along with wx->mac_table.
Also change the label to which execution jumps when ngbe_sw_init()
fails, because otherwise, it could lead to a double free for rss_key,
when the mac_table allocation fails in wx_sw_init().
Fixes: 02338c484ab6 ("net: ngbe: Initialize sw info and register netdev")
Signed-off-by: Abdun Nihaal <abdun.nihaal@gmail.com>
Reviewed-by: Kory Maincent <kory.maincent@bootlin.com>
Reviewed-by: Jiawen Wu <jiawenwu@trustnetic.com>
Link: https://patch.msgid.link/20250412154927.25908-1-abdun.nihaal@gmail.com
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
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Rename the "data" variable inside msi_wmi_platform_read() to avoid
a name collision when the driver adds support for a state container
struct (that is to be called "data" too) in the future.
Signed-off-by: Armin Wolf <W_Armin@gmx.de>
Link: https://lore.kernel.org/r/20250414140453.7691-1-W_Armin@gmx.de
Reviewed-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
Signed-off-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
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Extend thermal control support to:
- Alienware Area-51m R2
- Alienware m16 R1
- Alienware m16 R2
- Dell G16 7630
- Dell G5 5505 SE
Cc: stable@vger.kernel.org
Signed-off-by: Kurt Borja <kuurtb@gmail.com>
Link: https://lore.kernel.org/r/20250411-awcc-support-v1-2-09a130ec4560@gmail.com
Reviewed-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
Signed-off-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
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Some users report the Alienware m16 R1 models, support G-Mode. This was
manually verified by inspecting their ACPI tables.
Cc: stable@vger.kernel.org
Signed-off-by: Kurt Borja <kuurtb@gmail.com>
Link: https://lore.kernel.org/r/20250411-awcc-support-v1-1-09a130ec4560@gmail.com
Reviewed-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
Signed-off-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
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It'll likely change how page pools store memory providers, so in
preparation for that, keep accesses in one place in io_uring by
introducing a helper.
Signed-off-by: Pavel Begunkov <asml.silence@gmail.com>
Link: https://lore.kernel.org/r/3522eb8fa9b4e21bcf32e7e9ae656c616b282210.1744722526.git.asml.silence@gmail.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>
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IORING_OP_RECV_ZC requests take a zcrx object id via sqe::zcrx_ifq_idx,
which binds it to the corresponding if / queue. However, we don't return
that id back to the user. It's fine as currently there can be only one
zcrx and the user assumes that its id should be 0, but as we'll need
multiple zcrx objects in the future let's explicitly pass it back on
registration.
Signed-off-by: Pavel Begunkov <asml.silence@gmail.com>
Link: https://lore.kernel.org/r/8714667d370651962f7d1a169032e5f02682a73e.1744722517.git.asml.silence@gmail.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>
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When `jr3_pci_detach()` is called during device removal, it calls
`timer_delete_sync()` to stop the timer, but the timer expiry function
always reschedules the timer, so the synchronization is ineffective.
Call `timer_shutdown_sync()` instead. It does not matter that the timer
expiry function pointer is cleared, because the device is being removed.
Fixes: 07b509e6584a5 ("Staging: comedi: add jr3_pci driver")
Cc: stable <stable@kernel.org>
Signed-off-by: Ian Abbott <abbotti@mev.co.uk>
Link: https://lore.kernel.org/r/20250415123901.13483-1-abbotti@mev.co.uk
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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The vma start address should be substracted from the buffer's user data
address and not the other way around.
Cc: Tiffany Y. Yang <ynaffit@google.com>
Cc: stable <stable@kernel.org>
Fixes: 162c79731448 ("binder: avoid user addresses in debug logs")
Signed-off-by: Carlos Llamas <cmllamas@google.com>
Reviewed-by: Tiffany Y. Yang <ynaffit@google.com>
Link: https://lore.kernel.org/r/20250325184902.587138-1-cmllamas@google.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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startup()/shutdown() callbacks access SIFIVE_SERIAL_IE_OFFS.
The register is also accessed from write() callback.
If console were printing and startup()/shutdown() callback
gets called, its access to the register could be overwritten.
Add port->lock to startup()/shutdown() callbacks to make sure
their access to SIFIVE_SERIAL_IE_OFFS is synchronized against
write() callback.
Fixes: 45c054d0815b ("tty: serial: add driver for the SiFive UART")
Signed-off-by: Ryo Takakura <ryotkkr98@gmail.com>
Reviewed-by: Petr Mladek <pmladek@suse.com>
Cc: stable@vger.kernel.org
Reviewed-by: John Ogness <john.ogness@linutronix.de>
Rule: add
Link: https://lore.kernel.org/stable/20250330003522.386632-1-ryotkkr98%40gmail.com
Link: https://lore.kernel.org/r/20250412001847.183221-1-ryotkkr98@gmail.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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We recently added some locking to this function but this error path
was accidentally missed. Unlock before returning.
Fixes: ec27386de23a ("usb: typec: class: Fix NULL pointer access")
Cc: stable <stable@kernel.org>
Signed-off-by: Dan Carpenter <dan.carpenter@linaro.org>
Reviewed-by: Heikki Krogerus <heikki.krogerus@linux.intel.com>
Link: https://lore.kernel.org/r/Z_44tOtmml89wQcM@stanley.mountain
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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The SanDisk 3.2Gen1 Flash Drive, which VID:PID is in 0781:55a3,
just like Silicon Motion Flash Drive:
https://lore.kernel.org/r/20250401023027.44894-1-limiao870622@163.com
also needs the DELAY_INIT quirk, or it will randomly work incorrectly
(e.g.: lsusb and can't list this device info) when connecting Huawei
hisi platforms and doing thousand of reboot test circles.
Cc: stable <stable@kernel.org>
Signed-off-by: Miao Li <limiao@kylinos.cn>
Signed-off-by: Lei Huang <huanglei@kylinos.cn>
Link: https://lore.kernel.org/r/20250414062935.159024-1-limiao870622@163.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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The driver core git tree has moved, so properly document it.
Cc: Rafael J. Wysocki <rafael@kernel.org>
Cc: Danilo Krummrich <dakr@kernel.org>
Cc: Tejun Heo <tj@kernel.org>
Cc: Dave Ertman <david.m.ertman@intel.com>
Cc: Ira Weiny <ira.weiny@intel.com>
Link: https://lore.kernel.org/r/2025041447-showbiz-other-7130@gregkh
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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The struct page->mapping, index fields are deprecated and soon to be only
available as part of a folio.
It is likely the intel_th code which sets page->mapping, index is was
implemented out of concern that some aspect of the page fault logic may
encounter unexpected problems should they not.
However, the appropriate interface for inserting kernel-allocated memory is
vm_insert_page() in a VM_MIXEDMAP. By using the helper function
vmf_insert_mixed() we can do this with minimal churn in the existing fault
handler.
By doing so, we bypass the remainder of the faulting logic. The pages are
still pinned so there is no possibility of anything unexpected being done
with the pages once established.
It would also be reasonable to pre-map everything on fault, however to
minimise churn we retain the fault handler.
We also eliminate all code which clears page->mapping on teardown as this
has now become unnecessary.
The MSU code relies on faulting to function correctly, so is by definition
dependent on CONFIG_MMU. We avoid spurious reports about compilation
failure for unsupported platforms by making this requirement explicit in
Kconfig as part of this change too.
Signed-off-by: Lorenzo Stoakes <lorenzo.stoakes@oracle.com>
Acked-by: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Link: https://lore.kernel.org/r/20250331125608.60300-1-lorenzo.stoakes@oracle.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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First get the devtype_data then check quirks.
Fixes: bbdffb341498 ("can: rockchip_canfd: add quirk for broken CAN-FD support")
Signed-off-by: Weizhao Ouyang <o451686892@gmail.com>
Reviewed-by: Vincent Mailhol <mailhol.vincent@wanadoo.fr>
Link: https://patch.msgid.link/20250324114416.10160-1-o451686892@gmail.com
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
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Like other protocols on top of AF_CAN family, also j1939_proto.inuse_idx
needs to be decremented on socket dismantle.
Fixes: 6bffe88452db ("can: add protocol counter for AF_CAN sockets")
Reported-by: Oliver Hartkopp <socketcan@hartkopp.net>
Closes: https://lore.kernel.org/linux-can/7e35b13f-bbc4-491e-9081-fb939e1b8df0@hartkopp.net/
Signed-off-by: Davide Caratti <dcaratti@redhat.com>
Acked-by: Oleksij Rempel <o.rempel@pengutronix.de>
Link: https://patch.msgid.link/09ce71f281b9e27d1e3d1104430bf3fceb8c7321.1742292636.git.dcaratti@redhat.com
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
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The audit code relies on the fact that kern_path_locked() returned a
path even for a negative dentry. If it doesn't find a valid dentry it
immediately calls:
audit_find_parent(d_backing_inode(parent_path.dentry));
which assumes that parent_path.dentry is still valid. But it isn't since
kern_path_locked() has been changed to path_put() also for a negative
dentry.
Fix this by adding a helper that implements the required audit semantics
and allows us to fix the immediate bleeding. We can find a unified
solution for this afterwards.
Link: https://lore.kernel.org/20250414-rennt-wimmeln-f186c3a780f1@brauner
Fixes: 1c3cb50b58c3 ("VFS: change kern_path_locked() and user_path_locked_at() to never return negative dentry")
Reported-and-tested-by: Vlastimil Babka <vbabka@suse.cz>
Signed-off-by: Christian Brauner <brauner@kernel.org>
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Both the hfs and hfsplus filesystem have been orphaned since at least
2014, i.e., over 10 years. It's time to remove them from the kernel as
they're exhibiting more and more issues and no one is stepping up to
fixing them.
Signed-off-by: Christian Brauner <brauner@kernel.org>
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This odd system call will be removed in the future. Let's decouple it
from CONFIG_EXPERT and switch the default to n as a first step.
Link: https://lore.kernel.org/20250415-dezimieren-wertpapier-9fd18a211a41@brauner
Signed-off-by: Christian Brauner <brauner@kernel.org>
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DSC 12 slices configuration is used for some specific cases with
Ultrajoiner. This can be supported only when each of the 4 joined pipes
have 3 DSC engines each.
Add the missing check for 3 DSC engines support before using 3 DSC
slices per pipe.
Fixes: be7f5fcdf4a0 ("drm/i915/dp: Enable 3 DSC engines for 12 slices")
Cc: Ankit Nautiyal <ankit.k.nautiyal@intel.com>
Cc: Suraj Kandpal <suraj.kandpal@intel.com>
Cc: <stable@vger.kernel.org> # v6.14+
Signed-off-by: Ankit Nautiyal <ankit.k.nautiyal@intel.com>
Reviewed-by: Suraj Kandpal <suraj.kandpal@intel.com>
Link: https://lore.kernel.org/r/20250414024256.2782702-3-ankit.k.nautiyal@intel.com
(cherry picked from commit da9b1c61e7f7b327dd70c5f073ba04d419a55ef8)
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
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3 DSC engines per pipe is currently supported only for BMG.
Add a macro to check whether a platform supports 3 DSC engines per pipe.
v2:Fix Typo in macro argument. (Suraj).
Added fixes tag.
Bspec: 50175
Fixes: be7f5fcdf4a0 ("drm/i915/dp: Enable 3 DSC engines for 12 slices")
Cc: Ankit Nautiyal <ankit.k.nautiyal@intel.com>
Cc: Suraj Kandpal <suraj.kandpal@intel.com>
Cc: <stable@vger.kernel.org> # v6.14+
Signed-off-by: Ankit Nautiyal <ankit.k.nautiyal@intel.com>
Reviewed-by: Suraj Kandpal <suraj.kandpal@intel.com>
Link: https://lore.kernel.org/r/20250414085701.2802374-1-ankit.k.nautiyal@intel.com
(cherry picked from commit 6998cfce0e1db58c730d08cadc6bfd71e26e2de0)
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
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Fix niu_try_msix() to not cause a fatal trap on sparc systems.
Set PCI_DEV_FLAGS_MSIX_TOUCH_ENTRY_DATA_FIRST on the struct pci_dev to
work around a bug in the hardware or firmware.
For each vector entry in the msix table, niu chips will cause a fatal
trap if any registers in that entry are read before that entries'
ENTRY_DATA register is written to. Testing indicates writes to other
registers are not sufficient to prevent the fatal trap, however the value
does not appear to matter. This only needs to happen once after power up,
so simply rebooting into a kernel lacking this fix will NOT cause the
trap.
NON-RESUMABLE ERROR: Reporting on cpu 64
NON-RESUMABLE ERROR: TPC [0x00000000005f6900] <msix_prepare_msi_desc+0x90/0xa0>
NON-RESUMABLE ERROR: RAW [4010000000000016:00000e37f93e32ff:0000000202000080:ffffffffffffffff
NON-RESUMABLE ERROR: 0000000800000000:0000000000000000:0000000000000000:0000000000000000]
NON-RESUMABLE ERROR: handle [0x4010000000000016] stick [0x00000e37f93e32ff]
NON-RESUMABLE ERROR: type [precise nonresumable]
NON-RESUMABLE ERROR: attrs [0x02000080] < ASI sp-faulted priv >
NON-RESUMABLE ERROR: raddr [0xffffffffffffffff]
NON-RESUMABLE ERROR: insn effective address [0x000000c50020000c]
NON-RESUMABLE ERROR: size [0x8]
NON-RESUMABLE ERROR: asi [0x00]
CPU: 64 UID: 0 PID: 745 Comm: kworker/64:1 Not tainted 6.11.5 #63
Workqueue: events work_for_cpu_fn
TSTATE: 0000000011001602 TPC: 00000000005f6900 TNPC: 00000000005f6904 Y: 00000000 Not tainted
TPC: <msix_prepare_msi_desc+0x90/0xa0>
g0: 00000000000002e9 g1: 000000000000000c g2: 000000c50020000c g3: 0000000000000100
g4: ffff8000470307c0 g5: ffff800fec5be000 g6: ffff800047a08000 g7: 0000000000000000
o0: ffff800014feb000 o1: ffff800047a0b620 o2: 0000000000000011 o3: ffff800047a0b620
o4: 0000000000000080 o5: 0000000000000011 sp: ffff800047a0ad51 ret_pc: 00000000005f7128
RPC: <__pci_enable_msix_range+0x3cc/0x460>
l0: 000000000000000d l1: 000000000000c01f l2: ffff800014feb0a8 l3: 0000000000000020
l4: 000000000000c000 l5: 0000000000000001 l6: 0000000020000000 l7: ffff800047a0b734
i0: ffff800014feb000 i1: ffff800047a0b730 i2: 0000000000000001 i3: 000000000000000d
i4: 0000000000000000 i5: 0000000000000000 i6: ffff800047a0ae81 i7: 00000000101888b0
I7: <niu_try_msix.constprop.0+0xc0/0x130 [niu]>
Call Trace:
[<00000000101888b0>] niu_try_msix.constprop.0+0xc0/0x130 [niu]
[<000000001018f840>] niu_get_invariants+0x183c/0x207c [niu]
[<00000000101902fc>] niu_pci_init_one+0x27c/0x2fc [niu]
[<00000000005ef3e4>] local_pci_probe+0x28/0x74
[<0000000000469240>] work_for_cpu_fn+0x8/0x1c
[<000000000046b008>] process_scheduled_works+0x144/0x210
[<000000000046b518>] worker_thread+0x13c/0x1c0
[<00000000004710e0>] kthread+0xb8/0xc8
[<00000000004060c8>] ret_from_fork+0x1c/0x2c
[<0000000000000000>] 0x0
Kernel panic - not syncing: Non-resumable error.
Fixes: 7d5ec3d36123 ("PCI/MSI: Mask all unused MSI-X entries")
Signed-off-by: Jonathan Currier <dullfire@yahoo.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: stable@vger.kernel.org
Link: https://lore.kernel.org/all/20241117234843.19236-3-dullfire@yahoo.com
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Commit 7d5ec3d36123 ("PCI/MSI: Mask all unused MSI-X entries") introduced a
readl() from ENTRY_VECTOR_CTRL before the writel() to ENTRY_DATA.
This is correct, however some hardware, like the Sun Neptune chips, the NIU
module, will cause an error and/or fatal trap if any MSIX table entry is
read before the corresponding ENTRY_DATA field is written to.
Add an optional early writel() in msix_prepare_msi_desc().
Fixes: 7d5ec3d36123 ("PCI/MSI: Mask all unused MSI-X entries")
Signed-off-by: Jonathan Currier <dullfire@yahoo.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: stable@vger.kernel.org
Link: https://lore.kernel.org/all/20241117234843.19236-2-dullfire@yahoo.com
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The user can set any value for 'deadtime'. This affects the arithmetic
expression 'req->deadtime * SMB_ECHO_INTERVAL', which is subject to
overflow. The added check makes the server behavior more predictable.
Found by Linux Verification Center (linuxtesting.org) with SVACE.
Fixes: 0626e6641f6b ("cifsd: add server handler for central processing and tranport layers")
Cc: stable@vger.kernel.org
Signed-off-by: Denis Arefev <arefev@swemel.ru>
Acked-by: Namjae Jeon <linkinjeon@kernel.org>
Signed-off-by: Steve French <stfrench@microsoft.com>
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[ 2110.972290] ------------[ cut here ]------------
[ 2110.972301] WARNING: CPU: 3 PID: 735 at fs/read_write.c:599 __kernel_write_iter+0x21b/0x280
This patch doesn't allow writing to directory.
Cc: stable@vger.kernel.org
Reported-by: Norbert Szetei <norbert@doyensec.com>
Tested-by: Norbert Szetei <norbert@doyensec.com>
Signed-off-by: Namjae Jeon <linkinjeon@kernel.org>
Signed-off-by: Steve French <stfrench@microsoft.com>
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There is a room in smb_break_all_levII_oplock that can cause racy issues
when unlocking in the middle of the loop. This patch use read lock
to protect whole loop.
Cc: stable@vger.kernel.org
Reported-by: Norbert Szetei <norbert@doyensec.com>
Tested-by: Norbert Szetei <norbert@doyensec.com>
Signed-off-by: Namjae Jeon <linkinjeon@kernel.org>
Signed-off-by: Steve French <stfrench@microsoft.com>
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Move tcp_transport free to ksmbd_conn_free. If ksmbd connection is
referenced when ksmbd server thread terminates, It will not be freed,
but conn->tcp_transport is freed. __smb2_lease_break_noti can be performed
asynchronously when the connection is disconnected. __smb2_lease_break_noti
calls ksmbd_conn_write, which can cause use-after-free
when conn->ksmbd_transport is already freed.
Cc: stable@vger.kernel.org
Reported-by: Norbert Szetei <norbert@doyensec.com>
Tested-by: Norbert Szetei <norbert@doyensec.com>
Signed-off-by: Namjae Jeon <linkinjeon@kernel.org>
Signed-off-by: Steve French <stfrench@microsoft.com>
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wait_event_timeout() will set the state of the current
task to TASK_UNINTERRUPTIBLE, before doing the condition check. This
means that ksmbd_durable_scavenger_alive() will try to acquire the mutex
while already in a sleeping state. The scheduler warns us by giving
the following warning:
do not call blocking ops when !TASK_RUNNING; state=2 set at
[<0000000061515a6f>] prepare_to_wait_event+0x9f/0x6c0
WARNING: CPU: 2 PID: 4147 at kernel/sched/core.c:10099 __might_sleep+0x12f/0x160
mutex lock is not needed in ksmbd_durable_scavenger_alive().
Signed-off-by: Namjae Jeon <linkinjeon@kernel.org>
Signed-off-by: Steve French <stfrench@microsoft.com>
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krb_authenticate frees sess->user and does not set the pointer
to NULL. It calls ksmbd_krb5_authenticate to reinitialise
sess->user but that function may return without doing so. If
that happens then smb2_sess_setup, which calls krb_authenticate,
will be accessing free'd memory when it later uses sess->user.
Cc: stable@vger.kernel.org
Signed-off-by: Sean Heelan <seanheelan@gmail.com>
Acked-by: Namjae Jeon <linkinjeon@kernel.org>
Signed-off-by: Steve French <stfrench@microsoft.com>
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It's not safe to access nla_len(ovs_key) if the data is smaller than
the netlink header. Check that the attribute is OK first.
Fixes: ccb1352e76cf ("net: Add Open vSwitch kernel components.")
Reported-by: syzbot+b07a9da40df1576b8048@syzkaller.appspotmail.com
Closes: https://syzkaller.appspot.com/bug?extid=b07a9da40df1576b8048
Tested-by: syzbot+b07a9da40df1576b8048@syzkaller.appspotmail.com
Signed-off-by: Ilya Maximets <i.maximets@ovn.org>
Reviewed-by: Eelco Chaudron <echaudro@redhat.com>
Acked-by: Aaron Conole <aconole@redhat.com>
Link: https://patch.msgid.link/20250412104052.2073688-1-i.maximets@ovn.org
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
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git://git.kernel.org/pub/scm/linux/kernel/git/tnguy/net-queue
Tony Nguyen says:
====================
igc: Fix PTM timeout
Christopher S M Hall says:
There have been sporadic reports of PTM timeouts using i225/i226 devices
These timeouts have been root caused to:
1) Manipulating the PTM status register while PTM is enabled
and triggered
2) The hardware retrying too quickly when an inappropriate response
is received from the upstream device
The issue can be reproduced with the following:
$ sudo phc2sys -R 1000 -O 0 -i tsn0 -m
Note: 1000 Hz (-R 1000) is unrealistically large, but provides a way to
quickly reproduce the issue.
PHC2SYS exits with:
"ioctl PTP_OFFSET_PRECISE: Connection timed out" when the PTM transaction
fails
The first patch in this series also resolves an issue reported by Corinna
Vinschen relating to kdump:
This patch also fixes a hang in igc_probe() when loading the igc
driver in the kdump kernel on systems supporting PTM.
The igc driver running in the base kernel enables PTM trigger in
igc_probe(). Therefore the driver is always in PTM trigger mode,
except in brief periods when manually triggering a PTM cycle.
When a crash occurs, the NIC is reset while PTM trigger is enabled.
Due to a hardware problem, the NIC is subsequently in a bad busmaster
state and doesn't handle register reads/writes. When running
igc_probe() in the kdump kernel, the first register access to a NIC
register hangs driver probing and ultimately breaks kdump.
With this patch, igc has PTM trigger disabled most of the time,
and the trigger is only enabled for very brief (10 - 100 us) periods
when manually triggering a PTM cycle. Chances that a crash occurs
during a PTM trigger are not zero, but extremly reduced.
* '1GbE' of git://git.kernel.org/pub/scm/linux/kernel/git/tnguy/net-queue:
igc: add lock preventing multiple simultaneous PTM transactions
igc: cleanup PTP module if probe fails
igc: handle the IGC_PTP_ENABLED flag correctly
igc: move ktime snapshot into PTM retry loop
igc: increase wait time before retrying PTM
igc: fix PTM cycle trigger logic
====================
Link: https://patch.msgid.link/20250411162857.2754883-1-anthony.l.nguyen@intel.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
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I have done quite some review on hugetlb code over the years, and some
work on it as well, the latest being the hugetlb pagewalk unification
which is a work in progress, and touches hugetlb code to great lengths.
HugeTLB does not have many reviewers, so I would like to help out by
offering myself as an official Reviewer.
Signed-off-by: Oscar Salvador <osalvador@suse.de>
Link: https://lkml.kernel.org/r/20250409082452.269180-1-osalvador@suse.de
Acked-by: David Hildenbrand <david@redhat.com>
Acked-by: Vlastimil Babka <vbabka@suse.cz>
Acked-by: Muchun Song <muchun.song@linux.dev>
Cc: Michal Hocko <mhocko@suse.com>
Cc: Peter Xu <peterx@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
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We started generating C code for OvS a while back, but actually
C codegen only supports fixed headers specified at the family
level right now (schema also allows specifying them per op).
ovs_flow and ovs_datapath already specify the fixed header
at the family level but ovs_vport does it per op.
Move the property, all ops use the same header.
This ensures YNL C sees the correct hdr_len:
const struct ynl_family ynl_ovs_vport_family = {
.name = "ovs_vport",
- .hdr_len = sizeof(struct genlmsghdr),
+ .hdr_len = sizeof(struct genlmsghdr) + sizeof(struct ovs_header),
};
Fixes: 7c59c9c8f202 ("tools: ynl: generate code for ovs families")
Link: https://patch.msgid.link/20250409145541.580674-1-kuba@kernel.org
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
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Lockdep found the following dependency:
&dev_instance_lock_key#3 -->
&rdev->wiphy.mtx -->
&net->xdp.lock -->
&xs->mutex -->
&dev_instance_lock_key#3
The first dependency is the problem. wiphy mutex should be outside
the instance locks. The problem happens in notifiers (as always)
for CLOSE. We only hold the instance lock for ops locked devices
during CLOSE, and WiFi netdevs are not ops locked. Unfortunately,
when we dev_close_many() during netns dismantle we may be holding
the instance lock of _another_ netdev when issuing a CLOSE for
a WiFi device.
Lockdep's "Possible unsafe locking scenario" only prints 3 locks
and we have 4, plus I think we'd need 3 CPUs, like this:
CPU0 CPU1 CPU2
---- ---- ----
lock(&xs->mutex);
lock(&dev_instance_lock_key#3);
lock(&rdev->wiphy.mtx);
lock(&net->xdp.lock);
lock(&xs->mutex);
lock(&rdev->wiphy.mtx);
lock(&dev_instance_lock_key#3);
Tho, I don't think that's possible as CPU1 and CPU2 would
be under rtnl_lock. Even if we have per-netns rtnl_lock and
wiphy can span network namespaces - CPU0 and CPU1 must be
in the same netns to see dev_instance_lock, so CPU0 can't
be installing a socket as CPU1 is tearing the netns down.
Regardless, our expected lock ordering is that wiphy lock
is taken before instance locks, so let's fix this.
Go over the ops locked and non-locked devices separately.
Note that calling dev_close_many() on an empty list is perfectly
fine. All processing (including RCU syncs) are conditional
on the list not being empty, already.
Fixes: 7e4d784f5810 ("net: hold netdev instance lock during rtnetlink operations")
Reported-by: syzbot+6f588c78bf765b62b450@syzkaller.appspotmail.com
Acked-by: Stanislav Fomichev <sdf@fomichev.me>
Link: https://patch.msgid.link/20250412233011.309762-1-kuba@kernel.org
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
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The gpiod_direction_output_raw_commit() function checks if any setter
callback is present before doing anything. As the new GPIO setters with
return values were introduced, make this check also succeed if one is
present.
Fixes: 98ce1eb1fd87 ("gpiolib: introduce gpio_chip setters that return values")
Signed-off-by: Mathieu Dubois-Briand <mathieu.dubois-briand@bootlin.com>
Link: https://lore.kernel.org/r/20250411-mdb-gpiolib-setters-fix-v2-1-9611280d8822@bootlin.com
Signed-off-by: Bartosz Golaszewski <brgl@bgdev.pl>
|
|
Pull rdma fixes from Jason Gunthorpe:
- Fix hang in bnxt_re due to miscomputing the budget
- Avoid a -Wformat-security message in dev_set_name()
- Avoid an unused definition warning in fs.c with some kconfigs
- Fix error handling in usnic and remove IS_ERR_OR_NULL() usage
- Regression in RXE support foudn by blktests due to missing ODP
exclusions
- Set the dma_segment_size on HNS so it doesn't corrupt DMA when using
very large IOs
- Move a INIT_WORK to near when the work is allocated in cm.c to fix a
racey crash where work in progress was being init'd
- Use __GFP_NOWARN to not dump in kvcalloc() if userspace requests a
very big MR
* tag 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/rdma/rdma:
RDMA/bnxt_re: Remove unusable nq variable
RDMA/core: Silence oversized kvmalloc() warning
RDMA/cma: Fix workqueue crash in cma_netevent_work_handler
RDMA/hns: Fix wrong maximum DMA segment size
RDMA/rxe: Fix null pointer dereference in ODP MR check
RDMA/mlx5: Fix compilation warning when USER_ACCESS isn't set
RDMA/usnic: Fix passing zero to PTR_ERR in usnic_ib_pci_probe()
RDMA/ucaps: Avoid format-security warning
RDMA/bnxt_re: Fix budget handling of notification queue
|
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git://git.kernel.org/pub/scm/linux/kernel/git/vfs/vfs
Pull vfs fixes from Christian Brauner:
- Fix NULL pointer dereference in virtiofs
- Fix slab OOB access in hfs/hfsplus
- Only create /proc/fs/netfs when CONFIG_PROC_FS is set
- Fix getname_flags() to initialize pointer correctly
- Convert dentry flags to enum
- Don't allow datadir without lowerdir in overlayfs
- Use namespace_{lock,unlock} helpers in dissolve_on_fput() instead of
plain namespace_sem so unmounted mounts are properly cleaned up
- Skip unnecessary ifs_block_is_uptodate check in iomap
- Remove an unused forward declaration in overlayfs
- Fix devpts uid/gid handling after converting to the new mount api
- Fix afs_dynroot_readdir() to not use the RCU read lock
- Fix mount_setattr() and open_tree_attr() to not pointlessly do path
lookup or walk the mount tree if no mount option change has been
requested
* tag 'vfs-6.15-rc3.fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/vfs/vfs:
fs: use namespace_{lock,unlock} in dissolve_on_fput()
iomap: skip unnecessary ifs_block_is_uptodate check
fs: Fix filename init after recent refactoring
netfs: Only create /proc/fs/netfs with CONFIG_PROC_FS
mount: ensure we don't pointlessly walk the mount tree
dcache: convert dentry flag macros to enum
afs: Fix afs_dynroot_readdir() to not use the RCU read lock
hfs/hfsplus: fix slab-out-of-bounds in hfs_bnode_read_key
virtiofs: add filesystem context source name check
devpts: Fix type for uid and gid params
ovl: remove unused forward declaration
ovl: don't allow datadir only
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git://git.kernel.org/pub/scm/linux/kernel/git/perf/perf-tools
Pull perf tools fixes from Namhyung Kim:
"A couple of fixes and the usual tooling header updates:
- fix a build error on ARM64 when libunwind is requested
- fix an infinite loop with branch stack on AMD Zen3
- sync tooling headers with the kernel source"
* tag 'perf-tools-fixes-for-v6.15-2025-04-13' of git://git.kernel.org/pub/scm/linux/kernel/git/perf/perf-tools:
perf tools: Remove evsel__handle_error_quirks()
perf libunwind arm64: Fix missing close parens in an if statement
tools headers: Update the arch/x86/lib/memset_64.S copy with the kernel sources
tools headers: Update the x86 headers with the kernel sources
tools headers: Update the linux/unaligned.h copy with the kernel sources
tools headers: Update the uapi/asm-generic/mman-common.h copy with the kernel sources
tools headers: Update the uapi/linux/prctl.h copy with the kernel sources
tools headers: Update the syscall table with the kernel sources
tools headers: Update the VFS headers with the kernel sources
tools headers: Update the uapi/linux/perf_event.h copy with the kernel sources
tools headers: Update the socket headers with the kernel sources
tools headers: Update the KVM headers with the kernel sources
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The default SH kunit configuration sets CONFIG_CMDLINE_OVERWRITE which
completely disregards the cmdline passed from the bootloader/QEMU in favor
of the builtin CONFIG_CMDLINE.
However the kunit tool needs to pass arguments to the in-kernel kunit core,
for filters and other runtime parameters.
Enable CONFIG_CMDLINE_EXTEND instead, so kunit arguments are respected.
Link: https://lore.kernel.org/r/20250407-kunit-sh-v1-1-f5432a54cf2f@linutronix.de
Fixes: 8110a3cab05e ("kunit: tool: Add support for SH under QEMU")
Signed-off-by: Thomas Weißschuh <thomas.weissschuh@linutronix.de>
Reviewed-by: David Gow <davidgow@google.com>
Signed-off-by: Shuah Khan <skhan@linuxfoundation.org>
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Commit b52aaeeadfac ("cpufreq: intel_pstate: Avoid SMP calls to get
cpu-type") introduced two issues into hwp_get_cpu_scaling(). First,
it made that function use the CPU type of the CPU running the code
even though the target CPU is passed as the argument to it and second,
it used smp_processor_id() for that even though hwp_get_cpu_scaling()
runs in preemptible context.
Fix both of these problems by simply passing "cpu" to cpu_data().
Fixes: b52aaeeadfac ("cpufreq: intel_pstate: Avoid SMP calls to get cpu-type")
Link: https://lore.kernel.org/linux-pm/20250412103434.5321-1-xry111@xry111.site/
Reported-by: Xi Ruoyao <xry111@xry111.site>
Acked-by: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Link: https://patch.msgid.link/12659608.O9o76ZdvQC@rjwysocki.net
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Starting with Rust 1.86.0 (see upstream commit b151b513ba2b ("Insert null
checks for pointer dereferences when debug assertions are enabled") [1]),
under some kernel configurations with `CONFIG_RUST_DEBUG_ASSERTIONS=y`,
one may trigger a new `objtool` warning:
rust/kernel.o: warning: objtool: _R..._6kernel9workqueue6system()
falls through to next function _R...9workqueue14system_highpri()
due to a call to the `noreturn` symbol:
core::panicking::panic_null_pointer_dereference
Thus add it to the list so that `objtool` knows it is actually `noreturn`.
See commit 56d680dd23c3 ("objtool/rust: list `noreturn` Rust functions")
for more details.
Cc: stable@vger.kernel.org # Needed in 6.12.y and later (Rust is pinned in older LTSs).
Fixes: 56d680dd23c3 ("objtool/rust: list `noreturn` Rust functions")
Link: https://github.com/rust-lang/rust/commit/b151b513ba2b65c7506ec1a80f2712bbd09154d1 [1]
Reviewed-by: Alice Ryhl <aliceryhl@google.com>
Link: https://lore.kernel.org/r/20250413002338.1741593-1-ojeda@kernel.org
Signed-off-by: Miguel Ojeda <ojeda@kernel.org>
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|
Typically pdev->irq is consistent with whether the device itself
supports INTx, where device support is reported via the PIN register.
Therefore the PIN register is often already zero if pdev->irq is zero.
Recently virtualization of the PIN register was expanded to include
the case where the device supports INTx but the platform does not
route the interrupt. This is reported by a value of IRQ_NOTCONNECTED
on some architectures. Other architectures just report zero for
pdev->irq.
We already disallow INTx setup if pdev->irq is zero, therefore add
this to the PIN register virtualization criteria so that a consistent
view is provided to userspace through virtualized config space and
ioctls.
Reported-by: Shivaprasad G Bhat <sbhat@linux.ibm.com>
Link: https://lore.kernel.org/all/174231895238.2295.12586708771396482526.stgit@linux.ibm.com/
Tested-by: Shivaprasad G Bhat <sbhat@linux.ibm.com>
Link: https://lore.kernel.org/r/20250320194145.2816379-1-alex.williamson@redhat.com
Signed-off-by: Alex Williamson <alex.williamson@redhat.com>
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|
When registering a queue fails after blk_mq_sysfs_register() is
successful but the function later encounters an error, we need
to clean up the blk_mq_sysfs resources.
Add the missing blk_mq_sysfs_unregister() call in the error path
to properly clean up these resources and prevent a memory leak.
Fixes: 320ae51feed5 ("blk-mq: new multi-queue block IO queueing mechanism")
Signed-off-by: Zheng Qixing <zhengqixing@huawei.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Yu Kuai <yukuai3@huawei.com>
Link: https://lore.kernel.org/r/20250412092554.475218-1-zhengqixing@huaweicloud.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>
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|
Add an SPDX license identifier line to blk-throttle.h
Use 'GPL-2.0' as the identifier, since blk-throttle.c uses
that, and blk.h (from which some material was copied when
blk-throttle.h was created) also uses that identifier.
Signed-off-by: Tim Bird <tim.bird@sony.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Link: https://lore.kernel.org/r/MW5PR13MB5632EE4645BCA24ED111EC0EFDB62@MW5PR13MB5632.namprd13.prod.outlook.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>
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|
If KASAN is enabled, and one runs in a clean repository e.g.:
make LLVM=1 prepare
make LLVM=1 prepare
Then the Rust code gets rebuilt, which should not happen.
The reason is some of the LLVM KASAN `rustc` flags are added in the
second run:
-Cllvm-args=-asan-instrumentation-with-call-threshold=10000
-Cllvm-args=-asan-stack=0
-Cllvm-args=-asan-globals=1
-Cllvm-args=-asan-kernel-mem-intrinsic-prefix=1
Further runs do not rebuild Rust because the flags do not change anymore.
Rebuilding like that in the second run is bad, even if this just happens
with KASAN enabled, but missing flags in the first one is even worse.
The root issue is that we pass, for some architectures and for the moment,
a generated `target.json` file. That file is not ready by the time `rustc`
gets called for the flag test, and thus the flag test fails just because
the file is not available, e.g.:
$ ... --target=./scripts/target.json ... -Cllvm-args=...
error: target file "./scripts/target.json" does not exist
There are a few approaches we could take here to solve this. For instance,
we could ensure that every time that the config is rebuilt, we regenerate
the file and recompute the flags. Or we could use the LLVM version to
check for these flags, instead of testing the flag (which may have other
advantages, such as allowing us to detect renames on the LLVM side).
However, it may be easier than that: `rustc` is aware of the `-Cllvm-args`
regardless of the `--target` (e.g. I checked that the list printed
is the same, plus that I can check for these flags even if I pass
a completely unrelated target), and thus we can just eliminate the
dependency completely.
Thus filter out the target.
This does mean that `rustc-option` cannot be used to test a flag that
requires the right target, but we don't have other users yet, it is a
minimal change and we want to get rid of custom targets in the future.
We could only filter in the case `target.json` is used, to make it work
in more cases, but then it would be harder to notice that it may not
work in a couple architectures.
Cc: Matthew Maurer <mmaurer@google.com>
Cc: Sami Tolvanen <samitolvanen@google.com>
Cc: stable@vger.kernel.org
Fixes: e3117404b411 ("kbuild: rust: Enable KASAN support")
Tested-by: Alice Ryhl <aliceryhl@google.com>
Link: https://lore.kernel.org/r/20250408220311.1033475-1-ojeda@kernel.org
Signed-off-by: Miguel Ojeda <ojeda@kernel.org>
|
|
In the debug and resolution of an issue involving forced use of bounce
buffers, 7170130e4c72 ("x86/mm/init: Handle the special case of device
private pages in add_pages(), to not increase max_pfn and trigger
dma_addressing_limited() bounce buffers"). It would have been easier
to debug the issue if dma_addressing_limited() had debug information
about the device not being able to address all of memory and thus forcing
all accesses through a bounce buffer. Please see[2]
Implement dev_dbg to debug the potential use of bounce buffers
when we hit the condition. When swiotlb is used,
dma_addressing_limited() is used to determine the size of maximum dma
buffer size in dma_direct_max_mapping_size(). The debug prints could be
triggered in that check as well (when enabled).
Link: https://lore.kernel.org/lkml/20250401000752.249348-1-balbirs@nvidia.com/ [1]
Link: https://lore.kernel.org/lkml/20250310112206.4168-1-spasswolf@web.de/ [2]
Cc: Marek Szyprowski <m.szyprowski@samsung.com>
Cc: Robin Murphy <robin.murphy@arm.com>
Cc: "Christian König" <christian.koenig@amd.com>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Kees Cook <kees@kernel.org>
Cc: Bjorn Helgaas <bhelgaas@google.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Andy Lutomirski <luto@kernel.org>
Cc: Alex Deucher <alexander.deucher@amd.com>
Cc: Bert Karwatzki <spasswolf@web.de>
Cc: Christoph Hellwig <hch@infradead.org>
Signed-off-by: Balbir Singh <balbirs@nvidia.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com>
Link: https://lore.kernel.org/r/20250414113752.3298276-1-balbirs@nvidia.com
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|
Starting with Rust 1.86.0, Clippy's `needless_continue` lint complains
about the last statement of a loop [1], including cases like:
while ... {
match ... {
... if ... => {
...
return ...;
}
_ => continue,
}
}
as well as nested `match`es in a loop.
One solution is changing `continue` for `()` [2], but arguably using
`continue` shows the intent better when it is alone in an arm like that.
Moreover, I am not sure we want to force people to try to find other
ways to write the code either, in cases when that applies.
In addition, the help text does not really apply in the new cases the
lint has introduced, e.g. here one cannot simply "drop" the expression:
warning: this `continue` expression is redundant
--> rust/macros/helpers.rs:85:18
|
85 | _ => continue,
| ^^^^^^^^
|
= help: consider dropping the `continue` expression
= help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_continue
= note: requested on the command line with `-W clippy::needless-continue`
The examples in the documentation do not show a case like this, either,
so the second "help" line does not help.
In addition, locally disabling the lint is not possible with `expect`,
since the behavior differs across versions. Using `allow` would be
possible, but, even then, an extra line just for this is a bit too much,
especially if there are other ways to satisfy the lint.
Finally, the lint is still in the "pedantic" category and disabled by
default by Clippy.
Thus disable the lint, at least for the time being.
Feedback was submitted to upstream Clippy, in case this can be improved
or perhaps the lint split into several [3].
Cc: stable@vger.kernel.org # Needed in 6.12.y and later (Rust is pinned in older LTSs).
Link: https://github.com/rust-lang/rust-clippy/pull/13891 [1]
Link: https://lore.kernel.org/rust-for-linux/20250401221205.52381-1-ojeda@kernel.org/ [2]
Link: https://github.com/rust-lang/rust-clippy/issues/14536 [3]
Link: https://lore.kernel.org/r/20250403163805.67770-1-ojeda@kernel.org
Reviewed-by: Alice Ryhl <aliceryhl@google.com>
Signed-off-by: Miguel Ojeda <ojeda@kernel.org>
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|
syzbot reports a data-race when accessing the event_triggered, here is the
simplified stack when the issue occurred:
==================================================================
BUG: KCSAN: data-race in virtqueue_disable_cb / virtqueue_enable_cb_delayed
write to 0xffff8881025bc452 of 1 bytes by task 3288 on cpu 0:
virtqueue_enable_cb_delayed+0x42/0x3c0 drivers/virtio/virtio_ring.c:2653
start_xmit+0x230/0x1310 drivers/net/virtio_net.c:3264
__netdev_start_xmit include/linux/netdevice.h:5151 [inline]
netdev_start_xmit include/linux/netdevice.h:5160 [inline]
xmit_one net/core/dev.c:3800 [inline]
read to 0xffff8881025bc452 of 1 bytes by interrupt on cpu 1:
virtqueue_disable_cb_split drivers/virtio/virtio_ring.c:880 [inline]
virtqueue_disable_cb+0x92/0x180 drivers/virtio/virtio_ring.c:2566
skb_xmit_done+0x5f/0x140 drivers/net/virtio_net.c:777
vring_interrupt+0x161/0x190 drivers/virtio/virtio_ring.c:2715
__handle_irq_event_percpu+0x95/0x490 kernel/irq/handle.c:158
handle_irq_event_percpu kernel/irq/handle.c:193 [inline]
value changed: 0x01 -> 0x00
==================================================================
When the data race occurs, the function virtqueue_enable_cb_delayed() sets
event_triggered to false, and virtqueue_disable_cb_split/packed() reads it
as false due to the race condition. Since event_triggered is an unreliable
hint used for optimization, this should only cause the driver temporarily
suggest that the device not send an interrupt notification when the event
index is used.
Fix this KCSAN reported data-race issue by explicitly tagging the access as
data_racy.
Reported-by: syzbot+efe683d57990864b8c8e@syzkaller.appspotmail.com
Closes: https://lore.kernel.org/all/67c7761a.050a0220.15b4b9.0018.GAE@google.com/
Signed-off-by: Zhongqiu Han <quic_zhonhan@quicinc.com>
Message-Id: <20250312130412.3516307-1-quic_zhonhan@quicinc.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Acked-by: Jason Wang <jasowang@redhat.com>
|
|
VHOST_OWNER_SET and VHOST_OWNER_RESET are used in the documentation
instead of VHOST_SET_OWNER and VHOST_RESET_OWNER respectively.
To avoid confusion, let's use the right names in the documentation.
No change to the API, only the documentation is involved.
Signed-off-by: Stefano Garzarella <sgarzare@redhat.com>
Message-Id: <20250303085237.19990-1-sgarzare@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
|
