The V4L2 subdevs have managed without centralized locking for the state
(previously pad_config), as the try-state is supposedly safe (although I
believe two TRY ioctls for the same fd would race), and the
active-state, and its locking, is managed by the drivers internally.
We now have active-state in a centralized position, and need locking.
Strictly speaking the locking is only needed for new drivers that use
the new state, as the current drivers continue behaving as they used to.
However, active-state locking is complicated by the fact that currently
the real active-state of a subdev is split into multiple parts: the new
v4l2_subdev_state, subdev control state, and subdev's internal state.
In the future all these three states should be combined into one state
(the v4l2_subdev_state), and then a single lock for the state should be
sufficient.
But to solve the current split-state situation we need to share locks
between the three states. This is accomplished by using the same lock
management as the control handler does: we use a pointer to a mutex,
allowing the driver to override the default mutex. Thus the driver can
do e.g.:
sd->state_lock = sd->ctrl_handler->lock;
before calling v4l2_subdev_init_finalize(), resulting in sharing the
same lock between the states and the controls.
The locking model for active-state is such that any subdev op that gets
the state as a parameter expects the state to be already locked by the
caller, and expects the caller to release the lock.
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ideasonboard.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@kernel.org>
The subdev state is now used for both try and active cases. Rename
rename v4l2_subdev_get_try_* helpers to v4l2_subdev_get_pad_*.
Temporary wapper helper macros are added to keep the drivers using
v4l2_subdev_get_try_* compiling. The next step is to change the uses
in th drivers, and then drop the helpers.
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ideasonboard.com>
Reviewed-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@kernel.org>
Add a new 'active_state' field to struct v4l2_subdev to which we can
store the active state of a subdev. This will place the subdev
configuration into a known place, allowing us to use the state directly
from the v4l2 framework, thus simplifying the drivers.
Also add functions v4l2_subdev_init_finalize() and
v4l2_subdev_cleanup(), which will allocate and free the active state.
The functions are named in a generic way so that they can be also used
for other subdev initialization work.
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ideasonboard.com>
Reviewed-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Reviewed-by: Jacopo Mondi <jacopo+renesas@jmondi.org>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@kernel.org>
v4l2_subdev_alloc_state() and v4l2_subdev_free_state() are not supposed
to be used by the drivers. However, we do have a few drivers that use
those at the moment, so we need to expose these functions for the time
being.
Prefix the functions with __ to mark the functions as internal.
At the same time, rename them to v4l2_subdev_state_alloc and
v4l2_subdev_state_free to match the style used for other functions like
video_device_alloc() and media_request_alloc().
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ideasonboard.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Reviewed-by: Jacopo Mondi <jacopo@jmondi.org>
Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@kernel.org>
Set bus_info field based on struct device in media_device_init() and
remove corresponding code from drivers.
Also update media_device_init() documentation: the dev field must be now
initialised before calling it.
Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@kernel.org>
The bus_info or a similar field exists in a lot of structs, yet drivers
tend to set the value of that field by themselves in a determinable way.
Thus provide a helper for doing this. To be used in subsequent patches.
Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@kernel.org>
The documentation for media_device_init() had several references to
(struct) media_entity where it should have referred to struct media_device
instead. Fix this.
Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@kernel.org>
Remove redundant kerneldoc documentation in mc-device.c. The functions are
already documented in media-device.h, where non-redundant documentation is
also moved.
Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@kernel.org>
To describe in the kernel the connection between devices and their
supporting peripherals (for example, a camera sensor and the vcm
driving the focusing lens for it), add a new type of media link
to introduce the concept of these ancillary links.
Add some elements to the uAPI documentation to explain the new link
type, their purpose and some aspects of their current implementation.
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Daniel Scally <djrscally@gmail.com>
Reviewed-by: Jean-Michel Hautbois <jeanmichel.hautbois@ideasonboard.com>
Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@kernel.org>
This new optional callback is called when the adapter is fully configured
or fully unconfigured. Some drivers may have to take action when this
happens.
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab@kernel.org>
Allow drivers to change the transmit timeout value, i.e. after how
long should a transmit be considered 'lost', i.e. the corresponding
cec_transmit_done_ts was never called.
Some CEC devices have their own timeout, and so this timeout value must be
longer than that hardware timeout value. If it is shorter then the
framework would consider the transmit lost, even though it is effectively
still in progress at the hardware level.
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab@kernel.org>
These two helper functions return true if the received message
contains the result of a previous non-blocking transmit. Either
the tx_status result (cec_msg_recv_is_tx_result) of the transmit,
or the rx_status result (cec_msg_recv_is_rx_result) of the reply
to the original transmit.
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab@kernel.org>
If a transmit-in-progress was canceled, then, once the transmit
is done, mark it as aborted and refrain from retrying the transmit.
To signal this situation the new transmit_in_progress_aborted field is
set to true.
The old implementation would just set adap->transmitting to NULL and
set adap->transmit_in_progress to false, but on the hardware level
the transmit was still ongoing. However, the framework would think
the transmit was aborted, and if a new transmit was issued, then
it could overwrite the HW buffer containing the old transmit with the
new transmit, leading to garbled data on the CEC bus.
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab@kernel.org>
Don't enable/disable the adapter if the first fh is opened or the
last fh is closed, instead do this when the adapter is configured
or unconfigured, and also when we enter Monitor All or Monitor Pin
mode for the first time or we exit the Monitor All/Pin mode for the
last time.
However, if needs_hpd is true, then do this when the physical
address is set or cleared: in that case the adapter typically is
powered by the HPD, so it really is disabled when the HPD is low.
This case (needs_hpd is true) was already handled in this way, so
this wasn't changed.
The problem with the old behavior was that if the HPD goes low when
no fh is open, and a transmit was in progress, then the adapter would
be disabled, typically stopping the transmit immediately which
leaves a partial message on the bus, which isn't nice and can confuse
some adapters.
It makes much more sense to disable it only when the adapter is
unconfigured and we're not monitoring the bus, since then you really
won't be using it anymore.
To keep track of this store a CEC activation count and call adap_enable
only when it goes from 0 to 1 or back to 0.
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab@kernel.org>
Pull gpio fixes from Bartosz Golaszewski:
"A single fix for gpio-sim and two patches for GPIO ACPI pulled from
Andy:
- fix the set/get_multiple() callbacks in gpio-sim
- use correct format characters in gpiolib-acpi
- use an unsigned type for pins in gpiolib-acpi"
* tag 'gpio-fixes-for-v5.18-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/brgl/linux:
gpio: sim: fix setting and getting multiple lines
gpiolib: acpi: Convert type for pin to be unsigned
gpiolib: acpi: use correct format characters
Pull random number generator fixes from Jason Donenfeld:
- Per your suggestion, random reads now won't fail if there's a page
fault after some non-zero amount of data has been read, which makes
the behavior consistent with all other reads in the kernel.
- Rather than an inconsistent mix of random_get_entropy() returning an
unsigned long or a cycles_t, now it just returns an unsigned long.
- A memcpy() was replaced with an memmove(), because the addresses are
sometimes overlapping. In practice the destination is always before
the source, so not really an issue, but better to be correct than
not.
* tag 'random-5.18-rc3-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/crng/random:
random: use memmove instead of memcpy for remaining 32 bytes
random: make random_get_entropy() return an unsigned long
random: allow partial reads if later user copies fail
Pull SCSI fixes from James Bottomley:
"13 fixes, all in drivers.
The most extensive changes are in the iscsi series (affecting drivers
qedi, cxgbi and bnx2i), the next most is scsi_debug, but that's just a
simple revert and then minor updates to pm80xx"
* tag 'scsi-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi:
scsi: iscsi: MAINTAINERS: Add Mike Christie as co-maintainer
scsi: qedi: Fix failed disconnect handling
scsi: iscsi: Fix NOP handling during conn recovery
scsi: iscsi: Merge suspend fields
scsi: iscsi: Fix unbound endpoint error handling
scsi: iscsi: Fix conn cleanup and stop race during iscsid restart
scsi: iscsi: Fix endpoint reuse regression
scsi: iscsi: Release endpoint ID when its freed
scsi: iscsi: Fix offload conn cleanup when iscsid restarts
scsi: iscsi: Move iscsi_ep_disconnect()
scsi: pm80xx: Enable upper inbound, outbound queues
scsi: pm80xx: Mask and unmask upper interrupt vectors 32-63
Revert "scsi: scsi_debug: Address races following module load"
intel-gpio for v5.18-2
* Couple of fixes related to handling unsigned value of the pin from ACPI
gpiolib:
- acpi: Convert type for pin to be unsigned
- acpi: use correct format characters
Merge misc fixes from Andrew Morton:
"14 patches.
Subsystems affected by this patch series: MAINTAINERS, binfmt, and
mm (tmpfs, secretmem, kasan, kfence, pagealloc, zram, compaction,
hugetlb, vmalloc, and kmemleak)"
* emailed patches from Andrew Morton <akpm@linux-foundation.org>:
mm: kmemleak: take a full lowmem check in kmemleak_*_phys()
mm/vmalloc: fix spinning drain_vmap_work after reading from /proc/vmcore
revert "fs/binfmt_elf: use PT_LOAD p_align values for static PIE"
revert "fs/binfmt_elf: fix PT_LOAD p_align values for loaders"
hugetlb: do not demote poisoned hugetlb pages
mm: compaction: fix compiler warning when CONFIG_COMPACTION=n
mm: fix unexpected zeroed page mapping with zram swap
mm, page_alloc: fix build_zonerefs_node()
mm, kfence: support kmem_dump_obj() for KFENCE objects
kasan: fix hw tags enablement when KUNIT tests are disabled
irq_work: use kasan_record_aux_stack_noalloc() record callstack
mm/secretmem: fix panic when growing a memfd_secret
tmpfs: fix regressions from wider use of ZERO_PAGE
MAINTAINERS: Broadcom internal lists aren't maintainers
Pull block fixes from Jens Axboe:
- Moving of lower_48_bits() to the block layer and a fix for the
unaligned_be48 added with that originally (Alexander, Keith)
- Fix a bad WARN_ON() for trim size checking (Ming)
- A polled IO timeout fix for null_blk (Ming)
- Silence IO error printing for dead disks (Christoph)
- Compat mode range fix (Khazhismel)
- NVMe pull request via Christoph:
- Tone down the error logging added this merge window a bit
(Chaitanya Kulkarni)
- Quirk devices with non-unique unique identifiers (Christoph)
* tag 'block-5.18-2022-04-15' of git://git.kernel.dk/linux-block:
block: don't print I/O error warning for dead disks
block/compat_ioctl: fix range check in BLKGETSIZE
nvme-pci: disable namespace identifiers for Qemu controllers
nvme-pci: disable namespace identifiers for the MAXIO MAP1002/1202
nvme: add a quirk to disable namespace identifiers
nvme: don't print verbose errors for internal passthrough requests
block: null_blk: end timed out poll request
block: fix offset/size check in bio_trim()
asm-generic: fix __get_unaligned_be48() on 32 bit platforms
block: move lower_48_bits() to block
Pull io_uring fixes from Jens Axboe:
- Ensure we check and -EINVAL any use of reserved or struct padding.
Although we generally always do that, it's missed in two spots for
resource updates, one for the ring fd registration from this merge
window, and one for the extended arg. Make sure we have all of them
handled. (Dylan)
- A few fixes for the deferred file assignment (me, Pavel)
- Add a feature flag for the deferred file assignment so apps can tell
we handle it correctly (me)
- Fix a small perf regression with the current file position fix in
this merge window (me)
* tag 'io_uring-5.18-2022-04-14' of git://git.kernel.dk/linux-block:
io_uring: abort file assignment prior to assigning creds
io_uring: fix poll error reporting
io_uring: fix poll file assign deadlock
io_uring: use right issue_flags for splice/tee
io_uring: verify pad field is 0 in io_get_ext_arg
io_uring: verify resv is 0 in ringfd register/unregister
io_uring: verify that resv2 is 0 in io_uring_rsrc_update2
io_uring: move io_uring_rsrc_update2 validation
io_uring: fix assign file locking issue
io_uring: stop using io_wq_work as an fd placeholder
io_uring: move apoll->events cache
io_uring: io_kiocb_update_pos() should not touch file for non -1 offset
io_uring: flag the fact that linked file assignment is sane
Pull vfio fix from Alex Williamson:
- Fix VF token checking for vfio-pci variant drivers (Jason Gunthorpe)
* tag 'vfio-v5.18-rc3' of https://github.com/awilliam/linux-vfio:
vfio/pci: Fix vf_token mechanism when device-specific VF drivers are used
Pull networking fixes from Paolo Abeni:
"Including fixes from wireless and netfilter.
Current release - regressions:
- smc: fix af_ops of child socket pointing to released memory
- wifi: ath9k: fix usage of driver-private space in tx_info
Previous releases - regressions:
- ipv6: fix panic when forwarding a pkt with no in6 dev
- sctp: use the correct skb for security_sctp_assoc_request
- smc: fix NULL pointer dereference in smc_pnet_find_ib()
- sched: fix initialization order when updating chain 0 head
- phy: don't defer probe forever if PHY IRQ provider is missing
- dsa: revert "net: dsa: setup master before ports"
- dsa: felix: fix tagging protocol changes with multiple CPU ports
- eth: ice:
- fix use-after-free when freeing @rx_cpu_rmap
- revert "iavf: fix deadlock occurrence during resetting VF
interface"
- eth: lan966x: stop processing the MAC entry is port is wrong
Previous releases - always broken:
- sched:
- flower: fix parsing of ethertype following VLAN header
- taprio: check if socket flags are valid
- nfc: add flush_workqueue to prevent uaf
- veth: ensure eth header is in skb's linear part
- eth: stmmac: fix altr_tse_pcs function when using a fixed-link
- eth: macb: restart tx only if queue pointer is lagging
- eth: macvlan: fix leaking skb in source mode with nodst option"
* tag 'net-5.18-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net: (52 commits)
net: bcmgenet: Revert "Use stronger register read/writes to assure ordering"
rtnetlink: Fix handling of disabled L3 stats in RTM_GETSTATS replies
net: dsa: felix: fix tagging protocol changes with multiple CPU ports
tun: annotate access to queue->trans_start
nfc: nci: add flush_workqueue to prevent uaf
net: dsa: realtek: don't parse compatible string for RTL8366S
net: dsa: realtek: fix Kconfig to assure consistent driver linkage
net: ftgmac100: access hardware register after clock ready
Revert "net: dsa: setup master before ports"
macvlan: Fix leaking skb in source mode with nodst option
netfilter: nf_tables: nft_parse_register can return a negative value
net: lan966x: Stop processing the MAC entry is port is wrong.
net: lan966x: Fix when a port's upper is changed.
net: lan966x: Fix IGMP snooping when frames have vlan tag
net: lan966x: Update lan966x_ptp_get_nominal_value
sctp: Initialize daddr on peeled off socket
net/smc: Fix af_ops of child socket pointing to released memory
net/smc: Fix NULL pointer dereference in smc_pnet_find_ib()
net/smc: use memcpy instead of snprintf to avoid out of bounds read
net: macb: Restart tx only if queue pointer is lagging
...
Pull sound fixes from Takashi Iwai:
"This became an unexpectedly large pull request due to various
regression fixes in the previous kernels.
The majority of fixes are a series of patches to address the
regression at probe errors in devres'ed drivers, while there are yet
more fixes for the x86 SG allocations and for USB-audio buffer
management. In addition, a few HD-audio quirks and other small fixes
are found"
* tag 'sound-5.18-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound: (52 commits)
ALSA: usb-audio: Limit max buffer and period sizes per time
ALSA: memalloc: Add fallback SG-buffer allocations for x86
ALSA: nm256: Don't call card private_free at probe error path
ALSA: mtpav: Don't call card private_free at probe error path
ALSA: rme9652: Fix the missing snd_card_free() call at probe error
ALSA: hdspm: Fix the missing snd_card_free() call at probe error
ALSA: hdsp: Fix the missing snd_card_free() call at probe error
ALSA: oxygen: Fix the missing snd_card_free() call at probe error
ALSA: lx6464es: Fix the missing snd_card_free() call at probe error
ALSA: cmipci: Fix the missing snd_card_free() call at probe error
ALSA: aw2: Fix the missing snd_card_free() call at probe error
ALSA: als300: Fix the missing snd_card_free() call at probe error
ALSA: lola: Fix the missing snd_card_free() call at probe error
ALSA: bt87x: Fix the missing snd_card_free() call at probe error
ALSA: sis7019: Fix the missing error handling
ALSA: intel_hdmi: Fix the missing snd_card_free() call at probe error
ALSA: via82xx: Fix the missing snd_card_free() call at probe error
ALSA: sonicvibes: Fix the missing snd_card_free() call at probe error
ALSA: rme96: Fix the missing snd_card_free() call at probe error
ALSA: rme32: Fix the missing snd_card_free() call at probe error
...
Pull fscache fixes from David Howells:
"Here's a collection of fscache and cachefiles fixes and misc small
cleanups. The two main fixes are:
- Add a missing unmark of the inode in-use mark in an error path.
- Fix a KASAN slab-out-of-bounds error when setting the xattr on a
cachefiles volume due to the wrong length being given to memcpy().
In addition, there's the removal of an unused parameter, removal of an
unused Kconfig option, conditionalising a bit of procfs-related stuff
and some doc fixes"
* tag 'fscache-fixes-20220413' of git://git.kernel.org/pub/scm/linux/kernel/git/dhowells/linux-fs:
fscache: remove FSCACHE_OLD_API Kconfig option
fscache: Use wrapper fscache_set_cache_state() directly when relinquishing
fscache: Move fscache_cookies_seq_ops specific code under CONFIG_PROC_FS
fscache: Remove the cookie parameter from fscache_clear_page_bits()
docs: filesystems: caching/backend-api.rst: fix an object withdrawn API
docs: filesystems: caching/backend-api.rst: correct two relinquish APIs use
cachefiles: Fix KASAN slab-out-of-bounds in cachefiles_set_volume_xattr
cachefiles: unmark inode in use in error path
get_pf_vdev() tries to check if a PF is a VFIO PF by looking at the driver:
if (pci_dev_driver(physfn) != pci_dev_driver(vdev->pdev)) {
However now that we have multiple VF and PF drivers this is no longer
reliable.
This means that security tests realted to vf_token can be skipped by
mixing and matching different VFIO PCI drivers.
Instead of trying to use the driver core to find the PF devices maintain a
linked list of all PF vfio_pci_core_device's that we have called
pci_enable_sriov() on.
When registering a VF just search the list to see if the PF is present and
record the match permanently in the struct. PCI core locking prevents a PF
from passing pci_disable_sriov() while VF drivers are attached so the VFIO
owned PF becomes a static property of the VF.
In common cases where vfio does not own the PF the global list remains
empty and the VF's pointer is statically NULL.
This also fixes a lockdep splat from recursive locking of the
vfio_group::device_lock between vfio_device_get_from_name() and
vfio_device_get_from_dev(). If the VF and PF share the same group this
would deadlock.
Fixes: ff53edf6d6 ("vfio/pci: Split the pci_driver code out of vfio_pci_core.c")
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
Link: https://lore.kernel.org/r/0-v3-876570980634+f2e8-vfio_vf_token_jgg@nvidia.com
Signed-off-by: Alex Williamson <alex.williamson@redhat.com>
Some implementations were returning type `unsigned long`, while others
that fell back to get_cycles() were implicitly returning a `cycles_t` or
an untyped constant int literal. That makes for weird and confusing
code, and basically all code in the kernel already handled it like it
was an `unsigned long`. I recently tried to handle it as the largest
type it could be, a `cycles_t`, but doing so doesn't really help with
much.
Instead let's just make random_get_entropy() return an unsigned long all
the time. This also matches the commonly used `arch_get_random_long()`
function, so now RDRAND and RDTSC return the same sized integer, which
means one can fallback to the other more gracefully.
Cc: Dominik Brodowski <linux@dominikbrodowski.net>
Cc: Theodore Ts'o <tytso@mit.edu>
Acked-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
The recent change for memory allocator replaced the SG-buffer handling
helper for x86 with the standard non-contiguous page handler. This
works for most cases, but there is a corner case I obviously
overlooked, namely, the fallback of non-contiguous handler without
IOMMU. When the system runs without IOMMU, the core handler tries to
use the continuous pages with a single SGL entry. It works nicely for
most cases, but when the system memory gets fragmented, the large
allocation may fail frequently.
Ideally the non-contig handler could deal with the proper SG pages,
it's cumbersome to extend for now. As a workaround, here we add new
types for (minimalistic) SG allocations, instead, so that the
allocator falls back to those types automatically when the allocation
with the standard API failed.
BTW, one better (but pretty minor) improvement from the previous
SG-buffer code is that this provides the proper mmap support without
the PCM's page fault handling.
Fixes: 2c95b92ecd ("ALSA: memalloc: Unify x86 SG-buffer handling (take#3)")
BugLink: https://gitlab.freedesktop.org/pipewire/pipewire/-/issues/2272
BugLink: https://bugzilla.suse.com/show_bug.cgi?id=1198248
Cc: <stable@vger.kernel.org>
Link: https://lore.kernel.org/r/20220413054808.7547-1-tiwai@suse.de
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Pull hardening fixes from Kees Cook:
- latent_entropy: Use /dev/urandom instead of small GCC seed (Jason
Donenfeld)
- uapi/stddef.h: add missed include guards (Tadeusz Struk)
* tag 'hardening-v5.18-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/kees/linux:
gcc-plugins: latent_entropy: use /dev/urandom
uapi/linux/stddef.h: Add include guards
Pull nfsd fixes from Chuck Lever:
- Fix a write performance regression
- Fix crashes during request deferral on RDMA transports
* tag 'nfsd-5.18-1' of git://git.kernel.org/pub/scm/linux/kernel/git/cel/linux:
SUNRPC: Fix the svc_deferred_event trace class
SUNRPC: Fix NFSD's request deferral on RDMA transports
nfsd: Clean up nfsd_file_put()
nfsd: Fix a write performance regression
SUNRPC: Return true/false (not 1/0) from bool functions
While testing the new macros for working with 48 bit containers,
I faced a weird problem:
32 + 16: 0x2ef6e8da 0x79e60000
48: 0xffffe8da + 0x79e60000
All the bits starting from the 32nd were getting 1d in 9/10 cases.
The debug showed:
p[0]: 0x00002e0000000000
p[1]: 0x00002ef600000000
p[2]: 0xffffffffe8000000
p[3]: 0xffffffffe8da0000
p[4]: 0xffffffffe8da7900
p[5]: 0xffffffffe8da79e6
that the value becomes a garbage after the third OR, i.e. on
`p[2] << 24`.
When the 31st bit is 1 and there's no explicit cast to an unsigned,
it's being considered as a signed int and getting sign-extended on
OR, so `e8000000` becomes `ffffffffe8000000` and messes up the
result.
Cast the @p[2] to u64 as well to avoid this. Now:
32 + 16: 0x7ef6a490 0xddc10000
48: 0x7ef6a490 + 0xddc10000
p[0]: 0x00007e0000000000
p[1]: 0x00007ef600000000
p[2]: 0x00007ef6a4000000
p[3]: 0x00007ef6a4900000
p[4]: 0x00007ef6a490dd00
p[5]: 0x00007ef6a490ddc1
Fixes: c2ea5fcf53 ("asm-generic: introduce be48 unaligned accessors")
Signed-off-by: Alexander Lobakin <alobakin@pm.me>
Link: https://lore.kernel.org/r/20220412215220.75677-1-alobakin@pm.me
Signed-off-by: Jens Axboe <axboe@kernel.dk>
