Teach ipv6/udp how to use external ubuf_info provided in msghdr and
also prepare it for managed frags by sprinkling
skb_zcopy_downgrade_managed() when it could mix managed and not managed
frags.
Signed-off-by: Pavel Begunkov <asml.silence@gmail.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

Teach ipv4/udp how to use external ubuf_info provided in msghdr and
also prepare it for managed frags by sprinkling
skb_zcopy_downgrade_managed() when it could mix managed and not managed
frags.
Signed-off-by: Pavel Begunkov <asml.silence@gmail.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

Managed pages contain pinned userspace pages and controlled by upper
layers, there is no need in tracking skb->pfmemalloc for them. Introduce
a helper for filling frags but ignoring page tracking, it'll be needed
later.
Signed-off-by: Pavel Begunkov <asml.silence@gmail.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

Some users like io_uring can do page pinning more efficiently, so we
want a way to delegate referencing to other subsystems. For that add
a new flag called SKBFL_MANAGED_FRAG_REFS. When set, skb doesn't hold
page references and upper layers are responsivle to managing page
lifetime.

It's allowed to convert skbs from managed to normal by calling
skb_zcopy_downgrade_managed(). The function will take all needed
page references and clear the flag. It's needed, for instance,
to avoid mixing managed modes.
Signed-off-by: Pavel Begunkov <asml.silence@gmail.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

Add support for custom iov_iter handling to msghdr. The idea is that
in-kernel subsystems want control over how an SG is split.
Signed-off-by: David Ahern <dsahern@kernel.org>
[pavel: move callback into msghdr]
Signed-off-by: Pavel Begunkov <asml.silence@gmail.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

Make possible for network in-kernel callers like io_uring to pass in a
custom ubuf_info by setting it in a new field of struct msghdr.
Signed-off-by: Pavel Begunkov <asml.silence@gmail.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

We don't want to list every single ubuf_info callback in
skb_orphan_frags(), add a flag controlling the behaviour.
Signed-off-by: Pavel Begunkov <asml.silence@gmail.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

We should not append MSG_ZEROCOPY requests to skbuff with non
MSG_ZEROCOPY ubuf_info, they might be not compatible.
Signed-off-by: Pavel Begunkov <asml.silence@gmail.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

Even when zerocopy transmission is requested and possible,
__ip_append_data() will still copy a small chunk of data just because it
allocated some extra linear space (e.g. 128 bytes). It wastes CPU cycles
on copy and iter manipulations and also misalignes potentially aligned
data. Avoid such copies. And as a bonus we can allocate smaller skb.
Signed-off-by: Pavel Begunkov <asml.silence@gmail.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

Even when zerocopy transmission is requested and possible,
__ip_append_data() will still copy a small chunk of data just because it
allocated some extra linear space (e.g. 148 bytes). It wastes CPU cycles
on copy and iter manipulations and also misalignes potentially aligned
data. Avoid such copies. And as a bonus we can allocate smaller skb.
Signed-off-by: Pavel Begunkov <asml.silence@gmail.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

This is a collection of three fixes for small annoyances.

Two of these are already pending in other trees, but I really don't want
to release another -rc with these issues pending, so I picked up the
patches for these things directly.  We'll end up with duplicate commits
eventually, I prefer that over having these issues pending.

The third one is just me getting rid of another BUG_ON() just because it
was reported and I dislike those things so much.

* merge 'hot-fixes' branch:
  ida: don't use BUG_ON() for debugging
  drm/aperture: Run fbdev removal before internal helpers
  ptrace: fix clearing of JOBCTL_TRACED in ptrace_unfreeze_traced()

This is another old BUG_ON() that just shouldn't exist (see also commit
a382f8fe: "signal handling: don't use BUG_ON() for debugging").

In fact, as Matthew Wilcox points out, this condition shouldn't really
even result in a warning, since a negative id allocation result is just
a normal allocation failure:

  "I wonder if we should even warn here -- sure, the caller is trying to
   free something that wasn't allocated, but we don't warn for
   kfree(NULL)"

and goes on to point out how that current error check is only causing
people to unnecessarily do their own index range checking before freeing
it.

This was noted by Itay Iellin, because the bluetooth HCI socket cookie
code does *not* do that range checking, and ends up just freeing the
error case too, triggering the BUG_ON().

The HCI code requires CAP_NET_RAW, and seems to just result in an ugly
splat, but there really is no reason to BUG_ON() here, and we have
generally striven for allocation models where it's always ok to just do

    free(alloc());

even if the allocation were to fail for some random reason (usually
obviously that "random" reason being some resource limit).

Fixes: 88eca020 ("ida: simplified functions for id allocation")
Reported-by: Itay Iellin <ieitayie@gmail.com>
Suggested-by: Matthew Wilcox <willy@infradead.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

Pull dmaengine fixes from Vinod Koul:
 "One core fix for DMA_INTERRUPT and rest driver fixes.

  Core:

   - Revert verification of DMA_INTERRUPT capability as that was
     incorrect

  Bunch of driver fixes for:

   - ti: refcount and put_device leak

   - qcom_bam: runtime pm overflow

   - idxd: force wq context cleanup and call idxd_enable_system_pasid()
     on success

   - dw-axi-dmac: RMW on channel suspend register

   - imx-sdma: restart cyclic channel when enabled

   - at_xdma: error handling for at_xdmac_alloc_desc

   - pl330: lockdep warning

   - lgm: error handling path in probe

   - allwinner: Fix min/max typo in binding"

* tag 'dmaengine-fix-5.19' of git://git.kernel.org/pub/scm/linux/kernel/git/vkoul/dmaengine:
  dt-bindings: dma: allwinner,sun50i-a64-dma: Fix min/max typo
  dmaengine: lgm: Fix an error handling path in intel_ldma_probe()
  dmaengine: pl330: Fix lockdep warning about non-static key
  dmaengine: idxd: Only call idxd_enable_system_pasid() if succeeded in enabling SVA feature
  dmaengine: at_xdma: handle errors of at_xdmac_alloc_desc() correctly
  dmaengine: imx-sdma: only restart cyclic channel when enabled
  dmaengine: dw-axi-dmac: Fix RMW on channel suspend register
  dmaengine: idxd: force wq context cleanup on device disable path
  dmaengine: qcom: bam_dma: fix runtime PM underflow
  dmaengine: imx-sdma: Allow imx8m for imx7 FW revs
  dmaengine: Revert "dmaengine: add verification of DMA_INTERRUPT capability for dmatest"
  dmaengine: ti: Add missing put_device in ti_dra7_xbar_route_allocate
  dmaengine: ti: Fix refcount leak in ti_dra7_xbar_route_allocate

Pull staging driver fix from Greg KH:
 "Here is a single staging driver fix for a reported problem that showed
  up in 5.19-rc1 in the wlan-ng driver. It has been in linux-next for a
  week with no reported problems"

* tag 'staging-5.19-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/staging:
  staging/wlan-ng: get the correct struct hfa384x in work callback

Pull char/misc driver fixes from Greg KH:
 "Here are four small char/misc driver fixes for 5.19-rc6 to resolve
  some reported issues. They only affect two drivers:

   - rtsx_usb: fix for of-reported DMA warning error, the driver was
     handling memory buffers in odd ways, it has now been fixed up to be
     much simpler and correct by Shuah.

   - at25 eeprom driver bugfix for reported problem

  All of these have been in linux-next for a week with no reported
  problems"

* tag 'char-misc-5.19-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc:
  misc: rtsx_usb: set return value in rsp_buf alloc err path
  misc: rtsx_usb: use separate command and response buffers
  misc: rtsx_usb: fix use of dma mapped buffer for usb bulk transfer
  eeprom: at25: Rework buggy read splitting

Pull io_uring fix from Jens Axboe:
 "A single fix for an issue that came up yesterday that we should plug
  for -rc6.

  This is a regression introduced in this cycle"

* tag 'io_uring-5.19-2022-07-09' of git://git.kernel.dk/linux-block:
  io_uring: check that we have a file table when allocating update slots

Merge tag 'kbuild-fixes-v5.19-3' of git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild

Pull Kbuild fixes from Masahiro Yamada:

 - Adjust gen_compile_commands.py to the format change of *.mod files

 - Remove unused macro in scripts/Makefile.modinst

* tag 'kbuild-fixes-v5.19-3' of git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild:
  kbuild: remove unused cmd_none in scripts/Makefile.modinst
  gen_compile_commands: handle multiple lines per .mod file

Pull irq fixes from Borislav Petkov:

 - Gracefully handle failure to request MMIO resources in the GICv3
   driver

 - Make a static key static in the Apple AIC driver

 - Fix the Xilinx intc driver dependency on OF_ADDRESS

* tag 'irq_urgent_for_v5.19_rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  irqchip/apple-aic: Make symbol 'use_fast_ipi' static
  irqchip/xilinx: Add explicit dependency on OF_ADDRESS
  irqchip/gicv3: Handle resource request failure consistently

Pull x86 fixes from Borislav Petkov:

 - Prepare for and clear .brk early in order to address XenPV guests
   failures where the hypervisor verifies page tables and uninitialized
   data in that range leads to bogus failures in those checks

 - Add any potential setup_data entries supplied at boot to the identity
   pagetable mappings to prevent kexec kernel boot failures. Usually,
   this is not a problem for the normal kernel as those mappings are
   part of the initially mapped 2M pages but if kexec gets to allocate
   the second kernel somewhere else, those setup_data entries need to be
   mapped there too.

 - Fix objtool not to discard text references from the __tracepoints
   section so that ENDBR validation still works

 - Correct the setup_data types limit as it is user-visible, before 5.19
   releases

* tag 'x86_urgent_for_v5.19_rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  x86/boot: Fix the setup data types max limit
  x86/ibt, objtool: Don't discard text references from tracepoint section
  x86/compressed/64: Add identity mappings for setup_data entries
  x86: Fix .brk attribute in linker script
  x86: Clear .brk area at early boot
  x86/xen: Use clear_bss() for Xen PV guests

Commit 65ce9c38 ("kbuild: move module strip/compression code into
scripts/Makefile.modinst") added this unused code.

Perhaps, I thought cmd_none was useful for CONFIG_MODULE_COMPRESS_NONE,
but I did not use it after all.
Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
Reviewed-by: Nick Desaulniers <ndesaulniers@google.com>

Commit in Fixes forgot to change the SETUP_TYPE_MAX definition which
contains the highest valid setup data type.

Correct that.

Fixes: 5ea98e01 ("x86/boot: Add Confidential Computing type to setup_data")
Signed-off-by: Borislav Petkov <bp@suse.de>
Link: https://lore.kernel.org/r/ddba81dd-cc92-699c-5274-785396a17fb5@zytor.com

Pull i2c fixes from Wolfram Sang:
 "Two I2C driver bugfixes preventing resource leaks"

* tag 'i2c-for-5.19-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux:
  i2c: cadence: Unregister the clk notifier in error path
  i2c: piix4: Fix a memory leak in the EFCH MMIO support

Always run fbdev removal first to remove simpledrm via sysfb_disable().
This clears the internal state.

The later call to drm_aperture_detach_drivers() then does nothing.
Otherwise, with drm_aperture_detach_drivers() running first, the call to
sysfb_disable() uses inconsistent state.

Example backtrace show below:

  BUG: KASAN: use-after-free in device_del+0x79/0x5f0
  Read of size 8 at addr ffff888108185050 by task systemd-udevd/311
  CPU: 0 PID: 311 Comm: systemd-udevd Tainted: G            E     5.19.0-rc2-1-default+ #1689
  Hardware name: HP ProLiant DL120 G7, BIOS J01 04/21/2011
  Call Trace:
    device_del+0x79/0x5f0
    platform_device_del.part.0+0x19/0xe0
    platform_device_unregister+0x1c/0x30
    sysfb_disable+0x2d/0x70
    remove_conflicting_framebuffers+0x1c/0xf0
    remove_conflicting_pci_framebuffers+0x130/0x1a0
    drm_aperture_remove_conflicting_pci_framebuffers+0x86/0xb0
    mgag200_pci_probe+0x2d/0x140 [mgag200]
Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
Fixes: 873eb3b1 ("fbdev: Disable sysfb device registration when removing conflicting FBs")
Cc: Javier Martinez Canillas <javierm@redhat.com>
Cc: Daniel Vetter <daniel.vetter@ffwll.ch>
Cc: Daniel Vetter <daniel@ffwll.ch>
Cc: Sam Ravnborg <sam@ravnborg.org>
Cc: Helge Deller <deller@gmx.de>
Cc: Thomas Zimmermann <tzimmermann@suse.de>
Cc: Alex Deucher <alexander.deucher@amd.com>
Cc: Zhen Lei <thunder.leizhen@huawei.com>
Cc: Changcheng Deng <deng.changcheng@zte.com.cn>
Reviewed-by: Zack Rusin <zackr@vmware.com>
Reviewed-by: Javier Martinez Canillas <javierm@redhat.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

CI reported the following splat while running the strace testsuite:

  WARNING: CPU: 1 PID: 3570031 at kernel/ptrace.c:272 ptrace_check_attach+0x12e/0x178
  CPU: 1 PID: 3570031 Comm: strace Tainted: G           OE     5.19.0-20220624.rc3.git0.ee819a77d4e7.300.fc36.s390x #1
  Hardware name: IBM 3906 M04 704 (z/VM 7.1.0)
  Call Trace:
   [<00000000ab4b645a>] ptrace_check_attach+0x132/0x178
  ([<00000000ab4b6450>] ptrace_check_attach+0x128/0x178)
   [<00000000ab4b6cde>] __s390x_sys_ptrace+0x86/0x160
   [<00000000ac03fcec>] __do_syscall+0x1d4/0x200
   [<00000000ac04e312>] system_call+0x82/0xb0
  Last Breaking-Event-Address:
   [<00000000ab4ea3c8>] wait_task_inactive+0x98/0x190

This is because JOBCTL_TRACED is set, but the task is not in TASK_TRACED
state. Caused by ptrace_unfreeze_traced() which does:

	task->jobctl &= ~TASK_TRACED

but it should be:

	task->jobctl &= ~JOBCTL_TRACED

Fixes: 31cae1ea ("sched,signal,ptrace: Rework TASK_TRACED, TASK_STOPPED state")
Signed-off-by: Sven Schnelle <svens@linux.ibm.com>
Tested-by: Alexander Gordeev <agordeev@linux.ibm.com>
Acked-by: Oleg Nesterov <oleg@redhat.com>
Acked-by: Peter Zijlstra <peterz@infradead.org>
Cc: Eric Biederman <ebiederm@xmission.com>
Cc: Steven Rostedt <rostedt@goodmis.org>
Cc: Kees Cook <keescook@chromium.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

Pull powerpc fix from Michael Ellerman:

 - On Power8 bare metal, fix creation of RNG platform devices, which are
   needed for the /dev/hwrng driver to probe correctly.

Thanks to Jason A. Donenfeld, and Sachin Sant.

* tag 'powerpc-5.19-5' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux:
  powerpc/powernv: delay rng platform device creation until later in boot

If IORING_FILE_INDEX_ALLOC is set asking for an allocated slot, the
helper doesn't check if we actually have a file table or not. The non
alloc path does do that correctly, and returns -ENXIO if we haven't set
one up.

Do the same for the allocated path, avoiding a NULL pointer dereference
when trying to find a free bit.

Fixes: a7c41b46 ("io_uring: let IORING_OP_FILES_UPDATE support choosing fixed file slots")
Signed-off-by: Jens Axboe <axboe@kernel.dk>

Merge tag 'fscache-fixes-20220708' of git://git.kernel.org/pub/scm/linux/kernel/git/dhowells/linux-fs

Pull fscache fixes from David Howells:

 - Fix a check in fscache_wait_on_volume_collision() in which the
   polarity is reversed. It should complain if a volume is still marked
   acquisition-pending after 20s, but instead complains if the mark has
   been cleared (ie. the condition has cleared).

   Also switch an open-coded test of the ACQUIRE_PENDING volume flag to
   use the helper function for consistency.

 - Not a fix per se, but neaten the code by using a helper to check for
   the DROPPED state.

 - Fix cachefiles's support for erofs to only flush requests associated
   with a released control file, not all requests.

 - Fix a race between one process invalidating an object in the cache
   and another process trying to look it up.

* tag 'fscache-fixes-20220708' of git://git.kernel.org/pub/scm/linux/kernel/git/dhowells/linux-fs:
  fscache: Fix invalidation/lookup race
  cachefiles: narrow the scope of flushed requests when releasing fd
  fscache: Introduce fscache_cookie_is_dropped()
  fscache: Fix if condition in fscache_wait_on_volume_collision()

Pull ACPI fixes from Rafael Wysocki:
 "These fix two recent regressions related to CPPC support.

  Specifics:

   - Prevent _CPC from being used if the platform firmware does not
     confirm CPPC v2 support via _OSC (Mario Limonciello)

   - Allow systems with X86_FEATURE_CPPC set to use _CPC even if CPPC
     support cannot be agreed on via _OSC (Mario Limonciello)"

* tag 'acpi-5.19-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm:
  ACPI: CPPC: Don't require _OSC if X86_FEATURE_CPPC is supported
  ACPI: CPPC: Only probe for _CPC if CPPC v2 is acked

Pull power management fixes from Rafael Wysocki:
 "These fix a NULL pointer dereference in a devfreq driver and a runtime
  PM framework issue that may cause a supplier device to be suspended
  before its consumer.

  Specifics:

   - Fix NULL pointer dereference related to printing a diagnostic
     message in the exynos-bus devfreq driver (Christian Marangi)

   - Fix race condition in the runtime PM framework which in some cases
     may cause a supplier device to be suspended when its consumer is
     still active (Rafael Wysocki)"

* tag 'pm-5.19-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm:
  PM / devfreq: exynos-bus: Fix NULL pointer dereference
  PM: runtime: Fix supplier device management during consumer probe
  PM: runtime: Redefine pm_runtime_release_supplier()

Pull cxl fixes from Vishal Verma:

 - Update MAINTAINERS for Ben's email

 - Fix cleanup of port devices on failure to probe driver

 - Fix endianness in get/set LSA mailbox command structures

 - Fix memregion_free() fallback definition

 - Fix missing variable payload checks in CXL cmd size validation

* tag 'cxl-fixes-for-5.19-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/cxl/cxl:
  cxl/mbox: Fix missing variable payload checks in cmd size validation
  memregion: Fix memregion_free() fallback definition
  cxl/mbox: Use __le32 in get,set_lsa mailbox structures
  cxl/core: Use is_endpoint_decoder
  cxl: Fix cleanup of port devices on failure to probe driver.
  MAINTAINERS: Update Ben's email address

Pull iommu fixes from Joerg Roedel:

 - fix device setup failures in the Intel VT-d driver when the PASID
   table is shared

 - fix Intel VT-d device hot-add failure due to wrong device notifier
   order

 - remove the old IOMMU mailing list from the MAINTAINERS file now that
   it has been retired

* tag 'iommu-fixes-v5.19-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/joro/iommu:
  MAINTAINERS: Remove iommu@lists.linux-foundation.org
  iommu/vt-d: Fix RID2PASID setup/teardown failure
  iommu/vt-d: Fix PCI bus rescan device hot add

Pull gpio fixes from Bartosz Golaszewski:

 - fix a build error in gpio-vf610

 - fix a null-pointer dereference in the GPIO character device code

* tag 'gpio-fixes-for-v5.19-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/brgl/linux:
  gpiolib: cdev: fix null pointer dereference in linereq_free()
  gpio: vf610: fix compilation error

Merge a runtime PM framework cleanup and fix related to device links.

* pm-core:
  PM: runtime: Fix supplier device management during consumer probe
  PM: runtime: Redefine pm_runtime_release_supplier()

Pull block fixes from Jens Axboe:
 "NVMe pull request with another id quirk addition, and a tracing fix"

* tag 'block-5.19-2022-07-08' of git://git.kernel.dk/linux-block:
  nvme: use struct group for generic command dwords
  nvme-pci: phison e16 has bogus namespace ids

Pull io_uring tweak from Jens Axboe:
 "Just a minor tweak to an addition made in this release cycle: padding
  a 32-bit value that's in a 64-bit union to avoid any potential
  funkiness from that"

* tag 'io_uring-5.19-2022-07-08' of git://git.kernel.dk/linux-block:
  io_uring: explicit sqe padding for ioctl commands

Pull fbdev fixes from Helge Deller:

 - fbcon now prevents switching to screen resolutions which are smaller
   than the font size, and prevents enabling a font which is bigger than
   the current screen resolution. This fixes vmalloc-out-of-bounds
   accesses found by KASAN.

 - Guiling Deng fixed a bug where the centered fbdev logo wasn't
   displayed correctly if the screen size matched the logo size.

 - Hsin-Yi Wang provided a patch to include errno.h to fix build when
   CONFIG_OF isn't enabled.

* tag 'for-5.19/fbdev-3' of git://git.kernel.org/pub/scm/linux/kernel/git/deller/linux-fbdev:
  fbcon: Use fbcon_info_from_console() in fbcon_modechange_possible()
  fbmem: Check virtual screen sizes in fb_set_var()
  fbcon: Prevent that screen size is smaller than font size
  fbcon: Disallow setting font bigger than screen size
  video: of_display_timing.h: include errno.h
  fbdev: fbmem: Fix logo center image dx issue

The IOMMU mailing list has moved to iommu@lists.linux.dev
and the old list should bounce by now. Remove it from the
MAINTAINERS file.

Cc: stable@vger.kernel.org
Signed-off-by: Joerg Roedel <jroedel@suse.de>
Link: https://lore.kernel.org/r/20220706103331.10215-1-joro@8bytes.org

Pull NVMe fixes from Christoph:

"nvme fixes for Linux 5.19

 - another bogus identifier quirk (Keith Busch)
 - use struct group in the tracer to avoid a gcc warning (Keith Busch)"

* tag 'nvme-5.19-2022-07-07' of git://git.infradead.org/nvme:
  nvme: use struct group for generic command dwords
  nvme-pci: phison e16 has bogus namespace ids

32 bit sqe->cmd_op is an union with 64 bit values. It's always a good
idea to do padding explicitly. Also zero check it in prep, so it can be
used in the future if needed without compatibility concerns.
Signed-off-by: Pavel Begunkov <asml.silence@gmail.com>
Link: https://lore.kernel.org/r/e6b95a05e970af79000435166185e85b196b2ba2.1657202417.git.asml.silence@gmail.com
[axboe: turn bitwise OR into logical variant]
Signed-off-by: Jens Axboe <axboe@kernel.dk>