Since bit 57 was exported for uffd-wp write-protected (commit
fb8e37f3: "mm/pagemap: export uffd-wp protection information"),
fixing it can reduce some unnecessary confusion.

Link: https://lkml.kernel.org/r/20220301044538.3042713-1-yun.zhou@windriver.com


Fixes: fb8e37f3 ("mm/pagemap: export uffd-wp protection information")
Signed-off-by: Yun Zhou <yun.zhou@windriver.com>
Reviewed-by: Peter Xu <peterx@redhat.com>
Cc: Jonathan Corbet <corbet@lwn.net>
Cc: Tiberiu A Georgescu <tiberiu.georgescu@nutanix.com>
Cc: Florian Schmidt <florian.schmidt@nutanix.com>
Cc: Ivan Teterevkov <ivan.teterevkov@nutanix.com>
Cc: SeongJae Park <sj@kernel.org>
Cc: Yang Shi <shy828301@gmail.com>
Cc: David Hildenbrand <david@redhat.com>
Cc: Axel Rasmussen <axelrasmussen@google.com>
Cc: Miaohe Lin <linmiaohe@huawei.com>
Cc: Andrea Arcangeli <aarcange@redhat.com>
Cc: Colin Cross <ccross@google.com>
Cc: Alistair Popple <apopple@nvidia.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

The error message when I build vm tests on debian10 (GLIBC 2.28):

    userfaultfd.c: In function `userfaultfd_pagemap_test':
    userfaultfd.c:1393:37: error: `MADV_PAGEOUT' undeclared (first use
    in this function); did you mean `MADV_RANDOM'?
      if (madvise(area_dst, test_pgsize, MADV_PAGEOUT))
                                         ^~~~~~~~~~~~
                                         MADV_RANDOM

This patch includes these newer definitions from UAPI linux/mman.h, is
useful to fix tests build on systems without these definitions in glibc
sys/mman.h.

Link: https://lkml.kernel.org/r/20220227055330.43087-2-zhouchengming@bytedance.com


Signed-off-by: Chengming Zhou <zhouchengming@bytedance.com>
Reviewed-by: Shuah Khan <skhan@linuxfoundation.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

Wangyong reports: after enabling tmpfs filesystem to support transparent
hugepage with the following command:

  echo always > /sys/kernel/mm/transparent_hugepage/shmem_enabled

the docker program tries to add F_SEAL_WRITE through the following
command, but it fails unexpectedly with errno EBUSY:

  fcntl(5, F_ADD_SEALS, F_SEAL_WRITE) = -1.

That is because memfd_tag_pins() and memfd_wait_for_pins() were never
updated for shmem huge pages: checking page_mapcount() against
page_count() is hopeless on THP subpages - they need to check
total_mapcount() against page_count() on THP heads only.

Make memfd_tag_pins() (compared > 1) as strict as memfd_wait_for_pins()
(compared != 1): either can be justified, but given the non-atomic
total_mapcount() calculation, it is better now to be strict.  Bear in
mind that total_mapcount() itself scans all of the THP subpages, when
choosing to take an XA_CHECK_SCHED latency break.

Also fix the unlikely xa_is_value() case in memfd_wait_for_pins(): if a
page has been swapped out since memfd_tag_pins(), then its refcount must
have fallen, and so it can safely be untagged.

Link: https://lkml.kernel.org/r/a4f79248-df75-2c8c-3df-ba3317ccb5da@google.com


Signed-off-by: Hugh Dickins <hughd@google.com>
Reported-by: Zeal Robot <zealci@zte.com.cn>
Reported-by: wangyong <wang.yong12@zte.com.cn>
Cc: Mike Kravetz <mike.kravetz@oracle.com>
Cc: Matthew Wilcox (Oracle) <willy@infradead.org>
Cc: CGEL ZTE <cgel.zte@gmail.com>
Cc: Kirill A. Shutemov <kirill@shutemov.name>
Cc: Song Liu <songliubraving@fb.com>
Cc: Yang Yang <yang.yang29@zte.com.cn>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

When adjacent vmas are being merged it can result in the vma that was
originally passed to madvise_update_vma being destroyed.  In the current
implementation, the name parameter passed to madvise_update_vma points
directly to vma->anon_name and it is used after the call to vma_merge.
In the cases when vma_merge merges the original vma and destroys it,
this might result in UAF.  For that the original vma would have to hold
the anon_vma_name with the last reference.  The following vma would need
to contain a different anon_vma_name object with the same string.  Such
scenario is shown below:

madvise_vma_behavior(vma)
  madvise_update_vma(vma, ..., anon_name == vma->anon_name)
    vma_merge(vma)
      __vma_adjust(vma) <-- merges vma with adjacent one
        vm_area_free(vma) <-- frees the original vma
    replace_vma_anon_name(anon_name) <-- UAF of vma->anon_name

Fix this by raising the name refcount and stabilizing it.

Link: https://lkml.kernel.org/r/20220224231834.1481408-3-surenb@google.com
Link: https://lkml.kernel.org/r/20220223153613.835563-3-surenb@google.com


Fixes: 9a10064f ("mm: add a field to store names for private anonymous memory")
Signed-off-by: Suren Baghdasaryan <surenb@google.com>
Reported-by:  <syzbot+aa7b3d4b35f9dc46a366@syzkaller.appspotmail.com>
Acked-by: Michal Hocko <mhocko@suse.com>
Cc: Alexey Gladkov <legion@kernel.org>
Cc: Chris Hyser <chris.hyser@oracle.com>
Cc: Christian Brauner <brauner@kernel.org>
Cc: Colin Cross <ccross@google.com>
Cc: Cyrill Gorcunov <gorcunov@gmail.com>
Cc: Dave Hansen <dave.hansen@intel.com>
Cc: David Hildenbrand <david@redhat.com>
Cc: Davidlohr Bueso <dave@stgolabs.net>
Cc: "Eric W. Biederman" <ebiederm@xmission.com>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Cc: Kees Cook <keescook@chromium.org>
Cc: "Kirill A. Shutemov" <kirill.shutemov@linux.intel.com>
Cc: Matthew Wilcox <willy@infradead.org>
Cc: Michal Hocko <mhocko@suse.com>
Cc: Peter Collingbourne <pcc@google.com>
Cc: Sasha Levin <sashal@kernel.org>
Cc: Sumit Semwal <sumit.semwal@linaro.org>
Cc: Vlastimil Babka <vbabka@suse.cz>
Cc: Xiaofeng Cao <caoxiaofeng@yulong.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

A deep process chain with many vmas could grow really high.  With
default sysctl_max_map_count (64k) and default pid_max (32k) the max
number of vmas in the system is 2147450880 and the refcounter has
headroom of 1073774592 before it reaches REFCOUNT_SATURATED
(3221225472).

Therefore it's unlikely that an anonymous name refcounter will overflow
with these defaults.  Currently the max for pid_max is PID_MAX_LIMIT
(4194304) and for sysctl_max_map_count it's INT_MAX (2147483647).  In
this configuration anon_vma_name refcount overflow becomes theoretically
possible (that still require heavy sharing of that anon_vma_name between
processes).

kref refcounting interface used in anon_vma_name structure will detect a
counter overflow when it reaches REFCOUNT_SATURATED value but will only
generate a warning and freeze the ref counter.  This would lead to the
refcounted object never being freed.  A determined attacker could leak
memory like that but it would be rather expensive and inefficient way to
do so.

To ensure anon_vma_name refcount does not overflow, stop anon_vma_name
sharing when the refcount reaches REFCOUNT_MAX (2147483647), which still
leaves INT_MAX/2 (1073741823) values before the counter reaches
REFCOUNT_SATURATED.  This should provide enough headroom for raising the
refcounts temporarily.

Link: https://lkml.kernel.org/r/20220223153613.835563-2-surenb@google.com


Signed-off-by: Suren Baghdasaryan <surenb@google.com>
Suggested-by: Michal Hocko <mhocko@suse.com>
Acked-by: Michal Hocko <mhocko@suse.com>
Cc: Alexey Gladkov <legion@kernel.org>
Cc: Chris Hyser <chris.hyser@oracle.com>
Cc: Christian Brauner <brauner@kernel.org>
Cc: Colin Cross <ccross@google.com>
Cc: Cyrill Gorcunov <gorcunov@gmail.com>
Cc: Dave Hansen <dave.hansen@intel.com>
Cc: David Hildenbrand <david@redhat.com>
Cc: Davidlohr Bueso <dave@stgolabs.net>
Cc: "Eric W. Biederman" <ebiederm@xmission.com>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Cc: Kees Cook <keescook@chromium.org>
Cc: "Kirill A. Shutemov" <kirill.shutemov@linux.intel.com>
Cc: Matthew Wilcox <willy@infradead.org>
Cc: Peter Collingbourne <pcc@google.com>
Cc: Sasha Levin <sashal@kernel.org>
Cc: Sumit Semwal <sumit.semwal@linaro.org>
Cc: Vlastimil Babka <vbabka@suse.cz>
Cc: Xiaofeng Cao <caoxiaofeng@yulong.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

Avoid mixing strings and their anon_vma_name referenced pointers by
using struct anon_vma_name whenever possible.  This simplifies the code
and allows easier sharing of anon_vma_name structures when they
represent the same name.

[surenb@google.com: fix comment]

Link: https://lkml.kernel.org/r/20220223153613.835563-1-surenb@google.com
Link: https://lkml.kernel.org/r/20220224231834.1481408-1-surenb@google.com


Signed-off-by: Suren Baghdasaryan <surenb@google.com>
Suggested-by: Matthew Wilcox <willy@infradead.org>
Suggested-by: Michal Hocko <mhocko@suse.com>
Acked-by: Michal Hocko <mhocko@suse.com>
Cc: Colin Cross <ccross@google.com>
Cc: Sumit Semwal <sumit.semwal@linaro.org>
Cc: Dave Hansen <dave.hansen@intel.com>
Cc: Kees Cook <keescook@chromium.org>
Cc: "Kirill A. Shutemov" <kirill.shutemov@linux.intel.com>
Cc: Vlastimil Babka <vbabka@suse.cz>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Cc: "Eric W. Biederman" <ebiederm@xmission.com>
Cc: Christian Brauner <brauner@kernel.org>
Cc: Alexey Gladkov <legion@kernel.org>
Cc: Sasha Levin <sashal@kernel.org>
Cc: Chris Hyser <chris.hyser@oracle.com>
Cc: Davidlohr Bueso <dave@stgolabs.net>
Cc: Peter Collingbourne <pcc@google.com>
Cc: Xiaofeng Cao <caoxiaofeng@yulong.com>
Cc: David Hildenbrand <david@redhat.com>
Cc: Cyrill Gorcunov <gorcunov@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

The hugepage-mremap test will create a file in a hugetlb filesystem.  In
a default 'run_vmtests' run, the file will contain all the hugetlb
pages.  After the test, the file remains and there are no free hugetlb
pages for subsequent tests.  This causes those hugetlb tests to fail.

Change hugepage-mremap to take the name of the hugetlb file as an
argument.  Unlink the file within the test, and just to be sure remove
the file in the run_vmtests script.

Link: https://lkml.kernel.org/r/20220201033459.156944-1-mike.kravetz@oracle.com


Signed-off-by: Mike Kravetz <mike.kravetz@oracle.com>
Reviewed-by: Shuah Khan <skhan@linuxfoundation.org>
Acked-by: Yosry Ahmed <yosryahmed@google.com>
Reviewed-by: Muchun Song <songmuchun@bytedance.com>
Reviewed-by: Mina Almasry <almasrymina@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

Pull RISC-V fixes from Palmer Dabbelt:

 - Fixes for a handful of KASAN-related crashes.

 - A fix to avoid a crash during boot for SPARSEMEM &&
   !SPARSEMEM_VMEMMAP configurations.

 - A fix to stop reporting some incorrect errors under DEBUG_VIRTUAL.

 - A fix for the K210's device tree to properly populate the interrupt
   map, so hart1 will get interrupts again.

* tag 'riscv-for-linus-5.17-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/riscv/linux:
  riscv: dts: k210: fix broken IRQs on hart1
  riscv: Fix kasan pud population
  riscv: Move high_memory initialization to setup_bootmem
  riscv: Fix config KASAN && DEBUG_VIRTUAL
  riscv: Fix DEBUG_VIRTUAL false warnings
  riscv: Fix config KASAN && SPARSEMEM && !SPARSE_VMEMMAP
  riscv: Fix is_linear_mapping with recent move of KASAN region

Pull iommu fixes from Joerg Roedel:

 - Fix a double list_add() in Intel VT-d code

 - Add missing put_device() in Tegra SMMU driver

 - Two AMD IOMMU fixes:
     - Memory leak in IO page-table freeing code
     - Add missing recovery from event-log overflow

* tag 'iommu-fixes-v5.17-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/joro/iommu:
  iommu/tegra-smmu: Fix missing put_device() call in tegra_smmu_find
  iommu/vt-d: Fix double list_add when enabling VMD in scalable mode
  iommu/amd: Fix I/O page table memory leak
  iommu/amd: Recover from event log overflow

Pull thermal control fix from Rafael Wysocki:
 "Fix NULL pointer dereference in the thermal netlink interface (Nicolas
  Cavallari)"

* tag 'thermal-5.17-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm:
  thermal: core: Fix TZ_GET_TRIP NULL pointer dereference

Pull sound fixes from Takashi Iwai:
 "Hopefully the last PR for 5.17, including just a few small changes:
  an additional fix for ASoC ops boundary check and other minor
  device-specific fixes"

* tag 'sound-5.17-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound:
  ALSA: intel_hdmi: Fix reference to PCM buffer address
  ASoC: cs4265: Fix the duplicated control name
  ASoC: ops: Shift tested values in snd_soc_put_volsw() by +min

Pull drm fixes from Dave Airlie:
 "Things are quieting down as expected, just a small set of fixes, i915,
  exynos, amdgpu, vrr, bridge and hdlcd. Nothing scary at all.

  i915:
   - Fix GuC SLPC unset command
   - Fix misidentification of some Apple MacBook Pro laptops as Jasper Lake

  amdgpu:
   - Suspend regression fix

  exynos:
   - irq handling fixes
   - Fix two regressions to TE-gpio handling

  arm/hdlcd:
   - Select DRM_GEM_CMEA_HELPER for HDLCD

  bridge:
   - ti-sn65dsi86: Properly undo autosuspend

  vrr:
   - Fix potential NULL-pointer deref"

* tag 'drm-fixes-2022-03-04' of git://anongit.freedesktop.org/drm/drm:
  drm/amdgpu: fix suspend/resume hang regression
  drm/vrr: Set VRR capable prop only if it is attached to connector
  drm/arm: arm hdlcd select DRM_GEM_CMA_HELPER
  drm/bridge: ti-sn65dsi86: Properly undo autosuspend
  drm/i915: s/JSP2/ICP2/ PCH
  drm/i915/guc/slpc: Correct the param count for unset param
  drm/exynos: Search for TE-gpio in DSI panel's node
  drm/exynos: Don't fail if no TE-gpio is defined for DSI driver
  drm/exynos: gsc: Use platform_get_irq() to get the interrupt
  drm/exynos/fimc: Use platform_get_irq() to get the interrupt
  drm/exynos/exynos_drm_fimd: Use platform_get_irq_byname() to get the interrupt
  drm/exynos: mixer: Use platform_get_irq() to get the interrupt
  drm/exynos/exynos7_drm_decon: Use platform_get_irq_byname() to get the interrupt

Pull pin control fixes from Linus Walleij:
 "These two fixes should fix the issues seen on the OrangePi, first we
  needed the correct offset when calling pinctrl_gpio_direction(), and
  fixing that made a lockdep issue explode in our face. Both now fixed"

* tag 'pinctrl-v5.17-3' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-pinctrl:
  pinctrl: sunxi: Use unique lockdep classes for IRQs
  pinctrl-sunxi: sunxi_pinctrl_gpio_direction_in/output: use correct offset

syzkaller was recently triggering an oversized kvmalloc() warning via
xdp_umem_create().

The triggered warning was added back in 7661809d ("mm: don't allow
oversized kvmalloc() calls"). The rationale for the warning for huge
kvmalloc sizes was as a reaction to a security bug where the size was
more than UINT_MAX but not everything was prepared to handle unsigned
long sizes.

Anyway, the AF_XDP related call trace from this syzkaller report was:

  kvmalloc include/linux/mm.h:806 [inline]
  kvmalloc_array include/linux/mm.h:824 [inline]
  kvcalloc include/linux/mm.h:829 [inline]
  xdp_umem_pin_pages net/xdp/xdp_umem.c:102 [inline]
  xdp_umem_reg net/xdp/xdp_umem.c:219 [inline]
  xdp_umem_create+0x6a5/0xf00 net/xdp/xdp_umem.c:252
  xsk_setsockopt+0x604/0x790 net/xdp/xsk.c:1068
  __sys_setsockopt+0x1fd/0x4e0 net/socket.c:2176
  __do_sys_setsockopt net/socket.c:2187 [inline]
  __se_sys_setsockopt net/socket.c:2184 [inline]
  __x64_sys_setsockopt+0xb5/0x150 net/socket.c:2184
  do_syscall_x64 arch/x86/entry/common.c:50 [inline]
  do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80
  entry_SYSCALL_64_after_hwframe+0x44/0xae

Björn mentioned that requests for >2GB allocation can still be valid:

  The structure that is being allocated is the page-pinning accounting.
  AF_XDP has an internal limit of U32_MAX pages, which is *a lot*, but
  still fewer than what memcg allows (PAGE_COUNTER_MAX is a LONG_MAX/
  PAGE_SIZE on 64 bit systems). [...]

  I could just change from U32_MAX to INT_MAX, but as I stated earlier
  that has a hacky feeling to it. [...] From my perspective, the code
  isn't broken, with the memcg limits in consideration. [...]

Linus says:

  [...] Pretty much every time this has come up, the kernel warning has
  shown that yes, the code was broken and there really wasn't a reason
  for doing allocations that big.

  Of course, some people would be perfectly fine with the allocation
  failing, they just don't want the warning. I didn't want __GFP_NOWARN
  to shut it up originally because I wanted people to see all those
  cases, but these days I think we can just say "yeah, people can shut
  it up explicitly by saying 'go ahead and fail this allocation, don't
  warn about it'".

  So enough time has passed that by now I'd certainly be ok with [it].

Thus allow call-sites to silence such userspace triggered splats if the
allocation requests have __GFP_NOWARN. For xdp_umem_pin_pages()'s call
to kvcalloc() this is already the case, so nothing else needed there.

Fixes: 7661809d ("mm: don't allow oversized kvmalloc() calls")
Reported-by:  <syzbot+11421fbbff99b989670e@syzkaller.appspotmail.com>
Suggested-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Tested-by:  <syzbot+11421fbbff99b989670e@syzkaller.appspotmail.com>
Cc: Björn Töpel <bjorn@kernel.org>
Cc: Magnus Karlsson <magnus.karlsson@intel.com>
Cc: Willy Tarreau <w@1wt.eu>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Alexei Starovoitov <ast@kernel.org>
Cc: Andrii Nakryiko <andrii@kernel.org>
Cc: Jakub Kicinski <kuba@kernel.org>
Cc: David S. Miller <davem@davemloft.net>
Link: https://lore.kernel.org/bpf/CAJ+HfNhyfsT5cS_U9EC213ducHs9k9zNxX9+abqC0kTrPbQ0gg@mail.gmail.com
Link: https://lore.kernel.org/bpf/20211201202905.b9892171e3f5b9a60f9da251@linux-foundation.org


Reviewed-by: Leon Romanovsky <leonro@nvidia.com>
Ackd-by: Michal Hocko <mhocko@suse.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

Commit 67d96729 ("riscv: Update Canaan Kendryte K210 device tree")
incorrectly removed two entries from the PLIC interrupt-controller node's
interrupts-extended property.

The PLIC driver cannot know the mapping between hart contexts and hart ids,
so this information has to be provided by device tree, as specified by the
PLIC device tree binding.

The PLIC driver uses the interrupts-extended property, and initializes the
hart context registers in the exact same order as provided by the
interrupts-extended property.

In other words, if we don't specify the S-mode interrupts, the PLIC driver
will simply initialize the hart0 S-mode hart context with the hart1 M-mode
configuration. It is therefore essential to specify the S-mode IRQs even
though the system itself will only ever be running in M-mode.

Re-add the S-mode interrupts, so that we get working IRQs on hart1 again.

Cc: <stable@vger.kernel.org>
Fixes: 67d96729 ("riscv: Update Canaan Kendryte K210 device tree")
Signed-off-by: Niklas Cassel <niklas.cassel@wdc.com>
Signed-off-by: Palmer Dabbelt <palmer@rivosinc.com>

 * drm/arm: Select DRM_GEM_CMEA_HELPER for HDLCD
 * drm/bridge: ti-sn65dsi86: Properly undo autosuspend
 * drm/vrr: Fix potential NULL-pointer deref

Signed-off-by: Dave Airlie <airlied@redhat.com>

From: Thomas Zimmermann <tzimmermann@suse.de>
Link: https://patchwork.freedesktop.org/patch/msgid/YiCTGZ8IVCw0ilKK@linux-uq9g

Merge tag 'amd-drm-fixes-5.17-2022-03-02' of https://gitlab.freedesktop.org/agd5f/linux

 into drm-fixes

amd-drm-fixes-5.17-2022-03-02:

amdgpu:
- Suspend regression fix

Signed-off-by: Dave Airlie <airlied@redhat.com>
From: Alex Deucher <alexander.deucher@amd.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20220303045035.5650-1-alexander.deucher@amd.com

Merge tag 'drm-intel-fixes-2022-03-03' of git://anongit.freedesktop.org/drm/drm-intel

 into drm-fixes

- Fix GuC SLPC unset command. (Vinay Belgaumkar)
- Fix misidentification of some Apple MacBook Pro laptops as Jasper Lake. (Ville Syrjälä)

Signed-off-by: Dave Airlie <airlied@redhat.com>
From: Tvrtko Ursulin <tvrtko.ursulin@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/YiCXHiTyCE7TbopG@tursulin-mobl2

In sv48, the kasan inner regions are not aligned on PGDIR_SIZE and then
when we populate the kasan linear mapping region, we clear the kasan
vmalloc region which is in the same PGD.

Fix this by copying the content of the kasan early pud after allocating a
new PGD for the first time.

Fixes: e8a62cc2 ("riscv: Implement sv48 support")
Signed-off-by: Alexandre Ghiti <alexandre.ghiti@canonical.com>
Cc: stable@vger.kernel.org
Signed-off-by: Palmer Dabbelt <palmer@rivosinc.com>

high_memory used to be initialized in mem_init, way after setup_bootmem.
But a call to dma_contiguous_reserve in this function gives rise to the
below warning because high_memory is equal to 0 and is used at the very
beginning at cma_declare_contiguous_nid.

It went unnoticed since the move of the kasan region redefined
KERN_VIRT_SIZE so that it does not encompass -1 anymore.

Fix this by initializing high_memory in setup_bootmem.

------------[ cut here ]------------
virt_to_phys used for non-linear address: ffffffffffffffff (0xffffffffffffffff)
WARNING: CPU: 0 PID: 0 at arch/riscv/mm/physaddr.c:14 __virt_to_phys+0xac/0x1b8
Modules linked in:
CPU: 0 PID: 0 Comm: swapper Not tainted 5.17.0-rc1-00007-ga68b89289e26 #27
Hardware name: riscv-virtio,qemu (DT)
epc : __virt_to_phys+0xac/0x1b8
 ra : __virt_to_phys+0xac/0x1b8
epc : ffffffff80014922 ra : ffffffff80014922 sp : ffffffff84a03c30
 gp : ffffffff85866c80 tp : ffffffff84a3f180 t0 : ffffffff86bce657
 t1 : fffffffef09406e8 t2 : 0000000000000000 s0 : ffffffff84a03c70
 s1 : ffffffffffffffff a0 : 000000000000004f a1 : 00000000000f0000
 a2 : 0000000000000002 a3 : ffffffff8011f408 a4 : 0000000000000000
 a5 : 0000000000000000 a6 : 0000000000f00000 a7 : ffffffff84a03747
 s2 : ffffffd800000000 s3 : ffffffff86ef4000 s4 : ffffffff8467f828
 s5 : fffffff800000000 s6 : 8000000000006800 s7 : 0000000000000000
 s8 : 0000000480000000 s9 : 0000000080038ea0 s10: 0000000000000000
 s11: ffffffffffffffff t3 : ffffffff84a035c0 t4 : fffffffef09406e8
 t5 : fffffffef09406e9 t6 : ffffffff84a03758
status: 0000000000000100 badaddr: 0000000000000000 cause: 0000000000000003
[<ffffffff8322ef4c>] cma_declare_contiguous_nid+0xf2/0x64a
[<ffffffff83212a58>] dma_contiguous_reserve_area+0x46/0xb4
[<ffffffff83212c3a>] dma_contiguous_reserve+0x174/0x18e
[<ffffffff83208fc2>] paging_init+0x12c/0x35e
[<ffffffff83206bd2>] setup_arch+0x120/0x74e
[<ffffffff83201416>] start_kernel+0xce/0x68c
irq event stamp: 0
hardirqs last  enabled at (0): [<0000000000000000>] 0x0
hardirqs last disabled at (0): [<0000000000000000>] 0x0
softirqs last  enabled at (0): [<0000000000000000>] 0x0
softirqs last disabled at (0): [<0000000000000000>] 0x0
---[ end trace 0000000000000000 ]---

Fixes: f7ae0233 ("riscv: Move KASAN mapping next to the kernel mapping")
Signed-off-by: Alexandre Ghiti <alexandre.ghiti@canonical.com>
Cc: stable@vger.kernel.org
Signed-off-by: Palmer Dabbelt <palmer@rivosinc.com>

__virt_to_phys function is called very early in the boot process (ie
kasan_early_init) so it should not be instrumented by KASAN otherwise it
bugs.

Fix this by declaring phys_addr.c as non-kasan instrumentable.

Signed-off-by: Alexandre Ghiti <alexandre.ghiti@canonical.com>
Fixes: 8ad8b727 (riscv: Add KASAN support)
Cc: stable@vger.kernel.org
Signed-off-by: Palmer Dabbelt <palmer@rivosinc.com>

KERN_VIRT_SIZE used to encompass the kernel mapping before it was
redefined when moving the kasan mapping next to the kernel mapping to only
match the maximum amount of physical memory.

Then, kernel mapping addresses that go through __virt_to_phys are now
declared as wrong which is not true, one can use __virt_to_phys on such
addresses.

Fix this by redefining the condition that matches wrong addresses.

Fixes: f7ae0233 ("riscv: Move KASAN mapping next to the kernel mapping")
Signed-off-by: Alexandre Ghiti <alexandre.ghiti@canonical.com>
Cc: stable@vger.kernel.org
Signed-off-by: Palmer Dabbelt <palmer@rivosinc.com>

In order to get the pfn of a struct page* when sparsemem is enabled
without vmemmap, the mem_section structures need to be initialized which
happens in sparse_init.

But kasan_early_init calls pfn_to_page way before sparse_init is called,
which then tries to dereference a null mem_section pointer.

Fix this by removing the usage of this function in kasan_early_init.

Fixes: 8ad8b727 ("riscv: Add KASAN support")
Signed-off-by: Alexandre Ghiti <alexandre.ghiti@canonical.com>
Cc: stable@vger.kernel.org
Signed-off-by: Palmer Dabbelt <palmer@rivosinc.com>

The KASAN region was recently moved between the linear mapping and the
kernel mapping, is_linear_mapping used to check the validity of an
address by using the start of the kernel mapping, which is now wrong.

Fix this by using the maximum size of the physical memory.

Fixes: f7ae0233 ("riscv: Move KASAN mapping next to the kernel mapping")
Signed-off-by: Alexandre Ghiti <alexandre.ghiti@canonical.com>
Cc: stable@vger.kernel.org
Signed-off-by: Palmer Dabbelt <palmer@rivosinc.com>

The patchwork link is dead. It says:

  404: File not found
  The page URL requested (/project/LKML/list/) does not exist.

Remove it.

Signed-off-by: Ammar Faizi <ammarfaizi2@gnuweeb.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

When cachefiles_shorten_object() calls fallocate() to shape the cache
file to match the DIO size, it passes the total file size it wants to
achieve, not the amount of zeros that should be inserted.  Since this is
meant to preallocate that amount of storage for the file, it can cause
the cache to fill up the disk and hit ENOSPC.

Fix this by passing the length actually required to go from the current
EOF to the desired EOF.

Fixes: 7623ed67 ("cachefiles: Implement cookie resize for truncate")
Reported-by: Jeffle Xu <jefflexu@linux.alibaba.com>
Signed-off-by: David Howells <dhowells@redhat.com>
Tested-by: Jeff Layton <jlayton@kernel.org>
Reviewed-by: Jeff Layton <jlayton@kernel.org>
cc: linux-cachefs@redhat.com
Link: https://lore.kernel.org/r/164630854858.3665356.17419701804248490708.stgit@warthog.procyon.org.uk

 # v1
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

Pull networking fixes from Jakub Kicinski:
 "Including fixes from can, xfrm, wifi, bluetooth, and netfilter.

  Lots of various size fixes, the length of the tag speaks for itself.
  Most of the 5.17-relevant stuff comes from xfrm, wifi and bt trees
  which had been lagging as you pointed out previously. But there's also
  a larger than we'd like portion of fixes for bugs from previous
  releases.

  Three more fixes still under discussion, including and xfrm revert for
  uAPI error.

  Current release - regressions:

   - iwlwifi: don't advertise TWT support, prevent FW crash

   - xfrm: fix the if_id check in changelink

   - xen/netfront: destroy queues before real_num_tx_queues is zeroed

   - bluetooth: fix not checking MGMT cmd pending queue, make scanning
     work again

  Current release - new code bugs:

   - mptcp: make SIOCOUTQ accurate for fallback socket

   - bluetooth: access skb->len after null check

   ...

Pull MIPS fixes from Thomas Bogendoerfer:

 - Fix memory detection for MT7621 devices

 - Fix setnocoherentio kernel option

 - Fix warning when CONFIG_SCHED_CORE is enabled

* tag 'mips-fixes-5.17_4' of git://git.kernel.org/pub/scm/linux/kernel/git/mips/linux:
  MIPS: ralink: mt7621: use bitwise NOT instead of logical
  mips: setup: fix setnocoherentio() boolean setting
  MIPS: smp: fill in sibling and core maps earlier
  MIPS: ralink: mt7621: do memory detection on KSEG1

Pull auxdisplay fixes from Miguel Ojeda:
 "A few lcd2s fixes from Andy Shevchenko"

* tag 'auxdisplay-for-linus-v5.17-rc7' of git://github.com/ojeda/linux:
  auxdisplay: lcd2s: Use proper API to free the instance of charlcd object
  auxdisplay: lcd2s: Fix memory leak in ->remove()
  auxdisplay: lcd2s: Fix lcd2s_redefine_char() feature

While investigating on why a synchronize_net() has been added recently
in ipv6_mc_down(), I found that igmp6_event_query() and igmp6_event_report()
might drop skbs in some cases.

Discussion about removing synchronize_net() from ipv6_mc_down()
will happen in a different thread.

Fixes: f185de28 ("mld: add new workqueues for process mld events")
Signed-off-by: Eric Dumazet <edumazet@google.com>
Cc: Taehee Yoo <ap420073@gmail.com>
Cc: Cong Wang <xiyou.wangcong@gmail.com>
Cc: David Ahern <dsahern@kernel.org>
Link: https://lore.kernel.org/r/20220303173728.937869-1-eric.dumazet@gmail.com


Signed-off-by: Jakub Kicinski <kuba@kernel.org>

The blamed commit said one thing but did another. It explains that we
should restore the "return err" to the original "goto out_unwind_tagger",
but instead it replaced it with "goto out_unlock".

When DSA_NOTIFIER_TAG_PROTO fails after the first switch of a
multi-switch tree, the switches would end up not using the same tagging
protocol.

Fixes: 0b0e2ff1 ("net: dsa: restore error path of dsa_tree_change_tag_proto")
Signed-off-by: Vladimir Oltean <vladimir.oltean@nxp.com>
Link: https://lore.kernel.org/r/20220303154249.1854436-1-vladimir.oltean@nxp.com


Signed-off-by: Jakub Kicinski <kuba@kernel.org>

Commit c685c69f ("ixgbe: don't do any AF_XDP zero-copy transmit if
netif is not OK") addressed the ring transient state when
MEM_TYPE_XSK_BUFF_POOL was being configured which in turn caused the
interface to through down/up. Maurice reported that when carrier is not
ok and xsk_pool is present on ring pair, ksoftirqd will consume 100% CPU
cycles due to the constant NAPI rescheduling as ixgbe_poll() states that
there is still some work to be done.

To fix this, do not set work_done to false for a !netif_carrier_ok().

Fixes: c685c69f ("ixgbe: don't do any AF_XDP zero-copy transmit if netif is not OK")
Reported-by: Maurice Baijens <maurice.baijens@ellips.com>
Tested-by: Maurice Baijens <maurice.baijens@ellips.com>
Signed-off-by: Maciej Fijalkowski <maciej.fijalkowski@intel.com>
Tested-by: Sandeep Penigalapati <sandeep.penigalapati@intel.com>
Signed-off-by: Tony Nguyen <anthony.l.nguyen@intel.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

Ido Schimmel says:

====================
selftests: mlxsw: A couple of fixes

Patch #1 fixes a breakage due to a change in iproute2 output. The real
problem is not iproute2, but the fact that the check was not strict
enough. Fixed by using JSON output instead. Targeting at net so that the
test will pass as part of old and new kernels regardless of iproute2
version.

Patch #2 fixes an issue uncovered by the first one.
====================

Link: https://lore.kernel.org/r/20220302161447.217447-1-idosch@nvidia.com


Signed-off-by: Jakub Kicinski <kuba@kernel.org>

The test runs several test cases and is supposed to return an error in
case at least one of them failed.

Currently, the check of the return value of each test case is in the
wrong place, which can result in the wrong return value. For example:

 # TESTS='tc_police' ./resource_scale.sh
 TEST: 'tc_police' [default] 968                                     [FAIL]
         tc police offload count failed
 Error: mlxsw_spectrum: Failed to allocate policer index.
 We have an error talking to the kernel
 Command failed /tmp/tmp.i7Oc5HwmXY:969
 TEST: 'tc_police' [default] overflow 969                            [ OK ]
 ...
 TEST: 'tc_police' [ipv4_max] overflow 969                           [ OK ]

 $ echo $?
 0

Fix this by moving the check to be done after each test case.

Fixes: 059b18e2 ("selftests: mlxsw: Return correct error code in resource scale test")
Signed-off-by: Amit Cohen <amcohen@nvidia.com>
Reviewed-by: Petr Machata <petrm@nvidia.com>
Signed-off-by: Ido Schimmel <idosch@nvidia.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

The test adds tc filters and checks how many of them were offloaded by
grepping for 'in_hw'.

iproute2 commit f4cd4f127047 ("tc: add skip_hw and skip_sw to control
action offload") added offload indication to tc actions, producing the
following output:

 $ tc filter show dev swp2 ingress
 ...
 filter protocol ipv6 pref 1000 flower chain 0 handle 0x7c0
   eth_type ipv6
   dst_ip 2001:db8:1::7bf
   skip_sw
   in_hw in_hw_count 1
         action order 1:  police 0x7c0 rate 10Mbit burst 100Kb mtu 2Kb action drop overhead 0b
         ref 1 bind 1
         not_in_hw
         used_hw_stats immediate

The current grep expression matches on both 'in_hw' and 'not_in_hw',
resulting in incorrect results.

Fix that by using JSON output instead.

Fixes: 5061e773 ("selftests: mlxsw: Add scale test for tc-police")
Signed-off-by: Amit Cohen <amcohen@nvidia.com>
Reviewed-by: Petr Machata <petrm@nvidia.com>
Signed-off-by: Ido Schimmel <idosch@nvidia.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

Ido Schimmel points out that since commit 52cff74e ("dcbnl : Disable
software interrupts before taking dcb_lock"), the DCB API can be called
by drivers from softirq context.

One such in-tree example is the chelsio cxgb4 driver:
dcb_rpl
-> cxgb4_dcb_handle_fw_update
   -> dcb_ieee_setapp

If the firmware for this driver happened to send an event which resulted
in a call to dcb_ieee_setapp() at the exact same time as another
DCB-enabled interface was unregistering on the same CPU, the softirq
would deadlock, because the interrupted process was already holding the
dcb_lock in dcbnl_flush_dev().

Fix this unlikely event by using spin_lock_bh() in dcbnl_flush_dev() as
in the rest of the dcbnl code.

Fixes: 91b0383f ("net: dcb: flush lingering app table entries for unregistered devices")
Reported-by: Ido Schimmel <idosch@idosch.org>
Signed-off-by: Vladimir Oltean <vladimir.oltean@nxp.com>
Link: https://lore.kernel.org/r/20220302193939.1368823-1-vladimir.oltean@nxp.com


Signed-off-by: Jakub Kicinski <kuba@kernel.org>

Fix an error message and report the correct failing function.

Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr>
Signed-off-by: David S. Miller <davem@davemloft.net>

seqno could be read as a stale value outside of the lock. The lock is
already acquired to protect the modification of seqno against a possible
race condition. Place the reading of this value also inside this locking
to protect it against a possible race condition.

Signed-off-by: Niels Dossche <dossche.niels@gmail.com>
Acked-by: Martin Habets <habetsm.xilinx@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

D. Wythe says:

====================
fix unexpected SMC_CLC_DECL_ERR_REGRMB error

We can easily trigger the SMC_CLC_DECL_ERR_REGRMB exception within
following script:

server: smc_run nginx
client: smc_run  ./wrk -c 2000 -t 8 -d 20 http://smc-server



And we can clearly see that this error is also divided into two types:

1. 0x09990003
2. 0x05000000/0x09990003

Which has the same root causes, but the immediate causes vary.

The root cause of this issues is that remove connections from link group
is not synchronous with add/delete rtoken entry,  which means that even
the number of connections is less that SMC_RMBS_PER_LGR_MAX, it does not
mean that the connection can register rtoken successfully later. In
other words, the rtoken entry may released, This will cause an
unexpected SMC_CLC_DECL_ERR_REGRMB to be reported, and then this SMC
connections have to fallback to TCP.

This patch set handles two types of SMC_CLC_DECL_ERR_REGRMB exceptions
from different perspectives.

Patch 1: fix the 0x05000000/0x09990003 error.
Patch 2: fix the 0x09990003 error.

After those patches, there is no SMC_CLC_DECL_ERR_REGRMB exceptions in
my
test case any more.

v1 -> v2:
- add bugfix patch for SMC_CLC_DECL_ERR_REGRMB cause by server side
v2 -> v3:
- fix incorrect mail thread
====================

Signed-off-by: David S. Miller <davem@davemloft.net>

The problem of SMC_CLC_DECL_ERR_REGRMB on the server is very clear.
Based on the fact that whether a new SMC connection can be accepted or
not depends on not only the limit of conn nums, but also the available
entries of rtoken. Since the rtoken release is trigger by peer, while
the conn nums is decrease by local, tons of thing can happen in this
time difference.

This only thing that needs to be mentioned is that now all connection
creations are completely protected by smc_server_lgr_pending lock, it's
enough to check only the available entries in rtokens_used_mask.

Fixes: cd6851f3 ("smc: remote memory buffers (RMBs)")
Signed-off-by: D. Wythe <alibuda@linux.alibaba.com>
Signed-off-by: David S. Miller <davem@davemloft.net>