Merge 5.8-rc3 into usb-next

We want the USB fixes in here, and this resolves a merge issue found in
linux-next.

Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

Merge 5.8-rc3 into staging-next

We want the staging fixes in here as well.

Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

Merge 5.8-rc2 into usb-linus

Felipe has based his patches on that tag, so update my usb-linus branch
to it as well so that I can pull his patches in here easier.

Signed-off-by: Greg Kroah-Hartman <

Merge 5.8-rc2 into usb-linus

Felipe has based his patches on that tag, so update my usb-linus branch
to it as well so that I can pull his patches in here easier.

Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

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Merge branch 'linus' into x86/entry, to resolve conflicts

Conflicts:
arch/x86/kernel/traps.c

Signed-off-by: Ingo Molnar <mingo@kernel.org>

Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net

Minor overlapping changes in xfrm_device.c, between the double
ESP trailing bug fix setting the XFRM_INIT flag and the changes
in net-n

Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net

Minor overlapping changes in xfrm_device.c, between the double
ESP trailing bug fix setting the XFRM_INIT flag and the changes
in net-next preparing for bonding encryption support.

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

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Merge drm/drm-next into drm-intel-next-queued

Catch up with upstream, in particular to get c1e8d7c6a7a6 ("mmap locking
API: convert mmap_sem comments").

Signed-off-by: Jani Nikula <jani.nikula@inte

Merge drm/drm-next into drm-intel-next-queued

Catch up with upstream, in particular to get c1e8d7c6a7a6 ("mmap locking
API: convert mmap_sem comments").

Signed-off-by: Jani Nikula <jani.nikula@intel.com>

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Merge branch 'raw_dumps' into rdma.git for-next

Maor Gottlieb says:

====================
The following series adds support to get the RDMA resource data in RAW
format. The main motivation for doing

Merge branch 'raw_dumps' into rdma.git for-next

Maor Gottlieb says:

====================
The following series adds support to get the RDMA resource data in RAW
format. The main motivation for doing this is to enable vendors to return
the entire QP/CQ/MR data without a need from the vendor to set each
field separately.
====================

Based on the mlx5-next branch at
git://git.kernel.org/pub/scm/linux/kernel/git/mellanox/linux
due to dependencies

* branch 'raw_dumps':
RDMA/mlx5: Add support to get MR resource in RAW format
RDMA/mlx5: Add support to get CQ resource in RAW format
RDMA/mlx5: Add support to get QP resource in RAW format
RDMA: Add support to dump resource tracker in RAW format
RDMA: Add dedicated CM_ID resource tracker function
RDMA: Add dedicated QP resource tracker function
RDMA: Add a dedicated CQ resource tracker function
RDMA: Add dedicated MR resource tracker function
RDMA/core: Don't call fill_res_entry for PD
net/mlx5: Add support in query QP, CQ and MKEY segments
net/mlx5: Export resource dump interface

Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>

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Merge branch 'hch' (maccess patches from Christoph Hellwig)

Merge non-faulting memory access cleanups from Christoph Hellwig:
"Andrew and I decided to drop the patches implementing your suggested

Merge branch 'hch' (maccess patches from Christoph Hellwig)

Merge non-faulting memory access cleanups from Christoph Hellwig:
"Andrew and I decided to drop the patches implementing your suggested
rename of the probe_kernel_* and probe_user_* helpers from -mm as
there were way to many conflicts.

After -rc1 might be a good time for this as all the conflicts are
resolved now"

This also adds a type safety checking patch on top of the renaming
series to make the subtle behavioral difference between 'get_user()' and
'get_kernel_nofault()' less potentially dangerous and surprising.

* emailed patches from Christoph Hellwig <hch@lst.de>:
maccess: make get_kernel_nofault() check for minimal type compatibility
maccess: rename probe_kernel_address to get_kernel_nofault
maccess: rename probe_user_{read,write} to copy_{from,to}_user_nofault
maccess: rename probe_kernel_{read,write} to copy_{from,to}_kernel_nofault

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maccess: rename probe_kernel_{read,write} to copy_{from,to}_kernel_nofault

Better describe what these functions do.

Suggested-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Chris

maccess: rename probe_kernel_{read,write} to copy_{from,to}_kernel_nofault

Better describe what these functions do.

Suggested-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

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Merge remote-tracking branch 'torvalds/master' into perf/urgent

To get some newer headers that got out of sync with the copies in tools/
so that we can try to have the tools/perf/ build clean for v5

Merge remote-tracking branch 'torvalds/master' into perf/urgent

To get some newer headers that got out of sync with the copies in tools/
so that we can try to have the tools/perf/ build clean for v5.8 with
fewer pull requests.

Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

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Merge tag 'v5.8-rc1' into regulator-5.8

Linux 5.8-rc1

Merge tag 'v5.8-rc1' into fixes

Linux 5.8-rc1

Merge v5.8-rc1 into drm-misc-fixes

Beginning a new release cycles for what will become v5.8. Updating
drm-misc-fixes accordingly.

Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>

Merge branch 'dt/schema-cleanups' into dt/linus

Merge branch 'x86/entry' into ras/core

to fixup conflicts in arch/x86/kernel/cpu/mce/core.c so MCE specific follow
up patches can be applied without creating a horrible merge conflict
afterwards.

Merge branch 'akpm' (patches from Andrew)

Merge even more updates from Andrew Morton:

- a kernel-wide sweep of show_stack()

- pagetable cleanups

- abstract out accesses to mmap_sem - prep for

Merge branch 'akpm' (patches from Andrew)

Merge even more updates from Andrew Morton:

- a kernel-wide sweep of show_stack()

- pagetable cleanups

- abstract out accesses to mmap_sem - prep for mmap_sem scalability work

- hch's user acess work

Subsystems affected by this patch series: debug, mm/pagemap, mm/maccess,
mm/documentation.

* emailed patches from Andrew Morton <akpm@linux-foundation.org>: (93 commits)
include/linux/cache.h: expand documentation over __read_mostly
maccess: return -ERANGE when probe_kernel_read() fails
x86: use non-set_fs based maccess routines
maccess: allow architectures to provide kernel probing directly
maccess: move user access routines together
maccess: always use strict semantics for probe_kernel_read
maccess: remove strncpy_from_unsafe
tracing/kprobes: handle mixed kernel/userspace probes better
bpf: rework the compat kernel probe handling
bpf:bpf_seq_printf(): handle potentially unsafe format string better
bpf: handle the compat string in bpf_trace_copy_string better
bpf: factor out a bpf_trace_copy_string helper
maccess: unify the probe kernel arch hooks
maccess: remove probe_read_common and probe_write_common
maccess: rename strnlen_unsafe_user to strnlen_user_nofault
maccess: rename strncpy_from_unsafe_strict to strncpy_from_kernel_nofault
maccess: rename strncpy_from_unsafe_user to strncpy_from_user_nofault
maccess: update the top of file comment
maccess: clarify kerneldoc comments
maccess: remove duplicate kerneldoc comments
...

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maccess: always use strict semantics for probe_kernel_read

Except for historical confusion in the kprobes/uprobes and bpf tracers,
which has been fixed now, there is no good reason to ever allow use

maccess: always use strict semantics for probe_kernel_read

Except for historical confusion in the kprobes/uprobes and bpf tracers,
which has been fixed now, there is no good reason to ever allow user
memory accesses from probe_kernel_read. Switch probe_kernel_read to only
read from kernel memory.

[akpm@linux-foundation.org: update it for "mm, dump_page(): do not crash with invalid mapping pointer"]

Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Cc: Alexei Starovoitov <ast@kernel.org>
Cc: Daniel Borkmann <daniel@iogearbox.net>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Masami Hiramatsu <mhiramat@kernel.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Link: http://lkml.kernel.org/r/20200521152301.2587579-17-hch@lst.de
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

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Merge branch 'next' into for-linus

Prepare input updates for 5.8 merge window.

Merge branches 'for-5.7/upstream-fixes', 'for-5.8/apple', 'for-5.8/asus', 'for-5.8/core', 'for-5.8/intel-ish', 'for-5.8/logitech', 'for-5.8/mcp2221' and 'for-5.8/multitouch' into for-linus

Merge branch 'akpm' (patches from Andrew)

Merge updates from Andrew Morton:
"A few little subsystems and a start of a lot of MM patches.

Subsystems affected by this patch series: squashfs, ocfs2

Merge branch 'akpm' (patches from Andrew)

Merge updates from Andrew Morton:
"A few little subsystems and a start of a lot of MM patches.

Subsystems affected by this patch series: squashfs, ocfs2, parisc,
vfs. With mm subsystems: slab-generic, slub, debug, pagecache, gup,
swap, memcg, pagemap, memory-failure, vmalloc, kasan"

* emailed patches from Andrew Morton <akpm@linux-foundation.org>: (128 commits)
kasan: move kasan_report() into report.c
mm/mm_init.c: report kasan-tag information stored in page->flags
ubsan: entirely disable alignment checks under UBSAN_TRAP
kasan: fix clang compilation warning due to stack protector
x86/mm: remove vmalloc faulting
mm: remove vmalloc_sync_(un)mappings()
x86/mm/32: implement arch_sync_kernel_mappings()
x86/mm/64: implement arch_sync_kernel_mappings()
mm/ioremap: track which page-table levels were modified
mm/vmalloc: track which page-table levels were modified
mm: add functions to track page directory modifications
s390: use __vmalloc_node in stack_alloc
powerpc: use __vmalloc_node in alloc_vm_stack
arm64: use __vmalloc_node in arch_alloc_vmap_stack
mm: remove vmalloc_user_node_flags
mm: switch the test_vmalloc module to use __vmalloc_node
mm: remove __vmalloc_node_flags_caller
mm: remove both instances of __vmalloc_node_flags
mm: remove the prot argument to __vmalloc_node
mm: remove the pgprot argument to __vmalloc
...

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mm, dump_page(): do not crash with invalid mapping pointer

We have seen a following problem on a RPi4 with 1G RAM:

BUG: Bad page state in process systemd-hwdb pfn:35601
page:ffff7e0000d580

mm, dump_page(): do not crash with invalid mapping pointer

We have seen a following problem on a RPi4 with 1G RAM:

BUG: Bad page state in process systemd-hwdb pfn:35601
page:ffff7e0000d58040 refcount:15 mapcount:131221 mapping:efd8fe765bc80080 index:0x1 compound_mapcount: -32767
Unable to handle kernel paging request at virtual address efd8fe765bc80080
Mem abort info:
ESR = 0x96000004
Exception class = DABT (current EL), IL = 32 bits
SET = 0, FnV = 0
EA = 0, S1PTW = 0
Data abort info:
ISV = 0, ISS = 0x00000004
CM = 0, WnR = 0
[efd8fe765bc80080] address between user and kernel address ranges
Internal error: Oops: 96000004 [#1] SMP
Modules linked in: btrfs libcrc32c xor xor_neon zlib_deflate raid6_pq mmc_block xhci_pci xhci_hcd usbcore sdhci_iproc sdhci_pltfm sdhci mmc_core clk_raspberrypi gpio_raspberrypi_exp pcie_brcmstb bcm2835_dma gpio_regulator phy_generic fixed sg scsi_mod efivarfs
Supported: No, Unreleased kernel
CPU: 3 PID: 408 Comm: systemd-hwdb Not tainted 5.3.18-8-default #1 SLE15-SP2 (unreleased)
Hardware name: raspberrypi rpi/rpi, BIOS 2020.01 02/21/2020
pstate: 40000085 (nZcv daIf -PAN -UAO)
pc : __dump_page+0x268/0x368
lr : __dump_page+0xc4/0x368
sp : ffff000012563860
x29: ffff000012563860 x28: ffff80003ddc4300
x27: 0000000000000010 x26: 000000000000003f
x25: ffff7e0000d58040 x24: 000000000000000f
x23: efd8fe765bc80080 x22: 0000000000020095
x21: efd8fe765bc80080 x20: ffff000010ede8b0
x19: ffff7e0000d58040 x18: ffffffffffffffff
x17: 0000000000000001 x16: 0000000000000007
x15: ffff000011689708 x14: 3030386362353637
x13: 6566386466653a67 x12: 6e697070616d2031
x11: 32323133313a746e x10: 756f6370616d2035
x9 : ffff00001168a840 x8 : ffff00001077a670
x7 : 000000000000013d x6 : ffff0000118a43b5
x5 : 0000000000000001 x4 : ffff80003dd9e2c8
x3 : ffff80003dd9e2c8 x2 : 911c8d7c2f483500
x1 : dead000000000100 x0 : efd8fe765bc80080
Call trace:
__dump_page+0x268/0x368
bad_page+0xd4/0x168
check_new_page_bad+0x80/0xb8
rmqueue_bulk.constprop.26+0x4d8/0x788
get_page_from_freelist+0x4d4/0x1228
__alloc_pages_nodemask+0x134/0xe48
alloc_pages_vma+0x198/0x1c0
do_anonymous_page+0x1a4/0x4d8
__handle_mm_fault+0x4e8/0x560
handle_mm_fault+0x104/0x1e0
do_page_fault+0x1e8/0x4c0
do_translation_fault+0xb0/0xc0
do_mem_abort+0x50/0xb0
el0_da+0x24/0x28
Code: f9401025 8b8018a0 9a851005 17ffffca (f94002a0)

Besides the underlying issue with page->mapping containing a bogus value
for some reason, we can see that __dump_page() crashed by trying to read
the pointer at mapping->host, turning a recoverable warning into full
Oops.

It can be expected that when page is reported as bad state for some
reason, the pointers there should not be trusted blindly.

So this patch treats all data in __dump_page() that depends on
page->mapping as lava, using probe_kernel_read_strict(). Ideally this
would include the dentry->d_parent recursively, but that would mean
changing printk handler for %pd. Chances of reaching the dentry
printing part with an initially bogus mapping pointer should be rather
low, though.

Also prefix printing mapping->a_ops with a description of what is being
printed. In case the value is bogus, %ps will print raw value instead
of the symbol name and then it's not obvious at all that it's printing
a_ops.

Reported-by: Petr Tesarik <ptesarik@suse.cz>
Signed-off-by: Vlastimil Babka <vbabka@suse.cz>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Acked-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Cc: Matthew Wilcox <willy@infradead.org>
Cc: John Hubbard <jhubbard@nvidia.com>
Link: http://lkml.kernel.org/r/20200331165454.12263-1-vbabka@suse.cz
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

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Merge branch 'for-5.8' into for-linus

Merge branch 'timers/drivers/timer-ti' into timers/drivers/next

Merge tag 'v5.6' into next

Sync up with mainline to get device tree and other changes.

Merge branch 'for-mingo' of git://git.kernel.org/pub/scm/linux/kernel/git/paulmck/linux-rcu into core/rcu

Pull RCU updates from Paul McKenney:

1. Miscellaneous fixes.
2. kfree_rcu() updates.

Merge branch 'for-mingo' of git://git.kernel.org/pub/scm/linux/kernel/git/paulmck/linux-rcu into core/rcu

Pull RCU updates from Paul McKenney:

1. Miscellaneous fixes.
2. kfree_rcu() updates.
3. Remove scheduler locking restriction
4. RCU-tasks update, including addition of RCU Tasks Trace for
BPF use and RCU Tasks Rude. (This branch is on top of #3 due
to overlap of changed code.)
5. RCU CPU stall warning updates.
6. Torture-test updates.

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