The current codebase makes use of the zero-length array language
extension to the C90 standard, but the preferred mechanism to declare
variable-length types such as these ones is a flexible array member[1][2],
introduced in C99:

struct foo {
        int stuff;
        struct boo array[];
};

By making use of the mechanism above, we will get a compiler warning
in case the flexible array does not occur last in the structure, which
will help us prevent some kind of undefined behavior bugs from being
inadvertently introduced[3] to the codebase from now on.

Also, notice that, dynamic memory allocations won't be affected by
this change:

"Flexible array members have incomplete type, and so the sizeof operator
may not be applied. As a quirk of the original implementation of
zero-length arrays, sizeof evaluates to zero."[1]

sizeof(flexible-array-member) triggers a warning because flexible array
members have incomplete type[1]. There are some instances of code in
which the sizeof operator is being incorrectly/erroneously applied to
zero-length arrays and the result is zero. Such instances may be hiding
some bugs. So, this work (flexible-array member conversions) will also
help to get completely rid of those sorts of issues.

Also, the following issue shows up due to the flexible-array member
having incomplete type[4]:

drivers/char/tpm/eventlog/tpm2.c: In function ‘tpm2_bios_measurements_start’:
drivers/char/tpm/eventlog/tpm2.c:54:46: error: invalid application of ‘sizeof’ to incomplete type ‘u8[]’ {aka ‘unsigned char[]’}
   54 |  size = sizeof(struct tcg_pcr_event) - sizeof(event_header->event)
      |                                              ^
drivers/char/tpm/eventlog/tpm2.c: In function ‘tpm2_bios_measurements_next’:
drivers/char/tpm/eventlog/tpm2.c:102:10: error: invalid application of ‘sizeof’ to incomplete type ‘u8[]’ {aka ‘unsigned char[]’}
  102 |    sizeof(event_header->event) + event_header->event_size;
      |          ^
drivers/char/tpm/eventlog/tpm2.c: In function ‘tpm2_binary_bios_measurements_show’:
drivers/char/tpm/eventlog/tpm2.c:140:10: error: invalid application of ‘sizeof’ to incomplete type ‘u8[]’ {aka ‘unsigned char[]’}
  140 |    sizeof(event_header->event) + event_header->event_size;
      |          ^
scripts/Makefile.build:266: recipe for target 'drivers/char/tpm/eventlog/tpm2.o' failed
make[3]: *** [drivers/char/tpm/eventlog/tpm2.o] Error 1

As mentioned above: "Flexible array members have incomplete type, and
so the sizeof operator may not be applied. As a quirk of the original
implementation of zero-length arrays, sizeof evaluates to zero."[1] As
in "sizeof(event_header->event) always evaluated to 0, so removing it
has no effect".

Lastly, make use of the struct_size() helper to deal with the
flexible array member and its host structure.

This issue was found with the help of Coccinelle.

[1] https://gcc.gnu.org/onlinedocs/gcc/Zero-Length.html
[2] https://github.com/KSPP/linux/issues/21
[3] commit 76497732

 ("cxgb3/l2t: Fix undefined behaviour")
[4] https://github.com/KSPP/linux/issues/43

Signed-off-by: Gustavo A. R. Silva <gustavo@embeddedor.com>
Reviewed-by: Kees Cook <keescook@chromium.org>
Reviewed-by: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com>
Signed-off-by: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com>

There is export_uuid() function which exports uuid_t to the u8 array.
Use it instead of open coding variant.

This allows to hide the uuid_t internals.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Acked-by: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com>
Signed-off-by: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com>

Merge tag 'apparmor-pr-2020-05-21' of git://git.kernel.org/pub/scm/linux/kernel/git/jj/linux-apparmor

Pull apparmor bug fixes from John Johansen:

 - Fix use-after-free in aa_audit_rule_init

 - Fix refcnt leak in policy_update

 - Fix potential label refcnt leak in aa_change_profile

* tag 'apparmor-pr-2020-05-21' of git://git.kernel.org/pub/scm/linux/kernel/git/jj/linux-apparmor:
  apparmor: Fix use-after-free in aa_audit_rule_init
  apparmor: Fix aa_label refcnt leak in policy_update
  apparmor: fix potential label refcnt leak in aa_change_profile

As Ubuntu and Fedora release new version used kernel version equal to or
higher than v5.4, They started to support kernel exfat filesystem.

Linus reported a mount error with new version of exfat on Fedora:

        exfat: Unknown parameter 'namecase'

This is because there is a difference in mount option between old
staging/exfat and new exfat.  And utf8, debug, and codepage options as
well as namecase have been removed from new exfat.

This patch add the dummy mount options as deprecated option to be
backward compatible with old one.

Reported-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Namjae Jeon <namjae.jeon@samsung.com>
Cc: Matthew Wilcox <willy@infradead.org>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Cc: Eric Sandeen <sandeen@sandeen.net>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

In the implementation of aa_audit_rule_init(), when aa_label_parse()
fails the allocated memory for rule is released using
aa_audit_rule_free(). But after this release, the return statement
tries to access the label field of the rule which results in
use-after-free. Before releasing the rule, copy errNo and return it
after release.

Fixes: 52e8c380

 ("apparmor: Fix memory leak of rule on error exit path")
Signed-off-by: Navid Emamdoost <navid.emamdoost@gmail.com>
Signed-off-by: John Johansen <john.johansen@canonical.com>

policy_update() invokes begin_current_label_crit_section(), which
returns a reference of the updated aa_label object to "label" with
increased refcount.

When policy_update() returns, "label" becomes invalid, so the refcount
should be decreased to keep refcount balanced.

The reference counting issue happens in one exception handling path of
policy_update(). When aa_may_manage_policy() returns not NULL, the
refcnt increased by begin_current_label_crit_section() is not decreased,
causing a refcnt leak.

Fix this issue by jumping to "end_section" label when
aa_may_manage_policy() returns not NULL.

Fixes: 5ac8c355

 ("apparmor: allow introspecting the loaded policy pre internal transform")
Signed-off-by: Xiyu Yang <xiyuyang19@fudan.edu.cn>
Signed-off-by: Xin Tan <tanxin.ctf@gmail.com>
Signed-off-by: John Johansen <john.johansen@canonical.com>

aa_change_profile() invokes aa_get_current_label(), which returns
a reference of the current task's label.

According to the comment of aa_get_current_label(), the returned
reference must be put with aa_put_label().
However, when the original object pointed by "label" becomes
unreachable because aa_change_profile() returns or a new object
is assigned to "label", reference count increased by
aa_get_current_label() is not decreased, causing a refcnt leak.

Fix this by calling aa_put_label() before aa_change_profile() return
and dropping unnecessary aa_get_current_label().

Fixes: 9fcf78cc

 ("apparmor: update domain transitions that are subsets of confinement at nnp")
Signed-off-by: Xiyu Yang <xiyuyang19@fudan.edu.cn>
Signed-off-by: Xin Tan <tanxin.ctf@gmail.com>
Signed-off-by: John Johansen <john.johansen@canonical.com>

Pull virtio fixes from Michael Tsirkin:
 "Fix a couple of build warnings"

* tag 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mst/vhost:
  vhost: missing __user tags
  vdpasim: remove unused variable 'ret'

Pull dmaengine fixes from Vinod Koul:
 "Some driver fixes:

   - dmatest restoration of defaults

   - tegra210-adma probe handling fix

   - k3-udma flags fixed for slave_sg and memcpy

   - list fix for zynqmp_dma

   - idxd interrupt completion fix

   - lock fix for owl"

* tag 'dmaengine-fix-5.7-rc7' of git://git.infradead.org/users/vkoul/slave-dma:
  dmaengine: tegra210-adma: Fix an error handling path in 'tegra_adma_probe()'
  dmaengine: ti: k3-udma: Fix TR mode flags for slave_sg and memcpy
  dmaengine: zynqmp_dma: Move list_del inside zynqmp_dma_free_descriptor.
  dmaengine: dmatest: Restore default for channel
  dmaengine: idxd: fix interrupt completion after unmasking
  dmaengine: owl: Use correct lock in owl_dma_get_pchan()

Pull ext4 fixes from Ted Ts'o:
 "Fix regression in ext4's FIEMAP handling introduced in v5.7-rc1"

* tag 'fiemap-regression-fix' of git://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4:
  ext4: fix fiemap size checks for bitmap files
  ext4: fix EXT4_MAX_LOGICAL_BLOCK macro

Pull MTD fixes from Richard Weinberger:

 - Fix a PM regression in brcmnand driver

 - Propagate ECC information correctly on SPI-NAND

 - Make sure no MTD name is used multiple time in nvmem

* tag 'fixes-for-5.7-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/mtd/linux:
  mtd:rawnand: brcmnand: Fix PM resume crash
  mtd: Fix mtd not registered due to nvmem name collision
  mtd: spinand: Propagate ECC information to the MTD structure

Pull UBI and UBIFS fixes from Richard Weinberger:

 - Correctly set next cursor for detailed_erase_block_info debugfs file

 - Don't use crypto_shash_descsize() for digest size in UBIFS

 - Remove broken lazytime support from UBIFS

* tag 'for-linus-5.7-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/rw/ubifs:
  ubi: Fix seq_file usage in detailed_erase_block_info debugfs file
  ubifs: fix wrong use of crypto_shash_descsize()
  ubifs: remove broken lazytime support

Pull UML fixes from Richard Weinberger:

 - Two missing includes which caused build issues on recent systems

 - Correctly set TRANS_GRE_LEN in our vector network driver

* tag 'for-linus-5.7-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/rw/uml:
  um: Fix typo in vector driver transport option definition
  um: syscall.c: include <asm/unistd.h>
  um: Fix xor.h include

Pull power management fix from Rafael Wysocki:
 "This makes a recently introduced suspend-to-idle wakeup issue on Dell
  XPS13 9360 go away"

* tag 'pm-5.7-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm:
  ACPI: EC: PM: Avoid flushing EC work when EC GPE is inactive

Pull overlayfs fixes from Miklos Szeredi:
 "Fix two bugs introduced in this cycle and one introduced in v5.5"

* tag 'ovl-fixes-5.7-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/mszeredi/vfs:
  ovl: potential crash in ovl_fid_to_fh()
  ovl: clear ATTR_OPEN from attr->ia_valid
  ovl: clear ATTR_FILE from attr->ia_valid

syzbot is reporting that splice()ing from non-empty read side to
already-full write side causes unkillable task, for opipe_prep() is by
error not inverting pipe_full() test.

  CPU: 0 PID: 9460 Comm: syz-executor.5 Not tainted 5.6.0-rc3-next-20200228-syzkaller #0
  Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
  RIP: 0010:rol32 include/linux/bitops.h:105 [inline]
  RIP: 0010:iterate_chain_key kernel/locking/lockdep.c:369 [inline]
  RIP: 0010:__lock_acquire+0x6a3/0x5270 kernel/locking/lockdep.c:4178
  Call Trace:
     lock_acquire+0x197/0x420 kernel/locking/lockdep.c:4720
     __mutex_lock_common kernel/locking/mutex.c:956 [inline]
     __mutex_lock+0x156/0x13c0 kernel/locking/mutex.c:1103
     pipe_lock_nested fs/pipe.c:66 [inline]
     pipe_double_lock+0x1a0/0x1e0 fs/pipe.c:104
     splice_pipe_to_pipe fs/splice.c:1562 [inline]
     do_splice+0x35f/0x1520 fs/splice.c:1141
     __do_sys_splice fs/splice.c:1447 [inline]
     __se_sys_splice fs/splice.c:1427 [inline]
     __x64_sys_splice+0x2b5/0x320 fs/splice.c:1427
     do_syscall_64+0xf6/0x790 arch/x86/entry/common.c:295
     entry_SYSCALL_64_after_hwframe+0x49/0xbe

Reported-by:  <syzbot+b48daca8639150bc5e73@syzkaller.appspotmail.com>
Link: https://syzkaller.appspot.com/bug?id=9386d051e11e09973d5a4cf79af5e8cedf79386d
Fixes: 8cefc107

 ("pipe: Use head and tail pointers for the ring, not cursor and length")
Cc: stable@vger.kernel.org # 5.5+
Signed-off-by: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

Pull vfs fix from Al Viro:
 "Stable fodder fix: copy_fdtable() would get screwed on 64bit boxen
  with sysctl_nr_open raised to 512M or higher, which became possible
  since 2.6.25.

  Nobody sane would set the things up that way, but..."

* 'fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs:
  fix multiplication overflow in copy_fdtable()

Pull ARC fixes from Vineet Gupta:

 - fix recent DSP code regression on ARC700 platforms

 - fix thinkos in ICCM/DCCM size checks

 - USB regression fix

 - other small fixes here and there

* tag 'arc-5.7-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/vgupta/arc:
  ARC: show_regs: avoid extra line of output
  ARC: guard dsp early init against non ARCv2
  ARC: [plat-eznps]: Restrict to CONFIG_ISA_ARCOMPACT
  ARC: entry: comment
  arc: remove #ifndef CONFIG_AS_CFI_SIGNAL_FRAME
  arc: ptrace: hard-code "arc" instead of UTS_MACHINE
  ARC: [plat-hsdk]: fix USB regression
  ARC: Fix ICCM & DCCM runtime size checks

cpy and set really should be size_t; we won't get an overflow on that,
since sysctl_nr_open can't be set above ~(size_t)0 / sizeof(void *),
so nr that would've managed to overflow size_t on that multiplication
won't get anywhere near copy_fdtable() - we'll fail with EMFILE
before that.

Cc: stable@kernel.org # v2.6.25+
Fixes: 9cfe015a

 (get rid of NR_OPEN and introduce a sysctl_nr_open)
Reported-by: Thiago Macieira <thiago.macieira@intel.com>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

Add an extra validation of the len parameter, as for ext4 some files
might have smaller file size limits than others.  This also means the
redundant size check in ext4_ioctl_get_es_cache can go away, as all
size checking is done in the shared fiemap handler.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Ritesh Harjani <riteshh@linux.ibm.com>
Reviewed-by: Jan Kara <jack@suse.cz>
Link: https://lore.kernel.org/r/20200505154324.3226743-3-hch@lst.de
Signed-off-by: Theodore Ts'o <tytso@mit.edu>

ext4 supports max number of logical blocks in a file to be 0xffffffff.
(This is since ext4_extent's ee_block is __le32).
This means that EXT4_MAX_LOGICAL_BLOCK should be 0xfffffffe (starting
from 0 logical offset). This patch fixes this.

The issue was seen when ext4 moved to iomap_fiemap API and when
overlayfs was mounted on top of ext4. Since overlayfs was missing
filemap_check_ranges(), so it could pass a arbitrary huge length which
lead to overflow of map.m_len logic.

This patch fixes that.

Fixes: d3b6f23f

 ("ext4: move ext4_fiemap to use iomap framework")
Reported-by:  <syzbot+77fa5bdb65cc39711820@syzkaller.appspotmail.com>
Signed-off-by: Ritesh Harjani <riteshh@linux.ibm.com>
Reviewed-by: Jan Kara <jack@suse.cz>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Link: https://lore.kernel.org/r/20200505154324.3226743-2-hch@lst.de
Signed-off-by: Theodore Ts'o <tytso@mit.edu>

Pull i2c fixes from Wolfram Sang:
 "A set of driver and core fixes as well as MAINTAINER update"

* 'i2c/for-current-fixed' of git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux:
  MAINTAINERS: add maintainer for mediatek i2c controller driver
  i2c: mux: Replace zero-length array with flexible-array
  i2c: mux: demux-pinctrl: Fix an error handling path in 'i2c_demux_pinctrl_probe()'
  i2c: altera: Fix race between xfer_msg and isr thread
  i2c: algo-pca: update contact email
  i2c: at91: Fix pinmux after devm_gpiod_get() for bus recovery
  i2c: use my kernel.org address from now on
  i2c: fix missing pm_runtime_put_sync in i2c_device_probe

Pull hyperv fix from Wei Liu:
 "One patch from Vitaly to fix reenlightenment notifications"

* tag 'hyperv-fixes-signed' of git://git.kernel.org/pub/scm/linux/kernel/git/hyperv/linux:
  x86/hyperv: Properly suspend/resume reenlightenment notifications

Pull iommu fixes from Joerg Roedel:
 "All related to the AMD IOMMU driver:

   - ACPI table parser fix to correctly read the UID of ACPI devices

   - ACPI UID device matching fix

   - Fix deferred device attachment to a domain in kdump kernels when
     the IOMMU driver uses the dma-iommu DMA-API implementation"

* tag 'iommu-fixes-v5.7-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/joro/iommu:
  iommu: Fix deferred domain attachment
  iommu/amd: Fix get_acpihid_device_id()
  iommu/amd: Fix over-read of ACPI UID from IVRS table

I don't see what security concern is addressed by obfuscating NULL
and IS_ERR() error pointers, printed with %p/%pK.  Given the number
of sites where %p is used (over 10000) and the fact that NULL pointers
aren't uncommon, it probably wouldn't take long for an attacker to
find the hash that corresponds to 0.  Although harder, the same goes
for most common error values, such as -1, -2, -11, -14, etc.

The NULL part actually fixes a regression: NULL pointers weren't
obfuscated until commit 3e5903eb ("vsprintf: Prevent crash when
dereferencing invalid pointers") which went into 5.2.  I'm tacking
the IS_ERR() part on here because error pointers won't leak kernel
addresses and printing them as pointers shouldn't be any different
from e.g. %d with PTR_ERR_OR_ZERO().  Obfuscating them just makes
debugging based on existing pr_debug and friends excruciating.

Note that the "always print 0's for %pK when kptr_restrict == 2"
behaviour which goes way back is left as is.

Example output with the patch applied:

                             ptr         error-ptr              NULL
 %p:            0000000001f8cc5b  fffffffffffffff2  0000000000000000
 %pK, kptr = 0: 0000000001f8cc5b  fffffffffffffff2  0000000000000000
 %px:           ffff888048c04020  fffffffffffffff2  0000000000000000
 %pK, kptr = 1: ffff888048c04020  fffffffffffffff2  0000000000000000
 %pK, kptr = 2: 0000000000000000  0000000000000000  0000000000000000

Fixes: 3e5903eb

 ("vsprintf: Prevent crash when dereferencing invalid pointers")
Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
Reviewed-by: Petr Mladek <pmladek@suse.com>
Reviewed-by: Sergey Senozhatsky <sergey.senozhatsky@gmail.com>
Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Acked-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

Commit b53611fb ("dmaengine: tegra210-adma: Fix crash during probe")
has moved some code in the probe function and reordered the error handling
path accordingly.
However, a goto has been missed.

Fix it and goto the right label if 'dma_async_device_register()' fails, so
that all resources are released.

Fixes: b53611fb

 ("dmaengine: tegra210-adma: Fix crash during probe")
Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr>
Reviewed-by: Jon Hunter <jonathanh@nvidia.com>
Acked-by: Thierry Reding <treding@nvidia.com>
Link: https://lore.kernel.org/r/20200516214205.276266-1-christophe.jaillet@wanadoo.fr
Signed-off-by: Vinod Koul <vkoul@kernel.org>

The IOMMU core code has support for deferring the attachment of a domain
to a device. This is needed in kdump kernels where the new domain must
not be attached to a device before the device driver takes it over.

When the AMD IOMMU driver got converted to use the dma-iommu
implementation, the deferred attaching got lost. The code in
dma-iommu.c has support for deferred attaching, but it calls into
iommu_attach_device() to actually do it. But iommu_attach_device()
will check if the device should be deferred in it code-path and do
nothing, breaking deferred attachment.

Move the is_deferred_attach() check out of the attach_device path and
into iommu_group_add_device() to make deferred attaching work from the
dma-iommu code.

Fixes: 795bbbb9

 ("iommu/dma-iommu: Handle deferred devices")
Reported-by: Jerry Snitselaar <jsnitsel@redhat.com>
Suggested-by: Robin Murphy <robin.murphy@arm.com>
Signed-off-by: Joerg Roedel <jroedel@suse.de>
Tested-by: Jerry Snitselaar <jsnitsel@redhat.com>
Cc: Jerry Snitselaar <jsnitsel@redhat.com>
Cc: Tom Murphy <murphyt7@tcd.ie>
Cc: Robin Murphy <robin.murphy@arm.com>
Link: https://lore.kernel.org/r/20200519130340.14564-1-joro@8bytes.org

This change fixes crash observed on PM resume. This bug
was introduced in the change made for flash-edu support.

Fixes: a5d53ad2

 ("mtd: rawnand: brcmnand: Add support for flash-edu for dma transfers")

Signed-off-by: Kamal Dasu <kdasu.kdev@gmail.com>
Acked-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: Richard Weinberger <richard@nod.at>

When the nvmem framework is enabled, a nvmem device is created per mtd
device/partition.

It is not uncommon that a device can have multiple mtd devices with
partitions that have the same name. Eg, when there DT overlay is allowed
and the same device with mtd is attached twice.

Under that circumstances, the mtd fails to register due to a name
duplication on the nvmem framework.

With this patch we use the mtdX name instead of the partition name,
which is unique.

[    8.948991] sysfs: cannot create duplicate filename '/bus/nvmem/devices/Production Data'
[    8.948992] CPU: 7 PID: 246 Comm: systemd-udevd Not tainted 5.5.0-qtec-standard #13
[    8.948993] Hardware name: AMD Dibbler/Dibbler, BIOS 05.22.04.0019 10/26/2019
[    8.948994] Call Trace:
[    8.948996]  dump_stack+0x50/0x70
[    8.948998]  sysfs_warn_dup.cold+0x17/0x2d
[    8.949000]  sysfs_do_create_link_sd.isra.0+0xc2/0xd0
[    8.949002]  bus_add_device+0x74/0x140
[    8.949004]  device_add+0x34b/0x850
[    8.949006]  nvmem_register.part.0+0x1bf/0x640
...
[    8.948926] mtd mtd8: Failed to register NVMEM device

Fixes: c4dfa25a

 ("mtd: add support for reading MTD devices via the nvmem API")
Signed-off-by: Ricardo Ribalda Delgado <ribalda@kernel.org>
Acked-by: Miquel Raynal <miquel.raynal@bootlin.com>
Signed-off-by: Richard Weinberger <richard@nod.at>

This is done by default in the raw NAND core (nand_base.c) but was
missing in the SPI-NAND core. Without these two lines the ecc_strength
and ecc_step_size values are not exported to the user through sysfs.

Fixes: 7529df46

 ("mtd: nand: Add core infrastructure to support SPI NANDs")
Cc: stable@vger.kernel.org
Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
Reviewed-by: Boris Brezillon <boris.brezillon@collabora.com>
Signed-off-by: Richard Weinberger <richard@nod.at>

Pull integrity fixes from Mimi Zohar:
 "A couple of miscellaneous bug fixes for the integrity subsystem:

  IMA:

   - Properly modify the open flags in order to calculate the file hash.

   - On systems requiring the IMA policy to be signed, the policy is
     loaded differently. Don't differentiate between "enforce" and
     either "log" or "fix" modes how the policy is loaded.

  EVM:

   - Two patches to fix an EVM race condition, normally the result of
     attempting to load an unsupported hash algorithm.

   - Use the lockless RCU version for walking an append only list"

* 'fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/zohar/linux-integrity:
  evm: Fix a small race in init_desc()
  evm: Fix RCU list related warnings
  ima: Fix return value of ima_write_policy()
  evm: Check also if *tfm is an error pointer in init_desc()
  ima: Set file->f_mode instead of file->f_flags in ima_calc_file_hash()

Pull exfat fixes from Namjae Jeon:

 - Fix potential memory leak in exfat_find

 - Set exfat's splice_write to iter_file_splice_write to fix a splice
   failure on direct-opened files

* tag 'for-5.7-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/linkinjeon/exfat:
  exfat: fix possible memory leak in exfat_find()
  exfat: use iter_file_splice_write

Don't call req->page_done() on each page as we finish filling it with
the data coming from the network.  Whilst this might speed up the
application a bit, it's a problem if there's a network failure and the
operation has to be reissued.

If this happens, an oops occurs because afs_readpages_page_done() clears
the pointer to each page it unlocks and when a retry happens, the
pointers to the pages it wants to fill are now NULL (and the pages have
been unlocked anyway).

Instead, wait till the operation completes successfully and only then
release all the pages after clearing any terminal gap (the server can
give us less data than we requested as we're allowed to ask for more
than is available).

KASAN produces a bug like the following, and even without KASAN, it can
oops and panic.

    BUG: KASAN: wild-memory-access in _copy_to_iter+0x323/0x5f4
    Write of size 1404 at addr 0005088000000000 by task md5sum/5235

    CPU: 0 PID: 5235 Comm: md5sum Not tainted 5.7.0-rc3-fscache+ #250
    Hardware name: ASUS All Series/H97-PLUS, BIOS 2306 10/09/2014
    Call Trace:
     memcpy+0x39/0x58
     _copy_to_iter+0x323/0x5f4
     __skb_datagram_iter+0x89/0x2a6
     skb_copy_datagram_iter+0x129/0x135
     rxrpc_recvmsg_data.isra.0+0x615/0xd42
     rxrpc_kernel_recv_data+0x1e9/0x3ae
     afs_extract_data+0x139/0x33a
     yfs_deliver_fs_fetch_data64+0x47a/0x91b
     afs_deliver_to_call+0x304/0x709
     afs_wait_for_call_to_complete+0x1cc/0x4ad
     yfs_fs_fetch_data+0x279/0x288
     afs_fetch_data+0x1e1/0x38d
     afs_readpages+0x593/0x72e
     read_pages+0xf5/0x21e
     __do_page_cache_readahead+0x128/0x23f
     ondemand_readahead+0x36e/0x37f
     generic_file_buffered_read+0x234/0x680
     new_sync_read+0x109/0x17e
     vfs_read+0xe6/0x138
     ksys_read+0xd8/0x14d
     do_syscall_64+0x6e/0x8a
     entry_SYSCALL_64_after_hwframe+0x49/0xb3

Fixes: 196ee9cd ("afs: Make afs_fs_fetch_data() take a list of pages")
Fixes: 30062bd1

 ("afs: Implement YFS support in the fs client")
Signed-off-by: David Howells <dhowells@redhat.com>
Reviewed-by: Matthew Wilcox (Oracle) <willy@infradead.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

Flushing the EC work while suspended to idle when the EC GPE status
is not set causes some EC wakeup events (notably power button and
lid ones) to be missed after a series of spurious wakeups on the Dell
XPS13 9360 in my office.

If that happens, the machine cannot be woken up from suspend-to-idle
by the power button or lid status change and it needs to be woken up
in some other way (eg. by a key press).

Flushing the EC work only after successful dispatching the EC GPE,
which means that its status has been set, avoids the issue, so change
the code in question accordingly.

Fixes: 7b301750

 ("ACPI: EC: PM: Avoid premature returns from acpi_s2idle_wake()")
Cc: 5.4+ <stable@vger.kernel.org> # 5.4+
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Tested-by: Chris Chiu <chiu@endlessm.com>

'es' is malloced from exfat_get_dentry_set() in exfat_find() and should
be freed before leaving from the error handling cases, otherwise it will
cause memory leak.

Fixes: 5f2aa075

 ("exfat: add inode operations")
Signed-off-by: Wei Yongjun <weiyongjun1@huawei.com>
Signed-off-by: Namjae Jeon <namjae.jeon@samsung.com>

Doing copy_file_range() on exfat with a file opened for direct IO leads
to an -EFAULT:

# xfs_io -f -d -c "truncate 32768" \
       -c "copy_range -d 16384 -l 16384 -f 0" /mnt/test/junk
copy_range: Bad address

and the reason seems to be that we go through:

default_file_splice_write
 splice_from_pipe
  __splice_from_pipe
   write_pipe_buf
    __kernel_write
     new_sync_write
      generic_file_write_iter
       generic_file_direct_write
        exfat_direct_IO
         do_blockdev_direct_IO
          iov_iter_get_pages

and land in iterate_all_kinds(), which does "return -EFAULT" for our kvec
iter.

Setting exfat's splice_write to iter_file_splice_write fixes this and lets
fsx (which originally detected the problem) run to success from
the xfstests harness.

Signed-off-by: Eric Sandeen <sandeen@sandeen.net>
Signed-off-by: Namjae Jeon <namjae.jeon@samsung.com>

Pull IPMI update from Corey Minyard:
 "Convert i2c_new_device() to i2c_new_client_device()

  Wolfram Sang has asked to have this included in 5.7 so the deprecated
  API can be removed next release. There should be no functional
  difference.

  I think that entire this section of code can be removed; it is
  leftover from other things that have since changed, but this is the
  safer thing to do for now. The full removal can happen next release"

* tag 'for-linus-5.7-2' of git://github.com/cminyard/linux-ipmi:
  char: ipmi: convert to use i2c_new_client_device()

3bfa7e14 ("fs/seq_file.c: seq_read(): add info message about buggy .next functions")
showed that we don't use seq_file correctly.
So make sure that our ->next function always updates the position.

Fixes: 7bccd12d

 ("ubi: Add debugfs file for tracking PEB state")
Signed-off-by: Richard Weinberger <richard@nod.at>

crypto_shash_descsize() returns the size of the shash_desc context
needed to compute the hash, not the size of the hash itself.

crypto_shash_digestsize() would be correct, or alternatively using
c->hash_len and c->hmac_desc_len which already store the correct values.
But actually it's simpler to just use stack arrays, so do that instead.

Fixes: 49525e5e ("ubifs: Add helper functions for authentication support")
Fixes: da8ef65f

 ("ubifs: Authenticate replayed journal")
Cc: <stable@vger.kernel.org> # v4.20+
Cc: Sascha Hauer <s.hauer@pengutronix.de>
Signed-off-by: Eric Biggers <ebiggers@google.com>
Acked-by: Sascha Hauer <s.hauer@pengutronix.de>
Signed-off-by: Richard Weinberger <richard@nod.at>