swiotlb currently reports the total number of slabs and the instantaneous
in-use slabs in debugfs. But with increased usage of swiotlb for all I/O
in Confidential Computing (coco) VMs, it has become difficult to know
how much memory to allocate for swiotlb bounce buffers, either via the
automatic algorithm in the kernel or by specifying a value on the
kernel boot line. The current automatic algorithm generously allocates
swiotlb bounce buffer memory, and may be wasting significant memory in
many use cases.

To support better understanding of swiotlb usage, add tracking of the
the high water mark for usage of the default swiotlb bounce buffer memory
pool and any reserved memory pools. Report these high water marks in
debugfs along with the other swiotlb pool metrics.  Allow the high water
marks to be reset to zero at runtime by writing to them.
Signed-off-by: Michael Kelley <mikelley@microsoft.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>

For io_tlb_nslabs, the debugfs code reports the correct value for a
specific reserved memory pool.  But for io_tlb_used, the value reported
is always for the default pool, not the specific reserved pool. Fix this.

Fixes: 5c850d31 ("swiotlb: fix passing local variable to debugfs_create_ulong()")
Signed-off-by: Michael Kelley <mikelley@microsoft.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>

The reservedmem_of_init_fn's are invoked very early at boot before the
memory zones have even been defined. This makes it inappropriate to test
whether the page corresponding to a PFN is in ZONE_HIGHMEM from within
one.

Removing the check allows an ARM 32-bit kernel with SPARSEMEM enabled to
boot properly since otherwise we would be de-referencing an
uninitialized sparsemem map to perform pfn_to_page() check.

The arm64 architecture happens to work (and also has no high memory) but
other 32-bit architectures could also be having similar issues.

While it would be nice to provide early feedback about a reserved DMA
pool residing in highmem, it is not possible to do that until the first
time we try to use it, which is where the check is moved to.

Fixes: 0b84e4f8 ("swiotlb: Add restricted DMA pool initialization")
Signed-off-by: Doug Berger <opendmb@gmail.com>
Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>

As for now all arches have dma_default_coherent reflecting default
DMA coherency for of devices, so there is no need to have a standalone
config option.
Signed-off-by: Jiaxun Yang <jiaxun.yang@flygoat.com>
Reviewed-by: Rob Herring <robh@kernel.org>
Acked-by: Michael Ellerman <mpe@ellerman.id.au> (powerpc)
Signed-off-by: Christoph Hellwig <hch@lst.de>

Provide a kconfig option to allow arches to manipulate default
value of dma_default_coherent in Kconfig.
Signed-off-by: Jiaxun Yang <jiaxun.yang@flygoat.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>

dma_default_coherent was decleared unconditionally at kernel/dma/mapping.c
but only decleared when any of non-coherent options is enabled in
dma-map-ops.h.

Guard the declaration in mapping.c with non-coherent options and provide
a fallback definition.
Signed-off-by: Jiaxun Yang <jiaxun.yang@flygoat.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>

On 32-bit without LPAE:

    kernel/dma/debug.c: In function ‘debug_dma_dump_mappings’:
    kernel/dma/debug.c:537:7: warning: format ‘%llx’ expects argument of type ‘long long unsigned int’, but argument 9 has type ‘phys_addr_t’ {aka ‘unsigned int’} [-Wformat=]
    kernel/dma/debug.c: In function ‘dump_show’:
    kernel/dma/debug.c:568:59: warning: format ‘%llx’ expects argument of type ‘long long unsigned int’, but argument 11 has type ‘phys_addr_t’ {aka ‘unsigned int’} [-Wformat=]

Fixes: bd89d69a ("dma-debug: add cacheline to user/kernel space dump messages")
Reported-by: kernel test robot <lkp@intel.com>
Link: https://lore.kernel.org/r/202303160548.ReyuTsGD-lkp@intel.com
Reported-by: noreply@ellerman.id.au
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Signed-off-by: Christoph Hellwig <hch@lst.de>

Having the cacheline also printed on the debug_dma_dump_mappings() and
dump_show() is useful for debugging. Furthermore, this also standardizes
the messages shown on both dump functions.
Signed-off-by: Desnes Nunes <desnesn@redhat.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>

Small update on dma_debug_entry's struct commentary and also standardize
the usage of 'dma_addr' variable name from debug_dma_map_page() on
debug_dma_unmap_page(), and similarly on debug_dma_free_coherent()
Signed-off-by: Desnes Nunes <desnesn@redhat.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>

Since both callers of dma_direct_optimal_gfp_mask() pass
dev->coherent_dma_mask as the second argument, it is better to
remove that parameter altogether.

Not only is reducing number of parameters good for readability, but
the new function signature is also more logical: The optimal flags
depend only on data contained in struct device.

While touching this code, let's also rename phys_mask to phys_limit
in dma_direct_alloc_from_pool(), because it is indeed a limit.
Signed-off-by: Petr Tesarik <petrtesarik@huaweicloud.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>

Explicit alignment and page alignment are used only to calculate
the stride, not when checking actual slot physical address.

Originally, only page alignment was implemented, and that worked,
because the whole SWIOTLB is allocated on a page boundary, so
aligning the start index was sufficient to ensure a page-aligned
slot.

When commit 1f221a0d ("swiotlb: respect min_align_mask") added
support for min_align_mask, the index could be incremented in the
search loop, potentially finding an unaligned slot if minimum device
alignment is between IO_TLB_SIZE and PAGE_SIZE.  The bug could go
unnoticed, because the slot size is 2 KiB, and the most common page
size is 4 KiB, so there is no alignment value in between.

IIUC the intention has been to find a slot that conforms to all
alignment constraints: device minimum alignment, an explicit
alignment (given as function parameter) and optionally page
alignment (if allocation size is >= PAGE_SIZE). The most
restrictive mask can be trivially computed with logical AND. The
rest can stay.

Fixes: 1f221a0d ("swiotlb: respect min_align_mask")
Fixes: e81e99ba ("swiotlb: Support aligned swiotlb buffers")
Signed-off-by: Petr Tesarik <petr.tesarik.ext@huawei.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>

No functional change, just use an existing helper.
Signed-off-by: Petr Tesarik <petr.tesarik.ext@huawei.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>

In general, if swiotlb is sufficient, the logic of index =
wrap_area_index(mem, index + 1) is fine, it will quickly take a slot and
release the area->lock; But if swiotlb is insufficient and the device
has min_align_mask requirements, such as NVME, we may not be able to
satisfy index == wrap and exit the loop properly. In this case, other
kernel threads will not be able to acquire the area->lock and release
the slot, resulting in a deadlock.

The current implementation of wrap_area_index does not involve a modulo
operation, so adjusting the wrap to ensure the loop ends is not trivial.
Introduce a new variable to record the number of loops and exit the loop
after completing the traversal.

Backtraces:
Other CPUs are waiting this core to exit the swiotlb_do_find_slots
loop.
[10199.924391] RIP: 0010:swiotlb_do_find_slots+0x1fe/0x3e0
[10199.924403] Call Trace:
[10199.924404]  <TASK>
[10199.924405]  swiotlb_tbl_map_single+0xec/0x1f0
[10199.924407]  swiotlb_map+0x5c/0x260
[10199.924409]  ? nvme_pci_setup_prps+0x1ed/0x340
[10199.924411]  dma_direct_map_page+0x12e/0x1c0
[10199.924413]  nvme_map_data+0x304/0x370
[10199.924415]  nvme_prep_rq.part.0+0x31/0x120
[10199.924417]  nvme_queue_rq+0x77/0x1f0

...
[ 9639.596311] NMI backtrace for cpu 48
[ 9639.596336] Call Trace:
[ 9639.596337]
[ 9639.596338] _raw_spin_lock_irqsave+0x37/0x40
[ 9639.596341] swiotlb_do_find_slots+0xef/0x3e0
[ 9639.596344] swiotlb_tbl_map_single+0xec/0x1f0
[ 9639.596347] swiotlb_map+0x5c/0x260
[ 9639.596349] dma_direct_map_sg+0x7a/0x280
[ 9639.596352] __dma_map_sg_attrs+0x30/0x70
[ 9639.596355] dma_map_sgtable+0x1d/0x30
[ 9639.596356] nvme_map_data+0xce/0x370

...
[ 9639.595665] NMI backtrace for cpu 50
[ 9639.595682] Call Trace:
[ 9639.595682]
[ 9639.595683] _raw_spin_lock_irqsave+0x37/0x40
[ 9639.595686] swiotlb_release_slots.isra.0+0x86/0x180
[ 9639.595688] dma_direct_unmap_sg+0xcf/0x1a0
[ 9639.595690] nvme_unmap_data.part.0+0x43/0xc0

Fixes: 1f221a0d ("swiotlb: respect min_align_mask")
Signed-off-by: GuoRui.Yu <GuoRui.Yu@linux.alibaba.com>
Signed-off-by: Xiaokang Hu <xiaokang.hxk@alibaba-inc.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>

This reverts part of commit 015b8cc5 ("wifi: cfg80211: Fix use after
free for wext")

This commit broke WPA offload by unconditionally clearing the crypto
modes for non-WEP connections. Drop that part of the patch.
Signed-off-by: Hector Martin <marcan@marcan.st>
Reported-by: Ilya <me@0upti.me>
Reported-and-tested-by: Janne Grunau <j@jannau.net>
Reviewed-by: Eric Curtin <ecurtin@redhat.com>
Fixes: 015b8cc5 ("wifi: cfg80211: Fix use after free for wext")
Cc: stable@kernel.org
Link: https://lore.kernel.org/linux-wireless/ZAx0TWRBlGfv7pNl@kroah.com/T/#m11e6e0915ab8fa19ce8bc9695ab288c0fe018edfSigned-off-by: Linus Torvalds <torvalds@linux-foundation.org>

Pull tpm fixes from Jarkko Sakkinen:
 "Two additional bug fixes for v6.3"

* tag 'tpm-v6.3-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/jarkko/linux-tpmdd:
  tpm: disable hwrng for fTPM on some AMD designs
  tpm/eventlog: Don't abort tpm_read_log on faulty ACPI address

AMD has issued an advisory indicating that having fTPM enabled in
BIOS can cause "stuttering" in the OS.  This issue has been fixed
in newer versions of the fTPM firmware, but it's up to system
designers to decide whether to distribute it.

This issue has existed for a while, but is more prevalent starting
with kernel 6.1 because commit b006c439 ("hwrng: core - start
hwrng kthread also for untrusted sources") started to use the fTPM
for hwrng by default. However, all uses of /dev/hwrng result in
unacceptable stuttering.

So, simply disable registration of the defective hwrng when detecting
these faulty fTPM versions.  As this is caused by faulty firmware, it
is plausible that such a problem could also be reproduced by other TPM
interactions, but this hasn't been shown by any user's testing or reports.

It is hypothesized to be triggered more frequently by the use of the RNG
because userspace software will fetch random numbers regularly.

Intentionally continue to register other TPM functionality so that users
that rely upon PCR measurements or any storage of data will still have
access to it.  If it's found later that another TPM functionality is
exacerbating this problem a module parameter it can be turned off entirely
and a module parameter can be introduced to allow users who rely upon
fTPM functionality to turn it on even though this problem is present.

Link: https://www.amd.com/en/support/kb/faq/pa-410
Link: https://bugzilla.kernel.org/show_bug.cgi?id=216989
Link: https://lore.kernel.org/all/20230209153120.261904-1-Jason@zx2c4.com/
Fixes: b006c439 ("hwrng: core - start hwrng kthread also for untrusted sources")
Cc: stable@vger.kernel.org
Cc: Jarkko Sakkinen <jarkko@kernel.org>
Cc: Thorsten Leemhuis <regressions@leemhuis.info>
Cc: James Bottomley <James.Bottomley@hansenpartnership.com>
Tested-by: reach622@mailcuk.com
Tested-by: Bell <1138267643@qq.com>
Co-developed-by: Jason A. Donenfeld <Jason@zx2c4.com>
Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
Signed-off-by: Mario Limonciello <mario.limonciello@amd.com>
Reviewed-by: Jarkko Sakkinen <jarkko@kernel.org>
Signed-off-by: Jarkko Sakkinen <jarkko@kernel.org>

tpm_read_log_acpi() should return -ENODEV when no eventlog from the ACPI
table is found. If the firmware vendor includes an invalid log address
we are unable to map from the ACPI memory and tpm_read_log() returns -EIO
which would abort discovery of the eventlog.

Change the return value from -EIO to -ENODEV when acpi_os_map_iomem()
fails to map the event log.

The following hardware was used to test this issue:
    Framework Laptop (Pre-production)
    BIOS: INSYDE Corp, Revision: 3.2
    TPM Device: NTC, Firmware Revision: 7.2

Dump of the faulty ACPI TPM2 table:
    [000h 0000   4]                    Signature : "TPM2"    [Trusted Platform Module hardware interface Table]
    [004h 0004   4]                 Table Length : 0000004C
    [008h 0008   1]                     Revision : 04
    [009h 0009   1]                     Checksum : 2B
    [00Ah 0010   6]                       Oem ID : "INSYDE"
    [010h 0016   8]                 Oem Table ID : "TGL-ULT"
    [018h 0024   4]                 Oem Revision : 00000002
    [01Ch 0028   4]              Asl Compiler ID : "ACPI"
    [020h 0032   4]        Asl Compiler Revision : 00040000

    [024h 0036   2]               Platform Class : 0000
    [026h 0038   2]                     Reserved : 0000
    [028h 0040   8]              Control Address : 0000000000000000
    [030h 0048   4]                 Start Method : 06 [Memory Mapped I/O]

    [034h 0052  12]            Method Parameters : 00 00 00 00 00 00 00 00 00 00 00 00
    [040h 0064   4]           Minimum Log Length : 00010000
    [044h 0068   8]                  Log Address : 000000004053D000

Fixes: 0cf577a0 ("tpm: Fix handling of missing event log")
Tested-by: Erkki Eilonen <erkki@bearmetal.eu>
Signed-off-by: Morten Linderud <morten@linderud.pw>
Reviewed-by: Jarkko Sakkinen <jarkko@kernel.org>
Signed-off-by: Jarkko Sakkinen <jarkko@kernel.org>

Pull xfs fixes from Darrick Wong:

 - Fix a crash if mount time quotacheck fails when there are inodes
   queued for garbage collection.

 - Fix an off by one error when discarding folios after writeback
   failure.

* tag 'xfs-6.3-fixes-1' of git://git.kernel.org/pub/scm/fs/xfs/xfs-linux:
  xfs: fix off-by-one-block in xfs_discard_folio()
  xfs: quotacheck failure can race with background inode inactivation

Pull staging driver fixes and removal from Greg KH:
 "Here are four small staging driver fixes, and one big staging driver
  deletion for 6.3-rc2.

  The fixes are:

   - rtl8192e driver fixes for where the driver was attempting to
     execute various programs directly from the disk for unknown reasons

   - rtl8723bs driver fixes for issues found by Hans in testing

  The deleted driver is the removal of the r8188eu wireless driver as
  now in 6.3-rc1 we have a "real" wifi driver for one that includes
  support for many many more devices than this old driver did. So it's
  time to remove it as it is no longer needed. The maintainers of this
  driver all have acked its removal. Many thanks to them over the years
  for working to clean it up and keep it working while the real driver
  was being developed.

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

* tag 'staging-6.3-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/staging:
  staging: r8188eu: delete driver
  staging: rtl8723bs: Pass correct parameters to cfg80211_get_bss()
  staging: rtl8723bs: Fix key-store index handling
  staging: rtl8192e: Remove call_usermodehelper starting RadioPower.sh
  staging: rtl8192e: Remove function ..dm_check_ac_dc_power calling a script

Pull x86 fix from Borislav Petkov:
 "A single erratum fix for AMD machines:

   - Disable XSAVES on AMD Zen1 and Zen2 machines due to an erratum. No
     impact to anything as those machines will fallback to XSAVEC which
     is equivalent there"

* tag 'x86_urgent_for_v6.3_rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  x86/CPU/AMD: Disable XSAVES on AMD family 0x17

Pull clone3 fix from Christian Brauner:
 "A simple fix for the clone3() system call.

  The CLONE_NEWTIME allows the creation of time namespaces. The flag
  reuses a bit from the CSIGNAL bits that are used in the legacy clone()
  system call to set the signal that gets sent to the parent after the
  child exits.

  The clone3() system call doesn't rely on CSIGNAL anymore as it uses a
  dedicated .exit_signal field in struct clone_args. So we blocked all
  CSIGNAL bits in clone3_args_valid(). When CLONE_NEWTIME was introduced
  and reused a CSIGNAL bit we forgot to adapt clone3_args_valid()
  causing CLONE_NEWTIME with clone3() to be rejected. Fix this"

* tag 'kernel.fork.v6.3-rc2' of gitolite.kernel.org:pub/scm/linux/kernel/git/brauner/linux:
  selftests/clone3: test clone3 with CLONE_NEWTIME
  fork: allow CLONE_NEWTIME in clone3 flags

Pull vfs fixes from Christian Brauner:

 - When allocating pages for a watch queue failed, we didn't return an
   error causing userspace to proceed even though all subsequent
   notifcations would be lost. Make sure to return an error.

 - Fix a misformed tree entry for the idmapping maintainers entry.

 - When setting file leases from an idmapped mount via
   generic_setlease() we need to take the idmapping into account
   otherwise taking a lease would fail from an idmapped mount.

 - Remove two redundant assignments, one in splice code and the other in
   locks code, that static checkers complained about.

* tag 'vfs.misc.v6.3-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/vfs/idmapping:
  filelocks: use mount idmapping for setlease permission check
  fs/locks: Remove redundant assignment to cmd
  splice: Remove redundant assignment to ret
  MAINTAINERS: repair a malformed T: entry in IDMAPPED MOUNTS
  watch_queue: fix IOC_WATCH_QUEUE_SET_SIZE alloc error paths

Pull ext4 fixes from Ted Ts'o:
 "Bug fixes and regressions for ext4, the most serious of which is a
  potential deadlock during directory renames that was introduced during
  the merge window discovered by a combination of syzbot and lockdep"

* tag 'ext4_for_linus_stable' of git://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4:
  ext4: zero i_disksize when initializing the bootloader inode
  ext4: make sure fs error flag setted before clear journal error
  ext4: commit super block if fs record error when journal record without error
  ext4, jbd2: add an optimized bmap for the journal inode
  ext4: fix WARNING in ext4_update_inline_data
  ext4: move where set the MAY_INLINE_DATA flag is set
  ext4: Fix deadlock during directory rename
  ext4: Fix comment about the 64BIT feature
  docs: ext4: modify the group desc size to 64
  ext4: fix another off-by-one fsmap error on 1k block filesystems
  ext4: fix RENAME_WHITEOUT handling for inline directories
  ext4: make kobj_type structures constant
  ext4: fix cgroup writeback accounting with fs-layer encryption

The cpumask_check() was unnecessarily tight, and causes problems for the
users of cpumask_next().

We have a number of users that take the previous return value of one of
the bit scanning functions and subtract one to keep it in "range".  But
since the scanning functions end up returning up to 'small_cpumask_bits'
instead of the tighter 'nr_cpumask_bits', the range really needs to be
using that widened form.

[ This "previous-1" behavior is also the reason we have all those
  comments about /* -1 is a legal arg here. */ and separate checks for
  that being ok.  So we could have just made "small_cpumask_bits-1"
  be a similar special "don't check this" value.

  Tetsuo Handa even suggested a patch that only does that for
  cpumask_next(), since that seems to be the only actual case that
  triggers, but that all makes it even _more_ magical and special. So
  just relax the check ]

One example of this kind of pattern being the 'c_start()' function in
arch/x86/kernel/cpu/proc.c, but also duplicated in various forms on
other architectures.

Reported-by: syzbot+96cae094d90877641f32@syzkaller.appspotmail.com
Link: https://syzkaller.appspot.com/bug?extid=96cae094d90877641f32Reported-by: Tetsuo Handa <penguin-kernel@i-love.sakura.ne.jp>
Link: https://lore.kernel.org/lkml/c1f4cc16-feea-b83c-82cf-1a1f007b7eb9@I-love.SAKURA.ne.jp/
Fixes: 596ff4a0 ("cpumask: re-introduce constant-sized cpumask optimizations")
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

Pull i2c updates from Wolfram Sang:
 "This marks the end of a transition to let I2C have the same probe
  semantics as other subsystems. Uwe took care that no drivers in the
  current tree nor in -next use the deprecated .probe call. So, it is a
  good time to switch to the new, standard semantics now.

  There is also a regression fix:

   - regression fix for the notifier handling of the I2C core

   - final coversions of drivers away from deprecated .probe

   - make .probe_new the standard probe and convert I2C core to use it

* tag 'i2c-for-6.3-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux:
  i2c: dev: Fix bus callback return values
  i2c: Convert drivers to new .probe() callback
  i2c: mux: Convert all drivers to new .probe() callback
  i2c: Switch .probe() to not take an id parameter
  media: i2c: ov2685: convert to i2c's .probe_new()
  media: i2c: ov5695: convert to i2c's .probe_new()
  w1: ds2482: Convert to i2c's .probe_new()
  serial: sc16is7xx: Convert to i2c's .probe_new()
  mtd: maps: pismo: Convert to i2c's .probe_new()
  misc: ad525x_dpot-i2c: Convert to i2c's .probe_new()

Switching to BLK_MQ_F_BLOCKING wrongly removed the call to
blk_mq_end_request(). Add it back to have our IOs finished

Fixes: 91cc8fbc ("ubi: block: set BLK_MQ_F_BLOCKING")
Analyzed-by: Linus Torvalds <torvalds@linux-foundation.org>
Reported-by: Daniel Palmer <daniel@0x0f.com>
Link: https://lore.kernel.org/linux-mtd/CAHk-=wi29bbBNh3RqJKu3PxzpjDN5D5K17gEVtXrb7-6bfrnMQ@mail.gmail.com/Signed-off-by: Richard Weinberger <richard@nod.at>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Tested-by: Daniel Palmer <daniel@0x0f.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

If the boot loader inode has never been used before, the
EXT4_IOC_SWAP_BOOT inode will initialize it, including setting the
i_size to 0.  However, if the "never before used" boot loader has a
non-zero i_size, then i_disksize will be non-zero, and the
inconsistency between i_size and i_disksize can trigger a kernel
warning:

 WARNING: CPU: 0 PID: 2580 at fs/ext4/file.c:319
 CPU: 0 PID: 2580 Comm: bb Not tainted 6.3.0-rc1-00004-g703695902cfa
 RIP: 0010:ext4_file_write_iter+0xbc7/0xd10
 Call Trace:
  vfs_write+0x3b1/0x5c0
  ksys_write+0x77/0x160
  __x64_sys_write+0x22/0x30
  do_syscall_64+0x39/0x80

Reproducer:
 1. create corrupted image and mount it:
       mke2fs -t ext4 /tmp/foo.img 200
       debugfs -wR "sif <5> size 25700" /tmp/foo.img
       mount -t ext4 /tmp/foo.img /mnt
       cd /mnt
       echo 123 > file
 2. Run the reproducer program:
       posix_memalign(&buf, 1024, 1024)
       fd = open("file", O_RDWR | O_DIRECT);
       ioctl(fd, EXT4_IOC_SWAP_BOOT);
       write(fd, buf, 1024);

Fix this by setting i_disksize as well as i_size to zero when
initiaizing the boot loader inode.

Link: https://bugzilla.kernel.org/show_bug.cgi?id=217159
Cc: stable@kernel.org
Signed-off-by: Zhihao Cheng <chengzhihao1@huawei.com>
Link: https://lore.kernel.org/r/20230308032643.641113-1-chengzhihao1@huawei.comSigned-off-by: Theodore Ts'o <tytso@mit.edu>

Now, jounral error number maybe cleared even though ext4_commit_super()
failed. This may lead to error flag miss, then fsck will miss to check
file system deeply.
Signed-off-by: Ye Bin <yebin10@huawei.com>
Reviewed-by: Jan Kara <jack@suse.cz>
Link: https://lore.kernel.org/r/20230307061703.245965-3-yebin@huaweicloud.com

Now, 'es->s_state' maybe covered by recover journal. And journal errno
maybe not recorded in journal sb as IO error. ext4_update_super() only
update error information when 'sbi->s_add_error_count' large than zero.
Then 'EXT4_ERROR_FS' flag maybe lost.
To solve above issue just recover 'es->s_state' error flag after journal
replay like error info.
Signed-off-by: Ye Bin <yebin10@huawei.com>
Reviewed-by: Baokun Li <libaokun1@huawei.com>
Reviewed-by: Jan Kara <jack@suse.cz>
Link: https://lore.kernel.org/r/20230307061703.245965-2-yebin@huaweicloud.com

The generic bmap() function exported by the VFS takes locks and does
checks that are not necessary for the journal inode.  So allow the
file system to set a journal-optimized bmap function in
journal->j_bmap.

Reported-by: syzbot+9543479984ae9e576000@syzkaller.appspotmail.com
Link: https://syzkaller.appspot.com/bug?id=e4aaa78795e490421c79f76ec3679006c8ff4cf0Signed-off-by: Theodore Ts'o <tytso@mit.edu>

Syzbot found the following issue:
EXT4-fs (loop0): mounted filesystem 00000000-0000-0000-0000-000000000000 without journal. Quota mode: none.
fscrypt: AES-256-CTS-CBC using implementation "cts-cbc-aes-aesni"
fscrypt: AES-256-XTS using implementation "xts-aes-aesni"
------------[ cut here ]------------
WARNING: CPU: 0 PID: 5071 at mm/page_alloc.c:5525 __alloc_pages+0x30a/0x560 mm/page_alloc.c:5525
Modules linked in:
CPU: 1 PID: 5071 Comm: syz-executor263 Not tainted 6.2.0-rc1-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022
RIP: 0010:__alloc_pages+0x30a/0x560 mm/page_alloc.c:5525
RSP: 0018:ffffc90003c2f1c0 EFLAGS: 00010246
RAX: ffffc90003c2f220 RBX: 0000000000000014 RCX: 0000000000000000
RDX: 0000000000000028 RSI: 0000000000000000 RDI: ffffc90003c2f248
RBP: ffffc90003c2f2d8 R08: dffffc0000000000 R09: ffffc90003c2f220
R10: fffff52000785e49 R11: 1ffff92000785e44 R12: 0000000000040d40
R13: 1ffff92000785e40 R14: dffffc0000000000 R15: 1ffff92000785e3c
FS:  0000555556c0d300(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f95d5e04138 CR3: 00000000793aa000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 __alloc_pages_node include/linux/gfp.h:237 [inline]
 alloc_pages_node include/linux/gfp.h:260 [inline]
 __kmalloc_large_node+0x95/0x1e0 mm/slab_common.c:1113
 __do_kmalloc_node mm/slab_common.c:956 [inline]
 __kmalloc+0xfe/0x190 mm/slab_common.c:981
 kmalloc include/linux/slab.h:584 [inline]
 kzalloc include/linux/slab.h:720 [inline]
 ext4_update_inline_data+0x236/0x6b0 fs/ext4/inline.c:346
 ext4_update_inline_dir fs/ext4/inline.c:1115 [inline]
 ext4_try_add_inline_entry+0x328/0x990 fs/ext4/inline.c:1307
 ext4_add_entry+0x5a4/0xeb0 fs/ext4/namei.c:2385
 ext4_add_nondir+0x96/0x260 fs/ext4/namei.c:2772
 ext4_create+0x36c/0x560 fs/ext4/namei.c:2817
 lookup_open fs/namei.c:3413 [inline]
 open_last_lookups fs/namei.c:3481 [inline]
 path_openat+0x12ac/0x2dd0 fs/namei.c:3711
 do_filp_open+0x264/0x4f0 fs/namei.c:3741
 do_sys_openat2+0x124/0x4e0 fs/open.c:1310
 do_sys_open fs/open.c:1326 [inline]
 __do_sys_openat fs/open.c:1342 [inline]
 __se_sys_openat fs/open.c:1337 [inline]
 __x64_sys_openat+0x243/0x290 fs/open.c:1337
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x63/0xcd

Above issue happens as follows:
ext4_iget
   ext4_find_inline_data_nolock ->i_inline_off=164 i_inline_size=60
ext4_try_add_inline_entry
   __ext4_mark_inode_dirty
      ext4_expand_extra_isize_ea ->i_extra_isize=32 s_want_extra_isize=44
         ext4_xattr_shift_entries
	 ->after shift i_inline_off is incorrect, actually is change to 176
ext4_try_add_inline_entry
  ext4_update_inline_dir
    get_max_inline_xattr_value_size
      if (EXT4_I(inode)->i_inline_off)
	entry = (struct ext4_xattr_entry *)((void *)raw_inode +
			EXT4_I(inode)->i_inline_off);
        free += EXT4_XATTR_SIZE(le32_to_cpu(entry->e_value_size));
	->As entry is incorrect, then 'free' may be negative
   ext4_update_inline_data
      value = kzalloc(len, GFP_NOFS);
      -> len is unsigned int, maybe very large, then trigger warning when
         'kzalloc()'

To resolve the above issue we need to update 'i_inline_off' after
'ext4_xattr_shift_entries()'.  We do not need to set
EXT4_STATE_MAY_INLINE_DATA flag here, since ext4_mark_inode_dirty()
already sets this flag if needed.  Setting EXT4_STATE_MAY_INLINE_DATA
when it is needed may trigger a BUG_ON in ext4_writepages().

Reported-by: syzbot+d30838395804afc2fa6f@syzkaller.appspotmail.com
Cc: stable@kernel.org
Signed-off-by: Ye Bin <yebin10@huawei.com>
Reviewed-by: Jan Kara <jack@suse.cz>
Link: https://lore.kernel.org/r/20230307015253.2232062-3-yebin@huaweicloud.comSigned-off-by: Theodore Ts'o <tytso@mit.edu>

The only caller of ext4_find_inline_data_nolock() that needs setting of
EXT4_STATE_MAY_INLINE_DATA flag is ext4_iget_extra_inode().  In
ext4_write_inline_data_end() we just need to update inode->i_inline_off.
Since we are going to add one more caller that does not need to set
EXT4_STATE_MAY_INLINE_DATA, just move setting of EXT4_STATE_MAY_INLINE_DATA
out to ext4_iget_extra_inode().
Signed-off-by: Ye Bin <yebin10@huawei.com>
Cc: stable@kernel.org
Reviewed-by: Jan Kara <jack@suse.cz>
Link: https://lore.kernel.org/r/20230307015253.2232062-2-yebin@huaweicloud.comSigned-off-by: Theodore Ts'o <tytso@mit.edu>

Pull SCSI fixes from James Bottomley:
 "Twenty fixes all in drivers except the one zone storage revalidation
  fix to sd.

  The megaraid_sas fixes are more on the level of a driver update
  (enabling crash dump and increasing lun number) but I thought you
  could let this slide on -rc1 and the next most extensive update is a
  load of fixes to mpi3mr"

* tag 'scsi-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi:
  scsi: sd: Fix wrong zone_write_granularity value during revalidate
  scsi: storvsc: Handle BlockSize change in Hyper-V VHD/VHDX file
  scsi: megaraid_sas: Driver version update to 07.725.01.00-rc1
  scsi: megaraid_sas: Add crash dump mode capability bit in MFI capabilities
  scsi: megaraid_sas: Update max supported LD IDs to 240
  scsi: mpi3mr: Bad drive in topology results kernel crash
  scsi: mpi3mr: NVMe command size greater than 8K fails
  scsi: mpi3mr: Return proper values for failures in firmware init path
  scsi: mpi3mr: Wait for diagnostic save during controller init
  scsi: mpi3mr: Driver unload crashes host when enhanced logging is enabled
  scsi: mpi3mr: ioctl timeout when disabling/enabling interrupt
  scsi: lpfc: Avoid usage of list iterator variable after loop
  scsi: lpfc: Check kzalloc() in lpfc_sli4_cgn_params_read()
  scsi: ufs: mcq: qcom: Clean the return path of ufs_qcom_mcq_config_resource()
  scsi: ufs: mcq: qcom: Fix passing zero to PTR_ERR
  scsi: ufs: ufs-qcom: Remove impossible check
  scsi: ufs: core: Add soft dependency on governor_simpleondemand
  scsi: hisi_sas: Check devm_add_action() return value
  scsi: qla2xxx: Add option to disable FC2 Target support
  scsi: target: iscsi: Fix an error message in iscsi_check_key()

Pull block fixes from Jens Axboe:

 - Fix a regression in exclusive mode handling of the partition code,
   introduced in this merge windoe (Yu)

 - Fix for a use-after-free in BFQ (Yu)

 - Add sysfs documentation for the 'hidden' attribute (Sagi)

* tag 'block-6.3-2023-03-09' of git://git.kernel.dk/linux:
  block, bfq: fix uaf for 'stable_merge_bfqq'
  docs: sysfs-block: document hidden sysfs entry
  block: fix wrong mode for blkdev_put() from disk_scan_partitions()

Pull put_and_unmap_page() helper from Al Viro:
 "kmap_local_page() conversions in local filesystems keep running into
  kunmap_local_page()+put_page() combinations.  We can keep inventing
  names for identical inline helpers, but it's getting rather
  inconvenient. I've added a trivial helper to linux/highmem.h instead.

  I would've held that back until the merge window, if not for the mess
  it causes in tree topology - I've several branches merging from that
  one, and it's only going to get worse if e.g. ext2 stuff gets picked
  by Jan"

* tag 'pull-highmem' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs:
  new helper: put_and_unmap_page()

Pull misc fixes from Al Viro:
 "pick_file() speculation fix + fix for alpha mis(merge,cherry-pick)

  The fs/file.c one is a genuine missing speculation barrier in
  pick_file() (reachable e.g. via close(2)). The alpha one is strictly
  speaking not a bug fix, but only because confusion between
  preempt_enable() and preempt_disable() is harmless on architecture
  without CONFIG_PREEMPT.

  Looks like alpha.git picked the wrong version of patch - that braino
  used to be there in early versions, but it had been fixed quite a
  while ago..."

* tag 'pull-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs:
  fs: prevent out-of-bounds array speculation when closing a file descriptor
  alpha: fix lazy-FPU mis(merged/applied/whatnot)

Pull thermal control fix from Rafael Wysocki:
 "Fix a recently introduced deadlock in the int340x thermal control
  driver (Srinivas Pandruvada)"

* tag 'thermal-6.3-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm:
  thermal: intel: int340x: processor_thermal: Fix deadlock

Pull RISC-V fixes from Palmer Dabbelt:

 - RISC-V architecture-specific ELF attributes have been disabled in the
   kernel builds

 - A fix for a locking failure while during errata patching that
   manifests on SiFive-based systems

 - A fix for a KASAN failure during stack unwinding

 - A fix for some lockdep failures during text patching

* tag 'riscv-for-linus-6.3-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/riscv/linux:
  RISC-V: Don't check text_mutex during stop_machine
  riscv: Use READ_ONCE_NOCHECK in imprecise unwinding stack mode
  RISC-V: fix taking the text_mutex twice during sifive errata patching
  RISC-V: Stop emitting attributes

Pull drm fixes from Dave Airlie:
 "Weekly fixes.

  msm and amdgpu are the vast majority of these, otherwise some
  straggler misc from last week for nouveau and cirrus and a mailmap
  update for a drm developer.

  mailmap:
   - add an entry

  nouveau:
   - fix system shutdown regression
   - build warning fix

  cirrus:
   - NULL ptr deref fix

  msm:
   - fix invalid ptr free in syncobj cleanup
   - sync GMU removal in teardown
   - a5xx preemption fixes
   - fix runpm imbalance
   - DPU hw fixes
   - stack corruption fix
   - clear DSPP reservation

  amdgpu:
   - Misc display fixes
   - UMC 8.10 fixes
   - Driver unload fixes
   - NBIO 7.3.0 fix
   - Error checking fixes for soc15, nv, soc21 read register interface
   - Fix video cap query for VCN 4.0.4

  amdkfd:
   - Fix return check in doorbell handling"

* tag 'drm-fixes-2023-03-10' of git://anongit.freedesktop.org/drm/drm: (42 commits)
  drm/amdgpu/soc21: Add video cap query support for VCN_4_0_4
  drm/amdgpu: fix error checking in amdgpu_read_mm_registers for nv
  drm/amdgpu: fix error checking in amdgpu_read_mm_registers for soc21
  drm/amdgpu: fix error checking in amdgpu_read_mm_registers for soc15
  drm/amdgpu: Fix the warning info when removing amdgpu device
  drm/amdgpu: fix return value check in kfd
  drm/amd: Fix initialization mistake for NBIO 7.3.0
  drm/amdgpu: Fix call trace warning and hang when removing amdgpu device
  mailmap: add mailmap entries for Faith.
  drm/msm: DEVFREQ_GOV_SIMPLE_ONDEMAND is no longer needed
  drm/amd/display: Update clock table to include highest clock setting
  drm/amd/pm: Enable ecc_info table support for smu v13_0_10
  drm/amdgpu: Support umc node harvest config on umc v8_10
  drm/connector: print max_requested_bpc in state debugfs
  drm/display: Don't block HDR_OUTPUT_METADATA on unknown EOTF
  drm/msm/dpu: clear DSPP reservations in rm release
  drm/msm/disp/dpu: fix sc7280_pp base offset
  drm/msm/dpu: fix stack smashing in dpu_hw_ctl_setup_blendstage
  drm/msm/dpu: don't use DPU_CLK_CTRL_CURSORn for DMA SSPP clocks
  drm/msm/dpu: fix clocks settings for msm8998 SSPP blocks
  ...