The function btrfs_copy_from_user() handles the folio dirtying for
buffered write. The original design is to allow that function to handle
multiple folios, but since commit c87c299776 ("btrfs: make buffered
write to copy one page a time") there is no need to support multiple
folios.
So here open-code btrfs_copy_from_user() to
copy_folio_from_iter_atomic() and flush_dcache_folio() calls.
The short-copy check and revert are still kept as-is.
Signed-off-by: Qu Wenruo <wqu@suse.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
[WARNING]
There are several warnings about the recently introduced qgroup
auto-removal that it triggers WARN_ON() for the non-zero rfer/excl
numbers, e.g:
------------[ cut here ]------------
WARNING: CPU: 67 PID: 2882 at fs/btrfs/qgroup.c:1854 btrfs_remove_qgroup+0x3df/0x450
CPU: 67 UID: 0 PID: 2882 Comm: btrfs-cleaner Kdump: loaded Not tainted 6.11.6-300.fc41.x86_64 #1
RIP: 0010:btrfs_remove_qgroup+0x3df/0x450
Call Trace:
<TASK>
btrfs_qgroup_cleanup_dropped_subvolume+0x97/0xc0
btrfs_drop_snapshot+0x44e/0xa80
btrfs_clean_one_deleted_snapshot+0xc3/0x110
cleaner_kthread+0xd8/0x130
kthread+0xd2/0x100
ret_from_fork+0x34/0x50
ret_from_fork_asm+0x1a/0x30
</TASK>
---[ end trace 0000000000000000 ]---
BTRFS warning (device sda): to be deleted qgroup 0/319 has non-zero numbers, rfer 258478080 rfer_cmpr 258478080 excl 0 excl_cmpr 0
[CAUSE]
Although the root cause is still unclear, as if qgroup is consistent a
fully dropped subvolume (with extra transaction committed) should lead
to all zero numbers for the qgroup.
My current guess is the subvolume drop triggered the new subtree drop
threshold thus marked qgroup inconsistent, then rescan cleared it but
some corner case is not properly handled during subvolume dropping.
But at least for this particular case, since it's only the rfer/excl not
properly reset to 0, and qgroup is already marked inconsistent, there is
nothing to be worried for the end users.
The user space tool utilizing qgroup would queue a rescan to handle
everything, so the kernel wanring is a little overkilled.
[ENHANCEMENT]
Enhance the warning inside btrfs_remove_qgroup() by:
- Only do WARN() if CONFIG_BTRFS_DEBUG is enabled
As explained the kernel can handle inconsistent qgroups by simply do a
rescan, there is nothing to bother the end users.
- Treat the reserved space leak the same as non-zero numbers
By outputting the values and trigger a WARN() if it's a debug build.
So far I haven't experienced any case related to reserved space so I
hope we will never need to bother them.
Fixes: 839d6ea4f8 ("btrfs: automatically remove the subvolume qgroup")
Link: https://github.com/kdave/btrfs-progs/issues/922
Signed-off-by: Qu Wenruo <wqu@suse.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
We don't ever look at this list, remove it.
Reviewed-by: Boris Burkov <boris@bur.io>
Signed-off-by: Josef Bacik <josef@toxicpanda.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
Before we were keeping all of our nodes on various lists in order to
make sure everything got cleaned up correctly. We used node->lowest to
indicate that node->lower was linked into the cache->leaves list. Now
that we do cleanup based on the rb-tree both the list and the flag are
useless, so delete them both.
Reviewed-by: Boris Burkov <boris@bur.io>
Signed-off-by: Josef Bacik <josef@toxicpanda.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
We rely on finding all our nodes on the various lists in the backref
cache, when they are all also in the rbtree. Instead just search
through the rbtree and free everything.
Reviewed-by: Boris Burkov <boris@bur.io>
Signed-off-by: Josef Bacik <josef@toxicpanda.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
Now that we handle relocation for non-shareable roots without using the
backref cache, remove the ->cowonly field from the backref nodes and
update the handling to throw an error.
Reviewed-by: Boris Burkov <boris@bur.io>
Signed-off-by: Josef Bacik <josef@toxicpanda.com>
Signed-off-by: David Sterba <dsterba@suse.com>
We already determine the owner for any blocks we find when we're
relocating, and for COW-only blocks (and the data reloc tree) we COW
down to the block and call it good enough. However we still build a
whole backref tree for them, even though we're not going to use it, and
then just don't put these blocks in the cache.
Rework the code to check if the block belongs to a COW-only root or the
data reloc root, and then just cow down to the block, skipping the
backref cache generation.
Reviewed-by: Boris Burkov <boris@bur.io>
Signed-off-by: Josef Bacik <josef@toxicpanda.com>
Signed-off-by: David Sterba <dsterba@suse.com>
Since we no longer maintain backref cache across transactions, and this
is only called when we're creating the reloc root for a newly created
snapshot in the transaction critical section, we will end up doing a
bunch of work that will just get thrown away when we start the
transaction in the relocation loop. Delete this code as it no longer
does anything for us.
Reviewed-by: Boris Burkov <boris@bur.io>
Signed-off-by: Josef Bacik <josef@toxicpanda.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
We have this setup as a loop, but in reality we will never walk back up
the backref tree, if we do then it's a bug. Get rid of the loop and
handle the case where we have node->new_bytenr set at all. Previous
check was only if node->new_bytenr != root->node->start, but if it did
then we would hit the WARN_ON() and walk back up the tree.
Instead we want to just return error if ->new_bytenr is set, and then do
the normal updating of the node for the reloc root and carry on.
Reviewed-by: Boris Burkov <boris@bur.io>
Signed-off-by: Josef Bacik <josef@toxicpanda.com>
Signed-off-by: David Sterba <dsterba@suse.com>
Add a comment for this field so we know what it is used for. Previously
we used it to update the backref cache, so people may mistakenly think
it is useless, but in fact exists to make sure the backref cache makes
sense.
Reviewed-by: Boris Burkov <boris@bur.io>
Signed-off-by: Josef Bacik <josef@toxicpanda.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
Now that we're not updating the backref cache when we switch transids we
can remove the changed list.
We're going to keep the new_bytenr field because it serves as a good
sanity check for the backref cache and relocation, and can prevent us
from making extent tree corruption worse.
Reviewed-by: Boris Burkov <boris@bur.io>
Signed-off-by: Josef Bacik <josef@toxicpanda.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
This BUG_ON is meant to catch backref cache problems, but these can
arise from either bugs in the backref cache or corruption in the extent
tree. Fix it to be a proper error.
Reviewed-by: Boris Burkov <boris@bur.io>
Signed-off-by: Josef Bacik <josef@toxicpanda.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
A data race occurs when the function `insert_ordered_extent_file_extent()`
and the function `btrfs_inode_safe_disk_i_size_write()` are executed
concurrently. The function `insert_ordered_extent_file_extent()` is not
locked when reading inode->disk_i_size, causing
`btrfs_inode_safe_disk_i_size_write()` to cause data competition when
writing inode->disk_i_size, thus affecting the value of `modify_tree`.
The specific call stack that appears during testing is as follows:
============DATA_RACE============
btrfs_drop_extents+0x89a/0xa060 [btrfs]
insert_reserved_file_extent+0xb54/0x2960 [btrfs]
insert_ordered_extent_file_extent+0xff5/0x1760 [btrfs]
btrfs_finish_one_ordered+0x1b85/0x36a0 [btrfs]
btrfs_finish_ordered_io+0x37/0x60 [btrfs]
finish_ordered_fn+0x3e/0x50 [btrfs]
btrfs_work_helper+0x9c9/0x27a0 [btrfs]
process_scheduled_works+0x716/0xf10
worker_thread+0xb6a/0x1190
kthread+0x292/0x330
ret_from_fork+0x4d/0x80
ret_from_fork_asm+0x1a/0x30
============OTHER_INFO============
btrfs_inode_safe_disk_i_size_write+0x4ec/0x600 [btrfs]
btrfs_finish_one_ordered+0x24c7/0x36a0 [btrfs]
btrfs_finish_ordered_io+0x37/0x60 [btrfs]
finish_ordered_fn+0x3e/0x50 [btrfs]
btrfs_work_helper+0x9c9/0x27a0 [btrfs]
process_scheduled_works+0x716/0xf10
worker_thread+0xb6a/0x1190
kthread+0x292/0x330
ret_from_fork+0x4d/0x80
ret_from_fork_asm+0x1a/0x30
=================================
The main purpose of the check of the inode's disk_i_size is to avoid
taking write locks on a btree path when we have a write at or beyond
EOF, since in these cases we don't expect to find extent items in the
root to drop. However if we end up taking write locks due to a data
race on disk_i_size, everything is still correct, we only add extra
lock contention on the tree in case there's concurrency from other tasks.
If the race causes us to not take write locks when we actually need them,
then everything is functionally correct as well, since if we find out we
have extent items to drop and we took read locks (modify_tree set to 0),
we release the path and retry again with write locks.
Since this data race does not affect the correctness of the function,
it is a harmless data race, use data_race() to check inode->disk_i_size.
Reviewed-by: Filipe Manana <fdmanana@suse.com>
Signed-off-by: Hao-ran Zheng <zhenghaoran154@gmail.com>
Signed-off-by: Filipe Manana <fdmanana@suse.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
btrfs_drop_extents() calls BUG_ON() in case the counter of to be deleted
extents is greater than 0. But all of these code paths can handle errors,
so there's no need to crash the kernel. Instead WARN() that the condition
has been met and gracefully bail out.
Reviewed-by: Filipe Manana <fdmanana@suse.com>
Reviewed-by: Qu Wenruo <wqu@suse.com>
Signed-off-by: Johannes Thumshirn <johannes.thumshirn@wdc.com>
Signed-off-by: David Sterba <dsterba@suse.com>
On the zoned mode, once used and freed region is still not reusable after the
freeing. The underlying zone needs to be reset before reusing. Btrfs resets a
zone when it removes a block group, and then new block group is allocated on
the zones to reuse the zones. But, it is sometime too late to catch up with a
write side.
This commit introduces a new space-info reclaim method ZONE_RESET. That will
pick a block group from the unused list and reset its zone to reuse the
zone_unusable space. It is faster than removing the block group and re-creating
a new block group on the same zones.
For the first implementation, the ZONE_RESET is only applied to a block group
whose region is fully zone_unusable. Reclaiming partial zone_unusable block
group could be implemented later.
Signed-off-by: Naohiro Aota <naohiro.aota@wdc.com>
Signed-off-by: David Sterba <dsterba@suse.com>
Since commit e1e577aafe41 ("btrfs: store fs_info in space_info"), we have
the fs_info in a space_info. So, we can drop fs_info argument from
btrfs_update_space_info_*. There is no behavior change.
Reviewed-by: Johannes Thumshirn <johannes.thumshirn@wdc.com>
Signed-off-by: Naohiro Aota <naohiro.aota@wdc.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
Factor out a part of unpin_extent_range() that returns space back to the
space info, prioritizing global block reserve. Also, move the "len"
variable into the loop to clarify we don't need to carry it beyond an
iteration.
Reviewed-by: Johannes Thumshirn <johannes.thumshirn@wdc.com>
Signed-off-by: Naohiro Aota <naohiro.aota@wdc.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
Commit 146054090b ("btrfs: initial fsverity support") introduced
fs-verity support for btrfs, but didn't add support for
FS_IOC_READ_VERITY_METADATA to directly query the Merkle tree,
descriptor and signature blocks for fs-verity enabled files.
Add the (trival) implementation: we just need to wire it through to the
fs-verity code, the same way as is done in the other two filesystems
which support this ioctl (ext4, f2fs). The fs-verity code already has
access to the required data.
This is also safe to backport to older stable trees (5.15+) if needed.
Signed-off-by: Allison Karlitskaya <allison.karlitskaya@redhat.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
The variable ret is being initialized to zero and also later re-assigned
to zero. In both cases the assignment is redundant since the value is
never read after the assignment and hence they can be removed.
Signed-off-by: Colin Ian King <colin.i.king@gmail.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
The function btrfs_get_extent() will only return an PTR_ERR() or a valid
extent map pointer. It will not return NULL.
Thus the usage of PTR_ERR_OR_ZERO() inside submit_one_sector() is not
needed, use plain PTR_ERR() instead, and that is the only usage of
PTR_ERR_OR_ZERO() after btrfs_get_extent().
Reviewed-by: Johannes Thumshirn <johannes.thumshirn@wdc.com>
Signed-off-by: Qu Wenruo <wqu@suse.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
The recent fix for a stupid mistake I made uncovered the fact that we
don't have adequate testing in the delayed refs code, as it took a
pretty extensive and long running stress test to uncover something that
a unit test would have uncovered right away.
Fix this by adding a delayed refs self test suite. This will validate
that the btrfs_ref transformation does the correct thing, that we do the
correct thing when merging delayed refs, and that we get the delayed
refs in the order that we expect. These are all crucial to how the
delayed refs operate.
I introduced various bugs (including the original bug) into the delayed
refs code to validate that these tests caught all of the shenanigans
that I could think of.
Reviewed-by: Boris Burkov <boris@bur.io>
Signed-off-by: Josef Bacik <josef@toxicpanda.com>
Signed-off-by: David Sterba <dsterba@suse.com>
This helper is how we select the delayed ref to run once we've selected
the delayed ref head. I need this exported to add a unit test for
delayed refs, and it's more natural home is in delayed-ref.c. Rename it
to btrfs_select_delayed_ref and move it into delayed-ref.c.
Reviewed-by: Boris Burkov <boris@bur.io>
Signed-off-by: Josef Bacik <josef@toxicpanda.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
Here are a bunch of small IIO and interconnect and other driver fixes
for 6.13-rc7 to resolve reported issues. Included in here are:
- loads of iio driver fixes as a result of an audit of places where
uninitialized data would leak to userspace.
- other smaller, and normal, iio driver fixes.
- mhi driver fix
- interconnect driver fixes
- pci1xxxx driver fix
All of these have been in linux-next for a while with no reported
issues.
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Merge tag 'char-misc-6.13-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc
Pull char/misc/IIO driver fixes from Greg KH:
"Here are a bunch of small IIO and interconnect and other driver fixes
to resolve reported issues. Included in here are:
- loads of iio driver fixes as a result of an audit of places where
uninitialized data would leak to userspace.
- other smaller, and normal, iio driver fixes.
- mhi driver fix
- interconnect driver fixes
- pci1xxxx driver fix
All of these have been in linux-next for a while with no reported
issues"
* tag 'char-misc-6.13-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc: (32 commits)
misc: microchip: pci1xxxx: Resolve return code mismatch during GPIO set config
misc: microchip: pci1xxxx: Resolve kernel panic during GPIO IRQ handling
interconnect: icc-clk: check return values of devm_kasprintf()
interconnect: qcom: icc-rpm: Set the count member before accessing the flex array
iio: adc: ti-ads1119: fix sample size in scan struct for triggered buffer
iio: temperature: tmp006: fix information leak in triggered buffer
iio: inkern: call iio_device_put() only on mapped devices
iio: adc: ad9467: Fix the "don't allow reading vref if not available" case
iio: adc: at91: call input_free_device() on allocated iio_dev
iio: adc: ad7173: fix using shared static info struct
iio: adc: ti-ads124s08: Use gpiod_set_value_cansleep()
iio: adc: ti-ads1119: fix information leak in triggered buffer
iio: pressure: zpa2326: fix information leak in triggered buffer
iio: adc: rockchip_saradc: fix information leak in triggered buffer
iio: imu: kmx61: fix information leak in triggered buffer
iio: light: vcnl4035: fix information leak in triggered buffer
iio: light: bh1745: fix information leak in triggered buffer
iio: adc: ti-ads8688: fix information leak in triggered buffer
iio: dummy: iio_simply_dummy_buffer: fix information leak in triggered buffer
iio: test: Fix GTS test config
...
Here are some small driver core and debugfs fixes for 6.13-rc7 that
resolve some reported problems:
- debugfs runtime error reporting fixes
- topology cpumask race-condition fix
- MAINTAINERS file email update
All of these have been in linux-next this week with no reported issues.
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Merge tag 'driver-core-6.13-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core
Pull driver core and debugfs fixes from Greg KH:
"Here are some small driver core and debugfs fixes that resolve some
reported problems:
- debugfs runtime error reporting fixes
- topology cpumask race-condition fix
- MAINTAINERS file email update
All of these have been in linux-next this week with no reported
issues"
* tag 'driver-core-6.13-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core:
fs: debugfs: fix open proxy for unsafe files
MAINTAINERS: align Danilo's maintainer entries
topology: Keep the cpumask unchanged when printing cpumap
debugfs: fix missing mutex_destroy() in short_fops case
fs: debugfs: differentiate short fops with proxy ops
Here are some small staging driver fixes that resolve some reported
issues and have been in my tree for too long due to the holiday break.
They resolve the following issues:
- lots of gpib build-time fixes as reported by testers and 0-day
- gpib logical fixes
- mailmap fix (already in your tree, but git merge should handle it.)
All of these have been in linux-next for a while, with no reported
issues other than the duplicated change.
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Merge tag 'staging-6.13-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/staging
Pull staging driver fixes from Greg KH:
"Here are some small staging driver fixes that resolve some reported
issues and have been in my tree for too long due to the holiday break.
They resolve the following issues:
- lots of gpib build-time fixes as reported by testers and 0-day
- gpib logical fixes
- mailmap fix
All of these have been in linux-next for a while, with no reported
issues other than the duplicated change"
* tag 'staging-6.13-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/staging:
staging: gpib: mite: remove unused global functions
staging: gpib: refer to correct config symbol in tnt4882 Makefile
mailmap: update Bingwu Zhang's email address
staging: gpib: fix address space mixup
staging: gpib: use ioport_map
staging: gpib: fix pcmcia dependencies
staging: gpib: add module author and description fields
staging: gpib: fix Makefiles
staging: gpib: make global 'usec_diff' functions static
staging: gpib: Modify mismatched function name
staging: gpib: Add lower bound check for secondary address
staging: gpib: Fix erroneous removal of blank before newline
Here are 3 small serial driver fixes tree. They resolve some reported
issues:
- stm32 break control fix
- 8250 runtime pm usage counter fix
- imx driver locking fix.
All have been in my tree and linux-next for 3 weeks now, with no
reported issues:
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Merge tag 'tty-6.13-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty
Pull serial driver fixes from Greg KH:
"Here are three small serial driver fixes tree. They resolve some
reported issues:
- stm32 break control fix
- 8250 runtime pm usage counter fix
- imx driver locking fix
All have been in my tree and linux-next for three weeks now, with no
reported issues"
* tag 'tty-6.13-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty:
serial: stm32: use port lock wrappers for break control
serial: imx: Use uart_port_lock_irq() instead of uart_port_lock()
tty: serial: 8250: Fix another runtime PM usage counter underflow
Here are some small USB driver fixes and new device ids for 6.13-rc7.
Included in here are:
- usb serial new device ids
- typec bugfixes for reported issues
- dwc3 driver fixes
- chipidea driver fixes
- gadget driver fixes
- other minor fixes for reported problems.
All of these have been in linux-next for a while, with no reported
issues.
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Merge tag 'usb-6.13-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb
Pull USB fixes from Greg KH:
"Here are some small USB driver fixes and new device ids for 6.13-rc7.
Included in here are:
- usb serial new device ids
- typec bugfixes for reported issues
- dwc3 driver fixes
- chipidea driver fixes
- gadget driver fixes
- other minor fixes for reported problems.
All of these have been in linux-next for a while, with no reported
issues"
* tag 'usb-6.13-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb:
USB: serial: option: add Neoway N723-EA support
USB: serial: option: add MeiG Smart SRM815
USB: serial: cp210x: add Phoenix Contact UPS Device
usb: typec: fix pm usage counter imbalance in ucsi_ccg_sync_control()
usb-storage: Add max sectors quirk for Nokia 208
usb: gadget: midi2: Reverse-select at the right place
usb: gadget: f_fs: Remove WARN_ON in functionfs_bind
USB: core: Disable LPM only for non-suspended ports
usb: fix reference leak in usb_new_device()
usb: typec: tcpci: fix NULL pointer issue on shared irq case
usb: gadget: u_serial: Disable ep before setting port to null to fix the crash caused by port being null
usb: chipidea: ci_hdrc_imx: decrement device's refcount in .remove() and in the error path of .probe()
usb: typec: ucsi: Set orientation as none when connector is unplugged
usb: gadget: configfs: Ignore trailing LF for user strings to cdev
USB: usblp: return error when setting unsupported protocol
usb: gadget: f_uac2: Fix incorrect setting of bNumEndpoints
usb: typec: tcpm/tcpci_maxim: fix error code in max_contaminant_read_resistance_kohm()
usb: host: xhci-plat: set skip_phy_initialization if software node has XHCI_SKIP_PHY_INIT property
usb: dwc3-am62: Disable autosuspend during remove
usb: dwc3: gadget: fix writing NYET threshold
* fix a latent bug when the kernel is compiled in debug mode
* two small UCONTROL fixes and their selftests
arm64:
* always check page state in hyp_ack_unshare()
* align set_id_regs selftest with the fact that ASIDBITS field is RO
* various vPMU fixes for bugs that only affect nested virt
PPC e500:
* Fix a mostly impossible (but just wrong) case where IRQs were
never re-enabled
* Observe host permissions instead of mapping readonly host pages as
guest-writable. This fixes a NULL-pointer dereference in 6.13
* Replace brittle VMA-based attempts at building huge shadow TLB entries
with PTE lookups.
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Merge tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm
Pull kvm fixes from Paolo Bonzini:
"The largest part here is for KVM/PPC, where a NULL pointer dereference
was introduced in the 6.13 merge window and is now fixed.
There's some "holiday-induced lateness", as the s390 submaintainer put
it, but otherwise things looks fine.
s390:
- fix a latent bug when the kernel is compiled in debug mode
- two small UCONTROL fixes and their selftests
arm64:
- always check page state in hyp_ack_unshare()
- align set_id_regs selftest with the fact that ASIDBITS field is RO
- various vPMU fixes for bugs that only affect nested virt
PPC e500:
- Fix a mostly impossible (but just wrong) case where IRQs were never
re-enabled
- Observe host permissions instead of mapping readonly host pages as
guest-writable. This fixes a NULL-pointer dereference in 6.13
- Replace brittle VMA-based attempts at building huge shadow TLB
entries with PTE lookups"
* tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm:
KVM: e500: perform hugepage check after looking up the PFN
KVM: e500: map readonly host pages for read
KVM: e500: track host-writability of pages
KVM: e500: use shadow TLB entry as witness for writability
KVM: e500: always restore irqs
KVM: s390: selftests: Add has device attr check to uc_attr_mem_limit selftest
KVM: s390: selftests: Add ucontrol gis routing test
KVM: s390: Reject KVM_SET_GSI_ROUTING on ucontrol VMs
KVM: s390: selftests: Add ucontrol flic attr selftests
KVM: s390: Reject setting flic pfault attributes on ucontrol VMs
KVM: s390: vsie: fix virtual/physical address in unpin_scb()
KVM: arm64: Only apply PMCR_EL0.P to the guest range of counters
KVM: arm64: nv: Reload PMU events upon MDCR_EL2.HPME change
KVM: arm64: Use KVM_REQ_RELOAD_PMU to handle PMCR_EL0.E change
KVM: arm64: Add unified helper for reprogramming counters by mask
KVM: arm64: Always check the state from hyp_ack_unshare()
KVM: arm64: Fix set_id_regs selftest for ASIDBITS becoming unwritable
freeing the task and the bpf profiler unwinding the task's user stack
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Merge tag 'perf_urgent_for_v6.13_rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull perf fix from Borislav Petkov:
- Fix a #GP in the perf user callchain code caused by a race between
uprobe freeing the task and the bpf profiler unwinding the task's
user stack
* tag 'perf_urgent_for_v6.13_rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
uprobes: Fix race in uprobe_free_utask
- Remove a wrong BUG_ON in the early static call code which breaks Xen PVH
when booting as dom0
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Merge tag 'x86_urgent_for_v6.13_rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull x86 fixes from Borislav Petkov:
- Check whether shadow stack is active before using the ptrace regset
getter
- Remove a wrong BUG_ON in the early static call code which breaks Xen
PVH when booting as dom0
* tag 'x86_urgent_for_v6.13_rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
x86/fpu: Ensure shadow stack is active before "getting" registers
x86/static-call: Remove early_boot_irqs_disabled check to fix Xen PVH dom0
Fix a latent bug when the kernel is compiled in debug mode.
Two small UCONTROL fixes and their selftests.
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Merge tag 'kvm-s390-master-6.13-1' of https://git.kernel.org/pub/scm/linux/kernel/git/kvms390/linux into HEAD
KVM: s390: three small bugfixes
Fix a latent bug when the kernel is compiled in debug mode.
Two small UCONTROL fixes and their selftests.
- Always check page state in hyp_ack_unshare()
- Align set_id_regs selftest with the fact that ASIDBITS field is RO
- Various vPMU fixes for bugs that only affect nested virt
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Merge tag 'kvmarm-fixes-6.13-3' of https://git.kernel.org/pub/scm/linux/kernel/git/kvmarm/kvmarm into HEAD
KVM/arm64 changes for 6.13, part #3
- Always check page state in hyp_ack_unshare()
- Align set_id_regs selftest with the fact that ASIDBITS field is RO
- Various vPMU fixes for bugs that only affect nested virt
The new __kvm_faultin_pfn() function is upset by the fact that e500
KVM ignores host page permissions - __kvm_faultin requires a "writable"
outgoing argument, but e500 KVM is passing NULL.
While a simple fix would be possible that simply allows writable to
be NULL, it is quite ugly to have e500 KVM ignore completely the host
permissions and map readonly host pages as guest-writable. Merge a more
complete fix and remove the VMA-based attempts at building huge shadow TLB
entries. Using a PTE lookup, similar to what is done for x86, is better
and works with remap_pfn_range() because it does not assume that VM_PFNMAP
areas are contiguous. Note that the same incorrect logic is there in
ARM's get_vma_page_shift() and RISC-V's kvm_riscv_gstage_ioremap().
Fortunately, for e500 most of the code is already there; it just has to
be changed to compute the range from find_linux_pte()'s output rather
than find_vma(). The new code works for both VM_PFNMAP and hugetlb
mappings, so the latter is removed.
Patches 2-5 were tested by the reporter, Christian Zigotzky. Since
the difference with v1 is minimal, I am going to send it to Linus
today.
e500 KVM tries to bypass __kvm_faultin_pfn() in order to map VM_PFNMAP
VMAs as huge pages. This is a Bad Idea because VM_PFNMAP VMAs could
become noncontiguous as a result of callsto remap_pfn_range().
Instead, use the already existing host PTE lookup to retrieve a
valid host-side mapping level after __kvm_faultin_pfn() has
returned. Then find the largest size that will satisfy the
guest's request while staying within a single host PTE.
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
The new __kvm_faultin_pfn() function is upset by the fact that e500 KVM
ignores host page permissions - __kvm_faultin requires a "writable"
outgoing argument, but e500 KVM is nonchalantly passing NULL.
If the host page permissions do not include writability, the shadow
TLB entry is forcibly mapped read-only.
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Add the possibility of marking a page so that the UW and SW bits are
force-cleared. This is stored in the private info so that it persists
across multiple calls to kvmppc_e500_setup_stlbe.
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
kvmppc_e500_ref_setup is returning whether the guest TLB entry is writable,
which is than passed to kvm_release_faultin_page. This makes little sense
for two reasons: first, because the function sets up the private data for
the page and the return value feels like it has been bolted on the side;
second, because what really matters is whether the _shadow_ TLB entry is
writable. If it is not writable, the page can be released as non-dirty.
Shift from using tlbe_is_writable(gtlbe) to doing the same check on
the shadow TLB entry.
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
If find_linux_pte fails, IRQs will not be restored. This is unlikely
to happen in practice since it would have been reported as hanging
hosts, but it should of course be fixed anyway.
Cc: stable@vger.kernel.org
Reported-by: Sean Christopherson <seanjc@google.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
- tracing/kprobes: Fix to free trace_kprobe objects at a failure path
in __trace_kprobe_create() function. This fixes a memory leak.
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Merge tag 'probes-fixes-v6.13-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/trace/linux-trace
Pull probes fix from Masami Hiramatsu:
"Fix to free trace_kprobe objects at a failure path in
__trace_kprobe_create() function. This fixes a memory leak"
* tag 'probes-fixes-v6.13-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/trace/linux-trace:
tracing/kprobes: Fix to free objects when failed to copy a symbol
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Merge tag 'block-6.13-20250111' of git://git.kernel.dk/linux
Pull block fix from Jens Axboe:
"A single fix for a use-after-free in the BFQ IO scheduler"
* tag 'block-6.13-20250111' of git://git.kernel.dk/linux:
block, bfq: fix waker_bfqq UAF after bfq_split_bfqq()
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Merge tag 'io_uring-6.13-20250111' of git://git.kernel.dk/linux
Pull io_uring fixes from Jens Axboe:
- Fix for multishot timeout updates only using the updated value for
the first invocation, not subsequent ones
- Silence a false positive lockdep warning
- Fix the eventfd signaling and putting RCU logic
- Fix fault injected SQPOLL setup not clearing the task pointer in the
error path
- Fix local task_work looking at the SQPOLL thread rather than just
signaling the safe variant. Again one of those theoretical issues,
which should be closed up none the less.
* tag 'io_uring-6.13-20250111' of git://git.kernel.dk/linux:
io_uring: don't touch sqd->thread off tw add
io_uring/sqpoll: zero sqd->thread on tctx errors
io_uring/eventfd: ensure io_eventfd_signal() defers another RCU period
io_uring: silence false positive warnings
io_uring/timeout: fix multishot updates
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Merge tag '6.13-rc6-SMB3-client-fix' of git://git.samba.org/sfrench/cifs-2.6
Pull smb client fix from Steve French:
- fix unneeded session setup retry due to stale password e.g. for DFS
automounts
* tag '6.13-rc6-SMB3-client-fix' of git://git.samba.org/sfrench/cifs-2.6:
smb: client: sync the root session and superblock context passwords before automounting
Over the Christmas break, a couple of devicetree fixes came in
for Rockchips, Qualcomm and NXP/i.MX. These add some missing
board specific properties, address build time warnings,
The USB/TOG supoprt on X1 Elite regressed, so two earlier DT
changes get reverted for now.
Aside from the devicetree fixes, there is One build fix for the
stm32 firewall driver, and a defconfig change to enable SPDIF
support for i.MX.
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Merge tag 'soc-fixes-6.13-3' of git://git.kernel.org/pub/scm/linux/kernel/git/soc/soc
Pull SoC fixes from Arnd Bergmann:
"Over the Christmas break a couple of devicetree fixes came in for
Rockchips, Qualcomm and NXP/i.MX. These add some missing board
specific properties, address build time warnings,
The USB/TOG supoprt on X1 Elite regressed, so two earlier DT changes
get reverted for now.
Aside from the devicetree fixes, there is One build fix for the stm32
firewall driver, and a defconfig change to enable SPDIF support for
i.MX"
* tag 'soc-fixes-6.13-3' of git://git.kernel.org/pub/scm/linux/kernel/git/soc/soc:
firewall: remove misplaced semicolon from stm32_firewall_get_firewall
arm64: dts: rockchip: add hevc power domain clock to rk3328
arm64: dts: rockchip: Fix the SD card detection on NanoPi R6C/R6S
arm64: dts: qcom: sa8775p: fix the secure device bootup issue
Revert "arm64: dts: qcom: x1e80100: enable OTG on USB-C controllers"
Revert "arm64: dts: qcom: x1e80100-crd: enable otg on usb ports"
arm64: dts: qcom: x1e80100: Fix up BAR space size for PCIe6a
Revert "arm64: dts: qcom: x1e78100-t14s: enable otg on usb-c ports"
ARM: dts: imxrt1050: Fix clocks for mmc
ARM: imx_v6_v7_defconfig: enable SND_SOC_SPDIF
arm64: dts: imx95: correct the address length of netcmix_blk_ctrl
arm64: dts: imx8-ss-audio: add fallback compatible string fsl,imx6ull-esai for esai
arm64: dts: rockchip: rename rfkill label for Radxa ROCK 5B
arm64: dts: rockchip: add reset-names for combphy on rk3568
arm64: dts: qcom: sa8775p: Fix the size of 'addr_space' regions
Maddy is taking over the day-to-day maintenance of powerpc. I will still
be around to help, and as a backup.
Re-order the main POWERPC list to put Maddy first to reflect that.
KVM/powerpc patches will be handled by Maddy via the powerpc tree with
review from Nick, so replace myself with Maddy there.
Remove myself from BPF, leaving Hari & Christophe as maintainers.
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
In some cases, when password2 becomes the working password, the
client swaps the two password fields in the root session struct, but
not in the smb3_fs_context struct in cifs_sb. DFS automounts inherit
fs context from their parent mounts. Therefore, they might end up
getting the passwords in the stale order.
The automount should succeed, because the mount function will end up
retrying with the actual password anyway. But to reduce these
unnecessary session setup retries for automounts, we can sync the
parent context's passwords with the root session's passwords before
duplicating it to the child's fs context.
Cc: stable@vger.kernel.org
Signed-off-by: Meetakshi Setiya <msetiya@microsoft.com>
Reviewed-by: Shyam Prasad N <sprasad@microsoft.com>
Acked-by: Paulo Alcantara (Red Hat) <pc@manguebit.com>
Signed-off-by: Steve French <stfrench@microsoft.com>
- Fix corner case bug where ops.dispatch() couldn't extend the execution of
the current task if SCX_OPS_ENQ_LAST is set.
- Fix ops.cpu_release() not being called when a SCX task is preempted by a
higher priority sched class task.
- Fix buitin idle mask being incorrectly left as busy after an idle CPU is
picked and kicked.
- scx_ops_bypass() was unnecessarily using rq_lock() which comes with rq
pinning related sanity checks which could trigger spuriously. Switch to
raw_spin_rq_lock().
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Merge tag 'sched_ext-for-6.13-rc6-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/sched_ext
Pull sched_ext fixes from Tejun Heo:
- Fix corner case bug where ops.dispatch() couldn't extend the
execution of the current task if SCX_OPS_ENQ_LAST is set.
- Fix ops.cpu_release() not being called when a SCX task is preempted
by a higher priority sched class task.
- Fix buitin idle mask being incorrectly left as busy after an idle CPU
is picked and kicked.
- scx_ops_bypass() was unnecessarily using rq_lock() which comes with
rq pinning related sanity checks which could trigger spuriously.
Switch to raw_spin_rq_lock().
* tag 'sched_ext-for-6.13-rc6-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/sched_ext:
sched_ext: idle: Refresh idle masks during idle-to-idle transitions
sched_ext: switch class when preempted by higher priority scheduler
sched_ext: Replace rq_lock() to raw_spin_rq_lock() in scx_ops_bypass()
sched_ext: keep running prev when prev->scx.slice != 0
All are cpuset changes:
- Fix isolated CPUs leaking into sched domains.
- Remove now unnecessary kernfs active break which can trigger a warning.
- Comment updates.
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Merge tag 'cgroup-for-6.13-rc6-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/cgroup
Pull cgroup fixes from Tejun Heo:
"Cpuset fixes:
- Fix isolated CPUs leaking into sched domains
- Remove now unnecessary kernfs active break which can trigger a
warning
- Comment updates"
* tag 'cgroup-for-6.13-rc6-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/cgroup:
cgroup/cpuset: remove kernfs active break
cgroup/cpuset: Prevent leakage of isolated CPUs into sched domains
cgroup/cpuset: Remove stale text
- Add a WARN_ON_ONCE() on queue_delayed_work_on() on an offline CPU as such
work items won't get executed till the CPU comes back online.
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Merge tag 'wq-for-6.13-rc6-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/wq
Pull workqueue fix from Tejun Heo:
- Add a WARN_ON_ONCE() on queue_delayed_work_on() on an offline CPU as
such work items won't get executed till the CPU comes back online
* tag 'wq-for-6.13-rc6-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/wq:
workqueue: warn if delayed_work is queued to an offlined cpu.
