dummycon fails to build on ARM/footbridge when the VGA console is
disabled, since I got the dependencies slightly wrong in a previous
patch:
drivers/video/console/dummycon.c: In function 'dummycon_init':
drivers/video/console/dummycon.c:27:25: error: 'CONFIG_DUMMY_CONSOLE_COLUMNS' undeclared (first use in this function); did you mean 'CONFIG_DUMMY_CONSOLE'?
27 | #define DUMMY_COLUMNS CONFIG_DUMMY_CONSOLE_COLUMNS
drivers/video/console/dummycon.c:28:25: error: 'CONFIG_DUMMY_CONSOLE_ROWS' undeclared (first use in this function); did you mean 'CONFIG_DUMMY_CONSOLE'?
28 | #define DUMMY_ROWS CONFIG_DUMMY_CONSOLE_ROWS
This only showed up after many thousand randconfig builds on Arm, and
doesn't matter in practice, but should still be fixed. Address it by
using the default row/columns on footbridge after all in that corner
case.
Fixes: 4293b09251 ("dummycon: limit Arm console size hack to footbridge")
Reported-by: kernel test robot <lkp@intel.com>
Closes: https://lore.kernel.org/oe-kbuild-all/202409151512.LML1slol-lkp@intel.com/
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Reviewed-by: Thomas Zimmermann <tzimmermann@suse.de>
Signed-off-by: Helge Deller <deller@gmx.de>
Dummycon is used as a fallback conswitchp for vgacon and fbcon
in the VT code, and there are no references to it if all three
are disabled, so just leave it out of the kernel image for
configurations without those.
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Reviewed-by: Thomas Zimmermann <tzimmermann@suse.de>
Signed-off-by: Helge Deller <deller@gmx.de>
The address of a data structure member was determined before
a corresponding null pointer check in the implementation of
the function “au1100fb_setmode”.
This issue was detected by using the Coccinelle software.
Fixes: 3b495f2bb7 ("Au1100 FB driver uplift for 2.6.")
Signed-off-by: Markus Elfring <elfring@users.sourceforge.net>
Acked-by: Uwe Kleine-König <u.kleine-koenig@baylibre.com>
Signed-off-by: Helge Deller <deller@gmx.de>
Convert to use devm_kmemdup() and devm_kmemdup_array() which are
more robust.
Signed-off-by: Raag Jadav <raag.jadav@intel.com>
Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Helge Deller <deller@gmx.de>
The erase colour calculation for fbcon clearing should use get_color instead
of attr_col_ec, like everything else. The latter is similar but is not correct.
For example it's missing the depth dependent remapping and doesn't care about
blanking.
The problem can be reproduced by setting up the background colour to grey
(vt.color=0x70) and having an fbcon console set to 2bpp (4 shades of gray).
Now the background attribute should be 1 (dark gray) on the console.
If the screen is scrolled when pressing enter in a shell prompt at the bottom
line then the new line is cleared using colour 7 instead of 1. That's not
something fillrect likes (at 2bbp it expect 0-3) so the result is interesting.
This patch switches to get_color with vc_video_erase_char to determine the
erase colour from attr_col_ec. That makes the latter function redundant as
no other users were left.
Use correct erase colour for clearing in fbcon
Signed-off-by: Zsolt Kajtar <soci@c64.rulez.org>
Signed-off-by: Helge Deller <deller@gmx.de>
I was wondering why there's garbage at the bottom of the screen when
tile blitting is used with an odd mode like 1080, 600 or 200. Sure there's
only space for half a tile but the same area is clean when the buffer
is bitmap.
Then later I found that it's supposed to be cleaned but that's not
implemented. So I took what's in bitblit and adapted it for tileblit.
This implementation was tested for both the horizontal and vertical case,
and now does the same as what's done for bitmap buffers.
If anyone is interested to reproduce the problem then I could bet that'd
be on a S3 or Ark. Just set up a mode with an odd line count and make
sure that the virtual size covers the complete tile at the bottom. E.g.
for 600 lines that's 608 virtual lines for a 16 tall tile. Then the
bottom area should be cleaned.
For the right side it's more difficult as there the drivers won't let an
odd size happen, unless the code is modified. But once it reports back a
few pixel columns short then fbcon won't use the last column. With the
patch that column is now clean.
Btw. the virtual size should be rounded up by the driver for both axes
(not only the horizontal) so that it's dividable by the tile size.
That's a driver bug but correcting it is not in scope for this patch.
Implement missing margin clearing for tileblit
Signed-off-by: Zsolt Kajtar <soci@c64.rulez.org>
Signed-off-by: Helge Deller <deller@gmx.de>
When arm64 is built with LTO, it upgrades READ_ONCE() to ldar / ldapr
(load-acquire) to avoid issues that can be caused by the compiler
optimizing away implicit address dependencies.
Unlike plain loads, these load-acquire instructions actually require an
aligned address.
For now, fix it by removing the READ_ONCE() that the buggy commit
introduced.
Fixes: ece69af2ed ("rwonce: handle KCSAN like KASAN in read_word_at_a_time()")
Reported-by: Nathan Chancellor <nathan@kernel.org>
Closes: https://lore.kernel.org/r/20250326203926.GA10484@ax162
Signed-off-by: Jann Horn <jannh@google.com>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
We need to save the reservation object pointer associated with the
imported dmabuf in the newly created GEM object to allow
drm_gem_plane_helper_prepare_fb() to extract the exclusive fence
from it and attach it to the plane state during prepare phase.
This is needed to ensure that drm_atomic_helper_wait_for_fences()
correctly waits for the relevant fences (move, etc) associated with
the reservation object, thereby implementing proper synchronization.
Otherwise, artifacts or slight flickering can be seen when apps
are dragged across the screen when running Gnome (Wayland). This
problem is mostly seen with dGPUs in the case where the FBs are
allocated in VRAM but need to be migrated to System RAM as they
are shared with virtio-gpu.
Fixes: ca77f27a26 ("drm/virtio: Import prime buffers from other devices as guest blobs")
Cc: Gerd Hoffmann <kraxel@redhat.com>
Cc: Dmitry Osipenko <dmitry.osipenko@collabora.com>
Cc: Gurchetan Singh <gurchetansingh@chromium.org>
Cc: Chia-I Wu <olvaffe@gmail.com>
Signed-off-by: Vivek Kasireddy <vivek.kasireddy@intel.com>
Reviewed-by: Dmitry Osipenko <dmitry.osipenko@collabora.com>
Signed-off-by: Dmitry Osipenko <dmitry.osipenko@collabora.com>
[dmitry.osipenko@collabora.com: Moved assignment before object_init()]
Link: https://patchwork.freedesktop.org/patch/msgid/20250325201021.1315080-1-vivek.kasireddy@intel.com
A BPF scheduler may want to use the built-in idle cpumasks in ops.init()
before the scheduler is fully initialized, either directly or through a
BPF timer for example.
However, this would result in an error, since the idle state has not
been properly initialized yet.
This can be easily verified by modifying scx_simple to call
scx_bpf_get_idle_cpumask() in ops.init():
$ sudo scx_simple
DEBUG DUMP
===========================================================================
scx_simple[121] triggered exit kind 1024:
runtime error (built-in idle tracking is disabled)
...
Fix this by properly initializing the idle state before ops.init() is
called. With this change applied:
$ sudo scx_simple
local=2 global=0
local=19 global=11
local=23 global=11
...
Fixes: d73249f887 ("sched_ext: idle: Make idle static keys private")
Signed-off-by: Andrea Righi <arighi@nvidia.com>
Reviewed-by: Joel Fernandes <joelagnelf@nvidia.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
create_dsq and therefore the scx_bpf_create_dsq kfunc currently silently
ignore duplicate entries. As a sched_ext scheduler is creating each DSQ
for a different purpose this is surprising behaviour.
Replace rhashtable_insert_fast which ignores duplicates with
rhashtable_lookup_insert_fast that reports duplicates (though doesn't
return their value). The rest of the code is structured correctly and
this now returns -EEXIST.
Tested by adding an extra scx_bpf_create_dsq to scx_simple. Previously
this was ignored, now init fails with a -17 code. Also ran scx_lavd
which continued to work well.
Signed-off-by: Jake Hillion <jake@hillion.co.uk>
Acked-by: Andrea Righi <arighi@nvidia.com>
Fixes: f0e1a0643a ("sched_ext: Implement BPF extensible scheduler class")
Cc: stable@vger.kernel.org # v6.12+
Signed-off-by: Tejun Heo <tj@kernel.org>
- Add support for suspend/resume in the STM32 LP-Timer driver with a
follow up fix, which uses the proper method to setup the timer as a
optional wakeup source instead of trying to force it as mandatory
wakeup source.
- The usual device tree updates to enable new SoC models in existing
drivers.
- Trivial spelling, style and indentation fixes
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Merge tag 'timers-clocksource-2025-03-26' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull clocksource/event updates from Thomas Gleixner:
- Add support for suspend/resume in the STM32 LP-Timer driver with a
follow up fix, which uses the proper method to setup the timer as a
optional wakeup source instead of trying to force it as mandatory
wakeup source.
- The usual device tree updates to enable new SoC models in existing
drivers.
- Trivial spelling, style and indentation fixes
* tag 'timers-clocksource-2025-03-26' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
dt-bindings: timer: Add SiFive CLINT2
clocksource/drivers/stm32-lptimer: Use wakeup capable instead of init wakeup
clocksource/drivers/exynos_mct: Fixed a spelling error
clocksource/drivers/stm32-lptimer: Add support for suspend / resume
dt-bindings: timer: exynos4210-mct: add samsung,exynos2200-mct-peris compatible
dt-bindings: timer: exynos4210-mct: Add samsung,exynos990-mct compatible
dt-bindings: timer: Correct indentation and style in DTS example
Fixes "task out to lunch" warnings during recovery on large machines
with lots of dirty data in the journal.
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
btree node scan has to wait on kthread workers that scan each device,
potentially for awhile.
We would like this to be interruptible, but we may need a different
mechanism than signals for that - we've had bugs in the past where
mounts were failing due to checking for signals, and no explanation on
where they came from.
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
Data move -> move_get_io_opts -> bch2_get_update_rebalance_opts
requires a not_extents iterator; this fixes the path where we're walking
the extents btree and chase a reflink pointer into the reflink btree.
bch2_lookup_indirect_extent() requires working with an extents iterator
(due to peek_slot() semantics), so we implement
bch2_lookup_indirect_extent_for_move().
This is simplified because there's no need to report
indirect_extent_missing_errors here, that can be deferred until fsck or
when a user reads that data.
Reported-by: Maël Kerbiriou <mael.kerbiriou@free.fr>
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
There's various checks for "are we going to compress this" - but we're
not going to compress if we know it's incompressible.
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
We weren't checking that accounting keys have the expected number of
accounters. Originally we probably wanted to be flexible on this, but it
doesn't look like that will be required - accounting is extended by
adding new counter types, not more counters to an existing type.
This means we can drop a BUG_ON() that popped once in automated testing,
and the new validation will make that bug easier to track down.
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
XEN used a global variable to disable the masking of MSI interrupts as
XEN handles that on the hypervisor side. This turned out to be a problem
with VMD as the PCI devices behind a VMD bridge are not always handled
by the hypervisor and then require masking by guest.
To solve this the global variable was replaced by a interrupt domain
specific flag, which is set by the generic XEN PCI/MSI domain, but not by
VMD or any other domain in the system.
So far, so good. But the implementation (and the reviewer) missed the
fact, that accessing the domain flag cannot be done directly because
there are at least two situations, where this fails. Legacy architectures
are not providing interrupt domains at all. The new MSI parent domains do
not require to have a domain info pointer. Both cases result in a
unconditional NULL pointer derefence.
The PCI/MSI code already has a function to query the MSI domain specific
flag in a safe way, which handles all possible cases of PCI/MSI backends.
So the fix it simply to replace the open coded checks by invoking the
safe helper to query the flag.
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Merge tag 'irq-urgent-2025-03-26' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull MSI irq fix from Thomas Gleixner:
"An urgent fix for the XEN related PCI/MSI changes:
XEN used a global variable to disable the masking of MSI interrupts as
XEN handles that on the hypervisor side. This turned out to be a
problem with VMD as the PCI devices behind a VMD bridge are not always
handled by the hypervisor and then require masking by guest.
To solve this the global variable was replaced by a interrupt domain
specific flag, which is set by the generic XEN PCI/MSI domain, but not
by VMD or any other domain in the system.
So far, so good. But the implementation (and the reviewer) missed the
fact, that accessing the domain flag cannot be done directly because
there are at least two situations, where this fails.
Legacy architectures are not providing interrupt domains at all. The
new MSI parent domains do not require to have a domain info pointer.
Both cases result in a unconditional NULL pointer derefence.
The PCI/MSI code already has a function to query the MSI domain
specific flag in a safe way, which handles all possible cases of
PCI/MSI backends.
So the fix it simply to replace the open coded checks by invoking the
safe helper to query the flag"
* tag 'irq-urgent-2025-03-26' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
PCI/MSI: Handle the NOMASK flag correctly for all PCI/MSI backends
One additional BMG PCI ID has been added to the spec; make sure our
driver recognizes devices with this ID properly.
Bspec: 68090
Cc: stable@vger.kernel.org # v6.12+
Reviewed-by: Clint Taylor <Clinton.A.Taylor@intel.com>
Reviewed-by: Lucas De Marchi <lucas.demarchi@intel.com>
Link: https://lore.kernel.org/r/20250325224709.4073080-2-matthew.d.roper@intel.com
Signed-off-by: Matt Roper <matthew.d.roper@intel.com>
scx_select_cpu_dfl() has a meaningless conditional goto at the end. Remove
it. No functional changes.
Signed-off-by: Tejun Heo <tj@kernel.org>
Cc: Andrea Righi <arighi@nvidia.com>
Return -EBUSY when using %SCX_PICK_IDLE_CORE with scx_select_cpu_dfl()
if a fully idle SMT core cannot be found, instead of falling back to
@prev_cpu, which is not a fully idle SMT core in this case.
Fixes: c414c2171c ("sched_ext: idle: Honor idle flags in the built-in idle selection policy")
Signed-off-by: Andrea Righi <arighi@nvidia.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
Use refcount_t helper for vmap_use_count to make refcounting consistent
with pages_use_count and pages_pin_count that use refcount_t. This also
makes vmapping to benefit from the refcount_t's overflow checks.
Acked-by: Maxime Ripard <mripard@kernel.org>
Reviewed-by: Boris Brezillon <boris.brezillon@collabora.com>
Suggested-by: Boris Brezillon <boris.brezillon@collabora.com>
Acked-by: Thomas Zimmermann <tzimmermann@suse.d>
Signed-off-by: Dmitry Osipenko <dmitry.osipenko@collabora.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20250322212608.40511-11-dmitry.osipenko@collabora.com
The vmapped pages shall be pinned in memory and previously get/put_pages()
were implicitly hard-pinning/unpinning the pages. This will no longer be
the case with addition of memory shrinker because pages_use_count > 0 won't
determine anymore whether pages are hard-pinned (they will be soft-pinned),
while the new pages_pin_count will do the hard-pinning. Switch the
vmap/vunmap() to use pin/unpin() functions in a preparation of addition
of the memory shrinker support to drm-shmem.
Acked-by: Maxime Ripard <mripard@kernel.org>
Reviewed-by: Boris Brezillon <boris.brezillon@collabora.com>
Acked-by: Thomas Zimmermann <tzimmermann@suse.d>
Signed-off-by: Dmitry Osipenko <dmitry.osipenko@collabora.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20250322212608.40511-10-dmitry.osipenko@collabora.com
Use atomic refcount_t helper for pages_use_count to optimize pin/unpin
functions by skipping reservation locking while GEM's pin refcount > 1.
Acked-by: Maxime Ripard <mripard@kernel.org>
Reviewed-by: Boris Brezillon <boris.brezillon@collabora.com>
Suggested-by: Boris Brezillon <boris.brezillon@collabora.com>
Acked-by: Thomas Zimmermann <tzimmermann@suse.d>
Signed-off-by: Dmitry Osipenko <dmitry.osipenko@collabora.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20250322212608.40511-9-dmitry.osipenko@collabora.com
Add separate pages_pin_count for tracking of whether drm-shmem pages are
moveable or not. With the addition of memory shrinker support to drm-shmem,
the pages_use_count will no longer determine whether pages are hard-pinned
in memory, but whether pages exist and are soft-pinned (and could be swapped
out). The pages_pin_count > 1 will hard-pin pages in memory.
Acked-by: Maxime Ripard <mripard@kernel.org>
Reviewed-by: Boris Brezillon <boris.brezillon@collabora.com>
Suggested-by: Boris Brezillon <boris.brezillon@collabora.com>
Acked-by: Thomas Zimmermann <tzimmermann@suse.d>
Signed-off-by: Dmitry Osipenko <dmitry.osipenko@collabora.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20250322212608.40511-8-dmitry.osipenko@collabora.com
Everything that uses the mapped buffer should be agnostic to is_iomem.
The only reason for the is_iomem test is that we're setting shmem->vaddr
to the returned map->vaddr. Now that the shmem->vaddr code is gone, remove
the obsoleted is_iomem test to clean up the code.
Acked-by: Maxime Ripard <mripard@kernel.org>
Suggested-by: Thomas Zimmermann <tzimmermann@suse.de>
Reviewed-by: Boris Brezillon <boris.brezillon@collabora.com>
Acked-by: Thomas Zimmermann <tzimmermann@suse.d>
Signed-off-by: Dmitry Osipenko <dmitry.osipenko@collabora.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20250322212608.40511-7-dmitry.osipenko@collabora.com
Add locked and remove unlocked postfixes from drm-shmem function names,
making names consistent with the drm/gem core code.
Reviewed-by: Boris Brezillon <boris.brezillon@collabora.com>
Suggested-by: Boris Brezillon <boris.brezillon@collabora.com>
Acked-by: Thomas Zimmermann <tzimmermann@suse.d>
Signed-off-by: Dmitry Osipenko <dmitry.osipenko@collabora.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20250322212608.40511-6-dmitry.osipenko@collabora.com
Make all drm-shmem exported symbols GPL to make them consistent with
the rest of drm-shmem symbols.
Acked-by: Maxime Ripard <mripard@kernel.org>
Reviewed-by: Boris Brezillon <boris.brezillon@collabora.com>
Acked-by: Thomas Zimmermann <tzimmermann@suse.d>
Signed-off-by: Dmitry Osipenko <dmitry.osipenko@collabora.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20250322212608.40511-5-dmitry.osipenko@collabora.com
The vmap/vunmap/evict GEM callbacks are always invoked with a held GEM's
reservation lock. Document this locking rule for clarity.
Reviewed-by: Boris Brezillon <boris.brezillon@collabora.com>
Reviewed-by: Christian König <christian.koenig@amd.com>
Acked-by: Thomas Zimmermann <tzimmermann@suse.d>
Signed-off-by: Dmitry Osipenko <dmitry.osipenko@collabora.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20250322212608.40511-4-dmitry.osipenko@collabora.com
Add _locked postfix to drm_gem functions that have unlocked counterpart
functions to make GEM functions naming more consistent and intuitive in
regards to the locking requirements.
Acked-by: Maxime Ripard <mripard@kernel.org>
Reviewed-by: Boris Brezillon <boris.brezillon@collabora.com>
Suggested-by: Boris Brezillon <boris.brezillon@collabora.com>
Reviewed-by: Christian König <christian.koenig@amd.com>
Acked-by: Thomas Zimmermann <tzimmermann@suse.d>
Signed-off-by: Dmitry Osipenko <dmitry.osipenko@collabora.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20250322212608.40511-3-dmitry.osipenko@collabora.com
Make drm/gem API function names consistent by having locked function
use the _locked postfix in the name, while the unlocked variants don't
use the _unlocked postfix. Rename drm_gem_v/unmap() function names to
make them consistent with the rest of the API functions.
Acked-by: Maxime Ripard <mripard@kernel.org>
Reviewed-by: Boris Brezillon <boris.brezillon@collabora.com>
Suggested-by: Boris Brezillon <boris.brezillon@collabora.com>
Reviewed-by: Christian König <christian.koenig@amd.com>
Acked-by: Thomas Zimmermann <tzimmermann@suse.d>
Signed-off-by: Dmitry Osipenko <dmitry.osipenko@collabora.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20250322212608.40511-2-dmitry.osipenko@collabora.com
SMB1 protocol supports non-UNICODE (8-bit OEM character set) and
UNICODE (UTF-16) modes.
Linux SMB1 client implements both of them but currently does not allow to
choose non-UNICODE mode when SMB1 server announce UNICODE mode support.
This change adds a new mount option -o nounicode to disable UNICODE mode
and force usage of non-UNICODE (8-bit OEM character set) mode.
This allows to test non-UNICODE implementation of Linux SMB1 client against
any SMB1 server, including modern and recent Windows SMB1 server.
Signed-off-by: Pali Rohár <pali@kernel.org>
Signed-off-by: Steve French <stfrench@microsoft.com>
Windows SMB servers (including SMB2+) which are working over RFC1001
require that Netbios server name specified in RFC1001 Session Request
packet is same as the UNC host name. Netbios server name can be already
specified manually via -o servern= option.
With this change the RFC1001 server name is set automatically by extracting
the hostname from the mount source.
Signed-off-by: Pali Rohár <pali@kernel.org>
Signed-off-by: Steve French <stfrench@microsoft.com>
Commit ef7134c7fc ("smb: client: Fix use-after-free of network
namespace.") attempted to fix a netns use-after-free issue by manually
adjusting reference counts via sk->sk_net_refcnt and sock_inuse_add().
However, a later commit e9f2517a3e ("smb: client: fix TCP timers deadlock
after rmmod") pointed out that the approach of manually setting
sk->sk_net_refcnt in the first commit was technically incorrect, as
sk->sk_net_refcnt should only be set for user sockets. It led to issues
like TCP timers not being cleared properly on close. The second commit
moved to a model of just holding an extra netns reference for
server->ssocket using get_net(), and dropping it when the server is torn
down.
But there remain some gaps in the get_net()/put_net() balancing added by
these commits. The incomplete reference handling in these fixes results
in two issues:
1. Netns refcount leaks[1]
The problem process is as follows:
```
mount.cifs cifsd
cifs_do_mount
cifs_mount
cifs_mount_get_session
cifs_get_tcp_session
get_net() /* First get net. */
ip_connect
generic_ip_connect /* Try port 445 */
get_net()
->connect() /* Failed */
put_net()
generic_ip_connect /* Try port 139 */
get_net() /* Missing matching put_net() for this get_net().*/
cifs_get_smb_ses
cifs_negotiate_protocol
smb2_negotiate
SMB2_negotiate
cifs_send_recv
wait_for_response
cifs_demultiplex_thread
cifs_read_from_socket
cifs_readv_from_socket
cifs_reconnect
cifs_abort_connection
sock_release();
server->ssocket = NULL;
/* Missing put_net() here. */
generic_ip_connect
get_net()
->connect() /* Failed */
put_net()
sock_release();
server->ssocket = NULL;
free_rsp_buf
...
clean_demultiplex_info
/* It's only called once here. */
put_net()
```
When cifs_reconnect() is triggered, the server->ssocket is released
without a corresponding put_net() for the reference acquired in
generic_ip_connect() before. it ends up calling generic_ip_connect()
again to retry get_net(). After that, server->ssocket is set to NULL
in the error path of generic_ip_connect(), and the net count cannot be
released in the final clean_demultiplex_info() function.
2. Potential use-after-free
The current refcounting scheme can lead to a potential use-after-free issue
in the following scenario:
```
cifs_do_mount
cifs_mount
cifs_mount_get_session
cifs_get_tcp_session
get_net() /* First get net */
ip_connect
generic_ip_connect
get_net()
bind_socket
kernel_bind /* failed */
put_net()
/* after out_err_crypto_release label */
put_net()
/* after out_err label */
put_net()
```
In the exception handling process where binding the socket fails, the
get_net() and put_net() calls are unbalanced, which may cause the
server->net reference count to drop to zero and be prematurely released.
To address both issues, this patch ties the netns reference counting to
the server->ssocket and server lifecycles. The extra reference is now
acquired when the server or socket is created, and released when the
socket is destroyed or the server is torn down.
[1]: https://bugzilla.kernel.org/show_bug.cgi?id=219792
Fixes: ef7134c7fc ("smb: client: Fix use-after-free of network namespace.")
Fixes: e9f2517a3e ("smb: client: fix TCP timers deadlock after rmmod")
Signed-off-by: Wang Zhaolong <wangzhaolong1@huawei.com>
Signed-off-by: Steve French <stfrench@microsoft.com>
cifs.ko is missing validation check when accessing smb_aces.
This patch add validation check for the fields in smb_aces.
Signed-off-by: Namjae Jeon <linkinjeon@kernel.org>
Signed-off-by: Steve French <stfrench@microsoft.com>
In a multichannel setup, it was observed that a few fields were not being
copied over to the secondary channels, which impacted performance in cases
where these options were relevant but not properly synchronized. To address
this, this patch introduces copying the following parameters from the
primary channel to the secondary channels:
- min_offload
- compression.requested
- dfs_conn
- ignore_signature
- leaf_fullpath
- noblockcnt
- retrans
- sign
By copying these parameters, we ensure consistency across channels and
prevent performance degradation due to missing or outdated settings.
Cc: stable@vger.kernel.org
Signed-off-by: Aman <aman1@microsoft.com>
Reviewed-by: Paulo Alcantara (Red Hat) <pc@manguebit.com>
Signed-off-by: Steve French <stfrench@microsoft.com>
Function ip_rfc1001_connect() send NetBIOS session request but currently
does not read response. It even does not wait for the response. Instead it
just calls usleep_range(1000, 2000) and explain in comment that some
servers require short break before sending SMB negotiate packet. Response
is later handled in generic is_smb_response() function called from
cifs_demultiplex_thread().
That comment probably refers to the old DOS SMB server which cannot process
incoming SMB negotiate packet if it has not sent NetBIOS session response
packet. Note that current sleep timeout is too small when trying to
establish connection to DOS SMB server running in qemu virtual machine
connected over qemu user networking with guestfwd netcat options. So that
usleep_range() call is not useful at all.
NetBIOS session response packet contains useful error information, like
the server name specified NetBIOS session request packet is incorrect.
Old Windows SMB servers and even the latest SMB server on the latest
Windows Server 2022 version requires that the name is the correct server
name, otherwise they return error RFC1002_NOT_PRESENT. This applies for all
SMB dialects (old SMB1, and also modern SMB2 and SMB3).
Therefore read the reply of NetBIOS session request and implement parsing
of the reply. Log received error to dmesg to help debugging reason why
connection was refused. Also convert NetBIOS error to useful errno.
Note that ip_rfc1001_connect() function is used only when doing connection
over port 139. So the common SMB scenario over port 445 is not affected by
this change at all.
Signed-off-by: Pali Rohár <pali@kernel.org>
Signed-off-by: Steve French <stfrench@microsoft.com>
Function ip_rfc1001_connect() which establish NetBIOS session for SMB
connections, currently uses smb_send() function for sending NetBIOS Session
Request packet. This function expects that the passed buffer is SMB packet
and for SMB2+ connections it mangles packet header, which breaks prepared
NetBIOS Session Request packet. Result is that this function send garbage
packet for SMB2+ connection, which SMB2+ server cannot parse. That function
is not mangling packets for SMB1 connections, so it somehow works for SMB1.
Fix this problem and instead of smb_send(), use smb_send_kvec() function
which does not mangle prepared packet, this function send them as is. Just
API of this function takes struct msghdr (kvec) instead of packet buffer.
[MS-SMB2] specification allows SMB2 protocol to use NetBIOS as a transport
protocol. NetBIOS can be used over TCP via port 139. So this is a valid
configuration, just not so common. And even recent Windows versions (e.g.
Windows Server 2022) still supports this configuration: SMB over TCP port
139, including for modern SMB2 and SMB3 dialects.
This change fixes SMB2 and SMB3 connections over TCP port 139 which
requires establishing of NetBIOS session. Tested that this change fixes
establishing of SMB2 and SMB3 connections with Windows Server 2022.
Signed-off-by: Pali Rohár <pali@kernel.org>
Signed-off-by: Steve French <stfrench@microsoft.com>
Currently ->get_acl() callback always create request for OWNER, GROUP and
DACL, even when only DACLs was requested by user. Change API callback to
request only information for which the caller asked. Therefore when only
DACLs requested, then SMB client will prepare and send DACL-only request.
This change fixes retrieving of "system.cifs_acl" and "system.smb3_acl"
xattrs to contain only DACL structure as documented.
Note that setting/changing of "system.cifs_acl" and "system.smb3_acl"
xattrs already takes only DACL structure and ignores all other fields.
Signed-off-by: Pali Rohár <pali@kernel.org>
Signed-off-by: Steve French <stfrench@microsoft.com>
Do not attempt to query or create reparse point when server fs does not
support it. This will prevent creating unusable empty object on the server.
Signed-off-by: Pali Rohár <pali@kernel.org>
Signed-off-by: Steve French <stfrench@microsoft.com>
The maintainer script displays the first email if two provided,
so reorder my email to put the preferred first.
Signed-off-by: Steve French <stfrench@microsoft.com>
* clk-allwinner:
clk: sunxi-ng: add support for the A523/T527 PRCM CCU
clk: sunxi-ng: a523: add reset lines
clk: sunxi-ng: a523: add bus clock gates
clk: sunxi-ng: a523: remaining mod clocks
clk: sunxi-ng: a523: add USB mod clocks
clk: sunxi-ng: a523: add interface mod clocks
clk: sunxi-ng: a523: add system mod clocks
clk: sunxi-ng: a523: add video mod clocks
clk: sunxi-ng: a523: Add support for bus clocks
clk: sunxi-ng: Add support for the A523/T527 CCU PLLs
dt-bindings: clk: sunxi-ng: document two Allwinner A523 CCUs
clk: sunxi-ng: Add support for update bit
clk: sunxi-ng: mp: provide wrappers for setting feature flags
clk: sunxi-ng: mp: introduce dual-divider clock
clk: sunxi-ng: h616: Reparent GPU clock during frequency changes
clk: sunxi-ng: h616: Add clock/reset for LCD TCON
dt-bindings: clock: sun50i-h616-ccu: Add LCD TCON clk and reset
* clk-amlogic:
clk: amlogic: a1: fix a typo
clk: amlogic: gxbb: drop non existing 32k clock parent
clk: amlogic: gxbb: drop incorrect flag on 32k clock
clk: amlogic: g12b: fix cluster A parent data
clk: amlogic: g12a: fix mmc A peripheral clock
* clk-qcom: (41 commits)
clk: qcom: Add NSS clock Controller driver for IPQ9574
clk: qcom: gcc-ipq9574: Add support for gpll0_out_aux clock
dt-bindings: clock: Add ipq9574 NSSCC clock and reset definitions
dt-bindings: clock: gcc-ipq9574: Add definition for GPLL0_OUT_AUX
clk: qcom: gcc-msm8953: fix stuck venus0_core0 clock
clk: qcom: mmcc-sdm660: fix stuck video_subcore0 clock
dt-bindings: clock: qcom,x1e80100-camcc: Fix the list of required-opps
drivers: clk: qcom: ipq5424: fix the freq table of sdcc1_apps clock
clk: qcom: lpassaudiocc-sc7280: Add support for LPASS resets for QCM6490
dt-bindings: clock: qcom: Add compatible for QCM6490 boards
clk: qcom: gdsc: Update the status poll timeout for GDSC
clk: qcom: gdsc: Set retain_ff before moving to HW CTRL
clk: qcom: gcc-sm8650: Do not turn off USB GDSCs during gdsc_disable()
clk: qcom: videocc: Constify 'struct qcom_cc_desc'
clk: qcom: gpucc: Constify 'struct qcom_cc_desc'
clk: qcom: dispcc: Constify 'struct qcom_cc_desc'
clk: qcom: camcc: Constify 'struct qcom_cc_desc'
dt-bindings: clock: qcom: sm8450-camcc: Remove qcom,x1e80100-camcc leftover
clk: qcom: Add support for Video Clock Controller on QCS8300
clk: qcom: Add support for GPU Clock Controller on QCS8300
...
The atmel,dataflash binding has been converted to yaml and the physmap
one constrained. Some logs are improved, error path are getting reworked
a bit, few patches target the use of str_enabled_disabled().
* Raw NAND changes:
i.MX8 and i.MX31 now have their own compatible, the Qcom driver got
cleaned, the Broadcom driver got fixed.
* SPI NAND changes:
Two main features have been added:
- OTP support has been brought, and ESMT and Micron manufacturer drivers
implement it.
- Read retry, and Macronix manufacturer driver implement it.
* SPI NOR changes:
Adding support for few flashes. Few cleanup patches for the core
driver, where we touched the headers inclusion list and we start using
the scope based mutex cleanup helpers.
There is as well a bunch of minor improvements and fixes in drivers and
bindings.
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Merge tag 'mtd/for-6.15' of git://git.kernel.org/pub/scm/linux/kernel/git/mtd/linux
Pull mtd updates from Miquel Raynal:
"MTD changes:
- The atmel,dataflash binding has been converted to yaml and the
physmap one constrained. Some logs are improved, error path are
getting reworked a bit, few patches target the use of
str_enabled_disabled().
Raw NAND changes:
- i.MX8 and i.MX31 now have their own compatible, the Qcom driver got
cleaned, the Broadcom driver got fixed.
SPI NAND changes:
- OTP support has been brought, and ESMT and Micron manufacturer
drivers implement it.
- Read retry, and Macronix manufacturer driver implement it.
SPI NOR changes:
- Adding support for few flashes. Few cleanup patches for the core
driver, where we touched the headers inclusion list and we start
using the scope based mutex cleanup helpers.
There is also a bunch of minor improvements and fixes in drivers
and bindings"
* tag 'mtd/for-6.15' of git://git.kernel.org/pub/scm/linux/kernel/git/mtd/linux: (34 commits)
dt-bindings: mtd: atmel,dataflash: convert txt to yaml
mtd: mchp48l640: Use str_enable_disable() in mchp48l640_write_prepare()
mtd: rawnand: gpmi: Use str_enabled_disabled() in gpmi_nand_attach_chip()
mtd: mtdpart: Do not supply NULL to printf()
dt-bindings: mtd: gpmi-nand: Add compatible string for i.MX8 chips
mtd: nand: Fix a kdoc comment
mtd: spinand: Improve spinand_info macros style
mtd: spi-nor: drop unused <linux/of_platform.h>
mtd: spi-nor: explicitly include <linux/of.h>
mtd: spi-nor: explicitly include <linux/math64.h>
mtd: spi-nor: macronix: add support for mx66{l2, u1}g45g
mtd: spi-nor: macronix: Add post_sfdp fixups for Quad Input Page Program
mtd: Fix error handling in mtd_device_parse_register() error path
mtd: capture device name setting failure when adding mtd
mtd: Add check for devm_kcalloc()
mtd: Replace kcalloc() with devm_kcalloc()
dt-bindings: mtd: physmap: Ensure all properties are defined
mtd: rawnand: brcmnand: fix PM resume warning
dt-bindings: mtd: mxc-nand: Document fsl,imx31-nand
mtd: spinand: macronix: Add support for read retry
...
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Merge tag 'hid-for-linus-2025032601' of git://git.kernel.org/pub/scm/linux/kernel/git/hid/hid
Pull HID updates from Jiri Kosina:
- PlayStation 5 controllers support (Alex Henrie)
- big revamp and modernization of the aged hid-pidff force feedback
driver (Tomasz Pakuła)
- conversion of hid-lg-g15 to standard multicolor LED API (Kate Hsuan)
- improvement of behavior of Human Presence Sensor (HPD) in amd_sfh
driver (Mario Limonciello)
- other assorted fixes, code cleanups and device ID additions
* tag 'hid-for-linus-2025032601' of git://git.kernel.org/pub/scm/linux/kernel/git/hid/hid: (70 commits)
HID: remove superfluous (and wrong) Makefile entry for CONFIG_INTEL_ISH_FIRMWARE_DOWNLOADER
HID: Intel-thc-hid: Intel-quickspi: Correct device state names gramatically
HID: wacom: Remove static WACOM_PKGLEN_MAX limit
HID: amd_sfh: Don't show wrong status for amd_sfh_hpd_info()
HID: amd_sfh: Default to HPD disabled
HID: amd_sfh: Allow configuring whether HPD is enabled or disabled
HID: pidff: Fix set_device_control()
HID: pidff: Fix 90 degrees direction name North -> East
HID: pidff: Compute INFINITE value instead of using hardcoded 0xffff
HID: pidff: Clamp effect playback LOOP_COUNT value
HID: pidff: Rename two functions to align them with naming convention
HID: lenovo: silence unreachable code warning
HID: lenovo: Fix to ensure the data as __le32 instead of u32
HID: bpf: add a v6.11+ compatible BPF fixup for the XPPen ACK05 remote
HID: bpf: new hid_bpf_async.h common header
HID: bpf: import new kfunc from v6.10 & v6.11
HID: bpf: add support for the XP-Pen Artist Pro 19 (gen2)
HID: bpf: Added updated Kamvas Pro 19 descriptor
HID: bpf: Suppress bogus F13 trigger on Sirius keyboard full fan shortcut
HID: bpf: Add support for the default firmware mode of the Huion K20
...
Highlights:
- alienware-wmi: Refactor and split WMAX/legacy drivers
- dell-ddv:
- Correct +0.1 offset in temperature
- Use the power supply extension mechanism for battery temperatures
- intel/pmc:
- Refactor init to mostly use a common init function
- Add support for Arrow Lake U/H
- Add support for Panther Lake
- intel/sst:
- Improve multi die handling
- Prefix header search path with sysroot (fixes cross-compiling)
- lenovo-wmi-hotkey-utilities: Support for mic & audio mute LEDs
- samsung-galaxybook: Add driver for Samsung Galaxy Book series
- wmi:
- Rework WCxx/WExx ACPI method handling
- Enable data block collection when the data block is set
- platform/arm:
- Add Huawei Matebook E Go EC driver
- platform/mellanox:
- Relocate to drivers/platform/mellanox/
- mlxbf-bootctl: RTC battery status sysfs support
- Miscellaneous cleanups / refactoring / improvements
The following is an automated shortlog grouped by driver:
alienware-wmi:
- Add a state container for LED control feature
- Add a state container for thermal control methods
- Add alienware-wmi.h
- Add WMI Drivers
- Refactor hdmi, amplifier, deepslp methods
- Refactor LED control methods
- Refactor thermal control methods
- Rename alienware-wmi.c
- Split DMI table
- Split the alienware-wmi driver
- Update alienware-wmi config entries
- Update header and module information
amd/pmc:
- fix leak in probe()
- Move macros and structures to the PMC header file
- Notify user when platform does not support s0ix transition
- Remove unnecessary line breaks
- Use managed APIs for mutex
amd/pmf:
- convert timeouts to secs_to_jiffies()
amd:
- Use *-y instead of *-objs in Makefiles
arm64:
- add Huawei Matebook E Go EC driver
arm64: dts: qcom: gaokun3:
- Add Embedded Controller node
compal-laptop:
- Do not include <linux/fb.h>
dell-ddv:
- Fix temperature calculation
- Use devm_battery_hook_register
- Use the power supply extension mechanism
dell: dell-wmi-sysman:
- Use *-y instead of *-objs in Makefile
dell:
- Modify Makefile alignment
- Use *-y instead of *-objs in Makefile
dell-uart-backlight:
- Make dell_uart_bl_serdev_driver static
dt-bindings: platform:
- Add Huawei Matebook E Go EC
hp-bioscfg:
- Replace deprecated strncpy() with strscpy()
- Use wmi_instance_count()
hp:
- Use *-y instead of *-objs in Makefile
hwmon:
- (hp-wmi-sensors) Use the WMI bus API when accessing sensors
ideapad-laptop:
- use dev_groups to register attribute groups
int3472:
- Call "func" "con_id" instead
intel/pmc:
- Add Arrow Lake U/H support to intel_pmc_core driver
- Add Panther Lake support to intel_pmc_core
- Create generic_core_init() for all platforms
- Make tgl_core_generic_init() static
- Move arch specific action to init function
- Remove duplicate enum
- Remove simple init functions
- Remove unnecessary declarations in header
- Remove unneeded extern keyword in header
intel:
- Use *-y instead of *-objs in Makefile
irqdomain: platform/x86:
- Switch to irq_domain_create_linear()
lenovo-wmi-hotkey-utilities.c:
- Support for mic and audio mute LEDs
lenovo-yoga-tab2-pro-1380-fastcharger:
- Make symbol static
MAINTAINERS:
- Add documentation reference for Mellanox platform
- Update ALIENWARE WMI DRIVER entry
mellanox:
- Relocate mlx-platform driver
mlxbf-bootctl:
- Support sysfs entries for RTC battery status
mlx-platform:
- Change register name
- Cosmetic changes
samsung-galaxybook:
- Add samsung-galaxybook driver
- Fix block_recording not supported logic
sonypi:
- Use str_on_off() helper in sonypi_display_info()
think-lmi:
- Use ACPI object when extracting strings
- Use WMI bus API when accessing BIOS settings
thinkpad_acpi:
- check the return value of devm_mutex_init()
- convert timeouts to secs_to_jiffies()
- Do not include <linux/fb.h>
- Move HWMON initialization to tpacpi_hwmon_pdriver's probe
- Move subdriver initialization to tpacpi_pdriver's probe.
tools/power/x86/intel-speed-select:
- Die ID for IO dies
- Fix the condition to check multi die system
- Prefix header search path with sysroot
- Prevent increasing MAX_DIE_PER_PACKAGE
- v1.22 release
wmi:
- Call WCxx methods when setting data blocks
- Rework WCxx/WExx ACPI method handling
- Update documentation regarding the GUID-based API
- Use devres to disable the WMI device
x86-android-tablets:
- Add select POWER_SUPPLY to Kconfig
Merges:
- Merge branch 'fixes' into for-next
- Merge branch 'intel-sst' of https://github.com/spandruvada/linux-kernel into review-ilpo-next
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Merge tag 'platform-drivers-x86-v6.15-1' of git://git.kernel.org/pub/scm/linux/kernel/git/pdx86/platform-drivers-x86
Pull x86 platform drivers updates from Ilpo Järvinen:
- alienware-wmi:
- Refactor and split WMAX/legacy drivers
- dell-ddv:
- Correct +0.1 offset in temperature
- Use the power supply extension mechanism for battery temperatures
- intel/pmc:
- Refactor init to mostly use a common init function
- Add support for Arrow Lake U/H
- Add support for Panther Lake
- intel/sst:
- Improve multi die handling
- Prefix header search path with sysroot (fixes cross-compiling)
- lenovo-wmi-hotkey-utilities:
- Support for mic & audio mute LEDs
- samsung-galaxybook:
- Add driver for Samsung Galaxy Book series
- wmi:
- Rework WCxx/WExx ACPI method handling
- Enable data block collection when the data block is set
- platform/arm:
- Add Huawei Matebook E Go EC driver
- platform/mellanox:
- Relocate to drivers/platform/mellanox/
- mlxbf-bootctl:
- RTC battery status sysfs support
- Miscellaneous cleanups / refactoring / improvements
* tag 'platform-drivers-x86-v6.15-1' of git://git.kernel.org/pub/scm/linux/kernel/git/pdx86/platform-drivers-x86: (75 commits)
platform/x86: x86-android-tablets: Add select POWER_SUPPLY to Kconfig
platform/x86/amd/pmf: convert timeouts to secs_to_jiffies()
platform/x86: thinkpad_acpi: convert timeouts to secs_to_jiffies()
irqdomain: platform/x86: Switch to irq_domain_create_linear()
platform/x86/amd/pmc: fix leak in probe()
tools/power/x86/intel-speed-select: v1.22 release
tools/power/x86/intel-speed-select: Prefix header search path with sysroot
tools/power/x86/intel-speed-select: Die ID for IO dies
tools/power/x86/intel-speed-select: Fix the condition to check multi die system
tools/power/x86/intel-speed-select: Prevent increasing MAX_DIE_PER_PACKAGE
platform/x86/amd/pmc: Use managed APIs for mutex
platform/x86/amd/pmc: Remove unnecessary line breaks
platform/x86/amd/pmc: Move macros and structures to the PMC header file
platform/x86/amd/pmc: Notify user when platform does not support s0ix transition
platform/x86: dell-ddv: Use the power supply extension mechanism
platform/x86: dell-ddv: Use devm_battery_hook_register
platform/x86: dell-ddv: Fix temperature calculation
platform/x86: thinkpad_acpi: check the return value of devm_mutex_init()
platform/x86: samsung-galaxybook: Fix block_recording not supported logic
platform/x86: dell-uart-backlight: Make dell_uart_bl_serdev_driver static
...
Arnd Bergmann
Markus Elfring
Raag Jadav
Zsolt Kajtar
Jann Horn
Eric Biggers
Vivek Kasireddy
Andrea Righi
Jake Hillion
Linus Torvalds
Kent Overstreet
Matt Roper
Tejun Heo
Dmitry Osipenko
Pali Rohár
Wang Zhaolong
Namjae Jeon
Aman
Steve French
Takashi Iwai
Stephen Boyd