A remove callback just returning 0 is equivalent to no remove callback
at all. So drop the useless function.
Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Reviewed-by: Claudiu Beznea <claudiu.beznea@microchip.com>
Link: https://lore.kernel.org/r/20221212205406.3771071-5-u.kleine-koenig@pengutronix.de
Signed-off-by: Mark Brown <broonie@kernel.org>
A remove callback just returning 0 is equivalent to no remove callback
at all. So drop the useless function.
Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Reviewed-by: Claudiu Beznea <claudiu.beznea@microchip.com>
Link: https://lore.kernel.org/r/20221212205406.3771071-4-u.kleine-koenig@pengutronix.de
Signed-off-by: Mark Brown <broonie@kernel.org>
If the sdev->fw_trace_is_supported is true then we must have the fw_tracing
ops set, no need to check again.
Signed-off-by: Peter Ujfalusi <peter.ujfalusi@linux.intel.com>
Reviewed-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Reviewed-by: Ranjani Sridharan <ranjani.sridharan@linux.intel.com>
Reviewed-by: Bard Liao <yung-chuan.liao@linux.intel.com>
Reviewed-by: Rander Wang <rander.wang@intel.com>
Link: https://lore.kernel.org/r/20221221102328.9635-12-peter.ujfalusi@linux.intel.com
Signed-off-by: Mark Brown <broonie@kernel.org>
For the sake of safety use the sof_ipc_get_ops() to fetch the fw_tracing
ops to avoid cases when either sdev->ipc or sdev->ipc->ops might be NULL.
Signed-off-by: Peter Ujfalusi <peter.ujfalusi@linux.intel.com>
Reviewed-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Reviewed-by: Ranjani Sridharan <ranjani.sridharan@linux.intel.com>
Reviewed-by: Bard Liao <yung-chuan.liao@linux.intel.com>
Reviewed-by: Rander Wang <rander.wang@intel.com>
Link: https://lore.kernel.org/r/20221221102328.9635-11-peter.ujfalusi@linux.intel.com
Signed-off-by: Mark Brown <broonie@kernel.org>
The code treats the fw_tracing as optional feature but the documentation
was not reflecting this.
Correct it by explicitly stating that the fw_tracing is optional.
Signed-off-by: Peter Ujfalusi <peter.ujfalusi@linux.intel.com>
Reviewed-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Reviewed-by: Ranjani Sridharan <ranjani.sridharan@linux.intel.com>
Reviewed-by: Bard Liao <yung-chuan.liao@linux.intel.com>
Reviewed-by: Rander Wang <rander.wang@intel.com>
Link: https://lore.kernel.org/r/20221221102328.9635-10-peter.ujfalusi@linux.intel.com
Signed-off-by: Mark Brown <broonie@kernel.org>
The IPC ops are optional, but they require that the ops struct is to be
allocated with all callbacks set to NULL.
Update the code to extend the optionality to:
sdev->ipc == NULL
sdev->ipc->ops == NULL
sdev->ipc->ops->[pm/tplg] == NULL (treated optional for pm currently)
sdev->ipc->ops->[pm/tplg]->ops == NULL (treated optional currently)
Signed-off-by: Peter Ujfalusi <peter.ujfalusi@linux.intel.com>
Reviewed-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Reviewed-by: Ranjani Sridharan <ranjani.sridharan@linux.intel.com>
Reviewed-by: Bard Liao <yung-chuan.liao@linux.intel.com>
Reviewed-by: Rander Wang <rander.wang@intel.com>
Link: https://lore.kernel.org/r/20221221102328.9635-9-peter.ujfalusi@linux.intel.com
Signed-off-by: Mark Brown <broonie@kernel.org>
The IPC ops are optional, but they require that the ops struct is to be
allocated with all callbacks set to NULL.
Update the code to extend the optionality to:
sdev->ipc == NULL
sdev->ipc->ops == NULL
sdev->ipc->ops->[tplg] == NULL
sdev->ipc->ops->[tplg]->ops == NULL (treated optional currently)
At the same time standardize the naming of the ops pointer to tplg_ops
Signed-off-by: Peter Ujfalusi <peter.ujfalusi@linux.intel.com>
Reviewed-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Reviewed-by: Ranjani Sridharan <ranjani.sridharan@linux.intel.com>
Reviewed-by: Bard Liao <yung-chuan.liao@linux.intel.com>
Reviewed-by: Rander Wang <rander.wang@intel.com>
Link: https://lore.kernel.org/r/20221221102328.9635-8-peter.ujfalusi@linux.intel.com
Signed-off-by: Mark Brown <broonie@kernel.org>
The IPC ops are optional, but they require that the ops struct is to be
allocated with all callbacks set to NULL.
Update the code to extend the optionality to:
sdev->ipc == NULL
sdev->ipc->ops == NULL
sdev->ipc->ops->[ops_group] == NULL
sdev->ipc->ops->[pcmops_group]->ops == NULL (treated optional currently)
Signed-off-by: Peter Ujfalusi <peter.ujfalusi@linux.intel.com>
Reviewed-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Reviewed-by: Ranjani Sridharan <ranjani.sridharan@linux.intel.com>
Reviewed-by: Bard Liao <yung-chuan.liao@linux.intel.com>
Reviewed-by: Rander Wang <rander.wang@intel.com>
Link: https://lore.kernel.org/r/20221221102328.9635-7-peter.ujfalusi@linux.intel.com
Signed-off-by: Mark Brown <broonie@kernel.org>
The IPC ops are optional, but they require that the ops struct is to be
allocated with all callbacks set to NULL.
Update the code to extend the optionality to:
sdev->ipc == NULL
sdev->ipc->ops == NULL
sdev->ipc->ops->[tplg] == NULL
sdev->ipc->ops->[tplg]->control == NULL
sdev->ipc->ops->[tplg]->control->ops == NULL (treated optional currently)
Signed-off-by: Peter Ujfalusi <peter.ujfalusi@linux.intel.com>
Reviewed-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Reviewed-by: Ranjani Sridharan <ranjani.sridharan@linux.intel.com>
Reviewed-by: Bard Liao <yung-chuan.liao@linux.intel.com>
Reviewed-by: Rander Wang <rander.wang@intel.com>
Link: https://lore.kernel.org/r/20221221102328.9635-6-peter.ujfalusi@linux.intel.com
Signed-off-by: Mark Brown <broonie@kernel.org>
The IPC ops are optional, but they require that the ops struct is to be
allocated with all callbacks set to NULL.
Update the code to extend the optionality to:
sdev->ipc == NULL
sdev->ipc->ops == NULL
sdev->ipc->ops->[pcm] == NULL
sdev->ipc->ops->[pcm]->ops == NULL (treated optional currently)
Signed-off-by: Peter Ujfalusi <peter.ujfalusi@linux.intel.com>
Reviewed-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Reviewed-by: Ranjani Sridharan <ranjani.sridharan@linux.intel.com>
Reviewed-by: Bard Liao <yung-chuan.liao@linux.intel.com>
Reviewed-by: Rander Wang <rander.wang@intel.com>
Link: https://lore.kernel.org/r/20221221102328.9635-5-peter.ujfalusi@linux.intel.com
Signed-off-by: Mark Brown <broonie@kernel.org>
In preparation to a case when the DSP is not used.
In this case the IPC communication itself has no meaning and we might
not even have sdev->ipc allocated at all.
The sof_ipc_get_ops() macro can be used to get a named IPC ops struct or
return NULL if the sdev->ipc is not allocated.
Signed-off-by: Peter Ujfalusi <peter.ujfalusi@linux.intel.com>
Reviewed-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Reviewed-by: Ranjani Sridharan <ranjani.sridharan@linux.intel.com>
Reviewed-by: Bard Liao <yung-chuan.liao@linux.intel.com>
Reviewed-by: Rander Wang <rander.wang@intel.com>
Link: https://lore.kernel.org/r/20221221102328.9635-4-peter.ujfalusi@linux.intel.com
Signed-off-by: Mark Brown <broonie@kernel.org>
The core treats all function pointer in sof_ipc_tplg_ops as optional.
Update the documentation to reflect this.
Signed-off-by: Peter Ujfalusi <peter.ujfalusi@linux.intel.com>
Reviewed-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Reviewed-by: Ranjani Sridharan <ranjani.sridharan@linux.intel.com>
Reviewed-by: Bard Liao <yung-chuan.liao@linux.intel.com>
Reviewed-by: Rander Wang <rander.wang@intel.com>
Link: https://lore.kernel.org/r/20221221102328.9635-3-peter.ujfalusi@linux.intel.com
Signed-off-by: Mark Brown <broonie@kernel.org>
Other topology ops have been treated as optional, including the route_free.
Handle the route_setup in a conforming way as optional callback.
Note: we do not have checks for the callbacks itself which makes them all
optional in practice.
Signed-off-by: Peter Ujfalusi <peter.ujfalusi@linux.intel.com>
Reviewed-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Reviewed-by: Ranjani Sridharan <ranjani.sridharan@linux.intel.com>
Reviewed-by: Bard Liao <yung-chuan.liao@linux.intel.com>
Reviewed-by: Rander Wang <rander.wang@intel.com>
Link: https://lore.kernel.org/r/20221221102328.9635-2-peter.ujfalusi@linux.intel.com
Signed-off-by: Mark Brown <broonie@kernel.org>
Due to several bugs caused by timers being re-armed after they are
shutdown and just before they are freed, a new state of timers was added
called "shutdown". After a timer is set to this state, then it can no
longer be re-armed.
The following script was run to find all the trivial locations where
del_timer() or del_timer_sync() is called in the same function that the
object holding the timer is freed. It also ignores any locations where
the timer->function is modified between the del_timer*() and the free(),
as that is not considered a "trivial" case.
This was created by using a coccinelle script and the following
commands:
$ cat timer.cocci
@@
expression ptr, slab;
identifier timer, rfield;
@@
(
- del_timer(&ptr->timer);
+ timer_shutdown(&ptr->timer);
|
- del_timer_sync(&ptr->timer);
+ timer_shutdown_sync(&ptr->timer);
)
... when strict
when != ptr->timer
(
kfree_rcu(ptr, rfield);
|
kmem_cache_free(slab, ptr);
|
kfree(ptr);
)
$ spatch timer.cocci . > /tmp/t.patch
$ patch -p1 < /tmp/t.patch
Link: https://lore.kernel.org/lkml/20221123201306.823305113@linutronix.de/
Signed-off-by: Steven Rostedt (Google) <rostedt@goodmis.org>
Acked-by: Pavel Machek <pavel@ucw.cz> [ LED ]
Acked-by: Kalle Valo <kvalo@kernel.org> [ wireless ]
Acked-by: Paolo Abeni <pabeni@redhat.com> [ networking ]
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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Merge tag 'for-netdev' of git://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf
Daniel Borkmann says:
====================
The following pull-request contains BPF updates for your *net* tree.
We've added 7 non-merge commits during the last 5 day(s) which contain
a total of 11 files changed, 231 insertions(+), 3 deletions(-).
The main changes are:
1) Fix a splat in bpf_skb_generic_pop() under CHECKSUM_PARTIAL due to
misuse of skb_postpull_rcsum(), from Jakub Kicinski with test case
from Martin Lau.
2) Fix BPF verifier's nullness propagation when registers are of
type PTR_TO_BTF_ID, from Hao Sun.
3) Fix bpftool build for JIT disassembler under statically built
libllvm, from Anton Protopopov.
4) Fix warnings reported by resolve_btfids when building vmlinux
with CONFIG_SECURITY_NETWORK disabled, from Hou Tao.
5) Minor fix up for BPF selftest gitignore, from Stanislav Fomichev.
====================
Signed-off-by: David S. Miller <davem@davemloft.net>
One driver specific change here which handles the case where a SPI
device for some reason tries to change the bus speed during a message on
fsl_spi hardware, this should be very unusual.
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Merge tag 'spi-fix-v6.2-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/spi
Pull spi fix from Mark Brown:
"One driver specific change here which handles the case where a SPI
device for some reason tries to change the bus speed during a message
on fsl_spi hardware, this should be very unusual"
* tag 'spi-fix-v6.2-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/spi:
spi: fsl_spi: Don't change speed while chipselect is active
Two core fixes here, one for a long standing race which some Qualcomm
systems have started triggering with their UFS driver and another fixing
a problem with supply lookup introduced by the fixes for devm related
use after free issues that were introduced in this merge window.
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Merge tag 'regulator-fix-v6.2-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/regulator
Pull regulator fixes from Mark Brown:
"Two core fixes here, one for a long standing race which some Qualcomm
systems have started triggering with their UFS driver and another
fixing a problem with supply lookup introduced by the fixes for devm
related use after free issues that were introduced in this merge
window"
* tag 'regulator-fix-v6.2-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/regulator:
regulator: core: fix deadlock on regulator enable
regulator: core: Fix resolve supply lookup issue
The check_reserve_boundaries function uses a lot of kernel stack,
and it gets inlined by clang, which makes __drm_test_mm_reserve
use even more of it, to the point of hitting the warning limit:
drivers/gpu/drm/tests/drm_mm_test.c:344:12: error: stack frame size (1048) exceeds limit (1024) in '__drm_test_mm_reserve' [-Werror,-Wframe-larger-than]
When building with gcc, this does not happen, but the structleak
plugin can similarly increase the stack usage and needs to be
disabled, as we do for all other kunit users.
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Reviewed-by: Maíra Canal <mcanal@igalia.com>
Reviewed-by: Nathan Chancellor <nathan@kernel.org>
Signed-off-by: Maíra Canal <mairacanal@riseup.net>
Link: https://patchwork.freedesktop.org/patch/msgid/20221215163511.266214-1-arnd@kernel.org
Use "grep -E" instead of "egrep".
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Merge tag 'coccinelle-6.2' of git://git.kernel.org/pub/scm/linux/kernel/git/jlawall/linux
Pull coccicheck update from Julia Lawall:
"Modernize use of grep in coccicheck:
Use 'grep -E' instead of 'egrep'"
* tag 'coccinelle-6.2' of git://git.kernel.org/pub/scm/linux/kernel/git/jlawall/linux:
scripts: coccicheck: use "grep -E" instead of "egrep"
Shows up when cross-compiling:
HOST_SCRATCH_DIR := $(OUTPUT)/host-tools
vs
SCRATCH_DIR := $(OUTPUT)/tools
HOST_SCRATCH_DIR := $(SCRATCH_DIR)
Reported-by: John Sperbeck <jsperbeck@google.com>
Signed-off-by: Stanislav Fomichev <sdf@google.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Link: https://lore.kernel.org/bpf/20221222213958.2302320-1-sdf@google.com
Hao Lan says:
====================
net: hns3: fix some bug for hns3
There are some bugfixes for the HNS3 ethernet driver. patch#1 fix miss
checking for rx packet. patch#2 fixes VF promisc mode not update
when mac table full bug, and patch#3 fixes a nterrupts not
initialization in VF FLR bug.
====================
Link: https://lore.kernel.org/r/20221222064343.61537-1-lanhao@huawei.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Currently, it missed set HCLGE_VPORT_STATE_PROMISC_CHANGE
flag for VF when vport->overflow_promisc_flags changed.
So the VF won't check whether to update promisc mode in
this case. So add it.
Fixes: 1e6e76101f ("net: hns3: configure promisc mode for VF asynchronously")
Signed-off-by: Jian Shen <shenjian15@huawei.com>
Signed-off-by: Hao Lan <lanhao@huawei.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
For device supports RXD advanced layout, the driver will
return directly if the hardware finish the checksum
calculate. It cause missing L3E checking for ip packets.
Fixes it.
Fixes: 1ddc028ac8 ("net: hns3: refactor out RX completion checksum")
Signed-off-by: Jian Shen <shenjian15@huawei.com>
Signed-off-by: Hao Lan <lanhao@huawei.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Currently keep alive message between PF and VF may be lost and the VF is
unalive in PF. So the VF will not do reset during PF FLR reset process.
This would make the allocated interrupt resources of VF invalid and VF
would't receive or respond to PF any more.
So this patch adds VF interrupts re-initialization during VF FLR for VF
recovery in above cases.
Fixes: 862d969a3a ("net: hns3: do VF's pci re-initialization while PF doing FLR")
Signed-off-by: Jie Wang <wangjie125@huawei.com>
Signed-off-by: Hao Lan <lanhao@huawei.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Fix up the sound code to not pass __GFP_COMP to the non-coherent DMA
allocator, as it copes with that just as badly as the coherent allocator,
and then add a check to make sure no one passes the flag ever again.
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Merge tag 'dma-mapping-2022-12-23' of git://git.infradead.org/users/hch/dma-mapping
Pull dma-mapping fixes from Christoph Hellwig:
"Fix up the sound code to not pass __GFP_COMP to the non-coherent DMA
allocator, as it copes with that just as badly as the coherent
allocator, and then add a check to make sure no one passes the flag
ever again"
* tag 'dma-mapping-2022-12-23' of git://git.infradead.org/users/hch/dma-mapping:
dma-mapping: reject GFP_COMP for noncoherent allocations
ALSA: memalloc: don't use GFP_COMP for non-coherent dma allocations
- improve p9_check_errors to check buffer size instead of msize when possible
(e.g. not zero-copy)
- some more syzbot and KCSAN fixes
- minor headers include cleanup
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Merge tag '9p-for-6.2-rc1' of https://github.com/martinetd/linux
Pull 9p updates from Dominique Martinet:
- improve p9_check_errors to check buffer size instead of msize when
possible (e.g. not zero-copy)
- some more syzbot and KCSAN fixes
- minor headers include cleanup
* tag '9p-for-6.2-rc1' of https://github.com/martinetd/linux:
9p/client: fix data race on req->status
net/9p: fix response size check in p9_check_errors()
net/9p: distinguish zero-copy requests
9p/xen: do not memcpy header into req->rc
9p: set req refcount to zero to avoid uninitialized usage
9p/net: Remove unneeded idr.h #include
9p/fs: Remove unneeded idr.h #include
A few more updates for 6.2 since the last PR: most of changes are
about ASoC device-specific fixes.
- Lots of ASoC Intel AVS extensions and refactoring
- Quirks for ASoC Intel SOF as well as regression fixes
- ASoC Mediatek and Rockchip fixes
- Intel HD-audio HDMI workarounds
- Usual HD- and USB-audio device-specific quirks
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Merge tag 'sound-6.2-rc1-2' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound
Pull more sound updates from Takashi Iwai:
"A few more updates for 6.2: most of changes are about ASoC
device-specific fixes.
- Lots of ASoC Intel AVS extensions and refactoring
- Quirks for ASoC Intel SOF as well as regression fixes
- ASoC Mediatek and Rockchip fixes
- Intel HD-audio HDMI workarounds
- Usual HD- and USB-audio device-specific quirks"
* tag 'sound-6.2-rc1-2' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound: (54 commits)
ALSA: usb-audio: Add new quirk FIXED_RATE for JBL Quantum810 Wireless
ALSA: azt3328: Remove the unused function snd_azf3328_codec_outl()
ASoC: lochnagar: Fix unused lochnagar_of_match warning
ASoC: Intel: Add HP Stream 8 to bytcr_rt5640.c
ASoC: SOF: mediatek: initialize panic_info to zero
ASoC: rt5670: Remove unbalanced pm_runtime_put()
ASoC: Intel: bytcr_rt5640: Add quirk for the Advantech MICA-071 tablet
ASoC: Intel: soc-acpi: update codec addr on 0C11/0C4F product
ASoC: rockchip: spdif: Add missing clk_disable_unprepare() in rk_spdif_runtime_resume()
ASoC: wm8994: Fix potential deadlock
ASoC: mediatek: mt8195: add sof be ops to check audio active
ASoC: SOF: Revert: "core: unregister clients and machine drivers in .shutdown"
ASoC: SOF: Intel: pci-tgl: unblock S5 entry if DMA stop has failed"
ALSA: hda/hdmi: fix stream-id config keep-alive for rt suspend
ALSA: hda/hdmi: set default audio parameters for KAE silent-stream
ALSA: hda/hdmi: fix i915 silent stream programming flow
ALSA: hda: Error out if invalid stream is being setup
ASoC: dt-bindings: fsl-sai: Reinstate i.MX93 SAI compatible string
ASoC: soc-pcm.c: Clear DAIs parameters after stream_active is updated
ASoC: codecs: wcd-clsh: Remove the unused function
...
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Merge tag 'mm-hotfixes-stable-2022-12-22-14-34' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
Pull hotfixes from Andrew Morton:
"Eight fixes, all cc:stable. One is for gcov and the remainder are MM"
* tag 'mm-hotfixes-stable-2022-12-22-14-34' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm:
gcov: add support for checksum field
test_maple_tree: add test for mas_spanning_rebalance() on insufficient data
maple_tree: fix mas_spanning_rebalance() on insufficient data
hugetlb: really allocate vma lock for all sharable vmas
kmsan: export kmsan_handle_urb
kmsan: include linux/vmalloc.h
mm/mempolicy: fix memory leak in set_mempolicy_home_node system call
mm, mremap: fix mremap() expanding vma with addr inside vma
If mem-type is specified in the device tree
it would end up overriding the record_size
field instead of populating mem_type.
As record_size is currently parsed after the
improper assignment with default size 0 it
continued to work as expected regardless of the
value found in the device tree.
Simply changing the target field of the struct
is enough to get mem-type working as expected.
Fixes: 9d843e8faf ("pstore: Add mem_type property DT parsing support")
Cc: stable@vger.kernel.org
Signed-off-by: Luca Stefani <luca@osomprivacy.com>
Signed-off-by: Kees Cook <keescook@chromium.org>
Link: https://lore.kernel.org/r/20221222131049.286288-1-luca@osomprivacy.com
In commit 76d62f24db ("pstore: Switch pmsg_lock to an rt_mutex
to avoid priority inversion") I changed a lock to an rt_mutex.
However, its possible that CONFIG_RT_MUTEXES is not enabled,
which then results in a build failure, as the 0day bot detected:
https://lore.kernel.org/linux-mm/202212211244.TwzWZD3H-lkp@intel.com/
Thus this patch changes CONFIG_PSTORE_PMSG to select
CONFIG_RT_MUTEXES, which ensures the build will not fail.
Cc: Wei Wang <wvw@google.com>
Cc: Midas Chien<midaschieh@google.com>
Cc: Connor O'Brien <connoro@google.com>
Cc: Kees Cook <keescook@chromium.org>
Cc: Anton Vorontsov <anton@enomsg.org>
Cc: Colin Cross <ccross@android.com>
Cc: Tony Luck <tony.luck@intel.com>
Cc: kernel test robot <lkp@intel.com>
Cc: kernel-team@android.com
Fixes: 76d62f24db ("pstore: Switch pmsg_lock to an rt_mutex to avoid priority inversion")
Reported-by: kernel test robot <lkp@intel.com>
Signed-off-by: John Stultz <jstultz@google.com>
Signed-off-by: Kees Cook <keescook@chromium.org>
Link: https://lore.kernel.org/r/20221221051855.15761-1-jstultz@google.com
When CFI_CLANG and KASAN are both enabled, LLVM doesn't generate a
CFI type hash for asan.module_ctor functions in translation units
where CFI is disabled, which leads to a CFI failure during boot when
do_ctors calls the affected constructors:
CFI failure at do_basic_setup+0x64/0x90 (target:
asan.module_ctor+0x0/0x28; expected type: 0xa540670c)
Specifically, this happens because CFI is disabled for
kernel/cfi.c. There's no reason to keep CFI disabled here anymore, so
fix the failure by not filtering out CC_FLAGS_CFI for the file.
Note that https://reviews.llvm.org/rG3b14862f0a96 fixed the issue
where LLVM didn't emit CFI type hashes for any sanitizer constructors,
but now type hashes are emitted correctly for TUs that use CFI.
Link: https://github.com/ClangBuiltLinux/linux/issues/1742
Fixes: 8924560094 ("cfi: Switch to -fsanitize=kcfi")
Reported-by: Mark Rutland <mark.rutland@arm.com>
Signed-off-by: Sami Tolvanen <samitolvanen@google.com>
Signed-off-by: Kees Cook <keescook@chromium.org>
Link: https://lore.kernel.org/r/20221222225747.3538676-1-samitolvanen@google.com
Re-check sp->nx_huge_page_disallowed under the tdp_mmu_pages_lock spinlock
when adding a new shadow page in the TDP MMU. To ensure the NX reclaim
kthread can't see a not-yet-linked shadow page, the page fault path links
the new page table prior to adding the page to possible_nx_huge_pages.
If the page is zapped by different task, e.g. because dirty logging is
disabled, between linking the page and adding it to the list, KVM can end
up triggering use-after-free by adding the zapped SP to the aforementioned
list, as the zapped SP's memory is scheduled for removal via RCU callback.
The bug is detected by the sanity checks guarded by CONFIG_DEBUG_LIST=y,
i.e. the below splat is just one possible signature.
------------[ cut here ]------------
list_add corruption. prev->next should be next (ffffc9000071fa70), but was ffff88811125ee38. (prev=ffff88811125ee38).
WARNING: CPU: 1 PID: 953 at lib/list_debug.c:30 __list_add_valid+0x79/0xa0
Modules linked in: kvm_intel
CPU: 1 PID: 953 Comm: nx_huge_pages_t Tainted: G W 6.1.0-rc4+ #71
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 0.0.0 02/06/2015
RIP: 0010:__list_add_valid+0x79/0xa0
RSP: 0018:ffffc900006efb68 EFLAGS: 00010286
RAX: 0000000000000000 RBX: ffff888116cae8a0 RCX: 0000000000000027
RDX: 0000000000000027 RSI: 0000000100001872 RDI: ffff888277c5b4c8
RBP: ffffc90000717000 R08: ffff888277c5b4c0 R09: ffffc900006efa08
R10: 0000000000199998 R11: 0000000000199a20 R12: ffff888116cae930
R13: ffff88811125ee38 R14: ffffc9000071fa70 R15: ffff88810b794f90
FS: 00007fc0415d2740(0000) GS:ffff888277c40000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000000 CR3: 0000000115201006 CR4: 0000000000172ea0
Call Trace:
<TASK>
track_possible_nx_huge_page+0x53/0x80
kvm_tdp_mmu_map+0x242/0x2c0
kvm_tdp_page_fault+0x10c/0x130
kvm_mmu_page_fault+0x103/0x680
vmx_handle_exit+0x132/0x5a0 [kvm_intel]
vcpu_enter_guest+0x60c/0x16f0
kvm_arch_vcpu_ioctl_run+0x1e2/0x9d0
kvm_vcpu_ioctl+0x271/0x660
__x64_sys_ioctl+0x80/0xb0
do_syscall_64+0x2b/0x50
entry_SYSCALL_64_after_hwframe+0x46/0xb0
</TASK>
---[ end trace 0000000000000000 ]---
Fixes: 61f9447854 ("KVM: x86/mmu: Set disallowed_nx_huge_page in TDP MMU before setting SPTE")
Reported-by: Greg Thelen <gthelen@google.com>
Analyzed-by: David Matlack <dmatlack@google.com>
Cc: David Matlack <dmatlack@google.com>
Cc: Ben Gardon <bgardon@google.com>
Cc: Mingwei Zhang <mizhang@google.com>
Signed-off-by: Sean Christopherson <seanjc@google.com>
Message-Id: <20221213033030.83345-4-seanjc@google.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Map the leaf SPTE when handling a TDP MMU page fault if and only if the
target level is reached. A recent commit reworked the retry logic and
incorrectly assumed that walking SPTEs would never "fail", as the loop
either bails (retries) or installs parent SPs. However, the iterator
itself will bail early if it detects a frozen (REMOVED) SPTE when
stepping down. The TDP iterator also rereads the current SPTE before
stepping down specifically to avoid walking into a part of the tree that
is being removed, which means it's possible to terminate the loop without
the guts of the loop observing the frozen SPTE, e.g. if a different task
zaps a parent SPTE between the initial read and try_step_down()'s refresh.
Mapping a leaf SPTE at the wrong level results in all kinds of badness as
page table walkers interpret the SPTE as a page table, not a leaf, and
walk into the weeds.
------------[ cut here ]------------
WARNING: CPU: 1 PID: 1025 at arch/x86/kvm/mmu/tdp_mmu.c:1070 kvm_tdp_mmu_map+0x481/0x510
Modules linked in: kvm_intel
CPU: 1 PID: 1025 Comm: nx_huge_pages_t Tainted: G W 6.1.0-rc4+ #64
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 0.0.0 02/06/2015
RIP: 0010:kvm_tdp_mmu_map+0x481/0x510
RSP: 0018:ffffc9000072fba8 EFLAGS: 00010286
RAX: 0000000000000000 RBX: ffffc9000072fcc0 RCX: 0000000000000027
RDX: 0000000000000027 RSI: 00000000ffffdfff RDI: ffff888277c5b4c8
RBP: ffff888107d45a10 R08: ffff888277c5b4c0 R09: ffffc9000072fa48
R10: 0000000000000001 R11: 0000000000000001 R12: ffffc9000073a0e0
R13: ffff88810fc54800 R14: ffff888107d1ae60 R15: ffff88810fc54f90
FS: 00007fba9f853740(0000) GS:ffff888277c40000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000000 CR3: 000000010aa7a003 CR4: 0000000000172ea0
Call Trace:
<TASK>
kvm_tdp_page_fault+0x10c/0x130
kvm_mmu_page_fault+0x103/0x680
vmx_handle_exit+0x132/0x5a0 [kvm_intel]
vcpu_enter_guest+0x60c/0x16f0
kvm_arch_vcpu_ioctl_run+0x1e2/0x9d0
kvm_vcpu_ioctl+0x271/0x660
__x64_sys_ioctl+0x80/0xb0
do_syscall_64+0x2b/0x50
entry_SYSCALL_64_after_hwframe+0x46/0xb0
</TASK>
---[ end trace 0000000000000000 ]---
Invalid SPTE change: cannot replace a present leaf
SPTE with another present leaf SPTE mapping a
different PFN!
as_id: 0 gfn: 100200 old_spte: 600000112400bf3 new_spte: 6000001126009f3 level: 2
------------[ cut here ]------------
kernel BUG at arch/x86/kvm/mmu/tdp_mmu.c:559!
invalid opcode: 0000 [#1] SMP
CPU: 1 PID: 1025 Comm: nx_huge_pages_t Tainted: G W 6.1.0-rc4+ #64
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 0.0.0 02/06/2015
RIP: 0010:__handle_changed_spte.cold+0x95/0x9c
RSP: 0018:ffffc9000072faf8 EFLAGS: 00010246
RAX: 00000000000000c1 RBX: ffffc90000731000 RCX: 0000000000000027
RDX: 0000000000000000 RSI: 00000000ffffdfff RDI: ffff888277c5b4c8
RBP: 0600000112400bf3 R08: ffff888277c5b4c0 R09: ffffc9000072f9a0
R10: 0000000000000001 R11: 0000000000000001 R12: 06000001126009f3
R13: 0000000000000002 R14: 0000000012600901 R15: 0000000012400b01
FS: 00007fba9f853740(0000) GS:ffff888277c40000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000000 CR3: 000000010aa7a003 CR4: 0000000000172ea0
Call Trace:
<TASK>
kvm_tdp_mmu_map+0x3b0/0x510
kvm_tdp_page_fault+0x10c/0x130
kvm_mmu_page_fault+0x103/0x680
vmx_handle_exit+0x132/0x5a0 [kvm_intel]
vcpu_enter_guest+0x60c/0x16f0
kvm_arch_vcpu_ioctl_run+0x1e2/0x9d0
kvm_vcpu_ioctl+0x271/0x660
__x64_sys_ioctl+0x80/0xb0
do_syscall_64+0x2b/0x50
entry_SYSCALL_64_after_hwframe+0x46/0xb0
</TASK>
Modules linked in: kvm_intel
---[ end trace 0000000000000000 ]---
Fixes: 63d28a25e0 ("KVM: x86/mmu: simplify kvm_tdp_mmu_map flow when guest has to retry")
Cc: Robert Hoo <robert.hu@linux.intel.com>
Signed-off-by: Sean Christopherson <seanjc@google.com>
Message-Id: <20221213033030.83345-3-seanjc@google.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
When stuffing the allowed secondary execution controls for nested VMX in
response to CPUID updates, don't set the allowed-1 bit for a feature that
isn't supported by KVM, i.e. isn't allowed by the canonical vmcs_config.
WARN if KVM attempts to manipulate a feature that isn't supported. All
features that are currently stuffed are always advertised to L1 for
nested VMX if they are supported in KVM's base configuration, and no
additional features should ever be added to the CPUID-induced stuffing
(updating VMX MSRs in response to CPUID updates is a long-standing KVM
flaw that is slowly being fixed).
Signed-off-by: Sean Christopherson <seanjc@google.com>
Message-Id: <20221213062306.667649-3-seanjc@google.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Set ENABLE_USR_WAIT_PAUSE in KVM's supported VMX MSR configuration if the
feature is supported in hardware and enabled in KVM's base, non-nested
configuration, i.e. expose ENABLE_USR_WAIT_PAUSE to L1 if it's supported.
This fixes a bug where saving/restoring, i.e. migrating, a vCPU will fail
if WAITPKG (the associated CPUID feature) is enabled for the vCPU, and
obviously allows L1 to enable the feature for L2.
KVM already effectively exposes ENABLE_USR_WAIT_PAUSE to L1 by stuffing
the allowed-1 control ina vCPU's virtual MSR_IA32_VMX_PROCBASED_CTLS2 when
updating secondary controls in response to KVM_SET_CPUID(2), but (a) that
depends on flawed code (KVM shouldn't touch VMX MSRs in response to CPUID
updates) and (b) runs afoul of vmx_restore_control_msr()'s restriction
that the guest value must be a strict subset of the supported host value.
Although no past commit explicitly enabled nested support for WAITPKG,
doing so is safe and functionally correct from an architectural
perspective as no additional KVM support is needed to virtualize TPAUSE,
UMONITOR, and UMWAIT for L2 relative to L1, and KVM already forwards
VM-Exits to L1 as necessary (commit bf653b78f9, "KVM: vmx: Introduce
handle_unexpected_vmexit and handle WAITPKG vmexit").
Note, KVM always keeps the hosts MSR_IA32_UMWAIT_CONTROL resident in
hardware, i.e. always runs both L1 and L2 with the host's power management
settings for TPAUSE and UMWAIT. See commit bf09fb6cba ("KVM: VMX: Stop
context switching MSR_IA32_UMWAIT_CONTROL") for more details.
Fixes: e69e72faa3 ("KVM: x86: Add support for user wait instructions")
Cc: stable@vger.kernel.org
Reported-by: Aaron Lewis <aaronlewis@google.com>
Reported-by: Yu Zhang <yu.c.zhang@linux.intel.com>
Signed-off-by: Sean Christopherson <seanjc@google.com>
Reviewed-by: Jim Mattson <jmattson@google.com>
Message-Id: <20221213062306.667649-2-seanjc@google.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Explicitly drop the result of kvm_vcpu_write_guest() when writing the
"launch state" as part of VMCLEAR emulation, and add a comment to call
out that KVM's behavior is architecturally valid. Intel's pseudocode
effectively says that VMCLEAR is a nop if the target VMCS address isn't
in memory, e.g. if the address points at MMIO.
Add a FIXME to call out that suppressing failures on __copy_to_user() is
wrong, as memory (a memslot) does exist in that case. Punt the issue to
the future as open coding kvm_vcpu_write_guest() just to make sure the
guest dies with -EFAULT isn't worth the extra complexity. The flaw will
need to be addressed if KVM ever does something intelligent on uaccess
failures, e.g. to support post-copy demand paging, but in that case KVM
will need a more thorough overhaul, i.e. VMCLEAR shouldn't need to open
code a core KVM helper.
No functional change intended.
Reported-by: coverity-bot <keescook+coverity-bot@chromium.org>
Addresses-Coverity-ID: 1527765 ("Error handling issues")
Fixes: 587d7e72ae ("kvm: nVMX: VMCLEAR should not cause the vCPU to shut down")
Cc: Jim Mattson <jmattson@google.com>
Signed-off-by: Sean Christopherson <seanjc@google.com>
Message-Id: <20221220154224.526568-1-seanjc@google.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
