This struct member was used to track whether a domain
change requires updates to the device-table and IOMMU cache
flushes. The problem is, that access to this field is racy
since locking in the common mapping code-paths has been
eliminated.
Move the updated field to the stack to get rid of all
potential races and remove the field from the struct.
Fixes: dcb4ee808767 ("iommu/amd: Relax locking in dma_ops path") Reviewed-by: Filippo Sironi <sironi@amazon.de> Reviewed-by: Jerry Snitselaar <jsnitsel@redhat.com> Signed-off-by: Joerg Roedel <jroedel@suse.de>
Andrei Dulea [Fri, 13 Sep 2019 14:42:31 +0000 (16:42 +0200)]
iommu/amd: Unmap all L7 PTEs when downgrading page-sizes
When replacing a large mapping created with page-mode 7 (i.e.
non-default page size), tear down the entire series of replicated PTEs.
Besides providing access to the old mapping, another thing that might go
wrong with this issue is on the fetch_pte() code path that can return a
PDE entry of the newly re-mapped range.
While at it, make sure that we flush the TLB in case alloc_pte() fails
and returns NULL at a lower level.
Fixes: ab8a4925a149 ("iommu/amd: Allow downgrading page-sizes in alloc_pte()") Signed-off-by: Andrei Dulea <adulea@amazon.de>
Andrei Dulea [Fri, 13 Sep 2019 14:42:30 +0000 (16:42 +0200)]
iommu/amd: Introduce first_pte_l7() helper
Given an arbitrary pte that is part of a large mapping, this function
returns the first pte of the series (and optionally the mapped size and
number of PTEs)
It will be re-used in a subsequent patch to replace an existing L7
mapping.
Fixes: ab8a4925a149 ("iommu/amd: Allow downgrading page-sizes in alloc_pte()") Signed-off-by: Andrei Dulea <adulea@amazon.de>
Andrei Dulea [Fri, 13 Sep 2019 14:42:29 +0000 (16:42 +0200)]
iommu/amd: Fix downgrading default page-sizes in alloc_pte()
Downgrading an existing large mapping to a mapping using smaller
page-sizes works only for the mappings created with page-mode 7 (i.e.
non-default page size).
Treat large mappings created with page-mode 0 (i.e. default page size)
like a non-present mapping and allow to overwrite it in alloc_pte().
While around, make sure that we flush the TLB only if we change an
existing mapping, otherwise we might end up acting on garbage PTEs.
Fixes: ab8a4925a149 ("iommu/amd: Allow downgrading page-sizes in alloc_pte()") Signed-off-by: Andrei Dulea <adulea@amazon.de>
Chris Wilson [Mon, 9 Sep 2019 11:00:10 +0000 (12:00 +0100)]
iommu/vt-d: Declare Broadwell igfx dmar support snafu
Despite the widespread and complete failure of Broadwell integrated
graphics when DMAR is enabled, known over the years, we have never been
able to root cause the issue. Instead, we let the failure undermine our
confidence in the iommu system itself when we should be pushing for it to
be always enabled. Quirk away Broadwell and remove the rotten apple.
References: https://bugs.freedesktop.org/show_bug.cgi?id=89360 Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk> Cc: Lu Baolu <baolu.lu@linux.intel.com> Cc: Martin Peres <martin.peres@linux.intel.com> Cc: Joerg Roedel <joro@8bytes.org> Reviewed-by: Lu Baolu <baolu.lu@linux.intel.com> Signed-off-by: Joerg Roedel <jroedel@suse.de>
Kyung Min Park [Fri, 6 Sep 2019 18:14:02 +0000 (11:14 -0700)]
iommu/vt-d: Add Scalable Mode fault information
Intel VT-d specification revision 3 added support for Scalable Mode
Translation for DMA remapping. Add the Scalable Mode fault reasons to
show detailed fault reasons when the translation fault happens.
Lu Baolu [Fri, 6 Sep 2019 06:14:52 +0000 (14:14 +0800)]
iommu/vt-d: Use bounce buffer for untrusted devices
The Intel VT-d hardware uses paging for DMA remapping.
The minimum mapped window is a page size. The device
drivers may map buffers not filling the whole IOMMU
window. This allows the device to access to possibly
unrelated memory and a malicious device could exploit
this to perform DMA attacks. To address this, the
Intel IOMMU driver will use bounce pages for those
buffers which don't fill whole IOMMU pages.
Cc: Ashok Raj <ashok.raj@intel.com> Cc: Jacob Pan <jacob.jun.pan@linux.intel.com> Cc: Kevin Tian <kevin.tian@intel.com> Signed-off-by: Lu Baolu <baolu.lu@linux.intel.com> Tested-by: Xu Pengfei <pengfei.xu@intel.com> Tested-by: Mika Westerberg <mika.westerberg@intel.com> Signed-off-by: Joerg Roedel <jroedel@suse.de>
Lu Baolu [Fri, 6 Sep 2019 06:14:51 +0000 (14:14 +0800)]
iommu/vt-d: Add trace events for device dma map/unmap
This adds trace support for the Intel IOMMU driver. It
also declares some events which could be used to trace
the events when an IOVA is being mapped or unmapped in
a domain.
Cc: Ashok Raj <ashok.raj@intel.com> Cc: Jacob Pan <jacob.jun.pan@linux.intel.com> Cc: Kevin Tian <kevin.tian@intel.com> Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com> Signed-off-by: Lu Baolu <baolu.lu@linux.intel.com> Reviewed-by: Steven Rostedt (VMware) <rostedt@goodmis.org> Signed-off-by: Joerg Roedel <jroedel@suse.de>
Lu Baolu [Fri, 6 Sep 2019 06:14:50 +0000 (14:14 +0800)]
iommu/vt-d: Don't switch off swiotlb if bounce page is used
The bounce page implementation depends on swiotlb. Hence, don't
switch off swiotlb if the system has untrusted devices or could
potentially be hot-added with any untrusted devices.
Cc: Ashok Raj <ashok.raj@intel.com> Cc: Jacob Pan <jacob.jun.pan@linux.intel.com> Cc: Kevin Tian <kevin.tian@intel.com> Signed-off-by: Lu Baolu <baolu.lu@linux.intel.com> Reviewed-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Joerg Roedel <jroedel@suse.de>
This adds a helper to check whether a device needs to
use bounce buffer. It also provides a boot time option
to disable the bounce buffer. Users can use this to
prevent the iommu driver from using the bounce buffer
for performance gain.
Cc: Ashok Raj <ashok.raj@intel.com> Cc: Jacob Pan <jacob.jun.pan@linux.intel.com> Cc: Kevin Tian <kevin.tian@intel.com> Signed-off-by: Lu Baolu <baolu.lu@linux.intel.com> Tested-by: Xu Pengfei <pengfei.xu@intel.com> Tested-by: Mika Westerberg <mika.westerberg@intel.com> Signed-off-by: Joerg Roedel <jroedel@suse.de>
Lu Baolu [Fri, 6 Sep 2019 06:14:48 +0000 (14:14 +0800)]
swiotlb: Split size parameter to map/unmap APIs
This splits the size parameter to swiotlb_tbl_map_single() and
swiotlb_tbl_unmap_single() into an alloc_size and a mapping_size
parameter, where the latter one is rounded up to the iommu page
size.
Suggested-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Lu Baolu <baolu.lu@linux.intel.com> Reviewed-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Joerg Roedel <jroedel@suse.de>
Merge tag 'gpio-v5.3-5' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-gpio
Pull GPIO fixes from Linus Walleij:
"All related to the PCA953x driver when handling chips with more than 8
ports, now that works again"
* tag 'gpio-v5.3-5' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-gpio:
gpio: pca953x: use pca953x_read_regs instead of regmap_bulk_read
gpio: pca953x: correct type of reg_direction
Nick Desaulniers [Wed, 28 Aug 2019 22:55:23 +0000 (15:55 -0700)]
include/linux/compiler.h: fix Oops for Clang-compiled kernels
GCC unescapes escaped string section names while Clang does not. Because
__section uses the `#` stringification operator for the section name, it
doesn't need to be escaped.
This fixes an Oops observed in distro's that use systemd and not
net.core.bpf_jit_enable=1, when their kernels are compiled with Clang.
Chris Wilson reports that it breaks his CPU hotplug test scripts. In
particular, it breaks offlining and then re-onlining the boot CPU, which
we treat specially (and the BIOS does too).
The symptoms are that we can offline the CPU, but it then does not come
back online again:
smpboot: CPU 0 is now offline
smpboot: Booting Node 0 Processor 0 APIC 0x0
smpboot: do_boot_cpu failed(-1) to wakeup CPU#0
Thomas says he knows why it's broken (my personal suspicion: our magic
handling of the "cpu0_logical_apicid" thing), but for 5.3 the right fix
is to just revert it, since we've never touched the LDR bits before, and
it's not worth the risk to do anything else at this stage.
[ Hotpluging of the boot CPU is special anyway, and should be off by
default. See the "BOOTPARAM_HOTPLUG_CPU0" config option and the
cpu0_hotplug kernel parameter.
In general you should not do it, and it has various known limitations
(hibernate and suspend require the boot CPU, for example).
But it should work, even if the boot CPU is special and needs careful
treatment - Linus ]
Merge tag 'char-misc-5.3-rc8' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc
Pull Documentation updates from Greg KH:
"A few small patches for the documenation file that came in through the
char-misc tree in -rc7 for your tree.
They fix the mistake in the .rst format that kept the table of
companies from showing up in the html output, and most importantly,
add people's names to the list showing support for our process"
* tag 'char-misc-5.3-rc8' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc:
Documentation/process: Add Qualcomm process ambassador for hardware security issues
Documentation/process/embargoed-hardware-issues: Microsoft ambassador
Documentation/process: Add Google contact for embargoed hardware issues
Documentation/process: Volunteer as the ambassador for Xen
Merge tag 'libnvdimm-fix-5.3-rc8' of git://git.kernel.org/pub/scm/linux/kernel/git/nvdimm/nvdimm
Pull libnvdimm fix from Dan Williams:
"Restore support for 1GB alignment namespaces, truncate the end of
misaligned namespaces"
* tag 'libnvdimm-fix-5.3-rc8' of git://git.kernel.org/pub/scm/linux/kernel/git/nvdimm/nvdimm:
libnvdimm/pfn: Fix namespace creation on misaligned addresses
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input
Pull input fix from Dmitry Torokhov:
"A tiny update from Benjamin removing a mistakenly added Elan PNP ID so
that the device is again handled by hid-multitouch"
Merge tag 'configfs-for-5.3' of git://git.infradead.org/users/hch/configfs
Pull configfs fixes from Christoph Hellwig:
"Late configfs fixes from Al that fix pretty nasty removal vs attribute
access races"
* tag 'configfs-for-5.3' of git://git.infradead.org/users/hch/configfs:
configfs: provide exclusion between IO and removals
configfs: new object reprsenting tree fragments
configfs_register_group() shouldn't be (and isn't) called in rmdirable parts
configfs: stash the data we need into configfs_buffer at open time
Merge tag 'iommu-fixes-v5.3-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/joro/iommu
Pull IOMMU fixes from Joerg Roedel:
- Revert an Intel VT-d patch that caused problems for some users.
- Removal of a feature in the Intel VT-d driver that was never
supported in hardware. This qualifies as a fix because the code for
this feature sets reserved bits in the invalidation queue descriptor,
causing failed invalidations on real hardware.
- Two fixes for AMD IOMMU driver to fix a race condition and to add a
missing IOTLB flush when kernel is booted in kdump mode.
* tag 'iommu-fixes-v5.3-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/joro/iommu:
iommu/amd: Fix race in increase_address_space()
iommu/amd: Flush old domains in kdump kernel
iommu/vt-d: Remove global page flush support
Revert "iommu/vt-d: Avoid duplicated pci dma alias consideration"
Merge tag 'drm-fixes-2019-09-06' of git://anongit.freedesktop.org/drm/drm
Pull drm fixes from Dave Airlie:
"Live from my friend's couch in Barcelona, latest round of drm fixes.
The command line parser regression fixes look a bit larger because
they come with selftests included for the bugs they fix. Otherwise a
single nouveau, single ingenic and single vmwgfx fix:
* tag 'drm-fixes-2019-09-06' of git://anongit.freedesktop.org/drm/drm:
drm/vmwgfx: Fix double free in vmw_recv_msg()
drm/nouveau/sec2/gp102: add missing MODULE_FIRMWAREs
drm/selftests: modes: Add more unit tests for the cmdline parser
drm/modes: Introduce a whitelist for the named modes
drm/modes: Fix the command line parser to take force options into account
drm/modes: Add a switch to differentiate free standing options
drm/ingenic: Hardcode panel type to DPI
Merge tag 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mst/vhost
Pull virtio fixes from Michael Tsirkin:
"virtio, vhost, and balloon bugfixes.
A couple of last minute bugfixes. And a revert of a failed attempt at
metadata access optimization - we'll try again in the next cycle"
* tag 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mst/vhost:
mm/balloon_compaction: suppress allocation warnings
Revert "vhost: access vq metadata through kernel virtual address"
vhost: Remove unnecessary variable
virtio-net: lower min ring num_free for efficiency
vhost/test: fix build for vhost test
vhost/test: fix build for vhost test
Merge tag 'powerpc-5.3-5' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux
Pull powerpc fixes from Michael Ellerman:
"One fix for a boot hang on some Freescale machines when PREEMPT is
enabled.
Two CVE fixes for bugs in our handling of FP registers and
transactional memory, both of which can result in corrupted FP state,
or FP state leaking between processes.
Thanks to: Chris Packham, Christophe Leroy, Gustavo Romero, Michael
Neuling"
* tag 'powerpc-5.3-5' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux:
powerpc/tm: Fix restoring FP/VMX facility incorrectly on interrupts
powerpc/tm: Fix FP/VMX unavailable exceptions inside a transaction
powerpc/64e: Drop stale call to smp_processor_id() which hangs SMP startup
Lee Jones [Thu, 5 Sep 2019 08:25:55 +0000 (09:25 +0100)]
soc: qcom: geni: Provide parameter error checking
When booting with ACPI, the Geni Serial Engine is not set as the I2C/SPI
parent and thus, the wrapper (parent device) is unassigned. This causes
the kernel to crash with a null dereference error.
Link: https://lore.kernel.org/r/20190905082555.15020-1-lee.jones@linaro.org Fixes: 3134c49ddf9d ("soc: qcom: geni: Add support for ACPI") Acked-by: Bjorn Andersson <bjorn.andersson@linaro.org> Reviewed-by: Stephen Boyd <sboyd@kernel.org> Signed-off-by: Lee Jones <lee.jones@linaro.org> Signed-off-by: Arnd Bergmann <arnd@arndb.de>
After the conversion to lock-less dma-api call the
increase_address_space() function can be called without any
locking. Multiple CPUs could potentially race for increasing
the address space, leading to invalid domain->mode settings
and invalid page-tables. This has been happening in the wild
under high IO load and memory pressure.
Fix the race by locking this operation. The function is
called infrequently so that this does not introduce
a performance regression in the dma-api path again.
Reported-by: Qian Cai <cai@lca.pw> Fixes: e7c3ba0036b9 ('iommu/amd: Make use of the generic IOVA allocator') Signed-off-by: Joerg Roedel <jroedel@suse.de>
Stuart Hayes [Thu, 5 Sep 2019 17:09:48 +0000 (12:09 -0500)]
iommu/amd: Flush old domains in kdump kernel
When devices are attached to the amd_iommu in a kdump kernel, the old device
table entries (DTEs), which were copied from the crashed kernel, will be
overwritten with a new domain number. When the new DTE is written, the IOMMU
is told to flush the DTE from its internal cache--but it is not told to flush
the translation cache entries for the old domain number.
Without this patch, AMD systems using the tg3 network driver fail when kdump
tries to save the vmcore to a network system, showing network timeouts and
(sometimes) IOMMU errors in the kernel log.
This patch will flush IOMMU translation cache entries for the old domain when
a DTE gets overwritten with a new domain number.
Signed-off-by: Stuart Hayes <stuart.w.hayes@gmail.com> Fixes: 0320f9a34bc9 ('iommu/amd: Copy old trans table from old kernel') Signed-off-by: Joerg Roedel <jroedel@suse.de>
keys: Fix missing null pointer check in request_key_auth_describe()
If a request_key authentication token key gets revoked, there's a window in
which request_key_auth_describe() can see it with a NULL payload - but it
makes no check for this and something like the following oops may occur:
Fix this by checking for a NULL pointer when describing such a key.
Also make the read routine check for a NULL pointer to be on the safe side.
[DH: Modified to not take already-held rcu lock and modified to also check
in the read routine]
Fixes: 1832c4ca33e8 ("[PATCH] Keys: Fix race between two instantiators of a key") Reported-by: Sachin Sant <sachinp@linux.vnet.ibm.com> Signed-off-by: Hillf Danton <hdanton@sina.com> Signed-off-by: David Howells <dhowells@redhat.com> Tested-by: Sachin Sant <sachinp@linux.vnet.ibm.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Merge tag 'sound-5.3-rc8' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound
Pull sound fixes from Takashi Iwai:
"A collection of small HD-audio fixes:
- A regression fix for Realtek codecs due to the recent
initialization procedure change
- A fix for potential endless loop at the quirk table lookup
- Quirks for Lenovo, ASUS and HP machines"
* tag 'sound-5.3-rc8' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound:
ALSA: hda/realtek - Fix the problem of two front mics on a ThinkCentre
ALSA: hda/realtek - Enable internal speaker & headset mic of ASUS UX431FL
ALSA: hda/realtek - Add quirk for HP Pavilion 15
ALSA: hda/realtek - Fix overridden device-specific initialization
ALSA: hda - Fix potential endless loop at applying quirks
Merge branch 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull x86 fixes from Ingo Molnar:
"Misc fixes:
- EFI boot fix for signed kernels
- an AC flags fix related to UBSAN
- Hyper-V infinite loop fix"
* 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
x86/hyper-v: Fix overflow bug in fill_gva_list()
x86/uaccess: Don't leak the AC flags into __get_user() argument evaluation
x86/boot: Preserve boot_params.secure_boot from sanitizing
Merge branch 'sched-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull scheduler fixes from Ingo Molnar:
"This fixes an ABI bug introduced this cycle, plus fixes a throttling
bug"
* 'sched-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
sched/core: Fix uclamp ABI bug, clean up and robustify sched_read_attr() ABI logic and code
sched/fair: Don't assign runtime for throttled cfs_rq
Dan Carpenter [Thu, 15 Aug 2019 08:30:50 +0000 (11:30 +0300)]
drm/vmwgfx: Fix double free in vmw_recv_msg()
We recently added a kfree() after the end of the loop:
if (retries == RETRIES) {
kfree(reply);
return -EINVAL;
}
There are two problems. First the test is wrong and because retries
equals RETRIES if we succeed on the last iteration through the loop.
Second if we fail on the last iteration through the loop then the kfree
is a double free.
When you're reading this code, please note the break statement at the
end of the while loop. This patch changes the loop so that if it's not
successful then "reply" is NULL and we can test for that afterward.
Cc: <stable@vger.kernel.org> Fixes: 06d283121dac ("drm/vmwgfx: fix memory leak when too many retries have occurred") Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com> Reviewed-by: Thomas Hellstrom <thellstrom@vmware.com> Signed-off-by: Thomas Hellstrom <thellstrom@vmware.com>
iommu/ipmmu-vmsa: Disable cache snoop transactions on R-Car Gen3
According to the Hardware Manual Errata for Rev. 1.50 of April 10, 2019,
cache snoop transactions for page table walk requests are not supported
on R-Car Gen3.
Hence, this patch removes setting these fields in the IMTTBCR register,
since it will have no effect, and adds comments to the register bit
definitions, to make it clear they apply to R-Car Gen2 only.
iommu/ipmmu-vmsa: Move IMTTBCR_SL0_TWOBIT_* to restore sort order
Move the recently added IMTTBCR_SL0_TWOBIT_* definitions up, to make
sure all IMTTBCR register bit definitions are sorted by decreasing bit
index. Add comments to make it clear that they exist on R-Car Gen3
only.
Fixes: e9cf83b11ce055d1 ("iommu/ipmmu-vmsa: Allow two bit SL0") Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be> Reviewed-by: Simon Horman <horms+renesas@verge.net.au> Signed-off-by: Joerg Roedel <jroedel@suse.de>
Al Viro [Sat, 31 Aug 2019 07:43:43 +0000 (09:43 +0200)]
configfs: provide exclusion between IO and removals
Make sure that attribute methods are not called after the item
has been removed from the tree. To do so, we
* at the point of no return in removals, grab ->frag_sem
exclusive and mark the fragment dead.
* call the methods of attributes with ->frag_sem taken
shared and only after having verified that the fragment is still
alive.
The main benefit is for method instances - they are
guaranteed that the objects they are accessing *and* all ancestors
are still there. Another win is that we don't need to bother
with extra refcount on config_item when opening a file -
the item will be alive for as long as it stays in the tree, and
we won't touch it/attributes/any associated data after it's
been removed from the tree.
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by: Christoph Hellwig <hch@lst.de>
sched/core: Fix uclamp ABI bug, clean up and robustify sched_read_attr() ABI logic and code
Thadeu Lima de Souza Cascardo reported that 'chrt' broke on recent kernels:
$ chrt -p $$
chrt: failed to get pid 26306's policy: Argument list too long
and he has root-caused the bug to the following commit increasing sched_attr
size and breaking sched_read_attr() into returning -EFBIG:
0e2e7a287d68 ("sched/uclamp: Extend sched_setattr() to support utilization clamping")
The other, bigger bug is that the whole sched_getattr() and sched_read_attr()
logic of checking non-zero bits in new ABI components is arguably broken,
and pretty much any extension of the ABI will spuriously break the ABI.
That's way too fragile.
Instead implement the perf syscall's extensible ABI instead, which we
already implement on the sched_setattr() side:
- if user-attributes have the same size as kernel attributes then the
logic is unchanged.
- if user-attributes are larger than the kernel knows about then simply
skip the extra bits, but set attr->size to the (smaller) kernel size
so that tooling can (in principle) handle older kernel as well.
- if user-attributes are smaller than the kernel knows about then just
copy whatever user-space can accept.
Also clean up the whole logic:
- Simplify the code flow - there's no need for 'ret' for example.
- Standardize on 'kattr/uattr' and 'ksize/usize' naming to make sure we
always know which side we are dealing with.
- Why is it called 'read' when what it does is to copy to user? This
code is so far away from VFS read() semantics that the naming is
actively confusing. Name it sched_attr_copy_to_user() instead, which
mirrors other copy_to_user() functionality.
- Move the attr->size assignment from the head of sched_getattr() to the
sched_attr_copy_to_user() function. Nothing else within the kernel
should care about the size of the structure.
With these fixes the sched_getattr() syscall now nicely supports an
extensible ABI in both a forward and backward compatible fashion, and
will also fix the chrt bug.
As an added bonus the bogus -EFBIG return is removed as well, which as
Thadeu noted should have been -E2BIG to begin with.
Reported-by: Thadeu Lima de Souza Cascardo <cascardo@canonical.com> Tested-by: Dietmar Eggemann <dietmar.eggemann@arm.com> Tested-by: Thadeu Lima de Souza Cascardo <cascardo@canonical.com> Acked-by: Thadeu Lima de Souza Cascardo <cascardo@canonical.com> Cc: Arnaldo Carvalho de Melo <acme@infradead.org> Cc: Jiri Olsa <jolsa@redhat.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Patrick Bellasi <patrick.bellasi@arm.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Fixes: 0e2e7a287d68 ("sched/uclamp: Extend sched_setattr() to support utilization clamping") Link: https://lkml.kernel.org/r/20190904075532.GA26751@gmail.com Signed-off-by: Ingo Molnar <mingo@kernel.org>
Merge tag 'renesas-fixes-for-v5.3' of git://git.kernel.org/pub/scm/linux/kernel/git/horms/renesas into arm/fixes
Renesas ARM Based SoC Fixes for v5.3
* R-Car D3 (r8a77995) based Draak Board
- Correct backlight regulator name in device tree
* tag 'renesas-fixes-for-v5.3' of git://git.kernel.org/pub/scm/linux/kernel/git/horms/renesas:
arm64: dts: renesas: r8a77995: draak: Fix backlight regulator name
powerpc/tm: Fix restoring FP/VMX facility incorrectly on interrupts
When in userspace and MSR FP=0 the hardware FP state is unrelated to
the current process. This is extended for transactions where if tbegin
is run with FP=0, the hardware checkpoint FP state will also be
unrelated to the current process. Due to this, we need to ensure this
hardware checkpoint is updated with the correct state before we enable
FP for this process.
Unfortunately we get this wrong when returning to a process from a
hardware interrupt. A process that starts a transaction with FP=0 can
take an interrupt. When the kernel returns back to that process, we
change to FP=1 but with hardware checkpoint FP state not updated. If
this transaction is then rolled back, the FP registers now contain the
wrong state.
The process looks like this:
Userspace: Kernel
Start userspace
with MSR FP=0 TM=1
< -----
...
tbegin
bne
Hardware interrupt
---- >
<do_IRQ...>
....
ret_from_except
restore_math()
/* sees FP=0 */
restore_fp()
tm_active_with_fp()
/* sees FP=1 (Incorrect) */
load_fp_state()
FP = 0 -> 1
< -----
Return to userspace
with MSR TM=1 FP=1
with junk in the FP TM checkpoint
TM rollback
reads FP junk
When returning from the hardware exception, tm_active_with_fp() is
incorrectly making restore_fp() call load_fp_state() which is setting
FP=1.
The fix is to remove tm_active_with_fp().
tm_active_with_fp() is attempting to handle the case where FP state
has been changed inside a transaction. In this case the checkpointed
and transactional FP state is different and hence we must restore the
FP state (ie. we can't do lazy FP restore inside a transaction that's
used FP). It's safe to remove tm_active_with_fp() as this case is
handled by restore_tm_state(). restore_tm_state() detects if FP has
been using inside a transaction and will set load_fp and call
restore_math() to ensure the FP state (checkpoint and transaction) is
restored.
This is a data integrity problem for the current process as the FP
registers are corrupted. It's also a security problem as the FP
registers from one process may be leaked to another.
Similarly for VMX.
A simple testcase to replicate this will be posted to
tools/testing/selftests/powerpc/tm/tm-poison.c
This fixes CVE-2019-15031.
Fixes: 4391b577289c ("powerpc: Don't enable FP/Altivec if not checkpointed") Cc: stable@vger.kernel.org # 4.15+ Signed-off-by: Gustavo Romero <gromero@linux.ibm.com> Signed-off-by: Michael Neuling <mikey@neuling.org> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://lore.kernel.org/r/20190904045529.23002-2-gromero@linux.vnet.ibm.com
powerpc/tm: Fix FP/VMX unavailable exceptions inside a transaction
When we take an FP unavailable exception in a transaction we have to
account for the hardware FP TM checkpointed registers being
incorrect. In this case for this process we know the current and
checkpointed FP registers must be the same (since FP wasn't used
inside the transaction) hence in the thread_struct we copy the current
FP registers to the checkpointed ones.
This copy is done in tm_reclaim_thread(). We use thread->ckpt_regs.msr
to determine if FP was on when in userspace. thread->ckpt_regs.msr
represents the state of the MSR when exiting userspace. This is setup
by check_if_tm_restore_required().
Unfortunatley there is an optimisation in giveup_all() which returns
early if tsk->thread.regs->msr (via local variable `usermsr`) has
FP=VEC=VSX=SPE=0. This optimisation means that
check_if_tm_restore_required() is not called and hence
thread->ckpt_regs.msr is not updated and will contain an old value.
This can happen if due to load_fp=255 we start a userspace process
with MSR FP=1 and then we are context switched out. In this case
thread->ckpt_regs.msr will contain FP=1. If that same process is then
context switched in and load_fp overflows, MSR will have FP=0. If that
process now enters a transaction and does an FP instruction, the FP
unavailable will not update thread->ckpt_regs.msr (the bug) and MSR
FP=1 will be retained in thread->ckpt_regs.msr. tm_reclaim_thread()
will then not perform the required memcpy and the checkpointed FP regs
in the thread struct will contain the wrong values.
The code path for this happening is:
Userspace: Kernel
Start userspace
with MSR FP/VEC/VSX/SPE=0 TM=1
< -----
...
tbegin
bne
fp instruction
FP unavailable
---- >
fp_unavailable_tm()
tm_reclaim_current()
tm_reclaim_thread()
giveup_all()
return early since FP/VMX/VSX=0
/* ckpt MSR not updated (Incorrect) */
tm_reclaim()
/* thread_struct ckpt FP regs contain junk (OK) */
/* Sees ckpt MSR FP=1 (Incorrect) */
no memcpy() performed
/* thread_struct ckpt FP regs not fixed (Incorrect) */
tm_recheckpoint()
/* Put junk in hardware checkpoint FP regs */
....
< -----
Return to userspace
with MSR TM=1 FP=1
with junk in the FP TM checkpoint
TM rollback
reads FP junk
This is a data integrity problem for the current process as the FP
registers are corrupted. It's also a security problem as the FP
registers from one process may be leaked to another.
This patch moves up check_if_tm_restore_required() in giveup_all() to
ensure thread->ckpt_regs.msr is updated correctly.
A simple testcase to replicate this will be posted to
tools/testing/selftests/powerpc/tm/tm-poison.c
Similarly for VMX.
This fixes CVE-2019-15030.
Fixes: a5f1e55d9ba7 ("powerpc/tm: Fix FP and VMX register corruption") Cc: stable@vger.kernel.org # 4.12+ Signed-off-by: Gustavo Romero <gromero@linux.vnet.ibm.com> Signed-off-by: Michael Neuling <mikey@neuling.org> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://lore.kernel.org/r/20190904045529.23002-1-gromero@linux.vnet.ibm.com
There is no reason to print warnings when balloon page allocation fails,
as they are expected and can be handled gracefully. Since VMware
balloon now uses balloon-compaction infrastructure, and suppressed these
warnings before, it is also beneficial to suppress these warnings to
keep the same behavior that the balloon had before.
Cc: Jason Wang <jasowang@redhat.com> Signed-off-by: Nadav Amit <namit@vmware.com> Signed-off-by: Michael S. Tsirkin <mst@redhat.com> Reviewed-by: David Hildenbrand <david@redhat.com>
Revert "vhost: access vq metadata through kernel virtual address"
This reverts commit d35bf66a42 ("vhost: access vq metadata through
kernel virtual address"). The commit caused a bunch of issues, and
while commit b19f5f8432 ("vhost: disable metadata prefetch
optimization") disabled the optimization it's not nice to keep lots of
dead code around.
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
? jiang [Tue, 20 Aug 2019 02:51:23 +0000 (02:51 +0000)]
virtio-net: lower min ring num_free for efficiency
This change lowers ring buffer reclaim threshold from 1/2*queue to budget
for better performance. According to our test with qemu + dpdk, packet
dropping happens when the guest is not able to provide free buffer in
avail ring timely with default 1/2*queue. The value in the patch has been
tested and does show better performance.
Test setup: iperf3 to generate packets to guest (total 30mins, pps 400k, UDP)
avg packets drop before: 2842
avg packets drop after: 360(-87.3%)
Further, current code suffers from a starvation problem: the amount of
work done by try_fill_recv is not bounded by the budget parameter, thus
(with large queues) once in a while userspace gets blocked for a long
time while queue is being refilled. Trigger refills earlier to make sure
the amount of work to do is limited.
Signed-off-by: jiangkidd <jiangkidd@hotmail.com> Acked-by: Jason Wang <jasowang@redhat.com> Acked-by: Michael S. Tsirkin <mst@redhat.com> Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Tiwei Bie [Wed, 28 Aug 2019 05:37:00 +0000 (13:37 +0800)]
vhost/test: fix build for vhost test
Since vhost_exceeds_weight() was introduced, callers need to specify
the packet weight and byte weight in vhost_dev_init(). Note that, the
packet weight isn't counted in this patch to keep the original behavior
unchanged.
Fixes: df777a907b1b ("vhost: introduce vhost_exceeds_weight()") Cc: stable@vger.kernel.org Signed-off-by: Tiwei Bie <tiwei.bie@intel.com> Signed-off-by: Michael S. Tsirkin <mst@redhat.com> Acked-by: Jason Wang <jasowang@redhat.com>
Tiwei Bie [Wed, 28 Aug 2019 05:36:59 +0000 (13:36 +0800)]
vhost/test: fix build for vhost test
Since below commit, callers need to specify the iov_limit in
vhost_dev_init() explicitly.
Fixes: 5e303d5e1b1e ("vhost: fix OOB in get_rx_bufs()") Cc: stable@vger.kernel.org Signed-off-by: Tiwei Bie <tiwei.bie@intel.com> Signed-off-by: Michael S. Tsirkin <mst@redhat.com> Acked-by: Jason Wang <jasowang@redhat.com>
Hui Wang [Wed, 4 Sep 2019 05:53:27 +0000 (13:53 +0800)]
ALSA: hda/realtek - Fix the problem of two front mics on a ThinkCentre
This ThinkCentre machine has a new realtek codec alc222, it is not
in the support list, we add it in the realtek.c then this machine
can apply FIXUPs for the realtek codec.
And this machine has two front mics which can't be handled
by PA so far, it uses the pin 0x18 and 0x19 as the front mics, as
a result the existing FIXUP ALC294_FIXUP_LENOVO_MIC_LOCATION doesn't
work on this machine. Fortunately another FIXUP
ALC283_FIXUP_HEADSET_MIC also can change the location for one of the
two mics on this machine.
dmaengine: rcar-dmac: Fix DMACHCLR handling if iommu is mapped
The commit 3f4be8df3261 ("dmaengine: rcar-dmac: clear pertinence
number of channels") forgets to clear the last channel by
DMACHCLR in rcar_dmac_init() (and doesn't need to clear the first
channel) if iommu is mapped to the device. So, this patch fixes it
by using "channels_mask" bitfield.
Note that the hardware and driver don't support more than 32 bits
in DMACHCLR register anyway, so this patch should reject more than
32 channels in rcar_dmac_parse_of().
Fixes: 3f4be8df32615abb ("dmaengine: rcar-dmac: clear pertinence number of channels") Signed-off-by: Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com> Reviewed-by: Simon Horman <horms+renesas@verge.net.au> Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be> Link: https://lore.kernel.org/r/1567424643-26629-1-git-send-email-yoshihiro.shimoda.uh@renesas.com Signed-off-by: Vinod Koul <vkoul@kernel.org>
Baolin Wang [Fri, 30 Aug 2019 07:37:45 +0000 (15:37 +0800)]
dmaengine: sprd: Fix the DMA link-list configuration
For the Spreadtrum DMA link-list mode, when the DMA engine got a slave
hardware request, which will trigger the DMA engine to load the DMA
configuration from the link-list memory automatically. But before the
slave hardware request, the slave will get an incorrect residue due
to the first node used to trigger the link-list was configured as the
last source address and destination address.
Thus we should make sure the first node was configured the start source
address and destination address, which can fix this issue.
Jan Kaisrlik [Tue, 20 Aug 2019 11:42:29 +0000 (13:42 +0200)]
Revert "mmc: core: do not retry CMD6 in __mmc_switch()"
Turns out the commit 112f3c1310f2 ("mmc: core: do not retry CMD6 in
__mmc_switch()") breaks initialization of a Toshiba THGBMNG5 eMMC card,
when using the meson-gx-mmc.c driver on a custom board based on Amlogic
A113D.
The CMD6 that switches the card into HS200 mode is then one that fails and
according to the below printed messages from the log:
After some analyze, it turns out that adding a delay of ~5ms inside
mmc_select_bus_width() but after mmc_compare_ext_csds() has been executed,
also fixes the problem. Adding yet some more debug code, trying to figure
out if potentially the card could be in a busy state, both by using CMD13
and ->card_busy() ops concluded that this was not the case.
Therefore, let's simply revert the commit that dropped support for retrying
of CMD6, as this also fixes the problem.
Fixes: 112f3c1310f2 ("mmc: core: do not retry CMD6 in __mmc_switch()") Cc: stable@vger.kernel.org Signed-off-by: Jan Kaisrlik <ja.kaisrlik@gmail.com> Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Switch to the generic function mem_encrypt_active() because
sme_active() is x86 specific and can't be called from
generic code on other platforms than x86.
Fixes: 6bf967ce47d4 ("iommu: Disable passthrough mode when SME is active") Signed-off-by: Joerg Roedel <jroedel@suse.de>
Jacob Pan [Mon, 26 Aug 2019 15:53:29 +0000 (08:53 -0700)]
iommu/vt-d: Remove global page flush support
Global pages support is removed from VT-d spec 3.0. Since global pages G
flag only affects first-level paging structures and because DMA request
with PASID are only supported by VT-d spec. 3.0 and onward, we can
safely remove global pages support.
For kernel shared virtual address IOTLB invalidation, PASID
granularity and page selective within PASID will be used. There is
no global granularity supported. Without this fix, IOTLB invalidation
will cause invalid descriptor error in the queued invalidation (QI)
interface.
Fixes: c876f2ac37d4 ("iommu/vt-d: Shared virtual address in scalable mode") Reported-by: Sanjay K Kumar <sanjay.k.kumar@intel.com> Signed-off-by: Jacob Pan <jacob.jun.pan@linux.intel.com> Signed-off-by: Joerg Roedel <jroedel@suse.de>
iommu/arm-smmu-v3: Fix build error without CONFIG_PCI_ATS
If CONFIG_PCI_ATS is not set, building fails:
drivers/iommu/arm-smmu-v3.c: In function arm_smmu_ats_supported:
drivers/iommu/arm-smmu-v3.c:2325:35: error: struct pci_dev has no member named ats_cap; did you mean msi_cap?
return !pdev->untrusted && pdev->ats_cap;
^~~~~~~
ats_cap should only used when CONFIG_PCI_ATS is defined,
so use #ifdef block to guard this.
Fixes: add54b2dfcca ("iommu/arm-smmu-v3: Rework enabling/disabling of ATS for PCI masters") Signed-off-by: YueHaibing <yuehaibing@huawei.com> Signed-off-by: Joerg Roedel <jroedel@suse.de>
Liangyan [Mon, 26 Aug 2019 12:16:33 +0000 (20:16 +0800)]
sched/fair: Don't assign runtime for throttled cfs_rq
do_sched_cfs_period_timer() will refill cfs_b runtime and call
distribute_cfs_runtime to unthrottle cfs_rq, sometimes cfs_b->runtime
will allocate all quota to one cfs_rq incorrectly, then other cfs_rqs
attached to this cfs_b can't get runtime and will be throttled.
We find that one throttled cfs_rq has non-negative
cfs_rq->runtime_remaining and cause an unexpetced cast from s64 to u64
in snippet:
The runtime here will change to a large number and consume all
cfs_b->runtime in this cfs_b period.
According to Ben Segall, the throttled cfs_rq can have
account_cfs_rq_runtime called on it because it is throttled before
idle_balance, and the idle_balance calls update_rq_clock to add time
that is accounted to the task.
This commit prevents cfs_rq to be assgined new runtime if it has been
throttled until that distribute_cfs_runtime is called.
Signed-off-by: Liangyan <liangyan.peng@linux.alibaba.com> Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Reviewed-by: Valentin Schneider <valentin.schneider@arm.com> Reviewed-by: Ben Segall <bsegall@google.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: shanpeic@linux.alibaba.com Cc: stable@vger.kernel.org Cc: xlpang@linux.alibaba.com Fixes: ad400f2c4288 ("sched: Throttle entities exceeding their allowed bandwidth") Link: https://lkml.kernel.org/r/20190826121633.6538-1-liangyan.peng@linux.alibaba.com Signed-off-by: Ingo Molnar <mingo@kernel.org>
1. Has duplicated internal speakers (0x14 & 0x17) which makes the output
route become confused. So, the output volume cannot be changed by
setting.
2. Misses the headset mic pin node.
This patch disables the confusing speaker (NID 0x14) and enables the
headset mic (NID 0x19).
Al Viro [Sun, 25 Aug 2019 23:56:13 +0000 (19:56 -0400)]
configfs: new object reprsenting tree fragments
Refcounted, hangs of configfs_dirent, created by operations that add
fragments to configfs tree (mkdir and configfs_register_{subsystem,group}).
Will be used in the next commit to provide exclusion between fragment
removal and ->show/->store calls.
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by: Christoph Hellwig <hch@lst.de>
Al Viro [Fri, 30 Aug 2019 03:13:30 +0000 (23:13 -0400)]
configfs_register_group() shouldn't be (and isn't) called in rmdirable parts
revert 90c76c3c306a "configfs: fix registered group removal"
It was an attempt to handle something that fundamentally doesn't
work - configfs_register_group() should never be done in a part
of tree that can be rmdir'ed. And in mainline it never had been,
so let's not borrow trouble; the fix was racy anyway, it would take
a lot more to make that work and desired semantics is not clear.
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by: Christoph Hellwig <hch@lst.de>
Tianyu Lan [Mon, 2 Sep 2019 12:41:43 +0000 (20:41 +0800)]
x86/hyper-v: Fix overflow bug in fill_gva_list()
When the 'start' parameter is >= 0xFF000000 on 32-bit
systems, or >= 0xFFFFFFFF'FF000000 on 64-bit systems,
fill_gva_list() gets into an infinite loop.
With such inputs, 'cur' overflows after adding HV_TLB_FLUSH_UNIT
and always compares as less than end. Memory is filled with
guest virtual addresses until the system crashes.
Fix this by never incrementing 'cur' to be larger than 'end'.
Reported-by: Jong Hyun Park <park.jonghyun@yonsei.ac.kr> Signed-off-by: Tianyu Lan <Tianyu.Lan@microsoft.com> Reviewed-by: Michael Kelley <mikelley@microsoft.com> Cc: Borislav Petkov <bp@alien8.de> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Fixes: 2989934b33b2 ("x86/hyper-v: Use hypercall for remote TLB flush") Signed-off-by: Ingo Molnar <mingo@kernel.org>
Trond Myklebust [Wed, 28 Aug 2019 15:26:13 +0000 (11:26 -0400)]
NFS: Fix inode fileid checks in attribute revalidation code
We want to throw out the attrbute if it refers to the mounted on fileid,
and not the real fileid. However we do not want to block cache consistency
updates from NFSv4 writes.
Merge tag 'char-misc-5.3-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc
Pull char/misc driver fixes from Greg KH:
"Here are some small char and misc driver fixes for reported issues for
5.3-rc7
Also included in here is the documentation for how we are handling
hardware issues under embargo that everyone has finally agreed on, as
well as a MAINTAINERS update for the suckers who agreed to handle the
LICENSES/ files.
All of these have been in linux-next last week with no reported
issues"
* tag 'char-misc-5.3-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc:
fsi: scom: Don't abort operations for minor errors
vmw_balloon: Fix offline page marking with compaction
VMCI: Release resource if the work is already queued
Documentation/process: Embargoed hardware security issues
lkdtm/bugs: fix build error in lkdtm_EXHAUST_STACK
mei: me: add Tiger Lake point LP device ID
intel_th: pci: Add Tiger Lake support
intel_th: pci: Add support for another Lewisburg PCH
stm class: Fix a double free of stm_source_device
MAINTAINERS: add entry for LICENSES and SPDX stuff
fpga: altera-ps-spi: Fix getting of optional confd gpio
Merge tag 'usb-5.3-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb
Pull USB fixes from Greg KH:
"Here are some small USB fixes that have been in linux-next this past
week for 5.3-rc7
They fix the usual xhci, syzbot reports, and other small issues that
have come up last week.
All have been in linux-next with no reported issues"
* tag 'usb-5.3-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb:
USB: cdc-wdm: fix race between write and disconnect due to flag abuse
usb: host: xhci: rcar: Fix typo in compatible string matching
usb: host: xhci-tegra: Set DMA mask correctly
USB: storage: ums-realtek: Whitelist auto-delink support
USB: storage: ums-realtek: Update module parameter description for auto_delink_en
usb: host: ohci: fix a race condition between shutdown and irq
usb: hcd: use managed device resources
typec: tcpm: fix a typo in the comparison of pdo_max_voltage
usb-storage: Add new JMS567 revision to unusual_devs
usb: chipidea: udc: don't do hardware access if gadget has stopped
usbtmc: more sanity checking for packet size
usb: udc: lpc32xx: silence fall-through warning
Peter Zijlstra [Thu, 29 Aug 2019 08:24:45 +0000 (10:24 +0200)]
x86/uaccess: Don't leak the AC flags into __get_user() argument evaluation
Identical to __put_user(); the __get_user() argument evalution will too
leak UBSAN crud into the __uaccess_begin() / __uaccess_end() region.
While uncommon this was observed to happen for:
drivers/xen/gntdev.c: if (__get_user(old_status, batch->status[i]))
where UBSAN added array bound checking.
This complements commit:
432f58820a53 ("x86/uaccess: Dont leak the AC flag into __put_user() argument evaluation")
Tested-by Sedat Dilek <sedat.dilek@gmail.com> Reported-by: Randy Dunlap <rdunlap@infradead.org> Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Reviewed-by: Josh Poimboeuf <jpoimboe@redhat.com> Reviewed-by: Thomas Gleixner <tglx@linutronix.de> Cc: broonie@kernel.org Cc: sfr@canb.auug.org.au Cc: akpm@linux-foundation.org Cc: Randy Dunlap <rdunlap@infradead.org> Cc: mhocko@suse.cz Cc: Josh Poimboeuf <jpoimboe@redhat.com> Link: https://lkml.kernel.org/r/20190829082445.GM2369@hirez.programming.kicks-ass.net
John S. Gruber [Sun, 1 Sep 2019 22:00:54 +0000 (00:00 +0200)]
x86/boot: Preserve boot_params.secure_boot from sanitizing
Commit
b30b6ebc5ec4 ("x86/boot: Save fields explicitly, zero out everything else")
now zeroes the secure boot setting information (enabled/disabled/...)
passed by the boot loader or by the kernel's EFI handover mechanism.
The problem manifests itself with signed kernels using the EFI handoff
protocol with grub and the kernel loses the information whether secure
boot is enabled in the firmware, i.e., the log message "Secure boot
enabled" becomes "Secure boot could not be determined".
efi_main() arch/x86/boot/compressed/eboot.c sets this field early but it
is subsequently zeroed by the above referenced commit.
Include boot_params.secure_boot in the preserve field list.
[ bp: restructure commit message and massage. ]
Fixes: b30b6ebc5ec4 ("x86/boot: Save fields explicitly, zero out everything else") Signed-off-by: John S. Gruber <JohnSGruber@gmail.com> Signed-off-by: Borislav Petkov <bp@suse.de> Reviewed-by: John Hubbard <jhubbard@nvidia.com> Cc: "H. Peter Anvin" <hpa@zytor.com> Cc: Ingo Molnar <mingo@redhat.com> Cc: Juergen Gross <jgross@suse.com> Cc: Mark Brown <broonie@kernel.org> Cc: stable <stable@vger.kernel.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: x86-ml <x86@kernel.org> Link: https://lkml.kernel.org/r/CAPotdmSPExAuQcy9iAHqX3js_fc4mMLQOTr5RBGvizyCOPcTQQ@mail.gmail.com
1) Fix some length checks during OGM processing in batman-adv, from
Sven Eckelmann.
2) Fix regression that caused netfilter conntrack sysctls to not be
per-netns any more. From Florian Westphal.
3) Use after free in netpoll, from Feng Sun.
4) Guard destruction of pfifo_fast per-cpu qdisc stats with
qdisc_is_percpu_stats(), from Davide Caratti. Similar bug is fixed
in pfifo_fast_enqueue().
5) Fix memory leak in mld_del_delrec(), from Eric Dumazet.
6) Handle neigh events on internal ports correctly in nfp, from John
Hurley.
7) Clear SKB timestamp in NF flow table code so that it does not
confuse fq scheduler. From Florian Westphal.
8) taprio destroy can crash if it is invoked in a failure path of
taprio_init(), because the list head isn't setup properly yet and
the list del is unconditional. Perform the list add earlier to
address this. From Vladimir Oltean.
9) Make sure to reapply vlan filters on device up, in aquantia driver.
From Dmitry Bogdanov.
10) sgiseeq driver releases DMA memory using free_page() instead of
dma_free_attrs(). From Christophe JAILLET.
* git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net: (58 commits)
net: seeq: Fix the function used to release some memory in an error handling path
enetc: Add missing call to 'pci_free_irq_vectors()' in probe and remove functions
net: bcmgenet: use ethtool_op_get_ts_info()
tc-testing: don't hardcode 'ip' in nsPlugin.py
net: dsa: microchip: add KSZ8563 compatibility string
dt-bindings: net: dsa: document additional Microchip KSZ8563 switch
net: aquantia: fix out of memory condition on rx side
net: aquantia: linkstate irq should be oneshot
net: aquantia: reapply vlan filters on up
net: aquantia: fix limit of vlan filters
net: aquantia: fix removal of vlan 0
net/sched: cbs: Set default link speed to 10 Mbps in cbs_set_port_rate
taprio: Set default link speed to 10 Mbps in taprio_set_picos_per_byte
taprio: Fix kernel panic in taprio_destroy
net: dsa: microchip: fill regmap_config name
rxrpc: Fix lack of conn cleanup when local endpoint is cleaned up [ver #2]
net: stmmac: dwmac-rk: Don't fail if phy regulator is absent
amd-xgbe: Fix error path in xgbe_mod_init()
netfilter: nft_meta_bridge: Fix get NFT_META_BRI_IIFVPROTO in network byteorder
mac80211: Correctly set noencrypt for PAE frames
...
net: seeq: Fix the function used to release some memory in an error handling path
In commit 47330dd6483f ("sgiseeq: replace use of dma_cache_wback_inv"),
a call to 'get_zeroed_page()' has been turned into a call to
'dma_alloc_coherent()'. Only the remove function has been updated to turn
the corresponding 'free_page()' into 'dma_free_attrs()'.
The error hndling path of the probe function has not been updated.
Fix it now.
Rename the corresponding label to something more in line.
Fixes: 47330dd6483f ("sgiseeq: replace use of dma_cache_wback_inv") Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr> Reviewed-by: Thomas Bogendoerfer <tbogendoerfer@suse.de> Signed-off-by: David S. Miller <davem@davemloft.net>
Merge branch 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull x86 fixes from Thomas Gleixner:
"A set of fixes for x86:
- Fix the bogus detection of 32bit user mode for uretprobes which
caused corruption of the user return address resulting in
application crashes. In the uprobes handler in_ia32_syscall() is
obviously always returning false on a 64bit kernel. Use
user_64bit_mode() instead which works correctly.
- Prevent large page splitting when ftrace flips RW/RO on the kernel
text which caused iTLB performance issues. Ftrace wants to be
converted to text_poke() which avoids the problem, but for now
allow large page preservation in the static protections check when
the change request spawns a full large page.
- Prevent arch_dynirq_lower_bound() from returning 0 when the IOAPIC
is configured via device tree. In the device tree case the GSI 1:1
mapping is meaningless therefore the lower bound which protects the
GSI range on ACPI machines is irrelevant. Return the lower bound
which the core hands to the function instead of blindly returning 0
which causes the core to allocate the invalid virtual interupt
number 0 which in turn prevents all drivers from allocating and
requesting an interrupt.
- Remove the bogus initialization of LDR and DFR in the 32bit bigsmp
APIC driver. That uses physical destination mode where LDR/DFR are
ignored, but the initialization and the missing clear of LDR caused
the APIC to be left in a inconsistent state on kexec/reboot.
- Clear LDR when clearing the APIC registers so the APIC is in a well
defined state.
- Initialize variables proper in the find_trampoline_placement()
code.
- Silence GCC( build warning for the real mode part of the build"
* 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
x86/mm/cpa: Prevent large page split when ftrace flips RW on kernel text
x86/build: Add -Wnoaddress-of-packed-member to REALMODE_CFLAGS, to silence GCC9 build warning
x86/boot/compressed/64: Fix missing initialization in find_trampoline_placement()
x86/apic: Include the LDR when clearing out APIC registers
x86/apic: Do not initialize LDR and DFR for bigsmp
uprobes/x86: Fix detection of 32-bit user mode
x86/apic: Fix arch_dynirq_lower_bound() bug for DT enabled machines
Merge branch 'perf-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull perf fixes from Thomas Gleixner:
"Two fixes for perf x86 hardware implementations:
- Restrict the period on Nehalem machines to prevent perf from
hogging the CPU
- Prevent the AMD IBS driver from overwriting the hardwre controlled
and pre-seeded reserved bits (0-6) in the count register which
caused a sample bias for dispatched micro-ops"
* 'perf-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
perf/x86/amd/ibs: Fix sample bias for dispatched micro-ops
perf/x86/intel: Restrict period on Nehalem
Ryan M. Collins [Fri, 30 Aug 2019 18:49:55 +0000 (14:49 -0400)]
net: bcmgenet: use ethtool_op_get_ts_info()
This change enables the use of SW timestamping on the Raspberry Pi 4.
bcmgenet's transmit function bcmgenet_xmit() implements software
timestamping. However the SOF_TIMESTAMPING_TX_SOFTWARE capability was
missing and only SOF_TIMESTAMPING_RX_SOFTWARE was announced. By using
ethtool_ops bcmgenet_ethtool_ops() as get_ts_info(), the
SOF_TIMESTAMPING_TX_SOFTWARE capability is announced.
Similar to commit b75da18c58e6 ("smsc95xx: use ethtool_op_get_ts_info()")
Signed-off-by: Ryan M. Collins <rmc032@bucknell.edu> Acked-by: Florian Fainelli <f.fainelli@gmail.com> Acked-by: Doug Berger <opendmb@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Davide Caratti [Fri, 30 Aug 2019 16:51:47 +0000 (18:51 +0200)]
tc-testing: don't hardcode 'ip' in nsPlugin.py
the following tdc test fails on Fedora:
# ./tdc.py -e 2638
-- ns/SubPlugin.__init__
Test 2638: Add matchall and try to get it
-----> prepare stage *** Could not execute: "$TC qdisc add dev $DEV1 clsact"
-----> prepare stage *** Error message: "/bin/sh: ip: command not found"
returncode 127; expected [0]
-----> prepare stage *** Aborting test run.
Let nsPlugin.py use the 'IP' variable introduced with commit b8f14a9bc815
("tc-tests: added path to ip command in tdc"), so that the path to 'ip' is
correctly resolved to the value we have in tdc_config.py.
# ./tdc.py -e 2638
-- ns/SubPlugin.__init__
Test 2638: Add matchall and try to get it
All test results:
1..1
ok 1 2638 - Add matchall and try to get it
Fixes: f893bfa56fda ("tc-testing: Restore original behaviour for namespaces in tdc") Reported-by: Hangbin Liu <liuhangbin@gmail.com> Signed-off-by: Davide Caratti <dcaratti@redhat.com> Acked-by: Nicolas Dichtel <nicolas.dichtel@6wind.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Dmitry Bogdanov [Fri, 30 Aug 2019 12:08:38 +0000 (12:08 +0000)]
net: aquantia: fix out of memory condition on rx side
On embedded environments with hard memory limits it is a normal although
rare case when skb can't be allocated on rx part under high traffic.
In such OOM cases napi_complete_done() was not called.
So the napi object became in an invalid state like it is "scheduled".
Kernel do not re-schedules the poll of that napi object.
Consequently, kernel can not remove that object the system hangs on
`ifconfig down` waiting for a poll.
We are fixing this by gracefully closing napi poll routine with correct
invocation of napi_complete_done.
This was reproduced with artificially failing the allocation of skb to
simulate an "out of memory" error case and check that traffic does
not get stuck.
Fixes: 7d44f9f7bd40 ("net: ethernet: aquantia: Vector operations") Signed-off-by: Igor Russkikh <igor.russkikh@aquantia.com> Signed-off-by: Dmitry Bogdanov <dmitry.bogdanov@aquantia.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Igor Russkikh [Fri, 30 Aug 2019 12:08:36 +0000 (12:08 +0000)]
net: aquantia: linkstate irq should be oneshot
Declaring threaded irq handler should also indicate the irq is
oneshot. It is oneshot indeed, because HW implements irq automasking
on trigger.
Not declaring this causes some kernel configurations to fail
on interface up, because request_threaded_irq returned an err code.
The issue was originally hidden on normal x86_64 configuration with
latest kernel, because depending on interrupt controller, irq driver
added ONESHOT flag on its own.
Issue was observed on older kernels (4.14) where no such logic exists.
Fixes: 335d69472b53 ("net: aquantia: link status irq handling") Signed-off-by: Igor Russkikh <igor.russkikh@aquantia.com> Reported-by: Michael Symolkin <Michael.Symolkin@aquantia.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Dmitry Bogdanov [Fri, 30 Aug 2019 12:08:35 +0000 (12:08 +0000)]
net: aquantia: reapply vlan filters on up
In case of device reconfiguration the driver may reset the device invisible
for other modules, vlan module in particular. So vlans will not be
removed&created and vlan filters will not be configured in the device.
The patch reapplies the vlan filters at device start.
Fixes: 7f33a1ab29d28 ("net: aquantia: add support of rx-vlan-filter offload") Signed-off-by: Dmitry Bogdanov <dmitry.bogdanov@aquantia.com> Signed-off-by: Igor Russkikh <igor.russkikh@aquantia.com> Signed-off-by: David S. Miller <davem@davemloft.net>
projects / kernel.git / log