conversion of fsdax in the v4.20 kernel.
- Add a 'resource' (root-only physical base address) sysfs attribute to
device-dax instances to correlate memory-blocks onlined via the kmem
driver with a given device instance.
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Merge tag 'dax-for-5.3' of git://git.kernel.org/pub/scm/linux/kernel/git/nvdimm/nvdimm
Pull dax updates from Dan Williams:
"The fruits of a bug hunt in the fsdax implementation with Willy and a
small feature update for device-dax:
- Fix a hang condition that started triggering after the Xarray
conversion of fsdax in the v4.20 kernel.
- Add a 'resource' (root-only physical base address) sysfs attribute
to device-dax instances to correlate memory-blocks onlined via the
kmem driver with a given device instance"
* tag 'dax-for-5.3' of git://git.kernel.org/pub/scm/linux/kernel/git/nvdimm/nvdimm:
dax: Fix missed wakeup with PMD faults
device-dax: Add a 'resource' attribute
persistent memory device that allows a guest VM to use DAX mechanisms to
access a host-file with host-page-cache. It arranges for MAP_SYNC to
be disabled and instead triggers a host fsync() when a 'write-cache
flush' command is sent to the virtual disk device.
- Miscellaneous small fixups.
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Merge tag 'libnvdimm-for-5.3' of git://git.kernel.org/pub/scm/linux/kernel/git/nvdimm/nvdimm
Pull libnvdimm updates from Dan Williams:
"Primarily just the virtio_pmem driver:
- virtio_pmem
The new virtio_pmem facility introduces a paravirtualized
persistent memory device that allows a guest VM to use DAX
mechanisms to access a host-file with host-page-cache. It arranges
for MAP_SYNC to be disabled and instead triggers a host fsync()
when a 'write-cache flush' command is sent to the virtual disk
device.
- Miscellaneous small fixups"
* tag 'libnvdimm-for-5.3' of git://git.kernel.org/pub/scm/linux/kernel/git/nvdimm/nvdimm:
virtio_pmem: fix sparse warning
xfs: disable map_sync for async flush
ext4: disable map_sync for async flush
dax: check synchronous mapping is supported
dm: enable synchronous dax
libnvdimm: add dax_dev sync flag
virtio-pmem: Add virtio pmem driver
libnvdimm: nd_region flush callback support
libnvdimm, namespace: Drop uuid_t implementation detail
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Merge tag 'linux-watchdog-5.3-rc1' of git://www.linux-watchdog.org/linux-watchdog
Pull watchdog updates from Wim Van Sebroeck:
- add Allwinner H6 watchdog
- drop warning after registering device patches
- hpwdt improvements
- gpio: add support for nowayout option
- introduce CONFIG_WATCHDOG_OPEN_TIMEOUT
- convert remaining drivers to use SPDX license identifier
- Fixes and improvements on several watchdog device drivers
* tag 'linux-watchdog-5.3-rc1' of git://www.linux-watchdog.org/linux-watchdog: (74 commits)
watchdog: digicolor_wdt: Remove unused variable in dc_wdt_probe
watchdog: ie6xx_wdt: Use spinlock_t instead of struct spinlock
watchdog: atmel: atmel-sama5d4-wdt: Disable watchdog on system suspend
watchdog: convert remaining drivers to use SPDX license identifier
dt-bindings: watchdog: Rename bindings documentation file
watchdog: mei_wdt: no need to check return value of debugfs_create functions
watchdog: bcm_kona_wdt: no need to check return value of debugfs_create functions
docs: watchdog: Fix build error.
docs: watchdog: convert docs to ReST and rename to *.rst
watchdog: make the device time out at open_deadline when open_timeout is used
watchdog: introduce CONFIG_WATCHDOG_OPEN_TIMEOUT
watchdog: introduce watchdog.open_timeout commandline parameter
dt-bindings: watchdog: move i.MX system controller watchdog binding to SCU
watchdog: imx_sc: Add pretimeout support
watchdog: renesas_wdt: Add a few cycles delay
watchdog: gpio: add support for nowayout option
watchdog: renesas_wdt: Use 'dev' instead of dereferencing it repeatedly
dt-bindings: watchdog: add Allwinner H6 watchdog
watchdog: jz4740: Avoid starting watchdog in set_timeout
watchdog: jz4740: Use register names from <linux/mfd/ingenic-tcu.h>
...
A collection of small fixes.
- The optimization of PM resume with HD-audio HDMI codecs, which
eventually work around weird issues
- A correction of Intel Icelake HDMI audio code
- Quirks for Dell machines with Realtek HD-audio codecs
- The fix for too long sequencer write stall that was spotted by
syzkaller
- A few trivial cleanups reported by coccinelle
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Merge tag 'sound-fix-5.3-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound
Pull sound fixes from Takashi Iwai:
"A collection of small fixes.
- The optimization of PM resume with HD-audio HDMI codecs, which
eventually work around weird issues
- A correction of Intel Icelake HDMI audio code
- Quirks for Dell machines with Realtek HD-audio codecs
- The fix for too long sequencer write stall that was spotted by
syzkaller
- A few trivial cleanups reported by coccinelle"
* tag 'sound-fix-5.3-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound:
ALSA: hda - Don't resume forcibly i915 HDMI/DP codec
ALSA: hda/hdmi - Fix i915 reverse port/pin mapping
ALSA: hda/hdmi - Remove duplicated define
ALSA: seq: Break too long mutex context in the write loop
ALSA: hda/realtek: apply ALC891 headset fixup to one Dell machine
ALSA: rme9652: Unneeded variable: "result".
ALSA: emu10k1: Remove unneeded variable "change"
ALSA: au88x0: Remove unneeded variable: "changed"
ALSA: hda/realtek - Fixed Headphone Mic can't record on Dell platform
ALSA: ps3: Remove Unneeded variable: "ret"
ALSA: lx6464es: Remove unneeded variable err
- Add MMIO interface support to the Intel RAPL power capping
driver and update the int340X thermal driver to provide a
RAPL MMIO interface (Zhang Rui, Stephen Rothwell).
- Add Intel Ice Lake CPU IDs to the RAPL driver (Zhang Rui,
Rajneesh Bhardwaj).
- Make cpufreq use the PM QoS framework (instead of notifiers) for
managing the min and max frequency constraints (Viresh Kumar).
- Add i.MX8MN support to the imx-cpufreq-dt cpufreq driver (Anson
Huang).
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Merge tag 'pm-5.3-rc1-2' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm
Pull more power management updates from Rafael Wysocki:
"These modify the Intel RAPL driver to allow it to use an MMIO
interface to the hardware, make the int340X thermal driver provide
such an interface for it, add Intel Ice Lake CPU IDs to the RAPL
driver (these changes depend on the previously merged x86 arch
changes), update cpufreq to use the PM QoS framework for managing the
min and max frequency limits, and add update the imx-cpufreq-dt
cpufreq driver to support i.MX8MN.
Specifics:
- Add MMIO interface support to the Intel RAPL power capping driver
and update the int340X thermal driver to provide a RAPL MMIO
interface (Zhang Rui, Stephen Rothwell).
- Add Intel Ice Lake CPU IDs to the RAPL driver (Zhang Rui, Rajneesh
Bhardwaj).
- Make cpufreq use the PM QoS framework (instead of notifiers) for
managing the min and max frequency constraints (Viresh Kumar).
- Add i.MX8MN support to the imx-cpufreq-dt cpufreq driver (Anson
Huang)"
* tag 'pm-5.3-rc1-2' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm: (27 commits)
cpufreq: Make cpufreq_generic_init() return void
intel_rapl: need linux/cpuhotplug.h for enum cpuhp_state
powercap/rapl: Add Ice Lake NNPI support to RAPL driver
powercap/intel_rapl: add support for ICX-D
powercap/intel_rapl: add support for ICX
powercap/intel_rapl: add support for IceLake desktop
intel_rapl: Fix module autoloading issue
int340X/processor_thermal_device: add support for MMIO RAPL
intel_rapl: support two power limits for every RAPL domain
intel_rapl: support 64 bit register
intel_rapl: abstract RAPL common code
intel_rapl: cleanup hardcoded MSR access
intel_rapl: cleanup some functions
intel_rapl: abstract register access operations
intel_rapl: abstract register address
intel_rapl: introduce struct rapl_if_private
intel_rapl: introduce intel_rapl.h
intel_rapl: remove hardcoded register index
intel_rapl: use reg instead of msr
cpufreq: imx-cpufreq-dt: Add i.MX8MN support
...
- Make ACPI table loading work more consistently regardless of the
exact mechanism used for loading a table (Erik Schmauss).
- Get rid of two clang warnings (Arnd Bergmann).
- Add new quirk mechanism to the ACPI backlight driver and use it
to add a quirk for PB Easynote MZ35 (Hans de Goede).
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Merge tag 'acpi-5.3-rc1-3' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm
Pull more ACPI updates from Rafael Wysocki:
"These get rid of two clang warnings, add a new quirk mechanism to the
ACPI backlight driver (and apply it to one machine) and update the
table load object initialization in ACPICA (this is a replacement for
a previously reverted ACPICA commit).
Specifics:
- Make ACPI table loading work more consistently regardless of the
exact mechanism used for loading a table (Erik Schmauss).
- Get rid of two clang warnings (Arnd Bergmann).
- Add new quirk mechanism to the ACPI backlight driver and use it to
add a quirk for PB Easynote MZ35 (Hans de Goede)"
* tag 'acpi-5.3-rc1-3' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm:
ACPI: video: Add new hw_changes_brightness quirk, set it on PB Easynote MZ35
ACPI: fix false-positive -Wuninitialized warning
ACPI: blacklist: fix clang warning for unused DMI table
ACPICA: Update table load object initialization
Merge floppy ioctl verification fixes from Denis Efremov.
This also marks the floppy driver as orphaned - it turns out that Jiri
no longer has working hardware.
Actual working physical floppy hardware is getting hard to find, and
while Willy was able to test this, I think the driver can be considered
pretty much dead from an actual hardware standpoint. The hardware that
is still sold seems to be mainly USB-based, which doesn't use this
legacy driver at all.
The old floppy disk controller is still emulated in various VM
environments, so the driver isn't going away, but let's see if anybody
is interested to step up to maintain it.
The lack of hardware also likely means that the ioctl range verification
fixes are probably mostly relevant to anybody using floppies in a
virtual environment. Which is probably also going away in favor of USB
storage emulation, but who knows.
Will Decon reviewed the patches but I'm not rebasing them just for that,
so I'll add a
Reviewed-by: Will Deacon <will@kernel.org>
here instead.
* floppy:
MAINTAINERS: mark floppy.c orphaned
floppy: fix out-of-bounds read in copy_buffer
floppy: fix invalid pointer dereference in drive_name
floppy: fix out-of-bounds read in next_valid_format
floppy: fix div-by-zero in setup_format_params
I volunteered myself to maintain it quite some time ago back when I
fixed the concurrency issues which exhibited itself only with
VM-emulated devices, and at the same time I still had the physical 3.5"
reader to test all the changes.
The reader doesn't work any more though, so I guess it's time to step
down from this super-prestigious role :p and mark floppy.c as Orphaned.
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Commit c296d4dc13 ("asm-generic: fix a compilation warning")
converted the various flush_*cache_* macros in
asm-generic/cacheflush.h to static inline functions. This breaks
RISC-V builds, since RISC-V's cacheflush.h includes the generic
cacheflush.h and then undefines the macros to be overridden.
Fix by copying the subset of the no-op functions that are reused from
the generic cacheflush.h into the RISC-V cacheflush.h, and dropping
the include of the generic cacheflush.h.
Fixes: c296d4dc13 ("asm-generic: fix a compilation warning")
Signed-off-by: Paul Walmsley <paul.walmsley@sifive.com>
Cc: Qian Cai <cai@lca.pw>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
When walking userspace stacks, USER_DS needs to be set, otherwise
access_ok() will not function as expected.
Reported-by: Vegard Nossum <vegard.nossum@oracle.com>
Reported-by: Eiichi Tsukata <devel@etsukata.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Tested-by: Vegard Nossum <vegard.nossum@oracle.com>
Reviewed-by: Joel Fernandes (Google) <joel@joelfernandes.org>
Link: https://lkml.kernel.org/r/20190718085754.GM3402@hirez.programming.kicks-ass.net
* pm-cpufreq:
cpufreq: Make cpufreq_generic_init() return void
cpufreq: imx-cpufreq-dt: Add i.MX8MN support
cpufreq: Add QoS requests for userspace constraints
cpufreq: intel_pstate: Reuse refresh_frequency_limits()
cpufreq: Register notifiers with the PM QoS framework
PM / QoS: Add support for MIN/MAX frequency constraints
PM / QOS: Pass request type to dev_pm_qos_read_value()
PM / QOS: Rename __dev_pm_qos_read_value() and dev_pm_qos_raw_read_value()
PM / QOS: Pass request type to dev_pm_qos_{add|remove}_notifier()
Testing padata with the tcrypt module on a 5.2 kernel...
# modprobe tcrypt alg="pcrypt(rfc4106(gcm(aes)))" type=3
# modprobe tcrypt mode=211 sec=1
...produces this splat:
INFO: task modprobe:10075 blocked for more than 120 seconds.
Not tainted 5.2.0-base+ #16
modprobe D 0 10075 10064 0x80004080
Call Trace:
? __schedule+0x4dd/0x610
? ring_buffer_unlock_commit+0x23/0x100
schedule+0x6c/0x90
schedule_timeout+0x3b/0x320
? trace_buffer_unlock_commit_regs+0x4f/0x1f0
wait_for_common+0x160/0x1a0
? wake_up_q+0x80/0x80
{ crypto_wait_req } # entries in braces added by hand
{ do_one_aead_op }
{ test_aead_jiffies }
test_aead_speed.constprop.17+0x681/0xf30 [tcrypt]
do_test+0x4053/0x6a2b [tcrypt]
? 0xffffffffa00f4000
tcrypt_mod_init+0x50/0x1000 [tcrypt]
...
The second modprobe command never finishes because in padata_reorder,
CPU0's load of reorder_objects is executed before the unlocking store in
spin_unlock_bh(pd->lock), causing CPU0 to miss CPU1's increment:
CPU0 CPU1
padata_reorder padata_do_serial
LOAD reorder_objects // 0
INC reorder_objects // 1
padata_reorder
TRYLOCK pd->lock // failed
UNLOCK pd->lock
CPU0 deletes the timer before returning from padata_reorder and since no
other job is submitted to padata, modprobe waits indefinitely.
Add a pair of full barriers to guarantee proper ordering:
CPU0 CPU1
padata_reorder padata_do_serial
UNLOCK pd->lock
smp_mb()
LOAD reorder_objects
INC reorder_objects
smp_mb__after_atomic()
padata_reorder
TRYLOCK pd->lock
smp_mb__after_atomic is needed so the read part of the trylock operation
comes after the INC, as Andrea points out. Thanks also to Andrea for
help with writing a litmus test.
Fixes: 16295bec63 ("padata: Generic parallelization/serialization interface")
Signed-off-by: Daniel Jordan <daniel.m.jordan@oracle.com>
Cc: <stable@vger.kernel.org>
Cc: Andrea Parri <andrea.parri@amarulasolutions.com>
Cc: Boqun Feng <boqun.feng@gmail.com>
Cc: Herbert Xu <herbert@gondor.apana.org.au>
Cc: Paul E. McKenney <paulmck@linux.ibm.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Steffen Klassert <steffen.klassert@secunet.com>
Cc: linux-arch@vger.kernel.org
Cc: linux-crypto@vger.kernel.org
Cc: linux-kernel@vger.kernel.org
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
SEV_VERSION_GREATER_OR_EQUAL() will fail if upgrading from 2.2 to 3.1, for
example, because the minor version is not equal to or greater than the
major.
Fix this and move to a static inline function for appropriate type
checking.
Fixes: edd303ff0e ("crypto: ccp - Add DOWNLOAD_FIRMWARE SEV command")
Reported-by: Cfir Cohen <cfir@google.com>
Signed-off-by: David Rientjes <rientjes@google.com>
Acked-by: Tom Lendacky <thomas.lendacky@amd.com>
Acked-by: Gary R Hook <gary.hook@amd.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Avoid leaking GCM tag through timing side channel.
Fixes: 36cf515b9b ("crypto: ccp - Enable support for AES GCM on v5 CCPs")
Cc: <stable@vger.kernel.org> # v4.12+
Signed-off-by: Cfir Cohen <cfir@google.com>
Acked-by: Gary R Hook <ghook@amd.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Add a per-transport maximum limit in the socket case, and add
helpers to allow the NFSv4 code to discover that limit.
Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>
- Revert properties exposed in komeda that need improvement before they become ABI.
- Only add modes from the cmdline if they are valid.
- Add orientation quirk for GPD MicroPC.
- Reduce stack usage in drm selftests.
- Fix bochs framebuffer setup.
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Merge tag 'drm-misc-next-fixes-2019-07-11' of git://anongit.freedesktop.org/drm/drm-misc into drm-next
Pull request for drm-misc-fixes-next for v5.3:
- Revert properties exposed in komeda that need improvement before they become ABI.
- Only add modes from the cmdline if they are valid.
- Add orientation quirk for GPD MicroPC.
- Reduce stack usage in drm selftests.
- Fix bochs framebuffer setup.
Signed-off-by: Dave Airlie <airlied@redhat.com>
From: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/e6b84ce4-2728-fb02-87c1-6a6b87703c0b@linux.intel.com
Instead of trying to allocate pages with GFP_USER in
add_ballooned_pages() check the available free memory via
si_mem_available(). GFP_USER is far less limiting memory exhaustion
than the test via si_mem_available().
This will avoid dom0 running out of memory due to excessive foreign
page mappings especially on ARM and on x86 in PVH mode, as those don't
have a pre-ballooned area which can be used for foreign mappings.
As the normal ballooning suffers from the same problem don't balloon
down more than si_mem_available() pages in one iteration. At the same
time limit the default maximum number of retries.
This is part of XSA-300.
Signed-off-by: Juergen Gross <jgross@suse.com>
The elftoolchain version of libelf has a function named elf_open().
The function name isn't quite accurate anyway, since it also reads all
the ELF data. Rename it to elf_read(), which is more accurate.
[ jpoimboe: rename to elf_read(); write commit description ]
Signed-off-by: Michael Forney <mforney@mforney.org>
Signed-off-by: Josh Poimboeuf <jpoimboe@redhat.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Link: https://lkml.kernel.org/r/7ce2d1b35665edf19fd0eb6fbc0b17b81a48e62f.1562793604.git.jpoimboe@redhat.com
perf db-export:
Adrian Hunter:
- Improvements in how COMM details are exported to databases for
post processing and use in the sql-viewer.py UI.
- Export switch events to the database.
BPF:
Arnaldo Carvalho de Melo:
- Bump rlimit(MEMLOCK) for 'perf test bpf' and 'perf trace', just like
selftests/bpf/bpf_rlimit.h do, which makes errors due to exhaustion of
this limit, which are kinda cryptic (EPERM sometimes) less frequent.
perf version:
Ravi Bangoria:
- Fix segfault due to missing OPT_END(), noticed on PowerPC.
perf vendor events:
Thomas Richter:
- Add JSON files for IBM s/390 machine type 8561.
perf cs-etm (ARM):
YueHaibing:
- Fix two cases of error returns not bing done properly: Invalid ERR_PTR() use
and loss of propagation error codes.
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
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Merge tag 'perf-core-for-mingo-5.3-20190715' of git://git.kernel.org/pub/scm/linux/kernel/git/acme/linux into perf/urgent
Pull perf/core improvements and fixes from Arnaldo Carvalho de Melo:
perf db-export:
Adrian Hunter:
- Improvements in how COMM details are exported to databases for
post processing and use in the sql-viewer.py UI.
- Export switch events to the database.
BPF:
Arnaldo Carvalho de Melo:
- Bump rlimit(MEMLOCK) for 'perf test bpf' and 'perf trace', just like
selftests/bpf/bpf_rlimit.h do, which makes errors due to exhaustion of
this limit, which are kinda cryptic (EPERM sometimes) less frequent.
perf version:
Ravi Bangoria:
- Fix segfault due to missing OPT_END(), noticed on PowerPC.
perf vendor events:
Thomas Richter:
- Add JSON files for IBM s/390 machine type 8561.
perf cs-etm (ARM):
YueHaibing:
- Fix two cases of error returns not bing done properly: Invalid ERR_PTR() use
and loss of propagation error codes.
Paul reported that l2tp sessions were broken after the commit referenced
in the Fixes tag. Prior to this commit rt6_check returned NULL if the
rt6_info 'from' was NULL - ie., the dst_entry was disconnected from a FIB
entry. Restore that behavior.
Fixes: 93531c6743 ("net/ipv6: separate handling of FIB entries from dst based routes")
Reported-by: Paul Donohue <linux-kernel@PaulSD.com>
Tested-by: Paul Donohue <linux-kernel@PaulSD.com>
Signed-off-by: David Ahern <dsahern@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
The tipc_msg_validate() function leaves a boolean flag 'validated' in
the validated buffer's control block, to avoid performing this action
more than once. However, at reception of new packets, the position of
this field may already have been set by lower layer protocols, so
that the packet is erroneously perceived as already validated by TIPC.
We fix this by initializing the said field to 'false' before performing
the initial validation.
Signed-off-by: Jon Maloy <jon.maloy@ericsson.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Cong Wang says:
====================
ipv4: relax source validation check for loopback packets
This patchset fixes a corner case when loopback packets get dropped
by rp_filter when we route them from veth to lo. Patch 1 is the fix
and patch 2 provides a simplified test case for this scenario.
====================
Signed-off-by: David S. Miller <davem@davemloft.net>
Add a test case to simulate the loopback packet case fixed
in the previous patch.
This test gets passed after the fix:
IPv4 rp_filter tests
TEST: rp_filter passes local packets [ OK ]
TEST: rp_filter passes loopback packets [ OK ]
Cc: David Ahern <dsahern@gmail.com>
Signed-off-by: Cong Wang <xiyou.wangcong@gmail.com>
Reviewed-by: David Ahern <dsahern@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
In a rare case where we redirect local packets from veth to lo,
these packets fail to pass the source validation when rp_filter
is turned on, as the tracing shows:
<...>-311708 [040] ..s1 7951180.957825: fib_table_lookup: table 254 oif 0 iif 1 src 10.53.180.130 dst 10.53.180.130 tos 0 scope 0 flags 0
<...>-311708 [040] ..s1 7951180.957826: fib_table_lookup_nh: nexthop dev eth0 oif 4 src 10.53.180.130
So, the fib table lookup returns eth0 as the nexthop even though
the packets are local and should be routed to loopback nonetheless,
but they can't pass the dev match check in fib_info_nh_uses_dev()
without this patch.
It should be safe to relax this check for this special case, as
normally packets coming out of loopback device still have skb_dst
so they won't even hit this slow path.
Cc: Julian Anastasov <ja@ssi.bg>
Cc: David Ahern <dsahern@gmail.com>
Signed-off-by: Cong Wang <xiyou.wangcong@gmail.com>
Reviewed-by: David Ahern <dsahern@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Ido Schimmel says:
====================
mlxsw: Two fixes
This patchset contains two fixes for mlxsw.
Patch #1 from Petr fixes an issue in which DSCP rewrite can occur even
if the egress port was switched to Trust L2 mode where priority mapping
is based on PCP.
Patch #2 fixes a problem where packets can be learned on a non-existing
FID if a tc filter with a redirect action is configured on a bridged
port. The problem and fix are explained in detail in the commit message.
Please consider both patches for 5.2.y
====================
Signed-off-by: David S. Miller <davem@davemloft.net>
The switch periodically sends notifications about learned FDB entries.
Among other things, the notification includes the FID (Filtering
Identifier) and the port on which the MAC was learned.
In case the driver does not have the FID defined on the relevant port,
the following error will be periodically generated:
mlxsw_spectrum2 0000:06:00.0 swp32: Failed to find a matching {Port, VID} following FDB notification
This is not supposed to happen under normal conditions, but can happen
if an ingress tc filter with a redirect action is installed on a bridged
port. The redirect action will cause the packet's FID to be changed to
the dummy FID and a learning notification will be emitted with this FID
- which is not defined on the bridged port.
Fix this by having the driver ignore learning notifications generated
with the dummy FID and delete them from the device.
Another option is to chain an ignore action after the redirect action
which will cause the device to disable learning, but this means that we
need to consume another action whenever a redirect action is used. In
addition, the scenario described above is merely a corner case.
Fixes: cedbb8b259 ("mlxsw: spectrum_flower: Set dummy FID before forward action")
Signed-off-by: Ido Schimmel <idosch@mellanox.com>
Reported-by: Alex Kushnarov <alexanderk@mellanox.com>
Acked-by: Jiri Pirko <jiri@mellanox.com>
Tested-by: Alex Kushnarov <alexanderk@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Spectrum systems use DSCP rewrite map to update DSCP field in egressing
packets to correspond to priority that the packet has. Whether rewriting
will take place is determined at the point when the packet ingresses the
switch: if the port is in Trust L3 mode, packet priority is determined from
the DSCP map at the port, and DSCP rewrite will happen. If the port is in
Trust L2 mode, 802.1p is used for packet prioritization, and no DSCP
rewrite will happen.
The driver determines the port trust mode based on whether any DSCP
prioritization rules are in effect at given port. If there are any, trust
level is L3, otherwise it's L2. When the last DSCP rule is removed, the
port is switched to trust L2. Under that scenario, if DSCP of a packet
should be rewritten, it should be rewritten to 0.
However, when switching to Trust L2, the driver neglects to also update the
DSCP rewrite map. The last DSCP rule thus remains in effect, and packets
egressing through this port, if they have the right priority, will have
their DSCP set according to this rule.
Fix by first configuring the rewrite map, and only then switching to trust
L2 and bailing out.
Fixes: b2b1dab688 ("mlxsw: spectrum: Support ieee_setapp, ieee_delapp")
Signed-off-by: Petr Machata <petrm@mellanox.com>
Reported-by: Alex Veber <alexve@mellanox.com>
Tested-by: Alex Veber <alexve@mellanox.com>
Signed-off-by: Ido Schimmel <idosch@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
ag71xx uses devm_ioremap_nocache. This fixes usage of an implicit function
Fixes: d51b6ce441 ("net: ethernet: add ag71xx driver")
Signed-off-by: Rosen Penev <rosenp@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This fixes a global out-of-bounds read access in the copy_buffer
function of the floppy driver.
The FDDEFPRM ioctl allows one to set the geometry of a disk. The sect
and head fields (unsigned int) of the floppy_drive structure are used to
compute the max_sector (int) in the make_raw_rw_request function. It is
possible to overflow the max_sector. Next, max_sector is passed to the
copy_buffer function and used in one of the memcpy calls.
An unprivileged user could trigger the bug if the device is accessible,
but requires a floppy disk to be inserted.
The patch adds the check for the .sect * .head multiplication for not
overflowing in the set_geometry function.
The bug was found by syzkaller.
Signed-off-by: Denis Efremov <efremov@ispras.ru>
Tested-by: Willy Tarreau <w@1wt.eu>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This fixes the invalid pointer dereference in the drive_name function of
the floppy driver.
The native_format field of the struct floppy_drive_params is used as
floppy_type array index in the drive_name function. Thus, the field
should be checked the same way as the autodetect field.
To trigger the bug, one could use a value out of range and set the drive
parameters with the FDSETDRVPRM ioctl. Next, FDGETDRVTYP ioctl should
be used to call the drive_name. A floppy disk is not required to be
inserted.
CAP_SYS_ADMIN is required to call FDSETDRVPRM.
The patch adds the check for a value of the native_format field to be in
the '0 <= x < ARRAY_SIZE(floppy_type)' range of the floppy_type array
indices.
The bug was found by syzkaller.
Signed-off-by: Denis Efremov <efremov@ispras.ru>
Tested-by: Willy Tarreau <w@1wt.eu>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This fixes a global out-of-bounds read access in the next_valid_format
function of the floppy driver.
The values from autodetect field of the struct floppy_drive_params are
used as indices for the floppy_type array in the next_valid_format
function 'floppy_type[DP->autodetect[probed_format]].sect'.
To trigger the bug, one could use a value out of range and set the drive
parameters with the FDSETDRVPRM ioctl. A floppy disk is not required to
be inserted.
CAP_SYS_ADMIN is required to call FDSETDRVPRM.
The patch adds the check for values of the autodetect field to be in the
'0 <= x < ARRAY_SIZE(floppy_type)' range of the floppy_type array indices.
The bug was found by syzkaller.
Signed-off-by: Denis Efremov <efremov@ispras.ru>
Tested-by: Willy Tarreau <w@1wt.eu>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This fixes a divide by zero error in the setup_format_params function of
the floppy driver.
Two consecutive ioctls can trigger the bug: The first one should set the
drive geometry with such .sect and .rate values for the F_SECT_PER_TRACK
to become zero. Next, the floppy format operation should be called.
A floppy disk is not required to be inserted. An unprivileged user
could trigger the bug if the device is accessible.
The patch checks F_SECT_PER_TRACK for a non-zero value in the
set_geometry function. The proper check should involve a reasonable
upper limit for the .sect and .rate fields, but it could change the
UAPI.
The patch also checks F_SECT_PER_TRACK in the setup_format_params, and
cancels the formatting operation in case of zero.
The bug was found by syzkaller.
Signed-off-by: Denis Efremov <efremov@ispras.ru>
Tested-by: Willy Tarreau <w@1wt.eu>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Despite the current efforts to read CR2 before tracing happens there still
exist a number of possible holes:
idtentry page_fault do_page_fault has_error_code=1
call error_entry
TRACE_IRQS_OFF
call trace_hardirqs_off*
#PF // modifies CR2
CALL_enter_from_user_mode
__context_tracking_exit()
trace_user_exit(0)
#PF // modifies CR2
call do_page_fault
address = read_cr2(); /* whoopsie */
And similar for i386.
Fix it by pulling the CR2 read into the entry code, before any of that
stuff gets a chance to run and ruin things.
Reported-by: He Zhe <zhe.he@windriver.com>
Reported-by: Eiichi Tsukata <devel@etsukata.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Andy Lutomirski <luto@kernel.org>
Cc: bp@alien8.de
Cc: rostedt@goodmis.org
Cc: torvalds@linux-foundation.org
Cc: hpa@zytor.com
Cc: dave.hansen@linux.intel.com
Cc: jgross@suse.com
Cc: joel@joelfernandes.org
Link: https://lkml.kernel.org/r/20190711114336.116812491@infradead.org
Debugged-by: Steven Rostedt <rostedt@goodmis.org>
On parisc the privilege level of a process is stored in the lowest two bits of
the instruction pointers (IAOQ0 and IAOQ1). On Linux we use privilege level 0
for the kernel and privilege level 3 for user-space. So userspace should not be
allowed to modify IAOQ0 or IAOQ1 of a ptraced process to change it's privilege
level to e.g. 0 to try to gain kernel privileges.
This patch prevents such modifications in the regset support functions by
always setting the two lowest bits to one (which relates to privilege level 3
for user-space) if IAOQ0 or IAOQ1 are modified via ptrace regset calls.
Link: https://bugs.gentoo.org/481768
Cc: <stable@vger.kernel.org> # v4.7+
Tested-by: Rolf Eike Beer <eike-kernel@sf-tec.de>
Signed-off-by: Helge Deller <deller@gmx.de>
On parisc the privilege level of a process is stored in the lowest two bits of
the instruction pointers (IAOQ0 and IAOQ1). On Linux we use privilege level 0
for the kernel and privilege level 3 for user-space. So userspace should not be
allowed to modify IAOQ0 or IAOQ1 of a ptraced process to change it's privilege
level to e.g. 0 to try to gain kernel privileges.
This patch prevents such modifications by always setting the two lowest bits to
one (which relates to privilege level 3 for user-space) if IAOQ0 or IAOQ1 are
modified via ptrace calls in the native and compat ptrace paths.
Link: https://bugs.gentoo.org/481768
Reported-by: Jeroen Roovers <jer@gentoo.org>
Cc: <stable@vger.kernel.org>
Tested-by: Rolf Eike Beer <eike-kernel@sf-tec.de>
Signed-off-by: Helge Deller <deller@gmx.de>
For qdisc's that support TC filters and set TCQ_F_CAN_BYPASS,
notably fq_codel, it makes no sense to let packets bypass the TC
filters we setup in any scenario, otherwise our packets steering
policy could not be enforced.
This can be reproduced easily with the following script:
ip li add dev dummy0 type dummy
ifconfig dummy0 up
tc qd add dev dummy0 root fq_codel
tc filter add dev dummy0 parent 8001: protocol arp basic action mirred egress redirect dev lo
tc filter add dev dummy0 parent 8001: protocol ip basic action mirred egress redirect dev lo
ping -I dummy0 192.168.112.1
Without this patch, packets are sent directly to dummy0 without
hitting any of the filters. With this patch, packets are redirected
to loopback as expected.
This fix is not perfect, it only unsets the flag but does not set it back
because we have to save the information somewhere in the qdisc if we
really want that. Note, both fq_codel and sfq clear this flag in their
->bind_tcf() but this is clearly not sufficient when we don't use any
class ID.
Fixes: 23624935e0 ("net_sched: TCQ_F_CAN_BYPASS generalization")
Cc: Eric Dumazet <edumazet@google.com>
Signed-off-by: Cong Wang <xiyou.wangcong@gmail.com>
Reviewed-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Provide better naming for ABI, i.e. tell that we have fan boost mode.
The following is an automated git shortlog grouped by driver:
asus:
- Rename "fan mode" to "fan boost mode"
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Merge tag 'platform-drivers-x86-v5.3-2' of git://git.infradead.org/linux-platform-drivers-x86
Pull another x86 platform driver update from Andy Shevchenko:
"Provide better naming for ABI, i.e. tell that we have fan boost mode.
It won't break any ABI, but has to be done now to avoid confusion in
the future"
* tag 'platform-drivers-x86-v5.3-2' of git://git.infradead.org/linux-platform-drivers-x86:
platform/x86: asus: Rename "fan mode" to "fan boost mode"
- Revert a SPIO GPIO fix that didn't fix anything instead created new
problems.
- Remove the EM GPIO irqdomain in a safe manner.
- Fix a memory leak in the gpio quirks.
- Make the DaVinci error path silent on probe deferral.
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Merge tag 'gpio-v5.3-2' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-gpio
Pull GPIO fixes from Linus Walleij:
- Revert a SPIO GPIO fix that didn't fix anything but instead created
new problems.
- Remove the EM GPIO irqdomain in a safe manner.
- Fix a memory leak in the gpio quirks.
- Make the DaVinci error path silent on probe deferral.
* tag 'gpio-v5.3-2' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-gpio:
Revert "gpio/spi: Fix spi-gpio regression on active high CS"
gpio: em: remove the gpiochip before removing the irq domain
gpiolib: of: fix a memory leak in of_gpio_flags_quirks()
gpio: davinci: silence error prints in case of EPROBE_DEFER
Gerd Rausch says:
====================
net/rds: RDMA fixes
A number of net/rds fixes necessary to make "rds_rdma.ko"
pass some basic Oracle internal tests.
====================
Signed-off-by: David S. Miller <davem@davemloft.net>
Otherwise, if an IB connection is torn down before "rds_ib_setup_qp"
is called, the value of "ic->i_fastreg_wrs" is still at zero
(as it wasn't initialized by "rds_ib_setup_qp").
Consequently "rds_ib_conn_path_shutdown" will spin forever,
waiting for it to go back to "RDS_IB_DEFAULT_FR_WR",
which of course will never happen as there are no
outstanding work requests.
Signed-off-by: Gerd Rausch <gerd.rausch@oracle.com>
Acked-by: Santosh Shilimkar <santosh.shilimkar@oracle.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
