The binderfs_binder_ctl_create() call is a no-op on subsequent calls and
the first call is done before we unlock the suberblock. Hence, there is no
need to take inode_lock() in there. Let's remove it.
Suggested-by: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Christian Brauner <christian@brauner.io>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Al pointed out that first calling kill_litter_super() before cleaning up
info is more correct since destroying info doesn't depend on the state of
the dentries and inodes. That the opposite remains true is not guaranteed.
Suggested-by: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Christian Brauner <christian@brauner.io>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
- switch from d_alloc_name() + d_lookup() to lookup_one_len():
Instead of using d_alloc_name() and then doing a d_lookup() with the
allocated dentry to find whether a device with the name we're trying to
create already exists switch to using lookup_one_len(). The latter will
either return the existing dentry or a new one.
- switch from kmalloc() + strscpy() to kmemdup():
Use a more idiomatic way to copy the name for the new dentry that
userspace gave us.
Suggested-by: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Christian Brauner <christian@brauner.io>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Al pointed out that on binderfs_fill_super() error
deactivate_locked_super() will call binderfs_kill_super() so all of the
freeing and putting we currently do in binderfs_fill_super() is unnecessary
and buggy. Let's simply return errors and let binderfs_fill_super() take
care of cleaning up on error.
Suggested-by: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Christian Brauner <christian@brauner.io>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
- make binderfs control dentry immutable:
We don't allow to unlink it since it is crucial for binderfs to be
useable but if we allow to rename it we make the unlink trivial to
bypass. So prevent renaming too and simply treat the control dentry as
immutable.
- add is_binderfs_control_device() helper:
Take the opportunity and turn the check for the control dentry into a
separate helper is_binderfs_control_device() since it's now used in two
places.
- simplify binderfs_rename():
Instead of hand-rolling our custom version of simple_rename() just dumb
the whole function down to first check whether we're trying to rename the
control dentry. If we do EPERM the caller and if not call simple_rename().
Suggested-by: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Christian Brauner <christian@brauner.io>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
The comment stems from an early version of that patchset and is just
confusing now.
Cc: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Christian Brauner <christian@brauner.io>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
We allow more then 255 binderfs binder devices to be created since there
are workloads that require more than that. If we use __u8 we'll overflow
after 255. So let's use a __u32.
Note that there's no released kernel with binderfs out there so this is
not a regression.
Signed-off-by: Christian Brauner <christian@brauner.io>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
When we switched over from binder_ctl.h to binderfs.h we forgot to change
the include guards. It's minor but it's obviously correct.
Signed-off-by: Christian Brauner <christian@brauner.io>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
In the error path of map_sg there is an incorrect if condition
for breaking out of the loop that searches the scatterlist
for mapped pages to unmap. Instead of breaking out of the
loop once all the pages that were mapped have been unmapped,
it will break out of the loop after it has unmapped 1 page.
Fix the condition, so it breaks out of the loop only after
all the mapped pages have been unmapped.
Fixes: 80187fd39d ("iommu/amd: Optimize map_sg and unmap_sg")
Cc: Joerg Roedel <joro@8bytes.org>
Signed-off-by: Jerry Snitselaar <jsnitsel@redhat.com>
Signed-off-by: Joerg Roedel <jroedel@suse.de>
In the error path of map_sg, free_iova_fast is being called with
address instead of the pfn. This results in a bad value getting into
the rcache, and can result in hitting a BUG_ON when
iova_magazine_free_pfns is called.
Cc: Joerg Roedel <joro@8bytes.org>
Cc: Suravee Suthikulpanit <suravee.suthikulpanit@amd.com>
Signed-off-by: Jerry Snitselaar <jsnitsel@redhat.com>
Fixes: 80187fd39d ("iommu/amd: Optimize map_sg and unmap_sg")
Signed-off-by: Joerg Roedel <jroedel@suse.de>
Often userspace doesn't know when the kernel will be calling dma_buf_detach
on the buffer.
If userpace starts its CPU access at the same time as the sg list is being
freed it could end up accessing the sg list after it has been freed.
Thread A Thread B
- DMA_BUF_IOCTL_SYNC IOCT
- ion_dma_buf_begin_cpu_access
- list_for_each_entry
- ion_dma_buf_detatch
- free_duped_table
- dma_sync_sg_for_cpu
Fix this by getting the ion_buffer lock before freeing the sg table memory.
Fixes: 2a55e7b5e5 ("staging: android: ion: Call dma_map_sg for syncing and mapping")
Signed-off-by: Liam Mark <lmark@codeaurora.org>
Acked-by: Laura Abbott <labbott@redhat.com>
Acked-by: Andrew F. Davis <afd@ti.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Commit cbffaf7aa0 ("can: flexcan: Always use last mailbox for TX")
introduced a loop letting i run up to (including) ARRAY_SIZE(regs->mb)
and in the body accessed regs->mb[i] which is an out-of-bounds array
access that then resulted in an access to an reserved register area.
Later this was changed by commit 0517961ccd ("can: flexcan: Add
provision for variable payload size") to iterate a bit differently but
still runs one iteration too much resulting to call
flexcan_get_mb(priv, priv->mb_count)
which results in a WARN_ON and then a NULL pointer exception. This
only affects devices compatible with "fsl,p1010-flexcan",
"fsl,imx53-flexcan", "fsl,imx35-flexcan", "fsl,imx25-flexcan",
"fsl,imx28-flexcan", so newer i.MX SoCs are not affected.
Fixes: cbffaf7aa0 ("can: flexcan: Always use last mailbox for TX")
Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Cc: linux-stable <stable@vger.kernel.org> # >= 4.20
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
Kyungtae Kim detected a potential integer overflow in bcm_[rx|tx]_setup()
when the conversion into ktime multiplies the given value with NSEC_PER_USEC
(1000).
Reference: https://marc.info/?l=linux-can&m=154732118819828&w=2
Add a check for the given tv_usec, so that the value stays below one second.
Additionally limit the tv_sec value to a reasonable value for CAN related
use-cases of 400 days and ensure all values to be positive.
Reported-by: Kyungtae Kim <kt0755@gmail.com>
Tested-by: Oliver Hartkopp <socketcan@hartkopp.net>
Signed-off-by: Oliver Hartkopp <socketcan@hartkopp.net>
Cc: linux-stable <stable@vger.kernel.org> # >= 2.6.26
Tested-by: Kyungtae Kim <kt0755@gmail.com>
Acked-by: Andre Naujoks <nautsch2@gmail.com>
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
This patch revert commit 7da11ba5c5
("can: dev: __can_get_echo_skb(): print error message, if trying to echo non existing skb")
After introduction of this change we encountered following new error
message on various i.MX plattforms (flexcan):
| flexcan 53fc8000.can can0: __can_get_echo_skb: BUG! Trying to echo non
| existing skb: can_priv::echo_skb[0]
The introduction of the message was a mistake because
priv->echo_skb[idx] = NULL is a perfectly valid in following case: If
CAN_RAW_LOOPBACK is disabled (setsockopt) in applications, the pkt_type
of the tx skb's given to can_put_echo_skb is set to PACKET_LOOPBACK. In
this case can_put_echo_skb will not set priv->echo_skb[idx]. It is
therefore kept NULL.
As additional argument for revert: The order of check and usage of idx
was changed. idx is used to access an array element before checking it's
boundaries.
Signed-off-by: Manfred Schlaegl <manfred.schlaegl@ginzinger.com>
Fixes: 7da11ba5c5 ("can: dev: __can_get_echo_skb(): print error message, if trying to echo non existing skb")
Cc: linux-stable <stable@vger.kernel.org>
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
Kernel:
Stephane Eranian:
- Fix perf_proc_update_handler() bug.
perf script:
Andi Kleen:
- Fix crash with printing mixed trace point and other events.
Tony Jones:
- Fix crash when processing recorded stat data.
perf top:
He Kuang:
- Fix wrong hottest instruction highlighted.
perf python:
Arnaldo Carvalho de Melo:
- Remove -fstack-clash-protection when building with some clang versions.
perf ordered_events:
Jiri Olsa:
- Fix out of buffers crash in ordered_events__free().
perf cpu_map:
Stephane Eranian:
- Handle TOPOLOGY headers with no CPU.
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
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Merge tag 'perf-urgent-for-mingo-5.0-20190121' of git://git.kernel.org/pub/scm/linux/kernel/git/acme/linux into perf/urgent
Pull perf/urgent fixes from Arnaldo Carvalho de Melo:
Kernel:
Stephane Eranian:
- Fix perf_proc_update_handler() bug.
perf script:
Andi Kleen:
- Fix crash with printing mixed trace point and other events.
Tony Jones:
- Fix crash when processing recorded stat data.
perf top:
He Kuang:
- Fix wrong hottest instruction highlighted.
perf python:
Arnaldo Carvalho de Melo:
- Remove -fstack-clash-protection when building with some clang versions.
perf ordered_events:
Jiri Olsa:
- Fix out of buffers crash in ordered_events__free().
perf cpu_map:
Stephane Eranian:
- Handle TOPOLOGY headers with no CPU.
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
The H6 main pin controller has four banks of interrupt-triggering pins.
The driver as originally submitted only specified three, but had pin
descriptions referencing a fourth bank. This results in a out-of-bounds
access into .irq_array of struct sunxi_pinctrl. This however did not
result in a crash until v4.20, with commit a66d972465 ("devres: Align
data[] to ARCH_KMALLOC_MINALIGN"), which changed the alignment of memory
region returned by devm_kcalloc(). The increase likely moved the
out-of-bounds access into the next, unmapped page.
With KASAN on, the bug is quite clear:
BUG: KASAN: slab-out-of-bounds in sunxi_pinctrl_init_with_variant+0x49c/0x12b8
Write of size 4 at addr ffff80002c680280 by task swapper/0/1
CPU: 2 PID: 1 Comm: swapper/0 Not tainted 5.0.0-rc1-00016-gc480a5e6a077 #3
Hardware name: OrangePi Lite2 (DT)
Call trace:
dump_backtrace+0x0/0x220
show_stack+0x14/0x20
dump_stack+0xac/0xd4
print_address_description+0x60/0x25c
kasan_report+0x14c/0x1ac
__asan_store4+0x80/0xa0
sunxi_pinctrl_init_with_variant+0x49c/0x12b8
h6_pinctrl_probe+0x18/0x20
platform_drv_probe+0x6c/0xc8
really_probe+0x244/0x4b0
driver_probe_device.part.4+0x11c/0x164
__driver_attach+0x120/0x190
bus_for_each_dev+0xe8/0x158
driver_attach+0x30/0x40
bus_add_driver+0x308/0x318
driver_register+0xbc/0x1d0
__platform_driver_register+0x7c/0x88
h6_pinctrl_driver_init+0x18/0x20
do_one_initcall+0xd4/0x208
kernel_init_freeable+0x230/0x2c8
kernel_init+0x10/0x108
ret_from_fork+0x10/0x1c
Allocated by task 1:
kasan_kmalloc.part.0+0x4c/0x100
kasan_kmalloc+0xc4/0xe8
kasan_slab_alloc+0x14/0x20
__kmalloc_track_caller+0x130/0x238
devm_kmalloc+0x34/0xd0
sunxi_pinctrl_init_with_variant+0x1d8/0x12b8
h6_pinctrl_probe+0x18/0x20
platform_drv_probe+0x6c/0xc8
really_probe+0x244/0x4b0
driver_probe_device.part.4+0x11c/0x164
__driver_attach+0x120/0x190
bus_for_each_dev+0xe8/0x158
driver_attach+0x30/0x40
bus_add_driver+0x308/0x318
driver_register+0xbc/0x1d0
__platform_driver_register+0x7c/0x88
h6_pinctrl_driver_init+0x18/0x20
do_one_initcall+0xd4/0x208
kernel_init_freeable+0x230/0x2c8
kernel_init+0x10/0x108
ret_from_fork+0x10/0x1c
Freed by task 0:
(stack is not available)
The buggy address belongs to the object at ffff80002c680080
which belongs to the cache kmalloc-512 of size 512
The buggy address is located 0 bytes to the right of
512-byte region [ffff80002c680080, ffff80002c680280)
The buggy address belongs to the page:
page:ffff7e0000b1a000 count:1 mapcount:0 mapping:ffff80002e00c780 index:0xffff80002c683c80 compound_mapcount: 0
flags: 0x10200(slab|head)
raw: 0000000000010200 ffff80002e003a10 ffff80002e003a10 ffff80002e00c780
raw: ffff80002c683c80 0000000000100001 00000001ffffffff 0000000000000000
page dumped because: kasan: bad access detected
Memory state around the buggy address:
ffff80002c680180: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
ffff80002c680200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
>ffff80002c680280: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
^
ffff80002c680300: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
ffff80002c680380: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
Correct the number of IRQ banks so there are no more mismatches.
Fixes: c8a8309049 ("pinctrl: sunxi: add support for the Allwinner H6 main pin controller")
Cc: <stable@vger.kernel.org>
Signed-off-by: Chen-Yu Tsai <wens@csie.org>
Tested-by: Neil Armstrong <narmstrong@baylibre.com>
Acked-by: Maxime Ripard <maxime.ripard@bootlin.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Although TMDS clock is required for HDMI to properly function,
nobody called clk_prepare_enable(). This fixes reference counting
issues and makes sure clock is running when it needs to be running.
Due to TDMS clock being parent clock for DDC clock, TDMS clock
was turned on/off for each EDID probe, causing spurious failures
for certain HDMI/DVI screens.
Fixes: 9c5681011a ("drm/sun4i: Add HDMI support")
Signed-off-by: Priit Laes <priit.laes@paf.com>
[Maxime: Moved the TMDS clock enable earlier]
Signed-off-by: Maxime Ripard <maxime.ripard@bootlin.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20190122073232.7240-1-plaes@plaes.org
The geni set/get_mctrl() functions currently do nothing unless
hardware flow control is enabled. Remove this arbitrary limitation.
Suggested-by: Johan Hovold <johan@kernel.org>
Fixes: 8a8a66a1a1 ("tty: serial: qcom_geni_serial: Add support for flow control")
Signed-off-by: Matthias Kaehlcke <mka@chromium.org>
Reviewed-by: Johan Hovold <johan@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
The SPDX license identifier and the boiler plate text are
contradicting. Only the SPDX license identifier is needed. The
other one is removed.
Fixes: 86958dcc5a ("mmc: dw_mmc-bluefield: Add driver extension")
Cc: stable@vger.kernel.org
Reviewed-by: David Woods <dwoods@mellanox.com>
Signed-off-by: Liming Sun <lsun@mellanox.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Fix some oversights in the XArray porcelain API:
- support for m68k's two-byte aligned pointers
- reserving entries using xa_insert()
- missing xa_insert_bh() and xa_insert_irq() functions
- simplify using xa_for_each()
- use lockdep correctly
- a few other minor fixes and improvements
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Merge tag 'xarray-5.0-rc3' of git://git.infradead.org/users/willy/linux-dax
Pull XArray fixes from Matthew Wilcox:
"Fix some oversights in the XArray porcelain API:
- support for m68k's two-byte aligned pointers
- reserving entries using xa_insert()
- missing xa_insert_bh() and xa_insert_irq() functions
- simplify using xa_for_each()
- use lockdep correctly
- a few other minor fixes and improvements"
* tag 'xarray-5.0-rc3' of git://git.infradead.org/users/willy/linux-dax:
XArray: Fix an arithmetic error in xa_is_err
XArray tests: Check mark 2 gets squashed
XArray: Fix typo in comment
XArray: Honour reserved entries in xa_insert
XArray: Permit storing 2-byte-aligned pointers
XArray: Change xa_for_each iterator
XArray: Turn xa_init_flags into a static inline
XArray tests: Add RCU locking
Work must hold a kref on the ib_device otherwise the dev pointer can
become free before the work runs. This can happen because the work is
being pushed onto the system work queue which is not flushed during driver
unregister.
Remove the bogus use of 'reg_state':
- While in uverbs the reg_state is guaranteed to always be
REGISTERED
- Testing reg_state with no locking is bogus. Use ib_device_try_get()
to get back into a region that prevents unregistration.
For now continue with a flow that is similar to the existing code.
Fixes: 813e90b1ae ("IB/mlx5: Add advise_mr() support")
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
Reviewed-by: Moni Shoua <monis@mellanox.com>
It turns out future patches need this capability quite widely now, not
just for netlink, so provide two global functions to manage the
registration lock refcount.
This also moves the point the lock becomes 1 to within
ib_register_device() so that the semantics of the public API are very sane
and clear. Calling ib_device_try_get() will fail on devices that are only
allocated but not yet registered.
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
Reviewed-by: Steve Wise <swise@opengridcomputing.com>
Reviewed-by: Parav Pandit <parav@mellanox.com>
Fix potential memory corruption and panic in loopback for IB_WR_SEND
variants.
The code blindly assumes the posted length will fit in the fetched rwqe,
which is not a valid assumption.
Fix by adding a limit test, and triggering the appropriate send completion
and putting the QP in an error state. This mimics the handling for
non-loopback QPs.
Fixes: 1570346153 ("IB/{hfi1, qib, rdmavt}: Move ruc_loopback to rdmavt")
Cc: <stable@vger.kernel.org> #v4.20+
Reviewed-by: Michael J. Ruhl <michael.j.ruhl@intel.com>
Signed-off-by: Mike Marciniszyn <mike.marciniszyn@intel.com>
Signed-off-by: Dennis Dalessandro <dennis.dalessandro@intel.com>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
Applications that use the stack for execution purposes cause userspace PSM
jobs to fail during mmap().
Both Fortran (non-standard format parsing) and C (callback functions
located in the stack) applications can be written such that stack
execution is required. The linker notes this via the gnu_stack ELF flag.
This causes READ_IMPLIES_EXEC to be set which forces all PROT_READ mmaps
to have PROT_EXEC for the process.
Checking for VM_EXEC bit and failing the request with EPERM is overly
conservative and will break any PSM application using executable stacks.
Cc: <stable@vger.kernel.org> #v4.14+
Fixes: 1222026764 ("IB/hfi: Protect against writable mmap")
Reviewed-by: Mike Marciniszyn <mike.marciniszyn@intel.com>
Reviewed-by: Dennis Dalessandro <dennis.dalessandro@intel.com>
Reviewed-by: Ira Weiny <ira.weiny@intel.com>
Signed-off-by: Michael J. Ruhl <michael.j.ruhl@intel.com>
Signed-off-by: Dennis Dalessandro <dennis.dalessandro@intel.com>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
The work completion length for a receiving a UD send with immediate is
short by 4 bytes causing application using this opcode to fail.
The UD receive logic incorrectly subtracts 4 bytes for immediate
value. These bytes are already included in header length and are used to
calculate header/payload split, so the result is these 4 bytes are
subtracted twice, once when the header length subtracted from the overall
length and once again in the UD opcode specific path.
Remove the extra subtraction when handling the opcode.
Fixes: 7724105686 ("IB/hfi1: add driver files")
Reviewed-by: Michael J. Ruhl <michael.j.ruhl@intel.com>
Signed-off-by: Brian Welty <brian.welty@intel.com>
Signed-off-by: Mike Marciniszyn <mike.marciniszyn@intel.com>
Signed-off-by: Dennis Dalessandro <dennis.dalessandro@intel.com>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
When the flags verification was added two flags were missed from the
check:
* MLX5_QP_FLAG_TIR_ALLOW_SELF_LB_UC
* MLX5_QP_FLAG_TIR_ALLOW_SELF_LB_MC
This causes user applications that were using these flags to break.
Fixes: 2e43bb31b8 ("IB/mlx5: Verify that driver supports user flags")
Signed-off-by: Mark Bloch <markb@mellanox.com>
Signed-off-by: Leon Romanovsky <leonro@mellanox.com>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
gfxclk for OD setting is limited to 1980M for non-acg
ASICs of Vega10
Signed-off-by: Kenneth Feng <kenneth.feng@amd.com>
Reviewed-by: Evan Quan <evan.quan@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
One fix only for now:
- Fix probe deferral in iommu/of code (broke with recent changes
to iommu_ops->add_device invocation)
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Merge tag 'iommu-fixes-v5.0-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/joro/iommu
Pull IOMMU fix from Joerg Roedel:
"One fix only for now: Fix probe deferral in iommu/of code (broke with
recent changes to iommu_ops->add_device invocation)"
* tag 'iommu-fixes-v5.0-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/joro/iommu:
iommu/of: Fix probe-deferral
- Perf support for raw events
- boot log printing: return stack, action points
- fix memset to avoid prefetchw bleeding past end of buffer
- do_page_fault fix for mmap_sem held while returning to userspace
- other miscll fixes
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Merge tag 'arc-5.0-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/vgupta/arc
Pull ARC architecture updates from Vineet Gupta:
- Perf support for raw events
- boot log printing: return stack, action points
- fix memset to avoid prefetchw bleeding past end of buffer
- do_page_fault fix for mmap_sem held while returning to userspace
- other misc fixes
* tag 'arc-5.0-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/vgupta/arc:
ARCv2: lib: memeset: fix doing prefetchw outside of buffer
ARC: mm: do_page_fault fixes#1: relinquish mmap_sem if signal arrives while handle_mm_fault
ARC: show_regs: lockdep: re-enable preemption
ARC: show_regs: lockdep: avoid page allocator...
ARC: perf: avoid kernel killing where it is possible
ARC: perf: move HW events mapping to separate function
ARC: perf: introduce Kernel PMU events support
ARC: perf: trivial code cleanup
ARC: perf: map generic branches to correct hardware condition
ARC: adjust memblock_reserve of kernel memory
arc: remove redundant kernel-space generic-y
ARC: fix __ffs return value to avoid build warnings
ARC: boot log: print Action point details
ARCv2: boot log: BPU return stack depth
The _DSM function number validation only happens to succeed when the
generic Linux command number translation corresponds with a
DSM-family-specific function number. This breaks NVDIMM-N
implementations that correctly implement _LSR, _LSW, and _LSI, but do
not happen to publish support for DSM function numbers 4, 5, and 6.
Recall that the support for _LS{I,R,W} family of methods results in the
DIMM being marked as supporting those command numbers at
acpi_nfit_register_dimms() time. The DSM function mask is only used for
ND_CMD_CALL support of non-NVDIMM_FAMILY_INTEL devices.
Fixes: 31eca76ba2 ("nfit, libnvdimm: limited/whitelisted dimm command...")
Cc: <stable@vger.kernel.org>
Link: https://github.com/pmem/ndctl/issues/78
Reported-by: Sujith Pandel <sujith_pandel@dell.com>
Tested-by: Sujith Pandel <sujith_pandel@dell.com>
Reviewed-by: Vishal Verma <vishal.l.verma@intel.com>
Reviewed-by: Jeff Moyer <jmoyer@redhat.com>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
In preparation for using function number 0 as an error value, prevent it
from being considered a valid function value by acpi_nfit_ctl().
Cc: <stable@vger.kernel.org>
Cc: stuart hayes <stuart.w.hayes@gmail.com>
Fixes: e02fb7264d ("nfit: add Microsoft NVDIMM DSM command set...")
Reported-by: Jeff Moyer <jmoyer@redhat.com>
Reviewed-by: Jeff Moyer <jmoyer@redhat.com>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
The following warning:
ACPI0012:00: security event setup failed: -19
...is meant to capture exceptional failures of sysfs_get_dirent(),
however it will also fail in the common case when security support is
disabled. A few issues:
1/ A dev_warn() report for a common case is too chatty
2/ The setup of this notifier is generic, no need for it to be driven
from the nfit driver, it can exist completely in the core.
3/ If it fails for any reason besides security support being disabled,
that's fatal and should abort DIMM activation. Userspace may hang if
it never gets overwrite notifications.
4/ The dirent needs to be released.
Move the call to the core 'dimm' driver, make it conditional on security
support being active, make it fatal for the exceptional case, add the
missing sysfs_put() at device disable time.
Fixes: 7d988097c5 ("...Add security DSM overwrite support")
Reviewed-by: Dave Jiang <dave.jiang@intel.com>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
The override status function needs to be updated to use the proper
request parameter in order to get the security state.
Fixes: 3c13e2ac74 ("...Add test support for Intel nvdimm security DSMs")
Reported-by: Vishal Verma <vishal.l.verma@intel.com>
Signed-off-by: Dave Jiang <dave.jiang@intel.com>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Some tty line disciplines do not have a receive buf callback, so
properly check for that before calling it. If they do not have this
callback, just eat the character quietly, as we can't fail this call.
Reported-by: Jann Horn <jannh@google.com>
Cc: stable <stable@vger.kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
The risk of redundant IO accounting was not taken into consideration
when commit 18a25da843 ("dm: ensure bio submission follows a
depth-first tree walk") introduced IO splitting in terms of recursion
via generic_make_request().
Fix this by subtracting the split bio's payload from the IO stats that
were already accounted for by start_io_acct() upon dm_make_request()
entry. This repeat oscillation of the IO accounting, up then down,
isn't ideal but refactoring DM core's IO splitting to pre-split bios
_before_ they are accounted turned out to be an excessive amount of
change that will need a full development cycle to refine and verify.
Before this fix:
/dev/mapper/stripe_dev is a 4-way stripe using a 32k chunksize, so
bios are split on 32k boundaries.
# fio --name=16M --filename=/dev/mapper/stripe_dev --rw=write --bs=64k --size=16M \
--iodepth=1 --ioengine=libaio --direct=1 --refill_buffers
with debugging added:
[103898.310264] device-mapper: core: start_io_acct: dm-2 WRITE bio->bi_iter.bi_sector=0 len=128
[103898.318704] device-mapper: core: __split_and_process_bio: recursing for following split bio:
[103898.329136] device-mapper: core: start_io_acct: dm-2 WRITE bio->bi_iter.bi_sector=64 len=64
...
16M written yet 136M (278528 * 512b) accounted:
# cat /sys/block/dm-2/stat | awk '{ print $7 }'
278528
After this fix:
16M written and 16M (32768 * 512b) accounted:
# cat /sys/block/dm-2/stat | awk '{ print $7 }'
32768
Fixes: 18a25da843 ("dm: ensure bio submission follows a depth-first tree walk")
Cc: stable@vger.kernel.org # 4.16+
Reported-by: Bryan Gurney <bgurney@redhat.com>
Reviewed-by: Ming Lei <ming.lei@redhat.com>
Signed-off-by: Mike Snitzer <snitzer@redhat.com>
DM's clone_bio() now benefits from using bio_trim() by fixing the fact
that clone_bio() wasn't clearing BIO_SEG_VALID like bio_trim() does;
which triggers blk_recount_segments() via bio_phys_segments().
Reviewed-by: Ming Lei <ming.lei@redhat.com>
Signed-off-by: Mike Snitzer <snitzer@redhat.com>
Support speaker and mic mute LEDs on HP ProBook 470 G5.
BugLink: https://bugs.launchpad.net/bugs/1811254
Signed-off-by: Anthony Wong <anthony.wong@canonical.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
While updating perf to work with Python3 and Python2 I noticed that the
stat-cpi script was dumping core.
$ perf stat -e cycles,instructions record -o /tmp/perf.data /bin/false
Performance counter stats for '/bin/false':
802,148 cycles
604,622 instructions 802,148 cycles
604,622 instructions
0.001445842 seconds time elapsed
$ perf script -i /tmp/perf.data -s scripts/python/stat-cpi.py
Segmentation fault (core dumped)
...
...
rblist=rblist@entry=0xb2a200 <rt_stat>,
new_entry=new_entry@entry=0x7ffcb755c310) at util/rblist.c:33
ctx=<optimized out>, type=<optimized out>, create=<optimized out>,
cpu=<optimized out>, evsel=<optimized out>) at util/stat-shadow.c:118
ctx=<optimized out>, type=<optimized out>, st=<optimized out>)
at util/stat-shadow.c:196
count=count@entry=727442, cpu=cpu@entry=0, st=0xb2a200 <rt_stat>)
at util/stat-shadow.c:239
config=config@entry=0xafeb40 <stat_config>,
counter=counter@entry=0x133c6e0) at util/stat.c:372
...
...
The issue is that since 1fcd03946b perf_stat__update_shadow_stats now calls
update_runtime_stat passing rt_stat rather than calling update_stats but
perf_stat__init_shadow_stats has never been called to initialize rt_stat in
the script path processing recorded stat data.
Since I can't see any reason why perf_stat__init_shadow_stats() is presently
initialized like it is in builtin-script.c::perf_sample__fprint_metric()
[4bd1bef8bb] I'm proposing it instead be initialized once in __cmd_script
Committer testing:
After applying the patch:
# perf script -i /tmp/perf.data -s tools/perf/scripts/python/stat-cpi.py
0.001970: cpu -1, thread -1 -> cpi 1.709079 (1075684/629394)
#
No segfault.
Signed-off-by: Tony Jones <tonyj@suse.de>
Reviewed-by: Jiri Olsa <jolsa@kernel.org>
Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Tested-by: Ravi Bangoria <ravi.bangoria@linux.ibm.com>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Jin Yao <yao.jin@linux.intel.com>
Fixes: 1fcd03946b ("perf stat: Update per-thread shadow stats")
Link: http://lkml.kernel.org/r/20190120191414.12925-1-tonyj@suse.de
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
The annotation line percentage is compared and inserted into the rbtree,
but the percent field of 'struct annotation_data' is an array, the
comparison result between them is the address difference.
This patch compares the right slot of percent array according to
opts->percent_type and makes things right.
The problem can be reproduced by pressing 'H' in perf top annotation view.
It should highlight the instruction line which has the highest sampling
percentage.
Signed-off-by: He Kuang <hekuang@huawei.com>
Reviewed-by: Jiri Olsa <jolsa@kernel.org>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/20190120160523.4391-1-hekuang@huawei.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
This patch fixes an issue in cpumap.c when used with the TOPOLOGY
header. In some configurations, some NUMA nodes may have no CPU (empty
cpulist). Yet a cpumap map must be created otherwise perf abort with an
error. This patch handles this case by creating a dummy map.
Before:
$ perf record -o - -e cycles noploop 2 | perf script -i -
0x6e8 [0x6c]: failed to process type: 80
After:
$ perf record -o - -e cycles noploop 2 | perf script -i -
noploop for 2 seconds
Signed-off-by: Stephane Eranian <eranian@google.com>
Acked-by: Jiri Olsa <jolsa@kernel.org>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Kan Liang <kan.liang@linux.intel.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/1547885559-1657-1-git-send-email-eranian@google.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Precise and non-ambiguous license information is important. The recently
added quota.c file has a SPDX license identifier, which is nice, but
at the same time it has a contradictionary license boiler plate text.
SPDX-License-Identifier: GPL-2.0
versus
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
Oh well.
As the other ceph related files are licensed under the GPL v2 only, it's
assumed that the SPDX id is correct and the boiler plate was randomly
copied into that patch.
Remove the boiler plate as it is wrong and even if correct it is redundant.
Fixes: fb18a57568 ("ceph: quota: add initial infrastructure to support cephfs quotas")
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: Luis Henriques <lhenriques@suse.com>
Cc: Jiri Kosina <jkosina@suse.cz>
Cc: "Yan, Zheng" <zyan@redhat.com>
Cc: Sage Weil <sage@redhat.com>
Cc: Ilya Dryomov <idryomov@gmail.com>
Cc: ceph-devel@vger.kernel.org
Acked-by: Luis Henriques <lhenriques@suse.com>
Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
con_fault() can transition the connection into STANDBY right after
ceph_con_keepalive() clears STANDBY in clear_standby():
libceph user thread ceph-msgr worker
ceph_con_keepalive()
mutex_lock(&con->mutex)
clear_standby(con)
mutex_unlock(&con->mutex)
mutex_lock(&con->mutex)
con_fault()
...
if KEEPALIVE_PENDING isn't set
set state to STANDBY
...
mutex_unlock(&con->mutex)
set KEEPALIVE_PENDING
set WRITE_PENDING
This triggers warnings in clear_standby() when either ceph_con_send()
or ceph_con_keepalive() get to clearing STANDBY next time.
I don't see a reason to condition queue_con() call on the previous
value of KEEPALIVE_PENDING, so move the setting of KEEPALIVE_PENDING
into the critical section -- unlike WRITE_PENDING, KEEPALIVE_PENDING
could have been a non-atomic flag.
Reported-by: syzbot+acdeb633f6211ccdf886@syzkaller.appspotmail.com
Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
Tested-by: Myungho Jung <mhjungk@gmail.com>
snap realm and corresponding inode have pointers to each other.
The two pointer should get clear at the same time. Otherwise,
snap realm's pointer may reference freed inode.
Cc: stable@vger.kernel.org # 4.17+
Signed-off-by: "Yan, Zheng" <zyan@redhat.com>
Reviewed-by: Luis Henriques <lhenriques@suse.com>
Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
Fixes issue created by 9b3e420766.
It wasn't possible for one_regmap_config to be non-NULL at the point
it was tested for mcp23s18 devices.
Applied the same pattern of allocating one_regmap_config using
devm_kmemdump() and then initializing the local regmap structure
from that.
Signed-off-by: Jason Kridner <jdk@ti.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Well, hopefully 3rd time is a charm. We tried making that check
DMI_BIOS_VERSION and DMI_BOARD_VERSION, but the real one is
DMI_PRODUCT_VERSION.
Fixes: 86c5dd6860 ("pinctrl: cherryview: limit Strago DMI workarounds to version 1.0")
Bugzilla: https://bugzilla.kernel.org/show_bug.cgi?id=197953
Bugzilla: https://bugzilla.redhat.com/show_bug.cgi?id=1631930
Cc: stable@vger.kernel.org
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Acked-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
