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* Two fixes for drivers that control the mapping of BMC memory over
PCIe and LPC
* Re-enable FWH2AHB on systems that have it closed off by default
* A new id for the AST2625, an AST2600 variant
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Merge tag 'aspeed-5.15-soc' of git://git.kernel.org/pub/scm/linux/kernel/git/joel/bmc into arm/soc
ASPEED soc updates for 5.15
* Two fixes for drivers that control the mapping of BMC memory over
PCIe and LPC
* Re-enable FWH2AHB on systems that have it closed off by default
* A new id for the AST2625, an AST2600 variant
* tag 'aspeed-5.15-soc' of git://git.kernel.org/pub/scm/linux/kernel/git/joel/bmc:
soc: aspeed: Re-enable FWH2AHB on AST2600
soc: aspeed: socinfo: Add AST2625 variant
soc: aspeed: p2a-ctrl: Fix boundary check for mmap
soc: aspeed: lpc-ctrl: Fix boundary check for mmap
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Recent builds of the vendor u-boot tree disable features of the
BMC that may allow unwanted access if not correctly configured. This
includes the firmware hub to ahb bridge (FWH2AHB), which is used by this
driver.
The bit to "un-disable" it is in the SCU. Set it only when the ioctl is
called and we are running on the ast2600, as to not open up the
'backdoor' unless there's userspace trying to use it.
Fixes: deb50313ba83 ("soc: aspeed-lpc-ctrl: LPC to AHB mapping on ast2600")
Link: https://lore.kernel.org/r/20210629073520.318514-2-joel@jms.id.au
Signed-off-by: Joel Stanley <joel@jms.id.au>
Add AST26XX series AST2625-A3 SOC ID, taken from the vendor u-boot SDK:
arch/arm/mach-aspeed/ast2600/scu_info.c
+ SOC_ID("AST2625-A3", 0x0503040305030403),
Reviewed-by: Dylan Hung <dylan_hung@aspeedtech.com>
Link: https://lore.kernel.org/r/20210818010534.2508122-1-joel@jms.id.au
Signed-off-by: Joel Stanley <joel@jms.id.au>
- NSLU2
- NAS100D
- D-Link DSM-G600
- Omicron
- Gateway WG302v2
- Arcom Vulcan
- Avila
- Intel reference designs
- Coyote and IXDPG425
- GTW5715
- Freecom FSG-3
In each case except Omicron, the board has been replaced by
a corresponding device tree and tested where someone
volunteered: Marc Zyngier has tested Arcom Vulcan and Freecom
FSG-3 and I have tested NSLU2 and Avila for example. All
that were tested boot to prompt, some devices may need some
more massage before working perfectly.
We can just as well delete these board files because we are
confident that we will fix them to a working state if people
are able to test patches.
I am holding back the following boards for now:
- Gateway 7001 - because Zoltan is working on this board and
needs more time. He might need to test things with the board
file so let's allow him time for that.
- Goramo MLR - the consensus is to replace this with a dry
coded device tree, but the bindings for that tree need some
more time to make so we keep the boardfile around until
we can merge a complete device tree for it.
After these two (target v5.16) we can delete the remaining
board files and the old mach structure along with the old PCI
driver.
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Merge tag 'ixp4xx-del-boardfiles-v5.15' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-nomadik into arm/soc
This deletes the following IXP4xx boardfiles:
- NSLU2
- NAS100D
- D-Link DSM-G600
- Omicron
- Gateway WG302v2
- Arcom Vulcan
- Avila
- Intel reference designs
- Coyote and IXDPG425
- GTW5715
- Freecom FSG-3
In each case except Omicron, the board has been replaced by
a corresponding device tree and tested where someone
volunteered: Marc Zyngier has tested Arcom Vulcan and Freecom
FSG-3 and I have tested NSLU2 and Avila for example. All
that were tested boot to prompt, some devices may need some
more massage before working perfectly.
We can just as well delete these board files because we are
confident that we will fix them to a working state if people
are able to test patches.
I am holding back the following boards for now:
- Gateway 7001 - because Zoltan is working on this board and
needs more time. He might need to test things with the board
file so let's allow him time for that.
- Goramo MLR - the consensus is to replace this with a dry
coded device tree, but the bindings for that tree need some
more time to make so we keep the boardfile around until
we can merge a complete device tree for it.
After these two (target v5.16) we can delete the remaining
board files and the old mach structure along with the old PCI
driver.
* tag 'ixp4xx-del-boardfiles-v5.15' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-nomadik:
ARM: ixp4xx: Delete the Freecom FSG-3 boardfiles
ARM: ixp4xx: Delete GTWX5715 board files
ARM: ixp4xx: Delete Coyote and IXDPG425 boardfiles
ARM: ixp4xx: Delete Intel reference design boardfiles
ARM: ixp4xx: Delete Avila boardfiles
ARM: ixp4xx: Delete the Arcom Vulcan boardfiles
ARM: ixp4xx: Delete Gateway WG302v2 boardfiles
ARM: ixp4xx: Delete Omicron boardfiles
ARM: ixp4xx: Delete the D-Link DSM-G600 boardfiles
ARM: ixp4xx: Delete NAS100D boardfiles
ARM: ixp4xx: Delete NSLU2 boardfiles
Link: https://lore.kernel.org/r/CACRpkdY=sPDkzmbmm+0UQnJi7BXZKH14GLmyVwKC+4cLCJpmdA@mail.gmail.com
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
The check mixes pages (vm_pgoff) with bytes (vm_start, vm_end) on one
side of the comparison, and uses resource address (rather than just the
resource size) on the other side of the comparison.
This can allow malicious userspace to easily bypass the boundary check and
map pages that are located outside memory-region reserved by the driver.
Fixes: 01c60dcea9 ("drivers/misc: Add Aspeed P2A control driver")
Cc: stable@vger.kernel.org
Signed-off-by: Iwona Winiarska <iwona.winiarska@intel.com>
Reviewed-by: Andrew Jeffery <andrew@aj.id.au>
Tested-by: Andrew Jeffery <andrew@aj.id.au>
Reviewed-by: Joel Stanley <joel@aj.id.au>
Signed-off-by: Joel Stanley <joel@jms.id.au>
The check mixes pages (vm_pgoff) with bytes (vm_start, vm_end) on one
side of the comparison, and uses resource address (rather than just the
resource size) on the other side of the comparison.
This can allow malicious userspace to easily bypass the boundary check and
map pages that are located outside memory-region reserved by the driver.
Fixes: 6c4e976785 ("drivers/misc: Add Aspeed LPC control driver")
Cc: stable@vger.kernel.org
Signed-off-by: Iwona Winiarska <iwona.winiarska@intel.com>
Reviewed-by: Andrew Jeffery <andrew@aj.id.au>
Tested-by: Andrew Jeffery <andrew@aj.id.au>
Reviewed-by: Joel Stanley <joel@aj.id.au>
Signed-off-by: Joel Stanley <joel@jms.id.au>
This board is replaced with the corresponding device tree.
Acked-by: Marc Zyngier <maz@kernel.org>
Tested-by: Marc Zyngier <maz@kernel.org>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
These boards are replaced with the corresponding device trees.
Cc: Deepak Saxena <dsaxena@plexity.net>
Cc: Vladimir Barinov <vladimir.barinov@cogentembedded.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
This board is replaced with the corresponding device tree.
There is also the "loft" board which is just a Kconfi entry
and which reuses the same boardfile.
If there is interest in the Loft variant and someone is willing
to test I can create a special DT superset for this board,
which only differs in PCI set-up.
Cc: Michael-Luke Jones <mlj28@cam.ac.uk>
Cc: Deepak Saxena <dsaxena@plexity.net>
Cc: Tom Billman <kernel@giantshoulderinc.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
These boards are reported obsoleted by the manufacturer and no
known community users exist.
Cc: Richard Cochran <richardcochran@gmail.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
This board is replaced with the corresponding device tree.
Cc: Michael-Luke Jones <mlj28@cam.ac.uk>
Cc: Rod Whitby <rod@whitby.id.au>
Cc: Alessandro Zummo <a.zummo@towertech.it>
Cc: Michael Westerhof <mwester@dls.net>
Cc: Deepak Saxena <dsaxena@plexity.net>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
The NAS100D is now completely migrated to use device tree exclusively
so delete the boardfiles.
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
I managed to miss applying two out of three Kconfig changes earlier
to drop unused entries, here are the missed changes.
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Merge tag 'omap-for-v5.15/soc-late-signed' of git://git.kernel.org/pub/scm/linux/kernel/git/tmlind/linux-omap into arm/soc
Two missed SoC changes for omaps for v5.15
I managed to miss applying two out of three Kconfig changes earlier
to drop unused entries, here are the missed changes.
* tag 'omap-for-v5.15/soc-late-signed' of git://git.kernel.org/pub/scm/linux/kernel/git/tmlind/linux-omap:
arm: omap2: Drop the unused OMAP_PACKAGE_* KConfig entries
arm: omap2: Drop obsolete MACH_OMAP3_PANDORA entry
Link: https://lore.kernel.org/r/pull-1628751694-126144@atomide.com
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
The OMAP_PACKAGE_* Kconfig entries are no longer referenced
in the kernel so can be dropped as they're obsolete.
Signed-off-by: Peter Robinson <pbrobinson@gmail.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>
The MACH_OMAP3_PANDORA is no longer referenced anywhere in the kernel
options so it can now be dropped as the board has long moved to DT.
Signed-off-by: Peter Robinson <pbrobinson@gmail.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>
- add new SoC based on a Cortex-A7 core: the SAMA7G5 family
- mach-at91 entry, Kconfig and header files
- Power Management Controller (PMC) code and associated power management
changes. Support for suspend/resume, Ultra Low Power modes and
Backup with Memory in Self-Refresh mode.
- Power management association with DDR controller and
shutdown controller for addressing this variety of modes.
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Merge tag 'at91-soc-5.15' of git://git.kernel.org/pub/scm/linux/kernel/git/at91/linux into arm/soc
AT91 soc for 5.15:
- add new SoC based on a Cortex-A7 core: the SAMA7G5 family
- mach-at91 entry, Kconfig and header files
- Power Management Controller (PMC) code and associated power management
changes. Support for suspend/resume, Ultra Low Power modes and
Backup with Memory in Self-Refresh mode.
- Power management association with DDR controller and
shutdown controller for addressing this variety of modes.
* tag 'at91-soc-5.15' of git://git.kernel.org/pub/scm/linux/kernel/git/at91/linux: (26 commits)
ARM: at91: pm: add sama7g5 shdwc
ARM: at91: pm: add pm support for SAMA7G5
ARM: at91: sama7: introduce sama7 SoC family
ARM: at91: pm: add sama7g5's pmc
ARM: at91: pm: add backup mode support for SAMA7G5
ARM: at91: pm: save ddr phy calibration data to securam
ARM: at91: pm: add sama7g5 ddr phy controller
ARM: at91: pm: add sama7g5 ddr controller
ARM: at91: pm: wait for ddr power mode off
ARM: at91: pm: add support for 2.5V LDO regulator control
ARM: at91: pm: add support for MCK1..4 save/restore for ulp modes
ARM: at91: pm: add self-refresh support for sama7g5
ARM: at91: ddr: add registers definitions for sama7g5's ddr
ARM: at91: sfrbu: add sfrbu registers definitions for sama7g5
ARM: at91: pm: add support for waiting MCK1..4
ARM: at91: pm: s/CONFIG_SOC_SAM9X60/CONFIG_HAVE_AT91_SAM9X60_PLL/g
ARM: at91: pm: avoid push and pop on stack while memory is in self-refersh
ARM: at91: pm: use r7 instead of tmp1
ARM: at91: pm: do not initialize pdev
ARM: at91: pm: check for different controllers in at91_pm_modes_init()
...
Link: https://lore.kernel.org/r/20210804084316.12641-1-nicolas.ferre@microchip.com
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
The MaverickCrunch support for ep93xx never made it into glibc and
was removed from gcc in its 4.8 release in 2012. It is now one of
the last parts of arch/arm/ that fails to build with the clang
integrated assembler, which is unlikely to ever want to support it.
The two alternatives are to force the use of binutils/gas when
building the crunch support, or to remove it entirely.
According to Hartley Sweeten:
"Martin Guy did a lot of work trying to get the maverick crunch working
but I was never able to successfully use it for anything. It "kind"
of works but depending on the EP93xx silicon revision there are still
a number of hardware bugs that either give imprecise or garbage results.
I have no problem with removing the kernel support for the maverick
crunch."
Unless someone else comes up with a good reason to keep it around,
remove it now. This touches mostly the ep93xx platform, but removes
a bit of code from ARM common ptrace and signal frame handling as well.
If there are remaining users of MaverickCrunch, they can use LTS
kernels for at least another five years before kernel support ends.
Link: https://lore.kernel.org/linux-arm-kernel/20210802141245.1146772-1-arnd@kernel.org/
Link: https://lore.kernel.org/linux-arm-kernel/20210226164345.3889993-1-arnd@kernel.org/
Link: https://github.com/ClangBuiltLinux/linux/issues/1272
Link: https://gcc.gnu.org/legacy-ml/gcc/2008-03/msg01063.html
Cc: "Martin Guy" <martinwguy@martinwguy@gmail.com>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
- Revert "perf map: Fix dso->nsinfo refcounting", this makes 'perf top' to
abort, uncovering a design flaw on how namespace information is kept, the
fix is more than we can do right now, leave it for the next merge window.
- Split --dump-raw-trace by AUX records for ARM's CoreSight, fixing up the
decoding of some records.
- Fix PMU alias matching.
Thanks to James Clark and John Garry for these fixes.
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
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Merge tag 'perf-tools-fixes-for-v5.14-2021-08-01' of git://git.kernel.org/pub/scm/linux/kernel/git/acme/linux
Pull perf tools fixes from Arnaldo Carvalho de Melo:
- Revert "perf map: Fix dso->nsinfo refcounting", this makes 'perf top'
abort, uncovering a design flaw on how namespace information is kept.
The fix for that is more than we can do right now, leave it for the
next merge window.
- Split --dump-raw-trace by AUX records for ARM's CoreSight, fixing up
the decoding of some records.
- Fix PMU alias matching.
Thanks to James Clark and John Garry for these fixes.
* tag 'perf-tools-fixes-for-v5.14-2021-08-01' of git://git.kernel.org/pub/scm/linux/kernel/git/acme/linux:
Revert "perf map: Fix dso->nsinfo refcounting"
perf pmu: Fix alias matching
perf cs-etm: Split --dump-raw-trace by AUX records
- Don't use r30 in VDSO code, to avoid breaking existing Go lang programs.
- Change an export symbol to allow non-GPL modules to use spinlocks again.
Thanks to: Paul Menzel, Srikar Dronamraju.
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Merge tag 'powerpc-5.14-4' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux
Pull powerpc fixes from Michael Ellerman:
- Don't use r30 in VDSO code, to avoid breaking existing Go lang
programs.
- Change an export symbol to allow non-GPL modules to use spinlocks
again.
Thanks to Paul Menzel, and Srikar Dronamraju.
* tag 'powerpc-5.14-4' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux:
powerpc/vdso: Don't use r30 to avoid breaking Go lang
powerpc/pseries: Fix regression while building external modules
* Fix a number of coordination bugs relating to cache flushes for
metadata writeback, cache flushes for multi-buffer log writes, and
FUA writes for single-buffer log writes.
* Fix a bug with incorrect replay of attr3 blocks.
* Fix unnecessary stalls when flushing logs to disk.
* Fix spoofing problems when recovering realtime bitmap blocks.
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Merge tag 'xfs-5.14-fixes-2' of git://git.kernel.org/pub/scm/fs/xfs/xfs-linux
Pull xfs fixes from Darrick Wong:
"This contains a bunch of bug fixes in XFS.
Dave and I have been busy the last couple of weeks to find and fix as
many log recovery bugs as we can find; here are the results so far. Go
fstests -g recoveryloop! ;)
- Fix a number of coordination bugs relating to cache flushes for
metadata writeback, cache flushes for multi-buffer log writes, and
FUA writes for single-buffer log writes
- Fix a bug with incorrect replay of attr3 blocks
- Fix unnecessary stalls when flushing logs to disk
- Fix spoofing problems when recovering realtime bitmap blocks"
* tag 'xfs-5.14-fixes-2' of git://git.kernel.org/pub/scm/fs/xfs/xfs-linux:
xfs: prevent spoofing of rtbitmap blocks when recovering buffers
xfs: limit iclog tail updates
xfs: need to see iclog flags in tracing
xfs: Enforce attr3 buffer recovery order
xfs: logging the on disk inode LSN can make it go backwards
xfs: avoid unnecessary waits in xfs_log_force_lsn()
xfs: log forces imply data device cache flushes
xfs: factor out forced iclog flushes
xfs: fix ordering violation between cache flushes and tail updates
xfs: fold __xlog_state_release_iclog into xlog_state_release_iclog
xfs: external logs need to flush data device
xfs: flush data dev on external log write
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Merge tag '5.14-rc3-smb3-fixes' of git://git.samba.org/sfrench/cifs-2.6
Pull cifs fixes from Steve French:
"Three cifs/smb3 fixes, including two for stable, and a fix for an
fallocate problem noticed by Clang"
* tag '5.14-rc3-smb3-fixes' of git://git.samba.org/sfrench/cifs-2.6:
cifs: add missing parsing of backupuid
smb3: rc uninitialized in one fallocate path
SMB3: fix readpage for large swap cache
and netfilter trees.
Current release - regressions:
- mac80211: fix starting aggregation sessions on mesh interfaces
Current release - new code bugs:
- sctp: send pmtu probe only if packet loss in Search Complete state
- bnxt_en: add missing periodic PHC overflow check
- devlink: fix phys_port_name of virtual port and merge error
- hns3: change the method of obtaining default ptp cycle
- can: mcba_usb_start(): add missing urb->transfer_dma initialization
Previous releases - regressions:
- set true network header for ECN decapsulation
- mlx5e: RX, avoid possible data corruption w/ relaxed ordering and LRO
- phy: re-add check for PHY_BRCM_DIS_TXCRXC_NOENRGY on the BCM54811 PHY
- sctp: fix return value check in __sctp_rcv_asconf_lookup
Previous releases - always broken:
- bpf:
- more spectre corner case fixes, introduce a BPF nospec
instruction for mitigating Spectre v4
- fix OOB read when printing XDP link fdinfo
- sockmap: fix cleanup related races
- mac80211: fix enabling 4-address mode on a sta vif after assoc
- can:
- raw: raw_setsockopt(): fix raw_rcv panic for sock UAF
- j1939: j1939_session_deactivate(): clarify lifetime of
session object, avoid UAF
- fix number of identical memory leaks in USB drivers
- tipc:
- do not blindly write skb_shinfo frags when doing decryption
- fix sleeping in tipc accept routine
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
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Merge tag 'net-5.14-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net
Pull networking fixes from Jakub Kicinski:
"Networking fixes for 5.14-rc4, including fixes from bpf, can, WiFi
(mac80211) and netfilter trees.
Current release - regressions:
- mac80211: fix starting aggregation sessions on mesh interfaces
Current release - new code bugs:
- sctp: send pmtu probe only if packet loss in Search Complete state
- bnxt_en: add missing periodic PHC overflow check
- devlink: fix phys_port_name of virtual port and merge error
- hns3: change the method of obtaining default ptp cycle
- can: mcba_usb_start(): add missing urb->transfer_dma initialization
Previous releases - regressions:
- set true network header for ECN decapsulation
- mlx5e: RX, avoid possible data corruption w/ relaxed ordering and
LRO
- phy: re-add check for PHY_BRCM_DIS_TXCRXC_NOENRGY on the BCM54811
PHY
- sctp: fix return value check in __sctp_rcv_asconf_lookup
Previous releases - always broken:
- bpf:
- more spectre corner case fixes, introduce a BPF nospec
instruction for mitigating Spectre v4
- fix OOB read when printing XDP link fdinfo
- sockmap: fix cleanup related races
- mac80211: fix enabling 4-address mode on a sta vif after assoc
- can:
- raw: raw_setsockopt(): fix raw_rcv panic for sock UAF
- j1939: j1939_session_deactivate(): clarify lifetime of session
object, avoid UAF
- fix number of identical memory leaks in USB drivers
- tipc:
- do not blindly write skb_shinfo frags when doing decryption
- fix sleeping in tipc accept routine"
* tag 'net-5.14-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net: (91 commits)
gve: Update MAINTAINERS list
can: esd_usb2: fix memory leak
can: ems_usb: fix memory leak
can: usb_8dev: fix memory leak
can: mcba_usb_start(): add missing urb->transfer_dma initialization
can: hi311x: fix a signedness bug in hi3110_cmd()
MAINTAINERS: add Yasushi SHOJI as reviewer for the Microchip CAN BUS Analyzer Tool driver
bpf: Fix leakage due to insufficient speculative store bypass mitigation
bpf: Introduce BPF nospec instruction for mitigating Spectre v4
sis900: Fix missing pci_disable_device() in probe and remove
net: let flow have same hash in two directions
nfc: nfcsim: fix use after free during module unload
tulip: windbond-840: Fix missing pci_disable_device() in probe and remove
sctp: fix return value check in __sctp_rcv_asconf_lookup
nfc: s3fwrn5: fix undefined parameter values in dev_err()
net/mlx5: Fix mlx5_vport_tbl_attr chain from u16 to u32
net/mlx5e: Fix nullptr in mlx5e_hairpin_get_mdev()
net/mlx5: Unload device upon firmware fatal error
net/mlx5e: Fix page allocation failure for ptp-RQ over SF
net/mlx5e: Fix page allocation failure for trap-RQ over SF
...
- Revert recent change of the ACPI IRQ resources handling that
attempted to improve the ACPI IRQ override selection logic, but
introduced serious regressions on some systems (Hui Wang).
- Fix up quirks for AMD platforms in the suspend-to-idle support
code so as to take upcoming systems using uPEP HID AMDI007 into
account as appropriate (Mario Limonciello).
- Fix the code retrieving DPTF attributes of the PCH FIVR so that
it agrees on the return data type with the ACPI control method
evaluated for this purpose (Srinivas Pandruvada).
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Merge tag 'acpi-5.14-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm
Pull ACPI fixes from Rafael Wysocki:
"These revert a recent IRQ resources handling modification that turned
out to be problematic, fix suspend-to-idle handling on AMD platforms
to take upcoming systems into account properly and fix the retrieval
of the DPTF attributes of the PCH FIVR.
Specifics:
- Revert recent change of the ACPI IRQ resources handling that
attempted to improve the ACPI IRQ override selection logic, but
introduced serious regressions on some systems (Hui Wang).
- Fix up quirks for AMD platforms in the suspend-to-idle support code
so as to take upcoming systems using uPEP HID AMDI007 into account
as appropriate (Mario Limonciello).
- Fix the code retrieving DPTF attributes of the PCH FIVR so that it
agrees on the return data type with the ACPI control method
evaluated for this purpose (Srinivas Pandruvada)"
* tag 'acpi-5.14-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm:
ACPI: DPTF: Fix reading of attributes
Revert "ACPI: resources: Add checks for ACPI IRQ override"
ACPI: PM: Add support for upcoming AMD uPEP HID AMDI007
Since commit 1b6b26ae70 ("pipe: fix and clarify pipe write wakeup
logic") we have sanitized the pipe write logic, and would only try to
wake up readers if they needed it.
In particular, if the pipe already had data in it before the write,
there was no point in trying to wake up a reader, since any existing
readers must have been aware of the pre-existing data already. Doing
extraneous wakeups will only cause potential thundering herd problems.
However, it turns out that some Android libraries have misused the EPOLL
interface, and expected "edge triggered" be to "any new write will
trigger it". Even if there was no edge in sight.
Quoting Sandeep Patil:
"The commit 1b6b26ae70 ('pipe: fix and clarify pipe write wakeup
logic') changed pipe write logic to wakeup readers only if the pipe
was empty at the time of write. However, there are libraries that
relied upon the older behavior for notification scheme similar to
what's described in [1]
One such library 'realm-core'[2] is used by numerous Android
applications. The library uses a similar notification mechanism as GNU
Make but it never drains the pipe until it is full. When Android moved
to v5.10 kernel, all applications using this library stopped working.
The library has since been fixed[3] but it will be a while before all
applications incorporate the updated library"
Our regression rule for the kernel is that if applications break from
new behavior, it's a regression, even if it was because the application
did something patently wrong. Also note the original report [4] by
Michal Kerrisk about a test for this epoll behavior - but at that point
we didn't know of any actual broken use case.
So add the extraneous wakeup, to approximate the old behavior.
[ I say "approximate", because the exact old behavior was to do a wakeup
not for each write(), but for each pipe buffer chunk that was filled
in. The behavior introduced by this change is not that - this is just
"every write will cause a wakeup, whether necessary or not", which
seems to be sufficient for the broken library use. ]
It's worth noting that this adds the extraneous wakeup only for the
write side, while the read side still considers the "edge" to be purely
about reading enough from the pipe to allow further writes.
See commit f467a6a664 ("pipe: fix and clarify pipe read wakeup logic")
for the pipe read case, which remains that "only wake up if the pipe was
full, and we read something from it".
Link: https://lore.kernel.org/lkml/CAHk-=wjeG0q1vgzu4iJhW5juPkTsjTYmiqiMUYAebWW+0bam6w@mail.gmail.com/ [1]
Link: https://github.com/realm/realm-core [2]
Link: https://github.com/realm/realm-core/issues/4666 [3]
Link: https://lore.kernel.org/lkml/CAKgNAkjMBGeAwF=2MKK758BhxvW58wYTgYKB2V-gY1PwXxrH+Q@mail.gmail.com/ [4]
Link: https://lore.kernel.org/lkml/20210729222635.2937453-1-sspatil@android.com/
Reported-by: Sandeep Patil <sspatil@android.com>
Cc: Michael Kerrisk <mtk.manpages@gmail.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This makes 'perf top' abort in some cases, and the right fix will
involve surgery that is too much to do at this stage, so revert for now
and fix it in the next merge window.
This reverts commit 2d6b74baa7.
Cc: Riccardo Mancini <rickyman7@gmail.com>
Cc: Ian Rogers <irogers@google.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Krister Johansen <kjlx@templeofstupid.com>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
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Merge tag 'block-5.14-2021-07-30' of git://git.kernel.dk/linux-block
Pull block fixes from Jens Axboe:
- gendisk freeing fix (Christoph)
- blk-iocost wake ordering fix (Tejun)
- tag allocation error handling fix (John)
- loop locking fix. While this isn't the prettiest fix in the world,
nobody has any good alternatives for 5.14. Something to likely
revisit for 5.15. (Tetsuo)
* tag 'block-5.14-2021-07-30' of git://git.kernel.dk/linux-block:
block: delay freeing the gendisk
blk-iocost: fix operation ordering in iocg_wake_fn()
blk-mq-sched: Fix blk_mq_sched_alloc_tags() error handling
loop: reintroduce global lock for safe loop_validate_file() traversal
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Merge tag 'libata-5.14-2021-07-30' of git://git.kernel.dk/linux-block
Pull libata fixlets from Jens Axboe:
- A fix for PIO highmem (Christoph)
- Kill HAVE_IDE as it's now unused (Lukas)
* tag 'libata-5.14-2021-07-30' of git://git.kernel.dk/linux-block:
arch: Kconfig: clean up obsolete use of HAVE_IDE
libata: fix ata_pio_sector for CONFIG_HIGHMEM
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Merge tag 'for-5.14-rc3-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/kdave/linux
Pull btrfs fixes from David Sterba:
- fix -Warray-bounds warning, to help external patchset to make it
default treewide
- fix writeable device accounting (syzbot report)
- fix fsync and log replay after a rename and inode eviction
- fix potentially lost error code when submitting multiple bios for
compressed range
* tag 'for-5.14-rc3-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/kdave/linux:
btrfs: calculate number of eb pages properly in csum_tree_block
btrfs: fix rw device counting in __btrfs_free_extra_devids
btrfs: fix lost inode on log replay after mix of fsync, rename and inode eviction
btrfs: mark compressed range uptodate only if all bio succeed
Pull HID fixes from Jiri Kosina:
- resume timing fix for intel-ish driver (Ye Xiang)
- fix for using incorrect MMIO register in amd_sfh driver (Dylan
MacKenzie)
- Cintiq 24HDT / 27QHDT regression fix and touch processing fix for
Wacom driver (Jason Gerecke)
- device removal bugfix for ft260 driver (Michael Zaidman)
- other small assorted fixes
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/hid/hid:
HID: ft260: fix device removal due to USB disconnect
HID: wacom: Skip processing of touches with negative slot values
HID: wacom: Re-enable touch by default for Cintiq 24HDT / 27QHDT
HID: Kconfig: Fix spelling mistake "Uninterruptable" -> "Uninterruptible"
HID: apple: Add support for Keychron K1 wireless keyboard
HID: fix typo in Kconfig
HID: ft260: fix format type warning in ft260_word_show()
HID: amd_sfh: Use correct MMIO register for DMA address
HID: asus: Remove check for same LED brightness on set
HID: intel-ish-hid: use async resume function
Merge misc fixes from Andrew Morton:
"7 patches.
Subsystems affected by this patch series: lib, ocfs2, and mm (slub,
migration, and memcg)"
* emailed patches from Andrew Morton <akpm@linux-foundation.org>:
mm/memcg: fix NULL pointer dereference in memcg_slab_free_hook()
slub: fix unreclaimable slab stat for bulk free
mm/migrate: fix NR_ISOLATED corruption on 64-bit
mm: memcontrol: fix blocking rstat function called from atomic cgroup1 thresholding code
ocfs2: issue zeroout to EOF blocks
ocfs2: fix zero out valid data
lib/test_string.c: move string selftest in the Runtime Testing menu
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Merge tag 'linux-can-fixes-for-5.14-20210730' of git://git.kernel.org/pub/scm/linux/kernel/git/mkl/linux-can
Marc Kleine-Budde says:
====================
pull-request: can 2021-07-30
The first patch is by me and adds Yasushi SHOJI as a reviewer for the
Microchip CAN BUS Analyzer Tool driver.
Dan Carpenter's patch fixes a signedness bug in the hi311x driver.
Pavel Skripkin provides 4 patches, the first targets the mcba_usb
driver by adding the missing urb->transfer_dma initialization, which
was broken in a previous commit. The last 3 patches fix a memory leak
in the usb_8dev, ems_usb and esd_usb2 driver.
* tag 'linux-can-fixes-for-5.14-20210730' of git://git.kernel.org/pub/scm/linux/kernel/git/mkl/linux-can:
can: esd_usb2: fix memory leak
can: ems_usb: fix memory leak
can: usb_8dev: fix memory leak
can: mcba_usb_start(): add missing urb->transfer_dma initialization
can: hi311x: fix a signedness bug in hi3110_cmd()
MAINTAINERS: add Yasushi SHOJI as reviewer for the Microchip CAN BUS Analyzer Tool driver
====================
Link: https://lore.kernel.org/r/20210730070526.1699867-1-mkl@pengutronix.de
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
When I use kfree_rcu() to free a large memory allocated by kmalloc_node(),
the following dump occurs.
BUG: kernel NULL pointer dereference, address: 0000000000000020
[...]
Oops: 0000 [#1] SMP
[...]
Workqueue: events kfree_rcu_work
RIP: 0010:__obj_to_index include/linux/slub_def.h:182 [inline]
RIP: 0010:obj_to_index include/linux/slub_def.h:191 [inline]
RIP: 0010:memcg_slab_free_hook+0x120/0x260 mm/slab.h:363
[...]
Call Trace:
kmem_cache_free_bulk+0x58/0x630 mm/slub.c:3293
kfree_bulk include/linux/slab.h:413 [inline]
kfree_rcu_work+0x1ab/0x200 kernel/rcu/tree.c:3300
process_one_work+0x207/0x530 kernel/workqueue.c:2276
worker_thread+0x320/0x610 kernel/workqueue.c:2422
kthread+0x13d/0x160 kernel/kthread.c:313
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:294
When kmalloc_node() a large memory, page is allocated, not slab, so when
freeing memory via kfree_rcu(), this large memory should not be used by
memcg_slab_free_hook(), because memcg_slab_free_hook() is is used for
slab.
Using page_objcgs_check() instead of page_objcgs() in
memcg_slab_free_hook() to fix this bug.
Link: https://lkml.kernel.org/r/20210728145655.274476-1-wanghai38@huawei.com
Fixes: 270c6a7146 ("mm: memcontrol/slab: Use helpers to access slab page's memcg_data")
Signed-off-by: Wang Hai <wanghai38@huawei.com>
Reviewed-by: Shakeel Butt <shakeelb@google.com>
Acked-by: Michal Hocko <mhocko@suse.com>
Acked-by: Roman Gushchin <guro@fb.com>
Reviewed-by: Kefeng Wang <wangkefeng.wang@huawei.com>
Reviewed-by: Muchun Song <songmuchun@bytedance.com>
Cc: Christoph Lameter <cl@linux.com>
Cc: Pekka Enberg <penberg@kernel.org>
Cc: David Rientjes <rientjes@google.com>
Cc: Joonsoo Kim <iamjoonsoo.kim@lge.com>
Cc: Vlastimil Babka <vbabka@suse.cz>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Cc: Alexei Starovoitov <ast@kernel.org>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
SLUB uses page allocator for higher order allocations and update
unreclaimable slab stat for such allocations. At the moment, the bulk
free for SLUB does not share code with normal free code path for these
type of allocations and have missed the stat update. So, fix the stat
update by common code. The user visible impact of the bug is the
potential of inconsistent unreclaimable slab stat visible through
meminfo and vmstat.
Link: https://lkml.kernel.org/r/20210728155354.3440560-1-shakeelb@google.com
Fixes: 6a486c0ad4 ("mm, sl[ou]b: improve memory accounting")
Signed-off-by: Shakeel Butt <shakeelb@google.com>
Acked-by: Michal Hocko <mhocko@suse.com>
Acked-by: Roman Gushchin <guro@fb.com>
Reviewed-by: Muchun Song <songmuchun@bytedance.com>
Cc: Christoph Lameter <cl@linux.com>
Cc: Pekka Enberg <penberg@kernel.org>
Cc: David Rientjes <rientjes@google.com>
Cc: Joonsoo Kim <iamjoonsoo.kim@lge.com>
Cc: Vlastimil Babka <vbabka@suse.cz>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Similar to commit 2da9f6305f ("mm/vmscan: fix NR_ISOLATED_FILE
corruption on 64-bit") avoid using unsigned int for nr_pages. With
unsigned int type the large unsigned int converts to a large positive
signed long.
Symptoms include CMA allocations hanging forever due to
alloc_contig_range->...->isolate_migratepages_block waiting forever in
"while (unlikely(too_many_isolated(pgdat)))".
Link: https://lkml.kernel.org/r/20210728042531.359409-1-aneesh.kumar@linux.ibm.com
Fixes: c5fc5c3ae0 ("mm: migrate: account THP NUMA migration counters correctly")
Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.ibm.com>
Reported-by: Michael Ellerman <mpe@ellerman.id.au>
Reported-by: Alexey Kardashevskiy <aik@ozlabs.ru>
Reviewed-by: Yang Shi <shy828301@gmail.com>
Cc: Mel Gorman <mgorman@suse.de>
Cc: Nicholas Piggin <npiggin@gmail.com>
Cc: David Hildenbrand <david@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Dan Carpenter reports:
The patch 2d146aa3aa: "mm: memcontrol: switch to rstat" from Apr
29, 2021, leads to the following static checker warning:
kernel/cgroup/rstat.c:200 cgroup_rstat_flush()
warn: sleeping in atomic context
mm/memcontrol.c
3572 static unsigned long mem_cgroup_usage(struct mem_cgroup *memcg, bool swap)
3573 {
3574 unsigned long val;
3575
3576 if (mem_cgroup_is_root(memcg)) {
3577 cgroup_rstat_flush(memcg->css.cgroup);
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
This is from static analysis and potentially a false positive. The
problem is that mem_cgroup_usage() is called from __mem_cgroup_threshold()
which holds an rcu_read_lock(). And the cgroup_rstat_flush() function
can sleep.
3578 val = memcg_page_state(memcg, NR_FILE_PAGES) +
3579 memcg_page_state(memcg, NR_ANON_MAPPED);
3580 if (swap)
3581 val += memcg_page_state(memcg, MEMCG_SWAP);
3582 } else {
3583 if (!swap)
3584 val = page_counter_read(&memcg->memory);
3585 else
3586 val = page_counter_read(&memcg->memsw);
3587 }
3588 return val;
3589 }
__mem_cgroup_threshold() indeed holds the rcu lock. In addition, the
thresholding code is invoked during stat changes, and those contexts
have irqs disabled as well. If the lock breaking occurs inside the
flush function, it will result in a sleep from an atomic context.
Use the irqsafe flushing variant in mem_cgroup_usage() to fix this.
Link: https://lkml.kernel.org/r/20210726150019.251820-1-hannes@cmpxchg.org
Fixes: 2d146aa3aa ("mm: memcontrol: switch to rstat")
Signed-off-by: Johannes Weiner <hannes@cmpxchg.org>
Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
Acked-by: Chris Down <chris@chrisdown.name>
Reviewed-by: Rik van Riel <riel@surriel.com>
Acked-by: Michal Hocko <mhocko@suse.com>
Reviewed-by: Shakeel Butt <shakeelb@google.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
For punch holes in EOF blocks, fallocate used buffer write to zero the
EOF blocks in last cluster. But since ->writepage will ignore EOF
pages, those zeros will not be flushed.
This "looks" ok as commit 6bba4471f0 ("ocfs2: fix data corruption by
fallocate") will zero the EOF blocks when extend the file size, but it
isn't. The problem happened on those EOF pages, before writeback, those
pages had DIRTY flag set and all buffer_head in them also had DIRTY flag
set, when writeback run by write_cache_pages(), DIRTY flag on the page
was cleared, but DIRTY flag on the buffer_head not.
When next write happened to those EOF pages, since buffer_head already
had DIRTY flag set, it would not mark page DIRTY again. That made
writeback ignore them forever. That will cause data corruption. Even
directio write can't work because it will fail when trying to drop pages
caches before direct io, as it found the buffer_head for those pages
still had DIRTY flag set, then it will fall back to buffer io mode.
To make a summary of the issue, as writeback ingores EOF pages, once any
EOF page is generated, any write to it will only go to the page cache,
it will never be flushed to disk even file size extends and that page is
not EOF page any more. The fix is to avoid zero EOF blocks with buffer
write.
The following code snippet from qemu-img could trigger the corruption.
656 open("6b3711ae-3306-4bdd-823c-cf1c0060a095.conv.2", O_RDWR|O_DIRECT|O_CLOEXEC) = 11
...
660 fallocate(11, FALLOC_FL_KEEP_SIZE|FALLOC_FL_PUNCH_HOLE, 2275868672, 327680 <unfinished ...>
660 fallocate(11, 0, 2275868672, 327680) = 0
658 pwrite64(11, "
Link: https://lkml.kernel.org/r/20210722054923.24389-2-junxiao.bi@oracle.com
Signed-off-by: Junxiao Bi <junxiao.bi@oracle.com>
Reviewed-by: Joseph Qi <joseph.qi@linux.alibaba.com>
Cc: Mark Fasheh <mark@fasheh.com>
Cc: Joel Becker <jlbec@evilplan.org>
Cc: Changwei Ge <gechangwei@live.cn>
Cc: Gang He <ghe@suse.com>
Cc: Jun Piao <piaojun@huawei.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
If append-dio feature is enabled, direct-io write and fallocate could
run in parallel to extend file size, fallocate used "orig_isize" to
record i_size before taking "ip_alloc_sem", when
ocfs2_zeroout_partial_cluster() zeroout EOF blocks, i_size maybe already
extended by ocfs2_dio_end_io_write(), that will cause valid data zeroed
out.
Link: https://lkml.kernel.org/r/20210722054923.24389-1-junxiao.bi@oracle.com
Fixes: 6bba4471f0 ("ocfs2: fix data corruption by fallocate")
Signed-off-by: Junxiao Bi <junxiao.bi@oracle.com>
Reviewed-by: Joseph Qi <joseph.qi@linux.alibaba.com>
Cc: Changwei Ge <gechangwei@live.cn>
Cc: Gang He <ghe@suse.com>
Cc: Joel Becker <jlbec@evilplan.org>
Cc: Jun Piao <piaojun@huawei.com>
Cc: Mark Fasheh <mark@fasheh.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
STRING_SELFTEST is presented in the "Library routines" menu. Move it in
Kernel hacking > Kernel Testing and Coverage > Runtime Testing together
with other similar tests found in lib/
--- Runtime Testing
<*> Test functions located in the hexdump module at runtime
<*> Test string functions (NEW)
<*> Test functions located in the string_helpers module at runtime
<*> Test strscpy*() family of functions at runtime
<*> Test kstrto*() family of functions at runtime
<*> Test printf() family of functions at runtime
<*> Test scanf() family of functions at runtime
Link: https://lkml.kernel.org/r/20210719185158.190371-1-mcroce@linux.microsoft.com
Signed-off-by: Matteo Croce <mcroce@microsoft.com>
Cc: Peter Rosin <peda@axentia.se>
Cc: Geert Uytterhoeven <geert@linux-m68k.org>
Cc: Randy Dunlap <rdunlap@infradead.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
The team maintaining the gve driver has undergone some changes,
this updates the MAINTAINERS file accordingly.
Signed-off-by: Catherine Sullivan <csully@google.com>
Signed-off-by: Jon Olson <jonolson@google.com>
Signed-off-by: David Awogbemila <awogbemila@google.com>
Signed-off-by: Jeroen de Borst <jeroendb@google.com>
Link: https://lore.kernel.org/r/20210729155258.442650-1-csully@google.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
