This is the start of the stable review cycle for the 6.6.91 release. There are 113 patches in this series, all will be posted as a response to this one. If anyone has any issues with these being applied, please let me know.

Responses should be made by Fri, 16 May 2025 12:55:38 +0000. Anything received after that time might be too late.

The whole patch series can be found in one patch at: https://www.kernel.org/pub/linux/kernel/v6.x/stable-review/patch-6.6.91-rc2.... or in the git tree and branch at: git://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable-rc.git linux-6.6.y and the diffstat can be found below.

thanks,

greg k-h

------------- Pseudo-Shortlog of commits:

Greg Kroah-Hartman gregkh@linuxfoundation.org Linux 6.6.91-rc2

Peter Zijlstra peterz@infradead.org x86/its: FineIBT-paranoid vs ITS

Eric Biggers ebiggers@google.com x86/its: Fix build errors when CONFIG_MODULES=n

Peter Zijlstra peterz@infradead.org x86/its: Use dynamic thunks for indirect branches

Pawan Gupta pawan.kumar.gupta@linux.intel.com x86/ibt: Keep IBT disabled during alternative patching

Pawan Gupta pawan.kumar.gupta@linux.intel.com x86/its: Align RETs in BHB clear sequence to avoid thunking

Pawan Gupta pawan.kumar.gupta@linux.intel.com x86/its: Add support for RSB stuffing mitigation

Pawan Gupta pawan.kumar.gupta@linux.intel.com x86/its: Add "vmexit" option to skip mitigation on some CPUs

Pawan Gupta pawan.kumar.gupta@linux.intel.com x86/its: Enable Indirect Target Selection mitigation

Pawan Gupta pawan.kumar.gupta@linux.intel.com x86/its: Add support for ITS-safe return thunk

Pawan Gupta pawan.kumar.gupta@linux.intel.com x86/its: Add support for ITS-safe indirect thunk

Pawan Gupta pawan.kumar.gupta@linux.intel.com x86/its: Enumerate Indirect Target Selection (ITS) bug

Pawan Gupta pawan.kumar.gupta@linux.intel.com Documentation: x86/bugs/its: Add ITS documentation

Pawan Gupta pawan.kumar.gupta@linux.intel.com x86/speculation: Remove the extra #ifdef around CALL_NOSPEC

Pawan Gupta pawan.kumar.gupta@linux.intel.com x86/speculation: Add a conditional CS prefix to CALL_NOSPEC

Pawan Gupta pawan.kumar.gupta@linux.intel.com x86/speculation: Simplify and make CALL_NOSPEC consistent

Pawan Gupta pawan.kumar.gupta@linux.intel.com x86/bhi: Do not set BHI_DIS_S in 32-bit mode

Daniel Sneddon daniel.sneddon@linux.intel.com x86/bpf: Add IBHF call at end of classic BPF

Daniel Sneddon daniel.sneddon@linux.intel.com x86/bpf: Call branch history clearing sequence on exit

James Morse james.morse@arm.com arm64: proton-pack: Add new CPUs 'k' values for branch mitigation

James Morse james.morse@arm.com arm64: bpf: Only mitigate cBPF programs loaded by unprivileged users

James Morse james.morse@arm.com arm64: bpf: Add BHB mitigation to the epilogue for cBPF programs

James Morse james.morse@arm.com arm64: proton-pack: Expose whether the branchy loop k value

James Morse james.morse@arm.com arm64: proton-pack: Expose whether the platform is mitigated by firmware

James Morse james.morse@arm.com arm64: insn: Add support for encoding DSB

Jens Axboe axboe@kernel.dk io_uring: ensure deferred completions are posted for multishot

Jens Axboe axboe@kernel.dk io_uring: always arm linked timeouts prior to issue

Al Viro viro@zeniv.linux.org.uk do_umount(): add missing barrier before refcount checks in sync case

Daniel Wagner wagi@kernel.org nvme: unblock ctrl state transition for firmware update

Kevin Baker kevinb@ventureresearch.com drm/panel: simple: Update timings for AUO G101EVN010

Thorsten Blum thorsten.blum@linux.dev MIPS: Fix MAX_REG_OFFSET

Jonathan Cameron Jonathan.Cameron@huawei.com iio: adc: dln2: Use aligned_s64 for timestamp

Jonathan Cameron Jonathan.Cameron@huawei.com iio: accel: adxl355: Make timestamp 64-bit aligned using aligned_s64

Andy Shevchenko andriy.shevchenko@linux.intel.com types: Complement the aligned types with signed 64-bit one

Jonathan Cameron Jonathan.Cameron@huawei.com iio: temp: maxim-thermocouple: Fix potential lack of DMA safe buffer.

Lothar Rubusch l.rubusch@gmail.com iio: accel: adxl367: fix setting odr for activity time update

Dave Penkler dpenkler@gmail.com usb: usbtmc: Fix erroneous generic_read ioctl return

Dave Penkler dpenkler@gmail.com usb: usbtmc: Fix erroneous wait_srq ioctl return

Dave Penkler dpenkler@gmail.com usb: usbtmc: Fix erroneous get_stb ioctl error returns

Oliver Neukum oneukum@suse.com USB: usbtmc: use interruptible sleep in usbtmc_read

Andrei Kuchynski akuchynski@chromium.org usb: typec: ucsi: displayport: Fix NULL pointer access

RD Babiera rdbabiera@google.com usb: typec: tcpm: delay SNK_TRY_WAIT_DEBOUNCE to SRC_TRYWAIT transition

Jim Lin jilin@nvidia.com usb: host: tegra: Prevent host controller crash when OTG port is used

Prashanth K prashanth.k@oss.qualcomm.com usb: gadget: Use get_status callback to set remote wakeup capability

Wayne Chang waynec@nvidia.com usb: gadget: tegra-xudc: ACK ST_RC after clearing CTRL_RUN

Prashanth K prashanth.k@oss.qualcomm.com usb: gadget: f_ecm: Add get_status callback

Pawel Laszczak pawell@cadence.com usb: cdnsp: fix L1 resume issue for RTL_REVISION_NEW_LPM version

Pawel Laszczak pawell@cadence.com usb: cdnsp: Fix issue with resuming from L1

Jan Kara jack@suse.cz ocfs2: stop quota recovery before disabling quotas

Jan Kara jack@suse.cz ocfs2: implement handshaking with ocfs2 recovery thread

Jan Kara jack@suse.cz ocfs2: switch osb->disable_recovery to enum

Borislav Petkov (AMD) bp@alien8.de x86/microcode: Consolidate the loader enablement checking

Dmitry Antipov dmantipov@yandex.ru module: ensure that kobject_put() is safe for module type kobjects

Sebastian Andrzej Siewior bigeasy@linutronix.de clocksource/i8253: Use raw_spinlock_irqsave() in clockevent_i8253_disable()

Jason Andryuk jason.andryuk@amd.com xenbus: Use kref to track req lifetime

John Ernberg john.ernberg@actia.se xen: swiotlb: Use swiotlb bouncing if kmalloc allocation demands it

Paul Aurich paul@darkrain42.org smb: client: Avoid race in open_cached_dir with lease breaks

Alexey Charkov alchark@gmail.com usb: uhci-platform: Make the clock really optional

Alex Deucher alexander.deucher@amd.com drm/amdgpu/hdp6: use memcfg register to post the write for HDP flush

Alex Deucher alexander.deucher@amd.com drm/amdgpu/hdp5: use memcfg register to post the write for HDP flush

Alex Deucher alexander.deucher@amd.com drm/amdgpu/hdp5.2: use memcfg register to post the write for HDP flush

Alex Deucher alexander.deucher@amd.com drm/amdgpu/hdp4: use memcfg register to post the write for HDP flush

Wayne Lin Wayne.Lin@amd.com drm/amd/display: Copy AUX read reply data whenever length > 0

Wayne Lin Wayne.Lin@amd.com drm/amd/display: Fix wrong handling for AUX_DEFER case

Wayne Lin Wayne.Lin@amd.com drm/amd/display: Remove incorrect checking in dmub aux handler

Wayne Lin Wayne.Lin@amd.com drm/amd/display: Fix the checking condition in dmub aux handling

Aurabindo Pillai aurabindo.pillai@amd.com drm/amd/display: more liberal vmin/vmax update for freesync

Maíra Canal mcanal@igalia.com drm/v3d: Add job to pending list if the reset was skipped

Silvano Seva s.seva@4sigma.it iio: imu: st_lsm6dsx: fix possible lockup in st_lsm6dsx_read_tagged_fifo

Silvano Seva s.seva@4sigma.it iio: imu: st_lsm6dsx: fix possible lockup in st_lsm6dsx_read_fifo

Gabriel Shahrouzi gshahrouzi@gmail.com iio: adis16201: Correct inclinometer channel resolution

Simon Xue xxm@rock-chips.com iio: adc: rockchip: Fix clock initialization sequence

Angelo Dureghello adureghello@baylibre.com iio: adc: ad7606: fix serial register access

Wayne Lin Wayne.Lin@amd.com drm/amd/display: Shift DMUB AUX reply command if necessary

Dave Hansen dave.hansen@linux.intel.com x86/mm: Eliminate window where TLB flushes may be inadvertently skipped

Gabriel Shahrouzi gshahrouzi@gmail.com staging: axis-fifo: Correct handling of tx_fifo_depth for size validation

Gabriel Shahrouzi gshahrouzi@gmail.com staging: axis-fifo: Remove hardware resets for user errors

Gabriel Shahrouzi gshahrouzi@gmail.com staging: iio: adc: ad7816: Correct conditional logic for store mode

Aditya Garg gargaditya08@live.com Input: synaptics - enable InterTouch on TUXEDO InfinityBook Pro 14 v5

Dmitry Torokhov dmitry.torokhov@gmail.com Input: synaptics - enable SMBus for HP Elitebook 850 G1

Aditya Garg gargaditya08@live.com Input: synaptics - enable InterTouch on Dell Precision M3800

Aditya Garg gargaditya08@live.com Input: synaptics - enable InterTouch on Dynabook Portege X30L-G

Manuel Fombuena fombuena@outlook.com Input: synaptics - enable InterTouch on Dynabook Portege X30-D

Vicki Pfau vi@endrift.com Input: xpad - fix two controller table values

Lode Willems me@lodewillems.com Input: xpad - add support for 8BitDo Ultimate 2 Wireless Controller

Vicki Pfau vi@endrift.com Input: xpad - fix Share button on Xbox One controllers

Gary Bisson bisson.gary@gmail.com Input: mtk-pmic-keys - fix possible null pointer dereference

Mikael Gonella-Bolduc mgonellabolduc@dimonoff.com Input: cyttsp5 - fix power control issue on wakeup

Hugo Villeneuve hvilleneuve@dimonoff.com Input: cyttsp5 - ensure minimum reset pulse width

Jonas Gorski jonas.gorski@gmail.com net: dsa: b53: fix learning on VLAN unaware bridges

Jonas Gorski jonas.gorski@gmail.com net: dsa: b53: always rejoin default untagged VLAN on bridge leave

Jonas Gorski jonas.gorski@gmail.com net: dsa: b53: fix VLAN ID for untagged vlan on bridge leave

Jonas Gorski jonas.gorski@gmail.com net: dsa: b53: fix flushing old pvid VLAN on pvid change

Jonas Gorski jonas.gorski@gmail.com net: dsa: b53: fix clearing PVID of a port

Jonas Gorski jonas.gorski@gmail.com net: dsa: b53: allow leaky reserved multicast

Paul Chaignon paul.chaignon@gmail.com bpf: Scrub packet on bpf_redirect_peer

Jozsef Kadlecsik kadlec@netfilter.org netfilter: ipset: fix region locking in hash types

Julian Anastasov ja@ssi.bg ipvs: fix uninit-value for saddr in do_output_route4

Oliver Hartkopp socketcan@hartkopp.net can: gw: fix RCU/BH usage in cgw_create_job()

Kelsey Maes kelsey@vpprocess.com can: mcp251xfd: fix TDC setting for low data bit rates

Daniel Golle daniel@makrotopia.org net: ethernet: mtk_eth_soc: reset all TX queues on DMA free

Alexander Lobakin aleksander.lobakin@intel.com netdevice: add netdev_tx_reset_subqueue() shorthand

Guillaume Nault gnault@redhat.com gre: Fix again IPv6 link-local address generation.

Cong Wang xiyou.wangcong@gmail.com sch_htb: make htb_deactivate() idempotent

Wang Zhaolong wangzhaolong1@huawei.com ksmbd: fix memory leak in parse_lease_state()

Eelco Chaudron echaudro@redhat.com openvswitch: Fix unsafe attribute parsing in output_userspace()

Sean Heelan seanheelan@gmail.com ksmbd: Fix UAF in __close_file_table_ids

Norbert Szetei norbert@doyensec.com ksmbd: prevent out-of-bounds stream writes by validating *pos

Namjae Jeon linkinjeon@kernel.org ksmbd: prevent rename with empty string

Marc Kleine-Budde mkl@pengutronix.de can: mcp251xfd: mcp251xfd_remove(): fix order of unregistration calls

Veerendranath Jakkam quic_vjakkam@quicinc.com wifi: cfg80211: fix out-of-bounds access during multi-link element defragmentation

Marc Kleine-Budde mkl@pengutronix.de can: mcan: m_can_class_unregister(): fix order of unregistration calls

Wojciech Dubowik Wojciech.Dubowik@mt.com arm64: dts: imx8mm-verdin: Link reg_usdhc2_vqmmc to usdhc2

Dan Carpenter dan.carpenter@linaro.org dm: add missing unlock on in dm_keyslot_evict()

-------------

Diffstat:

Documentation/ABI/testing/sysfs-devices-system-cpu | 1 + Documentation/admin-guide/hw-vuln/index.rst | 1 + .../hw-vuln/indirect-target-selection.rst | 168 ++++++++++++++++ Documentation/admin-guide/kernel-parameters.txt | 18 ++ Makefile | 4 +- arch/arm64/boot/dts/freescale/imx8mm-verdin.dtsi | 25 ++- arch/arm64/include/asm/cputype.h | 2 + arch/arm64/include/asm/insn.h | 1 + arch/arm64/include/asm/spectre.h | 3 + arch/arm64/kernel/proton-pack.c | 13 +- arch/arm64/lib/insn.c | 76 +++++--- arch/arm64/net/bpf_jit_comp.c | 57 +++++- arch/mips/include/asm/ptrace.h | 3 +- arch/x86/Kconfig | 11 ++ arch/x86/entry/entry_64.S | 20 +- arch/x86/include/asm/alternative.h | 32 ++++ arch/x86/include/asm/cpufeatures.h | 3 + arch/x86/include/asm/microcode.h | 2 + arch/x86/include/asm/msr-index.h | 8 + arch/x86/include/asm/nospec-branch.h | 44 +++-- arch/x86/kernel/alternative.c | 211 ++++++++++++++++++++- arch/x86/kernel/cpu/bugs.c | 178 ++++++++++++++++- arch/x86/kernel/cpu/common.c | 72 +++++-- arch/x86/kernel/cpu/microcode/amd.c | 6 +- arch/x86/kernel/cpu/microcode/core.c | 60 +++--- arch/x86/kernel/cpu/microcode/intel.c | 2 +- arch/x86/kernel/cpu/microcode/internal.h | 1 - arch/x86/kernel/ftrace.c | 2 +- arch/x86/kernel/head32.c | 4 - arch/x86/kernel/module.c | 7 + arch/x86/kernel/static_call.c | 4 +- arch/x86/kernel/vmlinux.lds.S | 10 + arch/x86/kvm/x86.c | 4 +- arch/x86/lib/retpoline.S | 39 ++++ arch/x86/mm/tlb.c | 23 ++- arch/x86/net/bpf_jit_comp.c | 61 +++++- drivers/base/cpu.c | 3 + drivers/clocksource/i8253.c | 4 +- drivers/gpu/drm/amd/amdgpu/hdp_v4_0.c | 7 +- drivers/gpu/drm/amd/amdgpu/hdp_v5_0.c | 7 +- drivers/gpu/drm/amd/amdgpu/hdp_v5_2.c | 12 +- drivers/gpu/drm/amd/amdgpu/hdp_v6_0.c | 7 +- drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c | 36 ++-- .../amd/display/amdgpu_dm/amdgpu_dm_mst_types.c | 28 ++- drivers/gpu/drm/panel/panel-simple.c | 25 +-- drivers/gpu/drm/v3d/v3d_sched.c | 28 ++- drivers/iio/accel/adis16201.c | 4 +- drivers/iio/accel/adxl355_core.c | 2 +- drivers/iio/accel/adxl367.c | 10 +- drivers/iio/adc/ad7606_spi.c | 2 +- drivers/iio/adc/dln2-adc.c | 2 +- drivers/iio/adc/rockchip_saradc.c | 17 +- drivers/iio/imu/st_lsm6dsx/st_lsm6dsx_buffer.c | 6 + drivers/iio/temperature/maxim_thermocouple.c | 2 +- drivers/input/joystick/xpad.c | 40 ++-- drivers/input/keyboard/mtk-pmic-keys.c | 4 +- drivers/input/mouse/synaptics.c | 5 + drivers/input/touchscreen/cyttsp5.c | 7 +- drivers/md/dm-table.c | 3 +- drivers/net/can/m_can/m_can.c | 2 +- drivers/net/can/spi/mcp251xfd/mcp251xfd-core.c | 42 +++- drivers/net/dsa/b53/b53_common.c | 36 ++-- drivers/net/ethernet/mediatek/mtk_eth_soc.c | 16 +- drivers/nvme/host/core.c | 3 +- drivers/staging/axis-fifo/axis-fifo.c | 14 +- drivers/staging/iio/adc/ad7816.c | 2 +- drivers/usb/cdns3/cdnsp-gadget.c | 31 +++ drivers/usb/cdns3/cdnsp-gadget.h | 6 + drivers/usb/cdns3/cdnsp-pci.c | 12 +- drivers/usb/cdns3/cdnsp-ring.c | 3 +- drivers/usb/cdns3/core.h | 3 + drivers/usb/class/usbtmc.c | 59 +++--- drivers/usb/gadget/composite.c | 12 +- drivers/usb/gadget/function/f_ecm.c | 7 + drivers/usb/gadget/udc/tegra-xudc.c | 4 + drivers/usb/host/uhci-platform.c | 2 +- drivers/usb/host/xhci-tegra.c | 3 + drivers/usb/typec/tcpm/tcpm.c | 2 +- drivers/usb/typec/ucsi/displayport.c | 2 + drivers/xen/swiotlb-xen.c | 1 + drivers/xen/xenbus/xenbus.h | 2 + drivers/xen/xenbus/xenbus_comms.c | 9 +- drivers/xen/xenbus/xenbus_dev_frontend.c | 2 +- drivers/xen/xenbus/xenbus_xs.c | 18 +- fs/namespace.c | 3 +- fs/ocfs2/journal.c | 80 +++++--- fs/ocfs2/journal.h | 1 + fs/ocfs2/ocfs2.h | 17 +- fs/ocfs2/quota_local.c | 9 +- fs/ocfs2/super.c | 3 + fs/smb/client/cached_dir.c | 10 +- fs/smb/server/oplock.c | 7 +- fs/smb/server/smb2pdu.c | 5 + fs/smb/server/vfs.c | 7 + fs/smb/server/vfs_cache.c | 33 +++- include/linux/cpu.h | 2 + include/linux/module.h | 5 + include/linux/netdevice.h | 13 +- include/linux/types.h | 3 +- include/uapi/linux/types.h | 1 + io_uring/io_uring.c | 61 +++--- kernel/params.c | 4 +- net/can/gw.c | 151 +++++++++------ net/core/filter.c | 1 + net/ipv6/addrconf.c | 15 +- net/netfilter/ipset/ip_set_hash_gen.h | 2 +- net/netfilter/ipvs/ip_vs_xmit.c | 27 +-- net/openvswitch/actions.c | 3 +- net/sched/sch_htb.c | 15 +- net/wireless/scan.c | 2 +- 110 files changed, 1716 insertions(+), 494 deletions(-)