Jammy update: v5.15.120 upstream stable release

[Kamal Mostafa]

SRU Justification

    Impact:
       The upstream process for stable tree updates is quite similar
       in scope to the Ubuntu SRU process, e.g., each patch has to
       demonstrably fix a bug, and each patch is vetted by upstream
       by originating either directly from a mainline/stable Linux tree or
       a minimally backported form of that patch. The following upstream
       stable patches should be included in the Ubuntu kernel:

       v5.15.120 upstream stable release
       from git://git.kernel.org/

mptcp: fix possible divide by zero in recvmsg()
mptcp: consolidate fallback and non fallback state machine
mm, hwpoison: try to recover from copy-on write faults
mm, hwpoison: when copy-on-write hits poison, take page offline
drm/amdgpu: Set vmbo destroy after pt bo is created
x86/microcode/AMD: Load late on both threads too
x86/smp: Use dedicated cache-line for mwait_play_dead()
can: isotp: isotp_sendmsg(): fix return error fix on TX path
bpf: ensure main program has an extable
HID: wacom: Use ktime_t rather than int when dealing with timestamps
HID: logitech-hidpp: add HIDPP_QUIRK_DELAYED_INIT for the T651.
Revert "thermal/drivers/mediatek: Use devm_of_iomap to avoid resource leak in mtk_thermal_probe"
perf symbols: Symbol lookup with kcore can fail if multiple segments match stext
scripts/tags.sh: Resolve gtags empty index generation
drm/amdgpu: Validate VM ioctl flags.
parisc: Delete redundant register definitions in <asm/assembly.h>
nubus: Partially revert proc_create_single_data() conversion
Linux 5.15.120
UBUNTU: Upstream stable to v5.15.120

[Launchpad Janitor (janitor)]

This bug was fixed in the package linux - 5.15.0-86.96

---------------
linux (5.15.0-86.96) jammy; urgency=medium

  * jammy/linux: 5.15.0-86.96 -proposed tracker (LP: #2036575)

  * 5.15.0-85 live migration regression (LP: #2036675)
    - Revert "KVM: x86: Always enable legacy FP/SSE in allowed user XFEATURES"
    - Revert "x86/kvm/fpu: Limit guest user_xfeatures to supported bits of XCR0"

  * Regression for ubuntu_bpf test build on Jammy 5.15.0-85.95 (LP: #2035181)
    - selftests/bpf: fix static assert compilation issue for test_cls_*.c

  * `refcount_t: underflow; use-after-free.` on hidon w/ 5.15.0-85-generic
    (LP: #2034447)
    - crypto: rsa-pkcs1pad - Use helper to set reqsize

linux (5.15.0-85.95) jammy; urgency=medium

  * jammy/linux: 5.15.0-85.95 -proposed tracker (LP: #2033821)

  * Please enable Renesas RZ platform serial installer (LP: #2022361)
    - [Config] enable hihope RZ/G2M serial console
    - [Config] Mark sh-sci as built-in

  * Request backport of xen timekeeping performance improvements (LP: #2033122)
    - x86/xen/time: prefer tsc as clocksource when it is invariant

  * kdump doesn't work with UEFI secure boot and kernel lockdown enabled on
    ARM64 (LP: #2033007)
    - [Config]: Enable CONFIG_KEXEC_IMAGE_VERIFY_SIG
    - kexec, KEYS: make the code in bzImage64_verify_sig generic
    - arm64: kexec_file: use more system keyrings to verify kernel image signature

  * ubuntu_kernel_selftests:net:vrf-xfrm-tests.sh: 8 failed test cases on
    jammy/fips (LP: #2019880)
    - selftests: net: vrf-xfrm-tests: change authentication and encryption algos

  * ubuntu_kernel_selftests:net:tls: 88 failed test cases on jammy/fips
    (LP: #2019868)
    - selftests/harness: allow tests to be skipped during setup
    - selftests: net: tls: check if FIPS mode is enabled

  * A general-proteciton exception during guest migration to unsupported PKRU
    machine (LP: 2032164, reverted)
    - x86/kvm/fpu: Limit guest user_xfeatures to supported bits of XCR0
    - KVM: x86: Always enable legacy FP/SSE in allowed user XFEATURES

  * CVE-2023-4569
    - netfilter: nf_tables: deactivate catchall elements in next generation

  * CVE-2023-20569
    - x86/cpu, kvm: Add support for CPUID_80000021_EAX
    - x86/srso: Add a Speculative RAS Overflow mitigation
    - x86/srso: Add IBPB_BRTYPE support
    - x86/srso: Add SRSO_NO support
    - x86/srso: Add IBPB
    - x86/srso: Add IBPB on VMEXIT
    - x86/srso: Fix return thunks in generated code
    - x86/srso: Tie SBPB bit setting to microcode patch detection
    - x86: fix backwards merge of GDS/SRSO bit
    - x86/srso: Fix build breakage with the LLVM linker
    - x86/cpu: Fix __x86_return_thunk symbol type
    - x86/cpu: Fix up srso_safe_ret() and __x86_return_thunk()
    - x86/alternative: Make custom return thunk unconditional
    - objtool: Add frame-pointer-specific function ignore
    - x86/ibt: Add ANNOTATE_NOENDBR
    - x86/cpu: Clean up SRSO return thunk mess
    - x86/cpu: Rename original retbleed methods
    - x86/cpu: Rename srso_(.*)_alias to srso_alias_\1
    - x86/cpu: Cleanup the untrain mess
    - x86/srso: Explain the untraining sequences a bit more
    - x86/static_call:...