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Update 5.15.x+fslc up to v5.15.16 #528

Merged
merged 30 commits into from
Jan 20, 2022
Merged

Commits on Jan 20, 2022

  1. devtmpfs regression fix: reconfigure on each mount

    commit a609718 upstream.
    
    Prior to Linux v5.4 devtmpfs used mount_single() which treats the given
    mount options as "remount" options, so it updates the configuration of
    the single super_block on each mount.
    
    Since that was changed, the mount options used for devtmpfs are ignored.
    This is a regression which affect systemd - which mounts devtmpfs with
    "-o mode=755,size=4m,nr_inodes=1m".
    
    This patch restores the "remount" effect by calling reconfigure_single()
    
    Fixes: d401727 ("devtmpfs: don't mix {ramfs,shmem}_fill_super() with mount_single()")
    Acked-by: Christian Brauner <[email protected]>
    Cc: Al Viro <[email protected]>
    Signed-off-by: NeilBrown <[email protected]>
    Signed-off-by: Linus Torvalds <[email protected]>
    Signed-off-by: Greg Kroah-Hartman <[email protected]>
    neilbrown authored and gregkh committed Jan 20, 2022
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  2. drm/amd/display: explicitly set is_dsc_supported to false before use

    commit 63ad537 upstream.
    
    When UBSAN is enabled a case is shown on unplugging the display that
    this variable hasn't been initialized by `update_dsc_caps`, presumably
    when the display was unplugged it wasn't copied from the DPCD.
    
    Link: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1956497
    Signed-off-by: Mario Limonciello <[email protected]>
    Acked-by: Alex Deucher <[email protected]>
    Signed-off-by: Alex Deucher <[email protected]>
    Signed-off-by: Greg Kroah-Hartman <[email protected]>
    superm1 authored and gregkh committed Jan 20, 2022
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  3. orangefs: Fix the size of a memory allocation in orangefs_bufmap_alloc()

    commit 40a7487 upstream.
    
    'buffer_index_array' really looks like a bitmap. So it should be allocated
    as such.
    When kzalloc is called, a number of bytes is expected, but a number of
    longs is passed instead.
    
    In get(), if not enough memory is allocated, un-allocated memory may be
    read or written.
    
    So use bitmap_zalloc() to safely allocate the correct memory size and
    avoid un-expected behavior.
    
    While at it, change the corresponding kfree() into bitmap_free() to keep
    the semantic.
    
    Fixes: ea2c9c9 ("orangefs: bufmap rewrite")
    Signed-off-by: Christophe JAILLET <[email protected]>
    Signed-off-by: Mike Marshall <[email protected]>
    Signed-off-by: Greg Kroah-Hartman <[email protected]>
    tititiou36 authored and gregkh committed Jan 20, 2022
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  4. remoteproc: qcom: pil_info: Don't memcpy_toio more than is provided

    commit fdc1223 upstream.
    
    If the string passed into qcom_pil_info_store() isn't as long as
    PIL_RELOC_NAME_LEN we'll try to copy the string assuming the length is
    PIL_RELOC_NAME_LEN to the io space and go beyond the bounds of the
    string. Let's only copy as many byes as the string is long, ignoring the
    NUL terminator.
    
    This fixes the following KASAN error:
    
     BUG: KASAN: global-out-of-bounds in __memcpy_toio+0x124/0x140
     Read of size 1 at addr ffffffd35086e386 by task rmtfs/2392
    
     CPU: 2 PID: 2392 Comm: rmtfs Tainted: G        W         5.16.0-rc1-lockdep+ Freescale#10
     Hardware name: Google Lazor (rev3+) with KB Backlight (DT)
     Call trace:
      dump_backtrace+0x0/0x410
      show_stack+0x24/0x30
      dump_stack_lvl+0x7c/0xa0
      print_address_description+0x78/0x2bc
      kasan_report+0x160/0x1a0
      __asan_report_load1_noabort+0x44/0x50
      __memcpy_toio+0x124/0x140
      qcom_pil_info_store+0x298/0x358 [qcom_pil_info]
      q6v5_start+0xdf0/0x12e0 [qcom_q6v5_mss]
      rproc_start+0x178/0x3a0
      rproc_boot+0x5f0/0xb90
      state_store+0x78/0x1bc
      dev_attr_store+0x70/0x90
      sysfs_kf_write+0xf4/0x118
      kernfs_fop_write_iter+0x208/0x300
      vfs_write+0x55c/0x804
      ksys_pwrite64+0xc8/0x134
      __arm64_compat_sys_aarch32_pwrite64+0xc4/0xdc
      invoke_syscall+0x78/0x20c
      el0_svc_common+0x11c/0x1f0
      do_el0_svc_compat+0x50/0x60
      el0_svc_compat+0x5c/0xec
      el0t_32_sync_handler+0xc0/0xf0
      el0t_32_sync+0x1a4/0x1a8
    
     The buggy address belongs to the variable:
      .str.59+0x6/0xffffffffffffec80 [qcom_q6v5_mss]
    
     Memory state around the buggy address:
      ffffffd35086e280: 00 00 00 00 02 f9 f9 f9 f9 f9 f9 f9 00 00 00 00
      ffffffd35086e300: 00 02 f9 f9 f9 f9 f9 f9 00 00 00 06 f9 f9 f9 f9
     >ffffffd35086e380: 06 f9 f9 f9 05 f9 f9 f9 00 00 00 00 00 06 f9 f9
                        ^
      ffffffd35086e400: f9 f9 f9 f9 01 f9 f9 f9 04 f9 f9 f9 00 00 01 f9
      ffffffd35086e480: f9 f9 f9 f9 00 00 00 00 00 00 00 01 f9 f9 f9 f9
    
    Fixes: 549b67d ("remoteproc: qcom: Introduce helper to store pil info in IMEM")
    Signed-off-by: Stephen Boyd <[email protected]>
    Reviewed-by: Bjorn Andersson <[email protected]>
    Signed-off-by: Bjorn Andersson <[email protected]>
    Link: https://lore.kernel.org/r/[email protected]
    Signed-off-by: Greg Kroah-Hartman <[email protected]>
    bebarino authored and gregkh committed Jan 20, 2022
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  5. vfs: fs_context: fix up param length parsing in legacy_parse_param

    commit 722d948 upstream.
    
    The "PAGE_SIZE - 2 - size" calculation in legacy_parse_param() is an
    unsigned type so a large value of "size" results in a high positive
    value instead of a negative value as expected.  Fix this by getting rid
    of the subtraction.
    
    Signed-off-by: Jamie Hill-Daniel <[email protected]>
    Signed-off-by: William Liu <[email protected]>
    Tested-by: Salvatore Bonaccorso <[email protected]>
    Tested-by: Thadeu Lima de Souza Cascardo <[email protected]>
    Acked-by: Dan Carpenter <[email protected]>
    Acked-by: Al Viro <[email protected]>
    Signed-off-by: Linus Torvalds <[email protected]>
    Signed-off-by: Greg Kroah-Hartman <[email protected]>
    clubby789 authored and gregkh committed Jan 20, 2022
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  6. perf: Protect perf_guest_cbs with RCU

    commit ff083a2 upstream.
    
    Protect perf_guest_cbs with RCU to fix multiple possible errors.  Luckily,
    all paths that read perf_guest_cbs already require RCU protection, e.g. to
    protect the callback chains, so only the direct perf_guest_cbs touchpoints
    need to be modified.
    
    Bug Freescale#1 is a simple lack of WRITE_ONCE/READ_ONCE behavior to ensure
    perf_guest_cbs isn't reloaded between a !NULL check and a dereference.
    Fixed via the READ_ONCE() in rcu_dereference().
    
    Bug Freescale#2 is that on weakly-ordered architectures, updates to the callbacks
    themselves are not guaranteed to be visible before the pointer is made
    visible to readers.  Fixed by the smp_store_release() in
    rcu_assign_pointer() when the new pointer is non-NULL.
    
    Bug Freescale#3 is that, because the callbacks are global, it's possible for
    readers to run in parallel with an unregisters, and thus a module
    implementing the callbacks can be unloaded while readers are in flight,
    resulting in a use-after-free.  Fixed by a synchronize_rcu() call when
    unregistering callbacks.
    
    Bug Freescale#1 escaped notice because it's extremely unlikely a compiler will
    reload perf_guest_cbs in this sequence.  perf_guest_cbs does get reloaded
    for future derefs, e.g. for ->is_user_mode(), but the ->is_in_guest()
    guard all but guarantees the consumer will win the race, e.g. to nullify
    perf_guest_cbs, KVM has to completely exit the guest and teardown down
    all VMs before KVM start its module unload / unregister sequence.  This
    also makes it all but impossible to encounter bug Freescale#3.
    
    Bug Freescale#2 has not been a problem because all architectures that register
    callbacks are strongly ordered and/or have a static set of callbacks.
    
    But with help, unloading kvm_intel can trigger bug Freescale#1 e.g. wrapping
    perf_guest_cbs with READ_ONCE in perf_misc_flags() while spamming
    kvm_intel module load/unload leads to:
    
      BUG: kernel NULL pointer dereference, address: 0000000000000000
      #PF: supervisor read access in kernel mode
      #PF: error_code(0x0000) - not-present page
      PGD 0 P4D 0
      Oops: 0000 [Freescale#1] PREEMPT SMP
      CPU: 6 PID: 1825 Comm: stress Not tainted 5.14.0-rc2+ Freescale#459
      Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 0.0.0 02/06/2015
      RIP: 0010:perf_misc_flags+0x1c/0x70
      Call Trace:
       perf_prepare_sample+0x53/0x6b0
       perf_event_output_forward+0x67/0x160
       __perf_event_overflow+0x52/0xf0
       handle_pmi_common+0x207/0x300
       intel_pmu_handle_irq+0xcf/0x410
       perf_event_nmi_handler+0x28/0x50
       nmi_handle+0xc7/0x260
       default_do_nmi+0x6b/0x170
       exc_nmi+0x103/0x130
       asm_exc_nmi+0x76/0xbf
    
    Fixes: 39447b3 ("perf: Enhance perf to allow for guest statistic collection from host")
    Signed-off-by: Sean Christopherson <[email protected]>
    Signed-off-by: Peter Zijlstra (Intel) <[email protected]>
    Reviewed-by: Paolo Bonzini <[email protected]>
    Cc: [email protected]
    Link: https://lore.kernel.org/r/[email protected]
    Signed-off-by: Greg Kroah-Hartman <[email protected]>
    sean-jc authored and gregkh committed Jan 20, 2022
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  7. KVM: x86: Register perf callbacks after calling vendor's hardware_set…

    …up()
    
    commit 5c7df80 upstream.
    
    Wait to register perf callbacks until after doing vendor hardaware setup.
    VMX's hardware_setup() configures Intel Processor Trace (PT) mode, and a
    future fix to register the Intel PT guest interrupt hook if and only if
    Intel PT is exposed to the guest will consume the configured PT mode.
    
    Delaying registration to hardware setup is effectively a nop as KVM's perf
    hooks all pivot on the per-CPU current_vcpu, which is non-NULL only when
    KVM is handling an IRQ/NMI in a VM-Exit path.  I.e. current_vcpu will be
    NULL throughout both kvm_arch_init() and kvm_arch_hardware_setup().
    
    Signed-off-by: Sean Christopherson <[email protected]>
    Signed-off-by: Peter Zijlstra (Intel) <[email protected]>
    Acked-by: Paolo Bonzini <[email protected]>
    Cc: [email protected]
    Link: https://lore.kernel.org/r/[email protected]
    Signed-off-by: Greg Kroah-Hartman <[email protected]>
    sean-jc authored and gregkh committed Jan 20, 2022
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  8. KVM: x86: Register Processor Trace interrupt hook iff PT enabled in g…

    …uest
    
    commit f4b027c upstream.
    
    Override the Processor Trace (PT) interrupt handler for guest mode if and
    only if PT is configured for host+guest mode, i.e. is being used
    independently by both host and guest.  If PT is configured for system
    mode, the host fully controls PT and must handle all events.
    
    Fixes: 8479e04 ("KVM: x86: Inject PMI for KVM guest")
    Reported-by: Alexander Shishkin <[email protected]>
    Reported-by: Artem Kashkanov <[email protected]>
    Signed-off-by: Sean Christopherson <[email protected]>
    Signed-off-by: Peter Zijlstra (Intel) <[email protected]>
    Acked-by: Paolo Bonzini <[email protected]>
    Cc: [email protected]
    Link: https://lore.kernel.org/r/[email protected]
    Signed-off-by: Greg Kroah-Hartman <[email protected]>
    sean-jc authored and gregkh committed Jan 20, 2022
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  9. KVM: x86: don't print when fail to read/write pv eoi memory

    commit ce5977b upstream.
    
    If guest gives MSR_KVM_PV_EOI_EN a wrong value, this printk() will
    be trigged, and kernel log is spammed with the useless message
    
    Fixes: 0d88800 ("kvm: x86: ioapic and apic debug macros cleanup")
    Reported-by: Vitaly Kuznetsov <[email protected]>
    Reviewed-by: Vitaly Kuznetsov <[email protected]>
    Signed-off-by: Li RongQing <[email protected]>
    Cc: [email protected]
    Message-Id: <[email protected]>
    Signed-off-by: Paolo Bonzini <[email protected]>
    Signed-off-by: Greg Kroah-Hartman <[email protected]>
    lrq-max authored and gregkh committed Jan 20, 2022
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  10. KVM: s390: Clarify SIGP orders versus STOP/RESTART

    commit 812de04 upstream.
    
    With KVM_CAP_S390_USER_SIGP, there are only five Signal Processor
    orders (CONDITIONAL EMERGENCY SIGNAL, EMERGENCY SIGNAL, EXTERNAL CALL,
    SENSE, and SENSE RUNNING STATUS) which are intended for frequent use
    and thus are processed in-kernel. The remainder are sent to userspace
    with the KVM_CAP_S390_USER_SIGP capability. Of those, three orders
    (RESTART, STOP, and STOP AND STORE STATUS) have the potential to
    inject work back into the kernel, and thus are asynchronous.
    
    Let's look for those pending IRQs when processing one of the in-kernel
    SIGP orders, and return BUSY (CC2) if one is in process. This is in
    agreement with the Principles of Operation, which states that only one
    order can be "active" on a CPU at a time.
    
    Cc: [email protected]
    Suggested-by: David Hildenbrand <[email protected]>
    Signed-off-by: Eric Farman <[email protected]>
    Reviewed-by: Christian Borntraeger <[email protected]>
    Acked-by: David Hildenbrand <[email protected]>
    Link: https://lore.kernel.org/r/[email protected]
    [[email protected]: add stable tag]
    Signed-off-by: Christian Borntraeger <[email protected]>
    Signed-off-by: Greg Kroah-Hartman <[email protected]>
    efarman authored and gregkh committed Jan 20, 2022
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  11. remoteproc: qcom: pas: Add missing power-domain "mxc" for CDSP

    commit dd585d9 upstream.
    
    Add missing power-domain "mxc" required by CDSP PAS remoteproc on SM8350
    SoC.
    
    Fixes: e8b4e9a ("remoteproc: qcom: pas: Add SM8350 PAS remoteprocs")
    Signed-off-by: Sibi Sankar <[email protected]>
    Cc: [email protected]
    Tested-by: Bjorn Andersson <[email protected]>
    Signed-off-by: Bjorn Andersson <[email protected]>
    Link: https://lore.kernel.org/r/[email protected]
    Signed-off-by: Greg Kroah-Hartman <[email protected]>
    Sibi Sankar authored and gregkh committed Jan 20, 2022
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  12. 9p: only copy valid iattrs in 9P2000.L setattr implementation

    commit 3cb6ee9 upstream.
    
    The 9P2000.L setattr method v9fs_vfs_setattr_dotl() copies struct iattr
    values without checking whether they are valid causing unitialized
    values to be copied. The 9P2000 setattr method v9fs_vfs_setattr() method
    gets this right. Check whether struct iattr fields are valid first
    before copying in v9fs_vfs_setattr_dotl() too and make sure that all
    other fields are set to 0 apart from {g,u}id which should be set to
    INVALID_{G,U}ID. This ensure that they can be safely sent over the wire
    or printed for debugging later on.
    
    Link: https://lkml.kernel.org/r/[email protected]
    Link: https://lkml.kernel.org/r/000000000000a0d53f05d1c72a4c%40google.com
    Cc: Eric Van Hensbergen <[email protected]>
    Cc: Latchesar Ionkov <[email protected]>
    Cc: Dominique Martinet <[email protected]>
    Cc: [email protected]
    Cc: [email protected]
    Reported-by: [email protected]
    Signed-off-by: Christian Brauner <[email protected]>
    [Dominique: do not set a/mtime with just ATTR_A/MTIME as discussed]
    Signed-off-by: Dominique Martinet <[email protected]>
    Signed-off-by: Greg Kroah-Hartman <[email protected]>
    Christian Brauner authored and gregkh committed Jan 20, 2022
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  13. video: vga16fb: Only probe for EGA and VGA 16 color graphic cards

    commit 0499f41 upstream.
    
    The vga16fb framebuffer driver only supports Enhanced Graphics Adapter
    (EGA) and Video Graphics Array (VGA) 16 color graphic cards.
    
    But it doesn't check if the adapter is one of those or if a VGA16 mode
    is used. This means that the driver will be probed even if a VESA BIOS
    Extensions (VBE) or Graphics Output Protocol (GOP) interface is used.
    
    This issue has been present for a long time but it was only exposed by
    commit d391c58 ("drivers/firmware: move x86 Generic System
    Framebuffers support") since the platform device registration to match
    the {vesa,efi}fb drivers is done later as a consequence of that change.
    
    All non-x86 architectures though treat orig_video_isVGA as a boolean so
    only do the supported video mode check for x86 and not for other arches.
    
    Link: https://bugzilla.kernel.org/show_bug.cgi?id=215001
    Fixes: d391c58 ("drivers/firmware: move x86 Generic System Framebuffers support")
    Reported-by: Kris Karas <[email protected]>
    Cc: <[email protected]> # 5.15.x
    Signed-off-by: Javier Martinez Canillas <[email protected]>
    Tested-by: Kris Karas <[email protected]>
    Acked-by: Maxime Ripard <[email protected]>
    Link: https://patchwork.freedesktop.org/patch/msgid/[email protected]
    Signed-off-by: Greg Kroah-Hartman <[email protected]>
    martinezjavier authored and gregkh committed Jan 20, 2022
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  14. media: uvcvideo: fix division by zero at stream start

    commit 8aa637b upstream.
    
    Add the missing bulk-endpoint max-packet sanity check to
    uvc_video_start_transfer() to avoid division by zero in
    uvc_alloc_urb_buffers() in case a malicious device has broken
    descriptors (or when doing descriptor fuzz testing).
    
    Note that USB core will reject URBs submitted for endpoints with zero
    wMaxPacketSize but that drivers doing packet-size calculations still
    need to handle this (cf. commit 2548288 ("USB: Fix: Don't skip
    endpoint descriptors with maxpacket=0")).
    
    Fixes: c0efd23 ("V4L/DVB (8145a): USB Video Class driver")
    Cc: [email protected]      # 2.6.26
    Signed-off-by: Johan Hovold <[email protected]>
    Reviewed-by: Kieran Bingham <[email protected]>
    Signed-off-by: Laurent Pinchart <[email protected]>
    Signed-off-by: Mauro Carvalho Chehab <[email protected]>
    Signed-off-by: Greg Kroah-Hartman <[email protected]>
    jhovold authored and gregkh committed Jan 20, 2022
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  15. rtlwifi: rtl8192cu: Fix WARNING when calling local_irq_restore() with…

    … interrupts enabled
    
    commit 8b144de upstream.
    
    Syzbot reports the following WARNING:
    
    [200~raw_local_irq_restore() called with IRQs enabled
    WARNING: CPU: 1 PID: 1206 at kernel/locking/irqflag-debug.c:10
       warn_bogus_irq_restore+0x1d/0x20 kernel/locking/irqflag-debug.c:10
    
    Hardware initialization for the rtl8188cu can run for as long as 350 ms,
    and the routine may be called with interrupts disabled. To avoid locking
    the machine for this long, the current routine saves the interrupt flags
    and enables local interrupts. The problem is that it restores the flags
    at the end without disabling local interrupts first.
    
    This patch fixes commit a53268b ("rtlwifi: rtl8192cu: Fix too long
    disable of IRQs").
    
    Reported-by: [email protected]
    Cc: [email protected]
    Fixes: a53268b ("rtlwifi: rtl8192cu: Fix too long disable of IRQs")
    Signed-off-by: Larry Finger <[email protected]>
    Signed-off-by: Kalle Valo <[email protected]>
    Link: https://lore.kernel.org/r/[email protected]
    Signed-off-by: Greg Kroah-Hartman <[email protected]>
    lwfinger authored and gregkh committed Jan 20, 2022
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  16. firmware: qemu_fw_cfg: fix sysfs information leak

    commit 1b656e9 upstream.
    
    Make sure to always NUL-terminate file names retrieved from the firmware
    to avoid accessing data beyond the entry slab buffer and exposing it
    through sysfs in case the firmware data is corrupt.
    
    Fixes: 75f3e8e ("firmware: introduce sysfs driver for QEMU's fw_cfg device")
    Cc: [email protected]      # 4.6
    Cc: Gabriel Somlo <[email protected]>
    Signed-off-by: Johan Hovold <[email protected]>
    Link: https://lore.kernel.org/r/[email protected]
    Signed-off-by: Michael S. Tsirkin <[email protected]>
    Signed-off-by: Greg Kroah-Hartman <[email protected]>
    jhovold authored and gregkh committed Jan 20, 2022
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  17. firmware: qemu_fw_cfg: fix NULL-pointer deref on duplicate entries

    commit d3e3055 upstream.
    
    Commit fe3c606 ("firmware: Fix a reference count leak.") "fixed"
    a kobject leak in the file registration helper by properly calling
    kobject_put() for the entry in case registration of the object fails
    (e.g. due to a name collision).
    
    This would however result in a NULL pointer dereference when the
    release function tries to remove the never added entry from the
    fw_cfg_entry_cache list.
    
    Fix this by moving the list-removal out of the release function.
    
    Note that the offending commit was one of the benign looking umn.edu
    fixes which was reviewed but not reverted. [1][2]
    
    [1] https://lore.kernel.org/r/202105051005.49BFABCE@keescook
    [2] https://lore.kernel.org/all/[email protected]
    
    Fixes: fe3c606 ("firmware: Fix a reference count leak.")
    Cc: [email protected]      # 5.8
    Cc: Qiushi Wu <[email protected]>
    Cc: Kees Cook <[email protected]>
    Cc: Greg Kroah-Hartman <[email protected]>
    Signed-off-by: Johan Hovold <[email protected]>
    Link: https://lore.kernel.org/r/[email protected]
    Signed-off-by: Michael S. Tsirkin <[email protected]>
    Signed-off-by: Greg Kroah-Hartman <[email protected]>
    jhovold authored and gregkh committed Jan 20, 2022
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  18. firmware: qemu_fw_cfg: fix kobject leak in probe error path

    commit 47a1db8 upstream.
    
    An initialised kobject must be freed using kobject_put() to avoid
    leaking associated resources (e.g. the object name).
    
    Commit fe3c606 ("firmware: Fix a reference count leak.") "fixed"
    the leak in the first error path of the file registration helper but
    left the second one unchanged. This "fix" would however result in a NULL
    pointer dereference due to the release function also removing the never
    added entry from the fw_cfg_entry_cache list. This has now been
    addressed.
    
    Fix the remaining kobject leak by restoring the common error path and
    adding the missing kobject_put().
    
    Fixes: 75f3e8e ("firmware: introduce sysfs driver for QEMU's fw_cfg device")
    Cc: [email protected]      # 4.6
    Cc: Gabriel Somlo <[email protected]>
    Signed-off-by: Johan Hovold <[email protected]>
    Link: https://lore.kernel.org/r/[email protected]
    Signed-off-by: Greg Kroah-Hartman <[email protected]>
    Signed-off-by: Greg Kroah-Hartman <[email protected]>
    jhovold authored and gregkh committed Jan 20, 2022
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  19. perf annotate: Avoid TUI crash when navigating in the annotation of r…

    …ecursive functions
    
    commit d5962fb upstream.
    
    In 'perf report', entering a recursive function from inside of itself
    (either directly of indirectly through some other function) results in
    calling symbol__annotate2 multiple() times, and freeing the whole
    disassembly when exiting from the innermost instance.
    
    The first issue causes the function's disassembly to be duplicated, and
    the latter a heap use-after-free (and crash) when trying to access the
    disassembly again.
    
    I reproduced the bug on perf 5.11.22 (Ubuntu 20.04.3 LTS) and 5.16.rc8
    with the following testcase (compile with gcc recursive.c -o recursive).
    To reproduce:
    
    - perf record ./recursive
    - perf report
    - enter fibonacci and annotate it
    - move the cursor on one of the "callq fibonacci" instructions and press enter
      - at this point there will be two copies of the function in the disassembly
    - go back by pressing q, and perf will crash
    
      #include <stdio.h>
    
      int fibonacci(int n)
      {
          if(n <= 2) return 1;
          return fibonacci(n-1) + fibonacci(n-2);
      }
    
      int main()
      {
          printf("%d\n", fibonacci(40));
      }
    
    This patch addresses the issue by annotating a function and freeing the
    associated memory on exit only if no annotation is already present, so
    that a recursive function is only annotated on entry.
    
    Signed-off-by: Dario Petrillo <[email protected]>
    Tested-by: Arnaldo Carvalho de Melo <[email protected]>
    Cc: Alexander Shishkin <[email protected]>
    Cc: Jiri Olsa <[email protected]>
    Cc: Mark Rutland <[email protected]>
    Cc: Namhyung Kim <[email protected]>
    Cc: Peter Zijlstra <[email protected]>
    Cc: [email protected]
    Link: http://lore.kernel.org/lkml/[email protected]
    Signed-off-by: Arnaldo Carvalho de Melo <[email protected]>
    Signed-off-by: Greg Kroah-Hartman <[email protected]>
    dp1 authored and gregkh committed Jan 20, 2022
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  20. KVM: x86: remove PMU FIXED_CTR3 from msrs_to_save_all

    commit 9fb12fe upstream.
    
    The fixed counter 3 is used for the Topdown metrics, which hasn't been
    enabled for KVM guests. Userspace accessing to it will fail as it's not
    included in get_fixed_pmc(). This breaks KVM selftests on ICX+ machines,
    which have this counter.
    
    To reproduce it on ICX+ machines, ./state_test reports:
    ==== Test Assertion Failure ====
    lib/x86_64/processor.c:1078: r == nmsrs
    pid=4564 tid=4564 - Argument list too long
    1  0x000000000040b1b9: vcpu_save_state at processor.c:1077
    2  0x0000000000402478: main at state_test.c:209 (discriminator 6)
    3  0x00007fbe21ed5f92: ?? ??:0
    4  0x000000000040264d: _start at ??:?
     Unexpected result from KVM_GET_MSRS, r: 17 (failed MSR was 0x30c)
    
    With this patch, it works well.
    
    Signed-off-by: Wei Wang <[email protected]>
    Message-Id: <[email protected]>
    Signed-off-by: Paolo Bonzini <[email protected]>
    Fixes: e2ada66 ("kvm: x86: Add Intel PMU MSRs to msrs_to_save[]")
    Signed-off-by: Greg Kroah-Hartman <[email protected]>
    wei-w-wang authored and gregkh committed Jan 20, 2022
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  21. ALSA: hda/realtek: Add speaker fixup for some Yoga 15ITL5 devices

    commit 6dc8697 upstream.
    
    This patch adds another possible subsystem ID for the ALC287 used by
    the Lenovo Yoga 15ITL5.
    It uses the same initalization as the others.
    This patch has been tested and works for my device.
    
    Signed-off-by: Arie Geiger <[email protected]>
    Cc: <[email protected]>
    Link: https://lore.kernel.org/r/[email protected]
    Signed-off-by: Takashi Iwai <[email protected]>
    Signed-off-by: Greg Kroah-Hartman <[email protected]>
    Arie Geiger authored and gregkh committed Jan 20, 2022
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  22. ALSA: hda/realtek: Use ALC285_FIXUP_HP_GPIO_LED on another HP laptop

    commit 08977fe upstream.
    
    The audio mute and mic mute LEDs don't work, so use the quirk to make
    them work.
    
    Signed-off-by: Kai-Heng Feng <[email protected]>
    Cc: <[email protected]>
    Link: https://lore.kernel.org/r/[email protected]
    Signed-off-by: Takashi Iwai <[email protected]>
    Signed-off-by: Greg Kroah-Hartman <[email protected]>
    khfeng authored and gregkh committed Jan 20, 2022
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  23. ALSA: hda/realtek - Fix silent output on Gigabyte X570 Aorus Master a…

    …fter reboot from Windows
    
    commit c193300 upstream.
    
    This patch addresses an issue where after rebooting from Windows into Linux
    there would be no audio output.
    
    It turns out that the Realtek Audio driver on Windows changes some coeffs
    which are not being reset/reinitialized when rebooting the machine. As a
    result, there is no audio output until these coeffs are being reset to
    their initial state. This patch takes care of that by setting known-good
    (initial) values to the coeffs.
    
    We initially relied upon alc1220_fixup_clevo_p950() to fix some pins in the
    connection list. However, it also sets coef 0x7 which does not need to be
    touched. Furthermore, to prevent mixing device-specific quirks I introduced
    a new alc1220_fixup_gb_x570() which is heavily based on
    alc1220_fixup_clevo_p950() but does not set coeff 0x7 and fixes the coeffs
    that are actually needed instead.
    
    This new alc1220_fixup_gb_x570() is believed to also work for other boards,
    like the Gigabyte X570 Aorus Extreme and the newer Gigabyte Aorus X570S
    Master. However, as there is no way for me to test these I initially only
    enable this new behaviour for the mainboard I have which is the Gigabyte
    X570(non-S) Aorus Master.
    
    I tested this patch on the 5.15 branch as well as on master and it is
    working well for me.
    
    BugLink: https://bugzilla.kernel.org/show_bug.cgi?id=205275
    Signed-off-by: Christian Lachner <[email protected]>
    Fixes: 0d45e86 ("ALSA: hda/realtek - Fix silent output on Gigabyte X570 Aorus Master")
    Cc: <[email protected]>
    Link: https://lore.kernel.org/r/[email protected]
    Signed-off-by: Takashi Iwai <[email protected]>
    Signed-off-by: Greg Kroah-Hartman <[email protected]>
    gladiac authored and gregkh committed Jan 20, 2022
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  24. ALSA: hda: ALC287: Add Lenovo IdeaPad Slim 9i 14ITL5 speaker quirk

    commit b81e9e5 upstream.
    
    The speaker fixup that is used for the Yoga 7 14ITL5 also applies to
    the IdeaPad Slim 9i 14ITL5. The attached patch applies the quirk to
    initialise the amplifier on the IdeaPad Slim 9i as well.
    
    This is validated to work on my laptop.
    
    [ corrected the quirk entry position by tiwai ]
    
    Signed-off-by: Bart Kroon <[email protected]>
    Cc: <[email protected]>
    Link: https://lore.kernel.org/r/[email protected]
    Signed-off-by: Takashi Iwai <[email protected]>
    Signed-off-by: Greg Kroah-Hartman <[email protected]>
    tarmack authored and gregkh committed Jan 20, 2022
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  25. ALSA: hda/tegra: Fix Tegra194 HDA reset failure

    commit d278dc9 upstream.
    
    HDA regression is recently reported on Tegra194 based platforms.
    This happens because "hda2codec_2x" reset does not really exist
    in Tegra194 and it causes probe failure. All the HDA based audio
    tests fail at the moment. This underlying issue is exposed by
    commit c045ceb ("reset: tegra-bpmp: Handle errors in BPMP
    response") which now checks return code of BPMP command response.
    Fix this issue by skipping unavailable reset on Tegra194.
    
    Cc: [email protected]
    Signed-off-by: Sameer Pujar <[email protected]>
    Reviewed-by: Dmitry Osipenko <[email protected]>
    Link: https://lore.kernel.org/r/[email protected]
    Signed-off-by: Takashi Iwai <[email protected]>
    Signed-off-by: Greg Kroah-Hartman <[email protected]>
    pujars authored and gregkh committed Jan 20, 2022
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  26. ALSA: hda/realtek: Add quirk for Legion Y9000X 2020

    commit 8f4c904 upstream.
    
    Legion Y9000X 2020 has a speaker, but the speaker doesn't work.
    This can be fixed by applying alc285_fixup_ideapad_s740_coef
    to fix the speaker's coefficients.
    Besides, to support the transition between the speaker and the headphone,
    alc287_fixup_legion_15imhg05_speakers needs to be run.
    
    Signed-off-by: Baole Fang <[email protected]>
    Cc: <[email protected]>
    Link: https://lore.kernel.org/r/[email protected]
    Signed-off-by: Takashi Iwai <[email protected]>
    Signed-off-by: Greg Kroah-Hartman <[email protected]>
    fbl718 authored and gregkh committed Jan 20, 2022
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  27. ALSA: hda/realtek: Re-order quirk entries for Lenovo

    commit 2aac550 upstream.
    
    The recent few quirk entries for Lenovo haven't been put in the right
    order.  Let's arrange the table again.
    
    Fixes: ad7cc2d ("ALSA: hda/realtek: Quirks to enable speaker output...")
    Fixes: 6dc8697 ("ALSA: hda/realtek: Add speaker fixup for some Yoga 15ITL5 devices")
    Fixes: 8f4c904 ("ALSA: hda/realtek: Add quirk for Legion Y9000X 2020")
    Cc: <[email protected]>
    Signed-off-by: Takashi Iwai <[email protected]>
    Signed-off-by: Greg Kroah-Hartman <[email protected]>
    tiwai authored and gregkh committed Jan 20, 2022
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  28. mtd: fixup CFI on ixp4xx

    commit 603362b upstream.
    
    drivers/mtd/maps/ixp4xx.c requires MTD_CFI_BE_BYTE_SWAP to be set
    in order to compile.
    
    drivers/mtd/maps/ixp4xx.c:57:4: error: #error CONFIG_MTD_CFI_BE_BYTE_SWAP required
    
    This patch avoids the #error output by enforcing the policy in
    Kconfig. Not sure if this is the right approach, but it helps doing
    randconfig builds.
    
    Signed-off-by: Arnd Bergmann <[email protected]>
    Acked-by: Linus Walleij <[email protected]>
    Signed-off-by: Miquel Raynal <[email protected]>
    Link: https://lore.kernel.org/linux-mtd/[email protected]
    Cc: Anders Roxell <[email protected]>
    Signed-off-by: Greg Kroah-Hartman <[email protected]>
    arndb authored and gregkh committed Jan 20, 2022
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  29. Linux 5.15.16

    Link: https://lore.kernel.org/r/[email protected]
    Tested-by: Florian Fainelli <[email protected]>
    Tested-by: Jon Hunter <[email protected]>
    Tested-by: Shuah Khan <[email protected]>
    Tested-by: Ron Economos <[email protected]>
    Tested-by: Linux Kernel Functional Testing <[email protected]>
    Tested-by: Guenter Roeck <[email protected]>
    Signed-off-by: Greg Kroah-Hartman <[email protected]>
    gregkh committed Jan 20, 2022
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  30. Merge tag 'v5.15.16' into 5.15.x+fslc

    This is the 5.15.16 stable release
    
    Signed-off-by: Andrey Zhizhikin <[email protected]>
    zandrey committed Jan 20, 2022
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