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Filename Latest commit message Latest commit date
Li RongQing 4c277c846a KVM: x86: fix sending PV IPI
commit c15e0ae42c8e5a61e9aca8aac920517cf7b3e94e upstream.

If apic_id is less than min, and (max - apic_id) is greater than
KVM_IPI_CLUSTER_SIZE, then the third check condition is satisfied but
the new apic_id does not fit the bitmask.  In this case __send_ipi_mask
should send the IPI.

This is mostly theoretical, but it can happen if the apic_ids on three
iterations of the loop are for example 1, KVM_IPI_CLUSTER_SIZE, 0.

Fixes: aaffcfd1e8 ("KVM: X86: Implement PV IPIs in linux guest")
Signed-off-by: Li RongQing <lirongqing@baidu.com>
Message-Id: <1646814944-51801-1-git-send-email-lirongqing@baidu.com>
Cc: stable@vger.kernel.org
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2022-04-15 14:18:27 +02:00
arch KVM: x86: fix sending PV IPI 2022-04-15 14:18:27 +02:00
block Revert "Revert "block, bfq: honor already-setup queue merges"" 2022-04-15 14:18:23 +02:00
certs
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Documentation ALSA: hda/realtek: Add alc256-samsung-headphone fixup 2022-04-15 14:18:25 +02:00
drivers scsi: qla2xxx: Use correct feature type field during RFF_ID processing 2022-04-15 14:18:27 +02:00
fs ntfs: add sanity check on allocation size 2022-04-15 14:18:23 +02:00
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lib lib/raid6/test/Makefile: Use $(pound) instead of \# for Make 4.3 2022-04-15 14:18:23 +02:00
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sound ALSA: hda/realtek: Add alc256-samsung-headphone fixup 2022-04-15 14:18:25 +02:00
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virt KVM: Prevent module exit until all VMs are freed 2022-04-15 14:18:27 +02:00
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Linux kernel
============

There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.

In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``.  The formatted documentation can also be read online at:

    https://www.kernel.org/doc/html/latest/

There are various text files in the Documentation/ subdirectory,
several of them using the Restructured Text markup notation.

Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.