linux

iv/linux

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Sean Christopherson ed8bbe6627 KVM: Grab a reference to KVM for VM and vCPU stats file descriptors

commit eed3013faa401aae662398709410a59bb0646e32 upstream.

Grab a reference to KVM prior to installing VM and vCPU stats file
descriptors to ensure the underlying VM and vCPU objects are not freed
until the last reference to any and all stats fds are dropped.

Note, the stats paths manually invoke fd_install() and so don't need to
grab a reference before creating the file.

Fixes: ce55c049459c ("KVM: stats: Support binary stats retrieval for a VCPU")
Fixes: fcfe1baeddbf ("KVM: stats: Support binary stats retrieval for a VM")
Reported-by: Zheng Zhang <zheng.zhang@email.ucr.edu>
Closes: https://lore.kernel.org/all/CAC_GQSr3xzZaeZt85k_RCBd5kfiOve8qXo7a81Cq53LuVQ5r=Q@mail.gmail.com
Cc: stable@vger.kernel.org
Cc: Kees Cook <keescook@chromium.org>
Signed-off-by: Sean Christopherson <seanjc@google.com>
Reviewed-by: Kees Cook <keescook@chromium.org>
Message-Id: <20230711230131.648752-2-seanjc@google.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

2023-08-03 10:24:08 +02:00

async_pf.c

KVM: Add helpers to wake/query blocking vCPU

2021-12-08 04:24:54 -05:00

async_pf.h

treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 504

2019-06-19 17:09:56 +02:00

binary_stats.c

KVM: stats: remove dead stores

2021-08-13 03:35:15 -04:00

coalesced_mmio.c

KVM: Destroy target device if coalesced MMIO unregistration fails