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linux_dsm_epyc7002/arch
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Peter Gonda 4f627ecde7 Fix unsynchronized access to sev members through svm_register_enc_region 
commit 19a23da53932bc8011220bd8c410cb76012de004 upstream.

Grab kvm->lock before pinning memory when registering an encrypted
region; sev_pin_memory() relies on kvm->lock being held to ensure
correctness when checking and updating the number of pinned pages.

Add a lockdep assertion to help prevent future regressions.

Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Cc: Paolo Bonzini <pbonzini@redhat.com>
Cc: Joerg Roedel <joro@8bytes.org>
Cc: Tom Lendacky <thomas.lendacky@amd.com>
Cc: Brijesh Singh <brijesh.singh@amd.com>
Cc: Sean Christopherson <seanjc@google.com>
Cc: x86@kernel.org
Cc: kvm@vger.kernel.org
Cc: stable@vger.kernel.org
Cc: linux-kernel@vger.kernel.org
Fixes: 1e80fdc09d ("KVM: SVM: Pin guest memory when SEV is active")
Signed-off-by: Peter Gonda <pgonda@google.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

V2
 - Fix up patch description
 - Correct file paths svm.c -> sev.c
 - Add unlock of kvm->lock on sev_pin_memory error

V1
 - https://lore.kernel.org/kvm/20210126185431.1824530-1-pgonda@google.com/

Message-Id: <20210127161524.2832400-1-pgonda@google.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2021-02-10 09:29:18 +01:00
..
alpha local64.h: make <asm/local64.h> mandatory 2021-01-12 20:18:16 +01:00
arc arch/arc: add copy_user_page() to <asm/page.h> to fix build error on ARC 2021-01-19 18:27:26 +01:00
arm ARM: dts: sun7i: a20: bananapro: Fix ethernet phy-mode 2021-02-10 09:29:15 +01:00
arm64 arm64: dts: ls1046a: fix dcfg address range 2021-02-10 09:29:13 +01:00
c6x arch-cleanup-2020-10-22 2020-10-23 10:06:38 -07:00
csky local64.h: make <asm/local64.h> mandatory 2021-01-12 20:18:16 +01:00
h8300 local64.h: make <asm/local64.h> mandatory 2021-01-12 20:18:16 +01:00
hexagon local64.h: make <asm/local64.h> mandatory 2021-01-12 20:18:16 +01:00
ia64 local64.h: make <asm/local64.h> mandatory 2021-01-12 20:18:16 +01:00
m68k local64.h: make <asm/local64.h> mandatory 2021-01-12 20:18:16 +01:00
microblaze local64.h: make <asm/local64.h> mandatory 2021-01-12 20:18:16 +01:00
mips MIPS: relocatable: fix possible boot hangup with KASLR enabled 2021-01-19 18:27:20 +01:00
nds32 local64.h: make <asm/local64.h> mandatory 2021-01-12 20:18:16 +01:00
nios2 sched/idle: Fix arch_cpu_idle() vs tracing 2020-11-24 16:47:35 +01:00
openrisc sched/idle: Fix arch_cpu_idle() vs tracing 2020-11-24 16:47:35 +01:00
parisc parisc: Enable -mlong-calls gcc option by default when !CONFIG_MODULES 2021-02-03 23:28:37 +01:00
powerpc powerpc/64s: prevent recursive replay_soft_interrupts causing superfluous interrupt 2021-02-03 23:28:46 +01:00
riscv RISC-V: Define MAXPHYSMEM_1GB only for RV32 2021-02-10 09:29:17 +01:00
s390 s390: uv: Fix sysfs max number of VCPUs reporting 2021-02-03 23:28:39 +01:00
sh sh: Remove unused HAVE_COPY_THREAD_TLS macro 2021-01-27 11:55:20 +01:00
sparc local64.h: make <asm/local64.h> mandatory 2021-01-12 20:18:16 +01:00
um um: virtio: free vu_dev only with the contained struct device 2021-02-10 09:29:12 +01:00
x86 Fix unsynchronized access to sev members through svm_register_enc_region 2021-02-10 09:29:18 +01:00
xtensa local64.h: make <asm/local64.h> mandatory 2021-01-12 20:18:16 +01:00
.gitignore
Kconfig fanotify: Fix sys_fanotify_mark() on native x86-32 2021-01-17 14:16:59 +01:00