diff options
| author | Matt Delco <delco@chromium.org> | 2019-09-16 14:16:54 -0700 |
|---|---|---|
| committer | Paolo Bonzini <pbonzini@redhat.com> | 2019-09-18 15:56:55 +0200 |
| commit | b60fe990c6b07ef6d4df67bc0530c7c90a62623a (patch) | |
| tree | 49d837232351e9b86c9632ccc509f26596e269ed /virt/kvm/arm/vgic/vgic-v2.c | |
| parent | a9c20bb0206ae9384bd470a6832dd8913730add9 (diff) | |
KVM: coalesced_mmio: add bounds checking
The first/last indexes are typically shared with a user app.
The app can change the 'last' index that the kernel uses
to store the next result. This change sanity checks the index
before using it for writing to a potentially arbitrary address.
This fixes CVE-2019-14821.
Cc: stable@vger.kernel.org
Fixes: 5f94c1741bdc ("KVM: Add coalesced MMIO support (common part)")
Signed-off-by: Matt Delco <delco@chromium.org>
Signed-off-by: Jim Mattson <jmattson@google.com>
Reported-by: syzbot+983c866c3dd6efa3662a@syzkaller.appspotmail.com
[Use READ_ONCE. - Paolo]
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Diffstat (limited to 'virt/kvm/arm/vgic/vgic-v2.c')
0 files changed, 0 insertions, 0 deletions