]> www.infradead.org Git - users/jedix/linux-maple.git/commit
KVM: arm64: Fix buffer overflow in kvm_arm_set_fw_reg()
authorDan Carpenter <dan.carpenter@linaro.org>
Wed, 19 Apr 2023 10:16:13 +0000 (13:16 +0300)
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>
Wed, 26 Apr 2023 12:28:42 +0000 (14:28 +0200)
commit8d6a870a428f3164dc437d183077c40e835c8fcb
treef9e69dcf1c5d0773fc6ce2a4d4ba506fb7c86ae4
parent9e7976c0cd634e23dda2b6849f33f44e5cbd4728
KVM: arm64: Fix buffer overflow in kvm_arm_set_fw_reg()

commit a25bc8486f9c01c1af6b6c5657234b2eee2c39d6 upstream.

The KVM_REG_SIZE() comes from the ioctl and it can be a power of two
between 0-32768 but if it is more than sizeof(long) this will corrupt
memory.

Fixes: 99adb567632b ("KVM: arm/arm64: Add save/restore support for firmware workaround state")
Signed-off-by: Dan Carpenter <dan.carpenter@linaro.org>
Reviewed-by: Steven Price <steven.price@arm.com>
Reviewed-by: Eric Auger <eric.auger@redhat.com>
Reviewed-by: Marc Zyngier <maz@kernel.org>
Link: https://lore.kernel.org/r/4efbab8c-640f-43b2-8ac6-6d68e08280fe@kili.mountain
Signed-off-by: Oliver Upton <oliver.upton@linux.dev>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
arch/arm64/kvm/hypercalls.c