KVM: arm64: vgic-its: Add a data length check in vgic_its_save_*

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commit 7fe28d7e68 upstream.

In all the vgic_its_save_*() functinos, they do not check whether
the data length is 8 bytes before calling vgic_write_guest_lock.
This patch adds the check. To prevent the kernel from being blown up
when the fault occurs, KVM_BUG_ON() is used. And the other BUG_ON()s
are replaced together.

Cc: stable@vger.kernel.org
Signed-off-by: Kunkun Jiang <jiangkunkun@huawei.com>
[Jing: Update with the new entry read/write helpers]
Signed-off-by: Jing Zhang <jingzhangos@google.com>
Link: https://lore.kernel.org/r/20241107214137.428439-4-jingzhangos@google.com
Signed-off-by: Oliver Upton <oliver.upton@linux.dev>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

...

This commit is contained in:

Jing Zhang 2024-12-04 12:23:55 -08:00 • committed by Greg Kroah-Hartman

parent eed8395d94

commit cb35445052

2 changed files with 32 additions and 12 deletions

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20

arch/arm64/kvm/vgic/vgic-its.c

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24

arch/arm64/kvm/vgic/vgic.h

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