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(parent: af18ca9) | patch
arm: read/write rank->vcpu atomically
authorStefano Stabellini <sstabellini@kernel.org>
Sat, 11 Feb 2017 02:05:22 +0000 (18:05 -0800)
committerStefano Stabellini <sstabellini@kernel.org>
Thu, 16 Mar 2017 20:59:51 +0000 (13:59 -0700)
commitc75fe6473b73705c9b9f7d8ecc3d043afef55727
tree1a6bc63b577d2c840373c14f4e6ec0fc50bd51datree | snapshot
parentaf18ca94f3fdbea87687c07ba532269dbb483e64commit | diff
arm: read/write rank->vcpu atomically

We don't need a lock in vgic_get_target_vcpu anymore, solving the
following lock inversion bug: the rank lock should be taken first, then
the vgic lock. However, gic_update_one_lr is called with the vgic lock
held, and it calls vgic_get_target_vcpu, which tries to obtain the rank
lock.

Coverity-ID: 1381855
Coverity-ID: 1381853

Signed-off-by: Stefano Stabellini <sstabellini@kernel.org>
Reviewed-by: Julien Grall <julien.grall@arm.com>
xen/arch/arm/vgic-v2.c diff | blob | history
xen/arch/arm/vgic-v3.c diff | blob | history
xen/arch/arm/vgic.c diff | blob | history
xen/include/asm-arm/vgic.h diff | blob | history
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