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author | Heyi Guo <guoheyi@huawei.com> | 2019-08-27 12:26:50 +0100 |
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committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2019-09-06 10:23:41 +0200 |
commit | ea93e118ef2eb04b348f2c65149665533ea9b1e6 (patch) | |
tree | f7ab179cf66a22d057c7e17d836a846210dfc8bc /include/asm-generic/int-ll64.h | |
parent | d69ebe85e16908698844c40f08d3d1dba417405c (diff) | |
download | linux-stable-ea93e118ef2eb04b348f2c65149665533ea9b1e6.tar.gz linux-stable-ea93e118ef2eb04b348f2c65149665533ea9b1e6.tar.bz2 linux-stable-ea93e118ef2eb04b348f2c65149665533ea9b1e6.zip |
KVM: arm/arm64: vgic: Fix potential deadlock when ap_list is long
commit d4a8061a7c5f7c27a2dc002ee4cb89b3e6637e44 upstream.
If the ap_list is longer than 256 entries, merge_final() in list_sort()
will call the comparison callback with the same element twice, causing
a deadlock in vgic_irq_cmp().
Fix it by returning early when irqa == irqb.
Cc: stable@vger.kernel.org # 4.7+
Fixes: 8e4447457965 ("KVM: arm/arm64: vgic-new: Add IRQ sorting")
Signed-off-by: Zenghui Yu <yuzenghui@huawei.com>
Signed-off-by: Heyi Guo <guoheyi@huawei.com>
[maz: massaged commit log and patch, added Fixes and Cc-stable]
Signed-off-by: Marc Zyngier <maz@kernel.org>
Signed-off-by: Will Deacon <will@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'include/asm-generic/int-ll64.h')
0 files changed, 0 insertions, 0 deletions