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Commit 05fb3dbd authored by Robin Murphy's avatar Robin Murphy Committed by Will Deacon
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arm64: csum: Fix handling of bad packets



Although iph is expected to point to at least 20 bytes of valid memory,
ihl may be bogus, for example on reception of a corrupt packet. If it
happens to be less than 5, we really don't want to run away and
dereference 16GB worth of memory until it wraps back to exactly zero...

Fixes: 0e455d8e ("arm64: Implement optimised IP checksum helpers")
Reported-by: default avatarguodeqing <geffrey.guo@huawei.com>
Signed-off-by: default avatarRobin Murphy <robin.murphy@arm.com>
Signed-off-by: default avatarWill Deacon <will@kernel.org>
parent 835d1c3a
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