KVM: s390: selftest: memop: Fix undefined behavior

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If an integer's type has x bits, shifting the integer left by x or more
is undefined behavior.
This can happen in the rotate function when attempting to do a rotation
of the whole value by 0.

Fixes: 0dd714bfd2 ("KVM: s390: selftest: memop: Add cmpxchg tests")
Signed-off-by: Nina Schoetterl-Glausch <nsg@linux.ibm.com>
Link: https://lore.kernel.org/r/20240111094805.363047-1-nsg@linux.ibm.com
Acked-by: Janosch Frank <frankja@linux.ibm.com>
Signed-off-by: Janosch Frank <frankja@linux.ibm.com>
Message-Id: <20240111094805.363047-1-nsg@linux.ibm.com>

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Nina Schoetterl-Glausch 2024-01-11 10:48:05 +01:00 • committed by Janosch Frank

parent 85a19b3054

commit 00de073e24

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tools/testing/selftests/kvm/s390x/memop.c

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