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Ilya Leoshkevich 400dd40fd2 s390/bpf: Fix optimizing out zero-extensions ... commit db7bee653859ef7179be933e7d1384644f795f26 upstream. Currently the JIT completely removes things like `reg32 += 0`, however, the BPF_ALU semantics requires the target register to be zero-extended in such cases. Fix by optimizing out only the arithmetic operation, but not the subsequent zero-extension. Reported-by: Johan Almbladh <johan.almbladh@anyfinetworks.com> Fixes: 0546231057 ("s390/bpf: Add s390x eBPF JIT compiler backend") Reviewed-by: Heiko Carstens <hca@linux.ibm.com> Signed-off-by: Ilya Leoshkevich <iii@linux.ibm.com> Signed-off-by: Vasily Gorbik <gor@linux.ibm.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Change-Id: Ic4d7eca7216d5b401ec0eda4f8fc2c89b130b793		11 months ago
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Makefile	…
bpf_jit.S	…
bpf_jit.h	…
bpf_jit_comp.c	s390/bpf: Fix optimizing out zero-extensions	11 months ago