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6e0de81759
The A register needs to be initialized to zero in the prolog if the first instruction of the BPF program is BPF_S_LDX_B_MSH to prevent leaking the content of %r5 to user space. Cc: <stable@vger.kernel.org> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>