Re: [PATCH bpf v2 2/2] selftests/bpf: add verifier test for PTR_TO_MEM spill

On 1/12/21 9:38 PM, Gilad Reti wrote:

Add a test to check that the verifier is able to recognize spilling of PTR_TO_MEM registers, by reserving a ringbuf buffer, forcing the spill of a pointer holding the buffer address to the stack, filling it back in from the stack and writing to the memory area pointed by it.

The patch was partially contributed by CyberArk Software, Inc.

Signed-off-by: Gilad Reti gilad.reti@gmail.com

I didn't verify result_unpriv = ACCEPT part. I think it is correct by checking code.

Acked-by: Yonghong Song yhs@fb.com