On Mon, May 22, 2023 at 10:33:44PM +0200, Jiri Olsa wrote: > hi, > we see broken access to user space with bpf_probe_read/bpf_probe_read_str > helpers on arm64 with 5.4 kernel. The problem is that both helpers try to > read user memory by calling probe_kernel_read, which seems to work on x86 > but fails on arm64. Has this ever worked on arm64 for the 5.4 kernel tree? If not, it's not really a regression, and so, why not use a newer kernel that has this new feature added to it there? In other words, what requires you to use the 5.4.y tree and requires feature parity across architectures? thanks, greg k-h
