[RFC PATCH] bpftrace cannot read paths on arm64 5.4 kernels

[Bogdan HARJOC]

Internal Use Only

Hello,

for reading usermode addresses on arm64, bpftrace needs the newer bpf_probe_read_user() helper, while on x86_64 the older bpf_probe_read() helper works for both user and kernel addresses.

bpf_probe_read_user() is available since linux-5.5, and was backported to Ubuntu 5.4-azure kernels in 2022:

Can the same patch be applied to 5.4-generic kernels as well ?

kernel-team [PATCH] thread with details:
https://lists.ubuntu.com/archives/kernel-team/2022-September/133038.html

Launchpad bug for this fix:
https://bugs.launchpad.net/ubuntu/+source/linux-azure/+bug/1990009

Thanks,
Bogdan
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