Re: [RFC v3 0/2] rm64: kprobes: Fix single-step fault and reentry handling

[Will Deacon]

On Fri, 10 Jul 2026 06:32:52 +0000, Pu Hu wrote:
> This series fixes two arm64 kprobes issues observed when running
> simpleperf with preemptirq tracepoints and dwarf callchains while a
> kprobe is active on a frequently executed kernel function.
> 
> The crash happens in the kprobe debug exception path. While a kprobe is
> preparing or executing its XOL single-step instruction, perf/trace code
> can run in the same window. That code may either take a fault of its own
> or hit another kprobe.
> 
> [...]

Applied to arm64 (for-next/fixes), thanks!

[1/2] arm64: kprobes: Only handle faults originating from XOL slot
      https://git.kernel.org/arm64/c/879a6754d3d1
[2/2] arm64: kprobes: Allow reentering kprobes while single-stepping
      https://git.kernel.org/arm64/c/23f851ac0078

Cheers,
-- 
Will

https://fixes.arm64.dev
https://next.arm64.dev
https://will.arm64.dev