Re: [RFC v3 0/2] rm64: kprobes: Fix single-step fault and reentry handling
Will Deacon <[email protected]>
| Newsgroups | org.kernel.vger.linux-trace-kernel,org.infradead.lists.linux-arm-kernel,org.kernel.vger.linux-kernel |
|---|---|
| Message-ID | <[email protected]> |
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