On Thu, 04 Sep 2025 20:22:36 -0700, panfan wrote:
> On arm64, it has been possible for a module's sections to be placed more
> than 128M away from each other since commit:
>
> commit 3e35d303ab7d ("arm64: module: rework module VA range selection")
>
> Due to this, an ftrace callsite in a module's .init.text section can be
> out of branch range for the module's ftrace PLT entry (in the module's
> .text section). Any attempt to enable tracing of that callsite will
> result in a BRK being patched into the callsite, resulting in a fatal
> exception when the callsite is later executed.
>
> [...]
Applied to arm64 (for-next/fixes), thanks!
[1/1] arm64: ftrace: fix unreachable PLT for ftrace_caller in init_module with
CONFIG_DYNAMIC_FTRACE
https://git.kernel.org/arm64/c/a7ed7b9d0ebb
--
Catalin
