Hi! > From: Josh Poimboeuf <[email protected]> > > commit 98d0c8ebf77e0ba7c54a9ae05ea588f0e9e3f46e upstream. > > If the unwinder is called before the ORC data has been initialized, > orc_find() returns NULL, and it tries to fall back to using frame > pointers. This can cause some unexpected warnings during boot. > > Move the 'orc_init' check from orc_find() to __unwind_init(), so that it > doesn't even try to unwind from an uninitialized state.
> @@ -563,6 +560,9 @@ EXPORT_SYMBOL_GPL(unwind_next_frame);
> void __unwind_start(struct unwind_state *state, struct task_struct *task,
> struct pt_regs *regs, unsigned long *first_frame)
> {
> + if (!orc_init)
> + goto done;
> +
> memset(state, 0, sizeof(*state));
> state->task = task;
>
As this returns the *state to the caller, should the "goto done" move
below the memset? Otherwise we are returning partialy-initialized
struct, which is ... weird.
Best regards,
Pavel
--
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