On Thu, Jun 11, 2020 at 8:26 PM Andy Lutomirski wrote:
>
> If we BUG or WARN in a funny RCU context, we cleverly optimize the
> BUG/WARN using the ud2 hack, which takes us through the
> idtentry_enter...() paths, which might helpfully WARN that the RCU
> context is invalid, which results in infini
If we BUG or WARN in a funny RCU context, we cleverly optimize the
BUG/WARN using the ud2 hack, which takes us through the
idtentry_enter...() paths, which might helpfully WARN that the RCU
context is invalid, which results in infinite recursion.
Split the BUG/WARN handling into an nmi_enter()/nmi
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