8 Nov
2017
8 Nov
'17
12:50 p.m.
Eric Biggers ebiggers3@gmail.com wrote:
On a non-preemptible kernel, if KEYCTL_DH_COMPUTE is called with the largest permitted inputs (16384 bits), the kernel spends 10+ seconds doing modular exponentiation in mpi_powm() without rescheduling. If all threads do it, it locks up the system. Moreover, it can cause rcu_sched-stall warnings.
Do you want this to go in immediately, or I should I push it to James for the next merge window?
David