On Fri, Jun 8, 2018 at 2:57 PM Matthew Garrett <mjg59@xxxxxxxxxx> wrote: > > When EVM attempts to appraise a file signed with a crypto algorithm the > kernel doesn't have support for, it will cause the kernel to trigger a > module load. If the EVM policy includes appraisal of kernel modules this > will in turn call back into EVM - since EVM is holding a lock until the > crypto initialisation is complete, this triggers a deadlock. Add a > CRYPTO_NOLOAD flag and skip module loading if it's set, and add that flag > in the EVM case in order to fail gracefully with an error message > instead of deadlocking. Hi Herbert, Does this explain the problem sufficiently?
