arm64: Don't walk page table for user faults in do_mem_abort
Commit 42dbf54e ("arm64: consistently log ESR and page table") dumps page table entries for user faults hitting do_bad entries in the fault handler table. Whilst this shouldn't really happen in practice, it's not beyond the realms of possibility if e.g. running an old kernel on a new CPU. Generally, we want to avoid exposing physical addresses under the control of userspace (see commit bf396c09 ("arm64: mm: don't print out page table entries on EL0 faults")), so walk the page tables only on exceptions from EL1. Reported-by: Kristina Martsenko <kristina.martsenko@arm.com> Signed-off-by: Will Deacon <will.deacon@arm.com>
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