tree a1667f46fd808cbd904eb5ccbabca4c35c48dde3
parent 3aa4b37d3e899cfe7a9cbdcda2b277df4c1f210d
author Thomas Gleixner <tglx@linutronix.de> 1202333983 +0100
committer Ingo Molnar <mingo@elte.hu> 1202333983 +0100

x86: make spurious fault handler aware of large mappings

In very rare cases, on certain CPUs, we could end up in the spurious
fault handler and ignore a large pud/pmd mapping. The resulting pte
pointer points into the mapped physical space and dereferencing it
will fault recursively.

Make the code aware of large mappings and do the permission check
on the pmd/pud entry, when a large pud/pmd mapping is detected.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Ingo Molnar <mingo@elte.hu>