Scott Wood wrote:

Scott Wood wrote:

quoted

Nathan Lynch wrote:

quoted

Is the crashing program multithreaded?  The first report had firefox
triggering the oops.

=20
OK, I've got a test program that triggers it now.  I'll see if I can
figure out what's going on.

=20
The problem seems to be that update_mmu_cache() is called on a guard
page with no access rights.=20
=20
Changing update_mmu_cache() to always call flush_dcache_icache_page()
fixes it, though a better performing fix would probably be to add an
exception table entry for the dcbst.

I can confirm that this seems to fix it.