aboutsummaryrefslogtreecommitdiff
path: root/arch/powerpc/platforms/powermac/setup.c
diff options
context:
space:
mode:
authorSegher Boessenkool <segher@kernel.crashing.org>2007-06-20 01:07:04 +1000
committerPaul Mackerras <paulus@samba.org>2007-06-20 22:07:38 +1000
commit9ba4ace39fdfe22268daca9f28c5df384ae462cf (patch)
tree92a4ae33dec7bd3dd08f6d118ffd58a0d5247d5e /arch/powerpc/platforms/powermac/setup.c
parent7c8545e98468c53809fc06788a3b9a34dff05240 (diff)
[POWERPC] PowerPC: Prevent data exception in kernel space (32-bit)
The "is_exec" branch of the protection check in do_page_fault() didn't do anything on 32-bit PowerPC. So if a userland program jumps to a page with Linux protection flags "---p", all the tests happily fall through, and handle_mm_fault() is called, which in turn calls handle_pte_fault(), which calls update_mmu_cache(), which goes flush the dcache to a page with no access rights. Boom. This fixes it. Signed-off-by: Segher Boessenkool <segher@kernel.crashing.org> Cc: Johannes Berg <johannes@sipsolutions.net> Signed-off-by: Paul Mackerras <paulus@samba.org>
Diffstat (limited to 'arch/powerpc/platforms/powermac/setup.c')
0 files changed, 0 insertions, 0 deletions