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linux/arch/x86/mm
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Suresh Siddha 502f660466 x86, cpa: Fix kernel text RO checks in static_protection() 
Steven Rostedt reported that we are unconditionally making the
kernel text mapping as read-only. i.e., if someone does cpa() to
the kernel text area for setting/clearing any page table
attribute, we unconditionally clear the read-write attribute for
the kernel text mapping that is set at compile time.

We should delay (to forbid the write attribute) and enforce only
after the kernel has mapped the text as read-only.

Reported-by: Steven Rostedt <rostedt@goodmis.org>
Signed-off-by: Suresh Siddha <suresh.b.siddha@intel.com>
Acked-by: Steven Rostedt <rostedt@goodmis.org>
Tested-by: Steven Rostedt <rostedt@goodmis.org>
LKML-Reference: <20091029024820.996634347@sbs-t61.sc.intel.com>
[ marked kernel_set_to_readonly as __read_mostly ]
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-11-02 17:16:35 +01:00
..
kmemcheck Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/vegard/kmemcheck 2009-09-22 08:07:54 -07:00
dump_pagetables.c x86: remove (null) in /sys kernel_page_tables 2009-04-14 11:50:22 +02:00
extable.c x86: uaccess: introduce try and catch framework 2009-01-23 17:17:36 -08:00
fault.c Merge branch 'hwpoison' of git://git.kernel.org/pub/scm/linux/kernel/git/ak/linux-mce-2.6 2009-09-24 07:53:22 -07:00
gup.c Merge branch 'perfcounters-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip 2009-06-20 11:29:32 -07:00
highmem_32.c Merge branch 'kvm-updates/2.6.32' of git://git.kernel.org/pub/scm/virt/kvm/kvm 2009-09-14 17:43:43 -07:00
hugetlbpage.c x86: ignore VM_LOCKED when determining if hugetlb-backed page tables can be shared or not 2009-05-29 08:40:03 -07:00
init.c x86: split NX setup into separate file to limit unstack-protected code 2009-09-21 13:56:58 -07:00
init_32.c x86, cpa: Fix kernel text RO checks in static_protection() 2009-11-02 17:16:35 +01:00
init_64.c x86, cpa: Fix kernel text RO checks in static_protection() 2009-11-02 17:16:35 +01:00
iomap_32.c x86, pat: Add PAT reserve free to io_mapping* APIs 2009-08-26 15:41:16 -07:00
ioremap.c Merge branch 'x86-pat-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip 2009-09-15 09:19:38 -07:00
k8topology_64.c x86: Export k8 physical topology 2009-10-12 22:56:45 +02:00
kmmio.c Merge branch 'linus' into tracing/core 2009-05-07 11:17:34 +02:00
Makefile x86: split NX setup into separate file to limit unstack-protected code 2009-09-21 13:56:58 -07:00
memtest.c x86: memtest: use pointers of equal type for comparison 2009-06-11 16:26:35 +02:00
mmap.c x86: Increase MIN_GAP to include randomized stack 2009-09-10 17:00:12 -07:00
mmio-mod.c tracing: x86, mmiotrace: only register for die notifier when tracer active 2009-04-29 11:33:34 +02:00
numa.c cpumask: convert node_to_cpumask_map[] to cpumask_var_t 2009-03-13 14:35:31 +01:00
numa_32.c x86: Export k8 physical topology 2009-10-12 22:56:45 +02:00
numa_64.c x86: Interleave emulated nodes over physical nodes 2009-10-12 22:56:46 +02:00
pageattr-test.c x86: make sure the CPA test code's use of _PAGE_UNUSED1 is obvious 2008-09-05 17:09:57 +02:00
pageattr.c x86, cpa: Fix kernel text RO checks in static_protection() 2009-11-02 17:16:35 +01:00
pat.c x86: Reduce verbosity of "PAT enabled" kernel message 2009-09-24 11:35:19 +02:00
pf_in.c x86: fix mmiotrace 8-bit register decoding 2008-10-14 10:33:50 +02:00
pf_in.h x86 mmiotrace: move files into arch/x86/mm/. 2008-05-24 11:25:37 +02:00
pgtable.c x86, 32-bit: Fix double accounting in reserve_top_address() 2009-08-04 16:27:29 +02:00
pgtable_32.c x86/32: no need to use set_pte_present in set_pte_vaddr 2009-03-19 14:04:18 +01:00
physaddr.c x86: split __phys_addr out into separate file 2009-09-10 11:48:55 -07:00
physaddr.h x86: split __phys_addr out into separate file 2009-09-10 11:48:55 -07:00
setup_nx.c x86: split NX setup into separate file to limit unstack-protected code 2009-09-21 13:56:58 -07:00
srat_32.c x86: Decrease the level of some NUMA messages to KERN_DEBUG 2009-09-06 06:32:23 +02:00
srat_64.c x86: Interleave emulated nodes over physical nodes 2009-10-12 22:56:46 +02:00
testmmiotrace.c x86: add far read test to testmmiotrace 2009-03-02 10:20:35 +01:00
tlb.c cpumask: use mm_cpumask() wrapper: x86 2009-09-24 09:34:52 +09:30