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linux/arch/powerpc/mm
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Aneesh Kumar K.V f5a73e9c4a powerpc/mm: Recompute hash value after a failed update 
commit 36b35d5d80 upstream.

If we had secondary hash flag set, we ended up modifying hash value in
the updatepp code path. Hence with a failed updatepp we will be using
a wrong hash value for the following hash insert. Fix this by
recomputing hash before insert.

Without this patch we can end up with using wrong slot number in linux
pte. That can result in us missing an hash pte update or invalidate
which can cause memory corruption or even machine check.

Fixes: 6d492ecc64 ("powerpc/THP: Add code to handle HPTE faults for hugepages")
Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
Reviewed-by: Paul Mackerras <paulus@samba.org>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
History 2015-09-29 19:26:05 +02:00
..
40x_mmu.c memblock: Remove rmo_size, burry it in arch/powerpc where it belongs 2010-08-05 12:56:08 +10:00
44x_mmu.c powerpc: Delete __cpuinit usage from all users 2013-07-01 11:10:36 +10:00
copro_fault.c ppc64: add paranoid warnings for unexpected DSISR_PROTFAULT 2015-02-12 18:54:08 -08:00
dma-noncoherent.c powerpc: Fix compile errors with STRICT_MM_TYPECHECKS enabled 2015-04-10 20:02:47 +10:00
fault.c ppc64: add paranoid warnings for unexpected DSISR_PROTFAULT 2015-02-12 18:54:08 -08:00
fsl_booke_mmu.c powerpc: Fix compile errors with STRICT_MM_TYPECHECKS enabled 2015-04-10 20:02:47 +10:00
hash_low_32.S powerpc: Use CURRENT_THREAD_INFO instead of open coded assembly 2012-07-11 14:18:22 +10:00
hash_low_64.S powerpc/mm: don't do tlbie for updatepp request with NO HPTE fault 2014-12-05 16:26:15 +11:00
hash_native_64.c powerpc/mm: don't do tlbie for updatepp request with NO HPTE fault 2014-12-05 16:26:15 +11:00
hash_utils_64.c powerpc/mm: Fix build error with CONFIG_PPC_TRANSACTIONAL_MEM disabled 2015-04-23 17:42:14 +10:00
highmem.c mm: fix race in kunmap_atomic() 2010-10-27 18:03:05 -07:00
hugepage-hash64.c powerpc/mm: Recompute hash value after a failed update 2015-09-29 19:26:05 +02:00
hugetlbpage-book3e.c powerpc: Replace __get_cpu_var uses 2014-11-03 12:12:32 +11:00
hugetlbpage-hash64.c powerpc/mm: don't do tlbie for updatepp request with NO HPTE fault 2014-12-05 16:26:15 +11:00
hugetlbpage.c powerpc/mm: Return NULL for not present hugetlb page 2015-05-12 11:04:29 +10:00
icswx.c powerpc: Fix typo "CONFIG_ICSWX_PID" 2013-04-18 13:03:54 +10:00
icswx.h powerpc/icswx: Fix race condition with IPI setting ACOP 2012-03-07 17:06:09 +11:00
icswx_pid.c powerpc: Split ICSWX ACOP and PID processing 2011-11-25 14:11:27 +11:00
init_32.c powerpc: Remove superfluous bootmem includes 2014-11-10 09:59:26 +11:00
init_64.c powerpc/mm: Free string after creating kmem cache 2015-03-26 15:23:17 +11:00
Makefile powerpc/vphn: move VPHN parsing logic to a separate file 2015-03-18 10:48:59 +11:00
mem.c powerpc: Replace mem_init_done with slab_is_available() 2015-04-10 20:02:48 +10:00
mmap.c mm: expose arch_mmap_rnd when available 2015-04-14 16:49:05 -07:00
mmu_context_hash32.c powerpc: Remove power3 from comments 2014-07-28 14:10:26 +10:00
mmu_context_hash64.c powerpc: Reduce PTE table memory wastage 2013-04-30 16:00:07 +10:00
mmu_context_nohash.c powerpc/8xx: reduce pressure on TLB due to context switches 2015-01-29 21:51:06 -06:00
mmu_decl.h powerpc/mm: Change setbat() to take a pgprot_t rather than flags 2015-04-07 17:15:13 +10:00
numa.c powerpc/numa: Reset node_possible_map to only node_online_map 2015-03-23 13:25:53 +11:00
pgtable.c mm: convert p[te|md]_numa users to p[te|md]_protnone_numa 2015-02-12 18:54:08 -08:00
pgtable_32.c powerpc: Replace mem_init_done with slab_is_available() 2015-04-10 20:02:48 +10:00
pgtable_64.c powerpc/thp: Serialize pmd clear against a linux page table walk. 2015-05-12 11:03:29 +10:00
ppc_mmu_32.c powerpc/mm: Change setbat() to take a pgprot_t rather than flags 2015-04-07 17:15:13 +10:00
slb.c powerpc/cell: Move data segment faulting code out of cell platform 2014-10-08 20:14:55 +11:00
slb_low.S Merge remote-tracking branch 'anton/abiv2' into next 2014-05-05 20:57:12 +10:00
slice.c powerpc: Remove some unused functions 2015-01-28 15:00:24 +11:00
subpage-prot.c arch/powerpc/mm/subpage-prot.c: use walk->vma and walk_page_vma() 2015-02-11 17:06:06 -08:00
tlb_hash32.c powerpc: include export.h for files using EXPORT_SYMBOL/THIS_MODULE 2011-10-31 19:30:38 -04:00
tlb_hash64.c powerpc: Fix compile errors with STRICT_MM_TYPECHECKS enabled 2015-04-10 20:02:47 +10:00
tlb_low_64e.S powerpc/e6500: Work around erratum A-008139 2014-07-29 19:26:29 -05:00
tlb_nohash.c powerpc/mm: Warn on flushing tlb page in kernel context 2015-02-04 13:19:27 +11:00
tlb_nohash_low.S powerpc/fsl_booke: smp support for booting a relocatable kernel above 64M 2014-01-09 17:52:18 -06:00
vphn.c powerpc/vphn: parsing code rewrite 2015-03-18 10:48:59 +11:00
vphn.h powerpc/vphn: parsing code rewrite 2015-03-18 10:48:59 +11:00