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Code Issues Releases Wiki Activity

sparc64: Fix memory corruption when THP is enabled

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The memory corruption was happening due to incorrect
TLB/TSB flushing of hugepages.

Reported-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Nitin Gupta <nitin.m.gupta@oracle.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Nitin Gupta 2017-03-31 15:48:53 -07:00 committed by David S. Miller
parent 9ae34dbd8a
commit 76811263b3
2 changed files with 5 additions and 5 deletions
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6
arch/sparc/mm/tlb.c
View file

@ -154,7 +154,7 @@ static void tlb_batch_pmd_scan(struct mm_struct *mm, unsigned long vaddr,
if (pte_val(*pte) & _PAGE_VALID) {
bool exec = pte_exec(*pte);
tlb_batch_add_one(mm, vaddr, exec, false);
tlb_batch_add_one(mm, vaddr, exec, PAGE_SHIFT);
}
pte++;
vaddr += PAGE_SIZE;
@ -209,9 +209,9 @@ void set_pmd_at(struct mm_struct *mm, unsigned long addr,
pte_t orig_pte = __pte(pmd_val(orig));
bool exec = pte_exec(orig_pte);
tlb_batch_add_one(mm, addr, exec, true);
tlb_batch_add_one(mm, addr, exec, REAL_HPAGE_SHIFT);
tlb_batch_add_one(mm, addr + REAL_HPAGE_SIZE, exec,
true);
REAL_HPAGE_SHIFT);
} else {
tlb_batch_pmd_scan(mm, addr, orig);
}

4
arch/sparc/mm/tsb.c
View file

@ -122,7 +122,7 @@ void flush_tsb_user(struct tlb_batch *tb)
spin_lock_irqsave(&mm->context.lock, flags);
if (tb->hugepage_shift < HPAGE_SHIFT) {
if (tb->hugepage_shift < REAL_HPAGE_SHIFT) {
base = (unsigned long) mm->context.tsb_block[MM_TSB_BASE].tsb;
nentries = mm->context.tsb_block[MM_TSB_BASE].tsb_nentries;
if (tlb_type == cheetah_plus || tlb_type == hypervisor)
@ -155,7 +155,7 @@ void flush_tsb_user_page(struct mm_struct *mm, unsigned long vaddr,
spin_lock_irqsave(&mm->context.lock, flags);
if (hugepage_shift < HPAGE_SHIFT) {
if (hugepage_shift < REAL_HPAGE_SHIFT) {
base = (unsigned long) mm->context.tsb_block[MM_TSB_BASE].tsb;
nentries = mm->context.tsb_block[MM_TSB_BASE].tsb_nentries;
if (tlb_type == cheetah_plus || tlb_type == hypervisor)