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-rw-r--r--arch/sparc/mm/fault_64.c6
1 files changed, 5 insertions, 1 deletions
diff --git a/arch/sparc/mm/fault_64.c b/arch/sparc/mm/fault_64.c
index 2371fb6b97e4..8b7ddbd14b65 100644
--- a/arch/sparc/mm/fault_64.c
+++ b/arch/sparc/mm/fault_64.c
@@ -80,6 +80,7 @@ static void __kprobes bad_kernel_pc(struct pt_regs *regs, unsigned long vaddr)
static unsigned int get_user_insn(unsigned long tpc)
{
pgd_t *pgdp = pgd_offset(current->mm, tpc);
+ p4d_t *p4dp;
pud_t *pudp;
pmd_t *pmdp;
pte_t *ptep, pte;
@@ -88,7 +89,10 @@ static unsigned int get_user_insn(unsigned long tpc)
if (pgd_none(*pgdp) || unlikely(pgd_bad(*pgdp)))
goto out;
- pudp = pud_offset(pgdp, tpc);
+ p4dp = p4d_offset(pgdp, tpc);
+ if (p4d_none(*p4dp) || unlikely(p4d_bad(*p4dp)))
+ goto out;
+ pudp = pud_offset(p4dp, tpc);
if (pud_none(*pudp) || unlikely(pud_bad(*pudp)))
goto out;