diff options
| author | Jiri Kosina <[email protected]> | 2020-04-01 12:26:12 +0200 |
|---|---|---|
| committer | Jiri Kosina <[email protected]> | 2020-04-01 12:26:12 +0200 |
| commit | c9f289701540baeef9ac7c9977d67a7259f404db (patch) | |
| tree | ac3c29d41da02ac735c9a12da78905842fbccd2f /arch/sparc/mm/fault_64.c | |
| parent | 0aac6f9aaae5fba08963651d2ce49930145e118f (diff) | |
| parent | 910a7e89cec65efad254c947ce2bf8bf5b370962 (diff) | |
Merge branch 'for-5.7/appleir' into for-linus
- small code cleanups in hid-appleir from Lucas Tanure
Diffstat (limited to 'arch/sparc/mm/fault_64.c')
| -rw-r--r-- | arch/sparc/mm/fault_64.c | 6 |
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; |