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| author | Russell King <rmk+kernel@armlinux.org.uk> | 2020-10-28 14:59:34 +0000 |
|---|---|---|
| committer | Russell King <rmk+kernel@armlinux.org.uk> | 2020-10-28 14:59:34 +0000 |
| commit | 20f96e606509ee5084690179afe1810b95617a92 (patch) | |
| tree | 895c5fd7fd8b3d6c7a4afda9c82dc02bbe5fcc7a /arch/arm/mm/pgd.c | |
| parent | 9fa2e7af3d53a4b769136eccc32c02e128a4ee51 (diff) | |
| parent | fc2933c133744305236793025b00c2f7d258b687 (diff) | |
Merge branches 'fixes' and 'misc' into for-next
Diffstat (limited to 'arch/arm/mm/pgd.c')
| -rw-r--r-- | arch/arm/mm/pgd.c | 16 |
1 files changed, 15 insertions, 1 deletions
diff --git a/arch/arm/mm/pgd.c b/arch/arm/mm/pgd.c index c5e1b27046a8..f8e9bc58a84f 100644 --- a/arch/arm/mm/pgd.c +++ b/arch/arm/mm/pgd.c @@ -66,7 +66,21 @@ pgd_t *pgd_alloc(struct mm_struct *mm) new_pmd = pmd_alloc(mm, new_pud, 0); if (!new_pmd) goto no_pmd; -#endif +#ifdef CONFIG_KASAN + /* + * Copy PMD table for KASAN shadow mappings. + */ + init_pgd = pgd_offset_k(TASK_SIZE); + init_p4d = p4d_offset(init_pgd, TASK_SIZE); + init_pud = pud_offset(init_p4d, TASK_SIZE); + init_pmd = pmd_offset(init_pud, TASK_SIZE); + new_pmd = pmd_offset(new_pud, TASK_SIZE); + memcpy(new_pmd, init_pmd, + (pmd_index(MODULES_VADDR) - pmd_index(TASK_SIZE)) + * sizeof(pmd_t)); + clean_dcache_area(new_pmd, PTRS_PER_PMD * sizeof(pmd_t)); +#endif /* CONFIG_KASAN */ +#endif /* CONFIG_LPAE */ if (!vectors_high()) { /* |