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| author | Takashi Iwai <tiwai@suse.de> | 2023-08-24 09:27:21 +0200 |
|---|---|---|
| committer | Takashi Iwai <tiwai@suse.de> | 2023-08-24 09:27:21 +0200 |
| commit | a057efde80453c68c60e156803578a654b52c39f (patch) | |
| tree | 51c312e95de536b6a29d18a12cfdba72029e09ad /mm/pagewalk.c | |
| parent | 17a1eab7b70d85fc5711f37bb6e530b771736bb7 (diff) | |
| parent | a4a6eed851bb661477654d772807d0e5aee5629c (diff) | |
Merge branch 'for-linus' into for-next
Back-merge the 6.5-devel branch for the clean patch application for
6.6 and resolving merge conflicts.
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Diffstat (limited to 'mm/pagewalk.c')
| -rw-r--r-- | mm/pagewalk.c | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/mm/pagewalk.c b/mm/pagewalk.c index 64437105fe0d..2022333805d3 100644 --- a/mm/pagewalk.c +++ b/mm/pagewalk.c @@ -48,8 +48,11 @@ static int walk_pte_range(pmd_t *pmd, unsigned long addr, unsigned long end, if (walk->no_vma) { /* * pte_offset_map() might apply user-specific validation. + * Indeed, on x86_64 the pmd entries set up by init_espfix_ap() + * fit its pmd_bad() check (_PAGE_NX set and _PAGE_RW clear), + * and CONFIG_EFI_PGT_DUMP efi_mm goes so far as to walk them. */ - if (walk->mm == &init_mm) + if (walk->mm == &init_mm || addr >= TASK_SIZE) pte = pte_offset_kernel(pmd, addr); else pte = pte_offset_map(pmd, addr); |