diff options
| author | Matthew Wilcox (Oracle) <willy@infradead.org> | 2022-01-10 23:15:27 +0000 |
|---|---|---|
| committer | Kees Cook <keescook@chromium.org> | 2022-04-13 12:15:50 -0700 |
| commit | 4e140f59d285c1ca1e5c81b4c13e27366865bd09 (patch) | |
| tree | 0e16718847cb02bacbe823ac5ba388619e46359f /arch | |
| parent | a19944809fe9942e6a96292490717904d0690c21 (diff) | |
mm/usercopy: Check kmap addresses properly
If you are copying to an address in the kmap region, you may not copy
across a page boundary, no matter what the size of the underlying
allocation. You can't kmap() a slab page because slab pages always
come from low memory.
Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org>
Acked-by: Kees Cook <keescook@chromium.org>
Signed-off-by: Kees Cook <keescook@chromium.org>
Link: https://lore.kernel.org/r/20220110231530.665970-2-willy@infradead.org
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/x86/include/asm/highmem.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/arch/x86/include/asm/highmem.h b/arch/x86/include/asm/highmem.h index 032e020853aa..731ee7cc40a5 100644 --- a/arch/x86/include/asm/highmem.h +++ b/arch/x86/include/asm/highmem.h @@ -26,6 +26,7 @@ #include <asm/tlbflush.h> #include <asm/paravirt.h> #include <asm/fixmap.h> +#include <asm/pgtable_areas.h> /* declarations for highmem.c */ extern unsigned long highstart_pfn, highend_pfn; |