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| author | Khalid Aziz <khalid.aziz@oracle.com> | 2018-02-21 18:15:50 +0100 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2018-03-18 15:38:47 +0100 |
| commit | 2c2d57b5e769956fb36581e0d3cccdb5ea68038f (patch) | |
| tree | 339cc77f5489da03b12eb478315429f2c60bcf9d /mm/mprotect.c | |
| parent | mm: Add address parameter to arch_validate_prot() (diff) | |
| download | linux-2c2d57b5e769956fb36581e0d3cccdb5ea68038f.tar.xz linux-2c2d57b5e769956fb36581e0d3cccdb5ea68038f.zip | |
mm: Clear arch specific VM flags on protection change
When protection bits are changed on a VMA, some of the architecture
specific flags should be cleared as well. An examples of this are the
PKEY flags on x86. This patch expands the current code that clears
PKEY flags for x86, to support similar functionality for other
architectures as well.
Signed-off-by: Khalid Aziz <khalid.aziz@oracle.com>
Cc: Khalid Aziz <khalid@gonehiking.org>
Reviewed-by: Anthony Yznaga <anthony.yznaga@oracle.com>
Acked-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'mm/mprotect.c')
| -rw-r--r-- | mm/mprotect.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/mm/mprotect.c b/mm/mprotect.c index 088ea9c08678..c1d6af7455da 100644 --- a/mm/mprotect.c +++ b/mm/mprotect.c @@ -475,7 +475,7 @@ static int do_mprotect_pkey(unsigned long start, size_t len, * cleared from the VMA. */ mask_off_old_flags = VM_READ | VM_WRITE | VM_EXEC | - ARCH_VM_PKEY_FLAGS; + VM_FLAGS_CLEAR; new_vma_pkey = arch_override_mprotect_pkey(vma, prot, pkey); newflags = calc_vm_prot_bits(prot, new_vma_pkey); |