diff options
| author | Khalid Aziz <[email protected]> | 2018-02-21 10:15:49 -0700 |
|---|---|---|
| committer | David S. Miller <[email protected]> | 2018-03-18 07:38:47 -0700 |
| commit | 9035cf9a97e429e6b5291841da81c433879f5658 (patch) | |
| tree | d18593bc9412efa453a2b1e24ff860bfcb70ea9f /arch/powerpc/kernel/syscalls.c | |
| parent | c6202ca764ac7b3728e29bca616567beb57fbac7 (diff) | |
mm: Add address parameter to arch_validate_prot()
A protection flag may not be valid across entire address space and
hence arch_validate_prot() might need the address a protection bit is
being set on to ensure it is a valid protection flag. For example, sparc
processors support memory corruption detection (as part of ADI feature)
flag on memory addresses mapped on to physical RAM but not on PFN mapped
pages or addresses mapped on to devices. This patch adds address to the
parameters being passed to arch_validate_prot() so protection bits can
be validated in the relevant context.
Signed-off-by: Khalid Aziz <[email protected]>
Cc: Khalid Aziz <[email protected]>
Reviewed-by: Anthony Yznaga <[email protected]>
Acked-by: Michael Ellerman <[email protected]> (powerpc)
Acked-by: Andrew Morton <[email protected]>
Signed-off-by: David S. Miller <[email protected]>
Diffstat (limited to 'arch/powerpc/kernel/syscalls.c')
| -rw-r--r-- | arch/powerpc/kernel/syscalls.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/arch/powerpc/kernel/syscalls.c b/arch/powerpc/kernel/syscalls.c index a877bf8269fe..6d90ddbd2d11 100644 --- a/arch/powerpc/kernel/syscalls.c +++ b/arch/powerpc/kernel/syscalls.c @@ -48,7 +48,7 @@ static inline long do_mmap2(unsigned long addr, size_t len, { long ret = -EINVAL; - if (!arch_validate_prot(prot)) + if (!arch_validate_prot(prot, addr)) goto out; if (shift) { |