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arc: fix off-by-one in mpu_buffer_validate()

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The code was probing the byte immediately after the last byte
of the buffer, instead of the last byte of the buffer.

Signed-off-by: Andrew Boie <andrew.p.boie@intel.com>
This commit is contained in:
Andrew Boie 2019-03-20 13:48:48 -07:00 • committed by Andrew Boie
commit 1f6ab221f2
1 changed files with 1 additions and 1 deletions
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2
arch/arc/core/mpu/arc_mpu_v3_internal.h
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@ -594,7 +594,7 @@ int arc_core_mpu_buffer_validate(void *addr, size_t size, int write)
*/
r_index = _mpu_probe((u32_t)addr);
/* match and the area is in one region */
if (r_index >= 0 && r_index == _mpu_probe((u32_t)addr + size)) {
if (r_index >= 0 && r_index == _mpu_probe((u32_t)addr + (size - 1))) {
if (_is_user_accessible_region(r_index, write)) {
return 0;
} else {