diff options
| author | Joey Gouly <[email protected]> | 2023-06-06 15:58:51 +0100 |
|---|---|---|
| committer | Catalin Marinas <[email protected]> | 2023-06-06 16:52:41 +0100 |
| commit | 7c302cfbee1f6cc23d831be4b6cf42f331019e68 (patch) | |
| tree | 2ef10b9b6f56cf31bd749db63d11cb32649a9e10 /lib/test_fortify/write_overflow_field-memcpy.c | |
| parent | f0af339fc408a55c9f48f5d9ca47059ef1eb36b8 (diff) | |
arm64: add PTE_WRITE to PROT_SECT_NORMAL
With PIE enabled, PROT_SECT_NORMAL would map onto PAGE_KERNEL_RO.
Add PTE_WRITE so that this maps onto PAGE_KERNEL, so that it is writable.
Without PIE, this should enable DBM for PROT_SECT_NORMAL. However PTE_RDONLY
is already cleared, so the DBM mechanism is not used, and it is always writable,
so this is functionally equivalent.
Signed-off-by: Joey Gouly <[email protected]>
Cc: Will Deacon <[email protected]>
Cc: Mark Rutland <[email protected]>
Reviewed-by: Catalin Marinas <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Catalin Marinas <[email protected]>
Diffstat (limited to 'lib/test_fortify/write_overflow_field-memcpy.c')
0 files changed, 0 insertions, 0 deletions