From: Marc Zyngier maz@kernel.org
commit eb48d154cd0dade56a0e244f0cfa198ea2925ed3 upstream.
The HYP rodata section is currently lumped together with the BSS, which isn't exactly what is expected (it gets registered with kmemleak, for example).
Move it away so that it is actually marked RO. As an added benefit, it isn't registered with kmemleak anymore.
Fixes: 380e18ade4a5 ("KVM: arm64: Introduce a BSS section for use at Hyp") Suggested-by: Catalin Marinas catalin.marinas@arm.com Signed-off-by: Marc Zyngier maz@kernel.org Cc: stable@vger.kernel.org #5.13 Acked-by: Catalin Marinas catalin.marinas@arm.com Link: https://lore.kernel.org/r/20210802123830.2195174-2-maz@kernel.org Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- arch/arm64/kernel/vmlinux.lds.S | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-)
--- a/arch/arm64/kernel/vmlinux.lds.S +++ b/arch/arm64/kernel/vmlinux.lds.S @@ -181,6 +181,8 @@ SECTIONS /* everything from this point to __init_begin will be marked RO NX */ RO_DATA(PAGE_SIZE)
+ HYPERVISOR_DATA_SECTIONS + idmap_pg_dir = .; . += IDMAP_DIR_SIZE; idmap_pg_end = .; @@ -260,8 +262,6 @@ SECTIONS _sdata = .; RW_DATA(L1_CACHE_BYTES, PAGE_SIZE, THREAD_ALIGN)
- HYPERVISOR_DATA_SECTIONS - /* * Data written with the MMU off but read with the MMU on requires * cache lines to be invalidated, discarding up to a Cache Writeback