From: Jason Yan yanaijie@huawei.com
maillist inclusion category: feature feature: PowerPC64 kaslr support bugzilla: 109306 CVE: NA
Reference: https://patchwork.ozlabs.org/project/linuxppc-dev/patch/20200330022023.3691-...
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The original kernel still exists in the memory, clear it now.
Signed-off-by: Jason Yan yanaijie@huawei.com Cc: Scott Wood oss@buserror.net Cc: Diana Craciun diana.craciun@nxp.com Cc: Michael Ellerman mpe@ellerman.id.au Cc: Christophe Leroy christophe.leroy@c-s.fr Cc: Benjamin Herrenschmidt benh@kernel.crashing.org Cc: Paul Mackerras paulus@samba.org Cc: Nicholas Piggin npiggin@gmail.com Cc: Kees Cook keescook@chromium.org Signed-off-by: Cui GaoSheng cuigaosheng1@huawei.com Signed-off-by: GUO Zihua guozihua@huawei.com --- arch/powerpc/mm/nohash/kaslr_booke.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-)
diff --git a/arch/powerpc/mm/nohash/kaslr_booke.c b/arch/powerpc/mm/nohash/kaslr_booke.c index 1cfeeff3b73d..12c5b0926e2e 100644 --- a/arch/powerpc/mm/nohash/kaslr_booke.c +++ b/arch/powerpc/mm/nohash/kaslr_booke.c @@ -376,8 +376,10 @@ notrace void __init kaslr_early_init(void *dt_ptr, phys_addr_t size) unsigned long kernel_sz;
if (IS_ENABLED(CONFIG_PPC64)) { - if (__run_at_load == 1) + if (__run_at_load == 1) { + kaslr_late_init(); return; + }
/* Get the first memblock size */ early_get_first_memblock_info(dt_ptr, &size);