From ffabe4b59ef414b92894cf5b40e4e1e59eaac011 Mon Sep 17 00:00:00 2001 From: dcashman Date: Wed, 24 Feb 2016 13:31:22 -0800 Subject: BACKPORT: FROMLIST: mm: ASLR: use get_random_long() (cherry picked from commit https://lkml.org/lkml/2016/2/4/833) Replace calls to get_random_int() followed by a cast to (unsigned long) with calls to get_random_long(). Also address shifting bug which, in case of x86 removed entropy mask for mmap_rnd_bits values > 31 bits. Bug: 26963541 Signed-off-by: Daniel Cashman Signed-off-by: Daniel Cashman Change-Id: Ie577b21a0678cf4b21eae06bddd8ccb27cbe70ff --- arch/sparc/kernel/sys_sparc_64.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'arch/sparc/kernel') diff --git a/arch/sparc/kernel/sys_sparc_64.c b/arch/sparc/kernel/sys_sparc_64.c index 666510b39..c2c11c7d7 100644 --- a/arch/sparc/kernel/sys_sparc_64.c +++ b/arch/sparc/kernel/sys_sparc_64.c @@ -265,7 +265,7 @@ static unsigned long mmap_rnd(void) unsigned long rnd = 0UL; if (current->flags & PF_RANDOMIZE) { - unsigned long val = get_random_int(); + unsigned long val = get_random_long(); if (test_thread_flag(TIF_32BIT)) rnd = (val % (1UL << (23UL-PAGE_SHIFT))); else -- cgit v1.2.3