From: Alexandre Ghiti Date: Thu, 4 Apr 2019 06:26:22 +0000 (-0400) Subject: parisc: Consider stack randomization for mmap base only when necessary X-Git-Tag: v5.2-rc1~143^2~27 X-Git-Url: https://asedeno.scripts.mit.edu/gitweb/?a=commitdiff_plain;h=17d9822d4b4c1bfeb14971d9a2639698e7f5b1eb;p=linux.git parisc: Consider stack randomization for mmap base only when necessary Do not offset mmap base address because of stack randomization if current task does not want randomization. Signed-off-by: Alexandre Ghiti Signed-off-by: Helge Deller --- diff --git a/arch/parisc/kernel/sys_parisc.c b/arch/parisc/kernel/sys_parisc.c index 376ea0d1b275..4407ac4c1d84 100644 --- a/arch/parisc/kernel/sys_parisc.c +++ b/arch/parisc/kernel/sys_parisc.c @@ -86,7 +86,8 @@ static unsigned long mmap_upper_limit(struct rlimit *rlim_stack) stack_base = STACK_SIZE_MAX; /* Add space for stack randomization. */ - stack_base += (STACK_RND_MASK << PAGE_SHIFT); + if (current->flags & PF_RANDOMIZE) + stack_base += (STACK_RND_MASK << PAGE_SHIFT); return PAGE_ALIGN(STACK_TOP - stack_base); }