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authorRadu Caragea <sinaelgl@gmail.com>2013-08-13 16:00:59 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2013-08-13 17:57:49 -0700
commitdf54d6fa54275ce59660453e29d1228c2b45a826 (patch)
tree8e8c54da4a1cd7f9caca46b2b39d673c3bf7f793 /include/linux/sched.h
parentc7dd3392ad469e6ba125170ad29f881bed85b678 (diff)
downloadop-kernel-dev-df54d6fa54275ce59660453e29d1228c2b45a826.zip
op-kernel-dev-df54d6fa54275ce59660453e29d1228c2b45a826.tar.gz
x86 get_unmapped_area(): use proper mmap base for bottom-up direction
When the stack is set to unlimited, the bottomup direction is used for mmap-ings but the mmap_base is not used and thus effectively renders ASLR for mmapings along with PIE useless. Cc: Michel Lespinasse <walken@google.com> Cc: Oleg Nesterov <oleg@redhat.com> Reviewed-by: Rik van Riel <riel@redhat.com> Acked-by: Ingo Molnar <mingo@kernel.org> Cc: Adrian Sendroiu <molecula2788@gmail.com> Cc: <stable@vger.kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'include/linux/sched.h')
-rw-r--r--include/linux/sched.h1
1 files changed, 1 insertions, 0 deletions
diff --git a/include/linux/sched.h b/include/linux/sched.h
index d722490..923dd6e 100644
--- a/include/linux/sched.h
+++ b/include/linux/sched.h
@@ -314,6 +314,7 @@ struct nsproxy;
struct user_namespace;
#ifdef CONFIG_MMU
+extern unsigned long mmap_legacy_base(void);
extern void arch_pick_mmap_layout(struct mm_struct *mm);
extern unsigned long
arch_get_unmapped_area(struct file *, unsigned long, unsigned long,
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