From: "Kirill A. Shutemov" <kirill.shutemov@linux.intel.com>
To: Andrew Morton <akpm@linux-foundation.org>,
Linus Torvalds <torvalds@linux-foundation.org>
Cc: Dmitry Vyukov <dvyukov@google.com>,
Oleg Nesterov <oleg@redhat.com>,
Andrea Arcangeli <aarcange@redhat.com>,
Tony Luck <tony.luck@intel.com>,
linux-mm@kvack.org, linux-kernel@vger.kernel.org,
"Kirill A. Shutemov" <kirill.shutemov@linux.intel.com>
Subject: [PATCH] ia64: Make stack VMA anonymous
Date: Wed, 1 Aug 2018 16:08:01 +0300 [thread overview]
Message-ID: <20180801130801.30095-1-kirill.shutemov@linux.intel.com> (raw)
IA64 allocates stack in a custom way. Stack has to be marked as
anonymous otherwise the process will be killed with SIGBUS on the first
access to the stack.
Add missing vma_set_anonymous().
Signed-off-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Reported-by: Tony Luck <tony.luck@intel.com>
Fixes: bfd40eaff5ab ("mm: fix vma_is_anonymous() false-positives")
---
arch/ia64/mm/init.c | 1 +
1 file changed, 1 insertion(+)
diff --git a/arch/ia64/mm/init.c b/arch/ia64/mm/init.c
index e6c6dfd98de2..99044db28040 100644
--- a/arch/ia64/mm/init.c
+++ b/arch/ia64/mm/init.c
@@ -116,6 +116,7 @@ ia64_init_addr_space (void)
*/
vma = vm_area_alloc(current->mm);
if (vma) {
+ vma_set_anonymous(vma);
vma->vm_start = current->thread.rbs_bot & PAGE_MASK;
vma->vm_end = vma->vm_start + PAGE_SIZE;
vma->vm_flags = VM_DATA_DEFAULT_FLAGS|VM_GROWSUP|VM_ACCOUNT;
--
2.18.0
next reply other threads:[~2018-08-01 13:08 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-08-01 13:08 Kirill A. Shutemov [this message]
2018-08-01 15:32 ` [PATCH] ia64: Make stack VMA anonymous Luck, Tony
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