Displaying 2 results from an estimated 2 matches for "can_follow_write_pt".
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can_follow_write_pte
2016 Oct 26
2
CVE-2016-5195 DirtyCOW : Critical Linux Kernel Flaw
...42.6.2.el6/mm/memory.c
--- linux-2.6.32-642.6.1.el6/mm/memory.c 2016-08-25 08:06:57.000000000 -0700
+++ linux-2.6.32-642.6.2.el6/mm/memory.c 2016-10-24 06:19:16.000000000 -0700
@@ -1177,6 +1177,24 @@ int zap_vma_ptes(struct vm_area_struct *
}
EXPORT_SYMBOL_GPL(zap_vma_ptes);
+static inline bool can_follow_write_pte(pte_t pte, struct page *page,
+ unsigned int flags)
+{
+ if (pte_write(pte))
+ return true;
+
+ /*
+ * Make sure that we are really following CoWed page. We do not really
+ * have to care about exclusiveness of the page because we only want
+ * to ensure that once COWed page hasn't dis...
2016 Oct 25
5
CVE-2016-5195 DirtyCOW : Critical Linux Kernel Flaw
On Tue, 25 Oct 2016 10:06:12 +0200
Christian Anthon <anthon at rth.dk> wrote:
> What is the best approach on centos 6 to mitigate the problem is
> officially patched? As far as I can tell Centos 6 is vulnerable to
> attacks using ptrace.
I can confirm that c6 is vulnerable, we're running a patched kernel
(local build) using a rhel6 adaptation of the upstream fix.
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