[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] [Xen-devel] [PATCH 1/9] x86/mm: Don't dereference p2m pointer before NULL check.
Not a security bug, because in fact this is never called with a NULL argument. Coverity CID 1055955 Signed-off-by: Tim Deegan <tim@xxxxxxx> --- xen/arch/x86/mm/p2m.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/xen/arch/x86/mm/p2m.c b/xen/arch/x86/mm/p2m.c index f5ddd20..8f380ed 100644 --- a/xen/arch/x86/mm/p2m.c +++ b/xen/arch/x86/mm/p2m.c @@ -453,7 +453,7 @@ void p2m_teardown(struct p2m_domain *p2m) * We know we don't have any extra mappings to these pages */ { struct page_info *pg; - struct domain *d = p2m->domain; + struct domain *d; unsigned long gfn; p2m_type_t t; mfn_t mfn; @@ -461,6 +461,8 @@ void p2m_teardown(struct p2m_domain *p2m) if (p2m == NULL) return; + d = p2m->domain; + p2m_lock(p2m); /* Try to unshare any remaining shared p2m entries. Safeguard -- 1.7.10.4 _______________________________________________ Xen-devel mailing list Xen-devel@xxxxxxxxxxxxx http://lists.xen.org/xen-devel
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