Commit 62c9295f authored by Masami Hiramatsu's avatar Masami Hiramatsu Committed by Frederic Weisbecker
Browse files

kprobes/x86: Fix to add __kprobes to in-kernel fault handing functions



Add __kprobes to the functions which handle in-kernel fixable page
faults. Since kprobes can cause those in-kernel page faults by accessing
kprobe data structures, probing those fault functions will cause
fault-int3-loop (do_page_fault has already been marked as __kprobes).
Signed-off-by: default avatarMasami Hiramatsu <mhiramat@redhat.com>
Acked-by: default avatarAnanth N Mavinakayanahalli <ananth@in.ibm.com>
Cc: Ingo Molnar <mingo@elte.hu>
LKML-Reference: <20090827172311.8246.92725.stgit@localhost.localdomain>
Signed-off-by: default avatarFrederic Weisbecker <fweisbec@gmail.com>
parent f5ad3115
......@@ -38,7 +38,8 @@ enum x86_pf_error_code {
* Returns 0 if mmiotrace is disabled, or if the fault is not
* handled by mmiotrace:
*/
static inline int kmmio_fault(struct pt_regs *regs, unsigned long addr)
static inline int __kprobes
kmmio_fault(struct pt_regs *regs, unsigned long addr)
{
if (unlikely(is_kmmio_active()))
if (kmmio_handler(regs, addr) == 1)
......@@ -46,7 +47,7 @@ static inline int kmmio_fault(struct pt_regs *regs, unsigned long addr)
return 0;
}
static inline int notify_page_fault(struct pt_regs *regs)
static inline int __kprobes notify_page_fault(struct pt_regs *regs)
{
int ret = 0;
......@@ -239,7 +240,7 @@ void vmalloc_sync_all(void)
*
* Handle a fault on the vmalloc or module mapping area
*/
static noinline int vmalloc_fault(unsigned long address)
static noinline __kprobes int vmalloc_fault(unsigned long address)
{
unsigned long pgd_paddr;
pmd_t *pmd_k;
......@@ -361,7 +362,7 @@ void vmalloc_sync_all(void)
*
* This assumes no large pages in there.
*/
static noinline int vmalloc_fault(unsigned long address)
static noinline __kprobes int vmalloc_fault(unsigned long address)
{
pgd_t *pgd, *pgd_ref;
pud_t *pud, *pud_ref;
......@@ -858,7 +859,7 @@ static int spurious_fault_check(unsigned long error_code, pte_t *pte)
* There are no security implications to leaving a stale TLB when
* increasing the permissions on a page.
*/
static noinline int
static noinline __kprobes int
spurious_fault(unsigned long error_code, unsigned long address)
{
pgd_t *pgd;
......
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