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Subject[PATCH] x86: More users of PF_ constants in fault_32|64.c
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Date
Should be the last of the error_code tests that could use
the PF_ defines. Makes X86_32|64 a little closer.

Signed-off-by: Harvey Harrison <harvey.harrison@gmail.com>
---
arch/x86/mm/fault_32.c | 7 ++++---
arch/x86/mm/fault_64.c | 2 +-
2 files changed, 5 insertions(+), 4 deletions(-)

diff --git a/arch/x86/mm/fault_32.c b/arch/x86/mm/fault_32.c
index 50a9930..adf5fed 100644
--- a/arch/x86/mm/fault_32.c
+++ b/arch/x86/mm/fault_32.c
@@ -404,7 +404,8 @@ void __kprobes do_page_fault(struct pt_regs *regs, unsigned long error_code)
* protection error (error_code & 9) == 0.
*/
if (unlikely(address >= TASK_SIZE)) {
- if (!(error_code & 0x0000000d) && vmalloc_fault(address) >= 0)
+ if (!(error_code & (PF_RSVD|PF_USER|PF_PROT)) &&
+ vmalloc_fault(address) >= 0)
return;
if (notify_page_fault(regs))
return;
@@ -607,7 +608,7 @@ no_context:
__typeof__(pte_val(__pte(0))) page;

#ifdef CONFIG_X86_PAE
- if (error_code & 16) {
+ if (error_code & PF_INSTR) {
pte_t *pte = lookup_address(address);

if (pte && pte_present(*pte) && !pte_exec_kernel(*pte))
@@ -678,7 +679,7 @@ out_of_memory:
goto survive;
}
printk("VM: killing process %s\n", tsk->comm);
- if (error_code & 4)
+ if (error_code & PF_USER)
do_group_exit(SIGKILL);
goto no_context;

diff --git a/arch/x86/mm/fault_64.c b/arch/x86/mm/fault_64.c
index 018ab78..267a1d5 100644
--- a/arch/x86/mm/fault_64.c
+++ b/arch/x86/mm/fault_64.c
@@ -681,7 +681,7 @@ out_of_memory:
goto again;
}
printk("VM: killing process %s\n", tsk->comm);
- if (error_code & 4)
+ if (error_code & PF_USER)
do_group_exit(SIGKILL);
goto no_context;

--
1.5.4.rc2.1164.g6451


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