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Diffstat (limited to 'arch/mips/mm/fault.c')
-rw-r--r--arch/mips/mm/fault.c17
1 files changed, 12 insertions, 5 deletions
diff --git a/arch/mips/mm/fault.c b/arch/mips/mm/fault.c
index ec8077c74e9c..2d9624fd10ec 100644
--- a/arch/mips/mm/fault.c
+++ b/arch/mips/mm/fault.c
@@ -25,6 +25,7 @@
#include <asm/system.h>
#include <asm/uaccess.h>
#include <asm/ptrace.h>
+#include <asm/highmem.h> /* For VMALLOC_END */
/*
* This routine handles page faults. It determines the address,
@@ -57,7 +58,7 @@ asmlinkage void do_page_fault(struct pt_regs *regs, unsigned long write,
* only copy the information from the master page table,
* nothing more.
*/
- if (unlikely(address >= VMALLOC_START))
+ if (unlikely(address >= VMALLOC_START && address <= VMALLOC_END))
goto vmalloc_fault;
/*
@@ -140,7 +141,7 @@ bad_area_nosemaphore:
info.si_signo = SIGSEGV;
info.si_errno = 0;
/* info.si_code has been set above */
- info.si_addr = (void *) address;
+ info.si_addr = (void __user *) address;
force_sig_info(SIGSEGV, &info, tsk);
return;
}
@@ -196,7 +197,7 @@ do_sigbus:
info.si_signo = SIGBUS;
info.si_errno = 0;
info.si_code = BUS_ADRERR;
- info.si_addr = (void *) address;
+ info.si_addr = (void __user *) address;
force_sig_info(SIGBUS, &info, tsk);
return;
@@ -212,6 +213,7 @@ vmalloc_fault:
*/
int offset = __pgd_offset(address);
pgd_t *pgd, *pgd_k;
+ pud_t *pud, *pud_k;
pmd_t *pmd, *pmd_k;
pte_t *pte_k;
@@ -222,8 +224,13 @@ vmalloc_fault:
goto no_context;
set_pgd(pgd, *pgd_k);
- pmd = pmd_offset(pgd, address);
- pmd_k = pmd_offset(pgd_k, address);
+ pud = pud_offset(pgd, address);
+ pud_k = pud_offset(pgd_k, address);
+ if (!pud_present(*pud_k))
+ goto no_context;
+
+ pmd = pmd_offset(pud, address);
+ pmd_k = pmd_offset(pud_k, address);
if (!pmd_present(*pmd_k))
goto no_context;
set_pmd(pmd, *pmd_k);