parisc: improve SIGBUS/SIGSEGV error reporting

This patch fixes most of the Linux Test Project testcases, e.g. fstat05.

Signed-off-by: Helge Deller <deller@gmx.de>

1 files changed, 20 insertions, 2 deletions

diff --git a/arch/parisc/mm/fault.c b/arch/parisc/mm/fault.c
index 7584a5df0fa4..9d08c71a967e 100644
--- a/arch/parisc/mm/fault.c
+++ b/arch/parisc/mm/fault.c
@@ -282,16 +282,34 @@ bad_area:
 #endif
                 switch (code) {
                 case 15:        /* Data TLB miss fault/Data page fault */
+                        /* send SIGSEGV when outside of vma */
+                        if (!vma ||
+                            address < vma->vm_start || address > vma->vm_end) {
+                                si.si_signo = SIGSEGV;
+                                si.si_code = SEGV_MAPERR;
+                                break;
+                        }
+
+                        /* send SIGSEGV for wrong permissions */
+                        if ((vma->vm_flags & acc_type) != acc_type) {
+                                si.si_signo = SIGSEGV;
+                                si.si_code = SEGV_ACCERR;
+                                break;
+                        }
+
+                        /* probably address is outside of mapped file */
+                        /* fall through */
                 case 17:        /* NA data TLB miss / page fault */
                 case 18:        /* Unaligned access - PCXS only */
                         si.si_signo = SIGBUS;
-                        si.si_code = BUS_ADRERR;
+                        si.si_code = (code == 18) ? BUS_ADRALN : BUS_ADRERR;
                         break;
                 case 16:        /* Non-access instruction TLB miss fault */
                 case 26:        /* PCXL: Data memory access rights trap */
                 default:
                         si.si_signo = SIGSEGV;
-                        si.si_code = SEGV_MAPERR;
+                        si.si_code = (code == 26) ? SEGV_ACCERR : SEGV_MAPERR;
+                        break;
                 }
                 si.si_errno = 0;
                 si.si_addr = (void __user *) address;