When a process runs out of stack the parisc kernel wrongly faults with SIGBUS
instead of the expected SIGSEGV signal.
This example shows how the kernel faults:
do_page_fault() command='a.out' type=15 address=0xfaac2000 in libc-2.24.so[f8308000+16c000]
trap #15: Data TLB miss fault, vm_start = 0xfa2c2000, vm_end = 0xfaac2000
The vma->vm_end value is the first address which does not belong to the vma, so
adjust the check to include vma->vm_end to the range for which to send the
SIGSEGV signal.
This patch unbreaks building the debian libsegv package.
Cc: stable@xxxxxxxxxxxxxxx
Signed-off-by: Helge Deller <deller@xxxxxx>
diff --git a/arch/parisc/mm/fault.c b/arch/parisc/mm/fault.c
index 32ec221..9fd95fe 100644
--- a/arch/parisc/mm/fault.c
+++ b/arch/parisc/mm/fault.c
@@ -367,7 +367,7 @@ void do_page_fault(struct pt_regs *regs, unsigned long 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) {
+ address < vma->vm_start || address >= vma->vm_end) {
si.si_signo = SIGSEGV;
si.si_code = SEGV_MAPERR;
break;
--
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