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authorHelge Deller <deller@gmx.de>2017-07-02 22:00:41 +0200
committerHelge Deller <deller@gmx.de>2017-07-02 22:27:08 +0200
commit247462316f85a9e0479445c1a4223950b68ffac1 (patch)
treee50629d8faf711ee6eb415e48fa40f1dccffc76c /arch/parisc/mm/fault.c
parentparisc: use compat_sys_keyctl() (diff)
downloadlinux-dev-247462316f85a9e0479445c1a4223950b68ffac1.tar.xz
linux-dev-247462316f85a9e0479445c1a4223950b68ffac1.zip
parisc: Report SIGSEGV instead of SIGBUS when running out of stack
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 libsigsegv package. Cc: stable@vger.kernel.org Signed-off-by: Helge Deller <deller@gmx.de>
Diffstat (limited to '')
-rw-r--r--arch/parisc/mm/fault.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/arch/parisc/mm/fault.c b/arch/parisc/mm/fault.c
index 41448f7b2b2a..5b101f6a5607 100644
--- a/arch/parisc/mm/fault.c
+++ b/arch/parisc/mm/fault.c
@@ -359,7 +359,7 @@ bad_area:
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;