[4.2.y-ckt stable] Patch "parisc: fix a bug when syscall number of tracee is __NR_Linux_syscalls" has been added to the 4.2.y-ckt tree

[Kamal Mostafa]

This is a note to let you know that I have just added a patch titled

    parisc: fix a bug when syscall number of tracee is __NR_Linux_syscalls

to the linux-4.2.y-queue branch of the 4.2.y-ckt extended stable tree 
which can be found at:

    https://git.launchpad.net/~canonical-kernel/linux/+git/linux-stable-ckt/log/?h=linux-4.2.y-queue

This patch is scheduled to be released in version 4.2.8-ckt10.

If you, or anyone else, feels it should not be added to this tree, please 
reply to this email.

For more information about the 4.2.y-ckt tree, see
https://wiki.ubuntu.com/Kernel/Dev/ExtendedStable

Thanks.
-Kamal

---8<------------------------------------------------------------

>From 47d2437301201ad212b2b63d5e23ff67f34dd58c Mon Sep 17 00:00:00 2001
From: "Dmitry V. Levin" <ldv at altlinux.org>
Date: Wed, 27 Apr 2016 04:56:11 +0300
Subject: parisc: fix a bug when syscall number of tracee is
 __NR_Linux_syscalls

commit f0b22d1bb2a37a665a969e95785c75a4f49d1499 upstream.

Do not load one entry beyond the end of the syscall table when the
syscall number of a traced process equals to __NR_Linux_syscalls.
Similar bug with regular processes was fixed by commit 3bb457af4fa8
("[PARISC] Fix bug when syscall nr is __NR_Linux_syscalls").

This bug was found by strace test suite.

Signed-off-by: Dmitry V. Levin <ldv at altlinux.org>
Acked-by: Helge Deller <deller at gmx.de>
Signed-off-by: Helge Deller <deller at gmx.de>
Signed-off-by: Kamal Mostafa <kamal at canonical.com>
---
 arch/parisc/kernel/syscall.S | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/parisc/kernel/syscall.S b/arch/parisc/kernel/syscall.S
index 02cf40c..099c236 100644
--- a/arch/parisc/kernel/syscall.S
+++ b/arch/parisc/kernel/syscall.S
@@ -342,7 +342,7 @@ tracesys_next:
 	stw     %r21, -56(%r30)                 /* 6th argument */
 #endif

-	comiclr,>>=	__NR_Linux_syscalls, %r20, %r0
+	comiclr,>>	__NR_Linux_syscalls, %r20, %r0
 	b,n	.Ltracesys_nosys

 	LDREGX  %r20(%r19), %r19
--
2.7.4