Patch "parisc: fix a bug when syscall number of tracee is __NR_Linux_syscalls" has been added to the 4.5-stable tree

Patch "parisc: fix a bug when syscall number of tracee is __NR_Linux_syscalls" has been added to the 4.5-stable tree

[gregkh]

This is a note to let you know that I've just added the patch titled

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

to the 4.5-stable tree which can be found at:
    http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
     parisc-fix-a-bug-when-syscall-number-of-tracee-is-__nr_linux_syscalls.patch
and it can be found in the queue-4.5 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@vger.kernel.org> know about it.


>From f0b22d1bb2a37a665a969e95785c75a4f49d1499 Mon Sep 17 00:00:00 2001
From: "Dmitry V. Levin" <ldv@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

From: Dmitry V. Levin <ldv@altlinux.org>

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@altlinux.org>
Acked-by: Helge Deller <deller@gmx.de>
Signed-off-by: Helge Deller <deller@gmx.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
 arch/parisc/kernel/syscall.S |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/arch/parisc/kernel/syscall.S
+++ b/arch/parisc/kernel/syscall.S
@@ -344,7 +344,7 @@ tracesys_next:
 #endif
 
 	cmpib,COND(=),n -1,%r20,tracesys_exit /* seccomp may have returned -1 */
-	comiclr,>>=	__NR_Linux_syscalls, %r20, %r0
+	comiclr,>>	__NR_Linux_syscalls, %r20, %r0
 	b,n	.Ltracesys_nosys
 
 	LDREGX  %r20(%r19), %r19


Patches currently in stable-queue which might be from ldv@altlinux.org are

queue-4.5/parisc-fix-a-bug-when-syscall-number-of-tracee-is-__nr_linux_syscalls.patch