This is a note to let you know that I've just added the patch titled
xtensa: re-wire umount syscall to sys_oldumount
to the 3.17-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:
xtensa-re-wire-umount-syscall-to-sys_oldumount.patch
and it can be found in the queue-3.17 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From 2651cc6974d47fc43bef1cd8cd26966e4f5ba306 Mon Sep 17 00:00:00 2001
From: Max Filippov <jcmvbkbc@xxxxxxxxx>
Date: Mon, 6 Oct 2014 21:01:17 +0400
Subject: xtensa: re-wire umount syscall to sys_oldumount
From: Max Filippov <jcmvbkbc@xxxxxxxxx>
commit 2651cc6974d47fc43bef1cd8cd26966e4f5ba306 upstream.
Userspace actually passes single parameter (path name) to the umount
syscall, so new umount just fails. Fix it by requesting old umount
syscall implementation and re-wiring umount to it.
Signed-off-by: Max Filippov <jcmvbkbc@xxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
arch/xtensa/include/uapi/asm/unistd.h | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
--- a/arch/xtensa/include/uapi/asm/unistd.h
+++ b/arch/xtensa/include/uapi/asm/unistd.h
@@ -384,7 +384,8 @@ __SYSCALL(174, sys_chroot, 1)
#define __NR_pivot_root 175
__SYSCALL(175, sys_pivot_root, 2)
#define __NR_umount 176
-__SYSCALL(176, sys_umount, 2)
+__SYSCALL(176, sys_oldumount, 1)
+#define __ARCH_WANT_SYS_OLDUMOUNT
#define __NR_swapoff 177
__SYSCALL(177, sys_swapoff, 1)
#define __NR_sync 178
Patches currently in stable-queue which might be from jcmvbkbc@xxxxxxxxx are
queue-3.17/xtensa-re-wire-umount-syscall-to-sys_oldumount.patch
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