This is a note to let you know that I've just added the patch titled
x86/syscalls/64: Add compat_sys_keyctl for 32-bit userspace
to the 4.4-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:
x86-syscalls-64-add-compat_sys_keyctl-for-32-bit-userspace.patch
and it can be found in the queue-4.4 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From f7d665627e103e82d34306c7d3f6f46f387c0d8b Mon Sep 17 00:00:00 2001
From: David Howells <dhowells@xxxxxxxxxx>
Date: Wed, 27 Jul 2016 11:42:38 +0100
Subject: x86/syscalls/64: Add compat_sys_keyctl for 32-bit userspace
From: David Howells <dhowells@xxxxxxxxxx>
commit f7d665627e103e82d34306c7d3f6f46f387c0d8b upstream.
x86_64 needs to use compat_sys_keyctl for 32-bit userspace rather than
calling sys_keyctl(). The latter will work in a lot of cases, thereby
hiding the issue.
Reported-by: Stephan Mueller <smueller@xxxxxxxxxx>
Tested-by: Stephan Mueller <smueller@xxxxxxxxxx>
Signed-off-by: David Howells <dhowells@xxxxxxxxxx>
Cc: Andy Lutomirski <luto@xxxxxxxxxx>
Cc: Borislav Petkov <bp@xxxxxxxxx>
Cc: Brian Gerst <brgerst@xxxxxxxxx>
Cc: Denys Vlasenko <dvlasenk@xxxxxxxxxx>
Cc: H. Peter Anvin <hpa@xxxxxxxxx>
Cc: Josh Poimboeuf <jpoimboe@xxxxxxxxxx>
Cc: Linus Torvalds <torvalds@xxxxxxxxxxxxxxxxxxxx>
Cc: Peter Zijlstra <peterz@xxxxxxxxxxxxx>
Cc: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
Cc: keyrings@xxxxxxxxxxxxxxx
Cc: linux-security-module@xxxxxxxxxxxxxxx
Link: http://lkml.kernel.org/r/146961615805.14395.5581949237156769439.stgit@xxxxxxxxxxxxxxxxxxxxxx
Signed-off-by: Ingo Molnar <mingo@xxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
arch/x86/entry/syscalls/syscall_32.tbl | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
--- a/arch/x86/entry/syscalls/syscall_32.tbl
+++ b/arch/x86/entry/syscalls/syscall_32.tbl
@@ -294,7 +294,7 @@
# 285 sys_setaltroot
286 i386 add_key sys_add_key
287 i386 request_key sys_request_key
-288 i386 keyctl sys_keyctl
+288 i386 keyctl sys_keyctl compat_sys_keyctl
289 i386 ioprio_set sys_ioprio_set
290 i386 ioprio_get sys_ioprio_get
291 i386 inotify_init sys_inotify_init
Patches currently in stable-queue which might be from dhowells@xxxxxxxxxx are
queue-4.4/x86-syscalls-64-add-compat_sys_keyctl-for-32-bit-userspace.patch
queue-4.4/keys-64-bit-mips-needs-to-use-compat_sys_keyctl-for-32-bit-userspace.patch
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