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[3.11.y.z,extended,stable] Patch "audit: correct a type mismatch in audit_syscall_exit()" has been added to staging queue

Message ID 1391606041-31707-1-git-send-email-luis.henriques@canonical.com
State New
Headers show

Commit Message

Luis Henriques Feb. 5, 2014, 1:14 p.m. UTC
This is a note to let you know that I have just added a patch titled

    audit: correct a type mismatch in audit_syscall_exit()

to the linux-3.11.y-queue branch of the 3.11.y.z extended stable tree 
which can be found at:

 http://kernel.ubuntu.com/git?p=ubuntu/linux.git;a=shortlog;h=refs/heads/linux-3.11.y-queue

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

For more information about the 3.11.y.z tree, see
https://wiki.ubuntu.com/Kernel/Dev/ExtendedStable

Thanks.
-Luis

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From 8c2b7066db00d6135888637117918a70f358644b Mon Sep 17 00:00:00 2001
From: AKASHI Takahiro <takahiro.akashi@linaro.org>
Date: Mon, 13 Jan 2014 13:33:09 -0800
Subject: audit: correct a type mismatch in audit_syscall_exit()

commit 06bdadd7634551cfe8ce071fe44d0311b3033d9e upstream.

audit_syscall_exit() saves a result of regs_return_value() in intermediate
"int" variable and passes it to __audit_syscall_exit(), which expects its
second argument as a "long" value.  This will result in truncating the
value returned by a system call and making a wrong audit record.

I don't know why gcc compiler doesn't complain about this, but anyway it
causes a problem at runtime on arm64 (and probably most 64-bit archs).

Signed-off-by: AKASHI Takahiro <takahiro.akashi@linaro.org>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Cc: Eric Paris <eparis@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Eric Paris <eparis@redhat.com>
Signed-off-by: Luis Henriques <luis.henriques@canonical.com>
---
 include/linux/audit.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--
1.8.3.2
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Patch

diff --git a/include/linux/audit.h b/include/linux/audit.h
index 729a4d1..4fb28b2 100644
--- a/include/linux/audit.h
+++ b/include/linux/audit.h
@@ -135,7 +135,7 @@  static inline void audit_syscall_exit(void *pt_regs)
 {
 	if (unlikely(current->audit_context)) {
 		int success = is_syscall_success(pt_regs);
-		int return_code = regs_return_value(pt_regs);
+		long return_code = regs_return_value(pt_regs);

 		__audit_syscall_exit(success, return_code);
 	}