From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, AKASHI Takahiro , Al Viro , Eric Paris , Andrew Morton Subject: [PATCH 3.12 009/107] audit: correct a type mismatch in audit_syscall_exit() Date: Tue, 11 Feb 2014 11:04:35 -0800 Message-Id: <20140211184748.469779400@linuxfoundation.org> In-Reply-To: <20140211184748.191276235@linuxfoundation.org> References: <20140211184748.191276235@linuxfoundation.org> MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Sender: linux-kernel-owner@vger.kernel.org List-ID: 3.12-stable review patch. If anyone has any objections, please let me know. ------------------ From: AKASHI Takahiro 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 Cc: Al Viro Cc: Eric Paris Signed-off-by: Andrew Morton Signed-off-by: Eric Paris Signed-off-by: Greg Kroah-Hartman --- include/linux/audit.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) --- a/include/linux/audit.h +++ b/include/linux/audit.h @@ -135,7 +135,7 @@ static inline void audit_syscall_exit(vo { 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); }