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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: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
AKASHI Takahiro 2014-01-13 13:33:09 -08:00 committed by Greg Kroah-Hartman
parent 5593165455
commit cd1188e7a5
1 changed files with 1 additions and 1 deletions
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2
include/linux/audit.h
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@ -487,7 +487,7 @@ 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);
}