x86, compat: Use test_thread_flag(TIF_IA32) in compat signal delivery
Suresh Siddha [Fri, 15 Jun 2012 01:07:15 +0000 (18:07 -0700)]
commit 0b91f45b23cb73ce11acdc3cf4c6efd4441e3b3e upstream.

Signal delivery compat path may not have the 'TS_COMPAT' flag (that
flag indicates how we entered the kernel).  So use
test_thread_flag(TIF_IA32) instead of is_ia32_task(): one of the
functions of TIF_IA32 is just what kind of signal frame we want.

Signed-off-by: Suresh Siddha <suresh.b.siddha@intel.com>
Link: http://lkml.kernel.org/r/1339722435.3475.57.camel@sbsiddha-desk.sc.intel.com
Signed-off-by: H. Peter Anvin <hpa@zytor.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

arch/x86/ia32/ia32_signal.c

index a69245b..4f5bfac 100644 (file)
@@ -38,7 +38,7 @@
 int copy_siginfo_to_user32(compat_siginfo_t __user *to, siginfo_t *from)
 {
        int err = 0;
-       bool ia32 = is_ia32_task();
+       bool ia32 = test_thread_flag(TIF_IA32);
 
        if (!access_ok(VERIFY_WRITE, to, sizeof(compat_siginfo_t)))
                return -EFAULT;