x86/entry/32: Add missing ASM_CLAC to general_protection entry

commit 3d51507f29f2153a658df4a0674ec5b592b62085 upstream.

All exception entry points must have ASM_CLAC right at the
beginning. The general_protection entry is missing one.

Fixes: e59d1b0a2419 ("x86-32, smap: Add STAC/CLAC instructions to 32-bit kernel entry")
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Frederic Weisbecker <frederic@kernel.org>
Reviewed-by: Alexandre Chartre <alexandre.chartre@oracle.com>
Reviewed-by: Andy Lutomirski <luto@kernel.org>
Cc: stable@vger.kernel.org
Link: https://lkml.kernel.org/r/20200225220216.219537887@linutronix.de
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/arch/x86/entry/entry_32.S b/arch/x86/entry/entry_32.S
index 49adabd94f883faf7f9c93b9cbd1121e4c1243d4..c19974a493784e1cc40f75452a96179f1010625a 100644 (file)
--- a/arch/x86/entry/entry_32.S
+++ b/arch/x86/entry/entry_32.S
@@ -1057,6 +1057,7 @@ ENTRY(int3)
 END(int3)
 
 ENTRY(general_protection)
+       ASM_CLAC
        pushl   $do_general_protection
        jmp     common_exception
 END(general_protection)